CN104792673B - Direct-reading dust concentration detector with pressure differential detection function - Google Patents

Abstract

A kind of direct-reading dust concentration detector with pressure differential detection function, belongs to technical field of an environment-friendly safety facility.Including housing；Dust sampling head, is located on housing；Signal processing mechanism, is located at shell intracavitary；Membrane pump, is located at shell intracavitary；Signal receiving structure and signal transmitter structure, self corresponding state coordinate and are located at shell intracavitary；Dust catching device, is plugged between signal receiving structure and signal transmitter structure；Signal receiver seat governor motion, is located at shell intracavitary；Cap is fixed on housing, plate, feature is fixedly mounted in shell intracavitary：Also include pressure differential detection mechanism, be located at side of the installing plate towards cap, dust sampling head is connected with signal receiving structure, and membrane pump is connected with signal transmitter structure, pressure differential detection mechanism includes upper and lower bearing support, upper and lower matching seat and partition.Ensure that signal receiving structure receives the real optical signal from light source part；Ensure accuracy of detection；Avoid that artificially guides and supports and occur from rocking；Simple in construction and small volume.

Description

Direct-reading dust concentration detector with pressure differential detection function

Technical field

The invention belongs to technical field of an environment-friendly safety facility, and in particular to a kind of direct-reading powder with pressure differential detection function Dust concentration detector.

Background technology

The industry of dust, such as colliery, manufacture of cement industry, moulding compound are also easy to produce during production operation for those Industry, electronic powder materials industry, textile industry, food-processing industry（Flour mill）With chemical and medicine industry industry etc., It is generally necessary to be monitored by dust concentration detector to the dust concentration of swimming in the air of Work places, to take phase The Disposal Measures answered, on the one hand protection occupational population is healthy, on the other hand prevents from setting off an explosion because dust concentration is exceeded. Exploded in the past by the Mine Dust blast of media report, flour mill's blast, numb cotton mill's blast, metal product plant polishing departement （The especially big aluminum dust explosion accident occurred such as Jiangsu Province, China city of Kunshan Zhong Rong metallic articles Co., Ltd）Etc. because of air In dust concentration of swimming tend to saturation and meet electrostatic or naked light caused by.In addition, the occupational disease of the worker of above-mentioned industry such as silicon Lung is also universal because caused by the long-term dust infringement by Work places.With people to carrying out production strictly in line with rules and regulations, cleaning operation and safe construction And people-based concept is significantly improved, not only formulate for being not limited to the foregoing industry enumerated and operation field has been carried out The system of dust monitoring, and examined for the workman in operation field or a line post equipped with the dust concentration of various structure types Survey device（Such as it is similar to the sampling head of CN2800261Y structures）Or corresponding instrument（Such as similar to the double of CN2799901Y structures To membrane pump）, this is more universal in colliery.In addition, dust concentration detector is also the supervision work of environmental administration, safety supervision department etc. Tool.

Complete direct-reading dust concentration detector generally by signal transmitter structure, signal receiving structure, signal processing mechanism, Dust sampling head and membrane pump（Also referred to as extraction sector）Deng composition, and it can be seen in disclosed Chinese patent literature, typical case As invention patent mandate notification number CN102221519B recommend have " direct-reading dust concentration detector "（The patent is by the application People proposes）.It is more typical that as invention patent mandate notification number CN102419296B recommendations have, " direct-reading dust concentration is measured Instrument ", is evaluated in 0003-0004 sections of the specification of the CN102419296B to the CN101603912B shortcoming existed, And to signal receiving structure（Patent claims signal receiver seat）With signal transmitter structure（Patent claims signal projector seat）Between There is provided a governor motion, by the governor motion to signal receiving structure and signal transmitter structure i.e. to signal receiver seat with Signal projector seat the distance between according to need regulation（It for details, reference can be made to the 0007th to 0010 section of the patent specification）.

But can find that it has following shortcoming by the reading of the specification full text to foregoing CN102419296B：Its One, due to it has followed CN101603912B mentality of designing while CN101603912B deficiency is pointed out and dust-laden is empty Gas is introduced to the centre bore i.e. transmitter seat light hole of the signal projector seat of signal transmitter structure（Patent claims the first centre bore）, During actual use a part of dust that should be intercepted originally by dust catching device can thus fallen or even product naturally Gather the light source part i.e. light in the bottom as the structural system of signal transmitter structure and positioned at transmitter seat light hole to send out Penetrate on pipe, influence produced to detection next time because when detecting next time, due on light source part by dust covering or It is infected with, the signal that signal receiving structure is received not is actual signal, causes after signal processing mechanism processing and aobvious by dust Show the data distortion of screen display.Current disposal method is：Periodically or non-periodically light source part is wiped and used Ensure that it is cleaned, but not only easily undermine the light source part of fragility, and the operating burden extra to user's increase；Its Two, rational in infrastructure due to lacking predicts the measure of air mass flow change, thus is difficult to the accuracy of guarantee test result, because The inlet, outlet joint of signal receiving structure and signal transmitter structure be and also must be by pipeline respectively with membrane pump （Patent claims air extractor）And sampling head connection, and flow through the air in the pipeline being connected with membrane pump and fluctuate unavoidably, Then the air mass flow within the unit interval in the state of airwaves is not constant, floating in the air in the unit interval Trip dust concentration cannot truly reflect.Specifically, the unit interval of dust laden air introduced from dust sampling head is only made Interior flow is maintained at relatively steady state, could ensure direct-reading dust concentration detector within the defined time to environment In dust concentration of swimming accuracy of detection.

It is that this applicant has made positive and beneficial for above-mentioned prior art situation, it is necessary to be subject to rational modification Design and have passed through the simulated test of non-finite number of time（In the case where taking secrecy provision）, form and will be described below finally Technical scheme.

The content of the invention

The task of the present invention is to provide a kind of dust concentration of swimming helped avoid in the air to operation field The dust intercepted in detection process by dust catching device drops on the light source part of signal transmitter structure and uses guarantee naturally Signal receiving structure is able to receive actual signal and reflects True Data by signal processing mechanism, is conducive to being connected to membrane pump It is in well with signal transmitter structure and the air being connected in the pipeline between signal receiving structure and dust sampling head Steady flow condition and use and the dust that swims in air accurately detected, has and is easy to statically set with temporary support fixed form It is placed on the terrace in detected place and uses and avoid occurring rocking in detection process and being beneficial to significantly simplifying pressure differential detection The structure of mechanism is simultaneously reduced significantly volume and use convenient processing has pressure difference with installing and being easily serially connected with pipeline Detect the direct-reading dust concentration detector of function.

What the task of the present invention was performed by, a kind of direct-reading dust concentration detection with pressure differential detection function Instrument, including constitute the housing for having shell chamber；One dust sampling head, the dust sampling head is fixed on the wall body of the housing；One Signal processing mechanism, the signal processing mechanism is arranged on the shell intracavitary；One membrane pump, the membrane pump is arranged on the shell intracavitary And it is electrically connected with the signal processing mechanism；One signal receiving structure and a signal transmitter structure, the signal receiving structure With signal transmitter structure with self corresponding state cooperates and be arranged on described shell intracavitary and with the letter The electrical connection of number processing mechanism；One dust catching device, the dust catching device is plugged on the signal receiver in a state of use Between structure and signal transmitter structure；One is used to make the signal receiver seat of signal receiving structure displacement up or down to adjust Mechanism, signal receiver seat governor motion is arranged on the shell intracavitary in the position of the top corresponding to signal receiving structure simultaneously And be connected with signal receiving structure；Wherein：Fixed on described housing and in the position of the accent corresponding to the shell chamber There is a cap for being used to cover the accent of shell chamber shield, and an installing plate is fixed with shell intracavitary, described membrane pump, signal are received Mechanism and signal transmitter structure are arranged at the installing plate towards the side of the cap, and signal receiving structure and signal The position of trigger mechanism on a mounting board is located at the left side of installing plate, and the position of membrane pump on a mounting board is located at installing plate Right side, described signal receiver seat governor motion is supported on side of the installing plate towards cap, described signal processing mechanism It is located at the upper left side of shell chamber in the position of the shell intracavitary, it is characterised in that also include a pressure differential detection mechanism, pressure difference inspection Survey mechanism and the installing plate is arranged in the position of the top corresponding to the membrane pump towards the side of the cap, it is described Dust sampling head introduces pipe by dust laden air and is connected with described signal receiving structure, described membrane pump by muffler and Described signal transmitter structure connection, described pressure differential detection mechanism includes upper bearing support, lower supporting frame, upper matching seat, matched somebody with somebody down Joint chair and partition, upper bearing support are fixed on the installing plate described in by upper bearing support fixing screws with horizontal boom state The side of cap, lower supporting frame equally passes through lower supporting frame in the position of the lower section corresponding to upper bearing support with horizontal boom state Fixing screws are fixed on side of the installing plate towards cap, and are equipped between upper and lower bearing support one and are used for upper and lower branch The bearing support attachment screw that the one end of bolster away from installing plate links together, cooperation of the upper and lower matching seat to face each other State is arranged between upper and lower bearing support, and has matching seat chamber on one in the side composition of upper matching seat matching seat under, And matching seat intake interface on one is extended with the middle position on the top of upper matching seat, matching seat intake interface is matched somebody with somebody with this Joint chair chamber is communicated, and matching seat intake interface is stretched over the top of bearing support on this, is extended with the sidepiece of upper matching seat Matching seat outlet interface on one, matching seat outlet interface is communicated with upper matching seat chamber on this, and matching seat outlet connects on this One end of matching seat pneumatic tube on one is connected with mouth, other end of matching seat pneumatic tube is towards the signal processing mechanism on this Direction extend and be connected with a first pressure sensor, the first pressure force snesor is arranged on signal processing mechanism simultaneously And be electrically connected with signal processing mechanism, being constituted in lower matching seat towards the side of upper matching seat has matching seat chamber, under this Matching seat chamber is corresponding with the upper matching seat chamber, and matching seat outlet is extended with the middle position of the bottom of lower matching seat Interface, the lower matching seat outlet interface is communicated with lower matching seat chamber, and the lower matching seat outlet interface is stretched over lower supporting frame Lower section, be coupled in the sidepiece and being extended with the position of the lower section corresponding to upper matching seat outlet interface of lower matching seat Seat ventilation interface, the lower matching seat ventilation interface is communicated with lower matching seat chamber, and is connected on the lower matching seat ventilation interface There is one end of matching seat pneumatic tube, the direction of the other end towards the signal processing mechanism of the lower matching seat pneumatic tube is prolonged Stretch and be connected with a second pressure sensor, the second pressure sensor be arranged on signal processing mechanism and with signal Mechanism electrical connection is managed, partition is in the shape of semicircle valve body, and the partition is cooperated with being arranged on by the upper and lower matching seat chamber In the chamber being collectively forming afterwards, the passage for simultaneously communicating the upper matching seat intake interface with upper matching seat chamber by the partition A part for mouth and a part for the passway for communicating the lower matching seat outlet interface with lower matching seat chamber are blocked, described Upper matching seat intake interface and lower matching seat outlet interface tandem be connected on the pipeline of the muffler；In the housing Bottom middle position and the side of the shell chamber is provided with a tripod connecting plate, on the tripod connecting plate Offer a tripod connecting plate fixing hole for being used to fix tripod connecting plate and temporary support in the tripod on terrace.

