阅读说明：本技术 一种下水道的检测排险系统 (Detection danger-eliminating system for sewer ) 是由 代兰 李萌 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种下水道的检测排险系统,其包括：井盖组件,包括外框以及设于外框内侧的井盖主体；排气装置,包括第一导气筒、第二导气筒、第一支架、电机、扇叶、燃烧仓和吸收组件,导向装置,包括导管件和导向筒；检测装置,包括第二支架、超声波测距件和气体传感器；排水装置,包括储水箱、支架组件和格栅板；连接装置,包括设于第一支架的滑轮以及绕设于滑轮的拉绳；控制装置,设置于第一导气筒或者第二导气筒上,并与电机、点火器、超声波测距件和气体传感器电连接。通过上述结构能够检测可燃性气体的浓度,当浓度超标时能够将下水道和井道的气体抽出,对可燃性气体进行燃烧处理,并吸收废气中的有毒有害物质,提高安全性。(The invention discloses a detection danger-eliminating system of a sewer, which comprises: the well lid assembly comprises an outer frame and a well lid main body arranged on the inner side of the outer frame; the exhaust device comprises a first air guide cylinder, a second air guide cylinder, a first bracket, a motor, fan blades, a combustion bin and an absorption assembly, and the guide device comprises a guide pipe fitting and a guide cylinder; the detection device comprises a second bracket, an ultrasonic distance measurement piece and a gas sensor; the drainage device comprises a water storage tank, a bracket component and a grid plate; the connecting device comprises a pulley arranged on the first bracket and a pull rope wound on the pulley; and the control device is arranged on the first gas cylinder or the second gas cylinder and is electrically connected with the motor, the igniter, the ultrasonic distance measuring piece and the gas sensor. Can detect combustible gas's concentration through above-mentioned structure, can take out the gas of sewer and well when concentration exceeds standard, carry out combustion treatment to combustible gas to absorb the poisonous and harmful substance in the waste gas, improve the security.)

1. A sewer danger detecting and venting system, comprising:

the well lid assembly comprises an outer frame and a well lid main body arranged on the inner side of the outer frame, wherein a first mounting hole, a first drainage hole and a second mounting hole which are sequentially arranged are formed in the well lid main body;

the exhaust device comprises a first air guide cylinder, a second air guide cylinder, a first bracket, a motor, fan blades, a combustion chamber and an absorption assembly, the first gas cylinder is positioned below the second gas cylinder, the bottom of the first gas cylinder is inserted into the first mounting hole, the top of the first gas cylinder is provided with a closing section, the outer side of the first gas cylinder is provided with a first mounting plate extending to the upper part of the well lid main body, the closing section extends into the inner cavity of the second gas cylinder, so as to form an injection channel between the outer side wall of the closing section and the inner side wall of the second gas cylinder, the first bracket is arranged in the first gas cylinder, the motor is arranged on the first bracket, the fan blades are arranged into two parts which are respectively arranged in the inner cavity of the second gas cylinder and the inner cavity of the first gas cylinder, the two fan blades are connected with the rotating shaft, the combustion chamber is arranged at the top of the second gas cylinder, the igniter is arranged on the inner side of the combustion chamber, and the absorption assembly is connected with the combustion chamber;

the guide device comprises a guide pipe fitting and a guide cylinder, the guide pipe fitting is vertically arranged on the inner side of the bottom of the first guide cylinder, a second mounting plate and a guide groove communicated with the inner cavity of the guide pipe fitting are arranged on the outer side wall of the guide pipe fitting, the guide groove is vertically arranged, the first mounting plate, the second mounting plate and the well lid main body are connected through a first bolt, and the guide cylinder is inserted into the second mounting hole;

the detection device comprises a second support, an ultrasonic distance measurement piece and a gas sensor, wherein the second support is positioned below the first support and is arranged on the pipe guide piece in a sliding manner, and the ultrasonic distance measurement piece and the gas sensor are arranged at the bottom of the second support;

