Municipal manhole cover

Abstract

The application relates to the field of municipal facilities, in particular to a municipal inspection well cover which comprises a cover body and a frame body, the frame body is provided with a communication cavity, a closed cavity is arranged on the inner wall of the communication cavity, a step surface is formed at the joint of the closed cavity and the communication cavity, the cover body is rotationally connected to the inner wall of the closed cavity, a locking assembly is connected to the frame body, the locking assembly comprises a magnetic block one and a magnetic block two, a sliding cavity for the magnetic block one to slide is arranged on the surface of the frame body, the sliding cavity is communicated with the closed cavity, a fixing groove is arranged on the surface of the cover body facing the sliding cavity, and the magnetic block two is connected to the inner wall of the fixing groove. In the application, the magnetic block one and the magnetic block two are arranged, the magnetic block two attracts the magnetic block one to slide towards the direction close to the fixing groove, the end of the magnetic block one is embedded into the fixing groove to form fixation, the cover body is not easy to separate from the step surface, the surface of the cover body abuts against the step surface and closes the communication cavity, the closing of the inner cavity of the inspection well is realized, pedestrians are not easy to fall into the inner cavity of the inspection well, and therefore the safety of the use of the inspection well is improved.

Description

Technical Field

[0001] This application relates to the field of municipal facilities, and in particular to a municipal manhole cover. Background Technology

[0002] In urban construction, there are many underground pipelines, such as sewers, underground gas pipelines, water supply pipelines, power pipelines, communication pipelines, and defense pipelines. Every so often, an outlet leading to the ground is opened in these pipelines. The section from the pipeline to the ground is called a manhole. The manhole opening is usually flush with the ground, so a cover is needed. The cover used to cover the manhole is called a manhole cover.

[0003] During daily use, manhole covers are frequently stolen or accidentally opened, which negates their sealing effect on the manhole and poses a risk of pedestrians falling into the manhole, thus reducing the safety of manhole covers. Summary of the Invention

[0004] In order to improve the sealing stability of manhole covers, this application provides a municipal manhole cover.

[0005] This application provides a municipal manhole cover, which adopts the following technical solution:

[0006] A municipal manhole cover includes a cover body and a frame connected to the manhole. The frame has a communicating cavity that communicates with the inner cavity of the manhole. A closed cavity is formed in the inner wall of the communicating cavity. A stepped surface is formed at the connection between the closed cavity and the communicating cavity. The cover body is rotatably connected to the inner wall of the closed cavity. When the cover body rotates towards the communicating cavity, the surface of the cover body abuts against the stepped surface and closes the communicating cavity. A locking assembly is connected to the frame. The locking assembly includes a magnetic block one and a magnetic block two. A sliding cavity is formed on the surface of the frame for the magnetic block one to slide. The sliding cavity communicates with the closed cavity. A fixing groove is formed on the surface of the cover body facing the sliding cavity. The magnetic block two is connected to the inner wall of the fixing groove. When the surface of the cover body abuts against the stepped surface, the fixing groove and the sliding cavity communicate. The magnetic block two attracts the magnetic block one to slide towards the fixing groove. The end of the magnetic block one is embedded in the fixing groove to form a fixed position.

[0007] By adopting the above technical solution, the frame is fixed to the manhole, the connecting cavity connects to the inner cavity of the manhole, and the cover rotates towards the step surface. The surface of the cover presses against the step surface and seals the connecting cavity, thus sealing the inner cavity of the manhole and making it less likely for pedestrians to fall into the inner cavity, thereby improving the safety of manhole use. At the same time, the sliding cavity connects to the fixing groove, the second magnetic block is connected to the inner wall of the fixing groove, and the first magnetic block is slidably connected to the inner wall of the sliding cavity. The second magnetic block attracts the first magnetic block to slide towards the fixing groove, and the end of the first magnetic block is embedded in the fixing groove to form a fixation, which enhances the structural strength of the fixation between the cover and the frame, making it less likely for the cover to detach from the step surface, thereby ensuring the stability of the cover in sealing the inner cavity of the manhole. Moreover, the cover rotates and connects to the inner wall of the sealed cavity, reducing the risk of the cover being stolen.

