Inspection well cover device and detection method

Abstract

The invention discloses an inspection well cover device and a detection method. The inspection well cover device comprises an upper cover ring, a well cover and an anti-falling device. The well lid is hinged to the anti-falling device through a hinge. A cavity is formed in the surface of the side, facing the inspection well, of the well lid, a through hole is formed in the surface of the side, facing the inspection well, of the cavity, a sealing device is arranged in the cavity and comprises an upper sealing plate and a lower sealing plate, and a connecting column is connected between the upper sealing plate and the lower sealing plate. A gas pipeline is arranged in the connecting column in the axial direction, a gas inlet hole and a gas outlet hole are formed in the surface of the connecting column, the lower sealing plate is arranged on the through hole, and the upper sealing plate is movably embedded in the well lid. A second sensor is further arranged on the surface of the side, facing the inspection well, of the cavity. The problem that the methane gas cannot be detected due to the fact that the water level overflows the sensor in the prior art is fundamentally solved.

Description

Technical Field

[0001] The invention is used for urban municipal construction, relates to the technical field of manhole covers, and in particular to a manhole cover device and a detection method. Background Art

[0002] During current urban construction, various pipes are buried under urban roads, such as sewer pipes, drainage pipes, gas pipes, tap water pipes, power pipes, heating pipes, etc. These pipes must be equipped with outlets leading to the ground at certain intervals to facilitate exhaust or maintenance. The section from the pipe to the ground is called a manhole. The manhole opening is parallel to the ground. In order to facilitate maintenance and prevent pedestrians from falling, a cover is needed, called a manhole cover.

[0003] The existing manhole cover device needs to mount other terminal devices for detection and data upload when detecting water level, methane, etc., which will increase the investment of additional equipment to a certain extent. In addition, the manhole cover system in the existing technology uses sensors to detect methane gas when detecting methane, and also uses sensors to detect water level when detecting water level. However, the disadvantage of this method is that methane detection cannot be performed when the water level overflows the sensor. In addition, when facing a methane gas leak, the existing manhole cover system cannot transmit the leakage signal to the external platform at the same time to attract the attention of pedestrians and passing vehicles. It is often the platform that receives the leakage signal before reminding pedestrians and passing vehicles, which poses a major safety hazard to pedestrians and passing vehicles.

[0004] In summary, the existing manhole cover device has the following technical problems:

[0005] 1. The existing technology requires additional terminal equipment for detection and data upload during methane detection, which will increase the investment and cost of additional equipment to a certain extent; 2. In the existing technology, methane detection cannot be performed when the water level in the manhole overflows the sensor; 3. The existing technology cannot attract the attention of pedestrians and passing vehicles while transmitting the leakage signal to the external platform. It is often the platform that reminds pedestrians and passing vehicles after receiving the leakage signal, which poses a major safety hazard to pedestrians and passing vehicles; 4. Most manhole covers equipped with anti-fall devices still have a high probability of people falling accidents. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a manhole cover device and a detection method, which solves the problem that methane detection cannot be performed when the water level overflows the sensor in the prior art by setting a sealing device. At the same time, by setting a smoke powder storage bin, the leakage signal can be transmitted to the external platform while attracting the attention of pedestrians and passing vehicles, eliminating the safety hazards of pedestrians and passing vehicles.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a manhole cover device, comprising: an upper cover ring, a manhole cover and an anti-drop device; the manhole cover and the anti-drop device are hingedly connected by a hinge, and the hinge is arranged at the edge of the upper cover ring; when the manhole cover is closed, the anti-drop device is in the manhole, and when the manhole cover is rotated upward, the anti-drop device is rotated upward at the same time, that is, when the manhole cover is opened, the protective device is opened at the same time;

[0009] The anti-fall device comprises a lower cover ring and a telescopic ladder, wherein the lower cover ring is hinged to the manhole cover, the telescopic ladder is fixedly connected to the lower cover ring, a first sensor is installed on one side of the lower cover ring, and the first sensor is far away from the hinge point between the lower cover ring and the manhole cover;

[0010] A cavity is provided on the surface of the manhole cover facing the manhole, a through hole is opened on the surface of the cavity facing the manhole, a sealing device is provided inside the cavity, the sealing device includes an upper sealing plate and a lower sealing plate, a connecting column is connected between the upper sealing plate and the lower sealing plate, a gas pipeline is opened axially inside the connecting column, and an air inlet hole and an air outlet hole are opened on the surface of the connecting column, the lower sealing plate is arranged above the through hole, and the upper sealing plate is movably embedded in the manhole cover; a second sensor is also provided on the surface of the cavity facing the manhole.

