CN207634275U - Combined type peristaltic pump - Google Patents

Abstract

The utility model is related to peristaltic pumps, more particularly to a kind of combined type peristaltic pump, including upper cover, pedestal and positioned at least two wriggling supply units between the two, each wriggling supply unit connects same transmission shaft, there is the rotating member with transmission axis connection on each wriggling supply unit, and with upper cover and the mutually fixed fixing piece of pedestal, the rotating member on adjacent wriggling supply unit keeps linkage, pump line is arranged between rotating member and fixing piece.The independent assortment of multi-channel peristaltic pump, including different pump line types, different port numbers, different installation directions may be implemented in the utility model.It is small, it is easy to use, flexibly, R＆D costs are reduced, convenient for integrated.

Description

Combined type peristaltic pump

Technical field

The utility model is related to the pumps of trandfer fluid, and in particular to a kind of peristaltic pump.

Background technology

Peristaltic pump is a kind of common fluid delivery system, and principle is by alternately squeezing elastic delivery hose Carry out trandfer fluid with release；Have many advantages, such as that pollution-free, the high and low shearing force of precision, good airproof performance, maintenance are simple.Tradition at present Peristaltic pump use roller extrusion structure, due to being influenced by factors such as material property, machining accuracies, roller volume compared with Greatly, and own rotation can bring more energy loss, and generally requiring larger rotating torque could realize to the continuous of pump line It squeezes to achieve the purpose that pump fluid.Therefore, roller peristaltic pump is influenced by motor size, roller size, it is difficult to real The micromation of existing peristaltic pump.

Simultaneously as being influenced by roller surface processing finish, frictional force is larger when roller surface is contacted with pump line, meeting Excessive tensile is generated to pump line and causes deformation, influences flow speed stability, the abrasion of pump line is also larger, influences pump line service life And the stability of pump line service life inner fluid speed.In addition, in the lower occasion of wriggling revolution speed, due to roller size compared with Greatly, cause the interval between adjacent roller larger, and column structure is big to the extruding degree of pump line, to cause obviously Pulsation phenomenon.

And it when multichannel liquid conveys simultaneously, generally requires and uses more peristaltic pumps or multi-channel peristaltic pump.Tradition at present Multi-channel peristaltic pump there is a problem of that volume is larger, it is difficult to be integrated into miscellaneous equipment.Its largest passages number is going out It is limited when factory, the port number of peristaltic pump can only be reduced by changing the quantity of pipe clamp, if being applied to less port number Occasion, can not but change pump housing volume and the energy consumption of pump, result in waste of resources, and inconvenient to use, user be difficult to be based on its Carry out secondary development.

Invention content

The shortcomings that the purpose of the utility model is to overcome the prior arts and deficiency, provide a kind of combined type peristaltic pump, real The independent assortment of existing multi-channel peristaltic pump includes the independent assortment of different pump line types, different port numbers, different installation directions. And equipment volume is small, it is easy to use, flexibly, effectively reduce energy loss, convenient for user is integrated and secondary development, reduce research and development at This.

For achieving the above object, technical solution used by the utility model is：A kind of combined type peristaltic pump, including Upper cover, pedestal and positioned at least two wriggling supply units between the two, each wriggling supply unit connects same transmission shaft, Have on each wriggling supply unit and the rotating member of transmission axis connection, and with upper cover and the mutually fixed fixing piece of pedestal, Rotating member on adjacent wriggling supply unit keeps linkage, and pump line is arranged between rotating member and fixing piece.

Preferably, the wriggling supply unit shape is cylinder, and the pedestal surface opposite with upper cover is equipped with inner loop Shape groove, secondary annular recess is interior equipped with secondary ball, and rotating member and secondary ball close to pedestal and the wriggling supply unit of upper cover connect It touches.

Preferably, the section of the secondary annular recess is the ellipse that width is more than depth, and oval length is more than secondary ball 0.2~0.4mm of diameter, groove height are 1.2~1.3 times of minor axis radius, and secondary ball uses high-precision ceramic ball.

Preferably, the fixing piece periphery of each wriggling supply unit is equipped with multiple equally distributed fixed mounting holes, The position of fixed mounting hole is corresponding with the fixed installation hole site on the pedestal and upper lid, and upper cover, fixing piece and pedestal pass through Fixed mounting hole is fixed.

