CN107435623A

CN107435623A - Membrane pump

Info

Publication number: CN107435623A
Application number: CN201710082470.0A
Authority: CN
Inventors: 竹本博人
Original assignee: Kishu Giken Kogyo Co Ltd
Current assignee: Kishu Giken Kogyo Co Ltd
Priority date: 2016-05-27
Filing date: 2017-02-16
Publication date: 2017-12-05
Anticipated expiration: 2037-02-16
Also published as: CN107435623B; JP2017210941A; JP6425683B2

Abstract

The present invention provides a kind of membrane pump of the excellent simple structure of maintainability.The membrane pump of the present invention is characterised by, is unit by other part integrations in addition to the piston drive mechanism for the piston-advance for making to be installed on barrier film.Also, diaphragm cell by be provided with chamber of septum, ingress port, outlet port etc. unit main body and by piston can relative to unit main body it is freely reciprocating in a manner of the piston support member (6) that is supported to piston formed.And then the damping mechanism that retreats piston using the bounce of compression helical spring and independently suck from ingress port the rising for suppressing pressure when the autonomous sucker mechanism of liquid and pressure rise of the bounce in chamber of septum using compression helical spring is being installed in piston support member.

Description

Membrane pump

Technical field

The present invention relates to the membrane pump of the conveying for liquid such as ink.

Background technology

Membrane pump is one kind of volume conveying-type pump, combines the reciprocal fortune of the barrier film formed by the film of rubber system or resin-made Move with check-valves to convey liquid.

In membrane pump, because the liquid for being drawn into chamber of septum must be discharged from chamber of septum, so no matter the pipe arrangement of discharge side Why reason blocking is planted, as long as pump work, pressure can all continue to raise, and therefore, breakage occurs for barrier film or constituent parts.

It is automatic to discharge caused excessive pressure in chamber of septum in discharge side line installation safety valve in order to avoid the breakage, So as to prevent that constituent parts is damaged.But the reason for maximization for being mounted for pump of safety valve, cost rise, and then, knot Structure becomes complicated and maintainability is produced problem.

Therefore, present applicant has proposed suppress to put on the damping machine of the pressure rising of chamber of septum using compression helical spring Structure replaces safety valve (with reference to patent document 1).

Membrane pump described in patent document 1 is accommodated with the drive for making reciprocating motion of the pistons in the inside of the housing of rectangular-shape Motivation structure.Also, drive mechanism is used, it is scalable to make to be installed on the volume of chamber of septum in the unit of left and right side, will be from suction The liquid that side ports flow into is sent out from outlet port.

In membrane pump described in patent document 1, the drive mechanism with making reciprocating motion of the pistons is set up in parallel compression spiral Spring, when the pressure of barrier film pump chamber raises because of some reasons, the pressure for putting on drive mechanism is absorbed by compression helical spring, Thus prevent the constituent parts of drive mechanism from breakage occurs.

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2014-47624 publications

The content of the invention

But because the damping mechanism described in patent document 1 is set up in parallel with drive mechanism, so becoming multiple in structure It is miscellaneous, safeguard and check spending the time, it is therefore desirable to improve to it.

The present invention be in view of such a situation and complete, it is therefore an objective to a kind of excellent simple structure of maintainability is provided Membrane pump.

To achieve these goals, membrane pump involved in the present invention is characterised by, including：

Diaphragm cell, the diaphragm cell has the chamber of septum that volume expands and reduced with the deformation of barrier film, and leads to Cross the reciprocating motion for the piston for being installed on the barrier film and make volume enlargement and the diminution of the chamber of septum, will be inhaled from ingress port The liquid entered is discharged from outlet port, and

Piston drive mechanism, the piston drive mechanism are configured to separate with the diaphragm cell, make the piston with certain Cycle advance,

The diaphragm cell is made up of unit main body and piston support member,

The unit main body be provided with by the chamber of septum, ingress port, outlet port and the chamber of septum with it is described each The stream of port connection,

The piston support member by the piston can relative to the unit main body it is freely reciprocating in a manner of pair The piston is supported,

Autonomous sucker mechanism and damping mechanism are installed in the piston support member,

The autonomous sucker mechanism retreats the piston using the bounce of compression helical spring, and from the arrival end Mouth independently sucks liquid,

The damping mechanism using compression helical spring pressure rise of the bounce in the chamber of septum when suppress pressure The rising of power.

