CN2278783Y

CN2278783Y - Non-impact low-noise adjustable creep pump

Info

Publication number: CN2278783Y
Application number: CN 96219757
Authority: CN
Inventors: 王晓庆; 王小晖
Original assignee: Chuangge Science And Technology Group Beijing
Current assignee: Beijing Trunk Technology Group
Priority date: 1996-10-15
Filing date: 1996-10-15
Publication date: 1998-04-15
Anticipated expiration: 2006-10-15

Abstract

The utility model provides a non-impact low-noise adjustable creep pump which is provided with a pump body with a hollow inner cavity, wherein one side of the pump body is provided with an access hole which is connected with both ends of a carrying pipe. The inner cavity of the pump body is provided with a turning pressure mechanism which is fixedly sheathed with a rotating shaft which is driven to rotate with an outer matched motor. The turning pressure mechanism is provided with two press rolls which roll with a flexible conduit which lies against the inner wall of the inner cavity. The utility model is characterized in that a driving mechanism is composed of a rotary plate sheathing with two symmetrical convex arms, a connecting rod which is pivoted with the convex arms, an L-shaped rotary arm which is connected with the other end of the connecting rod, and a rotary arm shaft which is connected with the other end of the rotary arm, wherein the rotary arm shaft is respectively connected with the rotary plate which is sheathed on the inner segment of the rotary shaft and corresponds to the rotary plate sheathing.

Description

A kind of adjustable Wriggling Pump Head that does not have impact and low noise

The utility model relates to a kind of pump, particularly a kind of adjustable Wriggling Pump Head that does not have impact and low noise.

Peristaltic pump is a kind of increasingly extensive new pump kind of using, the fluid that it is mainly used in being carried can not directly contact the occasion of the pump housing, such as, pumping blood, deep-etching and radioactive liquid, sterile liquid etc., so it has become hospital operating room, the indispensable indispensable equipment in laboratory and some special industry production department.Peristaltic pump mainly is made of pump head and the outer gas-distributing motor that turns the rotation of pump head inner pump, and between motor and rotatingshaft, be provided with shaft coupling, motor can be selected stepper motor for use and be controlled by computer, to guarantee the continuity and the accuracy of speed governing and speed governing, satisfying the conveying needs of different flow, but the parts of most critical are pump heads in peristaltic pump.Because pump head is the core part that realizes carrying liquid.

A kind of quantitative packing Wriggling Pump Head is disclosed in 94248865.2 patents, its main structure is that the runing rest that is turned by motor is housed in the inner chamber of the pump housing, both sides at runing rest respectively articulate a rocking bar, at the reverse each other free end of rocking bar one nip drum that can push mutually with the delivery hose in inner chamber around the home is set respectively, one spring respectively is housed between inboard, rocking bar stage casing and runing rest, the screw of adjustable springs elasticity also is equipped with in the spring corresponding part, to reach the purpose that changes spacing between rocking arm free end nip drum and internal chamber wall, and the purpose that changes spacing is in order to adapt to the replacing needs of different size delivery hose, thereby satisfies the needs of different quantity delivereies.The main goal of the invention of this patent that Here it is.

But because the liquid that such peristaltic pump is failed not only requires enough flows, and the fluid that requires to be carried will flow stable and reduces its pulsating nature as far as possible, therefore, necessarily require nip drum when squeezing tube, particularly will produce as far as possible little impact in the moment that enters the extruding delivery area.Here it is, and to require nip drum should be gradually supercharging during the delivery area entering extruding; Rather than unexpected supercharging, therefore, with regard to requiring top clearance between nip drum and the pump housing inner chamber wall is that gradually a descending buffering changes, and after satisfying the sort buffer variation, require nip drum that flexible pipe is had enough extruding forces, can produce vacuum and squeeze the double action that pushes away to reach, and by this effect continuously, reposefully, the quantitative fluid that is fed forward, but, can't reach the purpose that changes above-mentioned shortcoming because the main inventive point of 94248865.2 patents is at the needs of adjusting on a large scale that adapt to different flow.

