CN202718820U

CN202718820U - Diaphragm metering pump

Info

Publication number: CN202718820U
Application number: CN 201220305428
Authority: CN
Inventors: ***; 柴立平; 周敏; 何玉杰; 程道武; 燕浩; 姜漫
Original assignee: HEFEI HUASHENG PUMPS VALVES CO Ltd
Current assignee: Hefei Huasheng Pumps & Valves Co ltd
Priority date: 2012-06-27
Filing date: 2012-06-27
Publication date: 2013-02-06
Anticipated expiration: 2022-06-27

Abstract

The utility model belongs to the field of metering pumps and particularly relates to a diaphragm metering pump. The diaphragm metering pump comprises a pump body, wherein a liquid inlet duct and a liquid outlet duct are arranged on the pump body. The diaphragm metering pump further comprises an energy storing and discharging unit, wherein the outlet end of the energy storing and discharging unit is communicated to the liquid outlet duct and has two work states: when the pump body is positioned in the liquid discharging process, part of fluid passing through the inside of the liquid outlet duct is absorbed and stored by the energy storing and discharging unit; and when the pump body is positioned in the liquid absorbing process, fluid absorbed by the energy storing and discharging unit is released and drained by the outlet end of the energy storing and discharging unit. The diaphragm metering pump disclosed by the utility model is simple and practical in structure and stable and reliable in work; and the pressure pulse at an outlet of the pump body can be effectively reduced.

Description

A kind of diaphragm metering pump

Technical field

The utility model belongs to the metering pump field, is specifically related to a kind of diaphragm metering pump.

Background technique

Diaphragm metering pump utilizes the flexible partition of particular design processing to replace plunger, concrete structure can be with reference to shown in Figure 1, it has feed liquor duct and fluid duct, be provided with the one-way valve c for the limiting pressure one-directional fluid flow between above-mentioned duct and the main aperture road, barrier film place, rely on the reciprocating feed action of driving mechanism b during work and make barrier film a breathing phenomenon occur, the final pulsed conveying function of realizing for pressure fluid; Because the intermediate isolating effect of barrier film, it has structurally really realized the fully isolation between pressure fluid and driving and the lubricating structure.At present, diaphragm metering pump has become the main force's pump type in the fluid metering application.In fact, the conventional membrane metering pump is when possessing above advantage, and its deficiency is also very obvious: it is when work, because the structural feature of itself, driving mechanism reciprocating action once, barrier film is namely finished respiration, finishes once suction-discharge process thereby drive fluid; Above-mentioned pulsed feed liquid way, one side has caused the discontinuity of its discharge flow rate, and simultaneously, larger pulse shock must be born in its pump housing outlet port when also causing each feed flow, thereby the safe and reliable operation of its pump housing parts is brought hidden danger.

The model utility content

The purpose of this utility model provides a kind of diaphragm metering pump simple in structure, can effectively reduce the pressure pulse in pump housing outlet port, and its working stability is reliable.

For achieving the above object, the utility model has adopted following technological scheme: a kind of diaphragm metering pump, comprise the pump housing, be provided with feed liquor duct and fluid duct on the described pump housing, described diaphragm metering pump also comprises and holds the exoergic unit, the outlet end that holds the exoergic unit is communicated on the fluid duct, and there are two kinds of working staties in the described exoergic unit that holds: when the pump housing was in the discharge opeing process, the exoergic unit absorbed and storage by holding through the segment fluid flow in the fluid duct; When the pump housing is in the imbibition process, holds fluid that the exoergic unit absorbs and discharge and discharge through its outlet end.

Major advantage of the present utility model is: when the pump housing is in the discharge opeing process, by holding the absorption accumulation of energy function of exoergic unit, can play the effect of the pulse shock at effective reduction pump discharge place; When the pump housing is in the imbibition process, hold the exoergic unit and discharge voluntarily more original fluid that absorbs, thereby the continuity that realizes the pump discharge fluid is discharged.The utility model is simple and practical, can effectively reduce the pressure pulse in pump housing outlet port, and its working stability is reliable.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of position-limiting unit;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the structural representation that holds the exoergic unit;

Fig. 5 is the I part partial enlarged drawing of Fig. 1;

Fig. 6 holds the exoergic unit to be in structure sectional view under the normal state;

Fig. 7 holds the exoergic unit to be in structural representation under the energy accumulating state.

