CN104214078B - A kind of membrane pump with automatic protection functions and automatic protecting method thereof - Google Patents
A kind of membrane pump with automatic protection functions and automatic protecting method thereof Download PDFInfo
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- CN104214078B CN104214078B CN201410387265.1A CN201410387265A CN104214078B CN 104214078 B CN104214078 B CN 104214078B CN 201410387265 A CN201410387265 A CN 201410387265A CN 104214078 B CN104214078 B CN 104214078B
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Abstract
The present invention proposes a kind of membrane pump with automatic protection functions and automatic protecting method thereof, by being arranged to monitor the first pressure transducer of oil pressure in membrane pump septation oil pocket, for monitoring, membrane pump pumps the second pressure transducer of slurry pressure in outlet conduit, for monitoring, membrane pump pumps the 3rd pressure transducer of slurry pressure in inlet duct, jig frequency for monitoring piston jig frequency in membrane pump detects sensor and monitors the barrier film oil pressure of membrane pump in real time, slurry pressure, the parameters such as piston jig frequency, and the valve chamber of membrane pump is automatically judged based on the change of described parameter, barrier film, check valve, whether the easily worn part work such as piston cylinder are abnormal, it is achieved thereby that the self-protection function of membrane pump, improve cycle maximum service life (MSL) of each easily worn part of membrane pump, and reduce the maintenance cost of membrane pump, effectively raise the work efficiency of membrane pump.
Description
Technical field
The present invention relates to membrane pump technical field, more particularly relate to a kind of membrane pump with automatic protection functions and automatic protecting method thereof.
Background technology
Membrane pump be last century the seventies on the basis of reciprocating piston pump, increase chamber of septum develop, it is achieved that the isolation of pumped (conveying) medium and piston, thus creating a brand-new advanced conveying technology and equipment. there is many new advantages and the new features such as consumable accessory life-span high, maintenance simplicity, cycle-time efficiency height, low, the high-efficient energy-saving environment friendly of operating cost. membrane pump is the desirable renewal product of conventional piston pump, Pulp pump, centrifugal pump, oil pump, belong to the Core equipment of petrochemical industry, Coal Chemical Industry, alumina producing and high concentration, high abrasion solid liquid media long-distance pipeization conveying, be also that other pump class institutes are irreplaceable. but membrane pump belongs to the product of a kind of high added value high technology content, only have a few countries such as Holland can manufacture production at present in the world, make its price comparison expensive, once in use be damaged, not only maintenance cost is high, maintenance cycle is long, and the production efficiency affecting whole Slurry Pipeline Transportation system that can be serious, therefore need to protect its easily worn part to be without prejudice in the running of membrane pump, improve the service life of membrane pump to greatest extent, and how to realize the self-protection function of membrane pump, improve and be directly subordinate to the technical barrier of this technical field its service life one.
Summary of the invention
The present invention proposes a kind of membrane pump with automatic protection functions and automatic protecting method thereof based on what above-mentioned prior art problem was innovated, the barrier film oil pressure of membrane pump is monitored in real time by arranging some sensors, slurry pressure, the parameters such as piston jig frequency, and the valve chamber of membrane pump is automatically judged based on the change of described parameter, barrier film, check valve, whether the easily worn part work such as piston cylinder are abnormal, it is achieved thereby that the self-protection function of membrane pump, improve cycle maximum service life (MSL) of each easily worn part of membrane pump, and reduce the maintenance cost of membrane pump, effectively raise the work efficiency of membrane pump.
This invention address that the technical scheme that above-mentioned technical problem is taked is as follows:
A kind of membrane pump with automatic protection functions, including: Poewr transmission mechanism, piston rod 4, piston cylinder 5, barrier film oil pocket 6, barrier film 10, chamber of septum 11, outlet valve chamber 15, discharging check valve 16, pumping outlet conduit 17, entrance valve chamber 20, feed check valve 21 and pumping inlet duct 22, described Poewr transmission mechanism is connected to described piston rod 4, the telescopic moving in described piston cylinder 5 of described piston rod 4, described piston cylinder 5 is connected with described barrier film oil pocket 6, it is filled with hydraulic oil in described barrier film oil pocket 6, described barrier film oil pocket 6 is isolated by described barrier film 10 with described chamber of septum 11, the discharging opening of described chamber of septum 11 is connected to described outlet valve chamber 15, described discharging check valve 16 is arranged in described outlet valve chamber 15, the discharging opening of described outlet valve chamber 15 is connected to described pumping outlet conduit 17, the charging aperture of described chamber of septum 11 is connected to described entrance valve chamber 20, described feed check valve 21 is arranged in described entrance valve chamber 20, the charging aperture of described entrance valve chamber 20 is connected to described pumping inlet duct 22, also include control unit and the following sensor of at least one: for monitoring the first pressure transducer 14 of oil pressure in barrier film oil pocket 6, for monitoring the second pressure transducer 19 of slurry pressure in pumping outlet conduit 17, for monitoring the 3rd pressure transducer 24 of slurry pressure in pumping inlet duct 22, jig frequency for monitoring piston jig frequency detects sensor 25, described control unit is connected to described sensor and sensor-based Monitoring Data protects the operation of membrane pump automatically.
