CN101509484B - Diaphragm of diaphragm pump and molding technique thereof - Google Patents

Abstract

Translated fromChinese

隔膜泵膜片，包括配装在流体室支架和隔膜室之间的膜片本体，膜片本体与流体室支架相配合的一面为能满足抗压强度的要求的硬改性PP层或硬改性PE层或硬改性PVC层或硬改性PA层；膜片本体与隔膜室相配合的另一面为能满足密封性能要求的软改性PP层或软改性PE层或软改性PVC层或橡胶层。隔膜泵膜片的成型工艺，采用注塑成型或模压成型方式制成第一层膜片，并采用注塑成型方式制成第二层膜片；将第一膜片背面上的三个凸台对准并卡入第二层膜片正面上的三个凹沉台。或将硬改性PP原料或硬改性PVC原料在第一模具中采用注塑成型制成第二层膜片，再将该第二层膜片作为嵌件放入第二模具中，采用注塑成型制成的能满足密封性能要求的第一层膜片。

Diaphragm pump diaphragm, including the diaphragm body fitted between the fluid chamber bracket and the diaphragm chamber, the matching side of the diaphragm body and the fluid chamber bracket is a hard modified PP layer or hard modified PP layer that can meet the requirements of compressive strength PE layer or hard modified PVC layer or hard modified PA layer; the other side of the diaphragm body and the diaphragm chamber is a soft modified PP layer or soft modified PE layer or soft modified PVC that can meet the sealing performance requirements layer or rubber layer. The forming process of the diaphragm pump diaphragm is made of the first layer of diaphragm by injection molding or compression molding, and the second layer of diaphragm is made of injection molding; align the three bosses on the back of the first diaphragm And snap into the three sunken platforms on the front of the second layer of diaphragm. Or use hard-modified PP raw material or hard-modified PVC raw material in the first mold to make the second layer of diaphragm, and then put the second layer of diaphragm into the second mold as an insert, and use injection molding The first layer of diaphragm that can meet the sealing performance requirements.

Description

Diaphragm of diaphragm pump and moulding process thereof

Technical field

The present invention relates to the technical field of water purification machine, particularly diaphragm of diaphragm pump and moulding process thereof with diaphragm pump.

Background technique

Used commercial affairs are with the big flow diaphragm pump of the common supporting use of water purification machine; Because commercial affairs are high with the flow of the relative domestic water purifying machine of water purification machine, average working time every day is also longer.Therefore, the Security and the actual motion life-span of commercial affairs water purification machine also are multiplied thereupon, so just the diaphragm pump as the important core accessory of water purification machine also there has been higher requirement, has been mainly reflected in the sealing of diaphragm pump and higher requirement was arranged on working life.Fig. 1 is a sectional view that is used for the diaphragm pump of reverse osmosis water purification system, and wherein: diaphragm pump A comprises a piston 1, and it is reciprocating that piston 1 is made inbalance wheel assembly 3 drives in the pump chamber 2.Balance wheel assembly 3 is usually by a motoring (not shown in the figures), the exhaust port of diaphragm pump A is extracted water out and is passed through in piston 1 to-and-fro motion from pump chamber 2. in the ordinary course of things, three pistons that separate move simultaneously, constantly from device, draw water, piston 1 is connected withdiaphragm 4,diaphragm 4 is fixing by chamber of septum in the pump chamber 5 and support 6, and there is a flange 4a outer ofdiaphragm 4, and its effect is the sealing pump chamber.

The sealability of diaphragm pump and the folding quality of diaphragm need the material of diaphragm to have better ductility and flexible characteristics simultaneously.And the hydraulic action that bears needs material to have the characteristics of good counter-bending deformability.The diaphragm of diaphragm pump bears the hydraulic action part and all adopts the rubber of homogeneous or rubber-plastics material to make in the market, and obviously, the diaphragm of homogenous material can't satisfy the requirement of above-mentioned that a pair of contradiction simultaneously.As shown in Figure 2, because the sealing of diaphragm pump is to lean on the elasticity of diaphragm to be guaranteed, so require the shore hardness of diaphragm can not be De Taigao, then diaphragm is in operation and is subjected to can becoming under the hydraulic action distortion as shown in the figure for a long time, will under the cross section, formsharp point 4b like this, so just be easy to form fracture port, thereby cause that leaking appears in diaphragm pump, the serious bad defective of decompression at this.Usually the shore hardness that improves diaphragm can avoid diaphragm to be subjected to hydraulic pressure and to be out of shape serious phenomenon, but will descend with regard to the elasticity of diaphragm like this, thereby can cause poor sealing, also can cause the reduction of diaphragm folding quality simultaneously.So present diaphragm pump the unreasonable structure that cause faults such as poor sealing, diaphragm fatigue fracture, diaphragm flexes distortion seriously cause breaking are diaphragm occurs through regular meeting.