In the specific embodiment of the present invention, received on described installing plate and corresponding to the signal Position between mechanism and signal transmitter structure offer one be used for for the dust catching device be inserted into signal receiving structure and Installing plate resigning hole between signal transmitter structure, on the rear wall body of housing and in the position corresponding to installing plate resigning hole A shape and size and installing plate resigning hole identical housing rear resigning hole are offered, described dust catching device is being used Inserted successively after housing rear resigning hole and installing plate resigning hole under state signal receiving structure and signal transmitter structure it Between；Described dust sampling head is arranged on the right wall body of housing, and it is soft that described dust laden air, which introduces pipe and muffler, Suitable flexible pipe；Described signal receiving structure includes signal receiver seat, gland, silicon optical sensor and receiver inlet suction port, In the bottom of the short transverse of signal receiver seat and centrally located composition has receiver seat light hole, and in signal Receiver seat offers a receiver seat air admission hole communicated with receiver seat light hole towards the side of the cap, and gland is solid Being scheduled on the top of signal receiver seat, and offer in the middle position of the gland one is used for for described signal receiver The screw rod lifting hole(eyelet) that governor motion is engaged, silicon optical sensor is set in the position of the top corresponding to receiver seat light hole On the silicon optical sensor stator, and the silicon optical sensor stator is arranged on the short transverse for being formed in signal receiver seat The stator intracavitary on top, and silicon optical sensor lead-out wire and the signal processing mechanism electrical connection of silicon optical sensor, Receiver inlet suction port is fixed on signal receiver seat in the position corresponding to receiver seat air admission hole, and is connect with described Device seat light hole is received to communicate；Described signal transmitter structure includes signal projector seat, light source part and transmitter return-air joint, Signal projector seat is fixed towards the side of the installing plate and installing plate, the signal projector short transverse it is placed in the middle Position, which is constituted, transmitter seat light hole, and transmitter seat light hole is corresponding with described receiver seat light hole, and Signal projector seat offers a transmitter seat return-air hole communicated with transmitter seat light hole, light towards the side of the cap Source block is arranged in light source part fixed seat in the position of the bottom corresponding to transmitter seat light hole, and by light source part Circuit is electrically connected with the signal processing mechanism, and the light source part fixed seat is fixed on the bottom of signal projector seat, hair Emitter return-air joint corresponding to transmitter seat return-air hole position be fixed on signal projector seat on, and with described transmitting Device seat light hole is communicated；Described dust sampling head leans out the right wall body of the housing back to the side of the shell chamber；Described Dust laden air introduces pipe and is connected with described receiver inlet suction port, and described muffler and described transmitter return-air joint Connection；The signal processing mechanism includes a data processing circuit plate and a data display screen, and data processing circuit plate is fixed on The rear wall body of the housing is towards the side of the shell chamber, and data display screen is arranged on the cap back to the side of the shell chamber And it is electrically connected with data processing circuit plate, described silicon optical sensor lead-out wire, light source part circuit, membrane pump, first Pressure sensor and second pressure sensor are electrically connected with the data processing circuit plate；The signal receiver seat is adjusted Section mechanism is connected in the position corresponding to the screw rod lifting hole(eyelet) with the gland.

In another specific embodiment of the present invention, described dust catching device includes a purpose filter leaf clip and a filter disc, One end of purpose filter leaf clip is corresponding to the signal projector after the housing rear resigning hole and installing plate resigning hole successively Between seat and signal receiver seat, and purpose filter leaf clip through hole is offered in one end of the purpose filter leaf clip, the purpose filter leaf clip through hole corresponds to Between the receiver seat light hole and transmitter seat light hole, the other end of purpose filter leaf clip is located at outside the shell chamber, and filter disc is seized on both sides by the arms On purpose filter leaf clip, and the filter disc the position of purpose filter leaf clip through hole simultaneously with receiver seat light hole and transmitter seat light hole Communicate；In signal receiver seat towards the side of signal projector seat and around receiver seat light hole The circumferencial direction in aperture offers the receiver seat seal groove of a surface for being depressed in signal receiver seat and insertion, at this Receiver seat sealing ring is embedded with receiver seat seal groove；In described signal projector seat towards signal receiver seat Side and the circumferencial direction in aperture around transmitter seat light hole offer one and be depressed in signal projector seat The transmitter seat seal groove of surface and insertion, transmitter seat seal groove is corresponding with receiver seat seal groove, and And transmitter seat sealing ring is embedded with, transmitter seat sealing ring is corresponding with receiver seat sealing ring, and when to described Signal receiver seat governor motion operation and make signal receiver seat come downwards to signal projector seat be in contact state when, institute The receiver seat sealing ring stated is engaged with described transmitter seat sealing ring and used to receiver seat light hole and hair The position that borders on of the edge in emitter seat light hole is sealed；The signal projector seat towards the signal receiver seat Side and constituted in the position corresponding to the installing plate resigning hole and have a purpose filter leaf clip slot, one end of described purpose filter leaf clip together with Described filter disc is plugged with the purpose filter leaf clip slot to be coordinated.

In another specific embodiment of the present invention, in described signal receiver seat towards the signal projector Seat side offer at least one pair of transmitter seat guide pillar hole, and signal projector seat towards signal receiver seat side simultaneously And a pair of transmitter seat guide pillars, this pair of transmitter seat guide pillar and one are extended with the position corresponding to a pair of transmitter seat guide pillar holes Transmitter seat guide pillar hole is slidably matched.

In another specific embodiment of the present invention, described signal receiver seat bindiny mechanism include nutplate, Bolt and nut, screw rod, spring and knob, nutplate are fixed on the installing plate towards the cap with the state of horizontal boom Side and the top for corresponding to signal receiver seat, position of the bolt and nut in the top corresponding to the screw rod lifting hole(eyelet) It is arranged in nutplate, middle part and the bolt and nut screw thread of screw rod coordinate, and the upper end of screw rod is stretched through the roof body of the housing Open up outside the shell chamber, and the lower end of screw rod is stretched over the lower section of the gland by way of screw rod lifting hole(eyelet), and under the screw rod End composition has a jump-ring slot, and a jump ring for being used to make screw rod be connected with gland is provided with the jump-ring slot, and spring is nested with spiral shell The lower end of bar, and the upper end of the spring is supported on nutplate towards the side of signal receiver seat, and the lower end of spring is supported On jump ring, knob is fixed on the upper end of screw rod.

In the also specific embodiment of the present invention, on the roof body of the housing and corresponding to described The position of screw rod offers a screw hole, and the upper end of the screw rod is stretched over outside the shell chamber by way of screw hole, on the top of housing A handle is provided with wall body and back to the side of shell chamber.

