Anti-backfire type garbage incinerator feed inlet sealing assembly

Abstract

This utility model relates to a sealing component, providing a backfire-proof sealing component for the feed inlet of a waste incinerator, including a heat insulation cover and a storage pipe. The heat insulation cover is internally connected to the incinerator's internal space, and the storage pipe is mounted on the heat insulation cover. The storage pipe has a transition channel inside, and during installation, its lower end extends into the incinerator. This utility model establishes a dynamic sealing barrier by installing a storage pipe at the feed inlet of the waste incinerator and setting rotating gates and upper gates at both ends of the storage pipe. During the feeding phase, the upper gate opens, and the rotating gates close the lower end to receive the waste. After feeding is complete, the upper gate immediately closes, and the rotating gates then open to allow the waste to fall into the incinerator. This maintains at least one physical barrier throughout the material transfer process, preventing the reverse propagation of high-temperature flames and harmful gases within the incinerator, while also preventing sparks from splashing out due to pressure fluctuations during feeding. This ensures operational safety and maintains stable negative pressure in the incineration system.

Description

Technical Field

[0001] This utility model relates to a sealing component, and more particularly to a backfire-proof waste incinerator feed inlet sealing component. Background Technology

[0002] Waste incinerator feed inlets typically employ fixed gate valves or one-way flap valves, allowing material feeding via simple mechanical opening and closing. These structures are usually machined directly from cast iron or heat-resistant steel plates, relying on the planar pressing of the gate and valve seat to form a static seal. During feeding, the gate must be fully opened to allow the waste to fall freely into the furnace. At this time, the high-temperature flue gas inside the furnace can easily overflow through the open feed inlet, posing a significant risk of flame backflow.

[0003] This type of traditional sealing structure has three main drawbacks: First, the opening and closing process of a single gate inevitably involves a transition period of complete openness, making it impossible to achieve physical isolation throughout the feeding process; second, the rigid sealing surface is prone to thermal deformation under high-temperature conditions, resulting in poor sealing and frequent maintenance; and finally, flap valve structures often fail to close properly due to garbage blockage, requiring additional pneumatic auxiliary devices, which increases energy consumption and reduces system reliability. These drawbacks make the traditional feed inlet a weak link in the safe operation of the incineration system. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a backfire-proof waste incinerator feed inlet sealing component.

[0005] The technical implementation scheme of this utility model is as follows: A backfire-proof waste incinerator inlet sealing assembly includes a heat insulation cover, a storage pipe, an upper gate, a first hydraulic cylinder, a rotating gate, a rotating rod, a push rod, and a second hydraulic cylinder. The heat insulation cover is connected to the internal space of the incinerator. A storage pipe is installed on the heat insulation cover, and a transition channel is provided inside the storage pipe. During installation, the lower end of the storage pipe extends into the incinerator. An upper gate is rotatably hinged to the upper end of the storage pipe, which is used to close the upper end of the storage pipe. A first hydraulic cylinder is hinged to the upper part of the storage pipe, and the end of the hydraulic rod of the first hydraulic cylinder is hinged to the upper gate. The upper gate is opened and closed by the first hydraulic cylinder. The upper part of the storage pipe is equipped with... Two rotating rods extend outward from inside the insulation hood, and a rotating gate is fixedly connected between them. The lower part of the rotating gate slides in contact with the lower end of the storage pipe, sealing the lower opening of the storage pipe through the rotating gate. Push rods are fixedly connected to each rotating rod, and the push rods are located outside the insulation hood. Two hydraulic cylinders are hinged to the insulation hood, and the hydraulic rod of each hydraulic cylinder is hinged to the end of a push rod. The hydraulic cylinder pushes the push rod to swing, thereby causing the rotating rod to rotate, which in turn drives the rotating gate to open or close. The upper gate and the rotating gate seal the transition channel inside the storage pipe, forming a sealed buffer silo inside the storage pipe for temporarily storing the waste to be incinerated.

[0006] Furthermore, it also includes pressure sensors, sealing airbags, and air inlet valves. Multiple pressure sensors are installed on the heat insulation cover, and the detection ends of the pressure sensors extend into the heat insulation cover. An airflow channel is provided inside the upper gate, and a sealing groove is provided at the upper port of the storage pipe. A sealing airbag is provided in the area corresponding to the sealing groove on the upper gate. The sealing airbag is connected to the airflow channel inside the upper gate. An air inlet valve is provided on the upper gate, and the air inlet valve is connected to the airflow channel. The pressure sensors are connected to the air inlet valve for signal transmission.

