CN204495688U - There is the direct-reading dust concentration detector of pressure differential detection function - Google Patents

Abstract

There is a direct-reading dust concentration detector for pressure differential detection function, belong to Environmental Safety facility technology field.Comprise housing; Dust sampling head, is located on housing; Signal processing mechanism, is located in shell chamber; Membrane pump, is located in shell chamber; Signal receiving structure and signal transmitter structure, the state of self correspondence coordinates and is located in shell chamber; Dust catching device, is plugged between signal receiving structure and signal transmitter structure; Signal receiver seat governor motion, is located in shell chamber; Housing fixes cap, shell chamber internal fixtion installing plate, feature: also comprise pressure differential detection mechanism, be located at the side of installing plate towards cap, dust sampling head is connected with signal receiving structure, membrane pump is connected with signal transmitter structure, and pressure differential detection mechanism comprises upper and lower bearing support, upper and lower matching seat and partition.Ensure that signal receiving structure receives the real light signal from light source part; Ensure accuracy of detection; People is avoided to guide and support rocking of occurring; Structure is simple and volume is little.

Description

There is the direct-reading dust concentration detector of pressure differential detection function

Technical field

The utility model belongs to Environmental Safety facility technology field, is specifically related to a kind of direct-reading dust concentration detector with pressure differential detection function.

Background technology

Those are easily produced in production operation process to the industry of dust; such as colliery, manufacture of cement industry, moulding compound industry, electronic powder materials industry, textile industry, food-processing industry (flour mill) and chemical and medicine industry industry etc.; usually need to rely on dust concentration detector to be monitored the dust concentration of swimming in the air of Work places; to take corresponding Disposal Measures; protection occupational population is healthy on the one hand, prevents from setting off an explosion because dust concentration exceeds standard on the other hand.Exploded by the Mine Dust of media report in the past, flour mill exploded, numb cotton mill explodes, metal product plant polishing departement explodes, and (as especially big aluminum dust explosion accident that Jiangsu Province, China city of Kunshan Zhong Rong metallic article company limited occurs) etc. was all tending towards saturated because of the dust concentration of swimming in air and met caused by electrostatic or naked light.In addition, the occupational illness of the worker of above-mentioned industry is as also general because of caused by the long-term dust by Work places encroaches in silicosis.Along with people to carrying out production strictly in line with rules and regulations, the significantly improving of cleaning operation and safe construction and people-based concept, the system of operation field being carried out to dust monitoring is not only formulated for being not limited to the aforementioned industry exemplified, and for operation field or claim the workman in a line post to be equipped with the dust concentration pick-up unit of various version (as being similar to the sampling head of CN2800261Y structure) or corresponding instrument (as being similar to the Bidirectional diaphragm pump of CN2799901Y structure), this is comparatively general in colliery.In addition, the supervision instrument of dust concentration detector Ye Shi environmental administration, safety supervision department etc.

Complete direct-reading dust concentration detector is made up of signal transmitter structure, signal receiving structure, signal processing mechanism, dust sampling head and membrane pump (also claiming extraction sector) etc. usually, and can be seen in disclosed Chinese patent literature, typically as invention patent mandate notification number CN102221519B recommends there be " direct-reading dust concentration detector " (this patent is proposed by the applicant).More typical as invention patent mandate notification number CN102419296B recommend have " direct-reading dust concentration measuring instrument ", in the instructions 0003-0004 section of this CN102419296B, the shortcoming that CN101603912B exists is evaluated, and be provided with a governor motion between signal receiving structure (patent claims signal receiver seat) and signal transmitter structure (patent claims signal projector seat), by this governor motion to signal receiving structure and signal transmitter structure namely to the distance between signal receiver seat and signal projector seat according to needing to regulate (specifically can see the 0007 to 0010 section, the instructions of this patent).

But by finding that it exists following shortcoming to the instructions reading in full of aforementioned CN102419296B: one, while pointing out the deficiency of CN101603912B, follow the mentality of designing of CN101603912B due to it and dust laden air be introduced into center pit and the transmitter seat light hole (patent claims the first center pit) of the signal projector seat of signal transmitter structure, thus a part of dust originally should tackled by dust catching device can be made in the use procedure of reality naturally to fall so accumulate in as signal transmitter structure structural system and on the light source part being positioned at the bottom in transmitter seat light hole and light-emitting tube, have an impact to detection next time, because upper once detect time, owing to light source part having been covered by dust or has been infected with by dust, the signal that signal receiving structure receives not is actual signal, the data distortion also shown on a display screen after causing signal processing mechanism process.Current disposal way is: regularly or carry out wiping to light source part aperiodically and use and guarantee that it cleans, but not only very easily undermines fragile light source part, and increases extra operation burden to user; They are two years old, owing to lacking the rational in infrastructure measure predicting air mass flow change, thus the accuracy ensureing test result is difficult to, because the inlet, outlet joint of signal receiving structure and signal transmitter structure is all and must be connected with membrane pump (patent claims air extractor) and sampling head respectively by pipeline, and fluctuating appears in air unavoidably that flow through in the pipeline that is connected with membrane pump, so the air mass flow under the state of airwaves in the unit interval is not constant, the dust concentration of swimming in the air in the unit interval can not get true reflection.Specifically, only make the flow in the unit interval of the dust laden air introduced from dust sampling head remain on metastable state, direct-reading dust concentration detector accuracy of detection to the dust concentration of swimming in environment in official hour could be ensured.

For above-mentioned prior art situation, be necessary rational modification in addition, the applicant has done positive and useful design and have passed through the simulation test (taking under secrecy provision) of non-limited number of times for this reason, finally defines technical scheme described below.

Summary of the invention

Task of the present utility model be to provide a kind of help avoid light source part that the dust tackled by dust catching device in the dust concentration testing process of swimming in the air of operation field drops to signal transmitter structure naturally uses ensure that signal receiving structure is received actual signal and reflects True Data by signal processing mechanism, be conducive to making being connected to membrane pump and signal transmitter structure and the air be connected in the pipeline between signal receiving structure and dust sampling head is in good steady flow condition and uses and accurately detects the dust that swims in air, there is the structure the terrace being convenient to be arranged at detected place statically with temporary support fixed form using and avoids occurring in testing process rocking and be of value to and significantly simplify pressure differential detection mechanism and remarkable reduced volume and use convenient processing and install and the direct-reading dust concentration detector with pressure differential detection function be serially connected with easily on pipeline.

Task of the present utility model has been come like this, a kind of direct-reading dust concentration detector with pressure differential detection function, comprises the housing being configured with shell chamber, one dust sampling head, this dust sampling head is fixed on the wall body of described housing, one signal processing mechanism, this signal processing mechanism is arranged in described shell chamber, one membrane pump, this membrane pump to be arranged in described shell chamber and to be electrically connected with described signal processing mechanism, one signal receiving structure and a signal transmitter structure, this signal receiving structure and signal transmitter structure cooperatively interact with the state of self correspondence and to be arranged in described shell chamber and to be all electrically connected with described signal processing mechanism, one dust catching device, this dust catching device is plugged between described signal receiving structure and signal transmitter structure in a state of use, one for making the signal receiver seat governor motion of described signal receiving structure displacement up or down, and this signal receiver seat governor motion is corresponding to the position above signal receiving structure and to be arranged in described shell chamber and be connected with signal receiving structure, wherein: on described housing, be fixed with one for covering the cap protected to the accent in shell chamber in the position of accent corresponding to described shell chamber, and have an installing plate at shell chamber internal fixtion, described membrane pump, signal receiving structure and signal transmitter structure are all arranged on the side of described installing plate towards described cap, and signal receiving structure and signal transmitter structure position are on a mounting board positioned at the left side of installing plate, and membrane pump position is on a mounting board positioned at the right side of installing plate, described signal receiver seat governor motion is supported on the side of installing plate towards cap, the position of described signal processing mechanism in described shell chamber is positioned at the upper left side in shell chamber, characterized by further comprising a pressure differential detection mechanism, this pressure differential detection mechanism is being arranged on the side of described installing plate towards described cap corresponding to the position above described membrane pump, described dust sampling head is connected with described signal receiving structure by dust laden air inlet tube, described membrane pump is connected with described signal transmitter structure by muffler, described pressure differential detection mechanism comprises bearing support, lower supporting frame, upper matching seat, lower matching seat and partition, upper bearing support is fixed on the side of described installing plate towards described cap by upper bearing support gib screw with horizontal boom state, the position of lower supporting frame below of bearing support on corresponding to is fixed on the side of installing plate towards cap with horizontal boom state by lower supporting frame gib screw equally, and upper, be equipped between lower supporting frame one for by, the bearing support attachment screw that lower supporting frame links together away from one end of installing plate, on, lower matching seat is arranged on the mated condition faced each other, between lower supporting frame, and be configured with matching seat chamber at upper matching seat towards the side of lower matching seat, and be extended with matching seat intake interface at the middle position on the top of upper matching seat, on this, matching seat intake interface communicates with upper matching seat chamber, and matching seat intake interface is stretched over the top of bearing support on this, be extended with matching seat at the sidepiece of upper matching seat to give vent to anger interface, on this, matching seat interface of giving vent to anger communicates with upper matching seat chamber, and matching seat is given vent to anger and interface is connected with one end of matching seat pneumatic tube on this, on this matching seat pneumatic tube the other end towards described signal processing mechanism direction extend and be connected with one first pressure transducer, this the first compressive force sensor setting is on signal processing mechanism and be electrically connected with signal processing mechanism, lower matching seat towards on the side of matching seat be configured with matching seat chamber, this lower matching seat chamber is corresponding with described upper matching seat chamber, be extended with matching seat at the middle position of the bottom of lower matching seat to give vent to anger interface, this lower matching seat interface of giving vent to anger communicates with lower matching seat chamber, and this lower matching seat is given vent to anger, interface is stretched over the below of lower supporting frame, lower matching seat sidepiece and on corresponding to the give vent to anger position of below of interface of matching seat be extended with the interface of matching seat ventilation, this lower matching seat ventilation interface communicates with lower matching seat chamber, and on this lower matching seat ventilation interface, be connected with one end of matching seat pneumatic tube, the other end of this lower matching seat pneumatic tube extends towards the direction of described signal processing mechanism and is connected with one second pressure transducer, this second pressure transducer to be arranged on signal processing mechanism and to be electrically connected with signal processing mechanism, partition is the shape of semicircle lobe body, this partition be arranged on by described, after lower matching seat chamber cooperatively interacts in the common chamber formed, a part for the passway that a part for the passway simultaneously communicated with upper matching seat chamber by described upper matching seat intake interface by this partition and interface of being given vent to anger by described lower matching seat communicate with lower matching seat chamber is blocked, described upper matching seat intake interface and lower matching seat interface tandem of giving vent to anger is connected on the pipeline of described muffler, in the middle position of the bottom of described housing and the side back to described shell chamber is provided with a tripod web joint, this tripod web joint offers one for the fixing tripod web joint fixed orifice of the tripod on terrace by tripod web joint and temporary support.