Herein, it is preferably, the piston support member possesses columned sleeve, at the center of the columned sleeve Portion formed with by the piston can slidably in a manner of the hole that is supported to the piston, and the columned sleeve By can slidably in a manner of be supported in the cylindric opening portion formed in the unit main body.

Additionally, it is preferred that being, the autonomous sucker mechanism is made up of the first compression helical spring and the first block, described first Compression helical spring exerts a force along the direction for leaving the unit main body to the sleeve, and first block prevents described Sleeve is leapt up out.

Preferably, the damping mechanism is made up of the second compression helical spring and the second block, the second compression spiral Spring exerts a force along the direction for leaving the sleeve to the piston, and second block limits the piston relative to institute State the moving range of sleeve.

Preferably, as first and second described compression helical spring, waveform compression helical spring is used.

Additionally, it is preferred that being, the unit main body is made up of predecessor and rear body,

The predecessor is also formed with the arrival end formed with the recess that the chamber of septum together delimited with the barrier film Mouth, outlet port and stream,

Body and the predecessor together clamp the periphery of the barrier film after described, and by the barrier film be fixed on it is described before Body,

Being formed in the rear body of the unit main body has the cylindric opening portion.

Preferably, as the piston drive mechanism, the eccentric cam for the rotary shaft for being installed on motor is used.

Additionally, it is preferred that be, the ingress port and outlet port possess the joint handling of the joint of handling pipeline connection Mechanism,

The joint charging crane is made up of slit, the groove of ring-type and fixture,

The slit is formed at the ingress port or outlet port,

The groove of the ring-type be formed at the joint, be inserted in the cylindrical portion of the ingress port or outlet port it is outer Week,

In the front end of the fixture formed with a pair of pawls,

A pair of pawls of the fixture are inserted in the slit and a pair of pawls is sticked in the cylindrical portion of the joint Groove, thus, the joint is installed on the ingress port or outlet port.

In membrane pump involved in the present invention, the unit of liquid conveying, the situation that unit breaks down will be carried out Under, by change unit can task again at once, therefore, maintainability is greatly improved.Further, since by piston-driven machine Structure is configured to separate with unit, so the structure of pump is simplified and maintenance and inspection is become easy, additionally it is possible to reduce cost.

Brief description of the drawings

Fig. 1 is the stereogram for the outward appearance for representing the membrane pump involved by embodiments of the present invention.

Fig. 2A is the front view of the diaphragm cell shown in Fig. 1, and Fig. 2 B are side views, and Fig. 2 C are stereograms.

Fig. 3 is with sectional view obtained from the line A-A cut-out of the diaphragm cell shown in Fig. 2A.

Fig. 4 is the top view of the membrane pump shown in Fig. 1.

Fig. 5 is with sectional view obtained from the line B-B cut-out of the membrane pump shown in Fig. 4.

Fig. 6 is the sectional view (its 1) that the action to the diaphragm cell involved by present embodiment illustrates.

Fig. 7 is the sectional view (its 2) that the action to the diaphragm cell involved by present embodiment illustrates.

Fig. 8 is the sectional view (its 3) that the action to the diaphragm cell involved by present embodiment illustrates.

Fig. 9 A, Fig. 9 B, Fig. 9 C are that the action to the joint charging crane of the diaphragm cell involved by present embodiment is carried out The stereogram of explanation.

