Coal-fired power plant ash conveying leakproof device
By installing a sealing structure with upper and lower protective shells at the flange connection, combined with limit pipes and alarm components, the problem of flange leakage during ash and slag transportation is solved, achieving the effect of timely detection and prevention of environmental pollution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI DONGJIANG CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-04-28
AI Technical Summary
During the ash and slag transportation process in coal-fired power plants, the aging of the sealing rings at the flange connections leads to leakage, and the leakage of ash and slag dust causes environmental pollution. Existing technologies are unable to detect and prevent this in a timely manner.
A sealing structure comprising an upper and lower protective shell was designed, combined with a limiting tube, a sealing plug, and an alarm component. The structure detects changes in leakage pressure and triggers an alarm to prevent ash and dust from entering the environment and to promptly notify personnel.
It effectively prevents ash and dust from leaking into the environment, reduces pollution, and promptly detects leak locations and notifies staff, thus improving the accuracy and efficiency of leak detection.
Smart Images
Figure CN224174985U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ash and slag conveying technology, and in particular to a leak-proof device for conveying ash and slag in coal-fired power plants. Background Technology
[0002] Coal-fired boilers continuously produce ash and slag during operation. To prevent the ash and slag from accumulating after being discharged from the boiler and causing environmental pollution, it is often necessary to transport and transfer the ash and slag. Currently, an air compressor can be used as a driving source to create positive pressure inside the pipeline during the transfer of ash and slag. The ash and slag are then pushed to the required location by the airflow.
[0003] Due to the long conveying distance, it is often necessary to connect two pipelines with flanges. When the pipeline is conveying ash and slag, positive pressure needs to be generated inside the pipeline. When the sealing ring at the flange connection becomes old and damaged, the pressure inside the pipeline will leak, and the dust of ash and slag will leak from the flange joint. If it is not detected in time, it will easily cause environmental pollution. Therefore, we propose a leakage prevention device for conveying ash and slag in coal-fired power plants. Utility Model Content
[0004] The main purpose of this utility model is to provide a leakage prevention device for conveying ash and slag in coal-fired power plants, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A leak-proof device for conveying ash and slag in a coal-fired power plant includes two conveying pipes, which are fixedly connected by flanges. A sealing ring is provided at the connection point of the two flanges. An upper protective shell and a lower protective shell are fitted onto the outer surface of the connection point of the two flanges, forming a space that seals the two flanges. A limiting tube is fixedly connected to the outer surface of the upper protective shell, and a sealing plug is slidably connected inside the limiting tube. A limiting rod is fixedly connected to the top of the sealing plug, and an alarm component for detecting gas leaks is provided on the outer surface of the limiting rod.
[0007] Preferably, the alarm component includes a push-button switch, a buzzer, and a battery, which are electrically connected by wires.
[0008] Preferably, a support rod is fixedly connected to the outer surface of the upper protective shell, and a protective baffle is fixedly connected to the end of the support rod away from the upper protective shell. The push-button switch, buzzer, and battery are all fixedly installed on the lower surface of the protective baffle.
[0009] Preferably, the two flanges are fixedly connected to the opposite sides of each other with a limiting frame, and the inner walls of the upper and lower protective shells are fixedly connected to a limiting plate, which is inserted into the inside of the limiting frame.
[0010] Preferably, sealing gaskets are fixedly connected to the sides of the upper and lower protective shells that are close to each other.
[0011] Preferably, the upper protective shell and the lower protective shell are fixedly connected by locking bolts.
[0012] Preferably, both sides of the upper and lower protective shells are provided with arc-shaped holes, and an arc-shaped rubber ring is provided inside the arc-shaped holes.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This coal-fired power plant ash and slag conveying leak prevention device, through the coordinated arrangement of conveying pipes, flanges, sealing rings, upper protective shells, lower protective shells, push-button switches, buzzers, and batteries, forms a sealed space at the flange connection by splicing the upper and lower protective shells. When a leak occurs at the flange connection, the leaked ash and slag dust is retained inside the upper and lower protective shells, preventing it from directly entering the external environment and causing air pollution. As the leak continues at the flange connection, the pressure inside the upper and lower protective shells increases, pushing the sealing plug upwards inside the limiting tube. This causes the limiting rod to move upwards, applying pressure to the push-button switch. When the push-button switch is activated, the buzzer sounds, triggering an alarm. Based on the alarm sound, staff can more quickly locate the leak. Attached Figure Description
[0015] Figure 1 This is an isometric structural diagram of an anti-leakage device for conveying ash and slag in a coal-fired power plant, according to Embodiment 1 of this utility model.
[0016] Figure 2 This is a bottom-view isometric structural diagram of an anti-leakage device for conveying ash and slag in a coal-fired power plant, according to Embodiment 1 of this utility model.
[0017] Figure 3 This is a cross-sectional isometric structural diagram of a leakage prevention device for conveying ash and slag in a coal-fired power plant, according to Embodiment 1 of this utility model.
