A ventilated ductile iron explosion-proof manhole cover and a method of using the same

Abstract

The present invention discloses a ventilated ductile iron explosion-proof manhole cover and a method for using the same, including a manhole cover seat, a support groove is provided at the center of the manhole cover seat, a water inlet device is fixedly connected to the inner ring of the support groove, a filter frame is movably connected in the support groove, ventilation holes are provided at equal distances on the manhole cover seat, a ventilation duct is provided at the lower end of the ventilation hole, a ventilation device is provided in the ventilation duct, and the water inlet device includes a water inlet cylinder, a support frame and a rotating frame. The ventilated ductile iron explosion-proof manhole cover and a method for using the same proposed by the present invention are provided with a guide plate and a one-way door, the one-way door and the guide plate are against each other to prevent odor from overflowing, the guide plate limits the direction of the one-way door, so that rainwater can just hit the concave surface of the curved plate, drive the curved plate to rotate, use the curved plate to drive the toggle rod to rotate, realize the rotation of the ventilation fan, use the odor filter layer to deodorize and exhaust, avoid polluting the environment, and effectively avoid the accumulation of flammable gases such as methane and explosion.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers, and in particular to a ventilated ductile iron explosion-proof manhole cover and a use method thereof. Background Art

[0002] Ductile iron manhole covers are often seen in our lives. They are a good drainage tool. Ductile iron manhole covers are light in weight, high in strength, good in toughness, corrosion-resistant, fatigue-resistant, and cost-effective. Compared with gray cast iron manhole covers of the same specifications and sizes, they are more practical. After the existing ductile iron manhole covers are installed, the sewers are not ventilated during use, which leads to the accumulation of flammable gases such as methane. If the sewers are not ventilated in time, it will easily cause certain dangers.

[0003] Chinese patent CN214144069U discloses a sewer ventilation device with an energy conversion structure, including a fixed outer frame, a fixed structure is arranged on the inner side of the fixed outer frame, four rotating balls are symmetrically installed inside the fixed structure, a ventilation structure is installed on the fixed structure, the ventilation structure includes a mounting structure, three ventilation fan blades are evenly arranged on the outer wall of the mounting structure, and a reset spring is arranged on the upper end of the fixed outer frame. The sewer ventilation device with an energy conversion structure described in the utility model belongs to the field of energy conversion equipment. By setting the ventilation structure, the circulation of air inside the sewer can be facilitated; by setting a threaded column at the lower end of the movable manhole cover, the ventilation structure can be easily pushed to rotate; by setting a reset spring, the rotation of the movable manhole cover can be facilitated; by setting a sliding ball, the rotation of the ventilation structure can be facilitated, thereby ultimately reducing the danger caused by the stagnation of sewer air.

[0004] Although this application solves the problems in the background technology to a certain extent, the structure of this application is simple. When ventilation is achieved by using ventilation blades, it is easy to discharge odor and pollute the environment. At the same time, the manhole cover can only be ventilated when it is under pressure. The sewer cannot be ventilated on rainy days or when there are few vehicles. Summary of the invention