Symbol description：

1- diaphragm cells；2- predecessor；Body after 3-；4- barrier films；5- pistons；6- piston support members；7a, 7b- joint；8a、 8b- check-valves；10- membrane pumps；11- housings；12- piston drive mechanisms；21- chamber of septum；22nd, 24- streams；23- ingress ports； 25- outlet ports；31st, 68- opening portions；32- bushings；33- resinous coats；34- is padded；41- flange parts；51st, 66- flanges；52、 69- lids；53rd, 54- tapping screws；61- sleeves；62nd, 64- compression helical springs；63- pistons stops；65- packing rings；67、73- Groove；71- cylindrical portions；72- pipe connection portions；74- fixtures；81st, the unidirectional vavle shelves of 82-；83- steel balls；84th, 85-O shapes ring；111- sides Plate；112- foreboards；113- backboards；121- motors；122- gearboxes；123- rotating shafts；126- bearings；127- eccentric cams；128- Bearing.

Embodiment

Hereinafter, referring to the drawings, the membrane pump involved by embodiments of the present invention is illustrated.

The composition ＞ of ＜ membrane pumps

Membrane pump involved by present embodiment is characterised by, except the piston for the piston-advance for making to be installed on barrier film drives It is unit by other part integrations beyond motivation structure.

The outward appearance of the membrane pump involved by present embodiment is provided in Fig. 1.In membrane pump 10 described in Fig. 1, it will put down A pair of side plates 111, foreboard 112 and the backboard 113 of tabular are assembled into opposed in hollow housing 11 obtained from rectangular-shape Each installation 2 adds up to 4 diaphragm cells 1 (hereinafter simply referred to as " unit ") on side plate 111,111.

The premise of membrane pump 10 involved by present embodiment is in the continuation mode described in foregoing patent document 1 It is used to ink in ink-jet printer convey.Also, the ink that 4 units 1 are respectively used to reclaim in discharge groove is transported to ink Tank, solvent is transported to ink tank, ink is conveyed from ink tank to printhead and ink is stirred in ink tank from solvent tank.

The driving source that is, motor of piston drive mechanism 12 are installed on the foreboard 112 of housing 11 across gearbox 122 121.In addition, the rotating shaft of motor 121 is installed between foreboard 112 and backboard 113 in a manner of the hollow bulb through housing 11 (rotary shaft) 123.

As described later, 4 core shift cams of the piston-advance for making 4 units 1 are installed in the rotating shaft 123 of motor, partially Core cam rotates with the rotation of motor 121, so that the piston of each unit 1 is advanced with certain cycle, in each unit 1 Carry out liquid conveying.Hereinafter, using Fig. 2A, Fig. 2 B, Fig. 2 C and Fig. 3, the composition and function of unit 1 are illustrated.

The composition and function ＞ of ＜ units

Fig. 2A~Fig. 2 C represent the outward appearance of the unit 1 in present embodiment, and Fig. 2A is front view, and Fig. 2 B are side views, figure 2C is stereogram.In addition, Fig. 3 is sectional view obtained from the unit 1 shown in Fig. 2A is cut off with line A-A.

Unit 1 by unit main body and by piston 5 can relative to unit main body it is freely reciprocating in a manner of piston 5 is entered The piston support member 6 of row support is formed, wherein, the unit main body is made up of predecessor 2 and rear body 3.

In addition, as described later, be provided with piston support member 6 makes piston 5 using the bounce of compression helical spring Retreat and independently suck from ingress port 23 liquid autonomous sucker mechanism and utilization compression helical spring bounce every Suppress the damping mechanism of the rising of pressure during pressure rise in film room 21.

As shown in figure 3, using synthetic resin injection moulding make predecessor 2 central portion, formed with barrier film 4 one With the recess for delimiting chamber of septum 21.Chamber of septum 21 is connected by stream 22 with ingress port 23, in addition, by stream 24 and outlet Port 25 connects.

The pipeline (not shown) for connecting fluid conveying is separately installed with ingress port 23 and outlet port 25 Joint 7a, 7b.Joint 7a, 7b simply can be installed and removed in port by charging crane described later.

The central portion of the rear body 3 of zinc is being cast formed with the component parts that is, sleeve 61 for inserting piston support member 6 Cylindric opening portion 31, the bushing 32 made by metal of cylindrical shape is embedded with opening portion 31.The inner surface quilt of bushing 32 Resinous coat 33 covers, by columned sleeve 61 can slidably in a manner of columned sleeve 61 is supported.

