Lift valve for incinerator

Abstract

A lifting valve for an incinerator comprises a valve shell, a valve cover is installed at the top end of the valve shell, an air cylinder is arranged above the valve cover, the air cylinder is in transmission connection with a valve rod, a valve plate is installed at the bottom end of the valve rod, an air inlet is formed in the side wall of the valve shell, an air outlet is formed in the bottom wall of the valve shell, and a valve seat is arranged above the air outlet. A dustproof guide sleeve and a sealing material are arranged on the inner wall of the filler cylinder, the guide sleeve is slidably connected with the valve rod, and a supporting mechanism is arranged between the valve rod and the valve plate. The lifting valve is effectively prevented from being stuck, thermal deformation of the valve plate is reduced, and stable and efficient operation of the incinerator is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of incinerator technology, and in particular to a lifting valve for incinerators. Background Technology

[0002] In an incinerator system, the lift valve is a key component ensuring stable and efficient incineration operation. Traditional lift valves have a copper sleeve installed on the valve cover to guide the valve stem. The copper sleeve contains a dustproof ring to prevent impurities from entering during the valve stem's movement, thus maintaining the normal operation of the lift valve.

[0003] However, when the incineration equipment is running, the temperature of the exhaust gas is between 60 and 260 degrees Celsius. It contains a large amount of dust and oil, and the temperature fluctuates greatly. At high temperatures, fine dust can easily adhere to the lifting valve rod. Over time, the dustproof ring will be damaged due to continuous friction. Once the dustproof ring fails, a large amount of impurities will rush in, causing the lifting valve to jam and unable to complete the lifting action normally, which will seriously interfere with the operation of the incinerator.

[0004] In summary, the existing lift valves in incinerators are prone to jamming. Therefore, we propose a lift valve for incinerators to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a lifting valve for an incinerator. By using this device, the existing problems in the background art mentioned above are solved.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: a lifting valve for an incinerator, comprising a valve housing, a valve cover installed at the top of the valve housing, a cylinder disposed above the valve cover, a valve stem drivenly connected to the cylinder, a valve plate installed at the bottom of the valve stem, an air inlet on the side wall of the valve housing, an air outlet on the bottom wall of the valve housing, a valve seat disposed above the air outlet, a packing cylinder fixedly connected inside the valve cover, a dustproof guide sleeve and sealing material disposed on the inner wall of the packing cylinder, a plurality of circumferentially arrayed dust discharge grooves disposed on the inner wall of the dustproof guide sleeve, the guide sleeve being slidably connected to the valve stem, and a support mechanism disposed between the valve stem and the valve plate.

[0007] Preferably, the packing sleeve is fixedly connected to the center of the valve cover, and the two ends of the packing sleeve are respectively located on the upper and lower sides of the valve cover. The dustproof guide sleeve is fixedly installed on the lower part of the inner wall of the packing sleeve, and the upper part of the inner wall of the packing sleeve is filled with sealing material.

[0008] Preferably, the bottom of the dust discharge trough is arc-shaped.

[0009] Preferably, a pressure cylinder is provided above the packing cylinder, the bottom end of the pressure cylinder is nested inside the packing cylinder, the pressure cylinder is slidably connected to the valve stem, and the pressure cylinder and the packing cylinder are fixedly connected on their outer walls by a flange and bolts.

[0010] Preferably, the support mechanism includes two symmetrical connecting rods, one end of which is fixedly connected to the valve stem, and the other end is fixedly connected to an arc-shaped support block. The support block is slidably connected to the inner wall of the valve body. Each support block is fixedly connected to the valve plate, and two symmetrical reinforcing ribs are fixedly connected between the support rod and the valve plate.