[0011] As a further technical solution, the radius of the lower cover ring is equal to the radius of the manhole cover, and the lower cover ring and the manhole cover rotate in the same direction and at the same angle at the same time.

[0012] As a further technical solution, the top of the telescopic ladder is fixedly connected to the edge of the lower cover ring and close to the hinge point between the lower cover ring and the manhole cover; a locking rod is fixedly connected to the lower cover ring, one end of the locking rod is fixedly connected to the edge of the lower cover ring, and the connection point between the locking rod and the lower cover ring and the hinge point between the lower cover ring and the manhole cover are symmetrical.

[0013] As a further technical solution, when the telescopic ladder is in a compressed state, the other end of the locking rod is locked at the bottom of the telescopic ladder, and a first aid kit is installed on the locking rod.

[0014] As a further technical solution, the radius of the lower sealing plate is greater than the radius of the through hole, and the lower sealing plate completely covers and blocks the through hole.

[0015] As a further technical solution, the upper sealing plate, the lower sealing plate and the connecting column are an integrated structure, and the gas pipeline inside the connecting column passes through the upper sealing plate and the connecting column.

[0016] As a further technical solution, a rubber plug is movably connected to a port of the gas pipeline close to the upper sealing plate.

[0017] As a further technical solution, the air outlet is arranged on the surface of the connecting column close to one end of the upper sealing plate, and the air outlet is communicated with the gas pipeline, and the air inlet is arranged on the surface of the connecting column close to one end of the lower sealing plate, and the air inlet is communicated with the gas pipeline.

[0018] As a further technical solution, a smoke powder storage bin is provided in the gas pipeline, and the smoke powder storage bin is between the air inlet and the air outlet, and the smoke powder is colored.

[0019] In a second aspect, the present invention provides a detection method for a manhole cover device as described in the first aspect, comprising: when gas leakage occurs in the manhole, since the manhole cover is in a closed state and the protective device is in a vertical state in the manhole, the first sensor first collects the concentration of the leaked gas deep in the manhole, and obtains a first leakage amount and a first leakage rate; the leaked gas continues to increase and rises to the wellhead, the second sensor collects the concentration of the leaked gas rising to the wellhead and obtains a second leakage amount and a second leakage rate; the concentration of the leaked gas at different depths in the manhole is different, the average of the first leakage amount and the second leakage amount is taken as the final gas leakage amount in the manhole, and the average of the first leakage rate and the second leakage rate is taken as the final gas leakage rate in the manhole.

[0020] One or more technical solutions of the present invention have the following beneficial effects:

[0021] (1) The present invention is provided with a sealing device, which ensures that no water will flow into the manhole. At this time, if there is a methane leak in the manhole, the manhole cover system can still work normally to detect methane gas and upload and report the data, which fundamentally solves the problem in the prior art that methane gas cannot be detected due to the water level overflowing the sensor.

[0022] (2) The first sensor and the second sensor in the present invention are both installed on the manhole cover device, wherein the first sensor is installed on the lower cover ring, and the second sensor is installed on the manhole cover cavity. Unlike the traditional methane sensor that needs to be mounted on the well wall, the benefit of the present invention is that the sensor can be replaced and maintained without going down to the manhole after opening the manhole cover. The first sensor and the second sensor can be driven to the surface after opening the manhole cover, eliminating the safety hazard of going down the well and improving the safety of replacement and maintenance. At the same time, the design of the first sensor and the second sensor solves the problem of needing to set up additional terminal equipment, reducing investment and cost.

[0023] (3) The present invention is provided with a smoke powder storage bin. The colored powder in the smoke powder storage bin will be driven by the flow of gas and will release a gas with color and smell along with the methane gas, attracting the attention of outsiders. This will also remind passers-by and vehicles to pay attention to safety while the signal is transmitted to the platform.

