Gas leakage monitor installed on inspection well

Abstract

The utility model belongs to the field of gas detection equipment, and particularly relates to a gas leakage monitor mounted on an inspection well, which comprises a shell, a laser sensor and an antenna. The lower end of the shell is fixedly connected with the laser sensor and the floating ball switch. Through the structural design of the laser sensor, the circuit board, the floating ball switch and the antenna, when a fuel gas pipeline or a valve leaks, fuel gas can diffuse along an underground adjacent space and gather at a cellar well, at the moment, the device installed on the well lid carries out detection through the laser sensor, data are calculated and analyzed through the circuit board, and the fuel gas pipeline or the valve leaks. The method comprises the following steps: collecting gas concentration of a manhole cover, wirelessly and remotely transmitting the current gas concentration to a background, if the gas concentration is increased to a set threshold value, sending an alarm signal through a circuit board and uploading position information, and if the gas concentration does not exceed the threshold value, continuously carrying out on-line monitoring through a laser sensor and uploading data, so that the gas leakage condition under the manhole cover can be accurately monitored in real time, and an alarm is given in time; and entering and exiting of constructors in the well are not affected.

Description

Technical Field

[0001] The utility model relates to the field of gas detection equipment, in particular to a gas leakage monitor installed on a manhole. Background Art

[0002] Gas pipelines pass through multiple channels underground in the city, including various sealed manholes. When the pipeline ruptures or the connection becomes loose, gas (especially methane) may leak into the manhole and leak to the ground along the manhole cover, posing risks of explosion, fire or harmful gas poisoning. Currently, the monitoring of urban gas leakage mostly relies on regular manual inspections, or the use of mobile monitoring vehicles for detection, as well as other gas sensors distributed on the ground. There are monitoring blind spots and poor timeliness.

[0003] Since the existing technology mainly focuses on the monitoring of open areas or directly accessible pipeline systems, it is unable to effectively monitor gas leakage in adjacent underground enclosed spaces. This may result in gas leakage remaining undetected for a long time, increasing the risks of safety hazards and environmental pollution. To address these drawbacks, the purpose of the present invention is to design a gas leakage monitor that can be directly installed on the manhole cover, capable of realizing real-time and accurate monitoring of gas leakage under the manhole cover, and giving an alarm in a timely manner, without affecting the entry and exit of construction workers in the manhole; therefore, a gas leakage monitor installed on a manhole is proposed for the above problems. Content of the Utility Model

[0004] To make up for the deficiencies of the existing technology, since the existing technology mainly focuses on the monitoring of open areas or directly accessible pipeline systems, it is unable to effectively monitor gas leakage in adjacent underground enclosed spaces. This may result in gas leakage remaining undetected for a long time, increasing the risks of safety hazards and environmental pollution. The utility model proposes a gas leakage monitor installed on a manhole.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a gas leakage monitor installed on a manhole, including a housing, a laser sensor, an antenna and a float switch; the lower end of the housing is fixedly connected to the laser sensor and the float switch respectively, the lower end of the housing is provided with an antenna, the upper end of the housing is fixedly connected to a cover through an external bolt, and a battery and a circuit board are installed inside the housing.

[0006] Preferably, the circuit board is provided with mounting holes, and the mounting holes of the circuit board are fixedly connected to the cover through internal bolts.

[0007] Preferably, the cover is provided with a plurality of annularly distributed [holes], the [holes] are located inside the [cover], the [cover] is fixedly connected to the housing through an external bolt, and the [holes] of the cover are matched with the mounting holes of the circuit board.

[0008] Preferably, the outer shell is provided with a bolt hole and a plurality of sealing grooves distributed in a ring shape. The bolt hole is matched with the cover, and a sealing ring is arranged inside the sealing groove.

[0009] Preferably, the bottom of the battery is fixedly connected to the outer shell through a base. The number of the batteries is three. The three batteries are fixedly connected to the base through a fixing sleeve, and the fixing sleeve and the base are fixedly connected through a fixing bolt.

[0010] Preferably, a collar is fixedly connected to the lower end of the antenna, and the collar is fixedly connected to the outer shell through a bracket.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. Through the structural design of the laser sensor, circuit board, float switch and antenna of the present utility model, when a gas pipeline or valve leaks, the gas will diffuse along the adjacent underground space and gather at the manhole. Since the gas is lighter, it will diffuse upward along the manhole. At this time, the device installed on the manhole cover detects through the laser sensor, analyzes the data through the circuit board and the float switch, and wirelessly transmits the current gas concentration to the background over a long distance. If the gas concentration increases to the set threshold, an alarm signal is sent through the circuit board and the position information is uploaded. If it does not exceed the threshold, continuous on-line monitoring is carried out through the laser sensor and the data is uploaded, so as to realize real-time and accurate monitoring of the gas leakage under the manhole cover and give an alarm in time, and it does not affect the entry and exit of the construction personnel in the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of a gas leakage monitor installed on a manhole cover of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of a gas leakage monitor installed on a manhole cover of the present utility model;

[0016] Figure 3 It is an exploded split structural diagram of a gas leakage monitor installed on a manhole cover of the present utility model;

[0017] Figure 4 It is a schematic structural diagram inside the outer shell of the present utility model;

[0018] Figure 5 This is the principle flow chart of the present utility model.

[0019] In the figure: 1. Outer bolt; 2. Inner bolt; 3. Sealing cover; 301. Outer mounting hole; 302. Inner mounting hole; 4. Outer shell; 41. Bolt hole; 42. Sealing groove; 5. Laser sensor; 6. Bracket; 7. Antenna; 8. Collar; 9. Float switch; 10. Sealing ring; 11. Circuit board; 111. Mounting hole; 12. Base; 13. Battery; 14. Fixed sleeve; 15. Fixed bolt. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] The following will further elaborate on this application in conjunction with the attached Figure 1 - Figure 4 to make a more detailed description of this application.