In a specific embodiment of the present utility model, one is being offered for being inserted into the installing plate resigning hole between signal receiving structure and signal transmitter structure for described dust catching device on described installing plate and corresponding to position between described signal receiving structure and signal transmitter structure, a shape and the size housing rear resigning hole identical with installing plate resigning hole is offered on the rear wall body of housing and corresponding to the position of installing plate resigning hole, described dust catching device inserts between signal receiving structure and signal transmitter structure in a state of use successively after housing rear resigning hole and installing plate resigning hole, described dust sampling head is arranged on the right wall body of housing, and described dust laden air inlet tube and muffler are submissive flexible pipe, described signal receiving structure comprises signal receiver seat, gland, silicon optical sensor and receiver inlet suction port, be positioned at middle position be configured with a receiver seat light hole in the bottom of the short transverse of signal receiver seat, and offer a receiver seat air admission hole communicated with receiver seat light hole at signal receiver seat towards the side of described cap, gland is fixed on the top of signal receiver seat, and offer a screw rod lifting hole(eyelet) matched for the described signal receiver seat governor motion of confession at the middle position of this gland, silicon optical sensor is being arranged on silicon optical sensor stator corresponding to the position above described receiver seat light hole, and this silicon optical sensor stator is arranged in the stator chamber on the top of the short transverse being formed in signal receiver seat, and the silicon optical sensor extension line of silicon optical sensor and described signal processing mechanism are electrically connected, the position that receiver inlet suction port is corresponding to receiver seat air admission hole is fixed on signal receiver seat, and communicate with described receiver seat light hole, described signal transmitter structure comprises signal projector seat, light source part and transmitter return-air joint, signal projector seat is fixed towards the side of described installing plate and installing plate, a transmitter seat light hole is configured with in the middle position of the short transverse of this signal projector seat, this transmitter seat light hole is corresponding with described receiver seat light hole, and offer a transmitter seat return-air hole communicated with transmitter seat light hole at signal projector seat towards the side of described cap, light source part is arranged on light source part holder in the position of the bottom corresponding to transmitter seat light hole, and be electrically connected by light source part circuit and described signal processing mechanism, described light source part holder is fixed on the bottom of signal projector seat, the position that transmitter return-air joint is corresponding to transmitter seat return-air hole is fixed on signal projector seat, and communicate with described transmitter seat light hole, described dust sampling head leans out the side of right wall body back to described shell chamber of described housing, described dust laden air inlet tube is connected with described receiver inlet suction port, and described muffler is connected with described transmitter return-air joint, described signal processing mechanism comprises a data processing circuit plate and a data display screen, data processing circuit plate is fixed on the side of rear wall body towards described shell chamber of described housing, data display screen is arranged on described cap back to the side in described shell chamber and is electrically connected with data processing circuit plate, and described silicon optical sensor extension line, light source part circuit, membrane pump, the first pressure transducer and the second pressure transducer be all electrically connected with described data processing circuit plate, the position that described signal receiver seat governor motion is corresponding to described screw rod lifting hole(eyelet) is connected with described gland.

In another specific embodiment of the present utility model, described dust catching device comprises a purpose filter leaf clip and a filter disc, one end of purpose filter leaf clip is corresponding between described signal projector seat and signal receiver seat successively after described housing rear resigning hole and installing plate resigning hole, and offer purpose filter leaf clip through hole in one end of this purpose filter leaf clip, this purpose filter leaf clip through hole corresponds between described receiver seat light hole and transmitter seat light hole, the other end of purpose filter leaf clip is positioned at outside described shell chamber, filter disc is seized on both sides by the arms on purpose filter leaf clip, and this filter disc communicates with receiver seat light hole and transmitter seat light hole in the position of purpose filter leaf clip through hole simultaneously, to offer one towards the side of described signal projector seat and around the circumferencial direction in the aperture in described receiver seat light hole at described signal receiver seat and be depressed in the surface of signal receiver seat and through receiver seat seal groove, in this receiver seat seal groove, be embedded with a receiver seat O-ring seal, to offer one towards the side of signal receiver seat and around the circumferencial direction in the aperture in described transmitter seat light hole at described signal projector seat and be depressed in the surface of signal projector seat and through transmitter seat seal groove, this transmitter seat seal groove is corresponding with receiver seat seal groove, and be embedded with a transmitter seat O-ring seal, this transmitter seat O-ring seal is corresponding with receiver seat O-ring seal, and when making signal receiver seat come downwards to the state contacted with signal projector seat to described signal receiver seat governor motion operation, described receiver seat O-ring seal matches with described transmitter seat O-ring seal and uses and seals the position that borders on of the edge in described receiver seat light hole and transmitter seat light hole, be configured with purpose filter leaf clip slot at described signal projector seat towards the side of described signal receiver seat and corresponding to the position of described installing plate resigning hole, one end of described purpose filter leaf clip to plug with this purpose filter leaf clip slot together with described filter disc and coordinates.

In another specific embodiment of the present utility model, at least one pair of transmitter seat guide pillar hole is offered towards the side of described signal projector seat at described signal receiver seat, and being extended with a pair transmitter seat guide pillar at signal projector seat towards the side of signal receiver seat and in the position corresponding to a pair transmitter seat guide pillar hole, this is slidably matched to transmitter seat guide pillar and a pair transmitter seat guide pillar hole.

In another specific embodiment of the present utility model, described signal receiver seat bindiny mechanism comprises nutplate, bolt and nut, screw rod, spring and knob, nutplate is fixed on described installing plate towards the side of described cap with the state of horizontal boom and corresponds to the top of described signal receiver seat, bolt and nut is being arranged in nutplate corresponding to the position above described screw rod lifting hole(eyelet), the middle part of screw rod and bolt and nut threaded engagement, the upper end of screw rod is stretched over outside described shell chamber through the roof body of described housing, and the lower end of screw rod is stretched over the below of described gland by way of screw rod lifting hole(eyelet), and be configured with a jump-ring slot in the lower end of this screw rod, this jump-ring slot is provided with a jump ring for making screw rod be connected with gland, spring is nested with the lower end at screw rod, and the upper end of this spring is bearing in the side of nutplate towards signal receiver seat, and the lower end of spring is bearing on jump ring, knob is fixed on the upper end of screw rod.

Also have in a specific embodiment of the present utility model, a screw hole is offered on the roof body of described housing and corresponding to the position of described screw rod, the upper end of described screw rod is stretched over outside described shell chamber by way of screw hole, on the roof body of housing and back to the side in shell chamber, be provided with a handle.