the drainage device comprises a water storage tank, a support assembly and a grating plate, wherein the water storage tank is inserted into a first drainage hole, the bottom of the water storage tank is provided with a water leakage hole, the support assembly comprises a first guide frame and a second guide frame which are respectively arranged on two sides of the water storage tank, the first guide frame is slidably sleeved on the guide pipe fitting and is provided with a guide part penetrating through the guide groove, the second guide frame is slidably sleeved on the guide cylinder, and the grating plate is fixedly arranged at the top of the water storage tank;

the connecting device comprises a pulley arranged on the first support and a pull rope wound on the pulley, one end of the pull rope is connected with the second support, and the other end of the pull rope extends into the guide pipe fitting and is connected with the guide part;

and the control device is arranged on the first gas cylinder or the second gas cylinder and is electrically connected with the motor, the igniter, the ultrasonic distance measuring piece and the gas sensor.

2. The sewer system according to claim 1, wherein the pipe guide is sleeved with a stop nut, and the stop nut is located below the first guide frame.

3. The sewer detecting and danger-eliminating system according to claim 1, wherein an exhaust pipe is disposed at the top of the burning bin, a V-shaped guide plate is disposed on the inner wall of the burning bin, and the guide plate is located below the exhaust pipe.

4. The sewer detection and danger elimination system according to claim 3, wherein the absorption assembly comprises an air pipe, an absorption box and an activated carbon plate, one end of the air pipe is connected to the exhaust pipe, the other end of the air pipe is connected to the left side of the absorption box, an air outlet is arranged on the right side of the absorption box, a box door is arranged on the front side of the absorption box, clamping grooves are formed in the upper side and the lower side of an inner cavity of the absorption box, and the activated carbon plate is slidably inserted into the clamping grooves.

5. The sewer detecting and danger-eliminating system according to claim 1, wherein the pipe guiding members are arranged in two and are respectively arranged at two sides of the second bracket, the two sides of the second bracket are respectively provided with a wheel carrier, the wheel carrier is rotatably provided with a guiding grooved wheel, and the guiding grooved wheel is arranged on the pipe guiding members in a rolling manner.

6. The sewer detecting and danger-eliminating system according to claim 1 or 5, wherein the conduit member has two of the second mounting plates arranged up and down, one of the second mounting plates extends out of the first gas cylinder and is located above the first mounting plate, the other second mounting plate is located below the manhole cover body, the first bolt is inserted through the first mounting plate, the manhole cover body and the two second mounting plates, and a first nut is mounted at the end of the first bolt.

7. The sewer detecting and danger-eliminating system of claim 1, wherein the top of the guiding cylinder has a third mounting plate extending above the manhole cover main body, and the third mounting plate is connected with the manhole cover main body through a second bolt.

8. The sewer detecting and danger-eliminating system of claim 1, wherein the manhole cover body is further provided with a second drainage hole.

9. The sewer system according to claim 1 or 8, wherein the first drainage hole is narrow at the top and wide at the bottom.

10. The sewer system according to claim 1, wherein the control device comprises a main control module and a wireless communication module, and the wireless communication module, the motor, the igniter, the ultrasonic distance measuring device and the gas sensor are electrically connected to the main control module.

Technical Field

The invention relates to the field of environment-friendly detection and treatment equipment, in particular to a detection and danger-elimination system of a sewer.

Background

The internal environment of the sewer is generally poor, and sewage, sundries and various microorganisms exist in the sewer, so that toxic and harmful gases such as methane, hydrogen sulfide, ammonia gas and the like can exist in the sewer. The odor of the gas in the sewer is very large, part of the gas also belongs to combustible gas, and when the concentration of the combustible gas reaches a certain range, deflagration is easily generated when the gas meets open fire or high temperature, so that some safety accidents are caused. In addition, the well has generally been arranged to the sewer, and the well lid has been arranged at the top of well, has the wash port on the well lid, and this kind of well lid can not in time be discharged ponding when the precipitation is big, leads to the water level to rise to cause the waterlogging, if will increase displacement then need the manual work to lift the well lid, exposes the well, but the operation of lifting the well lid is convenient inadequately, and manual operation's intensity of labour is great, and then makes the discharge of ponding have inconveniently.

Disclosure of Invention

The invention aims to provide a detection and danger-elimination system of a sewer, which can detect and treat combustible gas in the sewer, can automatically adjust and increase water discharge amount when water is accumulated, and reduces urban waterlogging.