[0007] Furthermore, it also includes an inlet valve, a cooling pipe is installed inside the upper gate, and an inlet valve is installed on the upper gate, with the inlet valve connected to and communicating with the cooling pipe.

[0008] Furthermore, it also includes an inspection hole and a lens; the upper gate has an inspection hole, and a lens is installed inside the inspection hole.

[0009] Furthermore, the inner wall of the insulation cover is equipped with a heat insulation layer made of ceramic fiber or aerogel material, which greatly reduces the heat conduction to the outside.

[0010] This utility model has the following advantages: 1. This utility model sets up a storage pipe at the feeding port of the waste incinerator, and sets up a rotating gate and an upper gate at both ends of the storage pipe to form a dynamic sealing barrier. During the feeding stage, the upper gate is opened and the rotating gate is closed to receive the waste. After the feeding is completed, the upper gate is immediately closed and the rotating gate is rotated open to let the waste fall into the incinerator. At least one physical isolation is maintained throughout the material transfer process, which effectively blocks the reverse propagation of high temperature flames and harmful gases in the incinerator. At the same time, it avoids sparks splashing out due to air pressure fluctuations during the feeding process, which not only ensures operational safety but also maintains the negative pressure stability of the incineration system.

[0011] 2. The airbag-type sealing component installed at the upper pipe opening of this utility model automatically forms a flexible sealing interface when the upper gate is closed through the synergistic action of the elastic sealing body and the dynamic pressurization module. By adaptively compensating for gap changes caused by thermal deformation or mechanical vibration, it effectively blocks the backflow of high-temperature flue gas and flame, ensuring the reliability of long-term sealing. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a three-dimensional structural diagram of the material storage tube and rotating gate components of this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the upper gate and the rotating gate of this utility model after they have been rotated.

[0015] Figure 4This is a three-dimensional structural diagram of the components of this utility model, including the upper gate, air inlet valve, and liquid inlet valve.

[0016] In the attached diagrams: 1: Insulation cover, 2: Storage pipe, 3: Upper gate, 31: Hydraulic cylinder one, 4: Rotary gate, 40: Rotating rod, 41: Push rod, 42: Hydraulic cylinder two, 6: Sealing airbag, 61: Air inlet valve, 601: Sealing groove, 7: Liquid inlet valve, 8: Pressure sensor, 9: Inspection hole, 91: Lens. Detailed Implementation

[0017] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0018] Example 1

[0019] A backfire-proof waste incinerator feed inlet sealing assembly, such as Figure 1-4 As shown, the system includes a heat insulation cover 1, a storage pipe 2, an upper gate 3, a hydraulic cylinder 31, a rotating gate 4, a rotating rod 40, a push rod 41, and a second hydraulic cylinder 42. The heat insulation cover 1 is installed at the feed inlet of the incinerator, and its interior is connected to the internal space of the incinerator. Its main function is to isolate the high-temperature area and prevent the external environment from being affected by high temperatures. It also provides a mounting base for other components. The inner wall of the heat insulation cover 1 is provided with a heat insulation layer made of ceramic fiber or aerogel material, which significantly reduces heat conduction to the outside and reduces the overall energy consumption of the incineration equipment. To improve energy efficiency, ceramic fiber or aerogel materials have excellent thermal insulation and high temperature resistance properties, and can maintain good stability and durability even under extreme working conditions, providing a solid guarantee for the entire backfire-proof waste incinerator inlet sealing assembly; the insulation cover 1 is equipped with a storage pipe 2, which has a transition channel inside, for temporary storage of waste after it enters from the top and discharges it into the incinerator from the bottom. When the storage pipe 2 is installed, its lower pipe end will extend into the incinerator to ensure that the waste can fall directly into the incinerator.

[0020] An upper gate 3 is rotatably hinged at the upper opening of the storage pipe 2. The upper gate 3 is installed by hinge, which can realize flexible opening and closing action, thereby sealing the upper opening of the storage pipe 2. The upper gate 3 is used to prevent the high temperature gas in the incinerator from flowing back upward. At the same time, after feeding is completed, the upper gate 3 is quickly closed to form the first sealing barrier. A hydraulic cylinder 31 is hinged to the upper part of the storage pipe 2. The end of the hydraulic rod of the hydraulic cylinder 31 is hinged to the upper gate 3. The upper gate 3 is opened and closed by the hydraulic cylinder 31. The hydraulic cylinder 31 serves as a power source. By utilizing the stability and efficiency of hydraulic transmission, the opening and closing action of the upper gate 3 is ensured to be accurate and reliable, further improving the safety and automation of equipment operation.