[0008] Optionally, the locking assembly further includes a locking elastic element, one end of which is connected to the inner wall of the sliding cavity in the direction of elastic force, and the other end of which is connected to the magnetic block one in the direction of elastic force. The direction of elastic force of the locking elastic element and the sliding direction of the magnetic block one are parallel to each other. The elastic force of the locking elastic element is less than the magnetic force of the magnetic block two, and the locking elastic element has the tendency to drive the magnetic block one to slide away from the closed cavity.

[0009] By adopting the above technical solution, when the user needs to open the manhole, the magnetic block one is driven to slide away from the fixed groove, and the end of the magnetic block one is disengaged from the fixed groove, so that the limiting effect of the magnetic block one on the cover disappears, and the cover is driven to rotate away from the step surface, so that the sealing effect of the cover on the closed cavity disappears, thus making it convenient for the user to pass through the closed cavity and the connecting cavity in sequence and enter the manhole cavity for maintenance; at the same time, the attraction of the magnetic block two on the magnetic block one disappears, and the elastic force of the locking elastic element drives the magnetic block one to slide away from the fixed groove, realizing the automatic reset of the magnetic block one. The user does not need to manually adjust the position of the magnetic block one in the sliding cavity, improving the ease of use of the municipal manhole cover.

[0010] Optionally, a slider is connected to the magnetic block, and a groove is provided on the inner wall of the sliding cavity for the slider to slide.

[0011] By adopting the above technical solution, when the magnetic block 1 slides on the inner wall of the sliding cavity, it drives the slider to slide on the inner wall of the sliding groove, making it less likely for the magnetic block 1 to deviate when sliding on the inner wall of the sliding cavity, thereby improving the stability of the magnetic block 1 sliding in the sliding cavity.

[0012] Optionally, a warning component is connected to the frame. The warning component includes a contact switch and a warning light strip. The warning light strip is connected to the surface of the frame, and the contact switch is connected to the inner wall of the slide groove. The contact switch and the warning light strip are electrically connected. When the locking elastic element forces the magnetic block to slide away from the closed cavity, the contact switch abuts against the magnetic block and conducts electricity, and the warning light strip is energized and illuminates.

[0013] By adopting the above technical solution, when the cover is stolen or accidentally opened, the magnetic force of magnetic block two on magnetic block one disappears, the elastic force of the locking elastic element drives magnetic block one to slide away from the closed cavity, contact switch one abuts against magnetic block one and conducts electricity, the warning light is energized and illuminates to warn pedestrians, reducing the risk of pedestrians falling into the manhole, thereby improving the safety of municipal manhole cover use.

[0014] Optionally, a clamping assembly is connected to the frame. The clamping assembly includes a positioning ring plug and a clamping arc plug. A positioning cavity for the positioning ring plug to slide is formed on the stepped surface. The positioning cavity surrounds the communicating cavity. The end of the positioning ring plug protruding from the stepped surface can abut against the surface of the cover. A clamping cavity for the clamping arc plug to slide is formed on the stepped surface. The clamping cavity is located on the side of the positioning cavity away from the communicating cavity. The inner arc surface of the clamping arc plug can abut against the outer periphery of the cover. The positioning cavity communicates with the clamping cavity. When the cover rotates towards the step surface, the surface of the cover abuts against the end of the positioning ring plug and drives the positioning ring plug to slide towards the positioning cavity, thereby driving the clamping arc plug to slide away from the clamping cavity. The inner arc surface of the clamping arc plug abuts against the outer periphery of the cover to form a fixed position.

[0015] By adopting the above technical solution, when the cover rotates towards the step surface, the surface of the cover presses against the step surface and seals the connecting cavity; at the same time, the surface of the cover abuts against the end of the positioning ring plug and drives the positioning ring plug to slide towards the positioning cavity, which drives the air in the positioning cavity into the pressing cavity. The air pressure in the pressing cavity increases and drives the pressing arc plug to slide towards the sealing cavity. The inner arc surface of the pressing arc plug presses against the outer periphery of the cover to form a fixation, increasing the pressing force between the cover and the pressing arc plug, making it difficult for the cover to detach from the sealing cavity, thereby improving the sealing stability of the cover to the connecting cavity.