Body 3 after being fixed using the state of body 3 after bolt and nut and the periphery of the clamping barrier film 4 of predecessor 2.It should say Bright, the in general retention mechanism such as the bolt that is provided in figure, nut is illustrated without especially assigning symbol.Similarly later.

It should illustrate, in present embodiment, in order to ensure intensity and dimensional accuracy, body 3 after being made of casting zinc, but it is possible to In the case of enough ensuring necessary intensity, predecessor 2 and rear body 3 can also be integrally formed using same resin material, are used as Unit main body.

Barrier film 4 is made up of discoideus rubber, in hole of the central part formed with insertion piston 5, in periphery with ring-type Into the flange part 41 of heavy wall.Flange part 41 is clamped with predecessor 2 and rear body 3, thus, the periphery of barrier film 4 is relative to the quilt of predecessor 2 It is fixed.

In the flange of front portion (being left side towards paper) formed with ring-type of the columned piston 5 made of synthetic resin 51.It is being formed in the hole of central part of barrier film 4 in the state of the leading section inserted with piston 5, barrier film 4 is used into the convex of piston 5 Edge 51 and discoideus lid 52 clamp, and are fixed using tapping screw 53.

Barrier film 4 is integrally formed with piston 5 in the state of being clamped with the flange 51 of piston 5 and lid 52 and moved, because This, if piston 5 moves back and forth in the longitudinal direction, barrier film 4 is deformed therewith.When piston 5 retreats (towards paper to the right When Fang Yidong), the volume enlargement of chamber of septum 21；When piston 5 advances and (moved to the left towards paper), the volume of chamber of septum 21 Reduce.

Be configured with check-valves 8a on stream 22 between ingress port 23 and chamber of septum 21, in addition, chamber of septum 21 with Check-valves 8b is configured with stream 24 between outlet port 25.Check-valves 8a, 8b have identical structure, are passing through cylindrical shape Unidirectional vavle shelf 81,82 formed hollow bulb in be accommodated with steel ball 83 and O-ring 84.

If piston 5 retreats and (moved to the right) volume enlargement for causing chamber of septum 21, the pressure drop in chamber of septum 21 It is low, press on O-ring 84 so as to check-valves 8b steel ball 83 and close valve.On the other hand, check-valves 8a steel ball 83 is upward Fang Yidong and open valve, from ingress port 23 suck liquid pass through stream 22 flow into chamber of septum 21.

On the other hand, if piston 5, which advances and (moved to the left), causes the smaller volume of chamber of septum 21, in chamber of septum 21 Pressure increase, check-valves 8a steel ball 83 presses on O-ring 84 and closes valve.On the other hand, check-valves 8b steel ball 83 It is moved upward and opens valve, fluid is discharged from outlet port 25 to outside.Moved left and right like this by piston 5, and from Ingress port 23 sucks liquid, and liquid is discharged from outlet port 25.

Next, the autonomous sucker mechanism of liquid is independently sucked from ingress port 23 and in chamber of septum 21 to being provided with The piston support member 6 for suppressing the damping mechanism of the rising of pressure when pressure anomaly raises illustrates.Piston support member 6 by Sleeve 61, the compression helical spring 62 for realizing autonomous sucker mechanism and pistons stops 63 and the compression spiral shell for realizing damping mechanism Rotation spring 64 and packing ring 65 are formed.

In present embodiment, as compression helical spring 62,64, waveform compression helical spring is used.Waveform compression spiral Spring can produce equal exacerbation with the approximately half of height of in general compression helical spring, therefore, it is possible to realize light weight And compact piston supporting mechanism 6.

First, autonomous sucker mechanism is illustrated.Ring-type has been the peripherally inserted in the cylindric opening portion 31 of rear body 3 Pad 34 and compression helical spring 62.The front end of compression helical spring 62 contacts with pad 34, and rear end is with being formed at sleeve 61 The flange 66 of rear end contact.

