Well lid structure and well lid system

Abstract

The utility model relates to a well lid structure and well lid system, including well lid, filter subassembly, exhaust subassembly and decompression subassembly, wherein the filter subassembly of larger volume is horizontally installed on one side of well lid, not only facilitates the whole packing and transportation of well lid structure, but also can make full use of the lateral space of ground well mouth when well lid is installed on ground well, and the well lid is convenient to transport. Structural failure caused by the fact that the filtering assembly is submerged when the underground water level is high is avoided; a plurality of baffles are arranged in the shell of the filtering assembly in a staggered manner to form a zigzag extending gas channel, so that the contact time of waste gas and a filtering material can be prolonged, and the filtering effect is improved; meanwhile, the pressure relief assembly is arranged at the gas inlet end of the filtering assembly, so that when the pressure of waste gas in the ground well is larger than the preset pressure, the pressure relief assembly is automatically opened, the waste gas enters the filtering assembly to be filtered and then is discharged to the outside, environment pollution is avoided, and it is ensured that the pressure in the ground well is within the safe range.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and in particular to a manhole cover structure and manhole cover system. Background Technology

[0002] Waste gas often escapes from manhole covers in sewage tanks and ditches, causing environmental pollution. With increasing emphasis on environmental protection, it will be prohibited for waste gas to escape from manhole covers in sewage tanks and ditches. Because the waste gas in sewage tanks or ditches contains volatile gases and microbial fermentation, the pressure will increase over time. Simply sealing the manhole cover and sewage ditch will result in excessive pressure and poor sealing, which may even cause the manhole cover to be lifted or the sewage pipe to rupture.

[0003] The patent with publication number CN113279431B discloses an automatic exhaust pressure relief and purification safety manhole cover. The entire device adopts a vertical installation method perpendicular to the manhole cover. The length of the entire device in the vertical direction is too large, making packaging and transportation difficult. Moreover, when the groundwater level is high, it is easy to submerge the filter media tank, causing the device to fail. At the same time, the reaction time between the exhaust gas and the filter media is short, resulting in an unsatisfactory filtration effect. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the existing manhole cover structure adopts a vertical installation method that is perpendicular to the manhole cover. The entire device is too long in the vertical direction, which makes packaging and transportation difficult. Moreover, when the groundwater level is high, the filter media tank is easily submerged, causing the device to fail. At the same time, the reaction time between the exhaust gas and the filter media is short, resulting in an unsatisfactory filtration effect.

[0005] To solve the above-mentioned technical problems, this utility model provides a manhole cover structure, including,

[0006] The manhole cover has a groove on one side;

[0007] A filter assembly includes a housing, a filter screen, and baffles. The housing is disposed parallel to the side of the manhole cover away from the groove. The housing includes an internal cavity. The filter screen is disposed in the cavity and divided into an air inlet cavity and a filter cavity arranged in a direction parallel to the manhole cover. The housing has an air inlet and an exhaust port respectively communicating with the air inlet cavity and the filter cavity. The air inlet is perpendicular to the manhole cover. Multiple baffles are alternately arranged in the filter cavity. The multiple baffles form a tortuous air passage extending between the filter screen and the exhaust port. The air passage is filled with filter media.

[0008] An exhaust assembly includes an exhaust pipe, one end of which is connected to the exhaust port and the other end of which extends through the manhole cover into the groove.

[0009] A pressure relief assembly is disposed in the air inlet;

[0010] The manhole cover has two parallel sliding grooves on the side away from the groove. Both sliding grooves are U-shaped and their openings face each other. The shell has two convex plates symmetrically arranged on both sides, and the two convex plates are slidably connected to the openings of the two sliding grooves.

[0011] In one embodiment of this utility model, the orifice of the through hole near the air intake chamber is provided with a chamfer, and a sealing ring corresponding to the position of the chamfer is coaxially provided on the stop block.

[0012] In one embodiment of this utility model, a quick-release fastener is also included. The quick-release fastener includes a quick-lock upper seat and a quick-lock lower seat. One end of the quick-lock lower seat is connected to the exhaust port, and the other end is connected to one end of the quick-lock upper seat via a clamp. The other end of the quick-lock upper seat is connected to one end of the exhaust pipe.

[0013] In one embodiment of the present invention, the exhaust assembly further includes a connecting seat, which is coaxially disposed at the bottom of the groove. The connecting seat has a central through hole, and the end of the exhaust pipe away from the air outlet extends into the central through hole. An exhaust cap is coaxially disposed on the top of the connecting seat.

[0014] In one embodiment of the present invention, a through hole is provided at the bottom of the groove, and the exhaust pipe extends into the groove through the through hole.

[0015] In one embodiment of the present invention, the housing is provided with a material exchange port communicating with the filter chamber, and the housing is connected by fasteners to a material exchange plate for closing the material exchange port.