[0016] Optionally, the clamping assembly further includes a clamping elastic element, one end of which is connected to the inner wall of the positioning cavity in the direction of elastic force, and the other end of which is connected to the positioning ring plug in the direction of elastic force. The clamping elastic element has the elastic force to drive the positioning ring plug to slide towards the closed cavity, and the end of the positioning ring plug tends to protrude from the stepped surface.

[0017] By adopting the above technical solution, when the cover rotates away from the step surface, the sealing effect of the cover on the connecting cavity disappears, and the clamping force of the cover on the positioning ring disappears. The elastic force of the clamping elastic element drives the positioning ring to slide towards the closed cavity, and the end of the positioning ring protrudes from the step surface, realizing the automatic reset of the positioning ring without the need for manual correction by the user, thereby improving the ease of use of municipal manhole covers for users.

[0018] Optionally, a reinforcing assembly is connected between the pressing arc plug and the cover. The reinforcing assembly includes an electromagnet, a magnetic block three, and a contact switch two. The pressing arc plug has a reinforcing groove on its inner arc surface facing the cover for the magnetic block three to slide. The cover has a reinforcing cavity on its surface facing the reinforcing groove. The electromagnet is connected to the inner wall of the reinforcing cavity. The contact switch two is connected to the inner wall of the fixing groove and is electrically connected to the electromagnet. When one end of the magnetic block is embedded in the fixing groove and abuts against the contact switch two, the contact switch two abuts and conducts. The electromagnet is energized and drives the magnetic block three to slide towards the reinforcing cavity. The end of the magnetic block three is embedded in the reinforcing cavity to form a fixed position.

[0019] By adopting the above technical solution, when the surface of the cover is pressed against the step surface and the magnetic block 2 attracts the end of the magnetic block 1 to be embedded in the fixed groove, the contact switch 2 abuts against the magnetic block 1 and conducts, the electromagnet is energized and obtains magnetic force, and at the same time the reinforcing groove and the reinforcing cavity are connected. The magnetic force of the electromagnet drives the magnetic block 3 to slide towards the reinforcing cavity. The end of the magnetic block 3 is embedded in the reinforcing cavity, making it difficult for the cover to detach from the step surface, thereby improving the sealing stability of the cover to the connected cavity.

[0020] Optionally, the reinforcing component further includes a reinforcing elastic element. One end of the reinforcing elastic element in the direction of elastic force is connected to the inner wall of the reinforcing groove, and the other end of the reinforcing elastic element in the direction of elastic force is connected to the magnetic block three. The elastic force of the reinforcing elastic element is less than the magnetic force of the electromagnet. The reinforcing elastic element has the elastic force to drive the magnetic block three to slide towards the reinforcing groove, and the end of the magnetic block three tends to be flush with the inner arc surface of the abutting arc plug.

[0021] By adopting the above technical solution, when one end of the magnetic block is disengaged from the fixed groove, the contact of the pair of contact switches of the magnetic block disappears, the electromagnetic property of the electromagnet disappears, the magnetic force of the electromagnet on the magnetic block disappears, and the elastic force of the reinforcing elastic element drives the magnetic block to slide towards the reinforcing groove. The end of the magnetic block is flush with the inner arc surface of the pressing arc plug, realizing the automatic reset of the magnetic block, so that the limiting effect of the magnetic block on the cover disappears, thereby making it convenient for the user to drive the cover to rotate.

[0022] Optionally, the outer periphery of the frame is connected with multiple reinforcing ribs at intervals.

[0023] By adopting the above technical solution, multiple reinforcing ribs are connected to the outer periphery of the frame, which increases the overall structural strength of the frame, making the frame less susceptible to deformation and damage under pressure, extending the service life of municipal manhole covers, reducing the number of times municipal manhole covers need to be replaced, reducing material consumption, and embodying the concept of environmental protection.

[0024] Optionally, the surface of the reinforcing rib away from the frame is provided with a buffer surface, which is in the shape of a circular arc protrusion.