Summary of the invention

Technical problem to be solved by this invention is the present situation at prior art, and a kind of diaphragm of diaphragm pump and moulding process thereof that has sealing and compression-resistant structure concurrently is provided; By adopting two-layer coincideing mutually or the fusion structure diaphragm, the first layer diaphragm is a soft material, and to satisfy the sealability requirement of diaphragm pump, second layer diaphragm is a hard material, satisfies the requirement of compressive strength.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: diaphragm of diaphragm pump, comprise the diaphragm body that is fitted between fluid chamber's support and the chamber of septum, wherein: the one side that the diaphragm body matches with the fluid chamber support is hard MODIFIED PP layer or hard modified PE layer or the hard modified PVC layer or the hard modification PA layer of the requirement that can satisfy compressive strength; The another side that the diaphragm body matches with chamber of septum is for satisfying soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or the rubber layer that sealability requires.

Above-mentioned soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or rubber layer constitute the first layer diaphragm, hard MODIFIED PP layer or hard modified PE layer or hard modified PVC layer or hard modification PA layer constitute second layer diaphragm, and, first layer diaphragm and second layer diaphragm are the formation one that closely matches, and have the surface of contact that matches.

Above-mentioned soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or rubber layer constitute the first layer diaphragm, hard MODIFIED PP layer or hard modified PE layer or hard modified PVC layer or hard modification PA layer constitute second layer diaphragm, and, first layer diaphragm and second layer diaphragm be for to make one through quadric injection mould, and have the surface of contact that merges mutually.

Three recessed heavy stands that have on the above-mentioned second layer diaphragm front, three boss that have on the primary diaphragm back side, three boss of primary diaphragm are engaged in three recessed heavy stands of second layer diaphragm.

Be shaped on upwardly extending first all flangings and second all flangings on the above-mentioned first layer diaphragm outer circumferential face, first all flangings and second all flangings constitute the recessed all grooves that are used to snap in Sealing.

Be shaped on the flange that is used to snap in fluid chamber's rack groove a week of downward extension on the above-mentioned second layer diaphragm outer circumferential face; Three locating columns that are used for equipped piston that have on the first layer diaphragm front.

Three boss peripheries are shaped on and are convenient to the diaphragm body along with the flexible circular cone table top of piston vibration on the above-mentioned first layer diaphragm back side.

The moulding process of diaphragm of diaphragm pump, wherein: comprise forming step and equipped step, forming step is:

That adopts that molding and forming or compression molding mode make can satisfy the first layer diaphragm that sealability requires, corresponding specification, and adopt the second layer diaphragm of the requirement that can satisfy compressive strength that injection molding makes; Equipped step is: three boss on the primary diaphragm back side are aimed at and snapped in three recessed heavy stands on the second layer diaphragm front.

The moulding process of diaphragm of diaphragm pump, wherein: comprise that forming step is: hard MODIFIED PP raw material thatshore hardness degree 80 degree is above or hard modified PVC raw material adopt the second layer diaphragm of the requirement that can satisfy compressive strength that molding and forming makes in first mould, again this second layer diaphragm is put into second mould as inserts, the first layer diaphragm that can satisfy the sealability requirement that soft MODIFIED PP raw material that shore hardness degree 60 degree are following or soft modified PVC raw material adopt molding and forming to make in second mould.

Above-mentioned hard modified PVC raw material and soft modified PVC raw material are that 60%～85% Corvic, plasticizingagent 10%～30% and auxiliary material 5%～10% ratio are carried out mixed and modified making.