In a still more specific embodiment of the invention, described membrane pump includes motor, eccentric disc, connecting rod, pump Seat, valve film, valve plate, valve sheet, the pump housing and pump seat lid, motor are electrically connected with the data processing circuit plate and with horizontally-arranged shape State is fixed on motor cabinet, and side of the motor cabinet with pump seat under is fixed, and the motor shaft of motor passes through motor cabinet and led to Cross motor axle bearing to be rotatably supported on motor cabinet, eccentric disc is fixed on motor shaft, and in the eccentric disc towards connecting rod Side be fixed with an eccentric disk shaft, the side of pump seat and the installing plate towards the cap is fixed, the pump seat constitute have one Pump housing accommodating chamber, valve film is arranged in pump housing accommodating chamber and positioned at the bottom of pump housing accommodating chamber, upper end and the valve film of connecting rod Central part is fixedly connected, and the lower end of connecting rod is connected with the eccentric disk shaft, and the lower containment of the pump housing is accommodated in the pump housing Intracavitary, the bottom surface of the pump housing is contacted with the edge of the circumferencial direction of valve film and side composition of the pump housing under has one Valve plate accommodating chamber, and have a pump housing air intake duct and a pump housing blast pipe towards upper side composition in the pump housing, the pump housing air-breathing Pipe and pump housing blast pipe are communicated with valve plate accommodating chamber, and valve plate is arranged in valve plate accommodating chamber and fixed with the pump housing, in the valve One is offered on plate from the upside insertion of the thickness direction of valve plate to the valve plate suction hole and a valve plate steam vent of downside, valve plate suction Stomata is corresponding with the aspiration lumen of pump housing air intake duct, and valve plate steam vent is corresponding with the exhaust tube chamber of pump housing blast pipe, valve Door piece is arranged in valve plate accommodating chamber and is shelved on the top of valve plate, and a suction valve chip and a row are provided with the valve sheet Air valve plate, suction valve chip is corresponding with described valve plate suction hole, and exhaust valve plate is corresponding with described valve plate steam vent, and And when suction valve chip is in the state blocked to the valve plate suction hole, the exhaust valve plate is in the valve plate steam vent The state of unlatching, and when suction valve chip is in the state opened to valve plate suction hole, exhaust valve plate is in valve plate steam vent The state of closing, the position that pump seat covers in the top corresponding to the pump housing is fixed with pump seat towards upper side, and in the pump seat The middle position of lid offers a pump housing resigning hole, and the top of the pump housing leans out described in the position corresponding to pump housing resigning hole Pump housing accommodating chamber, the top of described exhaust tube chamber communicated with the shell chamber, and the air intake duct is connected with the muffler.

The present invention's and then in a specific embodiment, expand in the upper end of the connecting rod and be provided with a discoidal connecting rod Fixed seat, the connecting rod fixed seat corresponds to the lower section of the central part of the valve film, and the top of valve film is provided with a valve Mould plate, the valve mould plate is corresponding with connecting rod fixed seat and is fixed with connecting rod fixed seat, and being constituted in the lower end of connecting rod has one Bearing hole, is provided with a bearing in the bearing hole, and the center of the bearing has an eccentric disk shaft mating holes, and the eccentric disk shaft is matched somebody with somebody Hole is closed to be engaged with described eccentric disk shaft.

Offered in yet a further embodiment of the present invention in the distal end faces of described eccentric disk shaft One back-up ring screw hole, being fixed with one by back-up ring screw in the position corresponding to the back-up ring screw hole is used to stop the connecting rod And use the back-up ring for avoiding connecting rod from shaking off from eccentric disk shaft.

In the present invention again and then in a specific embodiment, the partition is simultaneously by the upper matching seat intake interface A part for the passway communicated with upper matching seat chamber and the lower matching seat outlet interface communicated with lower matching seat chamber The coverage extent that a part for passway is blocked is 1/2nd or 2/5ths of the diameter of the passway.

One of technique effect of technical scheme that the present invention is provided, due on the premise of technology prejudice is overcome by dust-laden Air introduction is connected between signal receiving structure and dust sampling head, thus floating in the air intercepted by dust catching device Trip dust will not drop to the light source portion of the bottom in the transmitter seat light hole of the signal projector seat positioned at signal transmitter structure It on part, thus can ensure that signal receiving structure is able to receive the real optical signal for coming from light source part, make signal processor Structure is to real optical signal prosessing and reflects real processing data；Two, due in connection signal transmitter structure and membrane pump Muffler pipeline on concatenated a pressure differential detection mechanism, thus the pressure difference signal of detection is fed back to by pressure differential detection mechanism Signal processing mechanism and the operating rate of membrane pump is controlled by signal processing mechanism, air-flow is kept stable, finally Ensure the accuracy of detection to the dust that swims in air；Three, because the middle position of the bottom in housing is provided with tripod Connecting plate, thus the present invention can be statically arranged to the ground in tested place with temporary support fixed form by means of tripod On level ground, it is to avoid appear in the shaking phenomenon in detection process by artificially guiding and supporting；Four, due to the knot of whole pressure differential detection mechanism Structure is simple and small volume, thus not only processing with it is easy for installation, but also can effectively be connected in series in the pipeline of muffler On.

Brief description of the drawings

Fig. 1 is embodiments of the invention structure chart.

Fig. 2 is Fig. 1 front schematic view.

Fig. 3 is that Fig. 1 removes the schematic diagram after cap.

Fig. 4 is the detailed structure view of the pressure differential detection mechanism shown in Fig. 1.

Fig. 5 is the detailed structure view of the membrane pump shown in Fig. 1.

Embodiment

In order that the auditor of the Patent Office especially public can be more clearly understood from the technical spirit of the present invention and have Beneficial effect, applicant will elaborate by way of examples below, but the description to embodiment is not to this hair The limitation of bright scheme, any only formal rather than substantial equivalent transformation according to made by present inventive concept all should It is considered as technical scheme category.

It is every in the following description to be related to upper and lower, left and right, the directionality of front and rear（Or claim directionality）Concept It is for the figure location state being described, it is therefore intended that facilitate public understanding, thus can not be by it It is interpreted as being particularly limited to the technical scheme of the invention provided.

Fig. 1 is referred to, one is given and is for example preferred to use the housing that ABS plastic shapes through Mold Making by nonmetallic materials 1, the housing 1, which is constituted, a shell chamber 11（Also housing chamber can be claimed, it is as follows）；Give a dust sampling head 2, the dust sampling head 2 are fixed on the wall body of housing 1；A signal processing mechanism 3 is given, the signal processing mechanism 3 is arranged in shell chamber 11；Provide One membrane pump 4, the membrane pump 4 is arranged in shell chamber 11 and is electrically connected with signal processing mechanism 3；A signal is given to connect The signal transmitter structure 6 of mechanism 5 and one is received, the signal receiving structure 5 is with signal transmitter structure 6 with self corresponding state phase Mutually coordinate and be arranged in foregoing shell chamber 11 and be electrically connected with signal processing mechanism 3；Give a dust catching device 7, the dust catching device 7 is plugged between aforementioned signal receiving mechanism 5 and signal transmitter structure 6 in a state of use；Give One for making the signal receiver seat governor motion 8 of the displacement up or down of signal receiving structure 5, signal receiver seat Governor motion 8 is arranged in foregoing shell chamber 11 and and signal receiver in the position of the top corresponding to signal receiving structure 5 Structure 5 is connected.

Foregoing dust sampling head 2 introduces pipe 10a by dust laden air and is connected with foregoing signal receiving structure 5, foregoing Membrane pump 4 be connected by muffler 10b with foregoing signal transmitter structure 6, and on muffler 10b pipeline concatenate （Concatenation, which refers to, to be connected in series）Have a pressure differential detection mechanism 9, the pressure differential detection mechanism 9 be fixed in shell chamber 11 and with foregoing letter Number processing mechanism 3 is electrically connected.

From the preceding paragraph explanatory note, due to instant invention overcomes the technology prejudice in prior art by dust laden air Introduce pipe 10a to be connected between dust sampling head 2 and signal receiving structure 5, muffler 10b is connected to membrane pump and with signal launched Between mechanism 6, thus preferable accuracy of detection is can ensure that, because the dust intercepted in dust catching device 7 will not be to fall naturally Form fall or be deposited to the light source part 62 of signal transmitter structure 6（Below it is also mentioned that）On, so as to be able to objectively One of technique effect referred in the superincumbent technique effect column of embodiment applicant.Again due to setting up for pressure differential detection mechanism 9 Obtain so that signal processing mechanism 3 obtains the pressure difference signal of air-flow and the rotating speed of the motor 41 of membrane pump 4 is entered according to pressure difference signal Row adjustment, the flowing of the dust laden air for flowing through dust laden air introducing pipe 10a and the air for flowing through muffler 10b is maintained at nothing Rise and fall sharply and quickly the plateau fluctuated, so as to objectively cash the technology effect described in the superincumbent technique effect column of applicant The two of fruit.

Cap fixing screws 121 are used on foregoing housing 1 and in the position of the accent corresponding to foregoing shell chamber 11 A cap 12 for being used to cover the accent of shell chamber 11 shield is fixed with, and is fixed in shell chamber 11 by installing plate fixing screws 1112 Have an installing plate 111, also show in Fig. 1 be formed in housing rear body towards the side of shell chamber 11 and fixed with installing plate The corresponding screw fixed seat 16 of screw 1112, installing plate fixing screws 1112 are fixed with the screw fixed seat 16.In the installation On plate 111 and offered corresponding to the position between aforementioned signal receiving mechanism 5 and signal transmitter structure 6 one be used for supply before The dust catching device 7 stated is inserted into the installing plate resigning hole 1111 between signal receiving structure 5 and signal transmitter structure 6, and shell A shape is offered on the rear wall body of body 1 and in the position corresponding to installing plate resigning hole 1111 and size allows with installing plate Position hole 1111 identical housing rear resigning hole 13, foregoing dust catching device 7 is in a state of use successively by way of housing rear Inserted after resigning hole 13 and installing plate resigning hole 1111 between signal receiving structure 5 and signal transmitter structure 6.Foregoing membrane pump 4th, signal receiving structure 5, signal transmitter structure 6 and pressure differential detection mechanism 9 are arranged at installing plate 111 towards the one of cap 12 Side, as shown in Figure 1, the position of signal receiving structure 5 and signal transmitter structure 6 on installing plate 111 are located at a left side for installing plate 111 Side, i.e., positioned at installing plate 111 length direction left end, and position of the membrane pump 4 on installing plate 111 be located at installing plate 111 Right side, i.e., positioned at installing plate 111 length direction right-hand member, pressure differential detection mechanism 9 correspond to membrane pump 4 top.It is foregoing Signal receiver seat governor motion 8 be supported on installing plate 111 towards the side of cap 12；Foregoing signal processing mechanism 3 exists Position in shell chamber 11 is located at the upper left side of shell chamber 11；Foregoing dust sampling head 2 is arranged on the right wall body of housing 1；It is foregoing Dust laden air introduce pipe 10a and muffler 10b be submissive flexible pipe, submissive flexible pipe, which is preferably selected, uses pvc pipe, but also may be used Select with similar pipe such as rubber tube, etc..