[0005] The object of the present invention is to provide a ventilated ductile iron explosion-proof manhole cover and a method for using the same. The manhole cover is provided with a guide plate and a one-way door. The one-way door abuts against the guide plate, and the one-way door plays a sealing role to prevent odor from overflowing. The guide plate limits the direction of the one-way door, so that rainwater can just hit the concave surface of the arc plate, driving the arc plate to rotate. The arc plate is used to drive the toggle rod to rotate, so as to realize the rotation of the ventilation fan, generate negative pressure in the ventilation duct, and the gas in the sewer pipe is sucked into the ventilation duct and discharged. At the same time, a filter frame is provided, which can move up and down under the support of an air blowing bag while protecting the one-way door. The air blowing bag is used to blow air to the arc plate to drive the arc plate to rotate. The ventilation and exhaust effect is achieved by using rainwater and stepping on the filter frame. At the same time, fixed ventilation holes are provided, and the odor filter layer is used to deodorize and then exhaust the gas, so as to avoid polluting the environment and effectively avoid the accumulation of flammable gases such as methane and explosion, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ventilated ductile iron explosion-proof manhole cover, comprising a manhole cover seat, a support groove is arranged at the center of the manhole cover seat, a water inlet device is fixedly connected to the inner circle of the support groove, a filter frame is movably connected in the support groove, ventilation holes are arranged at equal distances on the manhole cover seat, a ventilation duct is arranged at the lower end of the ventilation holes, a ventilation device is arranged in the ventilation duct, the water inlet device comprises a water inlet cylinder, a support frame and a rotating frame, a support frame is arranged at the center of the water inlet cylinder, the lower end of the support frame is movably connected to the rotating frame, the ventilation device comprises a fixed frame, a rotating rod and a toggle suspension, the lower surface of the fixed frame is movably connected to the upper end of the rotating rod, and the lower end of the rotating rod is fixedly connected to the toggle suspension.

[0007] Preferably, blowing airbags are arranged at equal distances in the supporting groove, the upper end of the blowing airbag is fixedly connected to the filter frame, the lower end of the blowing airbag passes through the supporting groove and is fixedly connected to the supporting groove, and the lower end of the blowing airbag is connected to a guide tube, and a return spring is arranged inside the blowing airbag, and the upper and lower ends of the return spring are fixedly connected to the upper and lower ends of the blowing airbag, respectively.

[0008] Preferably, a filter screen is provided at the upper end of the ventilation duct, and an odor filter layer is provided in the ventilation duct below the filter screen, and the odor filter layer is made of activated carbon adsorption material.

[0009] Preferably, a center block is provided inside the water inlet cylinder, a guide plate is provided around the center block, a one-way door is provided at the upper end of the guide plate through damping, the one-way door is abutted against the guide plate, and the lower end of the center block is fixedly connected to the support frame.

[0010] Preferably, arc-shaped plates are connected to the rotating frame at equal distances, the concave direction of the arc-shaped plates matches the inclined direction of the guide plates, and the number of the arc-shaped plates is the same as the number of the guide plates.

[0011] Preferably, the upper surface of the fixing frame abuts against the odor filtering layer, and a ventilation hole is provided on the fixing frame.

[0012] Preferably, a ventilation fan is provided at the position where the rotating rod is placed inside the ventilation duct.

[0013] Preferably, a toggle rod is fixedly connected to one periphery of the toggle suspension, and the toggle rod is placed on the movable path of the arc plate.

[0014] Preferably, a water inlet hole is provided on the upper surface of the filter frame, an inclined surface is provided on the edge of the upper end of the filter frame, water collecting holes are provided at equal distances at the lower end of the inclined surface, and the water collecting holes are inclined, and the higher end of the water collecting hole is flush with the upper surface of the manhole cover seat, and the lower end of the water collecting hole is flush with the upper end of the water inlet cylinder.

[0015] Another technical problem to be solved by the present invention is to provide a method for using a ventilated ductile iron explosion-proof manhole cover, comprising the following steps:

[0016] S1: The return spring supports the air-blowing bag to be filled with gas, and the air-blowing bag props up the filter frame as a whole;

[0017] S2: When passing vehicles or pedestrians step on the filter frame, the filter frame sinks as a whole, squeezing the airbag, causing the return spring in the airbag to contract, and the gas in the airbag to be blown out through the guide tube, pushing the arc plate to move and driving the rotating frame to rotate;

[0018] S3: The arc plate rotates to drive the gas flow in the sewer. At the same time, the arc plate pushes the toggle lever to rotate, and the toggle lever drives the toggle suspension to rotate synchronously. Through the transmission of the rotating rod, the ventilation fan rotates, and negative pressure is generated in the ventilation duct. The gas in the sewer pipe is sucked into the ventilation duct and is discharged after being filtered by the odor filter layer.