More of the present utility model and in a specific embodiment, described membrane pump comprises motor, eccentric disc, connecting rod, pump seat, valve film, valve plate, valve sheet, the pump housing and pump seat lid, motor and described data processing circuit plate are electrically connected and are fixed on motor cabinet with horizontally-arranged state, and motor cabinet and pump seat towards under side fix, the motor shaft of motor is passed motor cabinet and is bearing in rotationally on motor cabinet by motor shaft bearing, eccentric disc is fixed on motor shaft, and be fixed with an eccentric disk shaft at this eccentric disc towards the side of connecting rod, pump seat and described installing plate are fixed towards the side of described cap, this pump seat is configured with a pump housing container cavity, valve film to be arranged in pump housing container cavity and to be positioned at the bottom of pump housing container cavity, the upper end of connecting rod is fixedly connected with the central part of valve film, and the lower end of connecting rod is connected with described eccentric disk shaft, the lower containment of the pump housing is in described pump housing container cavity, the bottom surface of this pump housing contact with the edge of the circumferencial direction of valve film and this pump housing towards under side be configured with a valve plate container cavity, and the pump housing towards on side be configured with a pump housing air intake duct and a pump housing gas outlet, this pump housing air intake duct and pump housing gas outlet all communicate with valve plate container cavity, valve plate to be arranged in valve plate container cavity and to fix with the pump housing, this valve plate offers one from the upside of the thickness direction of valve plate the through valve plate suction hole to downside and a valve plate vent port, valve plate suction hole is corresponding with the aspiration lumen of pump housing air intake duct, and valve plate vent port is corresponding with the exhaust tube chamber of pump housing gas outlet, valve sheet to be arranged in valve plate container cavity and to be shelved on the top of valve plate, this valve sheet is provided with a suction valve chip and an exhaust valve plate, suction valve chip is corresponding with described valve plate suction hole, and exhaust valve plate is corresponding with described valve plate vent port, and when suction valve chip is in the state to the shutoff of described valve plate suction hole, described exhaust valve plate is in the state of opening described valve plate vent port, and when suction valve chip is in the state to the unlatching of valve plate suction hole, exhaust valve plate is in the state closed valve plate vent port, pump seat cover the position corresponded to above the pump housing and pump seat towards on side fix, and offer a pump housing resigning hole at the middle position of this pump seat lid, the position that top is corresponding to pump housing resigning hole of the described pump housing leans out described pump housing container cavity, the top of described exhaust tube chamber communicates with described shell chamber, described air intake duct is connected with described muffler.

In an of the present utility model and then specific embodiment, expand in the upper end of described connecting rod and be provided with a discoidal connecting rod holder, this connecting rod holder corresponds to the below of the central part of described valve film, and a valve mould plate is provided with on the top of valve film, this valve mould plate is corresponding with connecting rod holder and fix with connecting rod holder, a dead eye is configured with in the lower end of connecting rod, a bearing is provided with in this dead eye, the central authorities of this bearing have an eccentric disk shaft mating holes, and this eccentric disk shaft mating holes matches with described eccentric disk shaft.

Of the present utility model again more and in a specific embodiment, the distal end faces of described eccentric disk shaft offers a back-up ring screw hole, is fixed with one in the position corresponding to this back-up ring screw hole by back-up ring screw and uses for stopping described connecting rod the back-up ring avoiding connecting rod to shake off from eccentric disk shaft.

In an again of the present utility model and then specific embodiment, the coverage extent that a part for the passway that a part for the passway that described upper matching seat intake interface communicates with upper matching seat chamber by described partition simultaneously and interface of being given vent to anger by described lower matching seat communicate with lower matching seat chamber is blocked is 1/2nd or 2/5ths of the diameter of described passway.

One of technique effect of the technical scheme that the utility model provides, owing to dust laden air inlet tube being connected between signal receiving structure and dust sampling head under the prerequisite overcoming technology prejudice, thus the dust that swims in the air tackled by dust catching device can not drop on the light source part of the bottom in the transmitter seat light hole of the signal projector seat being positioned at signal transmitter structure, thus can ensure that signal receiving structure is received and come from the real light signal of light source part, make signal processing mechanism to real optical signal prosessing and reflection processes data really; Two, owing to being connected in series a pressure differential detection mechanism on the pipeline of connection signal trigger mechanism with the muffler of membrane pump, thus by pressure differential detection mechanism the pressure difference signal detected fed back to signal processing mechanism and controlled by the operating rate of signal processing mechanism to membrane pump, make air-flow keep stable, ultimate guarantee is to the accuracy of detection of the dust that swims in air; Three, middle position due to the bottom at housing is provided with tripod web joint, thus the utility model can be arranged on the terrace in tested place by means of tripod statically with temporary support fixed form, avoiding by people is guide and support the shaking phenomenon appeared in testing process; Four, the structure due to whole pressure differential detection mechanism is simple and volume is little, and thus not only processing, with easy for installation, but also can be connected in series on the pipeline of muffler effectively.

Accompanying drawing explanation

Fig. 1 is example structure figure of the present utility model.

Fig. 2 is the front schematic view of Fig. 1.

Fig. 3 is the schematic diagram after Fig. 1 removes 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 to enable the auditor of Patent Office especially the public clearly understand technical spirit of the present utility model and beneficial effect, applicant will elaborate below by way of example, but not all the restriction to the utility model scheme to the description of embodiment, any according to being only pro forma but not substantial equivalent transformation and all should being considered as the technical solution of the utility model category done by the utility model design.

Everyly in the following description relate to upper and lower, left and right, the concept of directivity (or claim directionality) of front and rear is all for the location status residing for the figure be described, object is to facilitate public understanding, thus can not be understood as being particularly limited to the technical scheme that the utility model provides.

Refer to Fig. 1, give a housing 1 such as preferably adopting ABS plastic to be shaped through Mold Making by nonmetallic materials, this housing 1 is configured with a shell chamber 11(also can claim housing chamber, as follows); Give a dust sampling head 2, this dust sampling head 2 is fixed on the wall body of housing 1; Give a signal processing mechanism 3, this signal processing mechanism 3 is arranged in shell chamber 11; Give a membrane pump 4, this membrane pump 4 to be arranged in shell chamber 11 and to be electrically connected with signal processing mechanism 3; Give signal receiving structure 5 and a signal transmitter structure 6, this signal receiving structure 5 and signal transmitter structure 6 cooperatively interact with the state of self correspondence and to be arranged in aforesaid shell chamber 11 and to be all electrically connected with signal processing mechanism 3; Give a dust catching device 7, this 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 described signal receiving structure 5 displacement up or down, this signal receiver seat governor motion 8 is corresponding to the position above signal receiving structure 5 and to be arranged in aforementioned shell chamber 11 and be connected with signal receiving structure 5.

Aforesaid dust sampling head 2 is connected with aforesaid signal receiving structure 5 by dust laden air inlet tube 10a, aforesaid membrane pump 4 is connected with aforesaid signal transmitter structure 6 by muffler 10b, and being connected in series (serial connection refers to be connected in series) on the pipeline of muffler 10b has a pressure differential detection mechanism 9, this pressure differential detection mechanism 9 to be fixed in shell chamber 11 and to be electrically connected with aforesaid signal processing mechanism 3.

From the preceding paragraph explanatory note, because the utility model overcomes the technology prejudice in prior art, dust laden air inlet tube 10a is connected between dust sampling head 2 and signal receiving structure 5, muffler 10b is connected between membrane pump and signal transmitter structure 6, thus desirable accuracy of detection can be guaranteed, also to mention because can not fall with the form naturally fallen at the dust of dust catching device 7 interception or claim to be deposited to below the light source part 62(of signal transmitter structure 6) on, thus embodied one of technique effect referred in the superincumbent technique effect hurdle of applicant objectively.Made again signal processing mechanism 3 obtain the pressure difference signal of air-flow and adjust according to the rotating speed of pressure difference signal to the motor 41 of membrane pump 4 due to setting up of pressure differential detection mechanism 9, the flowing of the dust laden air making to flow through dust laden air inlet tube 10a and the air flowing through muffler 10b remains on the plateau without big rise and big fall fluctuation, thus has cashed the technique effect two recorded in the superincumbent technique effect hurdle of applicant objectively.

Aforesaid housing 1 adopt cap gib screw 121 to be fixed with one for covering the cap 12 protected to the accent in shell chamber 11 in the position of the accent corresponding to aforementioned shell chamber 11, and an installing plate 111 is fixed with by installing plate gib screw 1112 in shell chamber 11, also show in FIG be formed in housing rear body towards side, shell chamber 11 and the screw holder 16 corresponding with installing plate gib screw 1112, installing plate gib screw 1112 is fixed with this screw holder 16.One is being offered for being inserted into the installing plate resigning hole 1111 between signal receiving structure 5 and signal transmitter structure 6 for aforesaid dust catching device 7 on this installing plate 111 and corresponding to position between aforementioned signal receiving mechanism 5 and signal transmitter structure 6, and offering a shape and the size housing rear resigning hole 13 identical with installing plate resigning hole 1111 on the rear wall body of housing 1 and corresponding to the position of installing plate resigning hole 1111, aforesaid dust catching device 7 is in a state of use successively after housing rear resigning hole 13 and installing plate resigning hole 1111 between insertion signal receiving structure 5 and signal transmitter structure 6.Aforesaid membrane pump 4, signal receiving structure 5, signal transmitter structure 6 and pressure differential detection mechanism 9 are all arranged on the side of installing plate 111 towards cap 12, as shown in Figure 1, signal receiving structure 5 and the position of signal transmitter structure 6 on installing plate 111 are positioned at the left side of installing plate 111, namely the left end of the length direction of installing plate 111 is positioned at, and the position of membrane pump 4 on installing plate 111 is positioned at the right side of installing plate 111, namely be positioned at the right-hand member of the length direction of installing plate 111, pressure differential detection mechanism 9 corresponds to the top of membrane pump 4.Aforesaid signal receiver seat governor motion 8 is supported on the side of installing plate 111 towards cap 12; The aforesaid position of signal processing mechanism 3 in shell chamber 11 is positioned at the upper left side in shell chamber 11; Aforesaid dust sampling head 2 is arranged on the right wall body of housing 1; Aforesaid dust laden air inlet tube 10a and muffler 10b is submissive flexible pipe, and submissive flexible pipe is preferably selected with pvc pipe, but also can select with similar pipe as rubber tube, etc.

