Multifunctional glass-lined manhole
The multifunctional glass-lined manhole design with integrated sight glass hand hole and manhole adopts the combination of tempered borosilicate sight glass and protective ring to solve the problems of sight glass damage and sealing gasket failure, thus improving the protection and sealing of the sight glass and reducing maintenance costs.
Patent Information
- Application Number
- CN202423161554.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The existing glass-lined manhole with sight glass is easily damaged during frequent opening, and the hand hole and sight glass hole cannot be integrated, resulting in frequent failure of the sealing gasket and increased economic losses.
A multifunctional glass-lined manhole is designed, which integrates a sight glass hand hole and a manhole. It uses tempered borosilicate sight glass combined with a glass-lined sight glass protection ring. It is fixed with quick-opening bolts and nuts, equipped with an O-ring seal, a protection ring and a power assist device to ensure that the sight glass is not damaged, while providing quick opening and closing functions.
It protects the sight glass, reduces the risk of damage, improves sealing and service life, meets the needs of different working conditions, and reduces maintenance costs.
Smart Images

Figure CN223479876U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of multifunctional enameled glass manhole technology, and in particular to a multifunctional enameled glass manhole. Background Technology
[0002] Existing enameled manholes with sight glasses are mostly designed according to HG / 2055.2-2019. The sight glass on the manhole cover is directly sealed to the enameled pipe opening. Frequent opening and closing of the sight glass can easily damage it. This type of manhole can only be opened by loosening the clips; repeated opening will cause the main sealing gasket to fail, requiring frequent gasket replacement and resulting in economic losses. In actual equipment use, most manhole openings do not require personnel to enter the equipment, but only require extending an arm into the equipment to inspect the enamel. In such cases, a single manhole is sufficient.
[0003] So how do we integrate the manhole, handhole, and sight glass into one unit, while protecting the sight glass from damage during frequent opening and closing? The ability to open and close quickly is the challenge we need to solve; therefore, we propose a multi-functional enameled glass manhole to address this problem. Utility Model Content
[0004] The purpose of this utility model is to provide a multifunctional enameled glass manhole to solve the problems mentioned in the background art.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A multifunctional enameled manhole includes: a clip bracket, an enameled manhole high-neck flange, and a manhole cover. The clip bracket is disposed on one side of the manhole cover. A groove is formed inside the manhole cover, and a sealing gasket is placed inside the groove. A sight glass handhole is placed on top of the sealing gasket. A tempered borosilicate sight glass is disposed inside the sight glass handhole. An enameled sight glass protective ring is fixedly installed at the bottom of the tempered borosilicate sight glass. The outer side of the enameled sight glass protective ring is disposed inside the manhole cover. The sight glass handhole and the manhole cover are fixedly fastened by quick-release bolts and nuts. Handles are fixedly installed on both sides of the sight glass handhole.
[0007] Preferably, one side of the manhole cover is provided with a gasket with a fixing plate, the side with the gasket with the fixing plate is provided with a manhole protection ring, and the side of the manhole protection ring is provided with a gasket. The manhole protection ring and the gasket are provided on the side of the high-neck flange of the glass-lined manhole.
[0008] Preferably, a clip is rotatably mounted on one side of the clip with a fixing pad, one side of the clip pendant is inserted into the lower ring of the clip, and one side of the clip is movably abutting against the outside of the pad and the manhole protective ring.
[0009] Preferably, a clamp is fixedly installed on one side of the manhole cover with a fixing pad, and the clamp is fixedly installed inside the manhole cover.
[0010] Preferably, an anti-tipping round steel bar is fixedly installed on one side of the top of the manhole cover.
[0011] Preferably, an opening assist device is provided on one side of the clip.
