CN104791229A - Diaphragm pump structure for direct-reading type dust concentration detector - Google Patents

Abstract

The invention provides a diaphragm pump structure for a direct-reading type dust concentration detector, and belongs to the field of environmental protection safety facilities. The diaphragm pump structure comprises a diaphragm pump assembly. The diaphragm pump structure is characterized in that the diaphragm pump assembly comprises a motor, an eccentric disc, a connection rod, a pump seat, a valve diaphragm, a valve plate, a valve piece, a pump body and a pump seat cover; the motor is fixed to a motor base, a motor shaft is supported on the motor base, and the eccentric disc is fixed to the motor shaft; one side of the eccentric disc is fixedly provided with an eccentric disc shaft, the pump seat forms a pump body containing cavity, and the valve diaphragm is arranged in the pump body containing cavity; the upper end of the connection rod is fixed to the center portion of the valve diaphragm, and the lower end of the connection rod is connected with the eccentric disc shaft; the lower portion of the pump body is contained in the pump body containing cavity, and the side, facing upwards, of the pump body forms a pump body air suction pipe and a pump body exhaust pipe; the valve plate is arranged in the valve plate containing cavity, and the valve plate is provided with a valve plate suction hole and a valve plate exhaust hole; the valve piece is provided with a suction valve piece body and an exhaust valve piece body, the suction valve piece body corresponds to the valve plate suction hole, and the exhaust valve piece body corresponds to the valve plate exhaust hole. The diaphragm pump structure is convenient to manufacture and mount and good in structural reasonability, gas resistance is lowered, and energy consumption is saved.

Description

The diaphragm pump structure of direct-reading dust concentration detector

Technical field

The invention belongs to Environmental Safety facility technology field, be specifically related to a kind of diaphragm pump structure of direct-reading dust concentration detector.

Background technique

Those are easily produced in manufacturing operation process to the industry of dust; such as colliery, manufacture of cement industry, textile industry, phenolaldehyde moulding compound materials industry, electronic powder materials 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 flour mill of media report in the past, numb cotton mill exploded, metal product plant polishing departement explodes, and (as especially big aluminum dust explosive accident that Jiangsu Province, China city of Kunshan Zhong Rong fabricated metals Co., Ltd 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 occupation disease 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 be operation field or the dust concentration detection device claiming the workman in a line post to be equipped with various structural type or corresponding detecting instrument, this is comparatively general in colliery.In addition, the supervision instrument of dust concentration detector Ye Shi environmental administration, safety supervision department etc.

Direct-reading dust concentration detector is made up of signal transmitter structure, signal receiving structure, signal processing mechanism, dust sampling head and diaphragm 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 have " direct-reading dust concentration detector " (this patent is proposed by the applicant) and CN102419296B recommendation to have " direct-reading dust concentration measuring instrument ", etc.

The technical information about diaphragm pump can be seen in disclosed Chinese patent literature, as Authorization Notice No. CN2076235U recommends have " essential safety type dust sampler with two pump for coal mine " and CN2799901Y to provide " Bidirectional diaphragm pump ", the common feature of these two patents all has two diaphragms (also claiming diaphragm), motion is relatively steady and pulse pneumatic loss is little, but because they all belong to Bidirectional diaphragm pump category, thus overall structure is very complicated, not only making and installation troublesome maintenance, and lose relatively cheap.

" gas collecting vacuum diaphragm pump " that Authorization Notice No. CN203925958U introduces belongs to the structural system (only having one piece of barrier film) of unidirectional diaphragm pump, relative to aforementioned two patents, its structure is significantly simple and economical relatively inexpensive, and the concrete structure of this patent formula and corresponding technique effect can respectively see the 0017 to 0028 section, specification and the 0012nd sections.But still there is following shortcoming in this CN203925958U: one, owing to being formed in intake interface on first air chamber and exhaust port forms the relation of L-shaped with gas-entered passageway and exhaust passage respectively, thus vapour lock is relatively large, is unfavorable for saving the energy consumption as the motor of power, they are two years old, due to by suction valve chip (patent claims the first sealing rubber sheet gasket) and exhaust valve plate (patent claims the second sealing rubber sheet gasket) with on independently form is arranged at separately, between second air chamber, namely suction valve chip is arranged between the gas-entered passageway of first air chamber and the suction chamber of second air chamber with independently form, exhaust valve plate is arranged between the exhaust passage of first air chamber and the exhaust chamber of second air chamber with independently form, thus process and assemble and comparatively bother, especially once suction valve chip and exhaust valve plate occur even micro-vast displacement, all suction can be affected, exhaust effect and even cannot work, they are three years old, patent is only referred to diaphragm and valve film and is connected with the rotating shaft of motor and with the rotation of the rotating shaft of motor pump (the 0018th section, specification), but do not provide diaphragm how be connected with the rotating shaft of motor and how realize the enlightenment that diaphragm moved up and down when the axis of rotation of motor, because from convention, during the axis of rotation of motor, connected diaphragm can not realize moving up and down, unless be equipped with transition mechanism rational in infrastructure or claimed transition member between the rotating shaft and diaphragm of motor.

