Well lid with biogas concentration detection function

Abstract

The utility model discloses a manhole cover with a methane concentration detection function, which comprises a pre-embedded body, an upper cover body is clamped at the top of the pre-embedded body, a lower cover body is fixedly connected with the bottom of the upper cover body through a connecting block, water inlet holes are uniformly formed in the surface of the upper cover body, and water outlet holes are uniformly formed in the edge part of the lower cover body. An assembling cylinder is integrally formed in the center of the lower cover body, a fan is fixedly assembled in the assembling cylinder, and a control mechanism is detachably and fixedly assembled at the bottom of the assembling cylinder. The cover body is in a plane design, vehicles and pedestrians can pass through the cover body conveniently after assembly is completed, the cover body is suitable for more assembly environments, meanwhile, the lower cover body is designed to be convex in the middle, rainwater can be effectively prevented from flowing backwards into the assembly cylinder in the drainage process, and a fan in the assembly cylinder and a control mechanism below the fan are protected to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically to a manhole cover with biogas concentration detection function. Background Technology

[0002] Manhole covers are used to seal the tops of sewer wells or deep wells in communities or roads. Sewer wells produce methane gas during use, and if the concentration of methane gas exceeds a certain level and comes into contact with an open flame, it can cause an explosion inside the well, posing a safety hazard.

[0003] A Chinese utility model patent with patent number CN215053275U and patent name, entitled "An intelligent well cover with biogas monitoring and emission capability," discloses a technical solution: After setting the biogas detection range, the monitor can monitor the biogas in real time. When the biogas exceeds the predetermined value range, the monitor will send a signal and control the motor to work. The motor drives the output shaft to work, and the output shaft will drive the fan blades to blow air upward, so that the biogas can be discharged through the gas outlet groove, effectively preventing biogas from accumulating in the well and reducing the danger.

[0004] However, the above-mentioned solutions have the following drawbacks in application: the manhole cover has a certain thickness, and the central part protrudes particularly, limiting its application environment. When installed on top of the sewer well, it affects the passage of vehicles and pedestrians, and pedestrians are prone to tripping. Secondly, the fan blades in the above-mentioned solutions are set close to the bottom of the manhole cover. When the fan blades drive the gas in the well to flow upward for gas exchange, it is difficult to discharge the biogas deep in the well upward, resulting in limited biogas emission efficiency. Therefore, we propose a manhole cover with biogas concentration detection function. Utility Model Content

[0005] The purpose of this invention is to provide a well cover with biogas concentration detection function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a well cover with biogas concentration detection function, comprising a pre-embedded body, an upper cover body snapped onto the top of the pre-embedded body, a lower cover body fixedly connected to the bottom of the upper cover body via a connecting block, water inlet holes evenly opened on the surface of the upper cover body, water outlet holes evenly opened on the edge of the lower cover body, an assembly cylinder integrally formed at the center of the lower cover body, a blower fixedly assembled inside the assembly cylinder, and a control mechanism detachably and fixedly assembled at the bottom of the assembly cylinder.

[0007] Preferably, the control mechanism includes an assembly plate, a controller is fixedly mounted at the top center of the assembly plate, a biogas concentration detector is fixedly mounted at the bottom center of the assembly plate, a first connecting pipe and a second connecting pipe are fixedly connected symmetrically at the bottom of the assembly plate, a fixed cylinder is fixedly connected to the bottom of the first connecting pipe and the second connecting pipe respectively, through holes are evenly opened on the side wall of the fixed cylinder, and a solenoid valve is fixedly mounted inside the first connecting pipe.

[0008] Preferably, the length of the second connecting pipe is greater than the length of the first connecting pipe.

[0009] Preferably, the number of connecting blocks is at least four, and the four connecting blocks are evenly distributed in a circle around the center of the cover.

[0010] Preferably, a cover plate is fixedly mounted on the top of the assembly cylinder via a fixed shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are: a well cover with biogas concentration detection function. This utility model first adopts an assembly method in which the upper cover body and the lower cover body are combined. The upper cover body has a flat design, which facilitates the passage of vehicles and pedestrians after assembly and is suitable for more assembly environments. At the same time, the lower cover body adopts a design with a central protrusion, which can effectively prevent rainwater from flowing back into the assembly cylinder during drainage and provide a certain degree of protection for the fan and the control mechanism below the assembly cylinder.

[0012] In this invention, when discharging biogas, a second connecting pipe and a first connecting pipe work together. First, the gas deep inside the well is discharged outward through the second connecting pipe, and then the gas in the shallow part of the well is discharged upward through the first connecting pipe. Compared with the traditional single discharge method, this invention can achieve the discharge of biogas from deep inside the well, thus improving the efficiency of biogas discharge. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the lower cover of this utility model.