[0011] Preferably, an air inlet cover is provided on the outside of the valve housing where the air inlet is located, and an air outlet cover is provided on the outside of the valve housing where the air outlet is located. A flange is fixedly connected to the outer wall of both the air inlet cover and the air outlet cover at the end away from the valve housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. To prevent the lift valve from jamming, a dustproof guide sleeve is installed inside the stuffing box. Multiple dust discharge grooves with a circular array and an arc-shaped bottom are opened on the inner wall of the dustproof guide sleeve. This effectively collects and discharges fine dust adhering to the valve stem, preventing dust and other impurities from entering the gap between the valve stem and other components, reducing wear between components, and thus effectively preventing the lift valve from jamming due to the accumulation of impurities, ensuring the stability and reliability of the lift valve operation.

[0014] 2. To reduce the thermal deformation of the valve plate, a support mechanism is set between the valve stem and the valve plate. The support mechanism includes a support rod fixedly connected between the support block and the valve plate, and reinforcing ribs symmetrically connected between the support rod and the valve plate. This enables the support rod to provide stable support for the valve plate, and the reinforcing ribs to enhance the connection strength between the support rod and the valve plate. This effectively reduces the thermal deformation and thermal fatigue of the valve plate during long-term operation in high-temperature environments, and enhances the sealing performance and smooth opening and closing of the valve plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the valve housing in this utility model;

[0017] Figure 3 This is a schematic diagram showing the positional relationship between the packing cylinder and the dust discharge trough in this utility model;

[0018] Figure 4 This is a schematic diagram showing the positional relationship between the valve stem and the valve plate in this utility model.

[0019] In the diagram: 1. Valve housing; 2. Valve cover; 3. Cylinder; 4. Valve stem; 5. Valve plate; 6. Air inlet; 7. Packing sleeve; 8. Dustproof guide sleeve; 81. Dust discharge trough; 9. Air outlet; 10. Valve seat; 11. Support mechanism; 111. Connecting rod; 112. Support block; 113. Support rod; 114. Reinforcing rib; 12. Air inlet hood; 13. Air outlet hood; 14. Pressure cylinder. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0022] Combination Figures 1-4 A lifting valve for an incinerator includes a valve housing 1. A valve cover 2 is detachably mounted on the top of the valve housing 1 via bolts. A bracket is welded to the top of the valve cover 2, and a cylinder 3 is mounted on the top of the bracket. A valve stem 4 is connected to the output end of the cylinder 3 via a coupling. A valve plate 5 is mounted on the bottom end of the valve stem 4. An air inlet 6 is provided on the side wall of the valve housing 1 for introducing waste gas from incineration in the incinerator. An air outlet 9 is provided on the bottom wall of the valve housing 1 for introducing waste gas into the inlet and outlet pipes. A valve seat 10 is provided above the air outlet 9. The cylinder 3 transmits its linear motion to the valve stem 4, thereby driving the valve stem 4 to move up and down. The movement of the valve stem 4 causes the valve plate 5 to move relative to the valve seat 10 above the air outlet 9, thereby controlling the movement of the valve stem 4 relative to the incinerator. For the control of internal gas flow, a packing cylinder 7 is fixedly connected inside the valve cover 2. The inner wall of the packing cylinder 7 is provided with a dustproof guide sleeve 8 and a graphite sealing material. The guide sleeve 8 is slidably connected to the valve stem 4. The dustproof guide sleeve 8 provides guidance for the valve stem 4 and prevents dust intrusion. The sealing material prevents gas leakage. The inner wall of the dustproof guide sleeve 8 has multiple circumferentially arrayed dust discharge grooves 81. The bottom of the dust discharge grooves 81 is arc-shaped. During the movement of the valve stem 4, when the fine dust adhering to the valve stem 4 enters the dustproof guide sleeve 8 along with the valve stem 4, the dust discharge grooves 81 can effectively discharge the dust. A support mechanism 11 is provided between the valve stem 4 and the valve plate 5 to enhance the stability of the valve plate 5 and reduce thermal deformation and thermal fatigue.