Compared with prior art, the present invention adopts has the different double-layer structure of shore hardness, being positioned at pump cavity and the chamber of septum diaphragm that contacts that is sealed and matched is the first layer diaphragm, its shore hardness is softer, satisfies the sealability requirement of diaphragm pump, be positioned at become under the first layer diaphragm with this closely cooperate contact for second layer diaphragm, its shore hardness is harder, with the compressive strength that guarantees that it is enough, and hold the first layer diaphragm, satisfy the requirement of entire compression intensity.The first layer diaphragm only need satisfy seal request in functional requirement, so its material can be done enough softly, make it have very high pliability and elasticity.Second layer diaphragm only need satisfy the resistance to compression requirement on function, so the shore hardness of its material can be done higherly.In long-time running, because second layer diaphragm has enough intensity, under hydraulic action, also have only micro-deformation, the first layer diaphragm is held also by second layer diaphragm just can not produce sharp point.Such combined membrane not only can satisfy the sealability requirement, also satisfies the requirement of anti-bending deflection and compressive strength, and the cost increase seldom, and is simple in structure, easy for installation.

Description of drawings

Fig. 1 is the cross section structure schematic representation of existing diaphragm commonly used mounting point;

Fig. 2 is the schematic cross-section that existing diaphragm commonly used is in operation and is out of shape;

Fig. 3 is the cross section structure schematic representation of embodiment of the invention diaphragm structure and mounting point thereof;

Fig. 4 is the structural representation of primary diaphragm among Fig. 3;

Fig. 4 A is that the A-A of Fig. 4 is to the sectional structure schematic representation;

Fig. 4 B is the schematic perspective view of Fig. 4;

Fig. 5 is the structural representation of secondary diaphragm among Fig. 3;

Fig. 5 A is that the A-A of Fig. 5 is to the sectional structure schematic representation;

Fig. 5 B is the schematic perspective view of Fig. 5;

Fig. 6 assembles decomposing schematic representation among Fig. 3;

Fig. 7 is a corresponding diaphragm structure schematic representation among Fig. 3;

Fig. 8 is the corresponding diaphragm structure distortion schematic representation that is in operation among Fig. 3.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As Fig. 3 to embodiment one shown in Figure 8, diaphragm of diaphragm pump, comprise the diaphragm body that is fitted between fluid chamber's support 9 and the chamber ofseptum 12, wherein: the one side that the diaphragm body matches with fluid chamber support 9 is hard MODIFIED PP layer or hard modified PE layer or the hard modified PVC layer or the hard modification PA layer of the requirement that can satisfy compressive strength; The another side that the diaphragm body matches with chamber ofseptum 12 is for satisfying soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or the rubber layer that sealability requires.

Embodiment one is: soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or rubber layer constitutefirst layer diaphragm 7, hard MODIFIED PP layer or hard modified PE layer or hard modified PVC layer or hard modification PA layer constitutesecond layer diaphragm 8, and,first layer diaphragm 7 is the formation one that closely matches withsecond layer diaphragm 8, and has the surface of contact that matches.Second layer diaphragm 8 is close tofirst layer diaphragm 7, makes both be equipped with the structure as one, in use can be harmonious, have the soft or hard characteristic concurrently.Three recessedheavy stand 8b that have on thesecond layer diaphragm 8 positive E, threeboss 7d that have onprimary diaphragm 7 back side D, threeboss 7d ofprimary diaphragm 7 are engaged in three recessedheavy stand 8b of second layer diaphragm 8.Be shaped on upwardly extending first all flanging 7a and second all flanging 7b onfirst layer diaphragm 7 outer circumferential faces, first all flanging 7a and second all flanging 7b constitute the recessed allgroove 7c that are used to snap in Sealing 10.A week that is shaped on downward extension onsecond layer diaphragm 8 outer circumferential faces is used to snap in theflange 8a of fluid chamber's support 9 groove 9a, theflange 8a of thesecond layer diaphragm 8 after the assembling buckles in fluid chamber's support 9 groove 9a, can effectively avoidsecond layer diaphragm 8 translation that is stretched in bending deflection up and down.

Three the locatingcolumn 7e that are used for equippedpiston 14 that have onfirst layer diaphragm 7 fronts.Three boss thatshake wheel assembly 15 are inserted in three corresponding apertures in fluid chamber's support 9, utilizefastening piece 13 with the combination ofpiston 14,primary diaphragm 7 andsecond layer diaphragm 8 withshake wheel assembly 15 and tightly lock together.Sealing 10 is snapped among thegroove 7c ofprimary diaphragm 7 then, anddiaphragm pump housing 11 lower ends have at least the protruding side face of a circle to be complementary to be close to Sealing 10 and to contact; Be taken up in order of priority again and buckle chamber ofseptum 12 andfluid chamber 11, and utilize mounting screw thatfluid chamber 11 is tightly locked together with fluid chamber's support 9.Last three theboss 7d peripheries offirst layer diaphragm 7 back side D are shaped on is convenient to the diaphragm body along with the flexible circular cone table top ofpiston 14 vibrations.