[0024] (4) The anti-drop device designed in the present invention can be activated for protection when the manhole cover is opened, that is, the anti-drop device will be triggered to open when the manhole cover is opened, thereby preventing safety accidents and enhancing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the appearance structure of the manhole cover device of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the manhole cover device of the present invention when viewed from above;

[0028] Figure 3 It is a cross-sectional schematic diagram of the sealing device of the manhole cover device of the present invention;

[0029] Figure 4 It is a schematic diagram of the overall structure of the sealing device of the manhole cover device of the present invention;

[0030] Among them: 1. Manhole cover; 2. Upper cover ring; 3. Handle; 4. Anti-drop device; 5. Hinge; 6. Lower cover ring; 7. Telescopic ladder; 8. First aid kit; 9. First sensor; 10. Locking rod; 11. Sealing device; 12. Second sensor; 13. Cavity; 14. Lower sealing plate; 15. Air inlet; 16. Rubber plug; 17. Air outlet; 18. Upper sealing plate; 19. Connecting column; 20. Smoke powder storage bin. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] Embodiment 1

[0033] The present invention provides a manhole cover device, such as Figure 1As shown in the schematic diagram of the appearance structure of the manhole cover device, the manhole cover device includes an upper cover ring 2, a manhole cover 1 and an anti-drop device 4, wherein the manhole cover 1 and the anti-drop device 4 are hingedly connected by a hinge 5, and the hinge 5 is arranged at the edge of the upper cover ring 2. When the manhole cover 1 is closed, the anti-drop device 4 is in the manhole and in a vertical state. When the manhole cover 1 is rotated upward, the anti-drop device 4 is rotated upward at the same time, that is, when the manhole cover 1 is opened, the protective device 4 is opened at the same time. Specifically: Figure 2 As shown in the schematic diagram of the internal structure of the manhole cover device viewed from above, the anti-fall device 4 includes a lower cover ring 6 and a telescopic ladder 7. The radius of the lower cover ring 6 is equal to the radius of the manhole cover 1. The lower cover ring 6 is hinged to the manhole cover 1, and the lower cover ring 6 and the manhole cover 1 rotate in the same direction and at the same angle at the same time. The telescopic ladder 7 is fixedly connected to the lower cover ring 6. The specific structure is as follows: Figure 2 As shown, the top of the telescopic ladder 7 is fixedly connected to the edge of the lower cover ring 6, and is close to the hinge point between the lower cover ring 6 and the manhole cover 1, and a locking rod 10 is fixedly connected to the lower cover ring 6, one end of the locking rod 10 is fixedly connected to the edge of the lower cover ring 6, and the locking rod 10 is symmetrical with the connection point of the lower cover ring 6 and the hinge point of the lower cover ring 6 and the manhole cover 1. When the telescopic ladder 7 is in a compressed state, the other end of the locking rod 10 is locked at the bottom of the telescopic ladder 7, and a first aid kit 8 is installed on the locking rod 10. If the staff needs to go down the well, they must open the locking rod 10, and must be equipped with a first aid kit 8 to open the telescopic ladder 7 to go down the well, thereby improving the safety of the downhole operation. The anti-drop device can open the protection when the manhole cover is opened, that is, the opening of the anti-drop device will be triggered when the manhole cover is opened, thereby preventing safety accidents and enhancing safety. At the same time, a first sensor 9 is installed on the side of the lower cover ring 6 away from the manhole cover 1, and the first sensor 9 is away from the hinge point between the lower cover ring 6 and the manhole cover 1.

[0034] In this embodiment, if Figure 2 As shown in the schematic diagram of the internal structure of the manhole cover device viewed from above, a cavity 13 is provided on the surface of the manhole cover 1 facing the manhole, a through hole is opened on the surface of the cavity 13 facing the manhole, and a sealing device 11 is provided inside the cavity 13, wherein, as shown in FIG. Figure 3As shown in the cross-sectional schematic diagram of the sealing device, the sealing device 11 includes an upper sealing plate 18 and a lower sealing plate 14, and a connecting column 19 is connected between the upper sealing plate 18 and the lower sealing plate 14. Preferably, the upper sealing plate 18, the lower sealing plate 14 and the connecting column 19 are an integrated structure. A gas pipeline is opened axially inside the connecting column 19, and the gas pipeline inside the connecting column passes through the upper sealing plate and the connecting column, and an air inlet 15 and an air outlet 17 are opened on the surface of the connecting column 19 near one end of the upper sealing plate, and the air outlet is communicated with the gas pipeline, and the air inlet 15 is set on the surface of the connecting column 19 near one end of the lower sealing plate 14, and the air inlet is communicated with the gas pipeline. In this embodiment, since the gas pipeline passes through the upper sealing plate, a rubber plug 16 is movably connected to a port of the gas pipeline near the upper sealing plate. With the rubber plug 16, if the air pressure in the manhole rises rapidly, it will directly break through the safety rubber plug 16, and directly force the exhaust and pressure relief.