[0016] Figure 4 This is a structural diagram showing the assembly position of the fan in this utility model.

[0017] Figure 5 This is a schematic diagram of the control mechanism of this utility model.

[0018] Figure 6 This is a circuit block diagram of the present invention.

[0019] In the diagram: 1. Embedded body; 2. Upper cover; 3. Connecting block; 4. Lower cover; 5. Water inlet; 6. Water outlet; 7. Assembly cylinder; 8. Fan; 9. Fixed shaft; 10. Cover plate; 11. Control mechanism; 111. Assembly plate; 112. Controller; 113. Biogas concentration detector; 114. First connecting pipe; 115. Second connecting pipe; 116. Fixed cylinder; 117. Through hole; 118. Solenoid valve. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This utility model provides a technical solution: a well cover with biogas concentration detection function, including a pre-embedded body 1, which is made of concrete and assembled on the top of a deep well, mainly used for snapping and fixing the well cover. An upper cover 2 is snapped into the pre-embedded body 1. The bottom of the upper cover 2 is fixedly connected to a lower cover 4 through connecting blocks 3. There are at least four connecting blocks 3, which are evenly distributed in a circle around the center of the upper cover 2. Water inlet holes 5 are evenly opened on the surface of the upper cover 2 for rainwater to be discharged into the deep well. Water outlet holes 6 are evenly opened in the lower cover 4 for rainwater entering from the water inlet holes 5 to be discharged downwards.

[0022] like Figure 3 and Figure 4 As shown, an assembly cylinder 7 is integrally formed in the middle of the lower cover 4. A fan 8 is fixedly assembled inside the assembly cylinder 7. The height of the middle position of the lower cover 4 is higher than that of the side position, while the water outlet 6 is opened at the side position of the lower cover 4. The assembly cylinder 7 has a certain height. The lower cover 4, which is set from the middle to the side, can guide rainwater to flow downward through the water outlet 6 at the side position, preventing rainwater from flowing back into the assembly cylinder 7 and affecting the fan 8. The fan 8 is selected with a certain waterproof performance to prevent rainwater from flowing back into the assembly cylinder 7 and damaging the fan 8 during heavy rain. The top of the assembly cylinder 7 is fixedly connected to the cover plate 10 through the fixed shaft 9. The cover plate 10 guides the rainwater entering between the upper cover 2 and the lower cover 4 and blocks the assembly cylinder 7 so that when the rainfall is small, the rainwater can be discharged downward from the position of the water outlet 6.

[0023] like Figure 4As shown, the bottom of the assembly cylinder 7 is detachably and fixedly equipped with a control mechanism 11 by fixing bolts and fixing nuts. The control mechanism 11 can detect the biogas concentration in the well. The control mechanism 11 works in conjunction with the blower 8. When the biogas concentration exceeds the set range, the blower 8 can drive the air in the well to circulate upwards and discharge the biogas to the outside.

[0024] like Figure 5 As shown, the control mechanism 11 includes an assembly plate 111, which is detachably and fixedly mounted on the bottom of the assembly cylinder 7. A controller 112 is fixedly mounted at the center of the assembly plate 111, and a biogas concentration detector 113 is fixedly mounted at the bottom center of the assembly plate 111. The biogas concentration detector 113 is used to detect the concentration of biogas in the well. The output terminal of the biogas concentration detector 113 is electrically connected to the input terminal of the controller 112, and the output terminal of the controller 112 is electrically connected to the input terminal of the blower 8. When the biogas concentration detector 113 detects that the biogas in the well exceeds the set range value, it sends an electrical signal to the controller 112, causing the controller 112 to control the blower 8 to start. The blower 8 drives the gas in the well to circulate upward, thereby achieving the purpose of discharging the biogas in the well.

[0025] The bottom of the assembly plate 111 is symmetrically connected to a first connecting pipe 114 and a second connecting pipe 115. The bottom of the first connecting pipe 114 and the second connecting pipe 115 are respectively fixedly connected to a fixed cylinder 116. The side wall of the fixed cylinder 116 is evenly provided with through holes 117 for gas flow. A solenoid valve 118 is fixedly installed inside the first connecting pipe 114. The input end of the solenoid valve 118 is electrically connected to the output end of the controller 112. The controller 112 can be a single-chip microcomputer controller, which has a timing module inside, which can open the solenoid valve 118 at a time. In this utility model, the solenoid valve 118, the controller 112, the biogas concentration detector 113 and the blower 8 and other electronic components are all electrically connected to an external power source and powered by an external power source. In addition, all electronic components used in this utility model have a certain degree of waterproof performance. In particular, the blower 8 and the controller 112 need to be reinforced with corresponding waterproof treatment to cope with sudden situations during heavy rain.