[0021] The upper part of the storage pipe 2 is equipped with two rotating rods 40, and a rotating gate 4 is fixedly connected between the rotating rods 40. The lower part of the rotating gate 4 slides in contact with the lower end of the storage pipe 2, and the lower opening of the storage pipe 2 is sealed by the rotating gate 4. The design of the rotating gate 4 ingeniously realizes a second sealing function. When the upper gate 3 is opened for feeding, the rotating gate 4 remains closed to prevent high-temperature gas in the incinerator from flowing back into the upper space through the storage pipe 2. After feeding is completed, the upper gate 3 is closed, and the rotating gate 4 can smoothly send the waste into the incinerator through a specific opening action, thereby realizing double backfire protection during the feeding process.

[0022] Each rotating rod 40 is fixedly connected to a push rod 41. The rotating rod 40 extends outward from inside the heat insulation cover 1, and the push rod 41 is located outside the heat insulation cover 1. This structural design allows the drive component to be installed outside the heating area, avoiding damage to the drive component from high temperature and reducing the impact of high temperature on the drive mechanism.

[0023] Two hydraulic cylinders 42 are hinged to the heat insulation cover 1. The hydraulic rod of each hydraulic cylinder 42 is hinged to the end of a push rod 41. The hydraulic cylinders 42 synchronously push the push rod 41 to swing, thereby causing the rotating rod 40 to rotate, which in turn drives the rotating gate 4 to open or close. The introduction of the hydraulic cylinders 42 not only provides strong driving force, but also ensures the smoothness and accuracy of the rotating gate 4's operation, avoiding problems such as waste residue or seal failure due to operational errors. Through the coordinated operation of the upper gate 3 and the rotating gate 4, the transition channel in the storage pipe 2 can be completely sealed, forming a sealed buffer bin in the storage pipe 2 for temporarily storing the waste to be incinerated. This double-gate design significantly improves the equipment's sealing. The sealing performance and backfire prevention capabilities ensure the safety and reliability of the entire feeding process, while reducing the impact of high-temperature gas leakage on the surrounding environment and improving the efficiency and environmental friendliness of waste incineration. Specifically, the alternating opening and closing of the rotary gate 4 and the upper gate 3 form a dynamic sealing barrier: during the feeding stage, the upper gate 3 is opened and the rotary gate 4 closes the lower pipe to receive the waste. After feeding is completed, the upper gate 3 is closed, and then the rotary gate 4 is rotated open to allow the waste to fall into the incinerator. At least one physical isolation is maintained throughout the material transfer process, effectively blocking the reverse propagation of high-temperature flames and harmful gases in the incinerator, while avoiding sparks from splashing out due to air pressure fluctuations during the feeding process. This ensures both operational safety and maintains the negative pressure stability of the incineration system.

[0024] Example 2

[0025] Based on Example 1, such as Figure 1-4 As shown, it also includes pressure sensors 8, sealing airbags 6, and inlet valves 61. Multiple pressure sensors 8 are installed on the insulation cover 1, with the detection ends of the sensors extending into the insulation cover to monitor pressure changes inside the insulation cover 1 in real time. If an abnormal pressure is detected, such as the possibility of high-temperature gas in the incinerator flowing back into the external space through the storage pipe 2, the pressure sensors 8 will immediately send a signal. The upper end of the storage pipe 2 is provided with a sealing groove 601, and a sealing airbag 6 is installed in the area corresponding to the sealing groove 601 on the upper gate 3. An airflow channel is provided inside the upper gate 3, and this airflow channel connects with… The sealing airbag 6 is connected to the upper gate 3 and is located in the area of ​​the sealing groove 601 at the upper port of the storage pipe 2. When the pressure sensor 8 detects an abnormal pressure, it connects with the air inlet valve 61 and automatically controls the air inlet valve 61 to open and inflate the airflow channel. This causes the sealing airbag 6 to expand and fit tightly against the sealing groove 601, forming a highly efficient and reliable dynamic sealing barrier. This design significantly improves the sealing performance of the equipment, preventing high-temperature gas leakage and effectively avoiding the impact of external pressure fluctuations on the stability of equipment operation.