Preferably, battery 112 is set in the shell chamber 11, by battery 112 be signal processing mechanism 3, signal receiving structure 5, Signal transmitter structure 6 and membrane pump 4 provide power supply support.And then, in the bottom of housing 1 i.e. in shell bottom wall（Back to shell chamber 11 side）One piece of tripod connecting plate 18 is set, a fixing hole is offered on the tripod connecting plate 18, fixing hole is used for It is connected with company with present invention band to the tripod in detection place, so as to embody what is referred in the superincumbent technique effect column of applicant Corresponding technique effect.

As shown in Figure 1, a dust sampling head connecting seat 17, foregoing dust sampling are fixed with the right wall body of housing 1 First 2 are threadedly coupled with the dust sampling head connecting seat 17, and whole dust sampling head 2 is located at outside shell chamber 11, foregoing dust-laden Air introduction 10a is fixed towards one end of dust sampling head 2 with dust sampling head connecting seat 17（Inserting is fixed）.Due to dust The concrete structure of sampling head 2 belongs to known technology, for example, may refer to Chinese patent CN2800261Y, thus applicant no longer opens up Open explanation.

Please continue to refer to Fig. 1, the structure that is preferred rather than being definitely limited to of foregoing signal receiving structure 5 is as follows：Including signal Receiver seat 51, gland 52, silicon optical sensor 53 and receiver inlet suction port 54, in the short transverse of signal receiver seat 51 Bottom and centrally located composition have a receiver seat light hole 511, and in signal receiver seat 51 towards foregoing cap 12 side offers a receiver seat air admission hole 512 communicated with receiver seat light hole 511, and gland 52 passes through gland screw 522 are fixed on the top of signal receiver seat 51, and offer in the middle position of the gland 52 one and be used for for foregoing letter The screw rod lifting hole(eyelet) 521 that number receiver seat governor motion 8 is engaged, silicon optical sensor 53 is corresponding to receiver seat light hole 511 The position of top be arranged on silicon optical sensor stator 532, and the silicon optical sensor stator 532 is arranged on and is formed in letter In the fixation piece chamber 513 on the top of the short transverse of number receiver seat 51, and the silicon optical sensor of silicon optical sensor 53 is drawn Line 531 is electrically connected with aforementioned signal processing mechanism 3, and receiver inlet suction port 54 is corresponding to receiver seat air admission hole 512 Position is fixed on signal receiver seat 51, and is communicated with receiver seat light hole 511.In the present embodiment, foregoing silicon Optical sensor 53 be preferred, but not limited to select with being produced by Chinese Anhui Boyuan Automation Instrument Co., Ltd. of Anhui Province and In the type silicon optical sensors of model AATM- II of market public offering before the application proposition.As preferred scheme, may be used also A silicon optical sensor is set to protect in foregoing fixation piece chamber 513 and in the position of the top corresponding to silicon optical sensor 53 Plate 5131.

The structure that is preferred rather than being definitely limited to of foregoing signal transmitter structure 6 is as follows：Including signal projector seat 61, light Source block 62 and transmitter return-air joint 63, signal projector seat 61 is towards the side of foregoing installing plate 111 using transmitter seat Fixing screws 616 are fixed with installing plate 111, and being constituted in the middle position of the short transverse of signal projector seat 61 has a transmitting Device seat light hole 611, transmitter seat light hole 611 is corresponding with foregoing receiver seat light hole 511, and in signal transmitting Device seat 61 offers a transmitter seat return-air hole 612 communicated with transmitter seat light hole 611, light source towards the side of cap 12 Part 62 is arranged in light source part fixed seat 622 in the position of the bottom corresponding to transmitter seat light hole 611, and by light Source block circuit 621 is electrically connected with aforementioned signal processing mechanism 3, and the light source part fixed seat 622 is fixed on signal transmitting The bottom of device seat 61, transmitter return-air joint 63 is fixed on signal projector in the position corresponding to transmitter seat return-air hole 612 On seat 61, and communicated with foregoing transmitter seat light hole 611., can also be corresponding to light source part as preferred scheme A protecting cover 6221 is set up in the lower section of fixed seat 622, and the bottom of the protecting cover 6221 and signal projector seat 61 is fixed.Light source part 62 It is essentially infrared light emission pipe.

Due to having already mentioned above, whole dust sampling head 2 is located at outside shell chamber 11, thus has confirmed dust sampling head 2 simultaneously The right wall body of housing 1 is leant out back to the saying of the side of shell chamber 11.The receiver that foregoing dust laden air introduces pipe 10a directions enters One end of gas joint 54 is connected with receiver inlet suction port 54, and foregoing muffler 10b is towards transmitter return-air joint 63 One end is connected with transmitter return-air joint 63.Foregoing pressure differential detection mechanism 9 corresponds to letter in the state of with membrane pump 4 The right side of number receiver seat 51.

Foregoing dust catching device 7 includes a purpose filter leaf clip 71 and a filter disc 72, and one end of purpose filter leaf clip 71 is successively by way of preceding State and aforementioned signal transmitter seat 51 and signal receiver seat are corresponded to after housing rear resigning hole 13 and installing plate resigning hole 1111 Between 61, and purpose filter leaf clip through hole 711 is offered in one end of the purpose filter leaf clip 71, the purpose filter leaf clip through hole 711 corresponds to foregoing connect Receive between device seat light hole 511 and transmitter seat light hole 611, the other end of purpose filter leaf clip 71 is located at outside shell chamber 11, and filter disc 72 is held under the arm Hold on purpose filter leaf clip 71, and the filter disc 72 the position of purpose filter leaf clip through hole 711 simultaneously with receiver seat light hole 511 and hair Emitter seat light hole 611 is communicated, and is existed to will go into the dust in receiver seat light hole 511 in dust laden air by filter disc 72 Intercepted corresponding to the position of purpose filter leaf clip through hole 711.Furthermore according to professional general knowledge, filter disc 72 can be changed.

The side of foregoing signal receiver seat 51 towards aforementioned signal transmitter seat 61 is offered a pair（Can also be two It is right）Transmitter seat guide pillar hole 514, and in signal projector seat 61 towards the side of signal receiver seat 51 and corresponding to one It is extended with a pair of transmitters seat guide pillars 613 to the position of transmitter seat guide pillar hole 514, this pair of transmitter seat guide pillar 613 and a pair Transmitter seat guide pillar hole 514 is slidably matched.This structure design has confirmed what is referred in the superincumbent technique effect column of applicant Corresponding technique effect.

Refer to Fig. 4 and combine Fig. 1, the foregoing pressure differential detection mechanism 9 positioned at the right side of signal receiver seat 51 is wrapped Bearing support 91, lower supporting frame 92, upper matching seat 93, lower matching seat 94 and partition 95 are included, upper bearing support 91 passes through upper bearing support Fixing screws 911 are fixed on the installing plate 111 towards the side of the cap 12 with horizontal boom state, and lower supporting frame 92 exists By the way that lower supporting frame fixing screws 921 are same peace is fixed on horizontal boom state corresponding to the position of the lower section of upper bearing support 91 Plate 111, which is filled, towards the side of cap 12, and is equipped with one between upper and lower bearing support 91,92 is used for upper and lower bearing support 91st, the bearing support attachment screw 96 that 92 one end away from installing plate 111 link together, upper and lower matching seat 93,94 is with face each other The mated condition on opposite is arranged between upper and lower bearing support 91,92, and in the side of the upper matching seat 94 under of matching seat 93 Composition has matching seat chamber 931 on one, and is extended with matching seat intake interface on one in the middle position on the top of upper matching seat 93 932, matching seat intake interface 932 is communicated with upper matching seat chamber 931 on this, and on this matching seat intake interface 932 through upper Bearing support 91 and the top for being stretched over bearing support 91, matching seat outlet interface on one is extended with the sidepiece of upper matching seat 93 933, matching seat outlet interface 933 is communicated with upper matching seat chamber 931 on this, and is connected on this on matching seat outlet interface 933 One end of matching seat pneumatic tube 9331 on one is connected to, other end of matching seat pneumatic tube 9331 is towards aforementioned signal processor on this The direction of structure 3 extends and is connected with a first pressure sensor 93311, and the first pressure force snesor 93311 is arranged on letter It is electrically connected on number processing mechanism 3 and with signal processing mechanism 3, is constituted in lower matching seat 94 towards the side of upper matching seat 93 There is matching seat chamber 941, the lower matching seat chamber 941 is corresponding with foregoing upper matching seat chamber 931, in the bottom of lower matching seat 94 Middle position be extended with matching seat outlet interface 942, the lower matching seat outlet interface 942 and the lower phase of matching seat chamber 941 It is logical, and the lower matching seat outlet interface 942 is stretched over the lower section of lower supporting frame 92 through lower supporting frame 92, in lower matching seat 94 sidepiece and be extended with the position of the lower section corresponding to upper matching seat outlet interface 933 matching seat ventilation interface 943, the lower matching seat ventilation interface 943 is communicated with lower matching seat chamber 941, and is connected on the lower matching seat ventilation interface 943 One end of matching seat pneumatic tube 9431 is connected to, the other end of the lower matching seat pneumatic tube 9431 is towards aforementioned signal processor The direction of structure 3 extends and is connected with a second pressure sensor 94311, and the second pressure sensor 94311 is arranged on signal It is electrically connected on processing mechanism 3 and with signal processing mechanism 3, partition 95 is in the shape of semicircle valve body, and the partition 95 is with setting , simultaneously will be foregoing by the partition 95 in the chamber being collectively forming after being cooperated by foregoing upper and lower matching seat chamber 931,941 A part for the passway that upper matching seat intake interface 932 is communicated with upper matching seat chamber 931 and by foregoing lower matching seat outlet A part for the passway that interface 942 is communicated with lower matching seat chamber 941 is blocked, foregoing upper matching seat intake interface 932 and Lower matching seat outlet interface 942 is serially connected on foregoing muffler 10b pipeline.Here the partition 95 said on will be foregoing while match somebody with somebody A part for the passway that joint chair intake interface 932 is communicated with upper matching seat chamber 931 and by lower matching seat outlet interface 942 with The degree that a part for the passway that lower matching seat chamber 941 is communicated is blocked in the present embodiment for passway diameter two/ One, as go up the diameter of matching seat intake interface 932 and lower matching seat outlet interface 942（Internal diameter）1/2nd, but It can be 2/5ths, or even be 1/3rd.It follows that the concept of foregoing " part " is upper matching seat air inlet connecting The diameter of mouth 932 and lower matching seat outlet interface 942（Internal diameter）1/2nd, 2/5ths or 1/3rd.