Embodiment

A kind of diaphragm metering pump, comprise the pump housing, be provided with feed liquor duct 10 and fluid duct 20 on the described pump housing, described diaphragm metering pump also comprises and holds exoergic unit 30, the outlet end that holds exoergic unit 30 is communicated on the fluid duct 20, there are two kinds of working staties in the described exoergic unit 30 that holds: when the pump housing is in the discharge opeing process, absorb and storage by holding exoergic unit 30 through the segment fluid flow in the fluid duct 20; When the pump housing is in the imbibition process, holds fluid that exoergic unit 30 absorbs and discharge and discharge through its outlet end.

In fact, if the pulse of pumping of diaphragm metering pump that will be at present traditional is considered as sinusoidal words that possess crest and trough, the effect of holding exoergic unit 30 in the utility model, be when the pump housing is in the discharge opeing process, as shown in Figure 7, by holding the absorption accumulation of energy function of exoergic unit 30, pump the crest value of pulse to play effective reduction, reduce the effect of the pulse shock at pump discharge place when the discharge opeing process; When the pump housing is in the imbibition process, as shown in Figure 6, holds again retraction or manually discharge original pressure fluid that absorbs voluntarily of exoergic unit, thereby reach the effect that improves the trough value pump pulse; The utility model is by holding the setting of exoergic unit 30, can effectively reduce aforementioned sinusoidal fluctuating range, for the continuity discharging that realizes the pump discharge fluid provides possibility, it is simple and practical, can effectively reduce the pressure pulse in pump housing outlet port, the equipment working stability is reliable.

As further preferred version of the present utility model: shown in Fig. 1-7, the described exoergic unit 30 that holds holds the exoergic parts for elasticity.During actual selecting, its specific implementation can be multiple, such as resilient sleeve, rubber bag etc., as long as can realize the parts of its spring energy storage and automatic exoergic, can realize that all it holds the exoergic operation; Of the present utility model being preferably: hold exoergic unit 30 and be the barrel-shaped elastic bellows of cover, its bung place consists of its outlet end.Like this, when the pump housing is in the discharge opeing process, the piston of driving mechanism is compressed into, the barrier film evagination is also pushed the pressure fluid that is positioned at the main aperture road, this moment, pressure fluid entered fluid duct 20 by one-way valve c, most of pressure fluid flows out by pump discharge, and the fraction pressure fluid is held the exoergic unit and absorbs and store, and holds the exoergic unit this moment and is in as shown in Figure 5 elastic expansion state; When the pump housing is in the imbibition process, backward stroke of the piston, fluid duct 20 internal pressures begin to reduce gradually, until when holding hydrodynamic pressure in the exoergic unit 30 greater than fluid duct 20 fluid pressure, under itself resilient force, hold exoergic unit 30 exoergics, stored fraction pressure fluid flows out by pump discharge in it, thereby the effect of having played the discontinuity of improving the pump discharge fluid and having reduced the pump discharge pressure pulsation finally can safe and reliable work provide effective assurance for diaphragm metering pump.

Further, for guaranteeing to hold the reliably working of exoergic unit 30, its range of expansion is done following restriction herein: holding exoergic unit 30, radially to allow range of expansion be 1～1.2 times, and its axial expansion allowed band is 1～1.5 times.During actual the use, can realize its physics limit function by establish stop collar in the outer cover of holding exoergic unit 30, be specially shown in Fig. 1-3 and 6-7, diaphragm metering pump also comprises and is nested in the position-limiting unit 40 that holds 30 outer wall places, exoergic unit, position-limiting unit 40 profiles are frame-like, and its frame-like encloses the inner chamber that forms and is construed as limiting the limit chamber 41 that holds exoergic unit 30 range of expansion.Certainly, the actual configuration of position-limiting unit 40 can be decided according to on-site situation, or can directly be designed to the closed sleeve-shaped, maybe can be designed to the mesh structure that many connection straps consist of, further preferred version of the present utility model is: shown in Fig. 2-3, position-limiting unit 40 comprise for hold interior ring 40c that 30 bung places, exoergic unit cooperate, be arranged at the outer shroud 40a that holds 30 tail end places, exoergic unit and the link arm 40b that is used for being connected its inside and outside

ring

40a, 40c anchor ring; The two ends of described link arm 40b are fixed in respectively inside and outside

ring

40a, 40c, at this moment, its link arm namely forms " 7 " the word shape shown in Fig. 2-3, be that the end of described link arm 40b is fixed in the end of closing on outer shroud 40b on the interior ring 40c, its other end is postponed to outer shroud 40b place and is connected the external annulus place of being fixed in outer shroud 40b along its axis.The frame-like of anchor ring connects structure to the utility model by arranging up and down, thereby avoided as much as possible holding exoergic unit 30 when expanding and shrink and the friction between position-limiting unit 40 inwalls, thereby guarantee its actual life, guarantee its all the time reliable and stable work.