In addition, in the nip drum squeezing tube, during liquid, except will satisfying above-mentioned continuous, steady, quantitative requirement, also require when pumping blood, can not produce excessive pressure, in order to avoid destroy red blood cell in the blood.Therefore, just require to keep appropriate gap between the inwall of nip drum and inner chamber extruding delivery area, and this gap can be adjusted in advance.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect of prior art, and a kind of impact of eliminating is provided, and pushes steadily and the adjustable Wriggling Pump Head of impact of the nothing of pulsating movement free, low noise, long-life and low noise.

The purpose of this utility model is to realize by following technological scheme:

The utility model has a pump housing that has a hollow cavity, the pump housing one side offers the access hole that plugs with the delivery pipe two ends, linked pump cover at pump housing open-position-side, in pump housing inner chamber, be equiped with outside the rotating shaft that turns of gas-distributing motor be nested the commentaries on classics press mechanism solid, change on the press mechanism and be equiped with two nip drums that carry out roll extrusion with the flexible pipe that abuts on the internal chamber wall, it is characterized in that: driving mechanism is the rotating disk cover that has two symmetrical protruding arms by, the connecting rod that is articulated with protruding arm, the L shaped pivoted arm that links to each other with the connecting rod the other end and constitute, tumbler shaft with tumbler shaft that pivoted arm the other end pivot connects then respectively be set in the rotating shaft inner segment on and overlap corresponding rotating disk with rotating disk and be connected.Between two L shaped pivoted arms and bumping post that rotating disk is connected, be equiped with the buffering controlling mechanism, and nip drum is contained in respectively in the groove at flex point place of two L shaped pivoted arms.

Therefore: remarkable result of the present utility model is as follows:

The the 1st: because the L shaped pivoted arm of two symmetries and be connected the rotating disk cover at pivoted arm two ends and the ingenious design of rotating disk, the counter-force that the feasible nip drum that is installed in pivoted arm flex point place is produced when pushing with flexible pipe can divide supplementary biography to the rotating disk cover and the rotating disk that are connected with its two ends, make rotating disk cover and rotating disk under the effect of power, produce reverse each other moment, this moment can make the pivoted arm flex point place of another the symmetrical place connection that does not enter crush zone produce the recessed shape attitude of a small amount of resiliently deformable because of the pulling force that is subjected to two ends, therefore, the nip drum at this pivoted arm flex point place when entering the initial stage of crush zone and the gap between the crush zone inwall be to become big slightly, so, impact and noise in the time of both can having avoided the initial stage to push can not produce pulsation and excessive extruding to the flexible pipe inner fluid again.So can guarantee the pulsating movement free and the stability of carrying.

The the 2nd: because the nip drum on the pivoted arm before entering crush zone is received shape in being, therefore, can not cause excessive impact extruded at the initial stage that enters crush zone because of the inwall curvature changing to flexible pipe, so, flexible pipe is not easy to wear, break, the blood in the flexible pipe can not destroy because of being subjected to excessive compression to produce blood cell yet, helps to guarantee the quality of institute's pumping blood.

The 3rd: the controlling mechanism of being installed in the pivoted arm, can regulate nip drum on the pivoted arm and the working clearance between the crush zone inwall, guaranteeing to have under the topic before extruding is carried smoothly the excessive preferable gap of squeezing tube not to guarantee to have between nip drum and the inwall one.

The 4th: the damping mechanism in the pivoted arm can cushion automatically or compensate because of material, machining error, and the fluctuation of the top clearance that pipe thickness difference and assembly error are caused changes.Can make running more steady.

The 5th: because running is steady, nothing is impacted, can be made the pump housing, motor, bearing all can be worked under kilter, can improve relatively its working life.

Concrete structure of the present utility model is realized by the following examples and accompanying drawing:

Fig. 1 is a section of structure of the present utility model.