[0018] Figure 4 This is a partially enlarged isometric structural diagram of a leak-proof device for conveying ash and slag in a coal-fired power plant, according to Embodiment 1 of this utility model.
[0019] Figure 5 This is a cross-sectional isometric structural diagram of the limiting pipe in a coal-fired power plant ash and slag conveying anti-leakage device according to Embodiment 1 of this utility model;
[0020] Figure 6 This invention relates to a leakage prevention device for conveying ash and slag in a coal-fired power plant, as described in Embodiment 1 of this utility model. Figure 3 Enlarged structural diagram at point B;
[0021] Figure 7 This invention relates to a leakage prevention device for conveying ash and slag in a coal-fired power plant, as described in Embodiment 1 of this utility model. Figure 1 Enlarged structural diagram at point A in the middle.
[0022] In the diagram: 1. Feed pipe; 2. Flange; 3. Sealing ring; 4. Upper protective shell; 5. Lower protective shell; 6. Limiting pipe; 7. Sealing plug; 8. Limiting rod; 9. Push button switch; 10. Buzzer; 11. Battery; 12. Support rod; 13. Protective baffle; 14. Limiting frame; 15. Limiting plate; 16. Sealing gasket; 17. Locking bolt; 18. Arc-shaped rubber ring. Detailed Implementation
[0023] 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.
[0024] Example 1
[0025] like Figure 1-7 As shown, a leakage prevention device for conveying ash and slag in a coal-fired power plant includes two conveying pipes 1, which are fixedly connected by flanges 2. The two flanges 2 are also fixedly connected by positioning bolts, which pass through the flanges 2 in sequence to secure them. A sealing ring 3 is provided at the connection point of the two flanges 2. An upper protective shell 4 and a lower protective shell 5 are fitted onto the outer surface of the connection point of the two flanges 2, forming a space that seals the two flanges 2. A limiting tube 6 is fixedly connected to the outer surface of the upper protective shell 4. The limiting tube 6 is hollow, and its bottom end is connected to the upper protective shell 4. A sealing plug 7 made of rubber is slidably connected inside the limiting tube 6. The sealing plug 7 contacts the inner wall of the limiting tube 6 to seal it. A limiting rod 8 is fixedly connected to the top of the sealing plug 7, and an alarm component for detecting gas leaks is provided on the outer surface of the limiting rod 8.
[0026] In practical use, through the coordinated arrangement of the conveying pipe 1, flange 2, sealing ring 3, upper protective shell 4, lower protective shell 5, push button switch 9, buzzer 10, and battery 11, this device, by splicing and assembling the upper protective shell 4 and lower protective shell 5, can form a sealed space at the connection of flange 2. When leakage occurs at the connection of flange 2, the leaked ash and dust will be retained inside the upper protective shell 4 and lower protective shell 5, preventing it from directly entering the external environment and causing air pollution. As leakage continues at the connection of flange 2, the pressure inside the upper protective shell 4 and lower protective shell 5 will increase, pushing the sealing plug 7 to slide upward inside the limiting tube 6. This causes the limiting rod 8 to move upward, which can apply pressure to the push button switch 9. When the push button switch 9 is turned on, the buzzer 10 will sound an alarm, allowing the staff to more quickly locate the leak based on the alarm sound.
[0027] In this embodiment, the alarm component includes a push-button switch 9, a buzzer 10, and a battery 11. The push-button switch 9, the buzzer 10, and the battery 11 are electrically connected by wires. When the push-button switch 9 is not pressed, the two contacts on the push-button switch 9 are in an open state, no current flows in the circuit, the oscillation circuit inside the buzzer 10 is not activated, and no sound is produced. When the push-button switch 9 is pressed, it pushes the internal spring to contact the contacts, which makes the two contacts conductive, and current flows in the circuit, which activates the oscillation circuit inside the buzzer 10, and the buzzer 10 produces a sound.
[0028] In practical use, the storage battery 11 can be a buzzer 10 and a push-button switch 9. When the push-button switch 9 is pressed, it becomes conductive, which can connect the circuit and make the buzzer 10 circuit conductive, thus emitting a buzzing alarm to remind the staff.
[0029] In this embodiment, a support rod 12 is fixedly connected to the outer surface of the upper protective shell 4, and a protective baffle 13 is fixedly connected to the end of the support rod 12 away from the upper protective shell 4. The push button switch 9, the buzzer 10 and the battery 11 are all fixedly installed on the lower surface of the protective baffle 13.
[0030] In practical use, the protective baffle 13 can provide installation positions for the push button switch 9, the buzzer 10 and the battery 11, making the push button switch 9, the buzzer 10 and the battery 11 more securely installed. The protective baffle 13 can also shield and protect the push button switch 9, the buzzer 10 and the battery 11, preventing debris from falling and damaging the push button switch 9, the buzzer 10 and the battery 11.
