CN208109788U - Small-sized toxic and harmful gas monitor - Google Patents

Abstract

The utility model provides small-sized toxic and harmful gas monitor, including detector main body, stirs pin and spacing head, is provided with display in the middle part of the detector main body front side wall, and the detector main body below display is provided with operation panel；The detector body interior is provided with single-chip microcontroller and AD conversion, and by being electrically connected between single-chip microcontroller and AD conversion.The utility model passes through the comprehensive novel device realized from the fixed toxic and harmful gas detector of Reusability screw and its fixed frame of above-mentioned various structures mutual cooperations, the gas detecting instrument can using in complicated power house environment, itself it can collect dust-proof, anti-tamper, feature convenient for safeguarding is, and when detecting toxic and harmful gas, it can be by opening rotary electric machine, reinforce the concentration difference of the further specific measurement pernicious gas of absorption to toxic and harmful gas, in order to which emergency worker uses when meeting an urgent need as important reference data.

Description

Small-sized toxic and harmful gas monitor

Technical field

The utility model belongs to chemical industry measurement equipment technical field, and more specifically, in particular to small-sized is poisonous and harmful Gas monitoring instrument.

Background technique

Gas detecting instrument is a kind of instrument and meter tool of gas leakage Concentration Testing, including：Portable gas physical examination Survey instrument, hand-held gas detecting instrument, stationary gas detector, online gas detecting instrument etc..Mainly utilize gas sensor Gaseous species present in environment are detected, gas sensor is the sensor of the composition and content for detection gas, such as specially In sharp application CN201620388835.3 it is a kind of environmental protection small-sized toxic and harmful gas monitor, including shell, detection probe, Hygrosensor, display screen, the shell top are provided with top cover, and the shell side is provided with fixed screw, the shell Rear side is provided with data connector, is provided with the hygrosensor on rear side of the shell, the shell side is equipped with the inspection Probing needle, the shell rear side are equipped with supply hub, and described shell one end is equipped with end cap, is equipped on the end cap described Display screen is provided with signal lamp on the end cap, operation button is provided on the end cap, is provided with electricity on the end cap Source switch.Beneficial effect is：The utility model compact, is convenient for carrying, and is not necessarily to equipment inner blower, can be directly right Outside air is detected, and detection efficiency and accuracy are improved.

Based on above-mentioned, the utility model people discovery, the toxic and harmful gas detector in existing and above-mentioned patent exists There are the following problems mostly when use：

1. the detecting element inside detector is needed to be replaced frequently to guarantee it for the detection device of real-time detection Detection sensitivity, therefore it is bolted to the mode on wall and not convenient；

2. toxic and harmful gas, when detecting limit value, general is mostly the concentration of nature sucking, lack the inspection of maximum concentration It surveys, because pernicious gas may be gathered according to topography, this is likely to result in fatal harm for emergency worker.

A kind of for another example hand-held gas detection in application for patent CN201620187614.X, including gas detecting instrument Device, the gas detecting instrument upper end are equipped with lamp holder and the alarm of lamp holder upper end, the gas detecting instrument two are arranged in Side be all provided with it is fluted, the groove be equipped with friction rib, the gas detecting instrument side be equipped with air inlet, the gas detecting instrument The device other side is equipped with suction ventilator, loudspeaker and USB interface, is equipped with working power, the work in the gas detecting instrument lower end Make power supply side equipped with charging jack, the gas detecting instrument shell is equipped with display screen, control switch and electricity display screen.This Utility model passes through the suction ventilator of gas detecting instrument side, in order to which extraneous gas is drawn into detecting instrument, due to Electricity display screen on gas detecting instrument shell, can show the service condition of working power, instrument is avoided to power off, influence work Make personnel's use.

Although assisting air draught using suction ventilator in above-mentioned patent, opening suction ventilator for a long time will cause energy waste, And air is sucked for a long time, there is very big probability to form dust in inside and gather, influences to detect.

Then, in view of this, being studied improvement for existing structure and missing, small-sized toxic and harmful gas is provided Monitor, to achieve the purpose that with more more practical value.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides small-sized toxic and harmful gas monitor, existing to solve For having the detection device as real-time detection, the detecting element inside detector is needed to be replaced frequently to guarantee that its detection is sensitive Degree, therefore it is bolted to the mode on wall and not convenient, lack the detection of maximum concentration, because pernicious gas may It can be gathered according to topography, this is likely to result in fatal harm for emergency worker, and opening suction ventilator for a long time can make At energy waste, and air is sucked for a long time, have very big probability to form the problem of dust gathers, influences detection in inside.

