Desulfurization and denitrification expansion joint
By using a double-layer flexible compensation sleeve structure and detection auxiliary device, the leakage problem of non-metallic desulfurization and denitrification expansion joints was solved, enabling rapid detection and handling of gas leaks and improving sealing and safety.
Patent Information
- Application Number
- CN202423268550.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing non-metallic desulfurization and denitrification expansion joints are prone to damage and leakage during use, and are difficult to detect in a timely manner, leading to the leakage of toxic gases that pollute the environment, and there is also a risk of missed detection.
It adopts a double-layer flexible compensation sleeve structure, with the inner and outer flexible compensation sleeves forming a cavity. Combined with detection auxiliary devices, including a mounting base, sampling slot and pipette, it can quickly detect leaked gas.
It improves the sealing performance of expansion joints, prevents the leakage of harmful gases, and enables rapid detection and handling of leaked gases, ensuring environmental safety.
Smart Images
Figure CN223579311U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of expansion joints, specifically desulfurization and denitrification expansion joints. Background Technology
[0002] Expansion joints, also known as compensators, are components used to absorb axial, angular, and lateral displacements in pipelines or equipment caused by factors such as temperature changes, mechanical vibration, and settlement. They are usually made of metallic or non-metallic materials and have good flexibility and sealing performance. Desulfurization and denitrification expansion joints are mainly divided into two categories according to the main material used: non-metallic expansion joints and metallic expansion joints. However, non-metallic expansion joints are more widely used in desulfurization and denitrification projects because they are more flexible and have no reverse thrust.
[0003] Compared to metal expansion joints, non-metallic expansion joints have a shorter service life and lower strength, making them more prone to breakage and leakage. In desulfurization and denitrification systems, expansion joints need to be inspected and maintained regularly to prevent the leakage of toxic gases from the ducts and environmental pollution. Existing non-metallic desulfurization and denitrification collision joints typically use a single-layer non-metallic expansion body structure. When the expansion body experiences even minor damage, toxic fumes can directly escape into the outside air, making it difficult to detect in a timely manner and potentially leading to missed detections. This can result in leaks that cannot be dealt with promptly, harming the environment. Utility Model Content
[0004] This invention provides a desulfurization and denitrification expansion joint, which has the advantages of good sealing performance, high safety and convenient and quick leak detection, so as to solve the problems of existing expansion joints lacking leak protection and inconvenient and quick gas leak detection.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a desulfurization and denitrification expansion joint, comprising a connecting flange and a flexible compensation assembly fixed between the connecting flange, and further comprising a detection auxiliary device, wherein the detection auxiliary device includes a mounting base and a sampling assembly, wherein:
[0006] The flexible compensation component includes an outer flexible compensation sleeve and an inner flexible compensation sleeve, wherein the outer flexible compensation sleeve wraps around the outside of the inner flexible compensation sleeve and a cavity is formed between the two.
[0007] The mounting base is fixed to the side end of the connecting flange, the outer flexible compensation sleeve and the inner flexible compensation sleeve are fixed between the mounting base, and the mounting base is provided with a sampling groove;
[0008] The sampling assembly includes a pipette that passes through the mounting base and can extend into the sampling slot.
[0009] As a preferred embodiment of this utility model, the outer flexible compensation sleeve and the inner flexible compensation sleeve are respectively fixed on the outer and inner sides of the sampling groove, and the sampling groove is connected to the cavity formed by the outer flexible compensation sleeve and the inner flexible compensation sleeve.
[0010] As a preferred technical solution of this utility model, the sampling component further includes a hollow rubber head and a fixing cylinder. The fixing cylinder is fixed to the side of the mounting base and its two ends extend into the sampling groove and outside the mounting base, respectively. The suction tube is fixed to the front end of the hollow rubber head and communicates with the hollow rubber head.
[0011] As a preferred technical solution of this utility model, the outer wall of the end of the straw is provided with an external thread, and the inner wall of the fixed cylinder is provided with an internal thread on the side near the sampling groove. The straw and the fixed cylinder are connected by the external thread and the internal thread in a movable connection.
[0012] As a preferred embodiment of this utility model, a sealing gasket and an operating turntable are installed on the outer wall of the straw near the hollow rubber head, and the sealing gasket is movably connected to and cooperates with the fixed cylinder.
[0013] As a preferred technical solution of this utility model, a sealing groove is provided on the outside of the connecting flange, a sealing ring is placed in the sealing groove, and multiple limit buttons are installed in a circular arrangement at equal intervals on the bottom surface of the sealing groove.
[0014] As a preferred embodiment of this utility model, the outer wall of the connecting flange is equipped with multiple fixing ears, and the fixing ears between different connecting discs correspond to each other and are movably connected with calibration screws. The calibration screws pass through the fixing ears and are fixed between the fixing ears by nuts.