To achieve the above object, there is provided a sewer danger detecting and discharging system, including:

the well lid assembly comprises an outer frame and a well lid main body arranged on the inner side of the outer frame, wherein a first mounting hole, a first drainage hole and a second mounting hole which are sequentially arranged are formed in the well lid main body;

the exhaust device comprises a first air guide cylinder, a second air guide cylinder, a first bracket, a motor, fan blades, a combustion chamber and an absorption assembly, the first gas cylinder is positioned below the second gas cylinder, the bottom of the first gas cylinder is inserted into the first mounting hole, the top of the first gas cylinder is provided with a closing section, the outer side of the first gas cylinder is provided with a first mounting plate extending to the upper part of the well lid main body, the closing section extends into the inner cavity of the second gas cylinder, so as to form an injection channel between the outer side wall of the closing section and the inner side wall of the second gas cylinder, the first bracket is arranged in the first gas cylinder, the motor is arranged on the first bracket, the fan blades are arranged into two parts which are respectively arranged in the inner cavity of the second gas cylinder and the inner cavity of the first gas cylinder, the two fan blades are connected with the rotating shaft, the combustion chamber is arranged at the top of the second gas cylinder, the igniter is arranged on the inner side of the combustion chamber, and the absorption assembly is connected with the combustion chamber;

the guide device comprises a guide pipe fitting and a guide cylinder, the guide pipe fitting is vertically arranged on the inner side of the bottom of the first guide cylinder, a second mounting plate and a guide groove communicated with the inner cavity of the guide pipe fitting are arranged on the outer side wall of the guide pipe fitting, the guide groove is vertically arranged, the first mounting plate, the second mounting plate and the well lid main body are connected through a first bolt, and the guide cylinder is inserted into the second mounting hole;

the detection device comprises a second support, an ultrasonic distance measurement piece and a gas sensor, wherein the second support is positioned below the first support and is arranged on the pipe guide piece in a sliding manner, and the ultrasonic distance measurement piece and the gas sensor are arranged at the bottom of the second support;

the drainage device comprises a water storage tank, a support assembly and a grating plate, wherein the water storage tank is inserted into a first drainage hole, the bottom of the water storage tank is provided with a water leakage hole, the support assembly comprises a first guide frame and a second guide frame which are respectively arranged on two sides of the water storage tank, the first guide frame is slidably sleeved on the guide pipe fitting and is provided with a guide part penetrating through the guide groove, the second guide frame is slidably sleeved on the guide cylinder, and the grating plate is fixedly arranged at the top of the water storage tank;

the connecting device comprises a pulley arranged on the first support and a pull rope wound on the pulley, one end of the pull rope is connected with the second support, and the other end of the pull rope extends into the guide pipe fitting and is connected with the guide part;

and the control device is arranged on the first gas cylinder or the second gas cylinder and is electrically connected with the motor, the igniter, the ultrasonic distance measuring piece and the gas sensor.

According to the sewer detection danger-eliminating system, the guide pipe fitting is sleeved with the limiting nut, and the limiting nut is located below the first guide frame.

According to the sewer detection danger-eliminating system, the exhaust pipe is arranged at the top of the combustion chamber, the V-shaped guide plate is arranged on the inner wall of the combustion chamber, and the guide plate is located below the exhaust pipe.

According to a detection danger eliminating system of sewer, the absorption subassembly includes tuber pipe, absorption box and active carbon board, the one end of tuber pipe is connected in the blast pipe, and the other end is connected in the left side of absorption box, the right side of absorption box is provided with the air outlet, the front side of absorption box is provided with the chamber door, the upper and lower both sides of absorption box inner chamber all are provided with the draw-in groove, the active carbon board slides and inserts and locates the draw-in groove.

According to the sewer detection danger-eliminating system, the two guide pipe pieces are arranged on two sides of the second support respectively, wheel carriers are arranged on two sides of the second support, guide grooved wheels are arranged on the wheel carriers in a rotating mode, and the guide grooved wheels are arranged on the guide pipe pieces in a rolling mode.