The purpose and effect of the small-sized toxic and harmful gas monitor of the utility model, are reached by technological means in detail below At：

Small-sized toxic and harmful gas monitor, including detector main body, display, alarm, warning lamp, camera, Gas sensor, flowline, dust cover, air-breathing air duct, rotary electric machine, exhaust pipe install backboard, and fixation hole fixes inserted block, Exhaust head, detent block, gripping mechanism, operation panel, external memory, single-chip microcontroller, AD conversion acquire bend pipe, acquire chimney filter, interior Pipe, support column, air-breathing paddle, side guard plate, H-type plate, groove, L-type slot, exhaust outlet, limiting slot, spring stir pin and limit Head, the detector main body front side wall middle part is provided with display, and the detector main body below display is provided with operating surface Plate；The front side wall top of detector main body is arranged in the alarm；The detector body top plane both ends fixation is set Be equipped with warning lamp, and warning lamp with alarm by being electrically connected；Two reports of the detector body top plane Camera is fixedly installed between alert device；The detector body interior is provided with single-chip microcontroller and AD conversion, and single-chip microcontroller and AD By being electrically connected between conversion；External memory is built-in in the lower end plane of detector main body back；The detection The left end and right end sidewalls bottom of instrument main body are fixedly installed gas sensor, and the acquisition of gas sensor and top setting Bend pipe is connected；It is fixedly connected with flowline in the right end top port of the acquisition bend pipe on right side, and right side is described It acquires and is fixedly connected with air-breathing air duct at the top of the top port of bend pipe left end, and the structure of the acquisition bend pipe in left side and the above-mentioned right side The acquisition bend pipe position of side is opposite；Rotary electric machine, and rotary electric machine bottom and air-breathing are provided at the top of the air-breathing air duct The periphery that air duct is connected is set up there are six exhaust pipe, and exhaust pipe top is connected to the exhaust head at the top of rotary electric machine Bottom；There are four symmetrical fixed inserted blocks for setting on the back side wall of the detector main body, and install backboard and pass through fixation Inserted block is connected as one with detector main body, and the groove of semicircle shape is offered at the top and bottom of fixed inserted block；Institute State circular fixation hole there are two symmetrically opening up in the middle part of installation backboard.

Further, the ring structure of the acquisition bend pipe generally semicircle shape, and acquire in bend pipe and be provided with a altogether adopt Collect chimney filter, and the contact terminal of gas sensor is built in acquisition chimney filter.

Further, six circular inner pipes of circular array, and flowline are offered in the flowline vertically Middle part is provided with support column, and top end is supported to be fixedly connected on the bottom of coniform dust cover, and the bottom of dust cover Portion's diameter is suitably larger than the diameter of flowline.

It further, is hollow cylindrical cavity structure inside the air-breathing air duct, and air-breathing air duct inner cavity top is rotary electric machine The air-breathing paddle of bottom, and above air-breathing paddle it is the entrance of exhaust pipe.

Further, the generally up-narrow and down-wide truncated cone structure of the exhaust head, and be provided on the inclined-plane of exhaust head Four exhaust outlets.

Further, the top left of the installation backboard and right end are provided with side guard plate, and side guard plate downward vertically Depth it is consistent with the fixed depth of inserted block.

Further, the left end of the front side wall of the installation backboard and right end are vertically installed with two groups of symmetrical L shapes Side guard plate, and the L-type slot being adapted with side guard board structure is also equipped on fixed inserted block.

Further, the H-type plate is arranged between two groups of side guard plates, enables H-type plate to be plugged on just solid Determine the inside of inserted block, and is fixedly installed gripping mechanism in the top planes of the H-type plate of lower section, and the back of detector main body Corresponding detent block is also equipped in plane.

Further, the gripping mechanism is internally provided with spring, and the top of spring is fixedly connected with towards detector Main body is the spacing head of scarf, and the right end of spacing head is vertically installed with and stirs pin, and opens up on the side wall of gripping mechanism Have for stirring the notch that pin moves up and down, and the bottom of detent block also offers the spacing head being adapted with spacing head.