Preferably, battery 112 is set in 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 to support.And then, in the bottom of housing 1, namely in shell bottom wall, (side back to shell chamber 11) arranges one piece of tripod web joint 18, this tripod web joint 18 offers a fixed orifice, fixed orifice is used for bringing to companion the utility model the tripod detecting place and is connected, thus embodies the corresponding technique effect referred in applicant's superincumbent technique effect hurdle.

As shown in Figure 1, the right wall body of housing 1 is fixed with a dust sampling head Connection Block 17, aforesaid dust sampling head 2 is threaded with this dust sampling head Connection Block 17, and whole dust sampling head 2 is positioned at outside shell chamber 11, aforesaid dust laden air inlet tube 10a is towards one end of dust sampling head 2 and dust sampling head Connection Block 17 fixing (inserting is fixed).Because the concrete structure of dust sampling head 2 belongs to known technology, such as can see Chinese patent CN2800261Y, thus applicant no longer launches explanation.

Please continue to refer to Fig. 1, aforesaid signal receiving structure 5 preferably but not the structure be definitely limited to is as follows: comprise signal receiver seat 51, gland 52, silicon optical sensor 53 and receiver inlet suction port 54, be positioned at middle position be configured with a receiver seat light hole 511 in the bottom of the short transverse of signal receiver seat 51, and offer a receiver seat air admission hole 512 communicated with receiver seat light hole 511 at signal receiver seat 51 towards the side of aforementioned cap 12, gland 52 is fixed on the top of signal receiver seat 51 by gland screw 522, and offer a screw rod lifting hole(eyelet) 521 matched for the aforesaid signal receiver seat governor motion 8 of confession at the middle position of this gland 52, silicon optical sensor 53 is being arranged on silicon optical sensor stator 532 corresponding to the position above receiver seat light hole 511, and this silicon optical sensor stator 532 is arranged in the stator chamber 513 on the top of the short transverse being formed in signal receiver seat 51, and silicon optical sensor extension line 531 and the aforementioned signal processing mechanism 3 of silicon optical sensor 53 are electrically connected, the position that receiver inlet suction port 54 is corresponding to receiver seat air admission hole 512 is fixed on signal receiver seat 51, and communicate with receiver seat light hole 511.In the present embodiment, aforesaid silicon optical sensor 53 be preferred, but not limited to select with produced by Anhui Boyuan Automation Instrument Co., Ltd. of Chinese Anhui Province and be AATM-II type silicon optical sensor in the model of market public offering before the application proposes.As preferred scheme, also one silicon optical sensor fender 5131 can be set in aforesaid stator chamber 513 and corresponding to the position above silicon optical sensor 53.

Aforesaid signal transmitter structure 6 preferably but not the structure be definitely limited to is as follows: comprise signal projector seat 61, light source part 62 and transmitter return-air joint 63, signal projector seat 61 adopts transmitter seat gib screw 616 to fix with installing plate 111 towards the side of aforementioned installing plate 111, a transmitter seat light hole 611 is configured with in the middle position of the short transverse of this signal projector seat 61, this transmitter seat light hole 611 is corresponding with aforesaid receiver seat light hole 511, and offer a transmitter seat return-air hole 612 communicated with transmitter seat light hole 611 at signal projector seat 61 towards the side of cap 12, light source part 62 is arranged on light source part holder 622 in the position of the bottom corresponding to transmitter seat light hole 611, and be electrically connected by light source part circuit 621 and aforementioned signal processing mechanism 3, described light source part holder 622 is fixed on the bottom of signal projector seat 61, the position that transmitter return-air joint 63 is corresponding to transmitter seat return-air hole 612 is fixed on signal projector seat 61, and communicate with aforesaid transmitter seat light hole 611.As preferred scheme, also can set up a protecting cover 6221 in the below corresponding to light source part holder 622, this protecting cover 6221 is fixed with the bottom of signal projector seat 61.Light source part 62 is essentially infrared light emission pipe.

Owing to mentioning above, whole dust sampling head 2 is positioned at outside shell chamber 11, has thus confirmed the saying of right wall body back to the side in shell chamber 11 that dust sampling head 2 leans out housing 1 simultaneously.Aforesaid dust laden air inlet tube 10a towards one end of receiver inlet suction port 54 be connected with receiver inlet suction port 54, and aforesaid muffler 10b is connected towards one end of transmitter return-air joint 63 with transmitter return-air joint 63.Aforesaid pressure differential detection mechanism 9 corresponds to the right side of signal receiver seat 51 under the state with membrane pump 4.

Aforesaid dust catching device 7 comprises purpose filter leaf clip 71 and a filter disc 72, one end of purpose filter leaf clip 71 is corresponding between aforementioned signal transmitter seat 51 and signal receiver seat 61 successively after aforementioned housing rear resigning hole 13 and installing plate resigning hole 1111, and offer purpose filter leaf clip through hole 711 in one end of this purpose filter leaf clip 71, this purpose filter leaf clip through hole 711 corresponds between aforementioned receiver seat light hole 511 and transmitter seat light hole 611, the other end of purpose filter leaf clip 71 is positioned at outside shell chamber 11, filter disc 72 is seized on both sides by the arms on purpose filter leaf clip 71, and this filter disc 72 communicates with receiver seat light hole 511 and transmitter seat light hole 611 in the position of purpose filter leaf clip through hole 711 simultaneously, the dust entering into receiver seat light hole 511 dust laden air is tackled in the position corresponding to purpose filter leaf clip through hole 711 by filter disc 72.In addition according to professional general knowledge, filter disc 72 can be changed.

Aforesaid signal receiver seat 51 offers a pair (also can be two to) transmitter seat guide pillar hole 514 towards the side of aforementioned signal transmitter seat 61, and being extended with a pair transmitter seat guide pillar 613 at signal projector seat 61 towards the side of signal receiver seat 51 and in the position corresponding to a pair transmitter seat guide pillar hole 514, this is slidably matched to transmitter seat guide pillar 613 and a pair transmitter seat guide pillar hole 514.This structural design has confirmed the corresponding technique effect referred in applicant's superincumbent technique effect hurdle.

Refer to Fig. 4 and composition graphs 1, the aforesaid pressure differential detection mechanism 9 being positioned at the right side of signal receiver seat 51 comprises bearing support 91, lower supporting frame 92, upper matching seat 93, lower matching seat 94 and partition 95, upper bearing support 91 is fixed on the side of described installing plate 111 towards described cap 12 by upper bearing support gib screw 911 with horizontal boom state, the position of lower supporting frame 92 below of bearing support 91 on corresponding to is fixed on the side of installing plate 111 towards cap 12 with horizontal boom state equally by lower supporting frame gib screw 921, and upper, lower supporting frame 91, be equipped between 92 one for by, lower supporting frame 91, the 92 bearing support attachment screws 96 linked together away from one end of installing plate 111, on, lower matching seat 93, 94 are arranged on the mated condition faced each other, lower supporting frame 91, between 92, and be configured with matching seat chamber 931 at upper matching seat 93 towards the side of lower matching seat 94, and be extended with matching seat intake interface 932 at the middle position on the top of upper matching seat 93, on this, matching seat intake interface 932 communicates with upper matching seat chamber 931, and matching seat intake interface 932 is stretched over the top of bearing support 91 on this through upper bearing support 91, be extended with matching seat at the sidepiece of upper matching seat 93 to give vent to anger interface 933, on this, matching seat interface 933 of giving vent to anger communicates with upper matching seat chamber 931, and matching seat is given vent to anger and interface 933 is connected with one end of matching seat pneumatic tube 9331 on this, on this matching seat pneumatic tube 9331 the other end towards aforementioned signal processing mechanism 3 direction extend and be connected with one first pressure transducer 93311, this the first compressive force sensor 93311 to be arranged on signal processing mechanism 3 and to be electrically connected with signal processing mechanism 3, lower matching seat 94 towards on the side of matching seat 93 be configured with matching seat chamber 941, this lower matching seat chamber 941 is corresponding with aforementioned upper matching seat chamber 931, be extended with matching seat at the middle position of the bottom of lower matching seat 94 to give vent to anger interface 942, this lower matching seat interface 942 of giving vent to anger communicates with lower matching seat chamber 941, and this lower matching seat is given vent to anger, interface 942 is stretched over the below of lower supporting frame 92 through lower supporting frame 92, lower matching seat 94 sidepiece and on corresponding to the give vent to anger position of below of interface 933 of matching seat be extended with the interface 943 of matching seat ventilation, this lower matching seat ventilation interface 943 communicates with lower matching seat chamber 941, and on this lower matching seat ventilation interface 943, be connected with one end of matching seat pneumatic tube 9431, the other end of this lower matching seat pneumatic tube 9431 extends towards the direction of aforementioned signal processing mechanism 3 and is connected with one second pressure transducer 94311, this second pressure transducer 94311 to be arranged on signal processing mechanism 3 and to be electrically connected with signal processing mechanism 3, the shape of partition 95 in semicircle lobe body, this partition 95 be arranged on by aforementioned, lower matching seat chamber 931, 941 cooperatively interact after in the common chamber formed, a part for the passway that a part for the passway simultaneously communicated with upper matching seat chamber 931 by aforementioned upper matching seat intake interface 932 by this partition 95 and interface 942 of being given vent to anger by aforementioned lower matching seat communicate with lower matching seat chamber 941 is blocked, aforesaid upper matching seat intake interface 932 and lower matching seat interface 942 of giving vent to anger is serially connected on the pipeline of aforementioned muffler 10b.The degree that a part for the passway that a part for the passway that aforementioned upper matching seat intake interface 932 communicates with upper matching seat chamber 931 by partition 95 said here simultaneously and interface 942 of being given vent to anger by lower matching seat communicate with lower matching seat chamber 941 is blocked is 1/2nd of the diameter of passway in the present embodiment, be matching seat intake interface 932 and lower matching seat give vent to anger interface 942 diameter (internal diameter) 1/2nd, but also can be 2/5ths, and even be 1/3rd.It can thus be appreciated that, the concept of aforesaid " part " be matching seat intake interface 932 and lower matching seat give vent to anger interface 942 diameter (internal diameter) 1/2nd, 2/5ths or 1/3rd.