[0026] The length of the first connecting pipe 114 is less than the length of the second connecting pipe 115. By setting connecting pipes of different lengths, biogas from deeper underground locations can be discharged to the outside, and the concentration of biogas underground can be better regulated.

[0027] Working Principle: This utility model can be applied to deep wells in residential communities as well as on roads. The surface of the upper cover 2 is flat, so it will not affect vehicles passing over it. During use, the biogas concentration detector 113 can detect the biogas concentration in the well. When the biogas concentration exceeds the set value, the biogas concentration detector 113 sends an electrical signal to the controller 112. Then, the controller 112 first controls the blower 8 to start. At this time, the solenoid valve 118 is in the closed state. When the blower 8 is turned on, initially, the gas can only be discharged outward through the fixed cylinder 116 at the bottom of the second connecting pipe 115. The second connecting pipe 115 is located at a relatively deep part of the well. The system prioritizes the discharge of biogas from deeper parts of the well. After the blower 8 has been running for 5 minutes, the controller 112 opens the solenoid valve 118. At this time, the flow chamber of the blower 8 is connected through the first connecting pipe 114. Due to the influence of the first connecting pipe 114, the air flow in the second connecting pipe 115 is reduced. The gas located in the shallower part of the well is mainly discharged through the first connecting pipe 114. When the biogas concentration drops to the set value, the controller 112 closes the blower 8 and the solenoid valve 118. Through the cooperation of the second connecting pipe 115 and the first connecting pipe 114, biogas from multiple locations in multiple wells can be discharged, improving the efficiency of reducing biogas concentration.

[0028] During rainy weather, if the rainfall is light, the rainwater enters from the inlet 5 between the upper cover 2 and the lower cover 4, and is discharged downwards from the outlet 6 through the guide of the cover plate 10 and the lower cover 4. During heavy rain, the rainwater may backflow into the assembly cylinder 7. At this time, since the solenoid valve 118 is in the closed state, the rainwater backflowing into the assembly cylinder 7 can be discharged outwards through the second connecting pipe 115 at the bottom of the assembly plate 111 and then through the fixed cylinder 116. When the rainwater is discharged downwards through the fixed cylinder 116 at the bottom of the second connecting pipe 115, it will not affect the biogas concentration detector 113, thus avoiding affecting the detection accuracy of the biogas concentration detector 113.

Claims

1. A manhole cover with biogas concentration detection function, comprising a pre-embedded body (1), characterized in that: The top of the pre-embedded body (1) is snapped with an upper cover (2), and the bottom of the upper cover (2) is fixedly connected to a lower cover (4) via a connecting block (3). The surface of the upper cover (2) is evenly provided with water inlet holes (5), and the edge of the lower cover (4) is evenly provided with water outlet holes (6). An assembly cylinder (7) is integrally formed at the center of the lower cover (4), and a fan (8) is fixedly assembled inside the assembly cylinder (7). A control mechanism (11) is detachably and fixedly assembled at the bottom of the assembly cylinder (7).

2. A well cover with biogas concentration detection function according to claim 1, characterized in that: The control mechanism (11) includes an assembly plate (111). A controller (112) is fixedly mounted at the top center of the assembly plate (111). A biogas concentration detector (113) is fixedly mounted at the bottom center of the assembly plate (111). A first connecting pipe (114) and a second connecting pipe (115) are fixedly connected to the bottom of the assembly plate (111) in a symmetrical manner. A fixed cylinder (116) is fixedly connected to the bottom of the first connecting pipe (114) and the second connecting pipe (115). Through holes (117) are evenly opened on the side wall of the fixed cylinder (116). A solenoid valve (118) is fixedly mounted inside the first connecting pipe (114).

3. A well cover with biogas concentration detection function according to claim 2, characterized in that: The length of the second connecting pipe (115) is greater than the length of the first connecting pipe (114).

4. A well cover with biogas concentration detection function according to claim 1, characterized in that: The number of connecting blocks (3) is at least four, and the four connecting blocks (3) are evenly distributed in a circle around the center of the cover (2).

5. A well cover with biogas concentration detection function according to claim 1, characterized in that: The top of the assembly cylinder (7) is fixedly fitted with a cover plate (10) via a fixed shaft (9).

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