[0012] This utility model describes a multifunctional enameled glass manhole that, through a sight glass with a protective ring, a quick-opening handhole, and a manhole with an assist device, ensures the needs of different operating conditions. The sight glass with a protective ring is embedded in the protective ring, and there are gaskets on both sides for cushioning, making the protective ring and the sight glass cover an integrated unit. Even with frequent opening, the sight glass will not be damaged. A quick-opening handhole is embedded in the enameled glass manhole cover, and the two are sealed with a PTFE sealing gasket with an O-ring. The main body of this gasket is made of PTFE skeleton, and the inner and outer sides are reinforced with O-rings for sealing. Fins are also machined at the contact point with the pipe opening to prevent material splashing, making this structure robust, safe, durable, and easily replaceable.
[0013] In this utility model, a multifunctional enamel manhole is provided. It features a protective ring, an assist device, and a clip-on hanger, which facilitates production while protecting the equipment body. The manhole can be fixed to the manhole cover with a fixing plate and gasket, and will not fall off when the manhole cover is opened, preventing the manhole cover from colliding with the protective ring and damaging the enamel. At the same time, the manhole cover is pre-installed with quick-opening bolts and nuts, which can be manually opened, and is equipped with anti-tipping round steel to prevent the sight glass handhole from colliding with the manhole cover. Attached Figure Description
[0014] Figure 1 This is a diagram showing the usage status of a general-purpose enameled glass sight glass manhole;
[0015] Figure 2 This is a diagram showing the usage status of a multi-functional enameled manhole with a quick-opening sight glass.
[0016] Figure 3 This is a schematic diagram of the manhole cover, sight glass handhole, and handle proposed in this utility model.
[0017] Figure 4 This is a structural schematic diagram of the sight glass handhole and manhole opening states proposed in this utility model.
[0018] Figure 5 This is a schematic diagram of the structure of the present invention, which includes a fixing plate gasket and a sealing gasket.
[0019] In the diagram: 1. Clip hanger; 2. Clip; 3. Gasket; 4. Manhole protective ring; 5. Gasket with fixing plate; 6. Manhole cover; 7. Quick-opening bolt and nut; 8. Sight glass handhole; 9. Sealing washer; 10. Opening assist device; 11. Hook; 12. Clamp; 13. Enameled glass sight glass protective ring; 14. Tempered borosilicate sight glass; 15. Handle; 16. Anti-tipping round steel. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Reference Figure 1-5 A multifunctional enameled manhole includes: a clip hanger 1, an enameled manhole high-neck flange, and a manhole cover 6. The clip hanger 1 is disposed on one side of the manhole cover 6. A groove is opened inside the manhole cover 6, and a sealing gasket 9 is placed inside the groove. A sight glass handhole 8 is placed on top of the sealing gasket 9. A tempered borosilicate sight glass 14 is disposed inside the sight glass handhole 8. An enameled sight glass protective ring 13 is fixedly installed at the bottom of the tempered borosilicate sight glass 14. The outer side of the enameled sight glass protective ring 13 is disposed inside the manhole cover 6. The sight glass handhole 8 and the manhole cover 6 are fixedly fixed by quick-release bolts and nuts 7. Handles 15 are fixedly installed on both sides of the sight glass handhole 8.
[0022] In this embodiment, a manhole cover 6 is provided with a gasket 5 with a fixing plate on one side, a manhole protection ring 4 is provided on the side with the gasket 5, and a gasket 3 is provided on the side with the manhole protection ring 4. The manhole protection ring 4 and the gasket 3 are provided on the side of the high-neck flange of the glass-lined manhole, so as to facilitate the sealing of the manhole protection ring 4 and the gasket 3.
[0023] In this embodiment, a clip 2 is rotatably installed on one side of the fixing pad 5, and one side of the clip hanger 1 is inserted into the lower ring of the clip 2. One side of the clip 2 moves against the outer side of the pad 3 and the manhole protection ring 4, so that the clip 2 can be hung and will not fall off.
[0024] In this embodiment, a clamp 12 is fixedly installed on one side of the fixing pad 5. The clamp 12 is fixedly installed inside the manhole cover 6, which facilitates the fixing of the fixing pad 5 to the manhole cover 6.