Further according to membrane pump of the present invention, wherein said first pressure transducer 14 is arranged at and connects on described barrier film oil pocket 6 inside and the pipeline with needle valve 13, the data output end of described first pressure transducer 14 is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard operating oil pressure within barrier film oil pocket when having membrane pump normal operation, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between oil pressure numerical value and the described standard operating oil pressure that the first pressure transducer 14 monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
Further according to membrane pump of the present invention; in wherein said automatic protection module, the standard operating oil pressure of storage is 2700-2900kpa; when the oil pressure numerical value that the first pressure transducer 14 monitors is less than 2700kpa or more than 2900kpa, described automatic protection module controls membrane pump autostop.
Further according to membrane pump of the present invention, first gas regulator 18 is wherein installed on described pumping outlet conduit 17, described second pressure transducer 19 is arranged on described first gas regulator 18, and monitor the slurry pressure in pumping outlet conduit 17 based on the dynamic equilibrium between the slurry pressure in the gas pressure intensity in the first gas regulator and pumping outlet conduit 17, the data output end of described second pressure transducer 19 is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard slurry pressure in pumping outlet conduit 17 when having membrane pump normal operation, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between slurry pressure value and the described standard slurry pressure that the second pressure transducer 19 monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
Further according to membrane pump of the present invention, second gas regulator 23 is wherein installed on described pumping inlet duct 22, described 3rd pressure transducer 24 is arranged on described second gas regulator 23, and monitor the slurry pressure in pumping inlet duct 22 based on the dynamic equilibrium between the slurry pressure in the gas pressure intensity in the second gas regulator and pumping inlet duct 22, the data output end of described 3rd pressure transducer 24 is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard slurry pressure in pumping inlet duct 22 when having membrane pump normal operation, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between slurry pressure value and the described standard slurry pressure that the 3rd pressure transducer 24 monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
Further according to membrane pump of the present invention; in wherein said automatic protection module, the standard slurry pressure of storage is 800-1000kpa; when the slurry pressure that the second pressure transducer 19 or the 3rd pressure transducer 24 monitor is less than 800kpa or more than 1000kpa, described automatic protection module controls membrane pump autostop.
Further according to membrane pump of the present invention, wherein said jig frequency detection sensor 25 is arranged in described Poewr transmission mechanism, and based on the jig frequency of the crank rotation cycle monitoring piston in Poewr transmission mechanism, the data output end of described jig frequency detection sensor 25 is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard piston jig frequency that when having membrane pump normal operation, various pump speed conditions are corresponding, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between piston jig frequency number and the described standard piston jig frequency that jig frequency detection sensor 25 monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
Further according to membrane pump of the present invention; wherein said membrane pump includes described first pressure transducer the 14, second pressure transducer the 19, the 3rd pressure transducer 24 and jig frequency detection sensor 25 simultaneously; described control unit is simultaneously coupled to each sensor, and automatically protects the operation of membrane pump based on the Monitoring Data of each sensor.
Further according to membrane pump of the present invention, wherein said Poewr transmission mechanism includes eccentric 1, connecting rod 2 and crosshead 3, described eccentric 1 is connected to connecting rod 2, and described connecting rod 2 is movably connected on one end of described crosshead 3, and the other end of described crosshead 3 is connected to described piston rod 4; Being provided with detection bar 9 on described barrier film 10, the position that described barrier film oil pocket 6 is corresponding with described detection bar 9 is provided with drain cock 7 and repairing switch 8, and described chamber of septum 11 is closed by barrier film gland 12.
