Combustible gas detector for valve pit

Abstract

An upper cover is sleeved at the upper end of a shell, the inner wall of the upper cover is in threaded connection with the outer wall of the shell, a lithium battery and a controller are fixed at the upper part of the shell, an antenna is fixed at the bottom end of the shell, the antenna is in communication connection with the controller, and the shell comprises a front shell and a rear shell which are integrally formed front and back. The lower end of the front shell is lower than the lower end of the rear shell, the water level detection sensor is fixed to the lower end of the front shell in a threaded connection mode, the laser methane sensor is fixed to the lower end of the rear shell in a threaded connection mode, and cylindrical air columns are arranged at the lower ends of the water level detection sensor and the laser methane sensor. The water level detection sensor and the laser methane sensor are powered by a lithium battery; the upper cover, the gas sensor and the water level sensor are all in sealed connection with the shell through threads, the air column is arranged on the lower portion of the gas sensor and the lower portion of the water level sensor to play a role in isolation, sewage cannot make contact with the sensor body, and the product is good in waterproof and anti-pollution performance.

Description

Technical Field

[0001] This utility model relates to the field of gas detector technology, and in particular to a combustible gas detector for valve wells. Background Technology

[0002] Monitoring combustible gases in urban gas valve wells and enclosed spaces is difficult, and aging facilities pose many hidden dangers. Once a leak occurs, it will cause a large-scale disaster. Therefore, the stability requirements for gas detectors are very high. A gas detector powered by a lithium battery and supporting wireless communication is needed to improve the lifespan, protection, explosion-proof, pollution prevention, and communication reliability of the gas detector. Summary of the Invention

[0003] The purpose of this invention is to provide a combustible gas detector for valve wells, in which an air column is provided below the gas sensor and water level sensor to act as an isolation element, thereby enhancing waterproof and pollution-proof performance.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A combustible gas detector for valve wells includes a top cover, a lithium battery, a housing, a controller, a water level sensor, a laser methane sensor, and an antenna. The top cover is fitted onto the upper end of the housing, and the inner wall of the top cover and the outer wall of the housing are connected by threads. The lithium battery and the controller are fixed to the upper part of the housing, and the antenna is fixed to the bottom end of the housing. The antenna is communicatively connected to the controller. The housing includes a front housing and a rear housing integrally formed, with the lower end of the front housing lower than the lower end of the rear housing. The water level sensor is fixed to the lower end of the front housing by a threaded connection, and the laser methane sensor is fixed to the lower end of the rear housing by a threaded connection. Both the water level sensor and the laser methane sensor have a cylindrical air column at their lower ends. The water level sensor and the laser methane sensor are powered by the lithium battery, and both are communicatively connected to the controller.

[0006] Furthermore, the water level detection sensor includes a mounting block and a water level probe, the mounting block and the water level probe are fixedly connected vertically, the upper end of the mounting block and the lower end of the front housing are connected by threads, and the lower end of the water level probe is provided with a cylindrical air column.

[0007] Furthermore, a water level sensor sealing ring is fitted onto the lower end of the mounting block, and the front housing and the mounting block are sealed together by the water level sensor sealing ring.

[0008] Furthermore, the laser methane sensor includes a laser gas probe and a waterproof cylinder, which are fixedly connected vertically. The upper end of the laser gas probe and the lower end of the rear housing are connected by threads, and the lower end of the waterproof cylinder is provided with a cylindrical air column.

[0009] Furthermore, a gas probe sealing ring is fitted onto the upper end of the laser gas probe, and the rear housing and the laser gas probe are sealed together by the gas probe sealing ring.

[0010] Furthermore, the inner wall of the upper end of the waterproof cylinder and the outer wall of the lower end of the laser gas probe are connected by threads, and the waterproof cylinder and the laser gas probe are sealed by a waterproof cylinder sealing ring.

[0011] Furthermore, a manhole cover displacement switch is provided at the lower end of the rear housing, and the upper end of the manhole cover displacement switch and the lower end of the rear housing are connected by threads.

[0012] This invention integrates a gas sensor and a water level sensor in the outer shell. The top cover, gas sensor, and water level sensor are all connected to the outer shell in a sealed manner by threads. An air column at the bottom of the gas sensor and water level sensor serves as an isolation function, preventing sewage from contacting the sensor body. The product has good waterproof and pollution-proof performance. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the present invention;

[0014] Figure 2 This is a blasting diagram of the present invention;

[0015] Figure 3 This is a structural diagram of the antenna of this utility model;

[0016] Figure 4 This is a side view of the present invention.

[0017] Figure 5 This is a structural diagram of the water level detection sensor of this utility model;

[0018] Figure 6 This is a structural diagram of the laser methane sensor of this utility model;

[0019] Figure 7 This is a structural diagram of the manhole cover displacement switch of this utility model.