[0023] The packing cylinder 7 is fixedly connected to the center of the valve cover 2, and the two ends of the packing cylinder 7 are located on the upper and lower sides of the valve cover 2 respectively. The dustproof guide sleeve 8 is fixedly installed on the lower part of the inner wall of the packing cylinder 7. When the valve stem 4 moves up and down, the dustproof guide sleeve 8 fits tightly against the valve stem 4, providing precise linear guidance for the valve stem 4 and ensuring the stability of the valve stem 4's lifting and lowering. At the same time, it can effectively block dust and other impurities, preventing them from entering the gap between the valve stem 4 and other components, avoiding component wear and jamming. The upper part of the inner wall of the packing cylinder 7 is filled with sealing material to prevent gas from leaking from the connection between the valve stem 4 and the valve cover 2.

[0024] The bottom of the dust discharge trough 81 is arc-shaped. Because the bottom of the trough is arc-shaped, the accumulation of dust in the trough is reduced, which is more conducive to the discharge of dust and avoids the accumulation of dust in the guide sleeve. This reduces the interference of dust on the movement of valve stem 4 and further improves the dustproof and guiding performance of dustproof guide sleeve 8.

[0025] A pressure cylinder 14 is provided above the packing cylinder 7. The bottom end of the pressure cylinder 14 is nested inside the packing cylinder 7. The pressure cylinder 14 is slidably connected to the valve stem 4. The pressure cylinder 14 and the packing cylinder 7 are fixedly connected on the outer wall by a flange and bolts. The bolts are passed through the bolt holes of the flange that are fixedly connected to the outer wall of the pressure cylinder 14 and the outer wall of the packing cylinder 7. The pressure cylinder 14 is pressed down, thereby further compacting the sealing material filled in the upper part of the packing cylinder 7, enhancing the sealing effect, and effectively preventing gas from leaking from the gap between the valve stem 4 and the valve cover 2.

[0026] The support mechanism 11 includes two symmetrical connecting rods 111. One end of the connecting rod 111 is fixedly connected to the valve stem 4, and the other end is fixedly connected to an arc-shaped support block 112. The support block 112 is slidably connected to the inner wall of the valve body 1. Each support block 112 is fixedly connected to the valve plate 5 with a support rod 113. Two symmetrical reinforcing ribs 114 are fixedly connected between the support rod 113 and the valve plate 5. The support rod 113 transmits the supporting force of the support block 112 to the valve plate 5, providing a stable support foundation for the valve plate 5. The reinforcing ribs 114 enhance the connection strength between the support rod 113 and the valve plate 5. The two work together to effectively reduce the thermal deformation and thermal fatigue phenomena caused by the long-term operation of the valve plate 5 in a high-temperature environment.

[0027] An air inlet hood 12 is provided on the outside of the valve housing 1 where the air inlet 6 is located, and an air outlet hood 13 is provided on the outside of the valve housing 1 where the air outlet 9 is located. Flanges are fixedly connected to the outer walls of the air inlet hood 12 and the air outlet hood 13 at the ends away from the valve housing 1. The air inlet hood 12 is connected to the heat storage chamber of the incinerator by flanges and bolts, and the air outlet hood 13 is connected to the exhaust pipe.

[0028] Working principle:

[0029] The inlet hood 12 is tightly connected to the heat storage chamber of the incinerator using flanges and bolts. Simultaneously, the outlet hood 13 is connected to the exhaust pipe in the same manner, ensuring the stability of the gas flow path. After filling the upper part of the packing cylinder 7, which is fixedly connected to the valve cover 2, with sealing material, bolts are passed through the bolt holes of the flange fixedly connected to the outer wall of the pressure cylinder 14 and the outer wall of the packing cylinder 7. This causes the pressure cylinder to compact the sealing material inside the packing cylinder 7, thereby achieving a good sealing effect and preventing gas leakage.