A kind of membrane pump automatic protecting method carried out based on membrane pump of the present invention, at least one of comprises the following steps:
Step one, read the oil pressure numerical value in the barrier film oil pocket 6 that described first pressure transducer 14 monitors by control unit, when the standard operating oil pressure range of storage in described oil pressure numerical value deviation control unit, described control unit control membrane pump autostop;
Step 2, the slurry pressure value read by control unit in the pumping outlet conduit 17 that described second pressure transducer 19 monitors, when the standard slurry pressure range of storage in described slurry pressure value deviation control unit, described control unit control membrane pump autostop;
Step 3, the slurry pressure value read by control unit in the pumping inlet duct 22 that described 3rd pressure transducer 24 monitors, when the standard slurry pressure range of storage in described slurry pressure value deviation control unit, described control unit control membrane pump autostop;
Step 4, read the described jig frequency detection piston jig frequency number that monitors of sensor 25 by control unit; when in described piston jig frequency number deviation control unit storage corresponding pump speed when standard piston jig frequency scope time, by described control unit control membrane pump autostop.
Techniques below effect at least can be reached by technical scheme:
1), membrane pump of the present invention there is self-protection function, improve the service life of the easily worn parts such as its septation, check valve, piston cylinder to greatest extent, greatly reduce maintenance rate and the maintenance cost of membrane pump, improve the work efficiency of membrane pump.
2), membrane pump of the present invention realizes automatic protection functions by innovating placement sensor; and the structure of membrane pump self and operation can't be had any impact; and the automatic protection functions of operation exception can be achieved preferably through PLC, and use manipulation simple, replicability is strong.
Accompanying drawing explanation
Accompanying drawing 1 is the overall structure schematic diagram of the membrane pump with automatic protection functions of the present invention.
In figure, the implication of each accompanying drawing labelling is as follows:
1-eccentric, 2-connecting rod, 3-crosshead, 4-piston rod, 5-piston cylinder, 6-barrier film oil pocket, 7-drain cock, 8-repairing switchs, 9-detects bar, 10-barrier film, 11-chamber of septum, 12-barrier film gland, 13-needle valve, 14-the first pressure transducer, 15-exports valve chamber, 16-discharging check valve, 17-pumps outlet conduit, 18-the first gas regulator, 19-the second pressure transducer, 20-entrance valve chamber, 21-feed check valve, 22-pumps inlet duct, 23-the second gas regulator, 24-the 3rd pressure transducer, 25-jig frequency detection sensor, 26-slurry, 27-nitrogen, 28-fuel tank.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in detail, so that those skilled in the art can be more clearly understood from the present invention, but does not therefore limit the scope of the invention.
As shown in Figure 1, membrane pump entirety of the present invention includes eccentric 1, connecting rod 2, crosshead 3, piston rod 4, piston cylinder 5, barrier film oil pocket 6, drain cock 7, repairing switch 8, detection bar 9, barrier film 10, chamber of septum 11, barrier film gland 12, needle valve 13, first pressure transducer 14, outlet valve chamber 15, discharging check valve 16, pumping outlet conduit 17, first gas regulator 18, second pressure transducer 19, entrance valve chamber 20, feed check valve 21, pumping inlet duct 22, second gas regulator 23, 3rd pressure transducer 24 and jig frequency detection sensor 25. described eccentric 1, connecting rod 2 and crosshead 3 form Poewr transmission mechanism, for motion that convert rotational motion is in line, kinetic force is provided for piston, described eccentric 1 is connected to connecting rod 2, described connecting rod 2 is movably connected on one end of crosshead 3, the other end of described crosshead 3 is connected to piston rod 4, the telescopic moving in described piston cylinder 5 of described piston rod 4, described piston cylinder 5 is connected with described barrier film oil pocket 6, it is filled with hydraulic oil in described barrier film oil pocket 6, described hydraulic oil is supplied by fuel tank 28, described barrier film oil pocket 6 is isolated by barrier film 10 with described chamber of septum 11, described barrier film 10 is provided with detection bar 9, and described detection bar 9 is in described barrier film oil pocket 6, drain cock 7 and repairing switch 8 it is provided with in the position that sidewall and the described detection pole pair of described barrier film oil pocket are answered, described detection bar 9 is according to how many startup drain cocks 7 of oil mass in barrier film oil pocket and repairing switch 