[0020] Figure label:

[0021] 1. Top cover; 2. Top sealing ring; 3. Top O-ring; 4. Lithium battery; 5. Support plate.

[0022] 6. Housing, 7. Pan head screws, 8. Fixing components, 9. Control board, 10. Film, 11. Light guide column;

[0023] 12. Manhole cover displacement switch; 13. Water level detection sensor; 14. Laser methane sensor; 15. Antenna.

[0024] 61 Front housing, 62 Rear housing;

[0025] 121 Switch mounting section, 122 Waterproof switch connector, 123 Displacement switch body;

[0026] 131 Mounting block, 132 Water level probe, 133 Water level sensor sealing ring;

[0027] 141 Laser gas probe, 142 Waterproof cylinder, 143 Gas probe sealing ring, 144 Waterproof cylinder sealing ring;

[0028] 151 Installation part, 152 Waterproof connector, 153 Antenna body. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] This utility model discloses a combustible gas detector for valve wells, such as Figure 1 and Figure 2 As shown, it includes a top cover 1, a lithium battery 4, a housing 6, a controller 9, a water level detection sensor 13, a laser methane sensor 14, and an antenna 15.

[0031] like Figure 2 As shown, the upper cover 1 is fitted onto the upper end of the housing 6. The housing 6 has an IP68 protection rating. The inner wall of the upper cover 1 and the outer wall of the upper end of the housing 6 are connected by threads. The number of threads on the outer wall of the upper end of the housing 6 is ≥8. The inner wall of the upper cover 1 and the outer wall of the housing 6 are sealed by a top sealing ring 2 and a top O-ring 3.

[0032] like Figure 3 As shown, the antenna 15 is fixed to the bottom of the housing 6 and is connected to the controller 9. The antenna 15 includes an upper mounting part 151, a lower antenna waterproof connector 152, and a centrally penetrating antenna body 153. The mounting part 151 is connected to the bottom of the housing 6 by a thread. The number of threads on the outer wall of the mounting part 151 is ≥8. The lower end of the mounting part 151 is integrally formed and extends downward to provide the antenna waterproof connector 152. The antenna waterproof connector 152 adopts an IP68 waterproof aviation plug to provide waterproof protection for the antenna body 153.

[0033] like Figure 4As shown, the housing 6 includes a front housing 61 and a rear housing 62 integrally formed, with the lower end of the front housing 61 being lower than the lower end of the rear housing 62.

[0034] The lithium battery 4 and the controller 9 are fixed to the upper part of the housing 6. The controller 9 is powered by the lithium battery 4. Figure 1 As shown, the housing 6 has an annular support plate 5 inside. The support plate 5 is fixed to the inner wall of the housing 6 by means of a pin and a slot. The inner diameter of the support plate 5 is smaller than the outer diameter of the lithium battery 4 to support the lithium battery 4.

[0035] The control board 9 is fixedly installed on the inner wall of the front side of the front housing 61 by the fastener 8. The fastener 8 is fixedly connected to the bottom surface of the rear housing 62 by the pan head screw 7. The front end of the control board 9 is provided with a signal indicator panel. The front end of the front housing 61 is provided with a film 10 and a light guide column 11 corresponding to the signal indicator panel.

[0036] like Figure 4 As shown, the water level sensor 13 is fixed to the lower end of the front housing 61, and the laser methane sensor 14 is fixed to the lower end of the rear housing 62. The water level sensor 13 and the laser methane sensor 14 are powered by the lithium battery 4. Both the water level sensor 13 and the laser methane sensor 14 are connected to the controller 9. Because the lower end of the front housing 61 is lower than the lower end of the rear housing 62, only the water level sensor 13 is in contact with the water surface during use, while the laser methane sensor 14 is raised to prevent water from entering the water.

[0037] like Figure 5 As shown, the water level detection sensor 13 includes a mounting block 131 and a water level probe 132. The mounting block 131 and the water level probe 132 are fixedly connected in sequence. The upper end of the mounting block 131 and the lower end of the front housing 61 are connected by threads. The number of threads on the outer wall of the lower end of the mounting block 131 is ≥8.

[0038] The lower end of the mounting block 131 is fitted with a water level sensor sealing ring 133, and the front housing 61 and the mounting block 131 are sealed by the water level sensor sealing ring 133.

[0039] like Figure 6 As shown, the laser methane sensor 14 includes a laser gas probe 141 and a waterproof cylinder 142. The laser gas probe 141 and the waterproof cylinder 142 are fixedly connected in sequence, and the upper end of the laser gas probe 141 and the lower end of the rear housing 62 are connected by threads.

[0040] The laser gas probe 141 emits a laser of a specific wavelength. As the injected periodic current modulates the light, the wavelength changes periodically. By scanning the wavelength, the center wavelength of the laser output is made to be the absorption spectral line of the gas to be measured. The concentration of the gas to be measured is inverted by using the spectral intensity signal obtained after gas absorption.