Come from upper matching seat intake interface 932 of the muffler 10b air-flow through upper matching seat 93 and enter upper matching seat chamber 931, the region through not obstructed by partition 95 enters the lower matching seat outlet interface 942 of lower matching seat 94, and then enters further below The membrane pump 4 to be described in detail.When there is airwaves situation, by by way of upper matching seat intake interface 932 and lower matching seat Air in outlet interface 942 namely the air in upper and lower matching seat chamber 931,941 are through the upper and of matching seat pneumatic tube 9331 Lower matching seat pneumatic tube 9431 feeds back to first pressure sensor 93311 and second pressure sensor 94311 respectively, is by following The signal processing mechanism 3 that will be described makes air-flow keep stable the adjustment of rotational speed of the motor 41 of membrane pump 4（That is current stabilization）, finally Accuracy of detection is set to ensure.

Refer to Fig. 2, Fig. 3 and still combine Fig. 1, foregoing signal processing mechanism 3 includes a data processing circuit plate 31 and a data display screen 32, data processing circuit plate 31 is fixed on the rear wall of foregoing housing 1 by circuit board fixing screws 311 Body is towards the side of foregoing shell chamber 11, data display screen 32（Fig. 2 shows）Foregoing cap 12 is arranged on back to the side of shell chamber 11 simultaneously And be electrically connected with data processing circuit plate 31.Foregoing silicon optical sensor lead-out wire 531, light source part circuit 621, membrane pump 4th, first pressure sensor 93311 and second pressure sensor 94311 are electrically connected with aforementioned data process circuit plate 31. As shown in Figure 3, first, second pressure sensor 93311,94311 is arranged on data processing circuit plate 31.

It also show being installed on housing 1 and be connected with the electrical control of aforementioned data process circuit plate 31 in Fig. 1 Switchboard 18（Switchboard 18 can also claim guidance panel）, it is provided with the switchboard 18 to operator's prompting operation such as The information of " selection ", " confirmation ", " cancellation " etc（Fig. 2 shows）.

Please emphasis see Fig. 1, foregoing signal receiver seat bindiny mechanism 8 includes nutplate 81, bolt and nut 82, screw rod 83rd, spring 84 and knob 85, nutplate 81 are fixed on foregoing installing plate 111 towards the side of cap 12 with the state of horizontal boom And corresponding to the top of aforementioned signal receiver seat 51, bolt and nut 82 is in the top corresponding to foregoing screw rod lifting hole(eyelet) 521 Position is arranged in nutplate 81, and middle part and the screw thread of bolt and nut 82 of screw rod 83 coordinate, and the upper end of screw rod 83 passes through foregoing shell The roof body of body 1 is stretched over outside shell chamber 11, and the lower end of screw rod 83 is being stretched over gland 52 after foregoing screw rod lifting hole(eyelet) 521 Lower section（Enter in foregoing fixed piece chamber 513）, and constituted in the lower end of the screw rod 83 around the circumferencial direction of screw rod 83 Have jump-ring slot 831, be embedded with the jump-ring slot 831 one be used for screw rod 83 is connected with gland 52 jump ring 832, specifically and Speech, limits screw rod 83 by jump ring 832 and deviates from from screw rod lifting hole(eyelet) 521, it is to avoid screw rod 83 is separated with gland.In addition, in order to protect Silicon optical sensor 53, can be set in foregoing fixation piece chamber 513 and in the position of the top corresponding to silicon optical sensor 53 One silicon optical sensor protection board 5131, the effect of the silicon optical sensor protection board 5131 is：Avoid screw rod 83 excessively to bottom offset When undermine silicon optical sensor 53.Spring 84 is nested with the lower end of screw rod 83, and the upper end of the spring 84 is supported on nutplate 81 Towards the side of signal receiver seat 51, and the lower end of spring 84 is supported on jump ring 832.Knob 85 passes through knob fixing screws 851 are fixed on the upper end of screw rod 83.It follows that the lower end of screw rod 83 is in the position corresponding to screw rod lifting hole(eyelet) 521 and gland 52 Connection, to drive signal receiver 51 upper and lower displacements of seat by gland 52 by the suitable reverse rotation of screw rod 83.

Preferably, on the roof body of foregoing housing 1 and a screw rod is offered in the position corresponding to foregoing screw rod 83 Hole 14, the upper end of foregoing screw rod 83 by way of（Pass through）Screw hole 14 is stretched over outside foregoing shell chamber 11, on the roof body of housing 1 simultaneously And the side of shell chamber 11 is provided with a handle 15.

Fig. 1 is still referred to, in aforementioned signal receiver seat 51 towards the side of aforementioned signal transmitter seat 61 i.e. in signal The downside of receiver seat 51（Bottom surface）The circumferencial direction in aperture upper and around foregoing receiver seat light hole 511 is offered One is depressed in the surface of signal receiver seat 51（Basal surface）And the receiver seat seal groove 515 of insertion, in the receiver Receiver seat sealing ring 5151 is embedded with seat seal groove 515；Received in foregoing signal projector seat 61 towards signal The side of device seat 51 is the upper side in signal projector seat 61（Top surface）It is upper and around transmitter seat light hole 611 The circumferencial direction in aperture offers the transmitter seat seal groove of a surface for being depressed in signal projector seat 61 and insertion 614, transmitter seat seal groove 614 is corresponding with receiver seat seal groove 515, and is embedded with transmitter seat sealing Circle 6141, transmitter seat sealing ring 6141 is corresponding with receiver seat sealing ring 5151, and when to the signal receiver The knob 85 of seat governor motion 8 operates and signal receiver seat 51 is come downwards to the state being in contact with signal projector seat 61 When, foregoing receiver seat sealing ring 5151 is engaged with described transmitter seat sealing ring 6141 and used to the receiver Seat light hole 511 borders on position sealing with the edge in transmitter seat light hole 611, and vice versa.In aforementioned signal hair Emitter seat 61 is towards the side of aforementioned signal receiver seat 51 and in the position structure corresponding to foregoing installing plate resigning hole 1111 Into there is purpose filter leaf clip slot 615, one end of foregoing purpose filter leaf clip 71 is matched somebody with somebody together with foregoing filter disc 72 with the purpose filter leaf clip slot 615 plug Close.From the explanation of this section of word：The dust catching device 7 repeatedly mentioned above is located at signal receiver seat 51 and launched with signal Concept between device seat 61 substantially refers to that dust catching device 7 connects in the state of purpose filter leaf clip slot 615 is inserted in positioned at signal Receive between device seat 51 and signal projector seat 61.

When operator operates clockwise to knob 85, screw rod 83 is made in the shape being engaged with bolt and nut 82 by knob 85 Turned clockwise under state and descending, because the lower end surface of screw rod 83 is corresponding with silicon optical sensor protection board 5131, thus The active force to bottom offset is applied to silicon optical sensor protection board 53 when screw rod 83 is descending, forces signal picker seat 51 to follow Foregoing a pair of transmitters seat guide pillar 613 is descending, makes receiver seat sealing ring 5151 and transmitter seat sealing ring 6141 good each other Good contact, it is to avoid outwardly spread from the light that light source part 62 is launched to transmitter seat light hole 611, that is, avoid light leak, it is ensured that Response effect of the silicon optical sensor 53 to optical signal.Detection terminates and dust catching device 7 to be taken out and/or to signal receiving structure 5 and during signal transmitter 6 inspection of structure, then turn knobs 85 counterclockwise.