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 technological scheme described below.

Summary of the invention

Task of the present invention be to provide a kind of contribute to significantly reducing vapour lock and use save as the motor of power energy consumption, be conducive to making suction valve chip and exhaust valve plate to be arranged in identical carrier uses convenient manufacture with install and avoid working procedure occurs moving about and be of value to ensure valve film with the work of motor up-down alternative motion and use the diaphragm pump structure of the rational direct-reading dust concentration detector embodying structure.

Task of the present invention has been come like this, a kind of diaphragm pump structure of direct-reading dust concentration detector, comprise diaphragm pump assembly, feature is: described diaphragm pump assembly comprises motor, eccentric disc, connecting rod, pump seat, valve film, valve plate, valve sheet, the pump housing and pump seat lid, motor is 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 is configured with a pump housing receiving cavity, valve film to be arranged in pump housing receiving cavity and to be positioned at the bottom of pump housing receiving cavity, the upper end of connecting rod is fixedly connected with the central position 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 receiving cavity, the bottom surface of this pump housing contact with the position, edge of the circumferencial direction of valve film and this pump housing towards under side be configured with a valve plate receiving cavity, and the pump housing towards on side be configured with a pump housing sucking pipe and a pump housing outlet pipe, this pump housing sucking pipe and pump housing outlet pipe all communicate with valve plate receiving cavity, valve plate to be arranged in valve plate receiving 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 port to downside and a valve plate exhaust port, valve plate suction port is corresponding with the aspiration lumen of pump housing sucking pipe, and valve plate exhaust port is corresponding with the exhaust tube chamber of pump housing outlet pipe, valve sheet to be arranged in valve plate receiving 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 port, and exhaust valve plate is corresponding with described valve plate exhaust port, and when suction valve chip is in the state to the shutoff of valve plate suction port, described exhaust valve plate is in the state of opening valve plate exhaust port, and when suction valve chip is in the state to the unlatching of valve plate suction port, exhaust valve plate is in the state closed valve plate exhaust 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 receiving cavity, the top of described exhaust tube chamber communicates with described shell chamber.

In a specific embodiment of the present invention, expand in the upper end of described connecting rod and be provided with a discoidal connecting rod fixed base, this connecting rod fixed base corresponds to the below of the central position 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 fixed base and fix with connecting rod fixed base, a bearing hole is configured with in the lower end of connecting rod, a bearing is provided with in this bearing hole, the central authorities of this bearing have an eccentric disk shaft matching hole, and this eccentric disk shaft matching hole matches with described eccentric disk shaft.

In another specific embodiment of the present invention, 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 described connecting rod to shake off from eccentric disk shaft.

One of technique effect of technological scheme provided by the invention, due to the valve plate suction port three on the aspiration lumen of pump housing sucking pipe, the suction valve chip of valve sheet and valve plate is on same longitudinal axis, valve plate exhaust port three on the exhaust tube chamber of pump housing outlet pipe, the exhaust valve plate of valve sheet and valve plate is on same longitudinal axis simultaneously, thus significantly can reduce vapour lock, save the energy consumption of motor; Two, due to suction valve chip and exhaust valve plate are formed on valve sheet, and valve sheet is placed on valve plate, thus not only makes and easy for installation, and there will not be motility in the course of the work; Three, owing to being fixed with eccentric disc on motor shaft, the eccentric disc of eccentric disc is connected with the lower end of connecting rod and the upper end of connecting rod is connected with valve film, thus can ensure the middle section of valve film with the work of motor up-down alternative motion, there is good reasonable structure.

