Modular concrete drainage manhole structure
By dividing the inspection well into a base, stacking cylinder, and top cylinder, and utilizing a modular design with connecting screws and threaded sleeves, the problem of poor installation flexibility in existing inspection wells is solved, and the stability and sealing performance are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINHONGSHENG NEW MATERIALS (ZHEJIANG) CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-24
AI Technical Summary
Existing concrete inspection wells have poor installation flexibility and it is difficult to adjust the structure according to the installation location.
The inspection well is divided into three parts: base, stacked cylinder and top cylinder. Modular assembly is achieved by connecting screws and threaded sleeves. Combined with sealing gaskets and operating structures, the installation stability and sealing performance are improved.
It enables flexible installation of inspection wells, adapts to different installation requirements, and improves the stability and sealing performance after assembly.
Smart Images

Figure CN224549302U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a manhole structure, specifically a modular concrete drainage manhole structure, belonging to the field of drainage manholes. Background Technology
[0002] Inspection wells are installed to facilitate the maintenance and installation of underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street light lines in cities. They are generally located at pipe intersections, bends, changes in pipe diameter or slope, and at regular intervals on straight pipe sections to facilitate periodic inspections of the ancillary structures.
[0003] Existing concrete inspection wells are usually prefabricated, which makes it difficult to adjust the structure of the inspection well according to the installation location during installation. Only targeted customization is possible, resulting in poor installation flexibility. Utility Model Content
[0004] The purpose of this utility model is to provide a modular concrete drainage inspection well structure to solve the above problems. By dividing the inspection well into three parts: base, stacking cylinder, and top cylinder, users can stack and fix different structures and numbers of stacking cylinders between the base and top cylinder by connecting screws to meet different installation needs.
[0005] This utility model achieves the above-mentioned objectives through the following technical solution: a modular concrete drainage inspection well structure, including an operating platform and a base, with an installation structure on the base, the installation structure including a stacking cylinder, the stacking cylinder on the base, a top cylinder on the stacking cylinder, two connecting screws fixedly connected to the inner side of the base, a connecting pipe fixedly connected to the inner side of the stacking cylinder, the connecting pipe being slidably connected to the connecting screws, a threaded sleeve rotatably connected to the inner side of the top cylinder, the threaded sleeve being threadedly connected to the top end of the connecting screws, and an operating structure on the inner side of the top cylinder.
[0006] Preferably, a first sealing gasket is fixedly connected to the top side of the base, and the base abuts against the stacking cylinder through the first sealing gasket. A second sealing gasket is fixedly connected to the top side of the stacking cylinder, and the top side of the stacking cylinder abuts against the top cylinder through the second sealing gasket.
[0007] Preferably, the inner side of the top cylinder abuts against an operating cover, the bottom side of the operating cover is rotatably connected to a second bevel gear, the top end of the threaded sleeve has a square structure, and the top end of the threaded sleeve is slidably connected to the corresponding second bevel gear.
[0008] Preferably, a connecting rod is rotatably connected to the middle of the operating cover, and a first bevel gear is fixedly connected to each end of the connecting rod. The first bevel gear meshes with a second bevel gear arranged on the same side.
[0009] Preferably, the operating structure includes a positioning groove, the inner side of the top cylinder is provided with a positioning groove, the side of the operating cover is slidably connected with a positioning plate, and the end of the positioning plate is engaged with the top cylinder through the positioning groove.
[0010] Preferably, two release blocks are symmetrically slidably connected on the positioning plate, and a second spring is fixedly connected between the two release blocks. An adjustment groove is provided on the operating cover, and the release blocks are engaged with the operating cover through the adjustment groove.
[0011] Preferably, a drive rod is rotatably connected to the middle of the connecting rod, and the side of the drive rod abuts against the operating cover.
[0012] Preferably, a ratchet block is slidably connected to the middle of the drive rod, and a first spring is fixedly connected between the ratchet block and the drive rod.