[0025] By adopting the above technical solution, when a vehicle hits the frame, the tire comes into contact with the buffer surface, which is convex in an arc shape, reducing wear between the tire and the reinforcing rib, thereby extending the service life of the municipal manhole cover.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The setting of magnetic block one and magnetic block two: magnetic block two magnetically attracts magnetic block one to slide towards the fixing groove. The end of magnetic block one is embedded in the fixing groove to form a fixation, which enhances the structural strength of the cover and the frame, making it difficult for the cover to detach from the step surface. The surface of the cover is pressed against the step surface and closes the connecting cavity, thereby sealing the inner cavity of the manhole and making it difficult for pedestrians to fall into the inner cavity of the manhole, thus improving the safety of manhole use.

[0028] 2. The locking elastic element enables automatic reset of the magnetic block one, eliminating the need for manual adjustment of the magnetic block one's position within the sliding cavity and improving the ease of use of municipal manhole covers.

[0029] 3. The contact switch and warning light strip are designed so that the contact switch abuts against the magnetic block and conducts electricity. When the warning light strip is energized, it illuminates to warn pedestrians, reducing the risk of pedestrians falling into the manhole and thus improving the safety of using municipal manhole covers. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 2 This is a partial cross-sectional view of an embodiment of this application, mainly showing the locking component.

[0032] Figure 3 This is a partial cross-sectional view of an embodiment of this application, mainly showing the clamping component.

[0033] Figure 4 This is a partial structural diagram of the cover in an embodiment of this application, mainly showing the second contact switch.

[0034] Explanation of reference numerals in the attached drawings: 1. Cover; 11. Fixing groove; 12. Reinforcing cavity; 2. Frame; 21. Annular part one; 211. Communicating cavity; 212. Closed cavity; 213. Stepped surface; 214. Sliding cavity; 215. Slide groove; 216. Positioning cavity; 217. Pressing cavity; 22. Annular part two; 3. Locking assembly; 31. Magnetic block one; 32. Magnetic block two; 33. Locking elastic element; 4. Slider; 5. Warning assembly; 51. Contact switch one; 52. Warning light strip; 6. Pressing assembly; 61. Positioning ring plug; 62. Pressing arc plug; 621. Reinforcing groove; 63. Pressing elastic element; 7. Reinforcing assembly; 71. Electromagnet; 72. Magnetic block three; 73. Reinforcing elastic element; 74. Contact switch two; 8. Reinforcing rib; 81. Buffer surface. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] This application discloses a municipal manhole cover. (Refer to...) Figure 1 and Figure 2 The municipal manhole cover includes a cover body 1 and a frame body 2 connected to the manhole. The frame body 2 includes an annular portion 21 and an annular portion 22. The outer ring of the annular portion 21 is coaxially fixed to the inner ring of the annular portion 22. The surface of the annular portion 22 away from the annular portion 21 is fixed to the manhole opening by cement pouring. The annular portion 21 has a coaxially formed connecting cavity 211. The connecting cavity 211 passes through the outer wall of the annular portion 22 along the axis of the annular portion 21 and connects to the inner cavity of the manhole. The connecting cavity 211 is located away from the annular portion 22. The inner wall of the cover is coaxially provided with a closed cavity 212. The inner diameter of the closed cavity 212 is smaller than the inner diameter of the connecting cavity 211. A stepped surface 213 is formed at the connection between the closed cavity 212 and the connecting cavity 211. The cover 1 is rotatably connected to the inner wall of the closed cavity 212. The rotation axis of the cover 1 and the axis of the annular part 21 are perpendicular to each other. When the cover 1 rotates towards the step surface 213, the surface of the cover 1 presses against the step surface 213 and closes the connecting cavity 211. The end face of the cover 1 is flush with the end of the annular part 21.