Preferably, in the wriggling supply unit：The rotating member is discoid, and circumferential surface is equipped with equally distributed revolution Body holding tank is disposed with revolving body in revolving body holding tank, and the rotating shaft of revolving body is parallel with the central shaft of rotating member, revolving body The shape of holding tank is coincide with revolving body, and revolving body top is revealed in outside rotating member；The fixing piece center is protected equipped with rotating member Hole is held, rotating member is located in rotating member retaining hole, and rotating member retaining hole is along the circumferential direction equipped with arc-shaped groove, arc-shaped groove Cross section is arc-shaped, and arc-shaped groove both ends are separately connected the leadout hole for extending to fixing piece outer surface；It is installed on rotating member Revolving body it is corresponding with the arc-shaped groove on fixing piece, the pump line is located at turn around the arc between external circle and arc-shaped groove It is extended to outside fixing piece in shape gap area and from leadout hole.

Preferably, the revolving body is spheroidal, and is made of high-precision ceramic balls, and the revolving body holding tank is hemisphere Shape groove.

Preferably, the radius of the revolving body holding tank is more than the 0.1~0.15mm of revolving body, the arcuation interstitial area The linear width at domain both ends is less than twice of 0.1~0.2mm of pump line thickness, and the arc-shaped groove is identical as the internal diameter of leadout hole, The two intersection is connected using fillet, and radius of corner is 1~2 times of pump line outer diameter.

Preferably, the major part of arc-shaped groove wrapping rotating member outer ring；Or arc-shaped groove has multistage, and It is evenly spaced in rotating member outer ring, each section of arc-shaped groove both ends are separately connected the leadout hole for extending to fixing piece outer surface.

Preferably, it is additionally provided with the annular groove around central shaft in the revolving body holding tank bottom position of the rotating member outer ring Slot, annular ditch groove are connected to revolving body holding tank, and annular ditch groove is to penetrate through along the circumferencial direction of rotating member, on the revolving body Half end is exposed to rotating member outer ring, and intermediate ends are located at turn around in body holding tank, and the bottom end of revolving body and the bottom surface of annular ditch groove connect It touches and is supported by it；Lubricating oil or lubricating grease are filled in the annular ditch groove.

Correspondingly, the integrated positioning mounting means of the combined type peristaltic pump, steps are as follows：

Secondary ball is installed in the secondary annular recess of pedestal, and base sheath is connected to transmission shaft by step 1；

Step 2 will install corresponding ball in first layer rotating member spherical groove, then pacify rotating member by rotation axis Dress hole is socketed on transmission shaft, and the bottom surface of rotating member is contacted with the secondary ball on pedestal in secondary annular recess；

Step 3, the periphery that the corresponding fixing piece of first layer rotating member is installed on to rotating member by rotating member retaining hole, Gu The fixed mounting hole for determining part is corresponding with the fixed mounting hole of pedestal；

Step 4 repeats to install remaining rotating member and corresponding fixing piece according to step 2~3；

Step 5, the mounting hole that linked by the rotating member of rotating member fix all rotating members；

Secondary ball is installed in the secondary annular recess of upper cover by step 6, and upper cover is positioned over mounted top layer and is consolidated Determine the upper surface of part, on upper lid fixed mounting hole it is corresponding with the fixed mounting hole of mounted fixing piece and pedestal, pass through Upper cover, all fixing pieces, pedestal are fixed on drive body by the modes such as nut together；

Pump line is installed in every layer of fixing piece and the corresponding arcuation gap of rotating member by step 7.

The utility model has the advantages that：The combined type peristaltic pump of the utility model, rotating member therein and right The fixing piece answered can be single layer, can also be multilayer, and different layers of peristaltic pumps are obtained by different layers of superpositions installation. Every layer can change corresponding port number by changing the length and quantity of arc-shaped groove in fixing piece.It is different by designing The number of plies obtain different multi-channel peristaltic pumps from every layer of port number.It, can by changing the size of the size and pump line of ball To obtain different fluid flow rate under same rotational speed.The loop ball of upper cover and floor installation can play intermediate rotating member It to the effect of support and positioning, prevents rotating member displacement from causing pump line compression deflection, while ensureing rotating member relative to fixation again When circular-rotation is done in part, the frictional force of rotating part and fixed support portion is reduced, reduces energy consumption.And multichannel may be implemented The independent assortment of peristaltic pump, including different pump line types, different port numbers, different installation directions.It is small, easy to use, spirit It is living, R＆D costs are reduced, convenient for integrated.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of wriggling supply unit；

Fig. 3 is the A-A direction views in Fig. 2.