8, thus the oil mass ensured in barrier film oil pocket meets instructions for use. when piston rod 4 carries out telescopic moving, cause the pressure change of hydraulic oil in barrier film oil pocket, and then driven barrier film 10 to carry out flexible compressional movement to chamber of septum 11 inner chamber by the hydraulic oil in barrier film oil pocket, thus the slurry in chamber of septum inner chamber is produced pump action. described chamber of septum 11 is closed by barrier film gland 12. the discharging opening of described chamber of septum 11 is connected to outlet valve chamber 15, it is provided with discharging check valve 16 in described outlet valve chamber 15, the discharging opening of described outlet valve chamber 15 is connected to pumping outlet conduit 17, described pumping outlet conduit 17 is provided with the first gas regulator 18, described first gas regulator 18 is for carrying out damping to the slurry body in described pumping outlet conduit, it is filled with nitrogen 27 in described first gas regulator 18, and the pressure of nitrogen is in dynamic balance state with the pressure of the slurry 26 of conveying in pumping outlet conduit, the conveying capacity of slurry in described pumping outlet conduit can be controlled by adjusting the pressure of described nitrogen, therefore in described first gas regulator, the pressure of gas can send the pressure of slurry body in outlet conduit by reflected pump. the charging aperture of described chamber of septum 11 is connected to entrance valve chamber 20, it is provided with feed check valve 21 in described entrance valve chamber 20, the charging aperture of described entrance valve chamber 20 is connected to pumping inlet duct 22, described pumping inlet duct 22 is provided with the second gas regulator 23, described second gas regulator 23 is for carrying out damping to the slurry body in described pumping inlet duct, it is filled with nitrogen in described second gas regulator 23, described second gas regulator 23 is the same with the first gas regulator, inside is filled with nitrogen, and the pressure of nitrogen is in dynamic balance state with the slurry body pressure in pumping inlet duct, therefore in described second gas regulator, the pressure of gas can send the pressure of slurry body in inlet duct by reflected pump.
The sensing detection component that introduces of present invention innovation monitors the parameters such as the barrier film oil pressure of membrane pump, slurry pressure, piston jig frequency in real time, it is ensured that membrane pump has automatic protection functions, it is preferred that described sensing detection component at least includes one of mode arranged below:
Mode one: be provided with the first pressure transducer 14 for detecting oil pressure in barrier film oil pocket on described barrier film oil pocket 6, preferably described first pressure transducer 14 is arranged within connection barrier film oil pocket, on pipeline with needle valve 13, the oil pressure within barrier film oil pocket 6 can be detected in real time by described first pressure transducer 14, the data output end of described first pressure transducer is connected to the control unit of membrane pump, when the oil pressure within the barrier film oil pocket 6 that the first pressure transducer 14 detects is in non-normal working scope, described control unit controls membrane pump autostop, realize automatically protecting purpose. preferably in described control unit, it is provided with automatic protection module, described automatic protection module stores the normal operation oil pressure within barrier film oil pocket when having membrane pump normal operation, preferably it is in 2700-2900kpa, described automatic protection module has and compares to determine function, by comparing the relation between oil pressure numerical value and the critical field 2700-2900kpa stored in it that the first pressure transducer 14 detects, whether membrane pump described in automatic decision there is exception, and control membrane pump autostop when an exception occurs, when the piston of membrane pump or barrier film can cause the decline of oil pressure in barrier film oil pocket 6 when occurring abnormal in reality, the oil pressure that now the first pressure transducer 14 detects will be less than 2700kpa, when the feed check valve in membrane pump or discharging check valve occur extremely as punctured, oil pressure in barrier film oil pocket will be greater than 2900kpa, general most at more than 3000kpa. therefore no matter membrane pump to single cylinder, twin-tub, triplex or multi-cylinder, by the oil pressure in barrier film oil pocket is carried out sensing detection, can know whether the common easily worn parts such as the barrier film in membrane pump, piston, check valve are in abnormal operation accurately, greatly reduce the membrane pump damage probability caused by the operation irregularity of these easily worn parts, it is achieved that the automatic protection functions of membrane pump.