[0019] S4: The one-way door blocks the gap between the guide plates to prevent odor from overflowing from the water inlet tube. Rainwater is collected on the one-way door through the water collection hole and the water inlet hole. When the weight of the rainwater exceeds the load-bearing capacity of the one-way door, the one-way door flips downward, and the collected rainwater enters the water inlet tube and impacts the curved plate, which also drives the curved plate to rotate;

[0020] S5: The ventilation fan is driven to rotate by the toggle lever and the rotating rod, and negative pressure is generated in the ventilation duct. The gas in the sewer pipe is sucked into the ventilation duct, filtered by the odor filter layer and then discharged. The odor filter layer is regularly replaced through the ventilation holes above.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: a ventilated ductile iron explosion-proof manhole cover and a method of using the same are provided, wherein a guide plate and a one-way door are abutted against the guide plate, and the one-way door plays a sealing role to prevent odor from overflowing; the guide plate limits the direction of the one-way door, so that rainwater can just hit the concave surface of the curved plate, driving the curved plate to rotate, and the curved plate is used to drive the toggle rod to rotate, so as to realize the rotation of the ventilation fan, and negative pressure is generated in the ventilation duct, and the gas in the sewer pipe is sucked into the ventilation duct and discharged; at the same time, a filter frame is provided, which can protect the one-way door while being able to move up and down under the support of an air-blowing airbag, and the air-blowing airbag is used to blow air to the curved plate to drive the curved plate to rotate; the ventilation and exhaust effect is achieved by using rainwater and stepping on the filter frame, and at the same time, fixed ventilation holes are provided, and the odor filter layer is used to deodorize and then exhaust the gas, so as to avoid polluting the environment and effectively avoid the accumulation of flammable gases such as methane and causing explosions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall structure diagram of the present invention;

[0023] Figure 2 It is a partial cross-sectional view of the present invention;

[0024] Figure 3 It is a structural diagram of the inflatable airbag connection of the present invention;

[0025] Figure 4 It is a structural diagram of the water inlet device of the present invention;

[0026] Figure 5 It is the internal structure diagram of the water inlet cylinder of the present invention;

[0027] Figure 6 It is a structural diagram of the ventilation device of the present invention;

[0028] Figure 7 It is a structural diagram of the filter frame of the present invention.

[0029] In the figure: 1. manhole cover seat; 11. supporting groove; 12. ventilation hole; 13. ventilation duct; 131. filter screen; 132. odor filter layer; 14. blowing airbag; 141. guide tube; 142. reset spring; 2. water inlet device; 21. water inlet cylinder; 211. center block; 212. guide plate; 213. one-way door; 22. supporting frame; 23. rotating frame; 231. arc plate; 3. filter frame; 31. water inlet hole; 32. inclined surface; 33. water collecting hole; 4. ventilation device; 41. fixing frame; 411. ventilation port; 42. rotating rod; 421. ventilation fan; 43. toggle suspension; 431. toggle rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 3 A ventilated ductile iron explosion-proof manhole cover comprises a manhole cover seat 1, a support groove 11 is arranged at the center of the manhole cover seat 1, and air-blowing airbags 14 are arranged at equal distances in the support groove 11, and the upper end of the air-blowing airbag 14 is fixedly connected to the filter frame 3, and the air-blowing airbag 14 is used to support the filter frame 3 so that the filter frame 3 can move up and down in the support groove 11, and the lower end of the air-blowing airbag 14 passes through the support groove 11 and is fixedly connected to the support groove 11, and the lower end of the air-blowing airbag 14 is connected to a guide pipe 141, and the air outlet of the guide pipe 141 is opposite to the concave surface of the arc plate 231, and the air-blowing airbag 14 is not connected to the road surface, and the gas in the air-blowing airbag 14 is the gas in the sewer, and a return spring 142 is arranged inside the air-blowing airbag 14, and the return spring 142 The upper and lower ends are fixedly connected with the upper and lower ends of the blowing airbag 14 respectively. After the filter frame 3 squeezes the blowing airbag 14, the blowing airbag 14 is driven to inflate through the reset spring 142. The inner circle of the support groove 11 is fixedly connected with the water inlet device 2, and the filter frame 3 is movably connected in the support groove 11. Ventilation holes 12 are arranged at equal distances on the manhole cover seat 1, and a ventilation duct 13 is arranged at the lower end of the ventilation hole 12. A ventilation device 4 is arranged in the ventilation duct 13. A filter net 131 is arranged at the upper end of the ventilation duct 13, and an odor filter layer 132 is arranged in the ventilation duct 13 below the filter net 131. The odor filter layer 132 is made of activated carbon adsorption material. The odor filter layer 132 filters the gas in the sewer to prevent the odor from being discharged to the road surface and polluting the environment.