[0037] Reference Figure 1 and Figure 2A locking component 3 is connected to the frame 2, which can firmly fix the cover 1 to the step surface 213. The locking assembly 3 includes a magnetic block 31, a magnetic block 32, and a locking elastic element 33. A fixing groove 11 is formed on the surface of the cover 1 away from its own rotation axis. The magnetic block 32 is fixed on the inner wall of the fixing groove 11 near the rotation axis of the cover 1. A sliding cavity 214 for the magnetic block 31 to slide is formed on the surface of the annular part 21 near the fixing groove 11. The sliding cavity 214 is connected to the closed cavity 212. The sliding direction of the magnetic block 31 is perpendicular to the rotation axis of the cover 1. The end of the magnetic block 31 facing the closed cavity 212 can be embedded in the fixing groove 11. A slider 4 is fixed at the bottom of the magnetic block 31. A sliding groove 215 for the slider 4 to slide is formed on the inner wall of the sliding cavity 214. When the magnetic block 31 is slidably connected to the inner wall of the sliding cavity 214, the slider 4 is slidably connected to the inner wall of the sliding groove 215, so that the magnetic block 31 is not easily deviated in the sliding cavity 214, thereby ensuring the stability of the end of the magnetic block 31 embedded in the fixing groove 11.

[0038] Reference Figure 2 The locking elastic element 33 can be a compression spring or a tension spring. In this embodiment, the locking elastic element 33 is a tension spring, which has a certain deformation capability. One end of the locking elastic element 33 in the direction of elastic force is fixed to the inner wall of the sliding cavity 214, and the other end of the locking elastic element 33 in the direction of elastic force is fixed to the end of the magnetic block 31 away from the cover 1. The direction of elastic force of the locking elastic element 33 and the sliding direction of the magnetic block 31 are parallel to each other. The locking elastic element 33 has the tendency to drive the magnetic block 31 to slide closer to the sliding cavity 214.

[0039] Reference Figure 2 The elastic force of the locking elastic element 33 is less than the magnetic force of the magnetic block 32. When the surface of the cover 1 is pressed against the step surface 213, the fixing groove 11 connects to the sliding cavity 214. The opposite poles of the magnetic block 31 and the magnetic block 32 are facing each other. The magnetic force of the magnetic block 32 drives the magnetic block 31 to slide towards the fixing groove 11. The end of the magnetic block 31 is embedded in the fixing groove 11 to form a fixation, so that the cover 1 is not easy to deflect in the closed cavity 212, thereby improving the pressing force between the end face of the cover 1 and the step surface 213.

[0040] Reference Figure 2A warning component 5 is connected to the frame 2. The warning component 5 is used to warn pedestrians when the cover 1 is pressed against the step surface 213. The warning component 5 includes a contact switch 51 and a warning light strip 52. The contact switch 51 is fixed to the inner wall of the slide groove 215, and the warning light strip 52 is fixed to the surface of the annular part 22 facing the annular part 21, and the warning light strip 52 surrounds the annular part 21. The warning light strip 52 is electrically connected to the contact switch 51. When the end of the magnetic block 31 is disengaged from the fixing groove 11, the locking elastic member 33 forces the magnetic block 31 to slide towards the contact switch 51. The contact switch 51 abuts against the magnetic block 31 and conducts electricity, and the warning light strip 52 is energized and illuminates, thereby warning pedestrians that the cover 1 is disengaged from the step surface 213, reducing the risk of pedestrians falling into the manhole, and thus improving the safety of municipal manhole cover use.

[0041] Reference Figure 3 An annular portion 21 is connected to a clamping component 6, which can clamp and fix the cover 1 to the stepped surface 213. The clamping component 6 includes a positioning ring plug 61, a clamping arc plug 62, and a clamping elastic element 63. The positioning ring plug 61 can be made of rubber or silicone. In this embodiment, the positioning ring plug 61 is made of rubber and has a certain deformation capability. The stepped surface 213 is coaxially provided with a positioning cavity 216 for the positioning ring plug 61 to slide. The positioning cavity 216 surrounds the communicating cavity 211.