Mode two: be provided with the second pressure transducer 19 on described first gas regulator 18, described second gas regulator 23 is provided with the 3rd pressure transducer 24, slurry body is carried out damping by the pressure dynamic equilibrium between gas and slurry by gas regulator described above, therefore the second pressure transducer 19 can indirectly monitor the pressure of slurry in pumping outlet conduit 17, 3rd pressure transducer 24 can indirectly monitor the pressure of slurry in pumping inlet duct 22, the data output end of described second pressure transducer 19 and the 3rd pressure transducer 24 is connected to the control unit of membrane pump, when the pressure that the second pressure transducer 19 and/or the 3rd pressure transducer 24 monitor is in non-normal working scope, described control unit controls membrane pump autostop, realize automatic protection functions, preferably in described control unit, it is provided with automatic protection module, slurry pressure range in the pumping inlet duct 22 that slurry pressure range in the pumping outlet conduit 17 that when storage has a membrane pump normal operation in described automatic protection module, the second pressure transducer 19 should sense and the 3rd pressure transducer 24 should sense, preferred described normal pressure scope is in 800-1000kpa. described automatic protection module has and compares to determine function, by comparing the second pressure transducer 19 or pressure value that the 3rd pressure transducer 24 detects and relation between the corresponding normal pressure scope 800-1000kpa of storage in it, whether membrane pump described in automatic decision there is exception, and controls membrane pump autostop when an exception occurs. in reality when the feed check valve in membrane pump or discharging check valve occur extremely as punctured, the change of slurry pipeline steel pressure in pumping inlet duct or pumping outlet conduit will be caused, so that the pressure value deviation critical field that described 3rd pressure transducer 24 or the second pressure transducer 19 monitor, if in most cases feed check valve or discharging check valve are breakdown, the pressure that 3rd pressure transducer 24 or the second pressure transducer 19 monitor can exceed 1000kpa, it is typically in more than 1200kpa, described automatic protection module may determine that check valve generation exception accordingly and controls membrane pump autostop. therefore whether the check valve by being monitored knowing in membrane pump accurately to the slurry pressure in membrane pump input and output material pipeline occurs common to puncture exception, greatly reduce and punctured the membrane pump damage probability caused by check valve, it is achieved that the automatic protection functions of membrane pump.
Mode three: on described membrane pump can it is preferred that arrange jig frequency detection sensor 25, described jig frequency detection sensor 25 is for monitoring the jig frequency number of piston rod in unit interval inner septum pump, the data output end of described jig frequency detection sensor 25 is connected to the control unit of membrane pump, when the jig frequency that jig frequency detects the piston rod that sensor 25 detects is in non-normal working scope, described control unit controls membrane pump autostop, it is achieved automatically protect purpose. preferably in described control unit, it is provided with automatic protection module, described automatic protection module stores the normal jig frequency number at various pump speed condition lower piston rods when having membrane pump normal operation, described automatic protection module has and compares to determine function, by comparing the relation between jig frequency number and the standard flush scope stored in it that jig frequency detection sensor 25 detects, whether membrane pump described in automatic decision there is exception, and control membrane pump autostop when an exception occurs, reality all can cause the jig frequency number deviation critical field of piston rod when the check valve of membrane pump or barrier film etc. occur abnormal, such as under normal circumstances pump speed 89% time corresponding standard jig frequency number be 44 times, when feed check valve or discharging check valve breakdown after, the jig frequency of piston rod is up to about 50 times, when this jig frequency is monitored by jig frequency detection sensor 25 and is transferred to automatic protection module, automatic protection module judges check valve generation exception accordingly and controls membrane pump autostop. jig frequency detection sensor 25 preferably can be arranged in power transfer unit, as being arranged on eccentric mechanism, the detection of jig frequency can be carried out by it according to all numbers of rotation eccentric in the unit interval, because eccentric each rotation is corresponding to a jig frequency of piston rod, non-return valve operational is once simultaneously, therefore when the words that individual event valve is breakdown at work will cause that the jig frequency of piston cylinder changes. therefore by the jig frequency of piston rod is carried out sensing detection, can know whether the common easily worn parts such as the barrier film in membrane pump, check valve are in abnormal operation accurately, greatly reduce the membrane pump damage probability caused by the operation irregularity of these easily worn parts, it is achieved that the automatic protection functions of membrane pump.
Setting and three kinds of automatic protected modes of membrane pump of the sensing detection component of above-mentioned three types provided by the present invention can select in actual use flexibly; can select to arrange one of which sensor in membrane pump; three kinds of sensors also can be set in a membrane pump simultaneously; and detect the duty of membrane pump based on above-mentioned three kinds of modes simultaneously; whether the easily worn part to judge membrane pump accurately breaks down; improve to greatest extent its service life, and then improve the work efficiency of membrane pump.