[0013] Preferably, the connecting rod has a ratchet groove on its side, and the end of the ratchet block engages with the connecting rod through the ratchet groove.
[0014] The beneficial effects of this utility model are as follows: a stacking cylinder and a top cylinder are provided on the base. Before installing the inspection well, the construction personnel can select different quantities and structures of stacking cylinders as needed. Then, the base is installed first, and then the selected stacking cylinders are installed onto the base in sequence through two connecting screws on the base. Finally, the top cylinder is installed. The inner side of the top cylinder is provided with a threaded sleeve. By rotating the threaded sleeve, the connection between the base, stacking cylinder and top cylinder can be reinforced to ensure the overall stability of the inspection well. Through modular assembly of the inspection well, the installation of the inspection well is more flexible and adaptable to different installation needs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the connection structure between the base and the stacking cylinder of this utility model;
[0017] Figure 3 This is a schematic diagram of the connection structure between the stacking cylinder and the top cylinder of this utility model;
[0018] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of part A.
[0019] Figure 5 This is a schematic diagram of the connection structure between the top cylinder and the operating cover of this utility model;
[0020] Figure 6 for Figure 5The diagram shows an enlarged view of section B.
[0021] In the diagram: 1. Base; 2. Mounting structure; 201. Stacking cylinder; 202. Top cylinder; 203. First sealing gasket; 204. Second sealing gasket; 205. Connecting screw; 206. Connecting pipe; 207. Threaded sleeve; 208. Operating cover; 209. Connecting rod; 210. First bevel gear; 211. Second bevel gear; 3. Operating structure; 301. Drive rod; 302. Ratchet block; 303. First spring; 304. Ratchet groove; 305. Positioning plate; 306. Positioning groove; 307. Release block; 308. Second spring; 309. Adjustment groove. Detailed Implementation
[0022] 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.
[0023] Please see Figures 1-6 As shown, the modular concrete drainage inspection well structure includes a base 1, an installation structure 2 on the base 1, and a stacking cylinder 201 on the base 1. The stacking cylinder 201 is provided on the stacking cylinder 201 and a top cylinder 202 is provided on the stacking cylinder 201. Two connecting screws 205 are fixedly connected to the inner side of the base 1. A connecting pipe 206 is fixedly connected to the inner side of the stacking cylinder 201. The connecting pipe 206 is slidably connected to the connecting screws 205. A threaded sleeve 207 is rotatably connected to the inner side of the top cylinder 202. The threaded sleeve 207 is threadedly connected to the top end of the connecting screws 205. An operating structure 3 is provided on the inner side of the top cylinder 202.
[0024] As a technical optimization of this utility model, a first sealing gasket 203 is fixedly connected to the top side of the base 1. The base 1 abuts against the stacking cylinder 201 through the first sealing gasket 203. A second sealing gasket 204 is fixedly connected to the top side of the stacking cylinder 201. The top side of the stacking cylinder 201 abuts against the top cylinder 202 through the second sealing gasket 204. By setting the first sealing gasket 203 and the second sealing gasket 204, the overall sealing performance of the inspection well after assembly can be improved. The inner side of the top cylinder 202 abuts against the operating cover 208. A second bevel gear 211 is rotatably connected to the bottom side of the operating cover 208. The top end of the threaded sleeve 207 has a square structure. The top end of the threaded sleeve 207 is slidably connected to the corresponding second bevel gear 211. A connecting rod 209 is rotatably connected to the middle of the top cylinder 202. A first bevel gear 210 is fixedly connected to each end of the connecting rod 209. The first bevel gear 210 meshes with a second bevel gear 211 set on the same side. In order to ensure that the two threaded sleeves 207 on both sides of the top cylinder 202 can rotate synchronously, thereby making the assembly of the inspection well more stable, a connecting rod 209 is set inside the operating cover 208 located inside the top cylinder 202. By rotating the connecting rod 209, the two second bevel gears 211 can be driven to rotate through the first bevel gear 210. At this time, the second bevel gear 211 will slide to the top of the threaded sleeve 207 on the same side while rotating. At this time, the two threaded sleeves 207 can be driven to rotate simultaneously through the connecting rod 209.