[0042] Reference Figure 3 The clamping elastic element 63 can be a compression spring or a tension spring. In this embodiment, the clamping elastic element 63 is a compression spring, which has a certain deformation capability. The number of clamping elastic elements 63 can be one, two, or more. In this embodiment, the number of clamping elastic elements 63 is more than one. One end of the multiple clamping elastic elements 63 in the elastic direction is evenly fixed to the inner wall of the positioning cavity 216, and the other end of the multiple clamping elastic elements 63 in the elastic direction is evenly fixed to the end of the positioning ring plug 61. The elastic direction of the clamping elastic element 63 is parallel to the axis of the annular portion 21. The clamping elastic element 63 has the elastic force to drive the positioning ring plug 61 to slide towards the closed cavity 212, and the end of the positioning ring plug 61 tends to protrude from the stepped surface 213. The end of the positioning ring plug 61 protruding from the stepped surface 213 can abut against the surface of the cover 1.

[0043] Reference Figure 3The material of the clamping plug 62 can be rubber or silicone. In this embodiment, the material of the clamping plug 62 is rubber, which has a certain deformation capability. The number of clamping plugs 62 can be one, two or more. In this embodiment, the number of clamping plugs 62 is two. A clamping cavity 217 for the clamping plug 62 to slide is provided on the stepped surface 213. In this embodiment, the number of clamping cavities 217 is two. The two clamping cavities 217 are located on two mutually distant sides of the positioning cavity 216. The clamping plug 62 corresponds to the clamping cavity 217 and is slidably connected to the inner wall of the clamping cavity 217. The clamping cavity 217 is connected to the positioning cavity 216. The end of the clamping plug 62 is flush with the stepped surface 213, and the inner arc surface of the clamping plug 62 can press against the outer periphery of the cover 1. When the cover 1 rotates toward the step surface 213 and presses against the step surface 213, the surface of the cover 1 abuts against the positioning ring plug 61 and drives the positioning ring plug 61 to slide toward the positioning cavity 216. The end of the positioning ring plug 61 is flush with the step surface 213, which drives the air in the positioning cavity 216 into the pressing cavity 217. The air pressure in the pressing cavity 217 increases and drives the pressing ring plug to slide toward the closed cavity 212. The end of the pressing ring plug protrudes from the step surface 213, and the inner arc surface of the pressing arc plug 62 presses against the outer periphery of the cover 1 to form a fixation, making it difficult for the cover 1 to deflect in the closed cavity 212, thereby increasing the pressing force between the cover 1 and the step surface 213.

[0044] Reference Figure 3 and Figure 4 A reinforcing component 7 is connected between the sealing plug 62 and the cover 1. The reinforcing component 7 can increase the clamping force between the cover 1 and the sealing plug 62. The reinforcing component 7 includes an electromagnet 71, a magnetic block 72, a reinforcing elastic element 73, and a contact switch 74. In this embodiment, there are multiple magnetic blocks 72 and reinforcing elastic elements 73. Multiple reinforcing grooves 621 are evenly spaced on the inner arc surface of the abutting plug 62 to allow the magnetic blocks 72 to slide. The reinforcing elastic element 73 can be a compression spring or a tension spring. In this embodiment, the reinforcing elastic element 73 is a tension spring with a certain deformation capability. The reinforcing elastic element 73 and the magnetic blocks 72 correspond one-to-one. One end of the reinforcing elastic element 73 in the direction of elastic force is fixed to the inner wall of the reinforcing groove 621, and the other end of the reinforcing elastic element 73 in the direction of elastic force is fixed to the magnetic block 72. The reinforcing elastic element 73 has the elastic force to drive the magnetic block 72 to slide towards the reinforcing groove 621, and the end of the magnetic block 72 tends to be flush with the inner arc surface of the abutting plug 62.

[0045] Reference Figure 3In this embodiment of the application, there are multiple electromagnets 71. Multiple reinforcing cavities 12 are evenly spaced on the surface of the cover 1 facing the reinforcing groove 621. The reinforcing cavities 12 and the reinforcing groove 621 correspond to each other and are connected. The ends of the magnetic blocks 72 are embedded in the reinforcing cavities 12. The electromagnets 71 and the reinforcing cavities 12 correspond to each other. The electromagnets 71 are fixed on the inner wall of the reinforcing cavity 12 away from the abutting arc plug 62.