The present invention is by parameters such as the monitoring pressure of membrane pump, jig frequencies in real time; and it is abnormal normal to judge whether the common easily worn parts such as the barrier film of membrane pump, check valve, piston occur accurately by pressure, the isoparametric change of jig frequency; thus being effectively protected all parts of membrane pump; improve cycle in service life and the work efficiency of membrane pump to greatest extent, significantly reduce the maintenance cost of membrane pump.
Below it is only that the preferred embodiment of the present invention is described; technical scheme is not limited to this; the any known deformation that those skilled in the art make on the basis that the major technique of the present invention is conceived broadly falls into the claimed technology category of the present invention, and the protection domain that the present invention is concrete is as the criterion with the record of claims.
Claims (10)
1. a membrane pump with automatic protection functions, including: Poewr transmission mechanism, piston rod (4), piston cylinder (5), barrier film oil pocket (6), barrier film (10), chamber of septum (11), outlet valve chamber (15), discharging check valve (16), pumping outlet conduit (17), entrance valve chamber (20), feed check valve (21) and pumping inlet duct (22), described Poewr transmission mechanism is connected to described piston rod (4), described piston rod (4) telescopic moving in described piston cylinder (5), described piston cylinder (5) is connected with described barrier film oil pocket (6), it is filled with hydraulic oil in described barrier film oil pocket (6), described barrier film oil pocket (6) is isolated by described barrier film (10) with described chamber of septum (11), the discharging opening of described chamber of septum (11) is connected to described outlet valve chamber (15), described discharging check valve (16) is arranged in described outlet valve chamber (15), the discharging opening of described outlet valve chamber (15) is connected to described pumping outlet conduit (17), the charging aperture of described chamber of septum (11) is connected to described entrance valve chamber (20), described feed check valve (21) is arranged in described entrance valve chamber (20), the charging aperture of described entrance valve chamber (20) is connected to described pumping inlet duct (22), it is characterized in that, also include control unit and the following sensor of at least one: be used for monitoring first pressure transducer (14) of barrier film oil pocket (6) interior oil pressure, for monitoring second pressure transducer (19) of pumping outlet conduit (17) interior slurry pressure, for monitoring the 3rd pressure transducer (24) of pumping inlet duct (22) interior slurry pressure, jig frequency for monitoring piston jig frequency detects sensor (25), described control unit is connected to described sensor and sensor-based Monitoring Data protects the operation of membrane pump automatically.
2. membrane pump according to claim 1, it is characterized in that, described first pressure transducer (14) is arranged at and connects on described barrier film oil pocket (6) inside and the pipeline with needle valve (13), the data output end of described first pressure transducer (14) is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard operating oil pressure within barrier film oil pocket when having membrane pump normal operation, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between oil pressure numerical value and the described standard operating oil pressure that the first pressure transducer (14) monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
3. membrane pump according to claim 2; it is characterized in that; in described automatic protection module, the standard operating oil pressure of storage is 2700-2900kpa; when the oil pressure numerical value that the first pressure transducer (14) monitors is less than 2700kpa or more than 2900kpa, described automatic protection module controls membrane pump autostop.
4. membrane pump according to claim 1, it is characterized in that, described pumping outlet conduit (17) is provided with the first gas regulator (18), described second pressure transducer (19) is arranged on described first gas regulator (18), and monitor the slurry pressure in pumping outlet conduit (17) based on the dynamic equilibrium between the slurry pressure in the gas pressure intensity in the first gas regulator and pumping outlet conduit (17), the data output end of described second pressure transducer (19) is connected to described control unit, described control unit is provided with automatic protection module, the standard slurry pressure stored when having membrane pump normal operation in pumping outlet conduit (17) in described automatic protection module, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between slurry pressure value and the described standard slurry pressure that the second pressure transducer (19) monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
5. membrane pump according to claim 1, it is characterized in that, described pumping inlet duct (22) is provided with the second gas regulator (23), described 3rd pressure transducer (24) is arranged on described second gas regulator (23), and monitor the slurry pressure in pumping inlet duct (22) based on the dynamic equilibrium between the slurry pressure in the gas pressure intensity in the second gas regulator and pumping inlet duct (22), the data output end of described 3rd pressure transducer (24) is connected to described control unit, described control unit is provided with automatic protection module, the standard slurry pressure stored when having membrane pump normal operation in pumping inlet duct (22) in described automatic protection module, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between slurry pressure value and the described standard slurry pressure that the 3rd pressure transducer (24) monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
6. the membrane pump according to claim 4 or 5; it is characterized in that; in described automatic protection module, the standard slurry pressure of storage is 800-1000kpa; when the slurry pressure that the second pressure transducer (19) or the 3rd pressure transducer (24) monitor is less than 800kpa or more than 1000kpa, described automatic protection module controls membrane pump autostop.