[0022] The embodiment of this application discloses a gas leakage monitor installed on a manhole cover. Refer to Figure 1 and Figure 2 , a gas leakage monitor installed on a manhole cover, comprising an outer shell 4, a laser sensor 5, an antenna 7 and a float switch 9; the lower end of the outer shell 4 is fixedly connected to the laser sensor 5 and the float switch 9 respectively, the antenna 7 is installed at the lower end of the outer shell 4, the upper end of the outer shell 4 is fixedly connected to a sealing cover 3 through an outer bolt 1, and a battery 13 and a circuit board 11 are installed inside the outer shell 4. This device can be directly installed on the manhole cover to form an integral whole with the manhole cover; after the manhole cover is closed, the device is perpendicular to the ground plane downward, and the laser sensor is at the bottom of the device's hardware compartment. When gas leakage occurs, since gas is lighter than air and continuously diffuses upward, the laser sensor 5 at the bottom of the device is the first to come into contact with the leaked gas for gas concentration detection, which does not affect the normal passage and construction of the construction personnel who need to enter and exit the well. Due to the characteristic that methane is lighter than air, once leakage occurs, the gas diffuses upward, and the gas leakage can be detected more quickly through the laser sensor 5.

[0023] Refer to Figure 3 , the circuit board 11 is provided with a mounting hole 111, the mounting hole 111 of the circuit board 11 is fixedly connected to the sealing cover 3 through an inner bolt 2, the float switch 9, the antenna 7 and the laser sensor 5 are all electrically connected to the circuit board 11, and the float switch 9 and the laser sensor 5 are used to monitor the gas concentration under the manhole cover in real time and can give a remote alarm;

[0024] Reference Figure 1 and Figure 3 , the cover 3 is provided with a plurality of annularly distributed 31 and 32, the 32 is located inside the 31, the 31 of the cover 3 is fixedly connected to the housing 4 through an external bolt 1, and the 32 of the cover 3 is matched with the mounting hole 111 of the circuit board 11;

[0025] Reference Figure 1 , Figure 3 and Figure 4 , the housing 4 is provided with a bolt hole 41 and a plurality of annularly distributed sealing grooves 42, the bolt hole 41 is matched with the 31 of the cover 3, and a sealing ring 10 is arranged inside the sealing groove 42;

[0026] Reference Figure 1 and Figure 4 , the bottom of the battery 13 is fixedly connected to the housing 4 through a base 12, the number of the batteries 13 is three, the three batteries 13 are fixedly connected to the base 12 through a fixing sleeve 14, and the fixing sleeve 14 and the base 12 are fixedly connected through a fixing bolt 15. With a low-power circuit design, the service life is longer under the condition of the same battery capacity;

[0027] Reference Figure 1 , Figure 2 and Figure 4 , a collar 8 is fixedly connected to the lower end of the antenna 7, the collar 8 is fixedly connected to the housing 4 through a bracket 6, and the antenna 7 can be used for signal reception and transmission;

[0028] Working principle: When there is a leakage in a gas pipeline or valve, the gas will diffuse along the adjacent underground space and gather at the inspection well. Since the gas is lighter, it will diffuse upward along the inspection well. At this time, the device installed on the manhole cover detects through the laser sensor 5, analyzes the data through the circuit board 11 and the float switch 9, and wirelessly transmits the current gas concentration to the background over a long distance. If the gas concentration increases to the set threshold, an alarm signal is sent through the circuit board and the position information is uploaded. If it does not exceed the threshold, continue to monitor online through the laser sensor 5 and upload the data.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A gas leak monitor installed on a manhole, characterized in that: The invention comprises a housing (4), a laser sensor (5), an antenna (7) and a float switch (9); the lower end of the housing (4) is fixedly connected to the laser sensor (5) and the float switch (9), respectively; the lower end of the housing (4) is provided with an antenna (7); the upper end of the housing (4) is fixedly connected to a cover (3) via an external bolt (1); and a battery (13) and a circuit board (11) are provided inside the housing (4); The cover (3) is provided with a plurality of annularly distributed (31) and (32), wherein the (32) is located on the inner side of the (31), and the (31) of the cover (3) is fixedly connected to the housing (4) via an external bolt (1), and the (32) of the cover (3) matches the mounting hole (111) of the circuit board (11).

2. A gas leak monitor installed on a manhole according to claim 1, characterized in that: The circuit board (11) is provided with a mounting hole (111), and the mounting hole (111) of the circuit board (11) is fixedly connected to the cover (3) via an inner bolt (2).

3. The gas leak monitor installed on a manhole according to claim 1, characterized in that: The housing (4) is provided with a bolt hole (41) and a plurality of annularly distributed sealing grooves (42); the bolt hole (41) matches the (31) of the sealing cover (3); and a sealing ring (10) is provided inside the sealing groove (42).

4. A gas leak monitor installed on a manhole according to claim 1, characterized in that: The bottom of the battery (13) is fixedly connected to the housing (4) via a base (12); the number of the batteries (13) is three; the three batteries (13) are fixedly connected to the base (12) via a fixing sleeve (14); the fixing sleeve (14) and the base (12) are fixedly connected via a fixing bolt (15).

5. A gas leak monitor installed on a manhole according to claim 1 or 4, characterized in that: The lower end of the antenna (7) is fixedly connected to a collar (8), and the collar (8) is fixedly connected to the housing (4) via a bracket (6).

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