[0015] Compared with the prior art, the present invention provides a desulfurization and denitrification expansion joint, which has the following beneficial effects:
[0016] This invention utilizes a double-layer structure with an outer flexible compensation sleeve and an inner flexible compensation sleeve to improve the sealing performance of the expansion joint, preventing the leakage of harmful gases in the desulfurization and denitrification system after the single-layer flexible compensation sleeve is damaged. Furthermore, the double-layer structure can block leaked harmful gases between the outer and inner flexible compensation sleeves after the inner flexible compensation sleeve is damaged and leaks. During maintenance and inspection, the harmful gases between the outer and inner flexible compensation sleeves can be quickly removed, tested, and treated using a hollow rubber head and a suction tube. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a cross-sectional view of the internal structure of this utility model;
[0019] Figure 3 This is a diagram showing the internal structure of the mounting base of this utility model;
[0020] Figure 4 This is a schematic diagram of the sampling component structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the connecting flange structure of this utility model.
[0022] In the diagram: 1. Connecting flange; 11. Sealing groove; 12. Limit button; 13. Sealing ring; 14. Alignment screw; 15. Fixing lug; 2. Flexible compensation component; 21. Outer flexible compensation sleeve; 22. Inner flexible compensation sleeve; 3. Detection auxiliary device; 31. Mounting base; 311. Sampling slot; 32. Sampling component; 321. Hollow rubber head; 322. Fixing cylinder; 323. Internal thread; 324. Operating turntable; 325. Suction tube; 326. External thread; 327. Sealing gasket. 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. Example 1
[0024] Please refer to the appendix. Figure 1-5 The desulfurization and denitrification expansion joint includes a connecting flange 1 and a flexible compensation component 2 fixed between the connecting flange 1, and also includes a detection auxiliary device 3. The detection auxiliary device 3 includes a mounting base 31 and a sampling component 32, wherein:
[0025] The flexible compensation component 2 includes an outer flexible compensation sleeve 21 and an inner flexible compensation sleeve 22. The outer flexible compensation sleeve 21 wraps around the outer side of the inner flexible compensation sleeve 22 and a cavity is formed between the two.
[0026] The mounting base 31 is fixed to the side end of the connecting flange 1, the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22 are fixed between the mounting base 31, and the mounting base 31 is provided with a sampling groove 311;
[0027] The sampling component 32 includes a pipette 325 that passes through the mounting base 31 and can extend into the sampling slot 311.
[0028] Please refer to the appendix. Figure 2 The outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22 are respectively fixed on the outer and inner sides of the sampling groove 311, and the sampling groove 311 is connected to the cavity formed by the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22.
[0029] When the inner flexible compensation sleeve 22 is damaged and leaks, the leaked flue gas will enter the cavity between the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22, and will not leak outside the expansion joint. As the flue gas continues to leak, the flue gas concentration between the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22 will continuously increase and enter the sampling tank 311.
[0030] Please refer to the appendix. Figure 3 , Figure 4 The sampling assembly 32 further includes a hollow rubber head 321 and a fixed cylinder 322. The fixed cylinder 322 is fixed to the side of the mounting base 31 and its two ends extend into the sampling groove 311 and out of the mounting base 31, respectively. The pipette 325 is fixed to the front end of the hollow rubber head 321 and communicates with the hollow rubber head 321. The outer wall of the end of the pipette 325 is provided with an external thread 326. The inner wall of the fixed cylinder 322 is provided with an internal thread 323 on the side near the sampling groove 311. The pipette 325 and the fixed cylinder 322 are movably connected by the external thread 326 and the internal thread 323.
[0031] When the hollow rubber head 321 is flattened and then released, it expands and recovers due to air pressure and material. At the same time, the hollow rubber head 321 draws the flue gas in the sampling slot 311 into the hollow rubber head 321 through the straw 325.
[0032] Furthermore, a sealing gasket 327 and an operating turntable 324 are installed on the outer wall of the straw 325 near the hollow rubber head 321. The sealing gasket 327 is movably connected to and cooperates with the fixed cylinder 322.
[0033] By operating the turntable 324 to rotate the suction tube 325, the suction tube 325 can be easily unscrewed from the fixed cylinder 322, thereby facilitating the detection of the smoke composition inside the hollow rubber head 321. Example 2
[0034] Based on the above embodiments, please refer to the appendix. Figure 5 The outer side of the connecting flange 1 is provided with a sealing groove 11, and a sealing ring 13 is placed in the sealing groove 11. Multiple limit buttons 12 are installed in a circular arrangement at equal intervals on the bottom surface of the sealing groove 11. Multiple fixing ears 15 are installed on the outer wall of the connecting flange 1. The fixing ears 15 between different connecting discs correspond to each other and are movably connected to a calibration screw 14. The calibration screw 14 passes through the fixing ears 15 and is fixed between the fixing ears 15 by a nut.