First layer diaphragm 7 is made following soft MODIFIED PP layer or soft modified PE layer or the soft modified PVC layer of shore hardness 60 degree, is positioned at pump cavity and the chamber of septum formation compression chamber that is sealed and matched, and can satisfy the sealability requirement of diaphragm pump;Second layer diaphragm 8 is made the above hard MODIFIED PP layer ofshore hardness 80 degree or hard modified PE layer or hard modified PVC layer, be positioned at above-mentionedfirst layer diaphragm 7 below, supportfirst layer diaphragm 7, satisfy the requirement of compressive strength, andfirst layer diaphragm 7 has the surface of contact that matches withsecond layer diaphragm 8, has the soft or hard characteristic concurrently.

The moulding process of its diaphragm of diaphragm pump, wherein: comprise forming step and equipped step, forming step is:

That adopts that molding and forming or compression molding mode make can satisfy thefirst layer diaphragm 7 that sealability requires, corresponding specification, and adopt thesecond layer diaphragm 8 of the requirement that can satisfy compressive strength that injection molding makes; Equipped step is: threeboss 7d onprimary diaphragm 7 back side D are aimed at and snap in three recessedheavy stand 8b on thesecond layer diaphragm 8 positive E.

Embodiment two is: soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or rubber layer constitutefirst layer diaphragm 7, hard MODIFIED PP layer or hard modified PE layer or hard modified PVC layer or hard modification PA layer constitutesecond layer diaphragm 8, and,first layer diaphragm 7 andsecond layer diaphragm 8 be for to make one through quadric injection mould, and have the surface of contact of fusion mutually.Second layer diaphragm 8 mergesfirst layer diaphragm 7, makes both constitute the structure of one, in use can be harmonious, have the soft or hard characteristic concurrently.

Be shaped on upwardly extending first all flanging 7a and second all flanging 7b onfirst layer diaphragm 7 outer circumferential faces, first all flanging 7a and second allflanging 7b constitute the recessed allgroove 7c that are used to snap in Sealing 10.A week that is shaped on downward extension onsecond layer diaphragm 8 outer circumferential faces is used to snap in theflange 8a of fluid chamber's support 9 groove 9a, theflange 8a of thesecond layer diaphragm 8 after the assembling buckles in fluid chamber's support 9 groove 9a, can effectively avoidsecond layer diaphragm 8 translation that is stretched in bending deflection up and down.

Three the locatingcolumn 7e that are used for equippedpiston 14 that have onfirst layer diaphragm 7 fronts.Three boss thatshake wheel assembly 15 are inserted in three corresponding apertures in fluid chamber's support 9, utilizefastening piece 13 with the combination ofpiston 14,primary diaphragm 7 andsecond layer diaphragm 8 withshake wheel assembly 15 and tightly lock together.Sealing 10 is snapped among thegroove 7c ofprimary diaphragm 7 then, anddiaphragm pump housing 11 lower ends have at least the protruding side face of a circle to be complementary to be close to Sealing 10 and to contact; Be taken up in order of priority again and buckle chamber ofseptum 12 andfluid chamber 11, and utilize mounting screw thatfluid chamber 11 is tightly locked together with fluid chamber's support 9.Last three theboss 7d peripheries offirst layer diaphragm 7 back side D are shaped on is convenient to the diaphragm body along with the flexible circular cone table top ofpiston 14 vibrations.

First layer diaphragm 7 is made following soft MODIFIED PP layer or soft modified PE layer or the soft modified PVC layer of shore hardness 60 degree, is positioned at pump cavity and the chamber of septum formation compression chamber that is sealed and matched, and can satisfy the sealability requirement of diaphragm pump;Second layer diaphragm 8 is made the above hard MODIFIED PP layer ofshore hardness 80 degree or hard modified PE layer or hard modified PVC layer, be positioned at above-mentionedfirst layer diaphragm 7 below, satisfy the requirement of compressive strength, andfirst layer diaphragm 7 andsecond layer diaphragm 8 have the surface of contact that merges mutually, have the soft or hard characteristic concurrently.