Specific implementation mode

The combined type peristaltic pump in conjunction with shown in Fig. 1~3, the combined type peristaltic pump, including upper cover 30, pedestal 40 and position In between the two to four wriggling supply units, wriggling supply unit connects same transmission shaft, on each wriggling supply unit All there is the rotating member 1 with transmission axis connection, the rotating member 1 of four wriggling supply units to pass through mounting hole 15 and the universal driving shaft of linking Linkage.Also with 40 fixed fixing piece 2 of upper cover 30 and pedestal, pump line 3 is arranged between rotating member 1 and fixing piece 2.That is The fixing piece 2 is stackable to be fixed to pedestal 40, and the rotating member 1 is stackable and set is connected to transmission shaft, and the upper cover 30 is located at The upper surface of top layer's rotating member 1 and fixing piece 2.As shown in Figure 1, the utility model is for convenience, by rightmost side portion in figure Part is named as pedestal 40, and leftmost side component is named as upper cover 30.Such wriggling supply unit have independent conveying function, but by Same transmission shaft driving, and link with adjacent wriggling supply unit.Meet the wriggling supply unit concrete structure of this requirement very It is more, it can be existing structure, can also be further improved.

40 center of the pedestal is equipped with centre bore, and centre bore is more than transmission shaft diameter and is passed through for transmission shaft, is driven shaft rotation It does not rub with pedestal 40 when dynamic.40 periphery of the pedestal is equipped with fixed mounting hole 24, and pedestal 40 can pass through fixed mounting hole 24 installations are fixed on rack or stylobate.40 upper surface of the pedestal is equipped with secondary annular recess 44, continuous in secondary annular recess 44 Secondary ball 43 is filled, the section of secondary annular recess 44 is the ellipse that width is more than depth, and the height of groove is slightly larger than elliptical Short axle ensures that secondary ball 43 can be freely rotated in annular recess, while can be easily packed into groove again unlikely for secondary ball 43 In dropping out.Preferably, oval length is more than secondary ball 43 diameter about 0.2~0.4mm, and groove height is about the 1.2 of minor axis radius ~1.3 times.Secondary ball 43 uses corrosion-resistant and surface smoothness and the higher ceramic balls of precision.

The periphery that shaft mounting hole 11 is driven described in the rotating member 1 is equipped with multiple equally distributed linkage mounting holes 15, When multiple 1 stack combinations of rotating member, multiple rotating members 1 can be superimposed using universal driving shaft by the mounting hole 15 that links and be fixed, ensured The consistency that closely combines and link of multiple rotating members 1.It sets in each fixing piece 2 and is used for there are one rotating member retaining hole 21 Arrange rotating member 1.The periphery of the rotating member retaining hole 21 is equipped with multiple equally distributed fixed mounting holes 24, fixed mounting hole 24 position is corresponding with the fixed mounting hole 24 of the pedestal 40, can be by fixed mounting hole 24 by one or more fixing pieces 2 It is superimposed fixed frame or base station.

30 center of the upper cover be equipped with centre bore, centre bore be more than transmission shaft diameter, transmission shaft rotate when not with upper cover 30 Friction.30 periphery of the upper cover is equipped with fixed mounting hole 24, fixed mounting hole 24 and the fixing piece 2 and the pedestal 40 Fixed mounting hole 24 correspond to, upper cover 30 can install fixation together by fixed mounting hole 24 and fixing piece 2 and pedestal 40.Institute It states 30 lower surface of upper cover and is equipped with secondary annular recess 34, secondary ball 33 is continuously filled in secondary annular recess 34, secondary annular recess 34 Section is the ellipse that laterally disposed namely width is more than depth, and the height of secondary annular recess 34 is slightly larger than elliptical short Axis.Ensure that secondary ball 33 can be freely rotated in annular recess 34, while can be easily packed into groove again unlikely for secondary ball 33 In dropping out.Similar in pedestal 40, preferably oval length is more than ball diameter about 0.2~0.4mm, and groove height is about short 1.2~1.3 times of axis radius.Secondary ball 33 is preferably with corrosion-resistant and surface smoothness and the higher ceramic balls of precision.