[0046] Reference Figure 2 and Figure 4 The second contact switch 74 is fixed on the inner wall of the fixing groove 11 near the first magnetic block 31. The second contact switch 74 can abut against the first magnetic block 31 and conduct electricity.

[0047] Reference Figure 3 and Figure 4 The contact switch 74 is electrically connected to multiple electromagnets 71, and the magnetic force of the electromagnets 71 is greater than the elastic force of the reinforcing elastic element 73.

[0048] Reference Figure 3 and Figure 4 When the second contact switch 74 is engaged and turned on, the electromagnet 71 is energized and becomes magnetic, and the magnetic force drives the third magnetic block 72 to slide towards the reinforcing cavity 12. The end of the third magnetic block 72 is embedded in the reinforcing cavity 12, so that the cover 1 is not easily deflected in the closed cavity 212, thereby ensuring the clamping force between the cover 1 and the step surface 213.

[0049] Reference Figure 1 Multiple reinforcing ribs 8 are fixed at intervals at the connection between the annular part 21 and the annular part 21. The surface of the reinforcing ribs 8 facing away from the annular part 21 is provided with a buffer surface 81, which is in the shape of a circular arc protrusion.

[0050] The implementation principle of a municipal manhole cover according to an embodiment of this application is as follows: When the cover 1 rotates towards the step surface 213, the surface of the cover 1 presses against the step surface 213 and closes the connecting cavity 211. The end face of the cover 1 is flush with the end of the annular part 21. At the same time, the fixing groove 11 connects to the sliding cavity 214. The opposite poles of the magnetic block 31 and the magnetic block 32 face each other. The magnetic force of the magnetic block 32 drives the magnetic block 31 to slide towards the fixing groove 11. The end of the magnetic block 32 is embedded in the fixing groove 11 to form a fixation, so that the cover 1 is not easy to deflect in the closed cavity 212, which enhances the structural strength of the cover 1 and the frame 2, making it difficult for the cover 1 to detach from the step surface 213, thereby achieving the sealing of the manhole cavity and making it difficult for pedestrians to fall into the manhole cavity, thus improving the safety of manhole use.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. Municipal manhole covers, characterized in that: The device includes a cover (1) and a frame (2) connected to the manhole. The frame (2) has a communicating cavity (211) communicating with the inner cavity of the manhole. A closed cavity (212) is formed on the inner wall of the communicating cavity (211). A stepped surface (213) is formed at the connection between the closed cavity (212) and the communicating cavity (211). The cover (1) is rotatably connected to the inner wall of the closed cavity (212). When the cover (1) rotates toward the communicating cavity (211), the cover (1) 1) The surface abuts against the stepped surface (213) and closes the connecting cavity (211). A locking component (3) is connected to the frame (2). The locking component (3) includes a magnetic block one (31) and a magnetic block two (32). A sliding cavity (214) for the magnetic block one (31) to slide is opened on the surface of the frame (2). The sliding cavity (214) is connected to the closed cavity (212). A fixing groove (11) is opened on the surface of the cover (1) facing the sliding cavity (214). The second magnetic block (32) is connected to the inner wall of the fixing groove (11). When the surface of the cover (1) abuts against the step surface (213), the fixing groove (11) and the sliding cavity (214) are connected. The second magnetic block (32) attracts the first magnetic block (31) to slide towards the fixing groove (11). The end of the first magnetic block (31) is embedded in the fixing groove (11) to form a fixation. The locking assembly (3) also includes a locking elastic element (33). One end of the elastic force is connected to the inner wall of the sliding cavity (214), and the other end of the locking elastic element (33) is connected to the magnetic block one (31). The elastic force direction of the locking elastic element (33) and the sliding direction of the magnetic block one (31) are parallel to each other. The elastic force of the locking elastic element (33) is less than the magnetic force of the magnetic block two (32), and the locking elastic element (33) has the tendency to drive the magnetic block one (31) to slide away from the closed cavity (212).A clamping assembly (6) is connected to the frame (2). The clamping assembly (6) includes a positioning ring plug (61) and a clamping arc plug (62). The stepped surface (213) has a positioning cavity (216) for the positioning ring plug (61) to slide. The positioning cavity (216) surrounds the communicating cavity (211). The end of the positioning ring plug (61) protruding from the stepped surface (213) can abut against the surface of the cover (1). The stepped surface (213) has a clamping cavity (217) for the clamping arc plug (62) to slide. The clamping cavity (217) is located in the positioning cavity (216). On the side away from the connecting cavity (211), the inner arc surface of the clamping plug (62) can abut against the outer periphery of the cover (1). The positioning cavity (216) is connected to the clamping cavity (217). When the cover (1) rotates towards the step surface (213), the surface of the cover (1) abuts against the end of the positioning ring plug (61) and drives the positioning ring plug (61) to slide towards the positioning cavity (216), causing the clamping plug (62) to slide away from the clamping cavity (217). The inner arc surface of the clamping plug (62) abuts against the outer periphery of the cover (1) to form a fixed position.