According to a detection danger eliminating system of sewer, have on the pipe fitting and be two of arranging from top to bottom the second mounting panel, one of them second mounting panel stretches out first gas cylinder and is located the top of first mounting panel, and another second mounting panel is located the below of well lid main part, first mounting panel, well lid main part and two second mounting panels are worn to locate by first bolt to first nut is installed in the tip.

According to the detection danger eliminating system of the sewer, the top of the guide cylinder is provided with a third mounting plate extending above the well lid main body, and the third mounting plate is connected with the well lid main body through a second bolt.

According to the sewer detection danger-eliminating system, a second drainage hole is further formed in the well cover main body.

According to the sewer detection danger-eliminating system, the first drainage hole is narrow at the top and wide at the bottom.

According to the sewer detection danger eliminating system, the control device comprises a main control module and a wireless communication module, and the wireless communication module, the motor, the igniter, the ultrasonic distance measuring piece and the gas sensor are all electrically connected with the main control module.

The scheme has at least one of the following beneficial effects:

1. the concentration of the combustible gas can be detected through the gas sensor, the exhaust device and the control device, when the concentration exceeds the standard, the gas in a sewer and a well can be pumped out, the combustible gas is combusted, toxic and harmful substances in waste gas are absorbed, and the deflagration accident caused by overhigh concentration of the combustible gas is avoided; fresh air can be supplemented into the second gas guide cylinder and the combustion bin through the injection channel, so that combustion of the combustible gas can be supported, the full combustion of the combustible gas is ensured, the concentration of the combustible gas in the combustion bin is reduced, and the safety is improved;

2. the number of the fan blades is two, the fan blades positioned in the first gas cylinder can drive the gas in the first gas cylinder to form high-speed airflow to enter the second gas cylinder, and the fan blades positioned in the second gas cylinder can drive the air to flow upwards so as to avoid downward overflow of the combusted waste gas;

3. the guide cylinder can be inserted with a probe rod, the water flow depth and the sludge layer depth in a sewer can be measured and calculated through the matching of the probe rod and the ultrasonic ranging part, and the guide cylinder can guide the drainage device and the probe rod simultaneously;

4. through the drainage device, the connecting device and the detection device, when accumulated water is more, the water storage tank can automatically descend so as to automatically adjust and increase the drainage quantity of the well lid main body and reduce urban waterlogging; and the first support can automatically rise to the first gas cylinder under the action of the pull rope, so that the ultrasonic distance measuring piece and the gas sensor) are prevented from being damaged due to the impact of water flow rushed from the outside.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a cross-sectional view of a first embodiment of the present invention;

FIG. 2 is an enlarged view of portion A shown in FIG. 1;

FIG. 3 is a top view of the well lid assembly in a first embodiment of the present invention;

FIG. 4 is a cross-sectional view of a first gas cartridge in accordance with a first embodiment of the present invention;

FIG. 5 is a block diagram of a circuit in a first embodiment of the invention;

FIG. 6 is a top view of a drain in accordance with a first embodiment of the present invention;

FIG. 7 is a view showing the structure of a pipe guide in the first embodiment of the present invention;

FIG. 8 is a block diagram of a detecting unit according to a first embodiment of the present invention;

FIG. 9 is a cross-sectional view of an absorbent assembly in a second embodiment of the present invention;

fig. 10 is a top view of a drain in a second embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, greater than, less than, exceeding, etc. are understood as excluding the present numbers, and the above, below, inside, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 8, a detecting and danger-eliminating system for a sewage drain includes a well cover assembly 10, an exhaust device 20, a guide device, a detecting device 40, a drainage device 50, a connecting device 60, and a control device 70. Wherein, well lid subassembly 10 includes frame 11 and sets up in the inboard well lid main part 12 of frame 11, has seted up first mounting hole 121, second mounting hole 122, first drain hole 123 and second drain hole 124 on the well lid main part 12, and first mounting hole 121, first drain hole 123 and second mounting hole 122 are arranged in proper order.