Fig. 2 is the A-A part sectioned view of Fig. 1.

Fig. 3 is the stereogram of Fig. 2 transfer press mechanism.

Fig. 4 is the B-B profile stretch-out view of rotating arm part part among Fig. 2.

Fig. 5 is that the C of Fig. 1 is to view.

Below in conjunction with accompanying drawing 1-5 concrete structure of the present utility model is described in detail:

The utility model has a pump housing 3 that has a hollow cavity 31, open-position-side at the pump housing 3 has linked pump cover 15, the pump housing 3 one sides offer the manhole appendix 32 of load flexible pipe 7, the flexible pipe 7 curved inwall sides that are attached to inner chamber 31, inner chamber 31 has a semicircle extruding to carry segmental arc 311, in pump housing hollow cavity 31, be equiped with and turn by outer gas-distributing motor, and be nested the commentaries on classics press mechanism solid with rotating shaft 4, change be equiped with on the press mechanism two be symmetrically distributed and with the flexible pipe 7 internal ring walls nip drum 12 of roll extrusion mutually, it is characterized in that: changeing press mechanism is to overlap 2 by a rotating disk that has two symmetrical evagination armed levers 21, the connecting rod 9 that is connected with two protruding armed levers 21, the L shaped pivoted arm 8 that links to each other with connecting rod 9 the other ends and with L shaped pivoted arm 8 the other ends mutually the tumbler shaft 85 of activity inserting constitute, the outer spy section of tumbler shaft 85 be sleeved on the rotating shaft 4 spindle nose sections 41, and overlapping 2 concentric corresponding rotating disks 1 with rotating disk is connected, being equiped with ladder shelves post 10, two nip drums 12 that an end is connected with rotating disk 1 in the shoulder hole 83 of the L shaped pivoted arm 8 of that side that L shaped pivoted arm 8 links to each other with connecting rod 9 is installed in by bearing pin 121 respectively in the groove 82 of corner of L shaped pivoted arm 8 of two symmetries.Referring to Fig. 1 to Fig. 5.

Rotating disk cover 2 has a body of joining with rotating shaft 4 upper bearing (metal)s 5 covers, the body open-position-side have one with body be one, and along two protruding armed levers 21 of body radial symmetric projection, two protruding armed levers 21 are fixedly connected with an end of two connecting rods 9 respectively by bearing pin 22, the other end of two connecting rods 9 connects with screw 11 pivots and fixedlys connected with L shaped pivoted arm 8 by attachment screw 11, insert at interval is that the convex hollow sleeve 33 of the pump housing 3 is set with bearing 6 between body 33 endoporus 331 and rotating shaft stage casing 42 in the endoporus 23 of rotating disk cover 2, be positioned at the inboard corresponding part of rotating disk cover 2 with the rotating disk 1 of rotating shaft 4 spindle nose sections 41 suits, 1 side symmetry of rotating disk is raised with two projections 114, two corresponding projections are connected with the spindle nose end 851 of two tumbler shafts 85, the cylindrical section 103 of the ladder shelves post 10 that plugs in the in addition two corresponding perforation 113 on the rotating disk 1 and two pivoted arms 8 is the company of twisting mutually, the stage casing of ladder shelves post 10 is the square shaft section 102 that is screwed adjusting screw 141, the square shaft section 102 outer sections of ladder shelves post 10 are the cap body 104 of a block at L shaped pivoted arm 8 shoulder holes 83 open-position-side walls, ladder shelves post 10 circumferentially is Spielpassung with shoulder hole 83, between the shoulder hole 83 of and L shaped pivoted arm 8 inboard a buffer body 14 is arranged in the square shaft section 102 of ladder shelves post 10, between the cylindrical section 103 of the ladder shelves post 10 in L shaped pivoted arm 8 ends and shoulder hole 83 fastening screw trip bolt 84 is arranged, be screwed the position-limited lever 13 that is symmetrically distributed and is positioned at 7 liang of sides of flexible pipe in the both sides of two L shaped pivoted arms 8.Referring to Fig. 1 to Fig. 5.