Compared with prior art, the utility model has the advantages that：

The setting for acquiring bend pipe by the ring structure of acquisition bend pipe generally semicircle shape, and is acquired and is provided in bend pipe Acquisition chimney filter altogether, and the contact terminal of gas sensor is built in acquisition chimney filter, so that being inhaled from flowline The air entered can possess more stop chances in acquisition bend pipe, facilitate the accuracy of harmful gas concentration detection, and Six circular inner pipes of circular array are offered in flowline vertically, and are provided with support column in the middle part of flowline, and Support top end is fixedly connected on the bottom of coniform dust cover, and the base diameter of dust cover is suitably larger than flowline Diameter, so as to avoid external dust from entering in flowline, the double shield of circular inner pipe and dust cover can have The entrance for avoiding dust of effect.

The setting in air-breathing air duct and air-breathing paddle, by being hollow cylindrical cavity structure inside air-breathing air duct, and air-breathing air duct inner cavity Top is the air-breathing paddle of rotary electric machine bottom, and above air-breathing paddle is the entrance of exhaust pipe, so that in the inner cavity of air-breathing air duct Negative pressure state can be quickly formed, facilitates the concentration difference detection for sucking pernicious gas from below, is referred to convenient for emergency worker It uses.

The setting of camera, by being fixedly installed camera shooting between two alarms of detector body top plane Head works control camera, and the content that camera is recorded is stored in when single-chip microcontroller receives alarm signal External memory can be used as emergency reference data and use in case emergency worker uses.

The setting of backboard and gripping mechanism is installed, is set downward vertically by the top left and right end of installation backboard first It is equipped with side guard plate, and the depth of side guard plate is consistent with the fixed depth of inserted block, so that side guard plate can be to detector master The external memory at body back forms effective protection, avoids foreign from damaging external memory, the later period is facilitated to carry out Data acquisition, the left end and right end of installing the front side wall of backboard are vertically installed with the side guard plate of two groups of symmetrical L shapes, and fixed The L-type slot being adapted with side guard board structure is also equipped on inserted block, so that detector main body can pass through fixed inserted block It is plugged on installation backboard with side guard plate, facilitates installation and replacement and debugging, and H-type plate is arranged between two groups of side guard plates, Just enable H-type plate to be plugged on the inside of fixed inserted block, and be fixedly installed in the top planes of the H-type plate of lower section Gripping mechanism, and corresponding detent block is also equipped on the back flat of detector main body, so that detector master Body can more quickly and easily carry out detent when docking with installation backboard.

The utility model has by comprehensive realize of above-mentioned various structures mutual cooperations from Reusability screw is fixed The novel device of malicious harmful gas detector and its fixed frame, the gas detecting instrument can using in complicated power house environment, Itself it can integrate dust-proof, anti-tamper, feature convenient for safeguarding, and when detecting toxic and harmful gas, Neng Goutong Unlatching rotary electric machine is crossed, the concentration difference of the further specific measurement pernicious gas of absorption to toxic and harmful gas is reinforced, In order to which emergency worker uses when meeting an urgent need as important reference data.

Detailed description of the invention

Fig. 1 is the right front axis view structural schematic diagram of the utility model.

Fig. 2 is the left back square shaft view structural schematic diagram of the utility model.

Fig. 3 is the right back lower place axis view structural schematic diagram of the utility model.

Fig. 4 is the schematic view of the front view of the utility model.

Fig. 5 is schematic diagram of main cross-sectional structure of the utility model.

Fig. 6 is the flowline of the utility model and the half section structure diagram of air-breathing air passage portion.

Fig. 7 is the right side structural representation of the utility model.

Fig. 8 is axis view structural schematic diagram in the detector main body and installation backboard discrete state of the utility model.

Fig. 9 is the detector main body and installation backboard discrete state lower axle view structural schematic diagram of the utility model.

Figure 10 is the functional module structure schematic diagram of the utility model.