Sleeve 61 is exerted a force along the direction for leaving rear body 3 by the bounce of compression helical spring 62, the opposing party Face, when unit 1 is unloaded from housing 11, the state that certain intervals are kept with rear body 3 is remained by pistons stops 63, with Just prevent sleeve 61 from leaping up out and deforming barrier film 4.

Pistons stops 63 are obtained from carrying out punch process to metallic plate, as shown in Fig. 2A~Fig. 2 C, have to surround and live Fill in shape as support member 6, the pawl 631 in side of the left and right front end formed with body after being locked to 3, at rear portion formed with confession The opening 632 that lid 69 passes through.In the state of compression helical spring 62 is compressed, by the pawl 631 of the left and right of pistons stops 63 The side of rear body 3 is locked to, thus, remains the state that certain intervals are kept with rear body 3.

Next, damping mechanism is illustrated.As described above, columned sleeve 61 central part formed with circle The piston 5 of column can be slidably the hole that is supported to columned piston 5 of mode.In addition, in the front side of sleeve 61 The groove 67 of (side of barrier film 4) formed with cylindrical shape, and compression helical spring 64 is accommodated with herein.

As shown in figure 3, the leading section of compression helical spring 64 contacts with the flange 51 of piston 5.On the other hand, in piston 5 Rear end be fixed with packing ring 65 using tapping screw 54, the front portion of packing ring 65 and the rear end in contact of sleeve 61.

Packing ring 65 plays the function as block, and in the state of compression helical spring 64 is compressed, packing ring 65 is fixed In the rear end of piston 5, thus, piston 5 is exerted a force along the direction for leaving sleeve 61, and utilizes block (packing ring 65) limitation Moving range, remain the state that certain intervals are kept with sleeve 61.

It should illustrate, in the rear end of sleeve 61 formed with columned opening portion 68, be embedded with its opening portion 68 The lid 69 of round-ended cylinder type.

Finally, water leakage detection sensor 9 is illustrated.As shown in Fig. 2A~Fig. 2 C and Fig. 3, with by predecessor 2 and rear body 3 The mode of clamping is provided with water leakage detection sensor 9.

Water leakage detection sensor 9 is to form couple of conductor and except leading in the one side of the flexible printed board of strip The both ends of line with external application insulating properties it is resin-coated obtained from, barrier film it is damaged cause liquid leakage to chamber of septum 21 it Outside, when and liquid is attached to the front end of wire and causes short-circuit between conductors, detected with short circuit detector (not shown).

Short circuit detector (not shown) lights emergency warning lamp based on the short-circuit signal detected, or sends police from loudspeaker Announcement sound, to inform that operator's barrier film 4 is damaged.Learn that the damaged operator of barrier film 4 stops motor 121 by emergency warning lamp or warning And stop the work of pump 10.After operator changes barrier film 4, make the task again of pump 10.

Next, with reference to foregoing Fig. 1 and Fig. 4 and Fig. 5, the composition and function of piston drive mechanism 12 are said It is bright.Piston drive mechanism 12 is the mechanism for the forward travel that the rotary motion of motor 121 is converted to piston 5.Fig. 4 is membrane pump 10 top view, Fig. 5 are sectional views obtained from the membrane pump 10 shown in Fig. 4 is cut off with line B-B.

As described above, the membrane pump 10 involved by present embodiment is configured to drive 4 units 1 simultaneously, in housing 11 2 units 1 are respectively installed on pair of right and left side plate 111, this 4 units 1 are driven using 1 drive mechanism 12.

As shown in figure 4, being provided with motor 121 across gearbox 122 on foreboard 112, the rotation of motor 121 is by gearbox Rotating shaft 123 is delivered to after 122 decelerations.

The other end of rotating shaft 123 is supported by bearing 126, and bearing 126 is fixed on backboard 113 using Screw (not shown). It should illustrate, the rotating shaft 114 shown in Fig. 4 is the reinforcing member of housing 11, and foreboard 112 and backboard 113 are screwed, thus, Increase the intensity of housing 11.

In present embodiment, as motor 121, using the motor of the larger outer-rotor type of driving torque.It should illustrate, The flat printed base plate 124 for the coil for being configured with driving is provided between motor 121 and gearbox 122, in printing base A part for plate is provided with heat sink 125.