Accompanying drawing explanation

Fig. 1 is the enforcement illustration of diaphragm pump assembly of the present invention.

Fig. 2 is the application examples schematic diagram of the diaphragm pump assembly shown in Fig. 1 on direct-reading dust concentration detector.

Fig. 3 is the front schematic view of Fig. 2.

Fig. 4 is the schematic diagram after Fig. 2 removes cap.

Fig. 5 is the detailed structure view of the pressure differential detection mechanism shown in Fig. 2.

Embodiment

In order to enable the auditor of Patent Office especially the public clearly understand technical spirit of the present invention and beneficial effect, claimant will elaborate below by way of example, but be not all the restriction to the present invention program to the description of embodiment, any conceive according to the present invention done be only pro forma but not substantial equivalent transformation and all should be considered as technological scheme category of the present invention.

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 technological scheme provided by the invention.

Refer to Fig. 1, give a diaphragm pump assembly 4 of the structural system belonging to diaphragm pump structure of the present invention, this diaphragm pump assembly 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 is fixed on motor cabinet 412 by motor set screw 413 with the horizontally-arranged state of level, 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 matching hole 422, this motor shaft matching hole 422 matches with motor shaft 411, namely motor shaft 411 inserts motor shaft matching hole 422, and by the eccentric disc set screw 423 communicated with motor shaft matching hole 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 (right side of location status shown in Fig. 1) of connecting rod 43 at this eccentric disc 42, pump seat 44 is configured with a pump housing receiving cavity 441, valve film 45 to be arranged in pump housing receiving cavity 441 and to be positioned at the bottom of pump housing receiving cavity 441, the upper end of connecting rod 43 is fixedly connected with the central position 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 receiving cavity 441, the bottom surface of this pump housing 48 contacts 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 receiving cavity 481, and the pump housing 48 towards on side be configured with pump housing sucking pipe 482 and a pump housing outlet pipe 483, this pump housing sucking pipe 482 and pump housing outlet pipe 483 all communicate with valve plate receiving cavity 481, valve plate 46 to be arranged in valve plate receiving 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 set screw 463, this valve plate 46 offers one from the upside of the thickness direction of valve plate 46 the through valve plate suction port 461 to downside and a valve plate exhaust port 462, valve plate suction port 461 is corresponding with the aspiration lumen 4821 of pump housing sucking pipe 482, and valve plate exhaust port 462 is corresponding with the exhaust tube chamber 4831 of pump housing outlet pipe 483, valve sheet 47 to be arranged in valve plate receiving 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 port 461, and exhaust valve plate 472 is corresponding with described valve plate exhaust 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 set 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 aforementioned valve plate suction port 461 shutoff (namely closing), aforementioned exhaust valve plate 472 is in the state of opening valve plate exhaust port 462, and when suction valve chip 471 is in the state to valve plate suction port 461 unlatching, exhaust valve plate 472 is in the state closed valve plate exhaust 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 set 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 set screws (length of this two pump seat lid set screws be greater than the length of all the other two pump seat lid set screws) corresponding with aforementioned motor seat 412 in four pump seat lid set 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 receiving cavity 441.

As shown in Figure 1, expand in the aforementioned upper end stating connecting rod 43 and be provided with a discoidal connecting rod fixed base 431, this connecting rod fixed base 431 corresponds to the below of the central position 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 fixed base 431 and fixing with connecting rod fixed base 431 by valve mould plate bolt 4511, a bearing hole 432 is configured with in the lower end of connecting rod 43, a bearing 4321 is provided with in this bearing hole 432, the central authorities of this bearing 4321 have an eccentric disk shaft matching hole 43211, this eccentric disk shaft matching hole 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. 1) 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.