2. The municipal manhole cover according to claim 1, characterized in that: The magnetic block (31) is connected to a slider (4), and the inner wall of the sliding cavity (214) is provided with a groove (215) for the slider (4) to slide.

3. The municipal manhole cover according to claim 2, characterized in that: A warning component (5) is connected to the frame (2). The warning component (5) includes a contact switch (51) and a warning light strip (52). The warning light strip (52) is connected to the surface of the frame (2). The contact switch (51) is connected to the inner wall of the slide groove (215). The contact switch (51) is electrically connected to the warning light strip (52). When the locking elastic element (33) forces the magnetic block (31) to slide away from the closed cavity (212), the contact switch (51) abuts against the magnetic block (31) and conducts electricity, and the warning light strip (52) is energized and illuminates.

4. The municipal manhole cover according to claim 1, characterized in that: The clamping assembly (6) further includes a clamping elastic member (63), one end of which is connected to the inner wall of the positioning cavity (216) in the elastic direction, and the other end of which is connected to the positioning ring plug (61). The clamping elastic member (63) has the elastic force to drive the positioning ring plug (61) to slide towards the closed cavity (212), and the end of the positioning ring plug (61) tends to protrude from the stepped surface (213).

5. The municipal manhole cover according to claim 1, characterized in that: A reinforcing assembly (7) is connected between the clamping plug (62) and the cover (1). The reinforcing assembly (7) includes an electromagnet (71), a magnetic block three (72), and a contact switch two (74). The clamping plug (62) has a reinforcing groove (621) on its inner arc surface facing the cover (1) for the magnetic block three (72) to slide. The cover (1) has a reinforcing cavity (12) on its surface facing the reinforcing groove (621). The electromagnet (71) is connected to the inner wall of the reinforcing cavity (12). The second contact switch (74) is connected to the inner wall of the fixed groove (11). The second contact switch (74) is electrically connected to the electromagnet (71). When the end of the first magnetic block (31) is embedded in the fixed groove (11) and abuts against the second contact switch (74), the second contact switch (74) abuts and conducts. The electromagnet (71) is energized and drives the third magnetic block (72) to slide towards the reinforcing cavity (12). The end of the third magnetic block (72) is embedded in the reinforcing cavity (12) to form a fixed position.

6. The municipal manhole cover according to claim 5, characterized in that: The reinforcing component (7) further includes a reinforcing elastic element (73). One end of the reinforcing elastic element (73) in the elastic direction is connected to the inner wall of the reinforcing groove (621), and the other end of the reinforcing elastic element (73) in the elastic direction is connected to the magnetic block three (72). The elastic force of the reinforcing elastic element (73) is less than the magnetic force of the electromagnet (71). The reinforcing elastic element (73) has the elastic force to drive the magnetic block three (72) to slide towards the reinforcing groove (621), and the end of the magnetic block three (72) tends to be flush with the inner arc surface of the abutting arc plug (62).

7. The municipal manhole cover according to claim 1, characterized in that: The outer periphery of the frame (2) is connected with multiple reinforcing ribs (8) at intervals.

8. The municipal manhole cover according to claim 7, characterized in that: The surface of the reinforcing rib (8) away from the frame (2) is provided with a buffer surface (81), and the buffer surface (81) is in the shape of a circular arc protrusion.

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