The air-flow coming from muffler 10b enters upper matching seat chamber 931 through the upper matching seat intake interface 932 of upper matching seat 93, through not given vent to anger interface 942 and then the membrane pump 4 that also will describe in detail below entering by the lower matching seat that the region that partition 95 intercepts enters lower matching seat 94.When there is airwaves situation, the first pressure transducer 93311 and the second pressure transducer 94311 is fed back to respectively through upper matching seat pneumatic tube 9331 and lower matching seat pneumatic tube 9431 by the air of the air of giving vent to anger in interface 942 by way of upper matching seat intake interface 932 and lower matching seat also namely in upper and lower matching seat chamber 931,941, by the adjustment of rotational speed of motor 41 being about to the signal processing mechanism 3 pairs of membrane pumps 4 described in detail below, air-flow is kept stable (i.e. current stabilization), finally makes accuracy of detection be ensured.

Refer to Fig. 2, Fig. 3 and still composition graphs 1, aforesaid signal processing mechanism 3 comprises data processing circuit plate 31 and a data display screen 32, data processing circuit plate 31 is fixed on the side of rear wall body towards aforementioned shell chamber 11 of aforementioned housing 1 by circuit board gib screw 311, data display screen 32(Fig. 2 shows) be arranged on aforementioned cap 12 back to the side in shell chamber 11 and be electrically connected with data processing circuit plate 31.Aforesaid silicon optical sensor extension line 531, light source part circuit 621, membrane pump 4, first pressure transducer 93311 and the second pressure transducer 94311 are all electrically connected with aforementioned data treatment circuit plate 31.As shown in Figure 3, first, second pressure transducer 93311,94311 is arranged on data processing circuit plate 31.

Also show in FIG and be installed on switching motherboard 18(switching motherboard 18 that is on housing 1 and that be connected with the electrical control of aforementioned data treatment circuit plate 31 and also can claim guidance panel), this switching motherboard 18 is provided with the information (Fig. 2 shows) of such as " selection ", " confirmation ", " cancellation " and so on of pointing out operation to operator.

Please see Fig. 1 by emphasis, aforesaid signal receiver seat bindiny mechanism 8 comprises nutplate 81, bolt and nut 82, screw rod 83, spring 84 and knob 85, nutplate 81 is fixed on aforementioned installing plate 111 towards the side of cap 12 with the state of horizontal boom and corresponds to the top of aforementioned signal receiver seat 51, bolt and nut 82 is being arranged in nutplate 81 corresponding to the position above aforementioned screw rod lifting hole(eyelet) 521, the middle part of screw rod 83 and bolt and nut 82 threaded engagement, the upper end of screw rod 83 is stretched over outside shell chamber 11 through the roof body of aforementioned housing 1, and the below (namely entering in aforementioned stator chamber 513) being stretched over gland 52 after aforesaid screw rod lifting hole(eyelet) 521 in transit, the lower end of screw rod 83, and the circumferencial direction in the lower end of this screw rod 83 around screw rod 83 is configured with jump-ring slot 831, a jump ring 832 for making screw rod 83 be connected with gland 52 is embedded with in this jump-ring slot 831, specifically, limit screw rod 83 by jump ring 832 to deviate from from screw rod lifting hole(eyelet) 521, screw rod 83 is avoided to be separated with gland.In addition; in order to protect silicon optical sensor 53; can arrange a silicon optical sensor fender 5131 in aforesaid stator chamber 513 and corresponding to the position above silicon optical sensor 53, the effect of this silicon optical sensor fender 5131 is: avoid screw rod 83 excessively to undermining silicon optical sensor 53 during bottom offset.Spring 84 is nested with the lower end at screw rod 83, and the upper end of this spring 84 is bearing in the side of nutplate 81 towards signal receiver seat 51, and the lower end of spring 84 is bearing on jump ring 832.Knob 85 is fixed on the upper end of screw rod 83 by knob gib screw 851.It can thus be appreciated that the position that lower end is corresponding to screw rod lifting hole(eyelet) 521 of screw rod 83 is connected with gland 52, to drive signal receiver seat 51 upper and lower displacement by the suitable reverse rotation of screw rod 83 by gland 52.

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

Still refer to Fig. 1, namely upper and offer one around the circumferencial direction in the aperture in aforementioned receiver seat light hole 511 and be depressed in the surface (basal surface) of signal receiver seat 51 and through receiver seat seal groove 515 in the downside of signal receiver seat 51 (bottom surface) towards the side of aforementioned signal transmitter seat 61 at aforementioned signal receiver seat 51, in this receiver seat seal groove 515, be embedded with a receiver seat O-ring seal 5151, namely upper and offer one around the circumferencial direction in the aperture in described transmitter seat light hole 611 and be depressed in the surface of signal projector seat 61 and through transmitter seat seal groove 614 at the upper side of signal projector seat 61 (end face) towards the side of signal receiver seat 51 at aforesaid signal projector seat 61, this transmitter seat seal groove 614 is corresponding with receiver seat seal groove 515, and be embedded with a transmitter seat O-ring seal 6141, this transmitter seat O-ring seal 6141 is corresponding with receiver seat O-ring seal 5151, and when making signal receiver seat 51 come downwards to the state contacted with signal projector seat 61 when operating the knob 85 of described signal receiver seat governor motion 8, aforesaid receiver seat O-ring seal 5151 matches with described transmitter seat O-ring seal 6141 and uses and seals the position that borders on of the edge in described receiver seat light hole 511 and transmitter seat light hole 611, vice versa.Be configured with purpose filter leaf clip slot 615 at aforementioned signal transmitter seat 61 towards the side of aforementioned signal receiver seat 51 and corresponding to the position of aforementioned installing plate resigning hole 1111, one end of aforesaid purpose filter leaf clip 71 to plug with this purpose filter leaf clip slot 615 together with aforesaid filter disc 72 and coordinates.Explanation from this section of word: the concept of the dust catching device 7 repeatedly mentioned above between signal receiver seat 51 and signal projector seat 61 refers in fact dust catching device 7 under the state being inserted in purpose filter leaf clip slot 615 between signal receiver seat 51 and signal projector seat 61.

When operator operates clockwise to knob 85, by knob 85, screw rod 83 is turned clockwise under the state matched with bolt and nut 82 and descending, because the lower end surface of screw rod 83 is corresponding with silicon optical sensor fender 5131, thus when screw rod 83 is descending, the acting force to bottom offset is applied to silicon optical sensor fender 53, signal picker seat 51 is forced to follow aforesaid a pair transmitter seat guide pillar 613 descending, make receiver seat O-ring seal 5151 and transmitter seat O-ring seal 6141 good contact each other, the light launched to transmitter seat light hole 611 by light source part 62 is avoided outwardly to spread, namely light leak is avoided, guarantee the response effect of silicon optical sensor 53 pairs of light signals.When detecting end also for taking-up dust catching device 7 and/or to signal receiving structure 5 and 6 inspection of signal transmitter structure, turn knobs 85 so counterclockwise.