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 (namely the part corresponding with connecting rod fixed base 431 also correspond to the part of valve plate receiving cavity 481) is made to do upwards to move with the mode of downward alternating motion by connecting rod 43.In this process, valve film 45 moves upward, and shows as exhaust, namely be vented by pump housing outlet pipe 483, and pump housing sucking pipe 482 air-breathing, when pump housing outlet pipe 483 is vented, aforesaid exhaust valve plate 472 is in and is namely in the state of opening valve plate exhaust port 462 to the opening state 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 port 461, and when pump housing outlet pipe 483 is vented, pump housing receiving cavity 441, valve plate exhaust port 462, the air-flow path of exhaust valve plate 472 and exhaust tube chamber 4831 communicates, and pump housing receiving cavity 441, valve plate suction port 461, the air-flow path 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 port 461, otherwise with example.So realize action of the present invention with the state of exhaling and inspiratory phase replaces.

Refer to Fig. 2, the structural system of claimant to direct-reading dust concentration detector explains below, give a housing 1 such as preferably adopting ABS plastic to be shaped through Mold Making by nonmetallic material, 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 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 controlling mechanism 8 of aforementioned signal receiving mechanism 5 displacement up or down, this signal receiver seat controlling mechanism 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 diaphragm pump assembly 4 is arranged in shell chamber 11 and the aforementioned motor 41 of this diaphragm pump assembly 4 is electrically connected with signal processing mechanism 3.

Aforesaid dust sampling head 2 is connected with aforesaid signal receiving structure 5 by dust laden air inlet tube 10a, aforesaid diaphragm pump assembly 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, due to the technology prejudice (dust laden air inlet tube 10a is connected between dust sampling head 2 and signal transmitter structure 6 by prior art) overcome 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 diaphragm pump assembly 4 and signal transmitter structure 6, thus desirable testing precision can be guaranteed, also to mention because can not be fallen with the form naturally fallen by the dust that dust catching device 7 is tackled or claim to be deposited to below the light source part 62(of signal transmitter structure 6) on.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 aforementioned diaphragm pump assembly 4 due to the setting 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.

Aforesaid housing 1 adopt cap set 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 a mounting plate 111 is fixed with by mounting plate set screw 1112 in shell chamber 11, also show in fig. 2 be formed in housing rear body towards side, shell chamber 11 and the screw fixed base 16 corresponding with mounting plate set screw 1112, mounting plate set screw 1112 is fixed with this screw fixed base 16.One is being offered for being inserted into the mounting plate resigning hole 1111 between signal receiving structure 5 and signal transmitter structure 6 for aforesaid dust catching device 7 on this mounting 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 mounting plate resigning hole 1111 on the rear wall body of housing 1 and corresponding to the position of mounting plate resigning hole 1111, aforesaid dust catching device 7 is in a state of use successively after housing rear resigning hole 13 and mounting plate resigning hole 1111 between insertion signal receiving structure 5 and signal transmitter structure 6.The motor 41 of aforesaid diaphragm pump assembly 4, signal receiving structure 5, signal transmitter structure 6 and pressure differential detection mechanism 9 are all arranged on the side of mounting plate 111 towards cap 12; Aforesaid signal receiver seat controlling mechanism 8 is supported on the side of mounting 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 pipe, 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 diaphragm pump assembly 4 provide power supply to support.And then namely (side back to shell chamber 11) arranges one piece of tripod connecting plate 18 in shell bottom wall in the bottom of housing 1, this tripod connecting plate 18 offers a fixed hole, fixed hole is used for bringing to companion the present invention the tripod detecting place and is connected.

As shown in Figure 2, the right wall body of housing 1 is fixed with a dust sampling head connecting base 17, aforesaid dust sampling head 2 is threaded with this dust sampling head connecting base 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 connecting base 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 claimant no longer launches explanation.

Please continue to refer to Fig. 2, 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 photoreceptor 53 and receiver air input joint 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 inlet 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 controlling mechanism 8 of confession at the middle position of this gland 52, silicon photoreceptor 53 is being arranged on silicon photoreceptor fixed plate 532 corresponding to the position above receiver seat light hole 511, and this silicon photoreceptor fixed plate 532 is arranged in the fixed plate chamber 513 on the top of the short transverse being formed in signal receiver seat 51, and silicon photoreceptor lighting outlet 531 and the aforementioned signal processing mechanism 3 of silicon photoreceptor 53 are electrically connected, the position that receiver air input joint 54 is corresponding to receiver seat inlet hole 512 is fixed on signal receiver seat 51, and communicate with receiver seat light hole 511.In the present embodiment, aforesaid silicon photoreceptor 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 photoreceptor in the model of market public offering before the application proposes.As preferred scheme, also one silicon photoreceptor protecting sheet 5131 can be set in aforesaid fixed plate chamber 513 and corresponding to the position above silicon photoreceptor 53.