4 eccentric cams 127 for making the respective piston 5 of 4 units 1 advance are installed in rotating shaft 123.As shown in figure 5, Eccentric cam 127 is fixed with the peripheral part of rotating shaft 123, and then, three-decker is installed in the peripheral part of eccentric cam 127 Bearing 128.

If motor 121 rotates, rotating shaft 123 and eccentric cam 127 are also rotated.Bearing 128 be arranged at to list The position that the lid 69 that the rear of member 1 protrudes contacts, if rotating shaft 123 rotates to the direction shown in arrow, eccentric cam 127 Rotary motion the forward travel of piston 5 is converted to by bearing 128, reciprocating motion is repeated in the piston 5 of each unit 1.

As described above, being provided with autonomous sucker mechanism in the piston support member 6 of each unit 1, contacted when with lid 69 Position when being retreated with the rotation of eccentric cam 127, piston 5 is retreated by the bounce of compression helical spring 62, is returned The maximum position of position shown in Fig. 3, the i.e. volume of chamber of septum 21 is back to, liquid is independently sucked from ingress port 23.

It should illustrate, consider the sticky degree of conveyed liquid to determine the intensity of compression helical spring 62.Conveying is viscous Property high liquid in the case of, if the intensity of not corresponding increase compression helical spring 62, the conveying of liquid can be made Into obstruction.

In addition, in membrane pump 10 involved by present embodiment, 4 eccentric cams, the 127 respective phase of rotating shaft 123 is installed on Dislocation opens 90 degree, by the vibration suppression occurred by the rotation of eccentric cam 127 to Min..

The action ＞ of ＜ units

Next, 6~Fig. 8 of reference picture, the action to unit 1 illustrates.First, based on Fig. 6, to reducing chamber of septum 21 And from outlet port 25 discharge liquid when action illustrate.

Fig. 6 represent foregoing Fig. 3 chamber of septum 21, stream 22,24, ingress port 23, outlet port 25 and joint 7a, In the state of being full of by liquid L in 7b, piston 5 advance before state.

The sleeve 61 of piston holding member 6 is remained with after by the action of compression helical spring 62 and pistons stops 63 The state spaced apart of body 3, in addition, piston 5 is kept by the action of compression helical spring 64 and block (packing ring 65) For the state spaced apart with sleeve 61.

Lid 69 is pushed by the direction shown in the action along arrow A of eccentric cam 127, it is living when sleeve 61 advances Plug 5 advances therewith, the pressure rise of chamber of septum 21.With the pressure rise of chamber of septum 21, check-valves 8b steel ball 83 is pushed to Top, as shown by arrows, the liquid L in chamber of septum 21 are pressed to outlet port 25.

Represented in Fig. 7 before piston 5 and then make the minimum state of the volume of chamber of septum 21.In this condition, can be in sleeve Gap is formed between 61 rear end and pistons stops 63.Then, the contact position with lid 69 is with the rotation of eccentric cam 127 And retreat, when the power for pushing lid 69 dies down, sleeve 61 and piston 5 are by the bounce of compression helical spring 62 and to arrow Direction shown in B retreats, and the pressure in chamber of septum 21 reduces.

When the pressure in chamber of septum 21 reduces, check-valves 8a steel ball 83 is pushed to top, as shown by arrows, arrival end Liquid L in mouth 23 is inhaled into chamber of septum 21.

By the way that the action shown in Fig. 6 and Fig. 7 is repeated, and make volume enlargement and the diminution of chamber of septum 21, via joint 7a is sent to outside from outlet port 25 from the outside liquid L for flowing into ingress port 23 via joint 7b.

Next, based on the accompanying drawing shown in Fig. 8, pair pipeline being connected with outlet port 25 (not shown) because of certain reason and The action of the situation of blocking illustrates.In this condition, it also can continue to make liquid L from suction by the reciprocating motion of piston 5 Draw side ports 23 and flow into chamber of septum 21.