Refer to Fig. 5 and continue composition graphs 1, aforesaid membrane pump 4 comprises motor 41, eccentric disc 42, connecting rod 43, pump seat 44, valve film 45, valve plate 46, valve sheet 47, the pump housing 48 and pump seat lid 49, motor 41 and aforesaid data processing circuit plate 31 are electrically connected and are fixed on motor cabinet 412 by motor gib screw 413 with horizontally-arranged state, and motor cabinet 412 and pump seat 44 towards under side fix, the motor shaft 411 of motor 41 passes motor cabinet 412 and is bearing on motor cabinet 412 rotationally by motor shaft bearing 4111, the middle position of eccentric disc 42 is configured with a motor shaft mating holes 422, this motor shaft mating holes 422 matches with motor shaft 411, namely motor shaft 411 inserts motor shaft mating holes 422, and by the eccentric disc gib screw 423 communicated with motor shaft mating holes 422 be arranged on eccentric disc 42, eccentric disc 42 is reliably fixed on motor shaft 411, an eccentric disk shaft 421 is fixed with towards the side of connecting rod 43 at this eccentric disc 42, pump seat 44 supports corner fittings 442 by pump seat and shows by means of supporting corner fittings gib screw 4421(Fig. 1) fix towards the side of aforementioned cap 12 with aforementioned installing plate 111, and the below (Fig. 1 shows) of interface 942 of giving vent to anger corresponding to aforementioned lower matching seat, this pump seat 44 is configured with a pump housing container cavity 441, valve film 45 to be arranged in pump housing container cavity 441 and to be positioned at the bottom of pump housing container cavity 441, the upper end of connecting rod 43 is fixedly connected with the central part of valve film 45, 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 aforementioned pump housing container cavity 441, the bottom surface of this pump housing 48 contact with the edge of the circumferencial direction of valve film 45 and this pump housing 48 towards under side be configured with a valve plate container cavity 481, and the pump housing 48 towards on side be configured with pump housing air intake duct 482 and a pump housing gas outlet 483, this pump housing air intake duct 482 and pump housing gas outlet 483 all communicate with valve plate container cavity 481, valve plate 46 to be arranged in valve plate container cavity 481 and fixing with the pump housing 48 in the position corresponding to the pump housing screw 484 be preset on the pump housing 48 by a pair valve plate gib screw 463, this valve plate 46 offers one from the upside of the thickness direction of valve plate 46 the through valve plate suction hole 461 to downside and a valve plate vent port 462, valve plate suction hole 461 is corresponding with the aspiration lumen 4821 of pump housing air intake duct 482, and valve plate vent port 462 is corresponding with the exhaust tube chamber 4831 of pump housing gas outlet 483, valve sheet 47 to be arranged in valve plate container cavity 481 and to be shelved on the top of valve plate 46, this valve sheet 47 is provided with suction valve chip 471 and an exhaust valve plate 472, suction valve chip 471 is corresponding with described valve plate suction hole 461, and exhaust valve plate 472 is corresponding with described valve plate vent port 462, as shown in Figure 5, a pair valve sheet screw hole 473 is offered on valve sheet 47 and corresponding to the position of aforesaid a pair valve plate fixing screw hole 463, a pair valve plate gib screw 463 through this to after valve sheet screw hole 473 and pump housing screw hole 484 fix.And when suction valve chip 471 is in the state to valve plate suction hole 461 shutoff, aforementioned exhaust valve plate 472 is in the state of opening valve plate vent port 462, and when suction valve chip 471 is in the state opened valve plate suction hole 461, exhaust valve plate 472 is in the state closed valve plate vent port 462, a pump seat lid screw hole 492 is respectively offered in four bights of pump seat lid 49, namely pump seat lid screw hole 492 has four, the position that four pump seat lid gib screws 4921 are corresponding to pump seat lid screw hole 492 is adopted to be fixed in the position corresponded to above the pump housing 48 and the pump seat screw hole 443 be preset on pump seat 44 by pump seat lid 49, and by two the pump seat lid gib screws (length of this two pump seat lid gib screws be greater than the length of all the other two pump seat lid gib screws) corresponding with aforementioned motor seat 412 in four pump seat lid gib screws 4921 after the pump seat screw hole 443 and then be screwed in the motor cabinet screw 4121 that defaults on motor cabinet 412.Offer a pump housing resigning hole 491 at the middle position of pump seat lid 49, the position that top is corresponding to pump housing resigning hole 491 of the aforementioned pump housing 48 leans out pump housing container cavity 441.The top of aforesaid exhaust tube chamber 4831 communicates with shell chamber 11, and the air of that is being discharged by pump housing gas outlet 483 enters shell chamber 11.From aforementioned explanation and by diagram, because air intake duct 482 and lower matching seat interface 942 of giving vent to anger communicates, again because upper matching seat intake interface 932 and lower matching seat interface 942 of giving vent to anger is connected in series on the pipeline of muffler 10b, thus air intake duct 482 is connected with muffler 10b in fact.

As shown in Figure 5, expand in the aforementioned upper end stating connecting rod 43 and be provided with a discoidal connecting rod holder 431, this connecting rod holder 431 corresponds to the below of the central part of aforementioned valve film 45, and a valve mould plate 451 is provided with on the top of valve film 45, this valve mould plate 451 is corresponding with connecting rod holder 431 and fixing with connecting rod holder 431 by valve mould plate bolt 4511, a dead eye 432 is configured with in the lower end of connecting rod 43, a bearing 4321 is provided with in this dead eye 432, the central authorities of this bearing 4321 have an eccentric disk shaft mating holes 43211, this eccentric disk shaft mating holes 43211 matches with aforesaid eccentric disk shaft 421.

Preferably, in the distal end faces of aforesaid eccentric disk shaft 421, (on the right-hand member end face of location status shown in Fig. 5) offers a back-up ring screw hole 4211, is fixed with one uses for stopping aforementioned connecting rod 43 back-up ring 42112 avoiding connecting rod 43 to shake off from eccentric disk shaft 421 in the position corresponding to this back-up ring screw hole 4211 by back-up ring screw 42111.

The structure of above-described membrane pump 4 is significantly simple due to structure relative to prior art (such as CN2799901Y and CN203925958U), thus embodies the relevant art effect described in the superincumbent technique effect hurdle of applicant objectively.

When motor 41 works, eccentric disc 42 is driven by motor shaft 411, moved up and down by eccentric disk shaft 421 drivening rod 43 on eccentric disc 42, because the upper end of connecting rod 43 is fixedly connected with the middle position of valve film 45, thus the middle section of valve film 45 (part corresponding with connecting rod holder 431) is made to do upwards to move with the mode of downward alternating movement by connecting rod 43.In this process, valve film 45 moves upward, and shows as exhaust, namely be vented by pump housing gas outlet 483, and pump housing air intake duct 482 air-breathing, when pump housing gas outlet 483 is vented, aforesaid exhaust valve plate 472 is in and is namely in the state of opening valve plate vent port 462 to the opening of the accent of exhaust tube chamber 4831, and namely shutoff (closing) state that suction valve chip 471 is in the accent to aspiration lumen 4821 is in the state closed valve plate suction hole 461, and when pump housing gas outlet 483 is vented, pump housing container cavity 441, valve plate vent port 462, the gas channel of exhaust valve plate 472 and exhaust tube chamber 4831 communicates, and pump housing container cavity 441, valve plate suction hole 461, the gas channel of suction valve chip 471 and aspiration lumen 4821 does not communicate, because suction valve chip 471 is in the sealed condition to valve plate suction hole 461, otherwise with example.So realize action of the present utility model with the state of exhaling and inspiratory phase replaces, for air-breathing, the dust laden air of Work places is able to the receiver inlet suction port 54 of the structural system being introduced signal receiving structure 5 by dust sampling head 2 through dust laden air inlet tube 10a, and in the receiver seat light hole 511 of entering signal receiver seat 51, dust is then tackled by the filter disc 72 of dust catching device 7, the transmitter seat light hole 611 of air then entering signal transmitter seat 61, the aspiration lumen 4821 of pump housing air intake duct 482 is entered by way of pressure differential detection mechanism 9 by muffler 10b again through transmitter return-air joint 63, and then be in closed condition by way of the suction valve chip 471(exhaust valve plate 472 being now in opening), valve plate suction hole 461 enters pump housing container cavity 441.So when pump housing gas outlet 483 is vented, so air just successively from pump housing container cavity 441, valve plate vent port 462, be in opening exhaust valve plate 472(now suction valve chip 471 be in closed condition), until discharged by pump housing gas outlet 483.

When filter disc 72(adopts filter paper usually) on dust when building up, although the light quantity that light source part 62 is launched is constant, but the Infrared signal making silicon optical sensor 53 receive because of filter disc 72 rounds blocking of dust (because light source part 62 for infrared light emission pipe) changes, thus by the data processing circuit plate 31 of signal processing mechanism 3 through converting and the dust concentration numerical value that swims in definite value and air being shown on data display screen 32.

In sum, the technical scheme that the utility model provides compensate for the deficiency in prior art all sidedly, successfully complete invention task, objective and embody all technique effects sketched in applicant's superincumbent technique effect hurdle faithfully, can yet be regarded as is a ultimate attainment technical scheme.