[0026] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, it also includes an inlet valve 7. Cooling pipes are arranged inside the upper gate 3. When arranged, they do not interfere with the airflow channel. The upper gate 3 is equipped with an inlet valve 7, which is connected to and communicates with the cooling pipes. By injecting cooling medium (such as cooling water or refrigerant) into the cooling pipes, the surface temperature of the upper gate 3 in high-temperature environments can be effectively reduced, thereby protecting the overall structure of the upper gate 3 and the components installed on it, reducing high-temperature damage, and extending the service life of the equipment.

[0027] In addition, such as Figure 1 and Figure 4 As shown, it also includes an inspection hole 9 and a lens 91. The inspection hole 9 is provided on the upper gate 3. The other end of the inspection hole 9 is connected to the internal space of the storage tube 2. The lens 91 is installed on the inspection hole 9. The operator can directly observe the waste storage status in the storage tube 2 and the operation of the rotating gate 4 through the lens 91 without opening the upper gate 3. This non-contact observation method not only facilitates daily maintenance and troubleshooting, but also effectively reduces the risk of seal failure caused by frequent opening and closing of the upper gate 3, and improves the safety and reliability of equipment operation.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A backfire-proof waste incinerator feed inlet sealing assembly, comprising a heat insulation cover (1), wherein the interior of the heat insulation cover (1) is in communication with the interior space of the incinerator; The application is characterized in that It also includes a storage pipe (2), an upper gate (3), a hydraulic cylinder (31), a rotating gate (4), a rotating rod (40), a push rod (41), and a hydraulic cylinder (2) (42). The storage pipe (2) is installed on the heat insulation cover (1). A transition channel is provided inside the storage pipe (2). When the storage pipe (2) is installed, its lower pipe end will extend into the incinerator. The upper pipe end of the storage pipe (2) is rotatably hinged to the upper pipe end. The upper gate (3) is used to close the upper pipe end of the storage pipe (2). The upper part of the storage pipe (2) is hinged to the hydraulic cylinder (31). The end of the hydraulic rod of the hydraulic cylinder (31) is hinged to the upper gate (3). The upper gate (3) is opened and closed by the hydraulic cylinder (31). The upper part of the storage pipe (2) is provided with two rotating rods (40). The rotating rods (40) both extend outward from inside the heat insulation cover (1). A rotating gate (4) is fixedly connected between the two sections. The lower part of the rotating gate (4) slides in contact with the lower end of the storage pipe (2). The lower opening of the storage pipe (2) is closed by the rotating gate (4). A push rod (41) is fixedly connected to each of the rotating rods (40). The push rods (41) are located outside the heat insulation cover (1). Two hydraulic cylinders (42) are hinged on the heat insulation cover (1). The hydraulic rod of each hydraulic cylinder (42) is hinged to the end of a push rod (41). The push rod (41) is pushed to swing by the hydraulic cylinder (42), which in turn causes the rotating rod (40) to rotate, thereby driving the rotating gate (4) to open or close. The transition channel in the storage pipe (2) is closed by the upper gate (3) and the rotating gate (4), forming a sealed buffer silo in the storage pipe (2) for temporarily storing the waste that needs to be incinerated.

2. The backfire-proof waste incinerator inlet sealing assembly according to claim 1, characterized in that: It also includes a pressure sensor (8), a sealing airbag (6) and an air inlet valve (61). Multiple pressure sensors (8) are provided on the heat insulation cover (1). The detection end of the pressure sensor (8) extends into the heat insulation cover (1). An airflow channel is provided in the upper gate (3). A sealing groove (601) is provided at the upper port of the storage pipe (2). A sealing airbag (6) is provided in the area corresponding to the sealing groove (601) on the upper gate (3). The sealing airbag (6) is connected to the airflow channel in the upper gate (3). An air inlet valve (61) is provided on the upper gate (3). The air inlet valve (61) is connected to the airflow channel. The pressure sensor (8) and the air inlet valve (61) are connected to each other.

3. A backfire-proof waste incinerator inlet sealing assembly according to claim 2, characterized in that: It also includes an inlet valve (7), a cooling pipe is installed inside the upper gate (3), and an inlet valve (7) is installed on the upper gate (3). The inlet valve (7) is connected to and communicates with the cooling pipe.

4. A backfire-proof waste incinerator inlet sealing assembly according to claim 3, characterized in that: It also includes an inspection hole (9) and a lens (91). The upper gate (3) has an inspection hole (9) and a lens (91) is installed inside the inspection hole (9).

5. A backfire-proof waste incinerator inlet sealing assembly according to claim 4, characterized in that: The inner wall of the heat insulation cover (1) is provided with a heat insulation layer made of ceramic fiber or aerogel material, which greatly reduces the heat conduction to the outside.

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