Aforesaid signal transmitter structure 6 preferably but not the structure be definitely limited to is as follows: comprise signal transmitter seat 61, light source part 62 and transmitter return-air joint 63, signal transmitter seat 61 adopts transmitter seat set screw 616 to fix with mounting plate 111 towards the side of aforementioned mounting plate 111, a transmitter seat light hole 611 is configured with in the middle position of the short transverse of this signal transmitter 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 transmitter seat 61 towards the side of cap 12, light source part 62 is arranged on light source part fixed base 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, said light source parts fixed base 622 is fixed on the bottom of signal transmitter seat 61, the position that transmitter return-air joint 63 is corresponding to transmitter seat return-air hole 612 is fixed on signal transmitter 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 fixed base 622, this protecting cover 6221 is fixed with the bottom of signal transmitter 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 air input joint 54 be connected with receiver air input joint 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 diaphragm pump assembly 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 mounting 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 transmitter 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.

Refer to Fig. 5 and composition graphs 2, 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 mounting plate 111 towards described cap 12 by upper bearing support set 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 mounting plate 111 towards cap 12 with horizontal boom state equally by lower supporting frame set 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 mounting 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, 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, 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 aforementioned partition 95 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 by the lower matching seat that the region that partition 95 intercepts enters lower matching seat 94, and then enters aforesaid diaphragm pump assembly 4.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 the motor 41 of signal processing mechanism 3 pairs of diaphragm pump assemblies 4, air-flow is kept stable (i.e. current stabilization), finally makes testing precision be ensured.

Refer to Fig. 3, Fig. 4 and still composition graphs 2, 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 set screw 311, data display screen 32(Fig. 3 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.Motor 41, first pressure transducer 93311 of aforesaid silicon photoreceptor lighting outlet 531, light source part circuit 621, diaphragm pump assembly 4 and the second pressure transducer 94311 are all electrically connected with aforementioned data processing circuit plate 31.As shown in Figure 4, first, second pressure transducer 93311,94311 is arranged on data processing circuit plate 31.

Also show in fig. 2 and be installed on switch plate 18(switch plate 18 that is on housing 1 and that be connected with the electrical control of aforementioned data processing circuit plate 31 and also can claim operation panel), this switch plate 18 is provided with the information (Fig. 3 shows) of such as " selection ", " confirmation ", " cancellation " and so on of pointing out operation to operator.

Please see Fig. 2 by emphasis, aforesaid signal receiver seat bindiny mechanism 8 comprises nut plate 81, bolt and nut 82, screw rod 83, spring 84 and knob 85, nut plate 81 is fixed on aforementioned mounting 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 nut plate 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 screw-thread fit, 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 fixed plate 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 photoreceptor 53; can arrange a silicon photoreceptor protecting sheet 5131 in aforesaid fixed plate chamber 513 and corresponding to the position above silicon photoreceptor 53, the effect of this silicon photoreceptor protecting sheet 5131 is: avoid screw rod 83 excessively to undermining silicon photoreceptor 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 nut plate 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 set 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 clockwise or counterclockwise gland 52 that is rotated through of screw rod 83.

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. 2, 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 (bottom 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 seal ring 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 transmitter seat 61 and through transmitter seat seal groove 614 at the upper side of signal transmitter seat 61 (end face) towards the side of signal receiver seat 51 at aforesaid signal transmitter seat 61, this transmitter seat seal groove 614 is corresponding with receiver seat seal groove 515, and be embedded with a transmitter seat seal ring 6141, this transmitter seat seal ring 6141 is corresponding with receiver seat seal ring 5151, and when operating the knob 85 of aforementioned signal receiver seat controlling mechanism 8 and making signal receiver seat 51 come downwards to the state contacted with signal transmitter seat 61 by screw rod 83, aforesaid receiver seat seal ring 5151 matches with aforesaid transmitter seat seal ring 6141 and uses and seals the position that borders on of the edge in aforementioned 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 mounting 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 transmitter 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 transmitter 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 photoreceptor protecting sheet 5131, thus when screw rod 83 is descending, the active force to bottom offset is applied to silicon photoreceptor protecting sheet 53, signal picker seat 51 is forced to follow aforesaid a pair transmitter seat guide pillar 613 descending, make receiver seat seal ring 5151 and transmitter seat seal ring 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 photoreceptor 53 pairs of optical 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.