[0016] In one embodiment of the present invention, the pressure relief assembly includes a sealing seat and a sliding rod. The sealing seat is coaxially disposed in the air inlet. A through hole is coaxially opened on the sealing seat, and an annular boss is coaxially disposed on the inner wall of the through hole. The sliding rod passes through the central hole of the annular boss, and a stop block is coaxially connected to one end of the sliding rod near the air inlet, and a counterweight block is coaxially connected to the other end.

[0017] In one embodiment of this utility model, the manhole cover is provided with multiple lifting holes.

[0018] In one embodiment of this utility model, the counterweight is a ring-shaped sleeve structure, the counterweight is sleeved on the slide rod, and the end of the slide rod away from the air intake chamber is provided with an external thread and screwed with a nut for supporting the counterweight.

[0019] A manhole cover system comprising a manhole cover structure as described in any of the preceding claims.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] This utility model discloses a manhole cover structure and system, comprising a manhole cover, a filter assembly, an exhaust assembly, and a pressure relief assembly. The larger filter assembly is horizontally mounted on one side of the manhole cover, facilitating the overall packaging and transportation of the manhole cover structure. Furthermore, when the manhole cover is installed on the manhole, it fully utilizes the lateral space of the manhole opening, preventing the filter assembly from being submerged and causing structural failure when the groundwater level is high. The filter assembly's internal shell features multiple staggered baffles forming a tortuous air passage, increasing the contact time between the exhaust gas and the filter material and improving the filtration effect. Simultaneously, a pressure relief assembly is installed at the air inlet of the filter assembly. When the exhaust gas pressure inside the manhole exceeds a predetermined pressure, the pressure relief assembly automatically opens, allowing the exhaust gas to enter the filter assembly for filtration before being discharged to the outside, ensuring that the pressure inside the manhole remains within a safe range and preventing environmental pollution. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the manhole cover structure according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the filter assembly of the manhole cover structure according to a preferred embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the convex plate of the manhole cover structure according to a preferred embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the quick-release fastener of the manhole cover structure according to a preferred embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the pressure relief component of the manhole cover structure according to a preferred embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the sliding groove structure of the manhole cover structure according to a preferred embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the manhole cover structure according to a preferred embodiment of the present invention.

[0030] Explanation of reference numerals in the accompanying drawings: 1. Manhole cover; 11. Groove; 12. Lifting hole; 2. Filter assembly; 21. Housing; 211. Air inlet chamber; 212. Filter chamber; 22. Filter screen; 23. Baffle; 24. Material changing plate; 25. Protruding plate; 3. Exhaust assembly; 31. Exhaust pipe; 32. Connecting seat; 33. Exhaust cap; 4. Pressure relief assembly; 41. Sealing seat; 411. Through hole; 412. Annular boss; 42. Slide rod; 43. Stop block; 44. Counterweight block; 45. Sealing ring; 5. Slide groove; 6. Quick-release fastener; 61. Quick-lock upper seat; 62. Quick-lock lower seat; 63. Clamp. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0032] Example 1: Refer to Figures 1-7 As shown, a manhole cover structure of this utility model includes,

[0033] Manhole cover 1, with a groove 11 on one side;

[0034] The filter assembly 2 includes a housing 21, a filter screen 22, and baffles 23. The housing 21 is arranged parallel to the side of the manhole cover 1 away from the groove 11. The housing 21 includes an internal cavity. The filter screen 22 is disposed in the cavity and is divided into an air inlet cavity 211 and a filter cavity 212 arranged in a direction parallel to the manhole cover 1. The housing 21 has an air inlet and an exhaust port that are respectively connected to the air inlet cavity 211 and the filter cavity 212. The air inlet is arranged perpendicular to the manhole cover 1. Multiple baffles 23 are alternately arranged in the filter cavity 212. The multiple baffles 23 form a tortuous air passage between the filter screen 22 and the exhaust port. The air passage is filled with filter material.

[0035] The exhaust assembly 3 includes an exhaust pipe 31, one end of which is connected to an exhaust port, and the other end extends through the manhole cover 1 into the groove 11.

[0036] The pressure relief assembly 4 includes a sealing seat 41 and a slide rod 42. The sealing seat 41 is coaxially disposed in the air inlet. A through hole 411 is coaxially opened on the sealing seat 41, and an annular boss 412 is coaxially disposed on the inner wall of the through hole 411. The slide rod 42 passes through the central hole of the annular boss 412, and a stop block 43 is coaxially connected to one end of the slide rod 42 near the air inlet chamber 211, and a counterweight block 44 is coaxially connected to the other end.