The air discharging device 20 comprises a first air guide cylinder 21, a second air guide cylinder 22, a first support 23, a motor 24, fan blades 25, a combustion chamber 26 and an absorption assembly 27, wherein the first air guide cylinder 21 is positioned below the second air guide cylinder 22, and a support rod 221 is connected between the first air guide cylinder 21 and the second air guide cylinder 22. The bottom of the first gas cylinder 21 is inserted into the first mounting hole 121, the top of the first gas cylinder 21 is provided with a closing section 211, the inner cavity of the closing section 211 is narrow at the top and wide at the bottom, and the outer side of the first gas cylinder 21 is provided with a first mounting plate 212 extending to the upper part of the well lid main body 12. Specifically, the first mounting plates 212 are provided in four and are equally spaced around the first gas cylinder 21. The closing section 211 extends into the inner cavity of the second gas cylinder 22, so that an injection passage 213 is formed between the outer side wall of the closing section 211 and the inner side wall of the second gas cylinder 22. The first bracket 23 is disposed in the first gas cylinder 21, the motor 24 is disposed on the first bracket 23, and an output end of the motor 24 is connected to the rotating shaft 241. The two fan blades 25 are respectively arranged in the inner cavity of the second gas cylinder 22 and the inner cavity of the first gas cylinder 21, specifically, the two fan blades 25 are respectively arranged on the upper side and the lower side of the closing section 211, and the two fan blades 25 are both connected with the rotating shaft 241. The combustion chamber 26 is disposed on the top of the second gas cylinder 22, the igniter 261 is disposed inside the combustion chamber 26, and the absorption assembly 27 is connected to the combustion chamber 26.

The guiding device comprises a guiding pipe piece 31 and a guiding cylinder 32, the guiding pipe piece 31 is vertically arranged on the inner side of the bottom of the first guiding cylinder 21, a second mounting plate 311 and a guiding groove 312 communicated with the inner cavity of the guiding pipe piece 31 are arranged on the outer side wall of the guiding pipe piece 31, the guiding groove 312 is vertically arranged, the first mounting plate 212, the second mounting plate 311 and the well lid main body 12 are connected through a first bolt, and the guiding cylinder 32 is inserted into the second mounting hole 122. The detecting device 40 includes a second bracket 41, an ultrasonic ranging unit 42 and a gas sensor 43, the second bracket 41 is located below the first bracket 23, the second bracket 41 is slidably disposed on the pipe member 31, and the ultrasonic ranging unit 42 and the gas sensor 43 are disposed at the bottom of the second bracket 41. The drainage device 50 includes a water storage tank 51, a bracket assembly and a grid plate 53, the water storage tank 51 is inserted into the first drainage hole 123, the bottom of the water storage tank 51 is provided with a drainage hole 511, the bracket assembly includes a first guide frame 521 and a second guide frame 522 which are respectively arranged at two sides of the water storage tank 51, the first guide frame 521 is slidably sleeved on the guide pipe 31, the second guide frame 522 is slidably sleeved on the guide cylinder 32, namely, the first guide frame 521 is provided with a first guide hole 5211, the guide pipe 31 is inserted into the first guide hole 5211, the second guide frame 522 is provided with a second guide hole 5221, and the guide cylinder 32 is inserted into the second guide hole 5221. The first guide frame 521 has a guide portion 523 passing through the guide groove 312, and the grating plate 53 is fixedly disposed on the top of the water tank 51.

The connecting device 60 includes a pulley 61 disposed on the first bracket 23 and a pull rope 62 wound around the pulley 61, one end of the pull rope 62 is connected to the second bracket 41, and the other end of the pull rope 62 extends into the guide pipe member 31 and is connected to the guide portion 523. The control device 70 is provided on the first gas cylinder 21, and the control device 70 is electrically connected to the motor 24, the igniter 261, the ultrasonic distance measuring unit 42, and the gas sensor 43.