Claims (10)

1. have a direct-reading dust concentration detector for pressure differential detection function, comprising formation has a housing (1) in shell chamber (11); One dust sampling head (2), this dust sampling head (2) is fixed on the wall body of described housing (1); One signal processing mechanism (3), this signal processing mechanism (3) is arranged in described shell chamber (11); One membrane pump (4), this membrane pump (4) is arranged in described shell chamber (11) and is electrically connected with described signal processing mechanism (3); One signal receiving structure (5) and a signal transmitter structure (6), this signal receiving structure (5) and signal transmitter structure (6) cooperatively interact with the state of self correspondence and are arranged in described shell chamber (11) and are all electrically connected with described signal processing mechanism (3); One dust catching device (7), this dust catching device (7) is plugged between described signal receiving structure (5) and signal transmitter structure (6) in a state of use; One for making the signal receiver seat governor motion (8) of described signal receiving structure (5) displacement up or down, and this signal receiver seat governor motion (8) is arranged in described shell chamber (11) and with signal receiving structure (5) is connected in the position of the top that corresponds to signal receiving structure (5); wherein: go up at described housing (1) and be fixed with one in the position of the accent that corresponds to described shell chamber (11) and cover for the accent to shell chamber (11) cap (12) protecting, and have an installing plate (111) at shell chamber (11) internal fixtion, described membrane pump (4), signal receiving structure (5) and signal transmitter structure (6) are all arranged on the side of described installing plate (111) towards described cap (12), and signal receiving structure (5) and the position of signal transmitter structure (6) on installing plate (111) are positioned at the left side of installing plate (111), and the position of membrane pump (4) on installing plate (111) is positioned at the right side of installing plate (111), described signal receiver seat governor motion (8) is supported on the side of installing plate (111) towards cap (12), the position of described signal processing mechanism (3) in described shell chamber (11) is positioned at the upper left side of shell chamber (11), characterized by further comprising a pressure differential detection mechanism (9), this pressure differential detection mechanism (9) is arranged on the side of described installing plate (111) towards described cap (12) in the position of the top that corresponds to described membrane pump (4), described dust sampling head (2) is connected with described signal receiving structure (5) by dust laden air inlet tube (10a), described membrane pump (4) is connected with described signal transmitter structure (6) by muffler (10b), described pressure differential detection mechanism (9) comprises bearing support (91), lower supporting frame (92), upper matching seat (93), lower matching seat (94) and partition (95), upper bearing support (91) is fixed on the side of described installing plate (111) towards described cap (12) by upper bearing support hold-down screw (911) with horizontal boom stateThe position of lower supporting frame (92) below of bearing support (91) on corresponding to is fixed on the side of installing plate (111) towards cap (12) with horizontal boom state by lower supporting frame hold-down screw (921) equally, and upper, lower supporting frame (91, 92) between, be equipped with one for by, lower supporting frame (91, 92) the bearing support attachment screw (96) linking together away from one end of installing plate (111), on, lower matching seat (93, 94) be arranged on the mated condition facing each other, lower supporting frame (91, 92) between, and form at upper matching seat (93) have matching seat chamber (931) on one towards the side of lower matching seat (94), and be extended with matching seat intake interface (932) in the middle position on the top of upper matching seat (93), on this, matching seat intake interface (932) communicates with upper matching seat chamber (931), and on this, matching seat intake interface (932) is stretched over the top of bearing support (91), the interface (933) of giving vent to anger of matching seat on is extended with at the sidepiece of upper matching seat (93), on this, the matching seat interface (933) of giving vent to anger communicates with upper matching seat chamber (931), and matching seat is given vent to anger and is connected with one end of matching seat pneumatic tube (9331) on interface (933) on this, on this, the other end of matching seat pneumatic tube (9331) extends towards the direction of described signal processing mechanism (3) and is connected with one first pressure sensor (93311), this the first compressive force sensor (93311) is arranged on signal processing mechanism (3) and is electrically connected with signal processing mechanism (3), form at lower matching seat (94) have matching seat chamber (941) towards the side of upper matching seat (93), this lower matching seat chamber (941) is corresponding with described upper matching seat chamber (931), the interface (942) of giving vent to anger of matching seat is extended with in the middle position of the bottom of lower matching seat (94), this lower matching seat interface (942) of giving vent to anger communicates with lower matching seat chamber (941), and this lower matching seat interface (942) of giving vent to anger is stretched over the below of lower supporting frame (92), at the sidepiece of lower matching seat (94) and corresponding to the give vent to anger position of below of interface (933) of matching seat and be extended with matching seat ventilation interface (943), this lower matching seat ventilation interface (943) communicates with lower matching seat chamber (941), and be connected with one end of matching seat pneumatic tube (9431) on this lower matching seat ventilation interface (943), the other end of this lower matching seat pneumatic tube (9431) is towards the extension of the direction of described signal processing mechanism (3) and be connected with one second pressure sensor (94311), this second pressure sensor (94311) is arranged on signal processing mechanism (3) and is electrically connected with signal processing mechanism (3), partition (95) is in the shape of semicircle lobe body, this partition (95) be arranged on by described, lower matching seat chamber (931, 941) after cooperatively interacting in the common chamber that forms,Block with a part for the passway that lower matching seat chamber (941) communicates by a part for described upper matching seat intake interface (932) and the passway that upper matching seat chamber (931) communicates and by the described lower matching seat interface (942) of giving vent to anger by this partition (95), described upper matching seat intake interface (932) and the lower matching seat interface (942) of giving vent to anger is connected in series on the pipeline of described muffler (10b) simultaneously; In the middle position of the bottom of described housing (1) and the side in described shell chamber (11) is provided with a tripod connecting plate (18), this tripod connecting plate (18) offers one for by tripod connecting plate fixing hole fixing to tripod connecting plate (18) and the tripod of temporary support on terrace.

2. the direct-reading dust concentration detector with pressure differential detection function according to claim 1, it is characterized in that going up at described installing plate (111) and offering one corresponding to the position between described signal receiving structure (5) and signal transmitter structure (6) for being inserted into the installing plate resigning hole (1111) between signal receiving structure (5) and signal transmitter structure (6) for described dust catching device (7), a shape and the size housing rear resigning hole (13) identical with installing plate resigning hole (1111) is offered on the rear wall body of housing (1) and corresponding to the position of installing plate resigning hole (1111), described dust catching device (7) inserts between signal receiving structure (5) and signal transmitter structure (6) by way of housing rear resigning hole (13) and installing plate resigning hole (1111) in a state of use successively afterwards, described dust sampling head (2) is arranged on the right wall body of housing (1), and described dust laden air inlet tube (10a) and muffler (10b) are submissive flexible pipe, described signal receiving structure (5) comprises signal receiver seat (51), gland (52), silicon optical sensor (53) and receiver inlet suction port (54), be positioned at middle position be configured with a receiver seat light hole (511) in the bottom of the short transverse of signal receiver seat (51), and offer a receiver seat air admission hole (512) communicated with receiver seat light hole (511) at signal receiver seat (51) towards the side of described cap (12), gland (52) is fixed on the top of signal receiver seat (51), and offer a screw rod lifting hole(eyelet) (521) matched for the described signal receiver seat governor motion (8) of confession at the middle position of this gland (52), silicon optical sensor (53) is arranged on silicon optical sensor stator (532) in the position of the top corresponding to described receiver seat light hole (511), and this silicon optical sensor stator (532) is arranged in the stator chamber (513) on the top of the short transverse being formed in signal receiver seat (51), and the silicon optical sensor extension line (531) of silicon optical sensor (53) and described signal processing mechanism (3) are electrically connected, the position that receiver inlet suction port (54) is corresponding to receiver seat air admission hole (512) is fixed on signal receiver seat (51), and communicate with described receiver seat light hole (511), described signal transmitter structure (6) comprises signal projector seat (61), light source part (62) and transmitter return-air joint (63), signal projector seat (61) is fixed towards the side of described installing plate (111) and installing plate (111), a transmitter seat light hole (611) is configured with in the middle position of the short transverse of this signal projector seat (61), this transmitter seat light hole (611) is corresponding with described receiver seat light hole (511), and offer a transmitter seat return-air hole (612) communicated with transmitter seat light hole (611) at signal projector seat (61) towards the side of described cap (12), light source part (62) is arranged on light source part holder (622) in the position of the bottom corresponding to transmitter seat light hole (611), and be electrically connected by light source part circuit (621) and described signal processing mechanism (3), described light source part holder (622) is fixed on the bottom of signal projector seat (61), the position that transmitter return-air joint (63) is corresponding to transmitter seat return-air hole (612) is fixed on signal projector seat (61), and communicate with described transmitter seat light hole (611), described dust sampling head (2) leans out the side of right wall body back to described shell chamber (11) of described housing (1), described dust laden air inlet tube (10a) is connected with described receiver inlet suction port (54), and described muffler (10b) is connected with described transmitter return-air joint (63), described signal processing mechanism (3) comprises a data processing circuit plate (31) and a data display screen (32), data processing circuit plate (31) is fixed on the side of rear wall body towards described shell chamber (11) of described housing (1), data display screen (32) is arranged on described cap (12) back to the side of described shell chamber (11) and is electrically connected with data processing circuit plate (31), described silicon optical sensor extension line (531), light source part circuit (621), membrane pump (4), first pressure transducer (93311) and the second pressure transducer (94311) are all electrically connected with described data processing circuit plate (31), the position that described signal receiver seat governor motion (8) is corresponding to described screw rod lifting hole(eyelet) (521) is connected with described gland (52).