But it can not be carried out liquid due to the line clogging being connected with outlet port 25 from chamber of septum 21 towards outlet Port 25 conveys, so the pressure of chamber of septum 21 gradually rises.

If the pressure of chamber of septum 21 exceedes certain value, as shown in figure 8, even if sleeve 61 is with eccentric cam 127 Rotation and advance, due to compression helical spring 64 by chamber of septum 21 pressure compress, so piston 5 does not also advance.Therefore, no Liquid L in chamber of septum 21 can be expressed into outlet port 25, in addition, liquid L can not flow into from ingress port 23, because This, suppresses the rising of pressure in the state of the volume maximum of chamber of septum 21.

As described above, in membrane pump 10 involved by present embodiment, autonomous sucker mechanism is installed on the unit 1, thus, By the functional specification of piston drive mechanism 12 in the function of making piston advance with certain cycle.That is, piston drive mechanism 12 is made Function it is special turn to push lid 69 function, thereby, it is possible to which piston drive mechanism 12 is separated from unit 1, knot Fruit, can simplify the structure of membrane pump and cost of implementation reduces.

And then damping mechanism is installed in piston support member 6, hereby it is achieved that the function same with foregoing safety valve, Pressure by suppressing chamber of septum 21 rises to prevent barrier film 4 and other constituent parts damaged.

The charging crane ＞ of ＜ ports

Next, reference picture 9A~Fig. 9 C, butt joint 7a, 7b charging crane illustrate.By joint charging crane, Installation on ingress port 23 and outlet port 25 of joint 7a, 7b can simply be carried out and unloaded.

The process that joint 7b is installed on to outlet side port 25 is provided in Fig. 9 A~Fig. 9 C.It should illustrate, say for convenience It is bright, compared with the joint geometry shown in Fig. 2A~Fig. 2 C, joint 7b shape has been made into some changes.

As shown in Figure 9 A, joint 7b is by the cylindrical portion 71 for being inserted in outlet port 25 and the pipeline for installing liquid conveying Pipe installing portion 72 is formed, and cylindrical portion 71 and Pipe installing portion 72 are orthogonal, internally formed with the stream passed through for liquid. And then in groove 73 of the periphery of cylindrical portion 71 formed with ring-type.On the other hand, the corresponding position of outlet port 25 formed with A pair of slits 26.

Fixture 74 is the part for joint 7b cylindrical portion 71 to be installed on to outlet port 25, is being bent into L-shaped Plate-shaped member front end, a pair of pawls 741 formed with the groove 73 for being embedded in joint 7b, the width ratio of fixture 74 is formed at outlet The width of the slit 26 of port 25 wants narrow some.

In 25 erection joint 7b of outlet port, as shown in Figure 9 B, joint 7b cylindrical portion 71 is inserted in outlet port 25 hollow bulb, make the front end of cylindrical portion 71 and check-valves 8b upper-end contact (reference picture 3).In this condition, cylindrical portion 71 Ring-type groove 73 it is opposed with slit 26.Should illustrate, the O-ring 85 shown in Fig. 3 be used for prevent liquid from outlet port 25 with Spilt between joint 7b.

Next, a pair of pawls 741 of fixture 74 are inserted in slit 26.A pair of pawls 74 that fixture 74 is provided in Fig. 9 C are complete It is inserted in slit 26 and joint 7b is installed on the state of outlet port 25.

As described above, the interval of a pair of pawls 741 of fixture 74 and the width of the groove 73 of joint 7b ring-type are roughly equal, because This, the state that joint 7b is embedded in groove 73 with pawl 741 positions, and is fixed on outlet port 25.In this condition, joint can be made 7b cylindrical portion 71 rotates relative to outlet port 25, therefore, it is possible to freely change the direction in Pipe installing portion 72.

When joint 7b is unloaded from outlet port 25, after extracting fixture 74 from slit 26, by cylindrical portion 71 from going out Mouth takes out in port 25.On installations of the joint 7a on ingress port 23 and unload, also can be by same with joint 7b Step is carried out.