The preferred structure of each wriggling supply unit is for example：In conjunction with shown in Fig. 2,3, including rotating member 1 and fixing piece 2, institute State rotating member 1 be it is discoid be referred to as short cylindric, disk outer ring is equipped with to hold around the equally distributed revolving body of central shaft It receives slot 13, revolving body 14 is disposed in revolving body holding tank 13, the rotating shaft of revolving body 14 is parallel with the central shaft of rotating member 1, The shape of revolving body holding tank 13 is coincide with revolving body 14, and 14 top of revolving body is revealed in outside rotating member 1.In the fixing piece 2 The heart is equipped with rotating member retaining hole 21, and rotating member 1 can be mounted on 2 center of fixing piece by rotating member retaining hole 21 and can be around Axis rotation.Rotating member retaining hole 21 is along the circumferential direction equipped with arc-shaped groove 22, and 22 cross section of arc-shaped groove is arc-shaped, 22 both ends of arc-shaped groove are separately connected leadout hole 23, and leadout hole 23 extends to except fixing piece 2.The fixing piece 2 with it is described Pump line 3 is equipped between rotating member 1.The revolving body 14 uniformly installed on rotating member 1 and the arc-shaped groove 22 on fixing piece 2 are right It answers, the pump line 3 is located in the arcuation gap area between 14 outer ring of revolving body and arc-shaped groove 22 Nei and from leadout hole 23 It extends to outside fixing piece 2, user is facilitated to position fixed by connector and connects outside liquid flow path.Arc-shaped groove 22 is transversal Face is not arc-shaped geometrically, but the arc of the installation of pump line 3 positioning for convenience.Fixing piece 2 can be whole Formula structure；It can also be two halves structure, be then fixed as one by mounting hole 24, processed convenient for arc-shaped groove 22.

The arc-shaped groove 22 can be that entirety shown in FIG. 1 is in semi arch or more than half arc-shaped, wrapping rotation The major part of 1 outer ring of part.Or arc-shaped groove 22 has multistage, and it is evenly spaced in 1 outer ring of rotating member, each section of arc-shaped is recessed 22 both ends of slot are separately connected the leadout hole 23 (not shown) for extending to 2 outer surface of fixing piece.Multiple pump lines can thus be assembled 3, as long as each pump line 3 is at least contacted and can be worked with a revolving body 14, and realizes and arrange multiple independences on a peristaltic pump Fluid passage.

1 center of the rotating member is equipped with transmission shaft mounting hole 11, and rotating member 1 is by being driven shaft mounting hole 11 and motor, liquid The rotation axis of the similar power device such as pressure motor is connected and fixed, and rotating member 1 is rotated under rotation axis drive when work；Specifically The connection types such as splined hole and spline fitted may be used.Preferably, the transmission shaft mounting hole 11 is T-type circular hole, that is, 11 cross section of transmission shaft mounting hole is the appearance that circle cuts marginal portion；Rotating member 1 can be socketed by T type circular holes in this way In the rotation axis of most of common motors, additional connector is not needed, reduces energy loss, it is compact-sized；If necessary In the case of, the shaft being driven in shaft mounting hole 11 can also be connected to the rotation axis of motor by retarder.

The revolving body 14 is, for example, spheroidal, oval spherical shape, capsule shape etc., is then grown if it is oval spherical and capsule shape The axis parallel of axis and rotating member 1.The preferably described rotating member 1 is spheroidal, that is, revolving body 14 is a ball, and ball is Surface flatness height and corrosion resistant high-precision ceramic balls, to reduce the caused energy loss that rubs in rotation process, simultaneously Revolving body 14 is reduced to greatest extent to wear caused pump line 3 in 3 extrusion process of pump line.The half of the revolving body holding tank 13 Diameter is more than the about 0.1~0.15mm of the revolving body 14, after having annular ditch groove 12, the height of the revolving body holding tank 13 About 1~3mm；That is after being passed through with 12 phase of annular ditch groove, 13 remaining thin-walleds of revolving body holding tank, the walled thickness Be exactly L in figure it is about 1~3mm.In this way so that the center base at the center of the revolving body 14 and the revolving body holding tank 13 Coincidence status is in sheet.The linear width at arcuation gap both ends is less than twice of 3 0.1~0.2mm of thickness of pump line.The arc-shaped Groove 22 is identical as the internal diameter of leadout hole 23, and the two intersection is connected using fillet, and radius of corner is the 1~2 of 3 outer diameter of pump line Times.