[0025] As a technical optimization of this utility model, the operating structure 3 includes a positioning groove 306. A positioning groove 306 is provided on the inner side of the top cylinder 202. A positioning plate 305 is slidably connected to the side of the operating cover 208. The end of the positioning plate 305 is engaged with the top cylinder 202 through the positioning groove 306. Two release blocks 307 are symmetrically slidably connected to the positioning plate 305. A second spring 308 is fixedly connected between the two release blocks 307. An adjustment groove 309 is provided on the operating cover 208. The release blocks 307 are engaged with the operating cover 208 through the adjustment groove 309. To facilitate the fixing of the operating cover 208 during the tightening of the inspection well, the user can slide the two release blocks 307 to change their position in the adjustment groove 309, thereby adjusting the extension state of the end of the positioning plate 305, so that the positioning plate 305 is engaged with the positioning groove 306 on the top cylinder 202. A drive rod 301 is rotatably connected to the middle of the connecting rod 209. The side of the drive rod 301... The operating cover 208 abuts against the surface of the manhole. A ratchet block 302 is slidably connected to the middle of the drive rod 301. A first spring 303 is fixedly connected between the ratchet block 302 and the drive rod 301. A ratchet groove 304 is provided on the side of the connecting rod 209. The end of the ratchet block 302 engages with the connecting rod 209 through the ratchet groove 304. To facilitate the rotation of the connecting rod 209, the user can reciprocate the drive rod 301 provided in the middle of the connecting rod 209. The ratchet block 302 is provided on the inner side of the drive rod 301. Combined with the ratchet groove provided in the middle of the connecting rod 209, the user can drive the drive rod 301 to rotate in one direction by reciprocating the rotation of the connecting rod 209, thereby securing the entire manhole. After installation, the operating cover 208 can be removed as a whole to ensure the normal use of the manhole itself. At the same time, the user can also install the operating cover 208 in reverse. At this time, the drive rod 301 can drive the connecting rod 209 to rotate in the opposite direction, thereby releasing the manhole components.
[0026] In use, this invention first has a stacking cylinder 201 and a top cylinder 202 mounted on the base 1. Before installing the inspection well, the construction personnel can select different quantities and structures of the stacking cylinders 201 as needed. Then, the base 1 is installed first, followed by the selection of stacking cylinders 201 sequentially mounted onto the base 1 using two connecting screws 205. Finally, the top cylinder 202 is installed. A threaded sleeve 207 is provided on the inner side of the top cylinder 202. Rotating the threaded sleeve 207 strengthens the connection between the base 1, the stacking cylinders 201, and the top cylinder 202, ensuring the overall stability of the inspection well. The modular assembly of the inspection well allows for greater installation flexibility, adapting to different installation needs. A first sealing gasket 203 and a second sealing gasket 204 are provided between the base 1, the stacking cylinder 201, and the top cylinder 202. These gaskets improve the overall sealing performance of the inspection well after assembly. To ensure the synchronous rotation of the two threaded sleeves 207 on both sides of the top cylinder 202, thus making the assembly of the inspection well more stable, a connecting rod 209 is provided inside the operating cover 208 located inside the top cylinder 202. Rotating the connecting rod 209 further... The first bevel gear 210 drives the two second bevel gears 211 to rotate. At this time, the second bevel gears 211 slide to the top of the threaded sleeve 207 on the same side while rotating. Then, the connecting rod 209 can simultaneously drive the two threaded sleeves 207 to rotate. To facilitate the fixing of the operating cover 208 during the tightening of the inspection well, the user can slide the two release blocks 307 to change their position in the adjusting groove 309, thereby adjusting the extension state of the end of the positioning plate 305, so that the positioning plate 305 engages with the positioning groove 306 opened on the top cylinder 202. To facilitate the connection rod 209... The user can rotate the drive rod 301 located in the middle of the connecting rod 209 back and forth. The drive rod 301 has a ratchet block 302 on its inner side. Combined with the ratchet groove in the middle of the connecting rod 209, the user can drive the drive rod 301 to rotate in one direction by rotating the connecting rod 209 back and forth, thereby securing the entire inspection well. After installation, the operating cover 208 can be removed to ensure the normal use of the inspection well. At the same time, the user can also install the operating cover 208 in reverse. At this time, the drive rod 301 can drive the connecting rod 209 to rotate in the opposite direction, thereby releasing the components of the inspection well.