As shown in Figure 2, the top of aforesaid i.e. exhaust tube chamber 4831 as shown in Figure 1 communicates with shell chamber 11, and the air of that is being discharged by pump housing outlet pipe 483 enters shell chamber 11.Aforesaid pump seat 44 supports corner fittings 442 by pump seat in a state of use and fixes towards the side of aforementioned cap 12 with mounting plate 111 by means of supporting corner fittings set screw 4421, and corresponds to the below of aforementioned lower matching seat interface 942.

For aforesaid diaphragm pump assembly 4 air-breathing, namely by connecting rod 43, the middle section of valve film 45 is moved downward, the dust laden air of Work places is able to the receiver air input joint 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 sucking pipe 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 state), valve plate suction port 461 enters pump housing receiving cavity 441.So when pump housing outlet pipe 483 is vented, so air just successively from pump housing receiving cavity 441, valve plate exhaust port 462, be in opening state exhaust valve plate 472(now suction valve chip 471 be in closed condition), until discharged by pump housing outlet pipe 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 IR signal making silicon photoreceptor 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, technological scheme provided by the invention compensate for the deficiency in prior art all sidedly, successfully complete invention task, objective and embody all technique effects sketched in claimant's superincumbent technique effect hurdle faithfully, can yet be regarded as is a ultimate attainment technological scheme.

Claims (3)

1. a kind of diaphragm pump structure of direct-reading dust concentration detector, comprise diaphragm pump assembly (4), it is characterized in that: described diaphragm pump assembly (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) is 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) is configured with a pump housing receiving cavity (441), valve film (45) to be arranged in pump housing receiving cavity (441) and to be positioned at the bottom of pump housing receiving cavity (441), the upper end of connecting rod (43) is fixedly connected with the central position 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 receiving cavity (441), the bottom surface of this pump housing (48) contact with the position, edge of the circumferencial direction of valve film (45) and this pump housing (48) towards under side be configured with a valve plate receiving cavity (481), and be configured with a pump housing sucking pipe (482) and a pump housing outlet pipe (483) at the pump housing (48) towards upper side, this pump housing sucking pipe (482) and pump housing outlet pipe (483) all communicate with valve plate receiving cavity (481), it is interior and fixing with the pump housing (48) that valve plate (46) is arranged on valve plate receiving cavity (481), this valve plate (46) offers one from the upside of the thickness direction of valve plate (46) the through valve plate suction port (461) to downside and a valve plate exhaust port (462), valve plate suction port (461) is corresponding with the aspiration lumen (4821) of pump housing sucking pipe (482), and valve plate exhaust port (462) is corresponding with the exhaust tube chamber (4831) of pump housing outlet pipe (483), valve sheet (47) to be arranged in valve plate receiving 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 port (461), and exhaust valve plate (472) is corresponding with described valve plate exhaust port (462), and when suction valve chip (471) is in the state to valve plate suction port (461) shutoff, described exhaust valve plate (472) is in the state of opening valve plate exhaust port (462), and when suction valve chip (471) is in the state of opening valve plate suction port (461), exhaust valve plate (472) is in the state closed valve plate exhaust 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 receiving cavity (441), the top of described exhaust tube chamber (4831) communicates with described shell chamber (11).

2. the diaphragm pump structure of direct-reading dust concentration detector according to claim 1, it is characterized in that expanding in the upper end of described connecting rod (43) being provided with a discoidal connecting rod fixed base (431), this connecting rod fixed base (431) is corresponding to the below of the central position 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 fixed base (431) and fixing with connecting rod fixed base (431), a bearing hole (432) is configured with in the lower end of connecting rod (43), a bearing (4321) is provided with in this bearing hole (432), the central authorities of this bearing (4321) have an eccentric disk shaft matching hole (43211), this eccentric disk shaft matching hole (43211) matches with described eccentric disk shaft (421).

3. the diaphragm pump structure of direct-reading dust concentration detector according to claim 1 and 2, 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 described connecting rod (43) to shake off from eccentric disk shaft (421).