13 bottom position of revolving body holding tank in 1 outer ring of the rotating member is additionally provided with the annular ditch groove around central shaft 12, annular ditch groove 12 is connected to revolving body holding tank 13, and annular ditch groove 12 is perforation along the circumferencial direction of rotating member 1.It is described The 14 upper half end of revolving body being equipped in revolving body holding tank 13 is exposed to 1 outer ring of rotating member, and lower half end is located in annular ditch groove 12, Intermediate ends are located at turn around in body holding tank 13.The bottom end of the revolving body 14 contacts with the bottom surface of annular ditch groove 12 and is propped up by it Support.Lubricating oil or lubricating grease are filled in the annular ditch groove 12.Revolving body 14 can freely turn after being positioned in spherical groove It is dynamic, while its displacement in circumferencial direction is limited by groove curved surface, in bottom and 12 point contact of annular ditch groove.Revolving body 14 rotates When friction it is small, reduce energy loss, reduce peristaltic pump rotation needed for torque demand, convenient for pump micromation and multichannel.Together When, revolving body 14 can use very little size without using the roller structure with central shaft in conventional peristaltic pumps Revolving body 14, the arrangement between revolving body 14 can be approached, be produced to effectively reduce in 3 extrusion process of pump line to greatest extent Raw pulsation phenomenon.Annular ditch groove 12 can not only accommodate lubricating oil or lubricating grease plays lubricating action, while when process Machining accuracy can also be reduced, the spherical surface processing to 13 bottom of revolving body holding tank is avoided.

Individually the operation principle of wriggling supply unit is：It is located in 1 rotation process of rotating member on rotating member 1 and arc-shaped The revolving body 14 of 22 corresponding position of groove generates pump line 3 and squeezes, and liquid transports in drive tube body.Rotating member 1 stops operating Then pump line 3 is squeezed and is disappeared, tube fluid stops conveying.

Certainly, above-mentioned wriggling supply unit is illustrative, can also be the structure of other similar functions.

The utility model additionally provides the integrated positioning mounting means of said combination formula peristaltic pump, and steps are as follows：

Secondary ball 43 is installed in the secondary annular recess 44 of pedestal 40 by step 1, and by pedestal 40 sets be connected to transmission shaft；

Step 2 will install corresponding rotating member 1 (such as ball) in 1 spherical groove of first layer rotating member, then will rotation Part 1 is socketed on transmission shaft, the bottom surface of rotating member 1 and the pair on pedestal 40 in secondary annular recess 44 by being driven shaft mounting hole 11 Ball 43 contacts；

1 corresponding fixing piece 2 of first layer rotating member is installed on the outer of rotating member 1 by step 3 by rotating member retaining hole 21 It encloses, the fixed mounting hole 24 of fixing piece 2 is corresponding with the fixed mounting hole 24 of pedestal 40；

Step 4 repeats to install remaining rotating member 1 and corresponding fixing piece 2 according to step 2~3；

Step 5 is fixed all rotating members 1 by the linkage mounting hole 15 of rotating member 1；

Secondary ball 33 is installed in the secondary annular recess 34 of upper cover 30, and upper cover 30 is positioned over and has been installed by step 6 Top layer's fixing piece 2 upper surface, fixed mounting hole 24 in upper cover 30 and mounted fixing piece 2 and pedestal 40 are consolidated Determine the correspondence of mounting hole 24, upper cover 30, all fixing pieces 2, pedestal 40 are fixed on drive body together by modes such as nuts.

Pump line 3 is installed in 1 corresponding arcuation gap of every layer of fixing piece 2 and rotating member by step 7.

Assembly completes the agent structure of combined type peristaltic pump and then carries out the pump line dress on each wriggling supply unit Match, step includes：

Step 1, pump line 3 one end be connected to one end of two pass joint of pagoda type, diameter needs big at the center of two pass joints In 23 diameter of leadout hole；

3 end of pump line of not connected two pass joints is manually inserted by step 2 from one of leadout hole 23, is pumped at this time Pipe 3 will stretch to arc-shaped groove 22 along leadout hole 23, stop being manually inserted into when pump line 3 touches revolving body 14；

Step 3, rotation rotating member 1, revolving body 14 generate extruding to 3 part of pump line touched, and with rotating member 1 Rotation drives pump line 3 to extend advance in arc-shaped groove 22, is finally extend out to from another port of arc-shaped groove 22 Leadout hole 23 is simultaneously extend out to except the pump housing；

Step 4, rotating member 1 are rotated further, and revolving body 14 continues that pump line 3 is driven to move, final to connect the one of two pass joints End is stuck in the external port of leadout hole 23, completes the installation and fixation of peristaltic pump tube 3.

