Self-alignment poppet valve

Abstract

The utility model discloses a self-aligning poppet valve which comprises a valve seat and a valve plate, the valve seat and the sealing face of the valve plate are installed in an attached mode, the valve plate is arranged at the end of a valve shaft, the end, away from the valve plate, of the valve shaft is concentrically installed with an air cylinder, an air seal type shaft seal is arranged at the connecting position of the valve shaft and the air cylinder, an O-shaped ring is installed in the valve seat, and the O-shaped ring is arranged in the valve seat. The lift valve adopts a double-seal structure formed by combining an air seal and an O-shaped ring; a plurality of springs are arranged in the valve seat, the springs automatically adjust the sealing face according to deformation of the valve plate, the valve seat is automatically attached to the valve plate, the valve seat comprises a valve seat mounting plate and a valve seat pipe, the valve seat mounting plate is matched with the valve seat pipe, and the valve seat pipe can move up and down in the radial direction of the valve seat mounting plate. The sealing surface can be automatically adjusted according to the deformation condition of the valve plate, the valve plate can be automatically attached, meanwhile, the gas sealing amount is adjusted, the gas sealing effect is enhanced, and therefore waste gas leakage is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and in particular relates to a self-aligning lifting valve. Background Art

[0002] Volatile organic compounds (VOCs) mainly come from industries such as petroleum and petrochemicals, fine chemicals, surface coating, packaging and printing. Most organic waste gases are toxic and harmful and can directly harm human health. Industrial organic waste gas emissions are one of the main sources of urban pollution. VOCs emissions are an important reason for the formation of regional complex air pollution characteristics in my country. The regenerative thermal combustion device (RTO) is a device that burns and purifies industrial organic waste gas, uses a heat storage body to transfer the purified exhaust gas into the heat exchanger for cooling, and then heat exchanges and heats up the waste gas to be treated. The core component of the RTO is the lift valve. Due to the frequent switching of the lift valve and long-term operation in a high-temperature corrosive environment, the valve plate is prone to wear and deformation, resulting in poor valve sealing and causing RTO emissions to exceed the standard.

[0003] In view of the above factors, a self-aligning poppet valve is provided to enhance the sealing effect of the poppet valve, prevent RTO emissions from exceeding the standard, and improve RTO purification efficiency. Utility Model Content

[0004] The utility model aims to provide a self-aligning lift valve to solve the problems raised in the above background technology.

[0005] The purpose of the utility model is achieved through the following technical solutions: a self-aligning poppet valve, the poppet valve comprises a valve seat and a valve plate, the valve seat is fitted with the sealing surface of the valve plate, the valve plate is arranged at the end of the valve shaft, and the end of the valve shaft away from the valve plate is installed concentrically with the cylinder;

[0006] An air-sealed shaft seal is provided at the connection between the valve shaft and the cylinder, an O-ring is installed in the valve seat, and the poppet valve adopts a combination of an air seal and an O-ring to form a double sealing structure;

[0007] A plurality of springs are arranged inside the valve seat, and the springs automatically adjust the sealing surface according to the deformation of the valve plate, so as to automatically achieve the fitting of the valve seat and the valve plate.

[0008] Further, the valve seat comprises a valve seat mounting plate and a valve seat tube, the valve seat mounting plate cooperates with the valve seat tube, and the valve seat tube can move up and down along the radial direction of the valve seat mounting plate;

[0009] The valve seat mounting plate is provided with a mounting groove, and an O-ring is arranged in the mounting groove.

[0010] Furthermore, a plurality of sleeves are arranged on the valve seat mounting plate, springs are installed in the sleeves, and the springs are in contact with the valve seat tube.

[0011] Furthermore, the spring maintains an upward elastic force on the valve seat tube, and a pressure cover is detachably mounted on the valve seat mounting plate, and the pressure cover is in contact with and cooperates with the valve seat tube.

[0012] Furthermore, the valve seat mounting plate and the gland are connected via bolts.