During assembly, the manhole cover assembly 10 is mounted at the top opening of the hoistway, the water storage tank 51 is stopped against the bottom surface of the manhole cover main body 12, the second support 41 extends downwards to the first gas cylinder 21, so that the ultrasonic distance measuring piece 42 and the gas sensor 43 also extend out of the first gas cylinder 21, the gas flow in the hoistway is more than that in the first gas cylinder 21, and the measurement accuracy of the gas sensor 43 is improved. At the same time, the height difference between the ultrasonic range finder 42 and the top edge of the guide cylinder 32 is measured. When the gas sensor 43 works, the concentration of the combustible gas in the shaft is detected by the gas sensor 43 and the detected value is fed back to the control device 70, when the concentration is detected to exceed the standard, the control device 70 controls the motor 24 and the igniter 261 to be started, the two fan blades 25 are operated to blow the gas in the shaft and the sewer into the second gas cylinder 22 at high speed, the high-speed gas flow can enable the second gas cylinder 22 to form a negative pressure area, so that the outside air can enter the second gas cylinder 22 to be mixed with the high-speed gas flow, the mixed gas enters the combustion bin 26, the combustible gas is ignited and combusted through the igniter 261, and the combusted waste gas enters the absorption assembly 27. The ultrasonic ranging piece 42 emits ultrasonic waves downwards, the ultrasonic waves encounter the water surface and a sludge layer in a sewer and respectively generate reflection, the distance between the sludge layer and the ultrasonic ranging piece 42 and the distance between the water surface and the ultrasonic ranging piece 42 can be calculated according to the two reflections, and the difference value of the two distances is the water flow depth; the guide cylinder 32 can be inserted with a measuring rod with scales, the measuring rod moves downwards to stop against the bottom of the pipe wall of the sewer, the scale value on the measuring rod corresponding to the top edge of the guide cylinder 32 is observed, the inserting depth of the measuring rod can be obtained, and the depth of the sludge layer can be measured by combining the height difference between the ultrasonic distance measuring piece 42 and the top edge of the guide cylinder 32 and the distance between the sludge layer and the ultrasonic distance measuring piece 42. The through-flow cross-sectional area of the water flow in the sewer can be known by knowing the depth and the water depth of the sludge layer and the inner diameter of the sewer. Wherein the guide cylinder 32 can guide the movement of the probe and the water storage tank 51.

When the rain falls and water is accumulated, the accumulated water can flow into the water storage tank 51 through the grid plate 53, if the accumulated water is less, the water flowing into the water storage tank 51 can be quickly and timely discharged through the water leakage hole 511, and the water level in the water storage tank 51 is very low; if ponding is more, then the ponding that flows into in the storage water tank 51 can not in time be discharged, and the water level in the storage water tank 51 rises, and under the action of gravity, storage water tank 51 moves down and makes first drainage hole 123 open for external ponding can be fast, gush in a large number, has improved the displacement, and simultaneously, second support 41 moves up under the effect of stay cord 62 in to first gas cylinder 21, avoids ultrasonic ranging spare 42 and gas sensor 43 to receive the rivers impact that the external world gushed and causes the damage.

Wherein, the gaseous oxygen content in the sewer is general less, and the gas mobility in the sewer is not good, consequently probably has the condition that local position combustible gas concentration in the sewer reaches detonation concentration, can follow the external world through above-mentioned structure and mend fresh air to combustion-supporting is carried out to combustible gas in combustion chamber 26, ensures that combustible gas burns completely, and can avoid getting into the combustible gas concentration in combustion chamber 26 and reach detonation concentration, improves the security.

The guide pipe piece 31 is sleeved with a limiting nut 33, the limiting nut 33 is located below the first guide frame 521, and the limiting nut 33 is in threaded fit connection with the guide pipe piece 31 to prevent the first guide frame 521 from sliding away from the guide pipe piece 31.

An exhaust pipe 262 is arranged at the top of the combustion chamber 26, a V-shaped flow guide plate 263 is arranged on the inner wall of the combustion chamber 26, and the flow guide plate 263 is located below the exhaust pipe 262. With this structure, the gas entering the combustion chamber 26 can be prevented from directly flowing into the exhaust pipe 262, and the combustible gas can be sufficiently combusted.

The absorption assembly 27 comprises an air pipe 271, an absorption box 272 and an activated carbon plate 273, one end of the air pipe 271 is connected to the exhaust pipe 262, the other end of the air pipe 271 is connected to the left side of the absorption box 272, the right side of the absorption box 272 is provided with an air outlet 274, the front side of the absorption box 272 is provided with a box door, the upper side and the lower side of the inner cavity of the absorption box 272 are provided with clamping grooves, and the activated carbon plate 273 is slidably inserted into the clamping grooves. The harmful component in the waste gas can be absorbed to the activated carbon plate 273, and open the chamber door can be comparatively convenient with the dismouting change of activated carbon plate 273.