[0035] In this embodiment, the lower sealing plate 14 is arranged above the through hole, specifically: the radius of the lower sealing plate 14 is greater than the radius of the through hole, and the lower sealing plate completely covers and blocks the through hole, but the lower sealing plate is not fixedly connected to the inner wall of the cavity; the upper sealing plate 18 is movably embedded in the manhole cover 1, and a second sensor 12 is also arranged on the surface of the cavity 13 facing the manhole. The first sensor 9 and the second sensor 12 are both installed on the manhole cover device, wherein the first sensor is installed on the lower cover ring, and the second sensor is installed on the manhole cover cavity. Different from the traditional methane sensor that needs to be mounted on the well wall, the benefit of such a design in this embodiment is that the sensor can be replaced and maintained without going down to the manhole after the manhole cover is opened, because when the manhole cover is opened, the lower cover ring rises synchronously, so that the first sensor and the second sensor can be driven to the surface after the manhole cover is opened, eliminating the safety hazard of going down the well and improving the safety of replacement and maintenance.

[0036] like Figure 4 As shown, a smoke powder storage bin 20 is provided in the gas pipeline, and the smoke powder storage bin is between the air inlet and the air outlet, and the smoke powder is colored. The colored powder in the smoke powder storage bin will be driven by the flow of gas, and will release colored and odorous gas along with the methane gas, attracting the attention of outsiders. This will remind passers-by and vehicles to pay attention to safety while the signal is transmitted to the platform.

[0037] In this embodiment, the upper cover ring 2 is built with an antenna, which is electrically connected to the first sensor and the second sensor, and is used to transmit the data collected by the first sensor and the second sensor to the background server through a wireless network, thereby solving the problem of needing to set up additional terminal devices and reducing investment and costs. In addition, the antenna is set inside the upper cover ring 2, so that the antenna will not be blocked by the metal manhole cover, and the signal will be significantly enhanced.

[0038] The principle of the sealing device in this embodiment is as follows:

[0039] When there is a gas leak, such as methane gas, the air pressure in the manhole continues to rise, and the leaked methane gas pushes up the lower sealing plate through the through hole. Since the upper sealing plate, the lower sealing plate and the connecting column are an integrated structure, and the upper sealing plate is movably embedded in the manhole cover, the upper sealing plate is pushed out of the manhole cover at this time, and the gas immediately enters the cavity. The gas enters the gas pipeline through the air inlet on the connecting column, driving the smoke powder in the smoke powder storage bin to exhaust and release pressure outside along the gas pipeline through the air outlet, reducing the methane concentration. With the design of the smoke powder storage bin, the smoke powder in the smoke powder storage bin is driven by the flow of gas, and will release gas with color and smell along with the methane gas, attracting the attention of external personnel, which will remind passing personnel and vehicles to pay attention to safety while the data signal is transmitted to the background server. At the same time, if the air pressure rises rapidly, it will directly break through the safety plug 16, directly forcing the exhaust and pressure relief, which can reduce the explosion concentration of methane; at the same time, after the pressure is discharged, the sealing device returns to its original position under gravity and reseals the manhole cover. With the sealing device, when the sealing device is not lifted up, no water will flow into the manhole. At this time, if there is a methane leak in the manhole, the manhole cover device can still work normally to detect methane gas and transmit and report data signals, solving the problem in the prior art that methane gas cannot be detected due to the water level overflowing the sensor.