7. membrane pump according to claim 1, it is characterized in that, described jig frequency detection sensor (25) is arranged in described Poewr transmission mechanism, and based on the jig frequency of the crank rotation cycle monitoring piston in Poewr transmission mechanism, the data output end of described jig frequency detection sensor (25) is connected to described control unit, described control unit is provided with automatic protection module, described automatic protection module stores the standard piston jig frequency that when having membrane pump normal operation, various pump speed conditions are corresponding, described automatic protection module has and compares to determine function simultaneously, by comparing the relation between piston jig frequency number and the described standard piston jig frequency that jig frequency detection sensor (25) monitors, automatically judge whether the operation of described membrane pump exception occurs, and control membrane pump autostop when an exception occurs.
8. membrane pump according to claim 1; it is characterized in that; described membrane pump includes described first pressure transducer (14), the second pressure transducer (19), the 3rd pressure transducer (24) and jig frequency detection sensor (25) simultaneously; described control unit is simultaneously coupled to each sensor, and automatically protects the operation of membrane pump based on the Monitoring Data of each sensor.
9. membrane pump according to claim 1, it is characterized in that, described Poewr transmission mechanism includes eccentric (1), connecting rod (2) and crosshead (3), described eccentric (1) is connected to connecting rod (2), described connecting rod (2) is movably connected on one end of described crosshead (3), and the other end of described crosshead (3) is connected to described piston rod (4); Being provided with detection bar (9) on described barrier film (10), described barrier film oil pocket (6) position corresponding with described detection bar (9) is provided with drain cock (7) and repairing switchs (8), and described chamber of septum (11) is by barrier film gland (12) closing.
10. the membrane pump automatic protecting method carried out based on membrane pump described in any one of claim 1-9, it is characterised in that at least one of comprise the following steps:
Step one, read the oil pressure numerical value in the barrier film oil pocket (6) that described first pressure transducer (14) monitors by control unit, when the standard operating oil pressure range of storage in described oil pressure numerical value deviation control unit, described control unit control membrane pump autostop;
Step 2, read the slurry pressure value in the pumping outlet conduit (17) that described second pressure transducer (19) monitors by control unit, when the standard slurry pressure range of storage in described slurry pressure value deviation control unit, described control unit control membrane pump autostop;
Step 3, read the slurry pressure value in the pumping inlet duct (22) that described 3rd pressure transducer (24) monitors by control unit, when the standard slurry pressure range of storage in described slurry pressure value deviation control unit, described control unit control membrane pump autostop;
Step 4, read described jig frequency detection sensor (25) the piston jig frequency number that monitors by control unit; when in described piston jig frequency number deviation control unit storage corresponding pump speed when standard piston jig frequency scope time, by described control unit control membrane pump autostop.
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| CN201410387265.1A CN104214078B (en) | 2014-08-08 | 2014-08-08 | A kind of membrane pump with automatic protection functions and automatic protecting method thereof |
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| CN108266357A (en) * | 2017-12-05 | 2018-07-10 | 上海大学 | The remote failure alarm system of pneumatic diaphragm pump based on NB-IOT |
| EP3864226A4 (en) * | 2018-10-10 | 2022-07-06 | Fluid Handling LLC | System condition detection using inlet pressure |
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| CN111911397B (en) * | 2020-07-17 | 2021-08-10 | 西安交通大学 | Piston assembly and application thereof |
| CN111852828A (en) * | 2020-07-23 | 2020-10-30 | 嘉善边锋机械股份有限公司 | Diaphragm pump with pressure real-time monitoring and control functions |
| CN111980890A (en) * | 2020-09-14 | 2020-11-24 | 云南大红山管道有限公司 | Device for preventing damage of water hammer after positive displacement diaphragm pump accident and control method |
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| CN104214078A (en) | 2014-12-17 |
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