[0041] The upper end of the laser gas probe 141 is fitted with a gas probe sealing ring 143. The rear housing 62 and the laser gas probe 141 are sealed by the gas probe sealing ring 143. The inner wall of the upper end of the waterproof cylinder 142 and the outer wall of the lower end of the laser gas probe 141 are connected by threads. The number of threads on the outer wall of the lower end of the laser gas probe 141 is ≥8. The waterproof cylinder 142 and the laser gas probe 141 are sealed by a waterproof cylinder sealing ring 144.

[0042] like Figure 7 As shown, a manhole cover displacement switch 12 is provided at the lower end of the rear housing 62. The manhole cover displacement switch 12 includes an upper switch mounting part 121, a lower switch waterproof connector 122, and a displacement switch body 123 that runs through the center. The lower outer wall of the switch mounting part 121 and the lower end of the rear housing 62 are connected by threads. The number of threads on the lower outer wall of the switch mounting part 121 is ≥8. The lower end of the switch mounting part 121 is integrally formed and extends downward to provide a switch waterproof connector 122. The switch waterproof connector 122 adopts an IP68 waterproof aviation plug to provide waterproof protection for the displacement switch body 123.

[0043] In this combustible gas detector, all threaded connections are made using a combination of threaded connection and potting, with a potting thickness of >15mm.

[0044] When in use, this utility model is equivalent to a sealed container, allowing the water level probe 132 and the laser gas probe 141 to be installed vertically. The water level submerges the water level probe 132, naturally forming a sealed cavity. The lower ends of both the water level probe 132 and the waterproof cylinder 142 have a section of air column that acts as an isolation, preventing sewage from contacting the sensor body.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A combustible gas detector for valve wells, characterized in that, The device includes a top cover (1), a lithium battery (4), a housing (6), a controller (9), a water level sensor (13), a laser methane sensor (14), and an antenna (15). The top cover (1) is fitted onto the upper end of the housing (6). The inner wall of the top cover (1) and the outer wall of the housing (6) are connected by threads. The lithium battery (4) and the controller (9) are fixed to the upper part of the housing (6). The antenna (15) is fixed to the bottom end of the housing (6) and is communicatively connected to the controller (9). The housing (6) includes a front housing (61) and a rear housing (62) integrally formed. The lower end of the front housing (61) is lower than the lower end of the rear housing (62). The water level detection sensor (13) is fixed to the lower end of the front housing (61) by a threaded connection. The laser methane sensor (14) is fixed to the lower end of the rear housing (62) by a threaded connection. The lower ends of the water level detection sensor (13) and the laser methane sensor (14) are provided with cylindrical air columns. The water level detection sensor (13) and the laser methane sensor (14) are powered by the lithium battery (4). The water level detection sensor (13) and the laser methane sensor (14) are both connected to the controller (9) for communication.

2. The combustible gas detector for valve wells according to claim 1, characterized in that, The water level detection sensor (13) includes a mounting block (131) and a water level probe (132). The mounting block (131) and the water level probe (132) are fixedly connected vertically. The upper end of the mounting block (131) and the lower end of the front housing (61) are connected by threads. The lower end of the water level probe (132) is provided with a cylindrical air column.

3. The combustible gas detector for valve wells according to claim 2, characterized in that, The lower end of the mounting block (131) is fitted with a water level sensor sealing ring (133), and the front housing (61) and the mounting block (131) are sealed by the water level sensor sealing ring (133).

4. The combustible gas detector for valve wells according to claim 1, characterized in that, The laser methane sensor (14) includes a laser gas probe (141) and a waterproof tube (142). The laser gas probe (141) and the waterproof tube (142) are fixedly connected in sequence. The upper end of the laser gas probe (141) and the lower end of the rear housing (62) are connected by threads. The lower end of the waterproof tube (142) is provided with a cylindrical air column.

5. The valve well combustible gas detector according to claim 4, characterized in that, The upper end of the laser gas probe (141) is fitted with a gas probe sealing ring (143), and the rear housing (62) and the laser gas probe (141) are sealed by the gas probe sealing ring (143).

6. The combustible gas detector for valve wells according to claim 5, characterized in that, The inner wall of the upper end of the waterproof cylinder (142) and the outer wall of the lower end of the laser gas probe (141) are connected by threads, and the waterproof cylinder (142) and the laser gas probe (141) are sealed by a waterproof cylinder sealing ring (144).

7. The combustible gas detector for valve wells according to claim 1, characterized in that, The lower end of the rear housing (62) is provided with a manhole cover displacement switch (12), and the upper end of the manhole cover displacement switch (12) and the lower end of the rear housing (62) are connected by threads.

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