Refer to Fig. 5 and continuing with Fig. 1, foregoing membrane pump 4 includes motor 41, eccentric disc 42, connecting rod 43, pump seat 44th, valve film 45, valve plate 46, valve sheet 47, the pump housing 48 and pump seat lid 49, motor 41 and foregoing data processing circuit plate 31 are electric Connect and be fixed on by motor fixing screws 413 with horizontally-arranged state on motor cabinet 412, and motor cabinet 412 and the court of pump seat 44 Downward side is fixed, and the motor shaft 411 of motor 41 is rotationally supported through motor cabinet 412 and by motor axle bearing 4111 On motor cabinet 412, the middle position of eccentric disc 42, which is constituted, a motor shaft mating holes 422, the motor shaft mating holes 422 and electricity Arbor 411 is engaged, i.e. the insertion motor shaft of motor shaft 411 mating holes 422, and by being arranged on eccentric disc 42 and motor shaft Eccentric disc 42 is securely fixed on motor shaft 411 by the eccentric disc fixing screws 423 that mating holes 422 is communicated, in the eccentric disc 42 are fixed with an eccentric disk shaft 421 towards the side of connecting rod 43, and pump seat 44 supports corner fittings 442 and by means of supporting by pump seat Corner fittings fixing screws 4421（Fig. 1 shows）Fixed with the side of foregoing installing plate 111 towards foregoing cap 12, and corresponding to foregoing The lower section of lower matching seat outlet interface 942（Fig. 1 shows）, the pump seat 44, which is constituted, a pump housing accommodating chamber 441, and valve film 45 is arranged on pump In body accommodating chamber 441 and positioned at the bottom of pump housing accommodating chamber 441, the upper end of connecting rod 43 is fixed with the central part of valve film 45 to be connected Connect, and the lower end of connecting rod 43 is connected with eccentric disk shaft 421, the lower containment of the pump housing 48 is in foregoing pump housing accommodating chamber 441, the pump The bottom surface of body 48 is contacted with the edge of the circumferencial direction of valve film 45 and side composition of the pump housing 48 under has a valve Plate accommodating chamber 481, and have a pump housing air intake duct 482 and a pump housing blast pipe 483 towards upper side composition in the pump housing 48, should Pump housing air intake duct 482 and pump housing blast pipe 483 are communicated with valve plate accommodating chamber 481, and valve plate 46 is arranged in valve plate accommodating chamber 481 And by a pair of valve plate fixing screws 463 in the position corresponding to the pump housing screw 484 being preset on the pump housing 48 and the pump housing 48 It is fixed, a He of valve plate suction hole 461 from the upside insertion of the thickness direction of valve plate 46 to downside is offered on the valve plate 46 One valve plate steam vent 462, valve plate suction hole 461 is corresponding with the aspiration lumen 4821 of pump housing air intake duct 482, and valve plate steam vent 462 is corresponding with the exhaust tube chamber 4831 of pump housing blast pipe 483, and valve sheet 47 is arranged in valve plate accommodating chamber 481 and shelved In the top of valve plate 46, be provided with a suction valve chip 471 and an exhaust valve plate 472 on the valve sheet 47, suction valve chip 471 with Described valve plate suction hole 461 is corresponding, and exhaust valve plate 472 is corresponding with described valve plate steam vent 462, as shown in Figure 5, A pair of valve sheet screws are offered on valve sheet 47 and in the position corresponding to a pair of foregoing valve plate fixing screw holes 463 Hole 473, a pair of valve plate fixing screws 463 with pump housing screw hole 484 through fixing after this pair of valve sheet screw hole 473.And When suction valve chip 471 is in the state blocked to valve plate suction hole 461, foregoing exhaust valve plate 472 is in valve plate steam vent 462 open states, and when suction valve chip 471 be in valve plate suction hole 461 is opened state when, exhaust valve plate 472 be in pair The state that valve plate steam vent 462 is closed, a pump seat lid screw hole 492, i.e. pump seat are respectively offered in four corners of pump seat lid 49 Lid screw hole 492 has four, using four pump seat lid fixing screws 4921 in the position corresponding to pump seat lid screw hole 492 by pump Flap 49 is fixed in the position of the top corresponding to the pump housing 48 with the pump seat screw hole 443 that is preset on pump seat 44, and by four In individual pump seat lid fixing screws 4921 with aforementioned motor seat 412 two corresponding pump seat lid fixing screws（Two pump seats The length of lid fixing screws is more than the length of other two pump seat lid fixing screws）After pump seat screw hole 443 and then revolving Enter to defaulting in the motor cabinet screw 4121 on motor cabinet 412.Pump housing resigning is offered in the middle position of pump seat lid 49 Hole 491, the top of the foregoing pump housing 48 leans out pump housing accommodating chamber 441 in the position corresponding to pump housing resigning hole 491.Foregoing exhaust The top of tube chamber 4831 is communicated with shell chamber 11, that is to say, that the air discharged by pump housing blast pipe 483 enters shell chamber 11.By foregoing Illustrate and from diagram, because air intake duct 482 is communicated with lower matching seat outlet interface 942, and due to upper matching seat air inlet Interface 932 and lower matching seat outlet interface 942 are connected in series on muffler 10b pipeline, thus air intake duct 482 is substantial It is connected with muffler 10b.

As shown in Figure 5, expand in the foregoing upper end for stating connecting rod 43 and be provided with a discoidal connecting rod fixed seat 431, the connecting rod is consolidated Reservation 431 corresponds to the lower section of the central part of foregoing valve film 45, and is provided with the top of valve film 45 a valve mould plate 451, the valve mould plate 451 is corresponding with connecting rod fixed seat 431 and passes through valve mould plate bolt 4511 and connecting rod fixed seat 431 Fixed, being constituted in the lower end of connecting rod 43 has a bearing hole 432, and a bearing 4321, the bearing are provided with the bearing hole 432 4321 center has an eccentric disk shaft mating holes 43211, the eccentric disk shaft mating holes 43211 and foregoing eccentric disk shaft 421 It is engaged.

Preferably, in the distal end faces of foregoing eccentric disk shaft 421（On the right-hand member end face of location status shown in Fig. 5）Open Provided with a back-up ring screw hole 4211, one is fixed with by back-up ring screw 42111 in the position corresponding to the back-up ring screw hole 4211 For stopping and using the back-up ring 42112 for avoiding connecting rod 43 from shaking off from eccentric disk shaft 421 to foregoing connecting rod 43.

The structure of septa described above pump 4 is relative to prior art（Such as CN2799901Y and CN203925958U）By It is significantly simple in structure, thus objectively embody the relevant art effect described in the superincumbent technique effect column of applicant.

When motor 41 works, eccentric disc 42 is driven by motor shaft 411, the eccentric disk shaft 421 on eccentric disc 42 drives Connecting rod 43 moves up and down, and because the upper end of connecting rod 43 is fixedly connected with the middle position of valve film 45, thus makes valve film by connecting rod 43 45 middle section（The part corresponding with connecting rod fixed seat 431）Make the mode upwards with downward alternating movement to move.At this During, motion then shows as exhaust to valve film 45 upwards, i.e., be vented by pump housing blast pipe 483, and the air-breathing of pump housing air intake duct 482, When pump housing blast pipe 483 is vented, the opening that foregoing exhaust valve plate 472 is in the accent to being vented tube chamber 4831 is place In the state opened to valve plate steam vent 462, and suction valve chip 471 is in the closure to the accent of aspiration lumen 4821（Closing） State is to be in the state closed to valve plate suction hole 461, and when pump housing blast pipe 483 is vented, pump housing accommodating chamber 441, The gas channel of valve plate steam vent 462, exhaust valve plate 472 and exhaust tube chamber 4831 is communicated, and pump housing accommodating chamber 441, valve plate The gas channel of suction hole 461, suction valve chip 471 and aspiration lumen 4821 is not communicated with, because suction valve chip 471 is in valve The sealed condition of plate suction hole 461, otherwise same example.The action of the present invention is so realized with the alternate state of inspiratory phase to exhale, By taking air-breathing as an example, the dust laden air of Work places is able to introduce pipe 10a introducing signal receptions through dust laden air by dust sampling head 2 The receiver inlet suction port 54 of the structural system of mechanism 5, and the receiver seat light hole 511 of entering signal receiver seat 51 Interior, dust is then intercepted by the filter disc 72 of dust catching device 7, and the transmitter seat light hole of air then entering signal transmitter seat 61 611, then emitted device return-air joint 63 and the air-breathing for entering pump housing air intake duct 482 by way of pressure differential detection mechanism 9 by muffler 10b Tube chamber 4821, and then by way of the suction valve chip 471 in opening（Exhaust valve plate 472 now is closed）, valve Plate suction hole 461 enters pump housing accommodating chamber 441.Then when pump housing blast pipe 483 is vented, then air just holds from the pump housing successively Receive chamber 441, valve plate steam vent 462, the exhaust valve plate 472 in opening（Now suction valve chip 471 is closed）, Until being discharged by pump housing blast pipe 483.

When filter disc 72（Generally use filter paper）On dust when building up, although the light quantity that light source part 62 is launched is permanent Fixed, but make the infrared light signal that silicon optical sensor 53 is received because filter disc 72 is blocked by dust（Because light source part 62 For infrared light emission pipe）Change, thus by signal processing mechanism 3 data processing circuit plate 31 through conversion and will be definite Value is that the dust concentration numerical value that swims in air is shown on data display screen 32.