For realizing the matching relationship in 20 in position-limiting unit 40 and fluid duct, as shown in Figure 1, postponing to the one side in described fluid duct 20 has branch duct 21, the place, aperture in described branch duct 21 is provided with flange part 21a, end place, position-limiting unit 40 bung place is correspondingly provided with the flange plate 50 that is mated, and bolt cooperates between the two.

Further, described interior ring 40c is provided with countersink region 42 away from the side end face of outer shroud 40a along its axis indent, that is to say, this moment in it ring 40c inner ring surface namely to consist of ladder poroid; Hold 30 bung places, exoergic unit and be provided with flanging 31, described flanging 31 coincide is embedded at countersink region 42 places on the position-limiting unit 40 and flanging 31 thickness greater than countersink region 42 hole depth settings, specifically as shown in Figure 2.Matching relationship by 31 of above-mentioned countersink region 42 and flangings when actual assembled, can guarantee to hold the position constancy of exoergic unit 30.When position-limiting unit 40 was fixed in flange part 21a on the fluid duct 20 when upper by flange plate 50, the flanging 31 at 30 bung places, exoergic unit is held in countersink region 42 extruding and the compressing at position-limiting unit 40 bung places, thereby the extruding by both cooperates on the one hand, has guaranteed the steadiness of both relative positions; Simultaneously, the flanging 31 that its slightly outstanding countersink region 42 ports arrange, also played the effect of seal ring, at position-limiting unit 30 with under the large pressure bolt in fluid duct 20 cooperates, flanging 31 generation elastic strains also closely are squeezed in the flange part 21a end on the fluid duct 20, thereby prevent that the leakage problems of its joint gap from appearring in pressure fluid under discharge opeing under the large pressure of the pump housing, its working stability is reliable.

Claims

1. diaphragm metering pump, comprise the pump housing, be provided with feed liquor duct (10) and fluid duct (20) on the described pump housing, it is characterized in that: described diaphragm metering pump also comprises and holds exoergic unit (30), the outlet end that holds exoergic unit (30) is communicated on the fluid duct (20), there are two kinds of working staties in the described exoergic unit (30) that holds: when the pump housing was in the discharge opeing process, exoergic unit (30) absorbed and storage by holding through the segment fluid flow in fluid duct (20); When the pump housing is in the imbibition process, holds fluid that exoergic unit (30) absorbs and discharge and discharge through its outlet end.

2. diaphragm metering pump according to claim 1, it is characterized in that: the described exoergic unit (30) that holds holds the exoergic parts for elasticity.

3. diaphragm metering pump according to claim 1 is characterized in that: hold exoergic unit (30) and be the barrel-shaped elastic bellows of cover, its bung place consists of its outlet end.

4. according to claim 2 or 3 described diaphragm metering pumps, it is characterized in that: holding exoergic unit (30), radially to allow range of expansion be 1～1.2 times, and its axial expansion allowed band is 1～1.5 times.

5. according to claim 2 or 3 described diaphragm metering pumps, it is characterized in that: described diaphragm metering pump also comprises and is nested in the position-limiting unit (40) that holds outer wall place, exoergic unit (30), position-limiting unit (40) profile is frame-like, and its frame-like encloses the inner chamber that forms and is construed as limiting the limit chamber (41) that holds exoergic unit (30) range of expansion.

6. diaphragm metering pump according to claim 5 is characterized in that: position-limiting unit (40) comprise for hold interior ring (40c) that bung place, exoergic unit (30) cooperates, be arranged at the outer shroud (40a) that holds tail end place, exoergic unit (30) and the link arm (40b) that is used for being connected its inside and outside ring (40a, 40c) end face; One end of described link arm (40b) is fixed in the end of closing on outer shroud (40b) on the interior ring (40c), and (40b) locates to postpone and be connected the external annulus place of being fixed in outer shroud (40b) its other end along its axis to outer shroud.

7. diaphragm metering pump according to claim 5, it is characterized in that: postponing to the one side in described fluid duct (20) has branch duct (21), the place, aperture of described branch duct (21) is provided with flange part (21a), end place, position-limiting unit (40) bung place is correspondingly provided with the flange plate (50) that is mated, and bolt cooperates between the two.

8. diaphragm metering pump according to claim 6, it is characterized in that: the interior ring (40c) on the described position-limiting unit (40) is provided with countersink region (42) away from a side end face of outer shroud (40a) along its axis indent; Hold bung place, exoergic unit (30) and be provided with flanging (31), described flanging (31) coincide be embedded at that countersink region (42) on the position-limiting unit (40) is located and flanging (31) thickness greater than countersink region (42) hole depth setting.