The moulding process of its diaphragm of diaphragm pump, wherein: comprise that forming step is: hard MODIFIED PP raw material thatshore hardness 80 degree is above or hard modified PVC raw material adopt thesecond layer diaphragm 8 of the requirement that can satisfy compressive strength that molding and forming makes in first mould, again thissecond layer diaphragm 8 is put into second mould as inserts, thefirst layer diaphragm 7 that can satisfy the sealability requirement that soft MODIFIED PP raw material that shore hardness 60 degree are following or soft modified PVC raw material adopt molding and forming to make in second mould.Hard modified PVC raw material and soft modified PVC raw material are that 60%～85% Corvic, plasticizingagent 10%～30% and auxiliary material 5%～10% ratio are carried out mixed and modified making.

In long-time running, becausesecond layer diaphragm 8 has enough intensity, under hydraulic action, also have only micro-deformation,first layer diaphragm 7 is held also bysecond layer diaphragm 8 just can not produce sharp point 4b.Such combined membrane not only can satisfy the sealability requirement, also satisfies the requirement of anti-bending deflection and compressive strength, and the cost increase seldom, and is simple in structure, easy for installation.

Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.

Claims (8)

1. diaphragm of diaphragm pump, comprise the diaphragm body that is fitted between fluid chamber's support (9) and the chamber of septum (12), it is characterized in that: the one side that described diaphragm body matches with described fluid chamber support (9) is to satisfy hard MODIFIED PP layer or hard modified PE layer or the hard modified PVC layer or the hard modification PA layer of the requirement of compressive strength; The another side that described diaphragm body matches with described chamber of septum (12) is for satisfying soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or the rubber layer that sealability requires; Described soft MODIFIED PP layer or soft modified PE layer or soft modified PVC layer or rubber layer constitute first layer diaphragm (7), and described hard MODIFIED PP layer or hard modified PE layer or hard modified PVC layer or hard modification PA layer constitute second layer diaphragm (8).

2. diaphragm of diaphragm pump according to claim 1 is characterized in that: described first layer diaphragm (7) is the formation one that closely matches with second layer diaphragm (8), and has the surface of contact that matches.

3. diaphragm of diaphragm pump according to claim 1 is characterized in that: described first layer diaphragm (7) and second layer diaphragm (8) be for to make one through quadric injection mould, and have the surface of contact of fusion mutually.

4. diaphragm of diaphragm pump according to claim 3, it is characterized in that: be shaped on upwardly extending first all flangings (7a) and second all flangings (7b) on described first layer diaphragm (7) outer circumferential face, first all flangings (7a) and second all flangings (7b) constitute the recessed all grooves (7c) that are used to snap in Sealing (10).

5. diaphragm of diaphragm pump according to claim 1 is characterized in that: the flange (8a) that is used to snap in described fluid chamber support (9) groove (9a) week that is shaped on downward extension on described second layer diaphragm (8) outer circumferential face; Three locating columns (7e) that are used for equipped piston (14) that have on described first layer diaphragm (7) front.

6. diaphragm of diaphragm pump according to claim 5 is characterized in that: last three boss in described first layer diaphragm (7) back side (D) (7d) periphery is shaped on is convenient to described diaphragm body along with the flexible circular cone table top of described piston (14) vibration.

7. the moulding process of diaphragm of diaphragm pump, it is characterized in that: comprise forming step and equipped step, forming step is:

That adopts that molding and forming or compression molding mode make can satisfy the first layer diaphragm (7) that sealability requires, corresponding specification, and adopt the second layer diaphragm (8) of the requirement that can satisfy compressive strength that injection molding makes; Equipped step is: three recessed heavy stands (8b) on the second layer diaphragm (8) positive (E) are aimed at and snapped in to three boss (7d) on primary diaphragm (7) back side (D).

8. the moulding process of diaphragm of diaphragm pump, it is characterized in that: comprise that forming step is: hard MODIFIED PP raw material that shore hardness 80 degree is above or hard modified PVC raw material adopt the second layer diaphragm (8) of the requirement that can satisfy compressive strength that molding and forming makes in first mould, again this second layer diaphragm (8) is put into second mould as inserts, the first layer diaphragm (7) that can satisfy the sealability requirement that soft MODIFIED PP raw material that shore hardness 60 degree are following or soft modified PVC raw material adopt molding and forming to make in second mould; Described hard modified PVC raw material and soft modified PVC raw material are that 60%～85% Corvic, plasticizing agent 10%～30% and auxiliary material 5%～10% ratio are carried out mixed and modified making.

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