In summary, the technical scheme that the present invention is provided comprehensively compensate for the deficiency in prior art, favorably accomplish Invention task, it is objective and faithfully embody all technique effects sketched in the superincumbent technique effect column of applicant, no Lose to be a ultimate attainment technical scheme.

Claims (8)

1. a kind of direct-reading dust concentration detector with pressure differential detection function, including constitute the housing for having shell chamber (11) (1)；One dust sampling head (2), the dust sampling head (2) is fixed on the wall body of the housing (1)；One signal processing mechanism (3), the signal processing mechanism (3) is arranged in the shell chamber (11)；One membrane pump (4), the membrane pump (4) is arranged on the shell It is electrically connected in chamber (11) and with the signal processing mechanism (3)；One signal receiving structure (5) and a signal transmitter structure (6), the signal receiving structure (5) and signal transmitter structure (6) are cooperated with self corresponding state and are arranged on institute It is electrically connected in the shell chamber (11) stated and with the signal processing mechanism (3)；One dust catching device (7), the dust catching Device (7) is plugged between the signal receiving structure (5) and signal transmitter structure (6) in a state of use；One is described for making The signal receiver seat governor motion (8) of signal receiving structure (5) displacement up or down, signal receiver seat governor motion (8) it is arranged in the position of the top corresponding to signal receiving structure (5) in the shell chamber (11) and and signal receiving structure (5) connect；Wherein：A use is fixed with described housing (1) and in the position of the accent corresponding to the shell chamber (11) The cap (12) of shield is covered in the accent to shell chamber (11), and an installing plate (111), described barrier film are fixed with shell chamber (11) Pump (4), signal receiving structure (5) and signal transmitter structure (6) are arranged at the installing plate (111) towards the cap (12) Side, and the position of signal receiving structure (5) and signal transmitter structure (6) on installing plate (111) be located at installing plate (111) left side, and position of the membrane pump (4) on installing plate (111) is located at the right side of installing plate (111), described signal Receiver seat governor motion (8) is supported on side of the installing plate (111) towards cap (12), described signal processing mechanism (3) Position in the shell chamber (11) is located at the upper left side of shell chamber (11), it is characterised in that also include a pressure differential detection mechanism (9), the pressure differential detection mechanism (9) is arranged on the installing plate (111) court in the position of the top corresponding to the membrane pump (4) To the side of the cap (12), described dust sampling head (2) introduces pipe (10a) by dust laden air and connect with described signal Mechanism (5) connection is received, described membrane pump (4) is connected by muffler (10b) with described signal transmitter structure (6), described Pressure differential detection mechanism (9) include upper bearing support (91), lower supporting frame (92), upper matching seat (93), lower matching seat (94) and every Piece (95), upper bearing support (91) is fixed on the installing plate by upper bearing support fixing screws (911) with horizontal boom state (111) towards the side of the cap (12), lower supporting frame (92) is same in the position of the lower section corresponding to upper bearing support (91) Side of the installing plate (111) towards cap (12) is fixed on by lower supporting frame fixing screws (921) with horizontal boom state, and And be equipped between upper and lower bearing support (91,92) one be used for by upper and lower bearing support (91,92) away from installing plate (111) one The bearing support attachment screw (96) linked together is held, upper and lower matching seat (93,94) is set with the mated condition faced each other Between upper and lower bearing support (91,92), and constituted in upper matching seat (93) towards the side of lower matching seat (94) and have and match somebody with somebody on one Joint chair chamber (931), and matching seat intake interface (932) on one is extended with the middle position on the top of upper matching seat (93), should Upper matching seat intake interface (932) is communicated with upper matching seat chamber (931), and matching seat intake interface (932) is stretched on this The top of upper bearing support (91), matching seat outlet interface (933) on one is extended with the sidepiece of upper matching seat (93), mating on this Seat outlet interface (933) is communicated with upper matching seat chamber (931), and is connected with one on matching seat outlet interface (933) on this One end of upper matching seat pneumatic tube (9331), other end of matching seat pneumatic tube (9331) is towards the signal processing mechanism on this (3) direction extends and is connected with a first pressure sensor (93311), and the first pressure force snesor (93311) is set It is electrically connected on signal processing mechanism (3) and with signal processing mechanism (3), in lower matching seat (94) towards upper matching seat (93) side, which is constituted, matching seat chamber (941), and the lower matching seat chamber (941) is relative with the upper matching seat chamber (931) Should, matching seat outlet interface (942) are extended with the middle position of the bottom of lower matching seat (94), the lower matching seat outlet Interface (942) is communicated with lower matching seat chamber (941), and the lower matching seat outlet interface (942) is stretched over lower supporting frame (92) Lower section, sidepiece in lower matching seat (94) and the extension of the position in the lower section corresponding to upper matching seat outlet interface (933) There is matching seat ventilation interface (943), the lower matching seat ventilation interface (943) communicates with lower matching seat chamber (941), and One end of matching seat pneumatic tube (9431), the lower matching seat pneumatic tube are connected with the lower matching seat ventilation interface (943) (9431) the other end extends towards the direction of the signal processing mechanism (3) and is connected with a second pressure sensor (94311), the second pressure sensor (94311) is arranged on signal processing mechanism (3) and electric with signal processing mechanism (3) Gas is connected, and partition (95) is in the shape of semicircle valve body, the partition (95) and be arranged on by the upper and lower matching seat chamber (931, 941) after cooperating in the chamber that is collectively forming, by the partition (95) while by the upper matching seat intake interface (932) A part for the passway communicated with upper matching seat chamber (931) and by the lower matching seat outlet interface (942) and lower mating A part for the passway that seat chamber (941) is communicated is blocked, described upper matching seat intake interface (932) and lower matching seat outlet Interface (942) is connected in series on the muffler (10b) pipeline；The bottom of the housing (1) middle position and The side of the shell chamber (11) is provided with a tripod connecting plate (18), one is offered on the tripod connecting plate (18) For the tripod connecting plate fixing hole for fixing tripod connecting plate (18) and temporary support in the tripod on terrace, in institute Opened on the installing plate (111) stated and corresponding to the position between the signal receiving structure (5) and signal transmitter structure (6) It is used to supply the dust catching device (7) to be inserted into the installation between signal receiving structure (5) and signal transmitter structure (6) provided with one Plate resigning hole (1111), is offered on the rear wall body of housing (1) and in the position corresponding to installing plate resigning hole (1111) One shape and size and installing plate resigning hole (1111) identical housing rear resigning hole (13), described dust catching device (7) signal receiver is inserted afterwards by way of housing rear resigning hole (13) and installing plate resigning hole (1111) successively in a state of use Between structure (5) and signal transmitter structure (6)；Described dust sampling head (2) is arranged on the right wall body of housing (1), described It is submissive flexible pipe that dust laden air, which introduces pipe (10a) and muffler (10b),；Described signal receiving structure (5) includes letter Number receiver seat (51), gland (52), silicon optical sensor (53) and receiver inlet suction port (54), in signal receiver (51) Short transverse bottom and centrally located composition have a receiver seat light hole (511), and signal receiver seat (51) a receiver seat air admission hole communicated with receiver seat light hole (511) is offered towards the side of the cap (12) (512), gland (52) is fixed on the top of signal receiver seat (51), and offers one in the middle position of the gland (52) For the screw rod lifting hole(eyelet) (521) being engaged for described signal receiver seat governor motion (8), silicon optical sensor (53) is in correspondence It is arranged in the position of the top in receiver seat light hole (511) on silicon optical sensor stator (532), and the silicon light is passed Sensor stator (532), which is arranged on, to be formed in the fixation piece chamber (513) on the top of the short transverse of signal receiver seat (51), And the silicon optical sensor lead-out wire (531) of silicon optical sensor (53) is electrically connected with the signal processing mechanism (3), receiver Inlet suction port (54) is fixed on signal receiver seat (51) in the position corresponding to receiver seat air admission hole (512), and with Described receiver seat light hole (511) is communicated；Described signal transmitter structure (6) includes signal projector seat (61), light source Part (62) and transmitter return-air joint (63), signal projector seat (61) is towards the side of the installing plate (111) and installation Plate (111) is fixed, and being constituted in the middle position of the short transverse of signal projector seat (61) has transmitter seat light hole (611), transmitter seat light hole (611) is corresponding with described receiver seat light hole (511), and in signal projector seat (61) a transmitter seat return-air hole communicated with transmitter seat light hole (611) is offered towards the side of the cap (12) (612), light source part (62) is arranged on light source part fixed seat in the position of the bottom corresponding to transmitter seat light hole (611) (622) on, and it is electrically connected by light source part circuit (621) and the signal processing mechanism (3), the light source part is fixed Seat (622) is fixed on the bottom of signal projector seat (61), and transmitter return-air joint (63) is corresponding to transmitter seat return-air hole (612) position is fixed on signal projector seat (61), and is communicated with described transmitter seat light hole (611)；It is described Dust sampling head (2) lean out the right wall body of the housing (1) back to the side of the shell chamber (11)；Described dust laden air draws Enter pipe (10a) to be connected with described receiver inlet suction port (54), and described muffler (10b) and described transmitter return-air Joint (63) is connected；The signal processing mechanism (3) includes a data processing circuit plate (31) and a data display screen (32), number The rear wall body of the housing (1) is fixed on towards the side of the shell chamber (11), data display screen according to process circuit plate (31) (32) cap (12) is arranged on back to the side of the shell chamber (11) and is electrically connected with data processing circuit plate (31), Described silicon optical sensor lead-out wire (531), light source part circuit (621), membrane pump (4), first pressure sensor (93311) And second pressure sensor (94311) is electrically connected with the data processing circuit plate (31)；Described signal receiver Seat governor motion (8) is connected in the position corresponding to described screw rod lifting hole(eyelet) (521) with the gland (52), described membrane pump (4) motor (41), eccentric disc (42), connecting rod (43), pump seat (44), valve film (45), valve plate (46), valve sheet (47), pump are included Body (48) and pump seat lid (49), motor (41) are electrically connected with the data processing circuit plate (31) and fixed with horizontally-arranged state On motor cabinet (412), and side of the motor cabinet (412) with pump seat (44) under is fixed, the motor shaft (411) of motor (41) It is rotatably supported at through motor cabinet (412) and by motor axle bearing (4111) on motor cabinet (412), eccentric disc (42) is solid It is scheduled on motor shaft (411), and an eccentric disk shaft (421) is fixed with the side of eccentric disc (42) towards the connecting rod (43), The side of pump seat (44) and the installing plate (111) towards the cap (12) is fixed, and the pump seat (44), which is constituted, pump housing appearance Receive chamber (441), valve film (45) is arranged in pump housing accommodating chamber (441) and positioned at the bottom of pump housing accommodating chamber (441), connecting rod (43) upper end is fixedly connected with the central part of valve film (45), and the lower end of connecting rod (43) connects with the eccentric disk shaft (421) Connect, the lower containment of the pump housing (48) is in the pump housing accommodating chamber (441), the bottom surface of the pump housing (48) and the circumference of valve film (45) The side of edge contact and the pump housing (48) under in direction, which is constituted, a valve plate accommodating chamber (481), and in pump Body (48) is constituted towards upper side a pump housing air intake duct (482) and a pump housing blast pipe (483), the pump housing air intake duct (482) communicated with pump housing blast pipe (483) with valve plate accommodating chamber (481), valve plate (46) is arranged in valve plate accommodating chamber (481) And it is fixed with the pump housing (48), one is offered on the valve plate (46) from the upside insertion of the thickness direction of valve plate (46) to downside Valve plate suction hole (461) and a valve plate steam vent (462), the air intake duct of valve plate suction hole (461) and pump housing air intake duct (482) Chamber (4821) is corresponding, and valve plate steam vent (462) is corresponding with the exhaust tube chamber (4831) of pump housing blast pipe (483), valve Piece (47) is arranged in valve plate accommodating chamber (481) and is shelved on the top of valve plate (46), is provided with the valve sheet (47) One suction valve chip (471) and an exhaust valve plate (472), suction valve chip (471) are corresponding with described valve plate suction hole (461), And exhaust valve plate (472) is corresponding with described valve plate steam vent (462), and when suction valve chip (471) is in the valve During the state of plate suction hole (461) closure, the exhaust valve plate (472) is in the state opened to valve plate steam vent (462), and When suction valve chip (471) is in the state opened to valve plate suction hole (461), exhaust valve plate (472) is in be vented to valve plate The state of hole (462) closing, pump seat lid (49) the top corresponding to the pump housing (48) position and pump seat (44) towards upper one Side is fixed, and offers in the middle position of the pump seat lid (49) pump housing resigning hole (491), the top of the pump housing (48) Lean out described pump housing accommodating chamber (441) in the position corresponding to pump housing resigning hole (491), described exhaust tube chamber (4831) Top is communicated with the shell chamber (11), and the air intake duct (482) is connected with the muffler (10b).