Two L shaped pivoted arms 8 be connected with it and be the rotating disk cover 2 of Different Plane setting and the center line of rotating disk 1 has constituted two intersect and two symmetrical rhombus frameworks, connecting rod 9 is positioned at the rotating disk cover 2 of its underpart and L shaped pivoted arm 8 centres on its top, the rotating disk 1 of the hexagon water chestnut fusiformis perforation 113 of two projections 114 and other two symmetries of inner bulge vertically is provided with circumferentially differing 90 degree, offers screw for connection or bore a hole 1141 on two projections 114.Referring to Fig. 1 to Fig. 5.

Shoulder hole 83 stage casings inboard with ladder shelves post 10 square shaft sections 102 inboards between buffer body 14 be to constitute by stubborn square shaft section 102 adjusting screw 141 and shoring radially that is placed at the counterbore 1411 of screw 141 and the damping spring between corresponding part, the shoulder hole 83 stage casing groove 831, have a perforation 81 that communicates with shoulder hole 83 in L shaped pivoted arm 8 vertical sides corresponding to adjusting screw 141 corresponding parts.Referring to Fig. 4.

Working principle of the present utility model is as follows: referring to Fig. 1 and Fig. 2, when outer gas-distributing motor drives rotating shaft 4 rotations, be fixed in the commentaries on classics press mechanism that is arranged in pump housing inner chamber 31 in the rotating shaft 4, be that disk cover 2 and rotating disk 1 begin to rotate, when disk cover 2 and rotating disk 1 rotation, then driving the L shaped pivoted arm 8 that constitutes two symmetrical rhombus annexations rotates, when the nip drum 12 at the flex point place of one of them pivoted arm 8 enters when pushing with flexible pipe, on the one hand the flexible pipe inner fluid is produced the double action of vacuum and extruding propelling movement, and constantly fluid is transferred to and pumps hole 32 by pumping into the hole, at the same time, because the relation of active force and reaction force, the nip drum of L shaped pivoted arm 8 is subjected to inside reaction force always in crush zone, this power can be extended along this pivoted arm and decomposed and be delivered to the disk cover 2 that is hinged with its two ends and the tie point place of rotating disk 1, and make and be connected another symmetrical side of two parts, but another the L shaped pivoted arm 8 that does not also enter crush zone produces the stretching action at relative flex point place, thereby the nip drum that makes the flex point place is subjected to the interior contraction of a resiliently deformable always, increase the gap when entering crush zone to reach, reduce the purpose of impacting.This effect hockets mutually.

Claims

1, a kind of adjustable Wriggling Pump Head that does not have impact and low noise, one pump housing (3) that has hollow cavity (31) is arranged, open-position-side at the pump housing (3) has linked pump cover (15), the pump housing (3) one sides offer the manhole appendix (32) of load flexible pipe (7), the curved inwall side that is attached to inner chamber (31) of flexible pipe (7), internal organ (31) have a semicircle extruding to carry segmental arc (311), in pump housing hollow cavity (31), be equiped with and turn by outer gas-distributing motor, and be nested the commentaries on classics press mechanism solid with rotating shaft (4), change be equiped with on the press mechanism two be symmetrically distributed and with flexible pipe (7) the internal ring wall nip drum of roll extrusion (12) mutually, it is characterized in that: change press mechanism and be the rotating disk cover (2) that has two symmetrical evagination armed levers (21) by, the connecting rod (9) that is connected with two protruding armed levers (21), the L shaped pivoted arm (8) that links to each other with connecting rod (9) the other end and with L shaped pivoted arm (8) the other end mutually the tumbler shaft of activity inserting (85) constitute, the outer spy section of tumbler shaft (85) be sleeved on rotating shaft (4) the spindle nose section (41), and be connected with the concentric corresponding rotating disk of rotating disk cover (2) (1), be equiped with the ladder shelves post (10) that an end is connected with rotating disk (1) in the shoulder hole (83) of the L shaped pivoted arm (8) of that side that L shaped pivoted arm (8) links to each other with connecting rod (9), two nip drums (12) are installed in the groove (82) of corner of L shaped pivoted arm (8) of two symmetries by bearing pin (121) respectively.