3. the direct-reading dust concentration detector with pressure differential detection function according to claim 2, it is characterized in that described dust catching device (7) comprises a purpose filter leaf clip (71) and a filter disc (72), one end of purpose filter leaf clip (71) is corresponding between described signal projector seat (51) and signal receiver seat (61) successively after described housing rear resigning hole (13) and installing plate resigning hole (1111), and offer purpose filter leaf clip through hole (711) in one end of this purpose filter leaf clip (71), this purpose filter leaf clip through hole (711) is corresponding between described receiver seat light hole (511) and transmitter seat light hole (611), the other end of purpose filter leaf clip (71) is positioned at described shell chamber (11) outward, filter disc (72) is seized on both sides by the arms on purpose filter leaf clip (71), and this filter disc (72) communicates with receiver seat light hole (511) and transmitter seat light hole (611) in the position of purpose filter leaf clip through hole (711) simultaneously, to offer one towards the side of described signal projector seat (61) and around the circumferencial direction in the aperture of described receiver seat light hole (511) described signal receiver seat (51) and be depressed in the surface of signal receiver seat (51) and through receiver seat seal groove (515), in this receiver seat seal groove (515), be embedded with a receiver seat O-ring seal (5151), to offer one towards the side of signal receiver seat (51) and around the circumferencial direction in the aperture of described transmitter seat light hole (611) at described signal projector seat (61) and be depressed in the surface of signal projector seat (61) and through transmitter seat seal groove (614), this transmitter seat seal groove (614) is corresponding with receiver seat seal groove (515), and be embedded with a transmitter seat O-ring seal (6141), this transmitter seat O-ring seal (6141) is corresponding with receiver seat O-ring seal (5151), and when making signal receiver seat (51) come downwards to the state contacted with signal projector seat (61) to described signal receiver seat governor motion (8) operation, described receiver seat O-ring seal (5151) matches with described transmitter seat O-ring seal (6141) and uses and seal the position that borders on of the edge in described receiver seat light hole (511) and transmitter seat light hole (611), be configured with purpose filter leaf clip slot (615) described signal projector seat (61) towards the side of described signal receiver seat (51) and corresponding to the position of described installing plate resigning hole (1111), one end of described purpose filter leaf clip (71) to plug with this purpose filter leaf clip slot (615) together with described filter disc (72) and coordinates.

4. the direct-reading dust concentration detector with pressure differential detection function according to claim 2, it is characterized in that offering at least one pair of transmitter seat guide pillar hole (514) at described signal receiver seat (51) towards the side of described signal projector seat (61), and be extended with a pair transmitter seat guide pillar (613) at signal projector seat (61) towards the side of signal receiver seat (51) and in the position corresponding to a pair transmitter seat guide pillar hole (514), this is slidably matched to transmitter seat guide pillar (613) and a pair transmitter seat guide pillar hole (514).

5. the direct-reading dust concentration detector with pressure differential detection function according to claim 2, it is characterized in that described signal receiver seat bindiny mechanism (8) comprises nutplate (81), bolt and nut (82), screw rod (83), spring (84) and knob (85), nutplate (81) is fixed on described installing plate (111) towards the side of described cap (12) with the state of horizontal boom and corresponds to the top of described signal receiver seat (51), bolt and nut (82) is arranged in nutplate (81) in the position of the top corresponding to described screw rod lifting hole(eyelet) (521), the middle part of screw rod (83) and bolt and nut (82) threaded engagement, the upper end of screw rod (83) is stretched over described shell chamber (11) outward through the roof body of described housing (1), and the lower end of screw rod (83) is stretched over the below of described gland (52) by way of screw rod lifting hole(eyelet) (521), and be configured with a jump-ring slot (831) in the lower end of this screw rod (83), this jump-ring slot (831) is provided with a jump ring (832) for making screw rod (83) be connected with gland (52), spring (84) is nested with the lower end in screw rod (83), and the upper end of this spring (84) is bearing in the side of nutplate (81) towards signal receiver seat (51), and the lower end of spring (84) is bearing on jump ring (832), knob (85) is fixed on the upper end of screw rod (83).

6. the direct-reading dust concentration detector with pressure differential detection function according to claim 5, to it is characterized in that on the roof body of described housing (1) and to offer a screw hole (14) in the position corresponding to described screw rod (83), the upper end of described screw rod (83) is stretched over described shell chamber (11) outward by way of screw hole (14), on the roof body of housing (1) and back to the side of shell chamber (11), be provided with a handle (15).

7. the direct-reading dust concentration detector with pressure differential detection function according to claim 2, it is characterized in that described membrane pump (4) comprises motor (41), eccentric disc (42), connecting rod (43), pump seat (44), valve film (45), valve plate (46), valve sheet (47), the pump housing (48) and pump seat lid (49), motor (41) and described data processing circuit plate (31) are electrically connected and are fixed on motor cabinet (412) with horizontally-arranged state, and motor cabinet (412) and pump seat (44) towards under side fix, the motor shaft (411) of motor (41) is bearing on motor cabinet (412) through motor cabinet (412) and by motor shaft bearing (4111) rotationally, eccentric disc (42) is fixed on motor shaft (411), and be fixed with an eccentric disk shaft (421) at this eccentric disc (42) towards the side of connecting rod (43), pump seat (44) and described installing plate (111) are fixed towards the side of described cap (12), this pump seat (44) is configured with a pump housing container cavity (441), valve film (45) to be arranged in pump housing container cavity (441) and to be positioned at the bottom of pump housing container cavity (441), the upper end of connecting rod (43) is fixedly connected with the central part of valve film (45), and the lower end of connecting rod (43) is connected with described eccentric disk shaft (421), the lower containment of the pump housing (48) is in described pump housing container cavity (441), the bottom surface of this pump housing (48) contact with the edge of the circumferencial direction of valve film (45) and this pump housing (48) towards under side be configured with a valve plate container cavity (481), and be configured with a pump housing air intake duct (482) and a pump housing gas outlet (483) at the pump housing (48) towards upper side, this pump housing air intake duct (482) and pump housing gas outlet (483) all communicate with valve plate container cavity (481), it is interior and fixing with the pump housing (48) that valve plate (46) is arranged on valve plate container cavity (481), this valve plate (46) offers one from the upside of the thickness direction of valve plate (46) the through valve plate suction hole (461) to downside and a valve plate vent port (462), valve plate suction hole (461) is corresponding with the aspiration lumen (4821) of pump housing air intake duct (482), and valve plate vent port (462) is corresponding with the exhaust tube chamber (4831) of pump housing gas outlet (483), valve sheet (47) to be arranged in valve plate container cavity (481) and to be shelved on the top of valve plate (46), this valve sheet (47) is provided with a suction valve chip (471) and an exhaust valve plate (472), suction valve chip (471) is corresponding with described valve plate suction hole (461), and exhaust valve plate (472) is corresponding with described valve plate vent port (462), and when suction valve chip (471) is in the state to the shutoff of described valve plate suction hole (461), described exhaust valve plate (472) is in the state of opening valve plate vent port (462), and when suction valve chip (471) is in the state of opening valve plate suction hole (461), exhaust valve plate (472) is in the state closed valve plate vent port (462), the position of top and pump seat (44) that pump seat lid (49) is corresponding to the pump housing (48) are fixed towards upper side, and offer a pump housing resigning hole (491) at the middle position of this pump seat lid (49), the position that top is corresponding to pump housing resigning hole (491) of the described pump housing (48) leans out described pump housing container cavity (441), the top of described exhaust tube chamber (4831) communicates with described shell chamber (11), described air intake duct (482) is connected with described muffler (10b).

8. the direct-reading dust concentration detector with pressure differential detection function according to claim 7, it is characterized in that expanding in the upper end of described connecting rod (43) being provided with a discoidal connecting rod holder (431), this connecting rod holder (431) is corresponding to the below of the central part of described valve film (45), and a valve mould plate (451) is provided with on the top of valve film (45), this valve mould plate (451) is corresponding with connecting rod holder (431) and fixing with connecting rod holder (431), a dead eye (432) is configured with in the lower end of connecting rod (43), a bearing (4321) is provided with in this dead eye (432), the central authorities of this bearing (4321) have an eccentric disk shaft mating holes (43211), this eccentric disk shaft mating holes (43211) matches with described eccentric disk shaft (421).

9. the direct-reading dust concentration detector with pressure differential detection function according to claim 8, it is characterized in that offering a back-up ring screw hole (4211) in the distal end faces of described eccentric disk shaft (421), be fixed with one in the position corresponding to this back-up ring screw hole (4211) by back-up ring screw (42111) and use for stopping described connecting rod (43) back-up ring (42112) avoiding connecting rod (43) to shake off from eccentric disk shaft (421).

10. the direct-reading dust concentration detector with pressure differential detection function according to claim 1, is characterized in that the coverage extent that a part for the passway that the part of the passway that described upper matching seat intake interface (932) communicates with upper matching seat chamber (931) by described partition (95) simultaneously and interface (942) of being given vent to anger by described lower matching seat communicate with lower matching seat chamber (941) is blocked is 1/2nd or 2/5ths of the diameter of described passway.