[0013] Furthermore, the gland is provided with an air sealing interface, which is connected to a compressed air end, and the compressed air outputted from the compressed air end enters the gland through the air sealing interface.

[0014] Furthermore, when the poppet valve is opened, the spring makes the valve seat tube and the gland fit together;

[0015] When the lifting valve is closed, the valve plate presses the valve seat downward, and the spring automatically adjusts the descending height of the valve seat tube so that the valve plate and the valve seat fit together.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model adopts a double sealing structure composed of an air seal and an O-ring. A plurality of spring structures are arranged inside the valve seat. The sealing surface is automatically adjusted according to the deformation of the valve plate, and the valve plate is automatically fitted. At the same time, the air seal gas volume is adjusted to enhance the air seal effect, thereby preventing exhaust gas leakage. The valve seat mounting plate of the utility model is provided with an O-ring, which can always maintain the seal when the valve seat tube moves up and down.

[0018] The utility model valve seat mounting plate is provided with a plurality of sleeves, and a spring is provided in the sleeve, which can adaptively adjust the valve seat seal. When the valve is opened, the spring makes the valve seat tube and the gland fit together, reducing the compressed air consumption; when the valve is closed, the valve plate presses the valve seat downward, and the spring automatically adjusts the descending height of the valve seat tube, so that the valve plate and the valve seat fit together. Where the valve plate is pressed down to a large height, the gap between the valve seat tube and the gland is large, and the amount of compressed air output is large, thereby effectively isolating the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the self-aligning lift valve of the utility model;

[0020] Figure 2 It is a schematic diagram of the valve seat of the utility model. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figure 1-2 As shown, a self-aligning poppet valve comprises a valve seat 1 and a valve plate 2, wherein the valve seat 1 is installed in close contact with the sealing surface of the valve plate 2, the valve plate 2 is arranged at the end of the valve shaft 3, and the end of the valve shaft 3 away from the valve plate 2 is installed concentrically with the cylinder 5;

[0025] A gas-sealed shaft seal 4 is provided at the connection between the valve shaft 3 and the cylinder 5, an O-ring 17 is installed in the valve seat 1, and the poppet valve adopts a combination of a gas seal and an O-ring 17 to form a double sealing structure;

[0026] The above-mentioned gas-sealed shaft seal 4 is disclosed in the prior art and will not be described in detail here.

[0027] A plurality of springs 15 are disposed inside the valve seat 1 , and the springs 15 automatically adjust the sealing surface according to the deformation of the valve plate 2 , so as to automatically achieve the fitting of the valve seat 1 and the valve plate 2 .

[0028] In order to keep the seal at all times when the valve seat tube moves up and down in the use state, the valve seat 1 includes a valve seat mounting plate 11 and a valve seat tube 12. The valve seat mounting plate 11 is provided with a channel for matching with the valve seat tube 12. The valve seat tube 12 can move up and down along the radial direction of the valve seat mounting plate 11.

[0029] The valve seat mounting plate 11 is provided with a mounting groove, and an O-ring 17 is arranged in the mounting groove.

[0030] In order to facilitate automatic adjustment of the sealing surface according to the deformation of the valve plate when in use, a plurality of sleeves 16 are provided on the valve seat mounting plate 11 , and springs 15 are installed in the sleeves 16 , and the springs 15 are in contact with the valve seat tube 12 .

[0031] The spring 15 maintains an upward elastic force on the valve seat tube 12 . A pressure cover 13 is detachably mounted on the valve seat mounting plate 11 . The pressure cover 13 contacts and cooperates with the valve seat tube 12 .

[0032] In order to enable detachable installation in the use state, the valve seat mounting plate 11 and the pressure cover 13 are connected by bolts 18 .

[0033] In order to improve the sealing performance of the valve, the valve seat 1 adopts an air-sealing structure. The gland 13 is provided with an air-sealing interface 14 , which is connected to the compressed air end. The compressed air output by the compressed air end enters the gland 13 through the air-sealing interface 14 .