[0030] Cylinder 3 drives valve stem 4 to move up and down linearly. Valve stem 4 is fixedly connected to valve plate 5. The movement of valve stem 4 causes valve plate 5 to move away from valve seat 10, realizing the opening and closing of the lifting valve, thereby controlling the flow and blocking of gas in the incinerator. During the up and down movement of valve stem 4, the dustproof guide sleeve 8 located at the lower part of the inner wall of the packing cylinder 7 provides guidance for valve stem 4, ensuring that valve stem 4 moves up and down stably in a predetermined linear direction. At the same time, the dust discharge grooves 81 distributed in a circular array on the inner wall of the dustproof guide sleeve 8 can effectively collect and discharge the fine dust that adheres to valve stem 4 due to the high temperature environment, greatly reducing the interference of dust on the movement of valve stem 4 and the wear on related components, and extending the service life of the lifting valve.

[0031] During the lifting and lowering of the valve stem 4, the support mechanism 11 enhances the connection strength between the valve plate 5 and the valve stem 4, effectively reducing the thermal deformation and thermal fatigue caused by the long-term operation of the valve plate 5 in a high-temperature environment, maintaining the sealing performance and smooth opening and closing of the valve plate 5, and ensuring the stable and efficient operation of the incinerator.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting valve for an incinerator, comprising a valve housing (1), a valve cover (2) mounted on the top of the valve housing (1), a cylinder (3) disposed above the valve cover (2), a valve stem (4) being drivenly connected to the cylinder (3), and a valve plate (5) mounted on the bottom of the valve stem (4), characterized in that: The valve housing (1) has an air inlet (6) on its side wall and an air outlet (9) on its bottom wall. A valve seat (10) is provided above the air outlet (9). A packing cylinder (7) is fixedly connected inside the valve cover (2). A dustproof guide sleeve (8) and sealing material are provided on the inner wall of the packing cylinder (7). A plurality of dust discharge grooves (81) are arranged in a circular array on the inner wall of the dustproof guide sleeve (8). The bottom of the dust discharge groove (81) is arc-shaped. The guide sleeve (8) is slidably connected to the valve stem (4). A support mechanism (11) is provided between the valve stem (4) and the valve plate (5).

2. The lifting valve for an incinerator according to claim 1, characterized in that: The packing cylinder (7) is fixedly connected to the center of the valve cover (2), and the two ends of the packing cylinder (7) are located on the upper and lower sides of the valve cover (2) respectively. The dustproof guide sleeve (8) is fixedly installed on the lower part of the inner wall of the packing cylinder (7), and the upper part of the inner wall of the packing cylinder (7) is filled with sealing material.

3. A lifting valve for an incinerator according to claim 2, characterized in that: A pressure cylinder (14) is provided above the packing cylinder (7). The bottom end of the pressure cylinder (14) is nested inside the packing cylinder (7). The pressure cylinder (14) is slidably connected to the valve stem (4). The pressure cylinder (14) and the packing cylinder (7) are fixedly connected on the outer wall by a flange and bolts.

4. A lifting valve for an incinerator according to claim 1, characterized in that: The support mechanism (11) includes two symmetrical connecting rods (111). One end of the connecting rod (111) is fixedly connected to the valve stem (4), and the other end is fixedly connected to an arc-shaped support block (112). The support block (112) is slidably connected to the inner wall of the valve shell (1). Each support block (112) and the valve plate (5) are fixedly connected to a support rod (113). The support rod (113) and the valve plate (5) are fixedly connected to two symmetrical reinforcing ribs (114).

5. A lifting valve for an incinerator according to claim 1, characterized in that: An air inlet cover (12) is provided on the outside of the valve housing (1) where the air inlet (6) is located, and an air outlet cover (13) is provided on the outside of the valve housing (1) where the air outlet (9) is located. Flanges are fixedly connected to the outer walls of the air inlet cover (12) and the air outlet cover (13) at the end away from the valve housing (1).

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