[0025] In this embodiment, an opening assist device 10 is provided on one side of the clip hanger 1, and an anti-tipping round steel 16 is fixedly installed on the top side of the manhole cover 6 to prevent the sight glass hand hole 8 from colliding with the manhole cover 6.
[0026] In this embodiment, during equipment installation, the gasket 3 and manhole protective ring 4 are placed sequentially on the high-neck flange of the glass-lined manhole, and then the high-neck flange of the glass-lined manhole is sealed by tightening the mounting hook 11. Then, the clip hanger 1 is inserted into the lower ring of the clip 2 to hook the clip 2. Next, the sealing gasket 9 is placed into the groove of the manhole cover 6, and then the sight glass manhole 8 is placed above the sealing gasket 9. After adjusting the position, the sight glass manhole 8 and the manhole cover 6 are fixed together by the quick-release bolt nut 7. Simultaneously, the sight glass manhole 8 and the manhole cover 6 are placed on the gasket 5 with the fixing plate, and then the gasket 5 with the fixing plate is secured by the clamp 1. 2. Fix the manhole cover 6 above the manhole cover 6, and then place the retaining pad 5 on the manhole protective ring 4. At the same time, adjust the position of the retaining pad 5 with the clip 2 to ensure a seal. Finally, install the opening assist device 10 on one side. When the equipment needs to be inspected, open the quick-opening bolt nut 7 and pull the handle 15 to open the sight glass handhole 8 for inspection. When the equipment needs to be repaired, remove the clip 2, which will hang on the clip hanger 1 and will not fall off. Then, open the opening assist device 10 to remove the restriction on the manhole cover 6. Then, open the manhole cover 6 to enter the equipment for inspection.
[0027] The above provides a detailed description of a multifunctional enameled glass manhole provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A multifunctional enameled glass manhole, characterized in that, include: The manhole cover (6) consists of a clip (1), a glass-lined manhole high-neck flange, and a manhole cover (6). The clip (1) is located on one side of the manhole cover (6). The manhole cover (6) has a groove inside, and a sealing gasket (9) is placed inside the groove. A sight glass handhole (8) is placed on top of the sealing gasket (9). A tempered borosilicate sight glass (14) is installed inside the sight glass (8). A glass-lined sight glass protective ring (13) is fixedly installed at the bottom of the tempered borosilicate sight glass (14). The outer side of the glass-lined sight glass protective ring (13) is located inside the manhole cover (6). The sight glass handhole (8) and the manhole cover (6) are fixed together by quick-release bolts and nuts (7). Handles (15) are fixedly installed on both sides of the sight glass handhole (8).
2. The multifunctional enameled glass manhole according to claim 1, characterized in that, The manhole cover (6) is provided with a gasket (5) with a fixing plate on one side, a manhole protection ring (4) is provided on one side of the gasket (5), and a gasket (3) is provided on one side of the manhole protection ring (4). The manhole protection ring (4) and the gasket (3) are located on one side of the high neck flange of the glass-lined manhole.
3. A multifunctional enameled glass manhole according to claim 2, characterized in that, A clip (2) is rotatably installed on one side of the fixed pad (5), and one side of the clip hanger (1) is inserted into the lower ring of the clip (2). One side of the clip (2) is movably abutting against the outside of the pad (3) and the manhole protection ring (4).
4. A multifunctional enameled glass manhole according to claim 2, characterized in that, A clamp (12) is fixedly installed on one side of the fixed pad (5), and the clamp (12) is fixedly installed inside the manhole cover (6).
5. A multifunctional enameled glass manhole according to claim 1, characterized in that, An anti-tipping round steel bar (16) is fixedly installed on one side of the top of the manhole cover (6).
6. A multifunctional enameled glass manhole according to claim 1, characterized in that, An opening assist device (10) is provided on one side of the clip (1).