[0032] See also Figure 4-Figure 5The water inlet device 2 includes a water inlet cylinder 21, a support frame 22 and a rotating frame 23. The support frame 22 is arranged at the center of the water inlet cylinder 21. The lower end of the support frame 22 is movably connected with the rotating frame 23. A central block 211 is arranged inside the water inlet cylinder 21. A guide plate 212 is arranged around the central block 211. A one-way door 213 is arranged at the upper end of the guide plate 212 through damping. The one-way door 213 is against the guide plate 212. Under no pressure, the one-way door 213 plays a sealing role to prevent odor from overflowing. When rainwater on the one-way door 213 is collected When there is more rain, the one-way door 213 rotates to discharge rainwater into the water inlet cylinder 21. The lower end of the center block 211 is fixedly connected to the support frame 22. Arc plates 231 are connected to the rotating frame 23 at equal distances. The concave direction of the arc plate 231 matches the inclined direction of the guide plate 212. The guide plate 212 limits the direction of the one-way door 213, so that rainwater can just hit the concave surface of the arc plate 231, driving the arc plate 231 to rotate. The number of arc plates 231 and guide plates 212 is the same, which increases the impact force of the arc plate 231.

[0033] See also Figure 6 The ventilation device 4 includes a fixed frame 41, a rotating rod 42 and a toggle suspension 43. The lower surface of the fixed frame 41 is movably connected to the upper end of the rotating rod 42, and the lower end of the rotating rod 42 is fixedly connected to the toggle suspension 43. The upper surface of the fixed frame 41 is against the odor filtering layer 132. The gas in the sewer passes through the fixed frame 41, is filtered and deodorized by the odor filtering layer 132, and is discharged. A vent 411 is provided on the fixed frame 41, and a ventilation fan 421 is provided at a position where the rotating rod 42 is placed inside the ventilation duct 13. When the ventilation fan 421 rotates, negative pressure can be generated in the ventilation duct 13, and the gas in the sewer is sucked in and then discharged from the ventilation hole 12. A toggle rod 431 is fixedly connected to one circle of the toggle suspension 43, and the toggle rod 431 is placed on the activity path of the arc plate 231. When the arc plate 231 moves, it just drives the toggle rod 431 to rotate, thereby controlling the rotation of the rotating rod 42.

[0034] See also Figure 7 A water inlet hole 31 is provided on the upper surface of the filter frame 3, and an inclined surface 32 is provided on the edge of the upper end of the filter frame 3. The inclined surface 32 serves as a transition to facilitate the passage of vehicles. Water collecting holes 33 are provided at equal distances at the lower end of the inclined surface 32. The water collecting holes 33 are inclinedly arranged. The higher end of the water collecting hole 33 is flush with the upper surface of the manhole cover seat 1, and the lower end of the water collecting hole 33 is flush with the upper end of the water inlet cylinder 21. The water collecting hole 33 is convenient for collecting rainwater on the one-way door 213.

