CN201355352Y

CN201355352Y - Methane sensor with air chamber micro vent hole for coal mine

Info

Publication number: CN201355352Y
Application number: CNU2008201572050U
Authority: CN
Inventors: 李志星; 徐晓艳; 厉仁勇
Original assignee: Shanghai Kunjia Automation Technology Co Ltd
Current assignee: Shanghai Kunjia Automation Technology Co Ltd
Priority date: 2008-12-16
Filing date: 2008-12-16
Publication date: 2009-12-02
Anticipated expiration: 2018-12-16

Abstract

The utility model discloses a methane sensor with air chamber vent hole for a coal mine, belonging to the field of safe appliance applied to the coal mine. The utility model is characterized in that based on the prior methane sensor structure for a coal mine, an air chamber is provided with an about 2mm vent hole, so that the heat generated by combusting heating element is sent out from the vent hole, thus improving the responding time of the element and measuring the concentration of the methane in air exactly. The utility model has the advantages of simple structure, exact measurement and high safe performance, thus reducing the incidence rate of potential safety hazard and ensuring the life safety of down-hole operation staff.

Description

Methane sensor for coal mine with the little air-guiding hole of air chamber

Technical field:

The utility model relates to the sensor construction that is used to survey methane concentration in the industry such as a kind of colliery, is specially the methane sensor for coal mine with the little air-guiding hole of air chamber of discharging hot gas.

Background technology:

In commercial production, particularly coal, petrochemical industry, flammable explosive gas are the main threats of safety in production, and in recent years, the mine safety explosion accident frequently takes place, and causes tremendous loss; Simultaneously, inflammable gas also can pollute environment after discharging, and as natural-gas such as methane, belongs to colorless and odorless gas; Therefore; have only by sensitive reliable detection instrument and detect; survey the concentration of methane in the existing market in the air chamber internal combustion by heater element by methane transducer; and then avoid the generation of disaster; and heater element can cause in the air chamber temperature higher when methane transducer air chamber internal combustion, and regular meeting causes the heater element response time long, can not in time react; and then influence the detection quality of methane transducer, even cause the sensor cisco unity malfunction.

The utility model content:

In order to solve deficiency of the prior art, the utility model provides a kind of methane sensor for coal mine with the little air-guiding hole of air chamber.

The utility model is to realize by following technical scheme:

Methane sensor for coal mine with the little air-guiding hole of air chamber, its structure mainly comprises: handle, stainless steel casing, the aviation socket, mainboard, alarm lamp, display window, air chamber, bonnet, O-ring seal, the aviation socket, single-chip microcomputer etc., mainboard is provided with the LED display circuit, the LED display circuit, microcontroller system circuit, the current signal output circuit, power supply decoupling filtering circuit, power supply stabilization circuit, the power-off signal output circuit, the dense electric bridge testing circuit of height, the frequency signal output circuit, sound alarm circuit, the data storing circuit, the cmos circuit input end grounding of usefulness not, shaking control receives and the function button circuit, handle is welded on the upper end of stainless steel casing, the aviation socket is welded on the side of shell, mainboard is fixed on the medial surface of shell by ten pan head screws, alarm lamp is fixed on the both sides, lower end of shell with nut, air chamber is welded on the middle part of shell lower end, display window is fixed on pressing plate with nut, between luffer boards and the shell, display window is provided with O-ring seal with the place, slit that contacts of shell, and the back upside of air chamber has a wind hole about 2mm.

Described air chamber is having a wind hole about 2mm on the air chamber, utilize element self flameless burning to produce heating power air is risen from the discharge of wind hole, can in time improve the element responds time and more accurately measure airborne methane concentration.

Because adopted above technical scheme, the utility model work efficiency is higher, it is shorter to detect the airborne methane concentration time, detects more accurately.

Description of drawings:

Fig. 1 is the structural representation of methane sensor for coal mine;

Fig. 2 is the outboard profile of Fig. 1;

Fig. 3 is the structural representation of the little air-guiding hole of methane sensor for coal mine air chamber.

Among the figure: 1 shell, 2 bonnets, 3 handles, 4 nameplates, 5, alarm lamp, 6 socket head cap screws, 7 O-ring seal a, 80 pan head screw a, 90 pan head screw b, 10 O-ring seal b, 11 air chambers, 12 beams, 13 screws, 14 aviation plugs, 15 mainboards, 16 little air-guiding holes.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further specified:

With reference to accompanying drawing 1, accompanying drawing 2, methane sensor for coal mine with the little air-guiding hole of air chamber, its structure comprises: handle (3), shell (1), aviation socket (14), mainboard (15), alarm lamp (5), display window, air chamber (11), bonnet (2), O-ring seal etc., mainboard is provided with the LED display circuit, the LED display circuit, microcontroller system circuit, the current signal output circuit, power supply decoupling filtering circuit, power supply stabilization circuit, the power-off signal output circuit, the dense electric bridge testing circuit of height, the frequency signal output circuit, sound alarm circuit, the data storing circuit, the cmos circuit input end grounding of usefulness not, shaking control receives and the function button circuit, handle (3) is welded on the upper end of stainless steel casing (1), aviation socket (14) is welded on the side of shell (1), mainboard (15) is by ten pan head screw a (8), ten pan head screw b (9) are fixed on the medial surface of shell (1), alarm lamp (5) is fixed on the both sides, lower end of shell, air chamber (11) is welded on the middle part of shell (1) lower end, display window is gone up with screw (13) is fixing inside the shell, display window is provided with O-ring seal a (7) with the place, slit that contacts of shell (1), bonnet (2) is fixedlyed connected with shell (1) by socket head cap screw (6), at the little air-guiding hole (16) that has on the air chamber (11) about a 2mm.

With reference to accompanying drawing 3, during the methane transducer operate as normal, element self flameless burning produces heating power rises from little air-guiding hole (16) discharge air, can in time improve the element responds time and more accurately measure airborne methane concentration.

It should be noted that at last: above only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.

Claims

1, the methane sensor for coal mine that has the little air-guiding hole of air chamber, its structure mainly comprises: handle (3), shell (1), aviation socket (14), mainboard (15), alarm lamp (5), display window, air chamber (11), bonnet (2) and O-ring seal, air chamber (11) is welded on the middle part of shell (1) lower end, it is characterized in that: at the little air-guiding hole (16) that has on the air chamber (11) about a 2mm.