2. the direct-reading dust concentration detector according to claim 1 with pressure differential detection function, it is characterised in that institute The dust catching device (7) stated includes a purpose filter leaf clip (71) and a filter disc (72), and one end of purpose filter leaf clip (71) is successively by way of described The signal projector seat (51) is corresponded to after housing rear resigning hole (13) and installing plate resigning hole (1111) to receive with signal Between device seat (61), and purpose filter leaf clip through hole (711) is offered in one end of the purpose filter leaf clip (71), the purpose filter leaf clip through hole (711) Corresponding between receiver seat light hole (511) and transmitter seat light hole (611), the other end of purpose filter leaf clip (71) is located at The shell chamber (11) outside, seize on both sides by the arms on purpose filter leaf clip (71) by filter disc (72), and the filter disc (72) is in the position of purpose filter leaf clip through hole (711) Put and communicated simultaneously with receiver seat light hole (511) and transmitter seat light hole (611)；In signal receiver seat (51) The circumferencial direction in the aperture towards the side of signal projector seat (61) and around receiver seat light hole (511) The receiver seat seal groove (515) of a surface for being depressed in signal receiver seat (51) and insertion is offered, in the reception Receiver seat sealing ring (5151) is embedded with device seat seal groove (515)；In described signal projector seat (61) direction The side of signal receiver seat (51) and the circumferencial direction in aperture around transmitter seat light hole (611) offers one It is depressed in the surface of signal projector seat (61) and the transmitter seat seal groove (614) of insertion, transmitter seat sealing ring Groove (614) is corresponding with receiver seat seal groove (515), and is embedded with transmitter seat sealing ring (6141), the transmitting Device seat sealing ring (6141) is corresponding with receiver seat sealing ring (5151), and when to signal receiver seat governor motion (8) operate and make signal receiver seat (51) come downwards to signal projector seat (61) be in contact state when, described reception Device seat sealing ring (5151) is engaged with described transmitter seat sealing ring (6141) and used to receiver seat light hole (511) position that borders on the edge in transmitter seat light hole (611) is sealed；In signal projector seat (61) direction The side of signal receiver seat (51) and constituted in the position corresponding to the installing plate resigning hole (1111) and have filter disc Slot (615) is pressed from both sides, one end of described purpose filter leaf clip (71) is matched somebody with somebody together with described filter disc (72) with the purpose filter leaf clip slot (615) plug Close.

3. the direct-reading dust concentration detector according to claim 1 with pressure differential detection function, it is characterised in that The side of described signal receiver seat (51) towards signal projector seat (61) offers at least one pair of transmitter seat and led Post holes (514), and in signal projector seat (61) towards the side of signal receiver seat (51) and corresponding to a pair of transmittings The position of device seat guide pillar hole (514) is extended with a pair of transmitters seat guide pillars (613), this pair of transmitter seat guide pillar (613) with a pair Transmitter seat guide pillar hole (514) is slidably matched.

4. the direct-reading dust concentration detector according to claim 1 with pressure differential detection function, it is characterised in that institute The signal receiver seat bindiny mechanism (8) stated includes nutplate (81), bolt and nut (82), screw rod (83), spring (84) and rotation Button (85), nutplate (81) is fixed on side of the installing plate (111) towards the cap (12) with the state of horizontal boom And corresponding to the top of signal receiver seat (51), bolt and nut (82) is corresponding to the screw rod lifting hole(eyelet) (521) The position of top is arranged in nutplate (81), and middle part and bolt and nut (82) screw thread of screw rod (83) coordinate, screw rod (83) Upper end is stretched over the shell chamber (11) outside through the roof body of the housing (1), and the lower end of screw rod (83) is by way of screw rod lifting hole(eyelet) (521) lower section of the gland (52) is stretched over, and has a jump-ring slot (831) in the lower end composition of the screw rod (83), at this A jump ring (832) for being used to make screw rod (83) be connected with gland (52) is provided with jump-ring slot (831), spring (84) is nested with spiral shell The lower end of bar (83), and the upper end of the spring (84) is supported on nutplate (81) towards the side of signal receiver seat (51), And the lower end of spring (84) is supported on jump ring (832), knob (85) is fixed on the upper end of screw rod (83).

5. the direct-reading dust concentration detector according to claim 4 with pressure differential detection function, it is characterised in that A screw hole (14), the spiral shell are offered on the roof body of the housing (1) and in the position corresponding to the screw rod (83) The upper end of bar (83) is stretched over the shell chamber (11) outside by way of screw hole (14), on the roof body of housing (1) and back to shell The side of chamber (11) is provided with a handle (15).

6. the direct-reading dust concentration detector according to claim 1 with pressure differential detection function, it is characterised in that The upper end of the connecting rod (43), which is expanded, is provided with a discoidal connecting rod fixed seat (431), and the connecting rod fixed seat (431) corresponds to described The lower section of the central part of valve film (45), and it is provided with the top of valve film (45) a valve mould plate (451), the valve mould plate (451) corresponding with connecting rod fixed seat (431) and fixed with connecting rod fixed seat (431), being constituted in the lower end of connecting rod (43) has One bearing hole (432), a bearing (4321) is provided with the bearing hole (432), and the center of the bearing (4321) is inclined with one Cartridge axle mating holes (43211), the eccentric disk shaft mating holes (43211) is engaged with described eccentric disk shaft (421).

7. the direct-reading dust concentration detector according to claim 6 with pressure differential detection function, it is characterised in that A back-up ring screw hole (4211) is offered in the distal end faces of described eccentric disk shaft (421), corresponding to the back-up ring screw hole (4211) position is fixed with one by back-up ring screw (42111) to be used to the connecting rod (43) stop is used and avoids connecting rod (43) back-up ring (42112) shaken off from eccentric disk shaft (421).

8. the direct-reading dust concentration detector according to claim 1 with pressure differential detection function, it is characterised in that institute Partition (95) is stated while one of the passway that the upper matching seat intake interface (932) is communicated with upper matching seat chamber (931) Point and the part of passway that communicates the lower matching seat outlet interface (942) with lower matching seat chamber (941) block Coverage extent is 1/2nd or 2/5ths of the diameter of the passway.