It is as discussed above, in membrane pump involved in the present invention, the pumping section subdivision of liquid conveying will be carried out Change,, being capable of task again at once by changing unit in the case where unit breaks down.Further, since by piston-driven machine Structure is configured to separate with unit, so the structure of pump is simplified and maintenance and inspection is become easy, additionally it is possible to reduce cost.

It should illustrate, in above-mentioned embodiment, as piston drive mechanism, use and be provided with the rotating shaft of motor The mechanism of eccentric cam, but it is not limited to this.As long as piston can be made to advance with certain cycle, cylinder etc. can also be used Other mechanisms.

In addition, in above-mentioned embodiment, to membrane pump to be used as to the defeated of the ink in the ink-jet printer of continuation mode The situation of mechanism is sent to be illustrated, still, the purposes of pump is not limited to this.The low liquid of viscosity, example can be widely used in Such as conveying of ammoniacal liquor, water, medicine liquid.

Claims

A kind of 1. membrane pump, it is characterised in that including：

Diaphragm cell, the diaphragm cell have the chamber of septum that volume expands and reduced with the deformation of barrier film, and pass through peace The reciprocating motion of piston loaded on the barrier film and make volume enlargement and the diminution of the chamber of septum, by what is sucked from ingress port Liquid is discharged from outlet port, and

Piston drive mechanism, the piston drive mechanism are configured to separate with the diaphragm cell, make the piston with certain week Phase advances,

The diaphragm cell is made up of unit main body and piston support member,

The unit main body is provided with the chamber of septum, ingress port, outlet port and the chamber of septum and each port The stream of connection,

The piston support member by the piston can relative to the unit main body it is freely reciprocating in a manner of to described Piston is supported,

Autonomous sucker mechanism and damping mechanism are installed in the piston support member,

The autonomous sucker mechanism retreats the piston using the bounce of compression helical spring, and from the ingress port certainly Liquid is sucked mainly,

The damping mechanism using compression helical spring pressure rise of the bounce in the chamber of septum when suppress pressure Rise.
2. membrane pump according to claim 1, it is characterised in that

The piston support member possesses columned sleeve, the columned sleeve central part formed with the work Plug can be slidably the mode hole that is supported to the piston, and the columned sleeve is with can be slidably Mode is supported in the cylindric opening portion formed in the unit main body.
3. membrane pump according to claim 2, it is characterised in that

The autonomous sucker mechanism is made up of the first compression helical spring and the first block,

First compression helical spring exerts a force along the direction for leaving the unit main body to the sleeve,

First block prevents the sleeve from leaping up out.
4. membrane pump according to claim 2, it is characterised in that

The damping mechanism is made up of the second compression helical spring and the second block,

Second compression helical spring exerts a force along the direction for leaving the sleeve to the piston,

Second block limits moving range of the piston relative to the sleeve.
5. membrane pump according to claim 4, it is characterised in that

As first and second described compression helical spring, waveform compression helical spring is used.
6. membrane pump according to claim 2, it is characterised in that

The unit main body is made up of predecessor and rear body,

The predecessor is also formed with the ingress port, gone out formed with the recess that the chamber of septum together delimited with the barrier film Mouth port and stream,

Body together clamps the periphery of the barrier film with the predecessor after described, and the barrier film is fixed on into the predecessor,

Being formed in the rear body of the unit main body has the cylindric opening portion.
7. membrane pump according to claim 1, it is characterised in that

As the piston drive mechanism, the eccentric cam for the rotary shaft for being installed on motor is used.
8. membrane pump according to claim 1, it is characterised in that

The ingress port and outlet port possess the joint charging crane of the joint of handling pipeline connection,

The joint charging crane is made up of slit, the groove of ring-type and fixture,

The slit is formed at the ingress port or outlet port,

The groove of the ring-type be formed at the joint, be inserted in the periphery of the cylindrical portion of the ingress port or outlet port,

In the front end of the fixture formed with a pair of pawls,

A pair of pawls of the fixture are inserted in the slit, and make a pair of pawls be sticked in the joint cylindrical portion groove, by This, the ingress port or outlet port are installed on by the joint.