In figure, the corresponding relationship of component names and accompanying drawing number is：

1- detector main body, 2- display, 3- alarm, 4- warning lamp, 5- camera, 6- gas sensor, 7- air collecting pipe Road, 8- dust cover, 9- air-breathing air duct, 10- rotary electric machine, 11- exhaust pipe, 12- install backboard, and 13- fixation hole, 14- is fixed to be inserted Block, 15- exhaust head, 16- detent block, 17- gripping mechanism, 101- operation panel, 102- external memory, 103- single-chip microcontroller, 104-AD conversion, 601- acquire bend pipe, and 602- acquires chimney filter, 701- inner tube, 801- support column, 1001- air-breathing paddle, the side 1201- Backplate, 1202-H type plate, 1401- groove, 1402-L type slot, 1501- exhaust outlet, 1601- limiting slot, 1701- spring, 1702- stirs pin, 1703- spacing head.

Specific embodiment

The embodiments of the present invention is described in further detail with reference to the accompanying drawings and examples.Following embodiment For illustrating the utility model, but cannot be used to limit the scope of the utility model.

In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more；Term The orientation of the instructions such as "upper", "lower", "left", "right", "inner", "outside", " front end ", " rear end ", " head ", " tail portion " or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is construed as a limitation of the present invention.In addition, term " first ", " second ", " third " etc. are used for description purposes only, and cannot It is interpreted as indication or suggestion relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

Embodiment：

As shown in attached drawing 1 to attached drawing 10：

The utility model provides small-sized toxic and harmful gas monitor, including detector main body 1, display 2, alarm 3, warning lamp 4, camera 5, gas sensor 6, flowline 7, dust cover 8, air-breathing air duct 9, rotary electric machine 10, exhaust pipe 11, installation backboard 12, fixation hole 13, fixed inserted block 14, exhaust head 15, detent block 16, gripping mechanism 17, operation panel 101, outside Portion's memory 102, single-chip microcontroller 103, AD conversion 104 acquire bend pipe 601, acquire chimney filter 602, inner tube 701, and support column 801 is inhaled Gas paddle 1001, side guard plate 1201, H-type plate 1202, groove 1401, L-type slot 1402, exhaust outlet 1501, limiting slot 1601, bullet Spring 1701 stirs pin 1702 and spacing head 1703, is provided with display 2, and display in the middle part of 1 front side wall of detector main body The detector main body 1 of 2 lower sections is provided with operation panel 101；The front side wall top of detector main body 1 is arranged in the alarm 3； The 1 top planes both ends of detector main body are fixedly installed warning lamp 4, and warning lamp 4 with alarm 3 by being electrical connected It connects；Camera 5 is fixedly installed between two alarms 3 of 1 top planes of detector main body；The detector master Body 1 is internally provided with single-chip microcontroller 103 and AD conversion 104, and by being electrically connected between single-chip microcontroller 103 and AD conversion 104；Institute It states in 1 back lower end plane of detector main body and is built-in with external memory 102；The left end and right end side of the detector main body 1 Wall bottom is fixedly installed gas sensor 6, and gas sensor 6 is connected with the acquisition bend pipe 601 that top is arranged；Right side The acquisition bend pipe 601 right end top port on be fixedly connected with flowline 7, and the acquisition bend pipe 601 on right side It is fixedly connected with air-breathing air duct 9 at the top of left end top port, and the structure of the acquisition bend pipe 601 in left side and above-mentioned right side 601 positions of the acquisition bend pipe are opposite；Be provided with rotary electric machine 10 at the top of the air-breathing air duct 9, and 10 bottom of rotary electric machine with The periphery that air-breathing air duct 9 is connected is set up there are six exhaust pipe 11, and 11 top of exhaust pipe is connected to rotary electric machine 10 The bottom of the exhaust head 15 at top；There are four symmetrical fixed inserted blocks 14 for setting on the back side wall of the detector main body 1, and Installation backboard 12 passes through fixed inserted block 14 and is connected as one with detector main body 1, and 14 top and bottom of fixed inserted block Offer the groove 1401 of semicircle shape；Circular fixation hole 13 there are two symmetrically being opened up in the middle part of the installation backboard 12.

Wherein, the ring structure of the acquisition bend pipe 601 generally semicircle shape, and acquire and be provided with totally 21 in bend pipe 601 A acquisition chimney filter 602, and the contact terminal of gas sensor 6 is built in acquisition chimney filter 602, so that from flowline The air sucked in 7 can possess more stop chances in acquisition bend pipe 601, facilitate the accurate of harmful gas concentration detection Property.