[0037] The slide groove 5 has two parallel slide grooves on the side of the manhole cover 1 away from the groove 11. Both slide grooves 5 are U-shaped grooves with their openings facing each other. Two protruding plates 25 are symmetrically arranged on both sides of the housing 21. The two protruding plates 25 are slidably connected to the openings of the two slide grooves 5 respectively.

[0038] Specifically, the manhole cover 1 is horizontally installed on the recessed platform of the manhole base, and a groove 11 is coaxially formed on the top of the manhole cover 1; the housing 21 of the filter assembly 2 is horizontally connected to the sliding groove at the bottom of the manhole cover 1 through a convex plate, and its position can be adjusted along the sliding groove 5. The housing 21 has a cavity inside, and a filter screen 22 is vertically arranged in the cavity, dividing it into a filter cavity 212 and an air inlet cavity 211 arranged to the left and right. The housing 21 has an exhaust port and an air inlet near its two ends, which are directly connected to the filter cavity 212 and the air inlet cavity 211, respectively. The filter cavity 212 is composed of multiple baffles 23 arranged alternately. An air passage extends in a tortuous manner between the exhaust port and the filter screen 22. The air passage is filled with filter material. The exhaust port is set horizontally, and the air inlet is set vertically (perpendicular to the manhole cover 1). The exhaust port is connected to an exhaust pipe 31 that passes through the manhole cover 1 and extends into the groove 11. A sealing seat 41 is coaxially arranged in the air inlet. A through hole 411 is coaxially opened on the sealing seat 41. An annular boss 412 is coaxially arranged on the inner wall of the through hole 411. A sliding rod 42 is slidably arranged in the center hole of the annular boss 412. A stop block 43 is coaxially connected to one end of the sliding rod 42 near the air inlet chamber 211, and a counterweight block 44 is connected to the other end.

[0039] Under normal conditions, the slide bar 42, under the influence of its own weight, the counterweight 44, and the stop block 43, is positioned at the center hole of the annular boss 412, thus sealing the exhaust gas in the well. When the exhaust gas pressure in the well exceeds the design pressure, i.e., when the exhaust gas pressure can lift the counterweight 44, slide bar 42, and stop block 43 as a whole, the exhaust gas enters the intake chamber 211 through the through hole of the sealing seat 41, and after being filtered by the filter screen 22, it enters the filter chamber 212 and flows along the gas passage. During the flow, the filter material filters and reacts with the exhaust gas, turning it into harmless gas, which is finally discharged to the outside through the exhaust pipe 31, ensuring that the pressure in the well is within a safe range.

[0040] This utility model discloses a manhole cover structure that integrates a filter assembly 2, an exhaust assembly 3, and a pressure relief assembly 4 on the manhole cover 1. The larger filter assembly 2 is horizontally installed on the bottom surface of the manhole cover 1, which not only facilitates the overall packaging and transportation of the manhole cover 1 structure, but also allows the manhole cover 1 to make full use of the lateral space of the manhole opening when installed on the manhole, avoiding the filter assembly 2 from being submerged and causing structural failure when the groundwater level is high. Furthermore, multiple baffles 23 are staggered inside the shell 21 of the filter assembly 2 to form a tortuous and extended air passage, which can increase the contact time between the exhaust gas and the filter material and improve the filtration effect. At the same time, a pressure relief assembly 4 is set at the air inlet end of the filter assembly 2, so that when the exhaust gas pressure in the manhole is greater than a predetermined pressure, the pressure relief assembly 4 automatically opens, allowing the exhaust gas to enter the filter assembly 2 for full filtration before being discharged to the outside, ensuring that the pressure inside the manhole is within a safe range.

[0041] Reference Figure 5 As shown, furthermore, the orifice of the through hole 411 near the intake chamber 211 is chamfered, and a sealing ring 45 corresponding to the chamfer is coaxially provided on the stop block 43. Specifically, when the stop block 43 is in the position of closing the through hole 411 of the sealing seat 41, the top of the stop block 43 presses tightly against the top surface of the annular boss 412 to seal the through hole 411, and the sealing ring 45 sleeved on the stop block 43 fits tightly against the chamfered bevel of the orifice of the through hole 411, further ensuring the sealing effect.

[0042] Reference Figure 4 As shown, it further includes a quick-release fastener 6, which includes a quick-lock upper seat 61 and a quick-lock lower seat 62. One end of the quick-lock lower seat 62 is connected to the exhaust port, and the other end is connected to one end of the quick-lock upper seat 61 via a clamp 63. The other end of the quick-lock upper seat 61 is connected to one end of the exhaust pipe 31. Specifically, both the upper and lower quick-lock seats 61 and 62 have annular protrusions on their connected sides, and the inner wall of the clamp 63 has an annular groove. When the clamp 63 is tightened, it engages the protrusions on the upper and lower quick-lock seats 61 and 62 through the annular groove, thereby connecting the upper and lower quick-lock seats 61 and 62.