[0034] When the poppet valve is opened, the spring 15 makes the valve seat tube 12 and the gland 13 fit together, reducing the consumption of compressed air;

[0035] When the lifting valve is closed, the valve plate 2 presses the valve seat 1 downward, and the spring 15 automatically adjusts the descending height of the valve seat tube 12 so that the valve plate 2 and the valve seat 1 fit together.

[0036] When the poppet valve is closed, the valve plate 2 is pressed down to a large height, the gap between the valve seat tube 12 and the gland 13 is large, and the amount of compressed air output is large, thereby effectively isolating the exhaust gas.

[0037] The utility model adopts a spring plus air seal structure, which automatically adjusts the valve seat position according to the deformation situation, makes the valve seat and valve plate fit together, strengthens the air seal effect, effectively avoids the problem of increased sealing gap after long-term and frequent use of the valve shaft, and reduces leakage.

[0038] Compressed air can cool the valve seat and valve plate, reduce the deformation of the valve seat and valve plate at high temperature, reduce the impact of exhaust gas temperature on the sealing structure, improve the working environment of the valve plate and valve seat, greatly improve the stability of the poppet valve, ensure the sealing effect, and improve the RTO purification efficiency.

[0039] The double seal formed by the combination of the air seal and the O-ring protects the spring from corrosion by exhaust gas, high-temperature smoke and dust, which is conducive to the stable use of the self-aligning poppet valve.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-aligning poppet valve, characterized in that: The poppet valve comprises a valve seat (1) and a valve plate (2), wherein the valve seat (1) is mounted in close contact with the sealing surface of the valve plate (2), the valve plate (2) is arranged at the end of a valve shaft (3), and the end of the valve shaft (3) away from the valve plate (2) is mounted concentrically with the cylinder (5); A gas-sealed shaft seal (4) is provided at the connection between the valve shaft (3) and the cylinder (5), an O-ring (17) is installed in the valve seat (1), and the poppet valve adopts a combination of a gas seal and an O-ring (17) to form a double sealing structure; A plurality of springs (15) are arranged inside the valve seat (1), and the springs (15) automatically adjust the sealing surface according to the deformation of the valve plate (2), thereby automatically achieving the fitting of the valve seat (1) and the valve plate (2).

2. The self-aligning poppet valve according to claim 1, characterized in that: The valve seat (1) comprises a valve seat mounting plate (11) and a valve seat tube (12), the valve seat mounting plate (11) cooperates with the valve seat tube (12), and the valve seat tube (12) can move up and down along the radial direction of the valve seat mounting plate (11); The valve seat mounting plate (11) is provided with a mounting groove, and an O-ring (17) is arranged in the mounting groove.

3. The self-aligning poppet valve according to claim 2, characterized in that: A plurality of sleeves (16) are arranged on the valve seat mounting plate (11), and a spring (15) is installed in the sleeve (16), and the spring (15) is in contact with the valve seat tube (12).

4. The self-aligning poppet valve according to claim 3, characterized in that: The spring (15) maintains an upward elastic force on the valve seat tube (12); a pressure cover (13) is detachably mounted on the valve seat mounting plate (11); and the pressure cover (13) is in contact with and fits the valve seat tube (12).

5. The self-aligning poppet valve according to claim 4, characterized in that: The valve seat mounting plate (11) and the gland (13) are connected via bolts (18).

6. The self-aligning poppet valve according to claim 5, characterized in that: The gland (13) is provided with an air sealing interface (14), which is connected to a compressed air end, and compressed air output from the compressed air end enters the gland (13) through the air sealing interface (14).

7. The self-aligning poppet valve according to claim 6, characterized in that: When the poppet valve is opened, the spring (15) causes the valve seat tube (12) and the gland (13) to fit together; When the lifting valve is closed, the valve plate (2) presses the valve seat (1) downward, and the spring (15) automatically adjusts the descending height of the valve seat tube (12) so that the valve plate (2) and the valve seat (1) fit together.

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