Wherein, six circular inner pipes 701 of circular array, and flowline 7 are offered in the flowline 7 vertically Middle part is provided with support column 801, and 801 top of support column is fixedly connected on the bottom of coniform dust cover 8, and dust-proof The base diameter of cover 8 is suitably larger than the diameter of flowline 7, as shown in figure 4, so as to avoid external dust from entering gas production In pipeline 7, the double shield of circular inner pipe 701 and dust cover 8 can effectively avoid the entrance of dust.

It wherein, is hollow cylindrical cavity structure inside the air-breathing air duct 9, and 9 inner cavity top of air-breathing air duct is rotary electric machine 10 The air-breathing paddle 1001 of bottom, and above air-breathing paddle 1001 it is the entrance of exhaust pipe 11, so that can in 9 inner cavity of air-breathing air duct Negative pressure state is quickly formed, facilitates the concentration difference detection for sucking pernicious gas from below, refers to and use convenient for emergency worker.

Wherein, the generally up-narrow and down-wide truncated cone structure of the exhaust head 15, and be provided on the inclined-plane of exhaust head 15 Four exhaust outlets 1501 avoid detection gas from repeating to inhale so that exhaust outlet 1501 can either discharge detection gas obliquely Enter, influence detected value, and can be avoided dust and enter blocking exhaust pipe 11 from exhaust outlet 1501.

Wherein, the top left of the installation backboard 12 and right end are provided with side guard plate 1201 downward vertically, and side is protected The depth of plate 1201 is consistent with the fixed depth of inserted block 14, so that side guard plate 1201 can be to 1 back of detector main body External memory 102 formed effective protection, avoid foreign from damaging external memory 102, the later period facilitated to carry out Data acquisition.

Wherein, the left end of the front side wall of the installation backboard 12 and right end are vertically installed with the side of two groups of symmetrical L shapes Backplate 1201, and it is also equipped with the L-type slot 1402 being adapted with 1201 structure of side guard plate on fixed inserted block 14, so that inspection Surveying instrument main body 1 can be plugged on installation backboard 12 by fixed inserted block 14 and side guard plate 1201, facilitate installation and replacement and debugging.

Wherein, the H-type plate 1202 is arranged between two groups of side guard plates 1201, enables H-type plate 1202 just It is plugged on the inside of fixed inserted block 14, and is fixedly installed gripping mechanism 17 in the top planes of the H-type plate 1202 of lower section, and Corresponding detent block 16 is also equipped on the back flat of detector main body 1 so that detector main body 1 with peace Dress backboard 12 can more quickly and easily carry out detent when docking.

Wherein, the gripping mechanism 17 is internally provided with spring 1701, and the top of spring 1701 be fixedly connected with towards Detector main body 1 is the spacing head 1703 of scarf, and the right end of spacing head 1703 is vertically installed with and stirs pin 1702, and blocks Offered on the side wall of tight device 17 for stirring the notch that pin 1702 moves up and down, and the bottom of detent block 16 also offer with The adaptable spacing head 1703 of spacing head 1703 so that gripping mechanism 17 can smooth fixing freely, side Just the maintenance and maintenance of detector.

The specifically used mode and effect of the present embodiment：

In the utility model, external power supply and detector main body 1 are linked together first, and installation backboard 12 is led to It crosses fixation hole 13 to be fixed on the wall with fixing bolt, and will test the alignment installation backboard of fixation inserted block 14 at 1 back of instrument main body Side guard plate 1201 on 12 and the insertion of H-type plate 1202 make detent block 16 mutually nested with gripping mechanism 17 to connecting, Rotary electric machine 10 does not work detector main body 1 under normal circumstances, energy saving, when gas sensor 6 detects minimum When the concentration alarm of degree, rotary electric machine 10 will start to work, and will test the toxic and harmful gas near instrument main body 1 and quickly be received Collection, to determine concentration difference, for emergency worker's use, and camera 5 simultaneously can collection site picture be stored in it is outer In portion's memory 13, the foundation of later period cause of accident lookup can be used as.

The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustively or to incite somebody to action The utility model is limited to disclosed form.Many modifications and variations are aobvious and easy for the ordinary skill in the art See.Embodiment was chosen and described in order to better illustrate the principle and practical application of the utility model, and makes this field Those of ordinary skill it will be appreciated that the utility model to designing various embodiments suitable for specific applications with various modifications.