[0035] In order to better demonstrate the use process of the ventilated ductile iron explosion-proof manhole cover, this embodiment now proposes a ventilated ductile iron explosion-proof manhole cover and a method of using the same, including the following steps:

[0036] Step 1: The return spring 142 supports the blowing airbag 14 to be filled with gas, and at the same time, the blowing airbag 14 props up the filter frame 3 as a whole. When the blowing airbag 14 empties the gas, the return spring 142 drives the blowing airbag 14 to be inflated again;

[0037] Step 2: When a passing vehicle or pedestrian steps on the filter frame 3, the filter frame 3 sinks as a whole, squeezing the airbag 14, causing the return spring 142 in the airbag 14 to contract, and the gas in the airbag 14 to be blown out through the guide tube 141, pushing the arc plate 231 to move, and driving the rotating frame 23 to rotate;

[0038] Step 3: The arc plate 231 rotates to drive the gas in the sewer to flow, and at the same time, the arc plate 231 pushes the toggle rod 431 to rotate, and the toggle rod 431 drives the toggle suspension 43 to rotate synchronously. Through the transmission of the rotating rod 42, the ventilation fan 421 rotates, and negative pressure is generated in the ventilation duct 13. The gas in the sewer pipe is sucked into the ventilation duct 13, filtered by the odor filter layer 132, and then discharged;

[0039] Step 4: The one-way door 213 blocks the gap between the guide plates 212 to prevent the odor from overflowing from the water inlet cylinder 21. The rainwater is collected on the one-way door 213 through the water collection hole 33 and the water inlet hole 31. When the weight of the rainwater exceeds the load-bearing capacity of the one-way door 213, the one-way door 213 flips downward, and the collected rainwater enters the water inlet cylinder 21 and impacts the curved plate 231, which also drives the curved plate 231 to rotate.

[0040] Step 5: The ventilation fan 421 is driven to rotate by the toggle rod 431 and the rotating rod 42, and negative pressure is generated in the ventilation duct 13. The gas in the sewer pipe is sucked into the ventilation duct 13, filtered by the odor filter layer 132, and then discharged. The odor filter layer 132 is regularly replaced through the ventilation hole 12 above.

[0041] In summary, the ventilated ductile iron explosion-proof manhole cover and its use method are provided with a guide plate 212 and a one-way door 213. The one-way door 213 is against the guide plate 212, and the one-way door 213 plays a sealing role to prevent the odor from overflowing. The guide plate 212 limits the direction of the one-way door 213, so that rainwater can just hit the concave surface of the curved plate 231, driving the curved plate 231 to rotate, and the curved plate 231 is used to drive the toggle rod 431 to rotate, so as to realize the rotation of the ventilation fan 421, and the ventilation duct 13 is generated. Negative pressure, the gas in the sewer pipe is sucked into the ventilation duct 13 and discharged; at the same time, a filter frame 3 is provided to protect the one-way door 213, and can move up and down under the support of the blowing airbag 14, and the blowing airbag 14 is used to blow air to the arc plate 231 to drive the arc plate 231 to rotate; the ventilation and exhaust effect is achieved by using rainwater and stepping on the filter frame 3, and at the same time, a fixed ventilation hole 12 is provided, and the odor filter layer 132 is used for deodorization and then exhaust to avoid polluting the environment and effectively prevent the accumulation of flammable gases such as methane from exploding.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ventilated ductile iron explosion-proof manhole cover, comprising a manhole cover seat (1), characterized in that: A support groove (11) is provided at the center of the manhole cover seat (1), a water inlet device (2) is fixedly connected to the inner ring of the support groove (11), a filter frame (3) is movably connected in the support groove (11), ventilation holes (12) are provided at equal distances on the manhole cover seat (1), a ventilation duct (13) is provided at the lower end of the ventilation hole (12), a ventilation device (4) is provided in the ventilation duct (13), the water inlet device (2) comprises a water inlet cylinder (21), a support frame (22) and a rotating frame (23), a support frame (22) is provided at the center of the water inlet cylinder (21), the lower end of the support frame (22) is movably connected to the rotating frame (23), the ventilation device (4) comprises a fixed frame (41), a rotating rod (42) and a toggle suspension frame (43), the lower surface of the fixed frame (41) is movably connected to the upper end of the rotating rod (42), and the lower end of the rotating rod (42) is fixedly connected to the toggle suspension frame (43); In the support groove (11), air blowing bags (14) are arranged at equal distances, the upper end of the air blowing bags (14) is fixedly connected to the filter frame (3), the lower end of the air blowing bags (14) passes through the support groove (11) and is fixedly connected to the support groove (11), and the lower end of the air blowing bags (14) is connected to a guide tube (141), and a return spring (142) is arranged inside the air blowing bags (14), and the upper and lower ends of the return spring (142) are respectively fixedly connected to the upper and lower ends of the air blowing bags (14); The water inlet cylinder (21) is provided with a central block (211) inside, a guide plate (212) is provided around the central block (211), a one-way door (213) is provided at the upper end of the guide plate (212) through damping, the one-way door (213) abuts against the guide plate (212), and the lower end of the central block (211) is fixedly connected to the support frame (22); The rotating frame (23) is connected with arc-shaped plates (231) at equal distances, the concave direction of the arc-shaped plates (231) matches the inclined direction of the guide plates (212), and the number of the arc-shaped plates (231) and the number of the guide plates (212) are the same; A filter screen (131) is disposed at the upper end of the ventilation duct (13), and an odor filter layer (132) is disposed in the ventilation duct (13) below the filter screen (131), wherein the odor filter layer (132) is made of an activated carbon adsorption material; The upper surface of the fixing frame (41) is against the odor filtering layer (132), and a ventilation hole (411) is provided on the fixing frame (41); a ventilation fan (421) is provided at a position where the rotating rod (42) is placed inside the ventilation duct (13); a toggle rod (431) is fixedly connected to one periphery of the toggle suspension frame (43), and the toggle rod (431) is placed on the movable path of the arc plate (231).