[0043] Furthermore, the exhaust assembly 3 also includes a connecting seat 32, which is coaxially disposed at the bottom of the groove 11. The connecting seat 32 is provided with a central through hole, and the end of the exhaust pipe 31 away from the air outlet extends into the central through hole. An exhaust cap 33 is coaxially disposed on the top of the connecting seat 32.

[0044] Reference Figure 7 As shown, a through hole is further provided at the bottom of the groove 11, and the exhaust pipe 31 extends into the groove 11 through the through hole.

[0045] Furthermore, the housing 21 has a material replacement port that communicates with the filter chamber 212, and a material replacement plate 24 for sealing the material replacement port is connected to the housing by fasteners. The filter material inside the housing 21 can be replaced periodically through the material replacement plate 24.

[0046] Furthermore, the manhole cover 1 has multiple lifting holes 12.

[0047] Furthermore, the counterweight 44 is a ring-shaped sleeve structure, fitted onto the slide rod 42. The end of the slide rod 42 furthest from the air intake chamber 211 has an external thread and a nut for supporting the counterweight 44 is screwed onto it. Specifically, when installing the counterweight 44, first fit the counterweight 44 onto the slide rod 42, and then screw the nut onto the end of the slide rod 42 to suspend the counterweight 44 on the slide rod 42. When the design pressure of the device needs to be adjusted, simply unscrew the current nut and replace it with a nut of a different size and thickness.

[0048] Example 2: This utility model also discloses a manhole cover system, including the manhole cover structure as in Example 1.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A manhole cover structure, characterized in that: include, The manhole cover has a groove on one side; A filter assembly includes a housing, a filter screen, and baffles. The housing is disposed parallel to the side of the manhole cover away from the groove. The housing includes an internal cavity. The filter screen is disposed in the cavity and divided into an air inlet cavity and a filter cavity arranged in a direction parallel to the manhole cover. The housing has an air inlet and an exhaust port respectively communicating with the air inlet cavity and the filter cavity. The air inlet is perpendicular to the manhole cover. Multiple baffles are alternately arranged in the filter cavity. The multiple baffles form a tortuous air passage extending between the filter screen and the exhaust port. The air passage is filled with filter media. An exhaust assembly includes an exhaust pipe, one end of which is connected to the exhaust port and the other end of which extends through the manhole cover into the groove. A pressure relief assembly is disposed in the air inlet; The manhole cover has two parallel sliding grooves on the side away from the groove. Both sliding grooves are U-shaped and their openings face each other. The shell has two convex plates symmetrically arranged on both sides, and the two convex plates are slidably connected to the openings of the two sliding grooves.

2. The manhole cover structure according to claim 1, characterized in that: The orifice near the air intake chamber has a chamfer, and a sealing ring corresponding to the position of the chamfer is coaxially provided on the stop block.

3. The manhole cover structure according to claim 1, characterized in that: It also includes quick-release fasteners, which include a quick-lock upper seat and a quick-lock lower seat. One end of the quick-lock lower seat is connected to the exhaust port, and the other end is connected to one end of the quick-lock upper seat via a clamp. The other end of the quick-lock upper seat is connected to one end of the exhaust pipe.

4. The manhole cover structure according to claim 1, characterized in that: The exhaust assembly also includes a connecting seat, which is coaxially disposed at the bottom of the groove. The connecting seat has a central through hole, and the end of the exhaust pipe away from the air outlet extends into the central through hole. An exhaust cap is coaxially disposed on the top of the connecting seat.

5. The manhole cover structure according to claim 1, characterized in that: A through hole is provided at the bottom of the groove, and the exhaust pipe extends into the groove through the through hole.

6. The manhole cover structure according to claim 1, characterized in that: The housing has a material exchange port that communicates with the filter chamber, and the housing is connected by fasteners to a material exchange plate for closing the material exchange port.

7. The manhole cover structure according to claim 1, characterized in that: The pressure relief assembly includes a sealing seat and a sliding rod. The sealing seat is coaxially disposed in the air inlet. A through hole is coaxially opened on the sealing seat, and an annular boss is coaxially disposed on the inner wall of the through hole. The sliding rod passes through the central hole of the annular boss, and a stop block is coaxially connected to one end of the sliding rod near the air inlet, and a counterweight block is coaxially connected to the other end.

8. The manhole cover structure according to claim 1, characterized in that: The manhole cover has multiple lifting holes.

9. The manhole cover structure according to claim 1, characterized in that: The counterweight is a ring-shaped sleeve structure, which is sleeved on the slide rod. The end of the slide rod away from the air intake chamber is provided with an external thread and a nut for supporting the counterweight is screwed on.

10. A manhole cover system, characterized in that: Includes the manhole cover structure as described in any one of claims 1-9.

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