The pipe guiding members 31 are arranged in two and are respectively arranged at two sides of the second bracket 41, the wheel frames 411 are rotatably provided with the guide sheaves 412, and the guide sheaves 412 are arranged on the pipe guiding members 31 in a rolling manner, so that the second bracket 41 can be arranged on the pipe guiding members 31 in a sliding manner, and the sliding resistance of the second bracket 41 is small.

The guide pipe member 31 is provided with two second mounting plates 311 which are arranged up and down, one of the second mounting plates 311 extends out of the first gas cylinder 21, the second mounting plate 311 is positioned above the first mounting plate 212, the other second mounting plate 311 is positioned below the well lid main body 12, the first bolt penetrates through the first mounting plate 212, the well lid main body 12 and the two second mounting plates 311, and a first nut is mounted at the end of the first bolt, so that the first mounting plate 212 and the second mounting plate 311 can be connected with the well lid main body 12, and the stability of the guide pipe member 31 is high.

The top of guide cylinder 32 has third mounting panel 321, and third mounting panel 321 extends to well lid main part 12 top, and third mounting panel 321 passes through the second bolted connection with well lid main part 12. Specifically, the second bolt passes through the third mounting plate 321 and the manhole cover body 12, and a second nut is mounted at an end of the second bolt.

A second drain hole 124 is also provided on the well lid body 12 to further facilitate drainage. Specifically, the second water discharge holes 124 are provided in plurality and arranged around the first mounting hole 121. The first drain hole 123 is narrow at the top and wide at the bottom, and correspondingly, the top of the water storage tank 51 is also narrow at the top and wide at the bottom, so that the water storage tank 51 can move up and be inserted into the first drain hole 123.

The control device 70 comprises a main control module 71 and a wireless communication module 72, wherein the wireless communication module 72, the motor 24, the igniter 261, the ultrasonic distance measuring piece 42 and the gas sensor 43 are all electrically connected with the main control module 71. And communicates with an external server through the wireless communication module 72 to receive a control signal and feed back the total time of the activation of the motor 24 and the concentration of the combustible gas detected by the gas sensor 43. If the total time of activation of the motor 24 exceeds a certain value, the person is scheduled to replace the activated carbon plate 273 to ensure the absorbent capacity of the absorbent assembly.

In some embodiments, the control device 70 may also be disposed on the second gas cartridge 22.

Referring to fig. 9, in some embodiments, the absorption modules 27 are provided with two absorption tanks 272 connected in series by pipes, wherein the bottom of the inner cavity of one absorption tank 272 is provided with a water distribution pipe 275, the end of the water distribution pipe 275 is connected with an air pipe 271, the top of the water distribution pipe 275 is provided with water distribution holes, a liquid such as water is provided in the absorption tank 272 to absorb the ammonia and the combustion products of hydrogen sulfide, and activated carbon particles are provided in the other absorption tank 272 to absorb the residual toxic and harmful gases.

Referring to fig. 10, in some embodiments, two first sheaves 524 may be spaced inside the first guide hole 5211, two second sheaves 525 may be spaced inside the second guide hole 5221, the guide pipe member 31 is located between the two first sheaves 524, and the guide cylinder 32 is located between the two second sheaves 525 to further reduce the sliding resistance of the drain 50.

The bottom of the combustion chamber 26 has a slot into which the top of the second gas cylinder 22 is inserted to align the second gas cylinder 22 with the combustion chamber 26.

The combustion chamber 26 can be made of transparent material such as glass, and can generate light when the combustible gas is combusted, and can play the effects of illumination and light decoration at night.

In the above embodiment, the first gas cylinder 21, the guide cylinder 32 and the water storage tank 51 are all inserted and aligned with the manhole cover body 12, and the manhole cover body 12 can be obtained by using the existing manhole cover through the processing steps of cutting, drilling and the like, without a die specially used for manufacturing the manhole cover body 12, and the existing manhole cover is fully utilized.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.