2. A ventilated ductile iron explosion-proof manhole cover as claimed in claim 1, characterized in that: The upper surface of the filter frame (3) is provided with a water inlet hole (31), the edge of the upper end of the filter frame (3) is provided with an inclined surface (32), the lower end of the inclined surface (32) is provided with water collection holes (33) at equal distances, the water collection holes (33) are arranged obliquely, the higher end of the water collection hole (33) is flush with the upper surface of the manhole cover seat (1), and the lower end of the water collection hole (33) is flush with the upper end of the water inlet cylinder (21).

3. A method for using the ventilated ductile iron explosion-proof manhole cover as claimed in claim 2, characterized in that The following steps are involved: S1: the return spring (142) supports the blowing airbag (14) to be filled with gas, and at the same time, the blowing airbag (14) props up the filter frame (3) as a whole; S2: when a passing vehicle or pedestrian steps on the filter frame (3), the filter frame (3) as a whole sinks, squeezing the blowing airbag (14), the return spring (142) in the blowing airbag (14) contracts, and the gas in the blowing airbag (14) is blown out through the guide tube (141), pushing the arc plate (231) to move its position, driving the rotating frame (23) to rotate; S3: the rotation of the arc plate (231) drives the gas in the sewer to flow, and at the same time, the arc plate (231) drives the toggle rod (431) to rotate, and the toggle rod (431) drives the toggle suspension (43) to rotate synchronously, and through the transmission of the rotating rod (42), the ventilation fan (421) rotates, and negative pressure is generated in the ventilation duct (13), and the gas in the sewer is sucked into the ventilation duct S4: the one-way door (213) blocks the gap between the guide plates (212) to prevent the odor from overflowing from the water inlet cylinder (21). The rainwater is collected on the one-way door (213) through the water collection hole (33) and the water inlet hole (31). When the weight of the rainwater exceeds the load-bearing capacity of the one-way door (213), the one-way door (213) turns downward, and the collected rainwater enters the water inlet cylinder (21) and impacts the arc plate (231), which also drives the arc plate (231) to rotate. S5: the ventilation fan (421) is driven to rotate by the toggle rod (431) and the rotating rod (42), and negative pressure is generated in the ventilation duct (13). The gas in the sewer pipe is sucked into the ventilation duct (13), filtered by the odor filter layer (132), and discharged. The odor filter layer (132) is regularly replaced through the ventilation hole (12) above.

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