Claims (9)

1. small-sized toxic and harmful gas monitor, it is characterised in that：The small-sized toxic and harmful gas monitor includes detection Instrument main body, display, alarm, warning lamp, camera, gas sensor, flowline, dust cover, air-breathing air duct, rotation electricity Machine, exhaust pipe install backboard, fixation hole, fixed inserted block, exhaust head, detent block, gripping mechanism, operation panel, external storage Device, single-chip microcontroller, AD conversion acquire bend pipe, acquire chimney filter, inner tube, support column, air-breathing paddle, side guard plate, H-type plate, groove, L-type Slot, exhaust outlet, limiting slot, spring stir pin and spacing head, are provided with display in the middle part of the detector main body front side wall, And the detector main body below display is provided with operation panel；The alarm is arranged on the front side wall of detector main body Portion；The detector body top plane both ends are fixedly installed warning lamp, and warning lamp with alarm by being electrical connected It connects；Camera is fixedly installed between two alarms of the detector body top plane；The detector main body It is internally provided with single-chip microcontroller and AD conversion, and by being electrically connected between single-chip microcontroller and AD conversion；The detector main body back External memory is built-in in subordinate's transverse plane；The left end and right end sidewalls bottom of the detector main body are fixedly installed gas Dependent sensor, and gas sensor is connected with the acquisition bend pipe that top is arranged；At the top of the right end of the acquisition bend pipe on right side It is fixedly connected with flowline on port, and is fixedly connected with air-breathing wind at the top of the acquisition bend pipe left end top port on right side Road, and the structure of the acquisition bend pipe in left side is opposite with the acquisition bend pipe position on above-mentioned right side；The air-breathing air duct top Portion is provided with rotary electric machine, and the periphery that is connected with air-breathing air duct of rotary electric machine bottom sets up that there are six exhaust pipes, and And exhaust pipe top is connected to the bottom of the exhaust head at the top of rotary electric machine；It is provided on the back side wall of the detector main body Four symmetrical fixed inserted blocks, and backboard is installed and is connected as one by fixed inserted block with detector main body, and is fixed The groove of semicircle shape is offered at the top and bottom of inserted block；Circular fixation there are two symmetrically being opened up in the middle part of the installation backboard Hole.

2. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：The acquisition bend pipe generally half The ring structure of round shape, and acquire in bend pipe and be provided with a acquisition chimney filter altogether, and the contact terminal of gas sensor is built in It acquires in chimney filter.

3. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：It is opened vertically in the flowline Six circular inner pipes equipped with circular array, and it is provided with support column in the middle part of flowline, and support top end is fixed to connect It connects in the bottom of coniform dust cover, and the base diameter of dust cover is suitably larger than the diameter of flowline.

4. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：In being inside the air-breathing air duct Empty cylindrical cavity structure, and air-breathing air duct inner cavity top is the air-breathing paddle of rotary electric machine bottom, and above air-breathing paddle it is entering for exhaust pipe Mouthful.

5. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：The exhaust head is generally upper narrow Lower wide truncated cone structure, and there are four exhaust outlets for setting on the inclined-plane of exhaust head.

6. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：The top left of the installation backboard End and right end are provided with side guard plate downward vertically, and the depth of side guard plate is consistent with the fixed depth of inserted block.

7. small-sized toxic and harmful gas monitor as claimed in claim 6, it is characterised in that：The front side wall of the installation backboard Left end and right end be vertically installed with the side guard plates of two groups of symmetrical L shapes, and be also equipped with and side guard plate knot on fixed inserted block The adaptable L-type slot of structure.

8. small-sized toxic and harmful gas monitor as described in claim 1, it is characterised in that：The H-type plate is arranged two Between group side guard plate, H-type plate is enabled to be plugged on the inside of fixed inserted block, and the top horizontal of the H-type plate of lower section just It is fixedly installed gripping mechanism on face, and is also equipped with corresponding detent block on the back flat of detector main body.

9. small-sized toxic and harmful gas monitor as claimed in claim 8, it is characterised in that：Setting inside the gripping mechanism There is spring, and the top of spring is fixedly connected with the spacing head towards detector main body for scarf, and the right end of spacing head hangs down It is directly provided with and stirs pin, and offered on the side wall of gripping mechanism for stirring the notch that pin moves up and down, and detent block Bottom also offers the spacing head being adapted with spacing head.