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A modular concrete drainage inspection well structure, including a base (1), characterized in that: The base (1) is provided with an installation structure (2), the installation structure (2) includes a stacking cylinder (201), the base (1) is provided with a stacking cylinder (201), the stacking cylinder (201) is provided with a top cylinder (202), two connecting screws (205) are fixedly connected to the inner side of the base (1), a connecting pipe (206) is fixedly connected to the inner side of the stacking cylinder (201), the connecting pipe (206) is slidably connected to the connecting screws (205), a threaded sleeve (207) is rotatably connected to the inner side of the top cylinder (202), the threaded sleeve (207) is threadedly connected to the top end of the connecting screws (205), and an operating structure (3) is provided on the inner side of the top cylinder (202).
2. The modular concrete drainage inspection well structure according to claim 1, characterized in that: A first sealing gasket (203) is fixedly connected to the top side of the base (1), and the base (1) abuts against the stacking cylinder (201) through the first sealing gasket (203). A second sealing gasket (204) is fixedly connected to the top side of the stacking cylinder (201), and the top side of the stacking cylinder (201) abuts against the top cylinder (202) through the second sealing gasket (204).
3. The modular concrete drainage inspection well structure according to claim 1, characterized in that: The inner side of the top cylinder (202) abuts against the operating cover (208), and the bottom side of the operating cover (208) is rotatably connected to the second bevel gear (211). The top end of the threaded sleeve (207) has a square structure, and the top end of the threaded sleeve (207) is slidably connected to the corresponding second bevel gear (211).
4. The modular concrete drainage inspection well structure according to claim 3, characterized in that: A connecting rod (209) is rotatably connected to the middle of the operating cover (208). A first bevel gear (210) is fixedly connected to each end of the connecting rod (209). The first bevel gear (210) meshes with a second bevel gear (211) arranged on the same side.
5. The modular concrete drainage inspection well structure according to claim 4, characterized in that: The operating structure (3) includes a positioning groove (306). The positioning groove (306) is provided on the inner side of the top cylinder (202). The side of the operating cover (208) is slidably connected to a positioning plate (305). The end of the positioning plate (305) is engaged with the top cylinder (202) through the positioning groove (306).
6. The modular concrete drainage inspection well structure according to claim 5, characterized in that: Two release blocks (307) are symmetrically slidably connected on the positioning plate (305). A second spring (308) is fixedly connected between the two release blocks (307). An adjustment groove (309) is provided on the operating cover (208). The release blocks (307) are engaged with the operating cover (208) through the adjustment groove (309).
7. The modular concrete drainage inspection well structure according to claim 5, characterized in that: The connecting rod (209) is rotatably connected to a driving rod (301) at its center, and the side of the driving rod (301) abuts against the operating cover (208).
8. The modular concrete drainage inspection well structure according to claim 7, characterized in that: A ratchet block (302) is slidably connected to the middle of the drive rod (301), and a first spring (303) is fixedly connected between the ratchet block (302) and the drive rod (301).
9. The modular concrete drainage inspection well structure according to claim 8, characterized in that: The connecting rod (209) has a ratchet groove (304) on its side, and the end of the ratchet block (302) engages with the connecting rod (209) through the ratchet groove (304).