[0035] In this embodiment, the calibration screw 14 does not have a compensation function. It is only used to keep the expansion joint fixed during transportation to prevent the expansion joint from being stretched and damaged. After the expansion joint is connected, the sealing ring 13 is squeezed into the sealing groove 11. At the same time, the limiting button 12 in the sealing groove 11 squeezes the pressure end face of the sealing ring 13. When the pipeline vibrates, the limiting button 12 squeezes and limits the sealing ring 13 to prevent the sealing ring 13 and the end face of the sealing ring 13 facing the sealing groove 11 from being affected by vibration and rubbing against the sealing groove 11, which would lead to sealing failure.
[0036] The operating process or principle of this utility model is as follows: After placing the sealing ring 13 into the sealing groove 11 on the connecting flange 1, the connecting flange 1 is fitted to the pipeline and connected to the pipeline through the flange to complete the installation of the expansion joint. When the flue gas passes through the expansion joint during the operation of the desulfurization and denitrification system, the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22 can compensate for the displacement caused by temperature changes, mechanical vibration and foundation settlement when the flue gas passes through the pipeline system. The flue gas passes through the inner flexible compensation sleeve 22. When the inner flexible compensation sleeve 22 is damaged and leakage occurs, the leaked flue gas will enter the cavity between the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22, and will not leak. As the flue gas continues to leak out of the expansion joint, the flue gas concentration between the outer flexible compensation sleeve 21 and the inner flexible compensation sleeve 22 continuously increases and enters the sampling groove 311. When the staff performs regular maintenance and inspection on the expansion joint, the hollow rubber head 321 is flattened and then released. At this time, the hollow rubber head 321 expands and recovers due to air pressure and material. At the same time, the flue gas in the sampling groove 311 is sucked into the hollow rubber head 321 through the suction tube 325. Then, by operating the turntable 324 to rotate the suction tube 325 counterclockwise, the suction tube 325 is unscrewed from the fixed cylinder 322, and the flue gas composition at the fixed cylinder 322 or in the hollow rubber head 321 can be detected.
Claims
1. A desulfurization and denitrification expansion joint, comprising a connecting flange (1) and a flexible compensation assembly (2) fixed between the connecting flange (1), characterized in that, It also includes a detection auxiliary device (3), which includes a mounting base (31) and a sampling component (32), wherein: The flexible compensation component (2) includes an outer flexible compensation sleeve (21) and an inner flexible compensation sleeve (22), wherein the outer flexible compensation sleeve (21) wraps around the outer side of the inner flexible compensation sleeve (22) and a cavity is formed between the two; The mounting base (31) is fixed to the side end of the connecting flange (1), the outer flexible compensation sleeve (21) and the inner flexible compensation sleeve (22) are fixed between the mounting base (31), and the mounting base (31) is provided with a sampling groove (311). The sampling assembly (32) includes a pipette (325) that passes through the mounting base (31) and can extend into the sampling slot (311).
2. The desulfurization and denitrification expansion joint according to claim 1, characterized in that: The outer flexible compensation sleeve (21) and the inner flexible compensation sleeve (22) are respectively fixed on the outer side and the inner side of the sampling groove (311), and the sampling groove (311) is connected to the cavity formed by the outer flexible compensation sleeve (21) and the inner flexible compensation sleeve (22).
3. The desulfurization and denitrification expansion joint according to claim 2, characterized in that: The sampling assembly (32) also includes a hollow rubber head (321) and a fixing cylinder (322). The fixing cylinder (322) is fixed to the side of the mounting base (31) and its two ends extend into the sampling groove (311) and outside the mounting base (31), respectively. The suction tube (325) is fixed to the front end of the hollow rubber head (321) and communicates with the hollow rubber head (321).
4. The desulfurization and denitrification expansion joint according to claim 3, characterized in that: The outer wall of the end of the straw (325) is provided with an external thread (326), and the inner wall of the fixed cylinder (322) is provided with an internal thread (323) on the side near the sampling groove (311). The straw (325) and the fixed cylinder (322) are connected by the external thread (326) and the internal thread (323).
5. The desulfurization and denitrification expansion joint according to claim 4, characterized in that: A sealing gasket (327) and an operating turntable (324) are installed on the outer wall of the straw (325) near the hollow rubber head (321). The sealing gasket (327) is movably connected to and cooperates with the fixed cylinder (322).
6. The desulfurization and denitrification expansion joint according to claim 1, characterized in that: The connecting flange (1) is provided with a sealing groove (11) on the outside, and a sealing ring (13) is placed in the sealing groove (11). Multiple limit buttons (12) are installed in a circular arrangement at equal intervals on the bottom surface of the sealing groove (11).
7. The desulfurization and denitrification expansion joint according to claim 6, characterized in that: The outer wall of the connecting flange (1) is equipped with multiple fixing ears (15). The fixing ears (15) between different connecting discs correspond to each other and are movably connected with calibration screws (14). The calibration screws (14) pass through the fixing ears (15) and are fixed between the fixing ears (15) by nuts.