[0040] Embodiment 2

[0041] In the present embodiment, a detection method for a manhole cover device as in Embodiment 1 is provided, including: when a gas leakage occurs in the manhole, since the manhole cover is in a closed state and the protective device is in a vertical state in the manhole, the first sensor first collects the concentration of the leaked gas deep in the manhole and obtains a first leakage amount and a first leakage rate; the leaked gas continues to increase and rises to the wellhead, the second sensor collects the concentration of the leaked gas rising to the wellhead and obtains a second leakage amount and a second leakage rate; the concentration of the leaked gas at different depths in the manhole is different, the average of the first leakage amount and the second leakage amount is taken as the final gas leakage amount in the manhole, and the average of the first leakage rate and the second leakage rate is taken as the final gas leakage rate in the manhole.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manhole cover device, characterized in that: include: An upper cover ring, a manhole cover and an anti-drop device; the manhole cover and the anti-drop device are hingedly connected by a hinge, and the hinge is arranged at the edge of the upper cover ring; when the manhole cover is closed, the anti-drop device is in the manhole, and when the manhole cover is rotated upward, the anti-drop device is rotated upward at the same time, that is, the protective device is opened at the same time when the manhole cover is opened; The anti-fall device comprises a lower cover ring and a telescopic ladder, wherein the lower cover ring is hinged to the manhole cover, the telescopic ladder is fixedly connected to the lower cover ring, a first sensor is installed on one side of the lower cover ring, and the first sensor is far away from the hinge point between the lower cover ring and the manhole cover; A cavity is provided on the surface of the manhole cover facing the manhole, a through hole is opened on the surface of the cavity facing the manhole, a sealing device is provided inside the cavity, the sealing device includes an upper sealing plate and a lower sealing plate, a connecting column is connected between the upper sealing plate and the lower sealing plate, a gas pipeline is opened axially inside the connecting column, and an air inlet hole and an air outlet hole are opened on the surface of the connecting column, the lower sealing plate is arranged above the through hole, and the upper sealing plate is movably embedded in the manhole cover; a second sensor is also provided on the surface of the cavity facing the manhole.

2. A manhole cover device as claimed in claim 1, characterized in that: The radius of the lower cover ring is equal to the radius of the manhole cover, and the lower cover ring and the manhole cover rotate simultaneously in the same direction and at the same angle.

3. A manhole cover device as claimed in claim 1, characterized in that: The top end of the telescopic ladder is fixedly connected to the edge of the lower cover ring and is close to the hinge point between the lower cover ring and the manhole cover; a locking rod is fixedly connected to the lower cover ring, one end of the locking rod is fixedly connected to the edge of the lower cover ring, and the connection point between the locking rod and the lower cover ring and the hinge point between the lower cover ring and the manhole cover are symmetrical.

4. A manhole cover device as claimed in claim 3, characterized in that: When the telescopic ladder is in a compressed state, the other end of the locking rod is locked at the bottom of the telescopic ladder, and a first aid kit is installed on the locking rod.

5. A manhole cover device as claimed in claim 1, characterized in that: The radius of the lower sealing plate is greater than the radius of the through hole, and the lower sealing plate completely covers and blocks the through hole.

6. A manhole cover device as claimed in claim 1, characterized in that: The upper sealing plate, the lower sealing plate and the connecting column are an integrated structure, and the gas pipeline inside the connecting column runs through the upper sealing plate and the connecting column.

7. A manhole cover device as claimed in claim 6, characterized in that: A rubber plug is movably connected to a port of the gas pipeline close to the upper sealing plate.

8. A manhole cover device as claimed in claim 1, characterized in that: The air outlet hole is arranged on the surface of the connecting column close to one end of the upper sealing plate, and the air outlet hole is communicated with the gas pipeline. The air inlet hole is arranged on the surface of the connecting column close to one end of the lower sealing plate, and the air inlet hole is communicated with the gas pipeline.

9. A manhole cover device as claimed in claim 1, characterized in that: A smoke powder storage bin is provided in the gas pipeline, and the smoke powder storage bin is between the air inlet and the air outlet, and the smoke powder is colored.

10. A method for detecting a manhole cover device according to any one of claims 1 to 9, characterized in that: include: When gas leakage occurs in the manhole, since the manhole cover is in a closed state and the protective device is in a vertical state in the manhole, the first sensor first collects the concentration of the leaked gas deep in the manhole and obtains the first leakage amount and the first leakage rate; the leaked gas continues to increase and rises to the wellhead, and the second sensor collects the concentration of the leaked gas rising to the wellhead and obtains the second leakage amount and the second leakage rate; the concentration of the leaked gas at different depths in the manhole is different, and the average of the first leakage amount and the second leakage amount is taken as the final gas leakage amount in the manhole, and the average of the first leakage rate and the second leakage rate is taken as the final gas leakage rate in the manhole.

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