[0031] In this embodiment, the two flanges 2 are fixedly connected to the opposite sides of each other by a limiting frame 14, and the inner walls of the upper protective shell 4 and the lower protective shell 5 are fixedly connected to a limiting plate 15, which is inserted into the inside of the limiting frame 14.
[0032] In practical use, with the cooperation of the limiting plate 15 and the limiting frame 14, after the two flanges 2 are connected, the staff directly inserts the limiting plate 15 on the upper protective shell 4 and the lower protective shell 5 into the limiting frame 14, so that the installation position of the upper protective shell 4 and the lower protective shell 5 is more accurate, and the limiting plate 15 can tighten and limit the flanges 2, so that the two flanges 2 are not easy to separate.
[0033] In this embodiment, sealing gaskets 16 are fixedly connected to the sides of the upper protective shell 4 and the lower protective shell 5 that are close to each other. The upper protective shell 4 and the lower protective shell 5 are fixedly connected by locking bolts 17. Both the upper protective shell 4 and the lower protective shell 5 have threaded holes. When the locking bolts 17 are connected to the upper protective shell 4 and the lower protective shell 5, the locking bolts 17 are screwed into the threaded holes on the upper protective shell 4 and the lower protective shell 5. Then, a locking nut is threaded onto the locking bolts 17 to ensure the stability of the connection between the upper protective shell 4 and the lower protective shell 5.
[0034] In practical use, the sealing gasket 16 can be squeezed when the upper protective shell 4 and the lower protective shell 5 are spliced together, so that the upper protective shell 4 and the lower protective shell 5 are in closer contact and the resulting space has better sealing performance.
[0035] In this embodiment, both sides of the upper protective shell 4 and the lower protective shell 5 are provided with arc-shaped holes, and an arc-shaped rubber ring 18 is provided inside the arc-shaped holes.
[0036] In practical use, the arc-shaped rubber ring 18 allows for a tighter connection and better sealing effect when the upper protective shell 4 and the lower protective shell 5 come into contact with the conveying pipe 1.
[0037] Working principle: During installation, the staff can first fix the two flanges 2, then insert the limiting plates 15 on the upper protective shell 4 and the lower protective shell 5 into the limiting frame 14, and then use the locking bolts 17 to connect the upper protective shell 4 and the lower protective shell 5.
[0038] When a leak occurs at the flange 2 connection, the leaked ash and dust will remain inside the upper protective shell 4 and the lower protective shell 5, preventing it from directly entering the external environment and causing air pollution. As the leak continues at the flange 2 connection, the pressure inside the upper protective shell 4 and the lower protective shell 5 will increase, pushing the sealing plug 7 to slide upward inside the limiting tube 6. This causes the limiting rod 8 to move upward, which can apply pressure to the push button switch 9. When the push button switch 9 is turned on, the buzzer 10 will sound an alarm.
[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A leakage prevention device for conveying ash and slag in a coal-fired power plant, comprising two conveying pipes (1), the two conveying pipes (1) being fixedly connected by flanges (2), and a sealing ring (3) being provided at the connection point of the two flanges (2), characterized in that: An upper protective shell (4) and a lower protective shell (5) are fitted onto the outer surface of the connection between the two flanges (2). The upper protective shell (4) and the lower protective shell (5) form a space for sealing the two flanges (2). A limiting tube (6) is fixedly connected to the outer surface of the upper protective shell (4). A sealing plug (7) is slidably connected inside the limiting tube (6). A limiting rod (8) is fixedly connected to the top of the sealing plug (7). An alarm component for detecting gas leaks is provided on the outer surface of the limiting rod (8).
2. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 1, characterized in that: The alarm assembly includes a push-button switch (9), a buzzer (10), and a battery (11), which are electrically connected by wires.
3. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 2, characterized in that: A support rod (12) is fixedly connected to the outer surface of the upper protective shell (4). A protective baffle (13) is fixedly connected to the end of the support rod (12) away from the upper protective shell (4). The push button switch (9), buzzer (10) and battery (11) are all fixedly installed on the lower surface of the protective baffle (13).
4. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 1, characterized in that: Both flanges (2) are fixedly connected to a limiting frame (14) on their opposite sides. The inner walls of the upper protective shell (4) and the lower protective shell (5) are fixedly connected to a limiting plate (15), which is inserted into the inside of the limiting frame (14).
5. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 1, characterized in that: Both the upper protective shell (4) and the lower protective shell (5) have sealing gaskets (16) fixedly connected to each other on their adjacent sides.
6. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 1, characterized in that: The upper protective shell (4) and the lower protective shell (5) are fixedly connected by locking bolts (17).
7. The anti-leakage device for conveying ash and slag in a coal-fired power plant according to claim 1, characterized in that: Both sides of the upper protective shell (4) and the lower protective shell (5) are provided with arc-shaped holes, and an arc-shaped rubber ring (18) is provided inside the arc-shaped hole.