When needing replacing or removing pump line 3, two pass joints of 3 port of pump line can be removed, then in the rotation of rotating member 1 Lower removal pump line 3.

Claims (9)

1. a kind of combined type peristaltic pump, it is characterised in that：Including upper cover, pedestal and positioned at least two wrigglings between the two Supply unit, each wriggling supply unit connect same transmission shaft, have on each wriggling supply unit and transmission axis connection Rotating member, and with upper cover and the mutually fixed fixing piece of pedestal, the rotating member on adjacent wriggling supply unit keeps linkage, rotation Pump line is arranged between part and fixing piece.

2. combined type peristaltic pump according to claim 1, it is characterised in that：The wriggling supply unit shape is in cylinder Shape, the pedestal surface opposite with upper cover are equipped with secondary annular recess, equipped with secondary ball in secondary annular recess, close to pedestal and upper The rotating member of the wriggling supply unit of lid is contacted with secondary ball.

3. combined type peristaltic pump according to claim 2, it is characterised in that：The section of the pair annular recess is that width is big In the ellipse of depth, oval length is more than 0.2~0.4mm of secondary ball diameter, and groove height is the 1.2~1.3 of minor axis radius Times, secondary ball uses high-precision ceramic ball.

4. combined type peristaltic pump according to claim 1, it is characterised in that：The fixing piece of each wriggling supply unit Periphery is equipped with multiple equally distributed fixed mounting holes, the position of fixed mounting hole and the fixed installation on the pedestal and upper lid Hole site corresponds to, and upper cover, fixing piece and pedestal are fixed by fixed mounting hole.

5. the combined type peristaltic pump according to any one of Claims 1 to 4, it is characterised in that：The wriggling conveying In unit：The rotating member is discoid, and circumferential surface is equipped with equally distributed revolving body holding tank, is disposed in revolving body holding tank Revolving body, the rotating shaft of revolving body is parallel with the central shaft of rotating member, and shape and the revolving body of revolving body holding tank coincide, revolution Body top is revealed in outside rotating member；The fixing piece center is equipped with rotating member retaining hole, and rotating member is located in rotating member retaining hole, Rotating member retaining hole is along the circumferential direction equipped with arc-shaped groove, and arc-shaped groove cross section is arc-shaped, arc-shaped groove both ends It is separately connected the leadout hole for extending to fixing piece outer surface；The arc-shaped groove on revolving body and fixing piece installed on rotating member Corresponding, the pump line is located at turn around in the arcuation gap area between external circle and arc-shaped groove and is extended to from leadout hole solid Determine outside part.

6. combined type peristaltic pump according to claim 5, it is characterised in that：The revolving body is spheroidal, and by high-precision It spends Ceramic Balls to constitute, the revolving body holding tank is hemispherical groove.

7. combined type peristaltic pump according to claim 5, it is characterised in that：The radius of the revolving body holding tank is more than institute 0.1~0.15mm of revolving body is stated, the linear width at arcuation gap area both ends is less than twice of pump line 0.1~0.2mm of thickness, The arc-shaped groove is identical as the internal diameter of leadout hole, and the two intersection is connected using fillet, and radius of corner is the 1 of pump line outer diameter ~2 times.

8. combined type peristaltic pump according to claim 5, it is characterised in that：Outside the arc-shaped groove wrapping rotating member The major part of circle；Or arc-shaped groove has multistage, and it is evenly spaced in rotating member outer ring, each section of arc-shaped groove both ends point The leadout hole of fixing piece outer surface Lian Jie not extended to.

9. combined type peristaltic pump according to claim 8, it is characterised in that：Revolving body in the rotating member outer ring accommodates Trench bottom position is additionally provided with the annular ditch groove around central shaft, and annular ditch groove is connected to revolving body holding tank, and annular ditch groove edge turns The circumferencial direction of moving part is perforation, and revolving body upper half end is exposed to rotating member outer ring, and intermediate ends are located at turn around body receiving In slot, the bottom end of revolving body contacts and is supported by it with the bottom surface of annular ditch groove；In the annular ditch groove filled with lubricating oil or Lubricating grease.