2, according to the described a kind of adjustable Wriggling Pump Head that does not have impact and low noise of claim 1, it is characterized in that: rotating disk cover (2) has a body of joining with rotating shaft (4) upper bearing (metal) (5) cover, the body open-position-side have one with body be one, and along two protruding armed levers (21) of body radial symmetric projection, two protruding armed levers (21) are fixedly connected with an end of two connecting rods (9) respectively by bearing pin (22), the other end of two connecting rods (9) connects with screw (11) pivot and fixedlys connected with L shaped pivoted arm (8) by attachment screw (11), insert at interval is the convex hollow sleeve (33) of the pump housing (3) in the endoporus (23) of rotating disk cover 2, between body (33) endoporus (331) and rotating shaft (4) stage casing (42), be set with bearing (6), be positioned at the inboard corresponding part of rotating disk cover (2) with the rotating disk (1) of rotating shaft (4) spindle nose section (41) suit, rotating disk (1) axle side symmetry is raised with two projections (114), two corresponding projections are connected with the spindle nose end (851) of two tumbler shafts (85), the cylindrical section (103) of the ladder shelves post (10) that plugs in the in addition two corresponding perforation (113) on the rotating disk (1) and two pivoted arms (8) is the company of twisting mutually, the stage casing of ladder shelves post (10) is for being screwed the square shaft section (102) of adjusting screw (141), the outer section of the square shaft section (102) of ladder shelves post (10) is the cap body (104) of a block at L shaped pivoted arm (8) shoulder hole (83) open-position-side wall, ladder shelves post (10) circumferentially is Spielpassung with shoulder hole (83), between the shoulder hole (83) of and L shaped pivoted arm (8) inboard a buffer body (14) is arranged in the square shaft section (102) of ladder shelves post (10), between the cylindrical section (103) of the ladder shelves post (10) in L shaped pivoted arm (8) end and shoulder hole (83) fastening screw trip bolt (84) is arranged, be screwed the position-limited lever (13) that is symmetrically distributed and is positioned at flexible pipe (7) two sides in the both sides of two L shaped pivoted arms (8).

3, according to claim 1 or 2 described a kind of adjustable Wriggling Pump Heads that do not have impact and low noise, it is characterized in that: two L shaped pivoted arms (8) be connected and be the rotating disk cover (2) that Different Plane is provided with and the center line of rotating disk (1) with it and constituted the two also two symmetrical rhombus frameworks that intersect, connecting rod (9) is positioned at the rotating disk cover (2) of its underpart and L shaped pivoted arm (8) centre on its top, the rotating disk (1) of the hexagon water chestnut fusiformis perforation (113) of two projections (114) and other two symmetries of inner bulge vertically is provided with circumferentially differing 90 degree, offers for connection screw or perforation (1141) on two projections (114).

4, according to the described a kind of adjustable Wriggling Pump Head that does not have impact and low noise of claim 2, it is characterized in that: the buffer body (14) that is positioned between inboard, shoulder hole (83) stage casing and ladder shelves post (10) square shaft section (102) inboard is to twist by one to be placed on square shaft section (102) adjusting screw (141) radially, and shore at the counterbore (1411) of screw (141) and the damping spring between shoulder hole (83) corresponding part, the stage casing groove (831) and constitute, vertically having a perforation (81) that communicates with shoulder hole (83) in the side at L shaped pivoted arm (8) corresponding to adjusting screw (141) corresponding part.