CN215805089U - Pump head structure and peristaltic pump - Google Patents
Pump head structure and peristaltic pump Download PDFInfo
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- CN215805089U CN215805089U CN202122321071.XU CN202122321071U CN215805089U CN 215805089 U CN215805089 U CN 215805089U CN 202122321071 U CN202122321071 U CN 202122321071U CN 215805089 U CN215805089 U CN 215805089U
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Abstract
The utility model provides a pump head structure and a peristaltic pump, which comprise a pump head support and a tube wheel support arranged on one side of the pump head support, wherein a roller for extruding a pump tube is arranged on the roller support, one end of the roller support is hinged with the pump head support, the other end of the roller support is connected with the pump head support through a spring pin, the pump head support rotates during working, the roller pressurizes the pump tube, and meanwhile, the roller support rotates along the hinged end under the action of the spring pin, so that the pressure exerted by the roller on the pump tube is kept constant, the problem that the flexible pump tube is crushed is avoided, and the service life of the peristaltic pump head is prolonged.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a pump head structure and a peristaltic pump.
Background
In the blood separation process, blood is usually separated by a blood separation apparatus and a separation line. The blood pump draws blood out of the human body through a pipeline, the anticoagulant pump conveys anticoagulant into the whole blood through the pipeline, the blood is separated through the centrifugal machine, and finally the separated blood is conveyed back to the human body. The pump head is used as an important part of the pump and consists of a pressing block, a support, a body and a roller, and the pump head periodically extrudes different positions of the flexible pump tube through the roller to ensure that the extrusion position continuously advances forwards along the advancing direction of blood, thereby realizing the pumping purpose.
The roller and the axle sliding friction in the existing pump head are not flexible enough, each part in the pump head can not creep, the problem that the flexible pump pipe is squeezed and cracked frequently appears and the pump pipe falls into the bottom of the pump groove is solved, the pump pipe needs to be frequently assembled and disassembled, the working efficiency is low, secondly, the roller pressing material is mostly made of plastic or steel and wrapped with a layer of soft rubber, the material has the defect of easy aging, and the service life of the pump head is influenced.
In addition, the pump cover of existing pump head adopts flip formula more, sets up the sensor on the pump cover, closes through the pump cover and determines whether the pump head is ready, need open many times in the operation and close the pump cover, and the pipeline is dismantled inconveniently, and the pump cover goes wrong in response trouble, wrong report trouble sometimes, influences blood collection.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a pump head structure of a peristaltic pump, which effectively solves the problem that all parts in the pump head cannot creep and is convenient for disassembling a pump pipe.
The utility model is realized by the following technical scheme:
a pump head structure comprises a pump head bracket, a motor and a motor driving mechanism, wherein the pump head bracket is connected with a motor output shaft, and the motor output shaft drives the pump head bracket to rotate;
the roller supports are rotatably connected with the pump head support, and the free ends of the roller supports can perform simple pendulum motion along the rotating ends;
the hard rollers are arranged in pairs with the roller support and connected with the roller support, and extrude the pump pipe when the roller support swings towards one side of the pump head support, so that the pump pipe forms a closed section point, and the hard rollers and the pump pipe form the closed section point alternately.
Preferably, the pump head further comprises an elastic device arranged between the pump head bracket and the roller bracket, and when the hard roller presses the pump pipe, the elastic device applies pressing force to the roller bracket.
Preferably, the pump head support and the roller support are provided with positioning devices, and two ends of the elastic device are respectively connected with the positioning devices.
Preferably, the hard roller comprises a hard roller sleeve and a bearing;
the bearing sleeve is arranged on the rotating shaft, the rotating shaft is connected with the roller bracket, and the hard roller sleeve is arranged on the bearing.
Preferably, the motor output shaft is provided with a positioning shaft and can move along the axial direction of the positioning shaft;
the motor output shaft is provided with a positioning component and can move along the radial direction of the output shaft;
the positioning shaft is provided with a guide surface, the guide surface is used for driving the positioning component to move, and when the positioning component is simultaneously contacted with the motor output shaft and the pump head support, the axial positioning of the motor output shaft is realized.
Preferably, a first positioning component is arranged on the output shaft of the motor;
the pump head support is provided with a second positioning structure matched with the first positioning part;
when the motor output shaft is connected with the pump head support, the first positioning component is connected with the second positioning structure, and the pump head support and the motor output shaft rotate synchronously.
Preferably, a one-way structure is arranged on the output shaft of the motor and used for enabling the pump head support to rotate in a one-way mode.
Preferably, a pump cover is arranged at the top of the pump head support.
Preferably, the pump cover is provided with a boss for disassembling the pump pipe, and when the pump pipe is disassembled, the boss is used as a supporting point of the pump pipe, and the pump pipe slides around the boss.
A peristaltic pump comprises the pump head structure.
Compared with the prior art, the utility model has the following beneficial technical effects:
the utility model provides a pump head structure of a peristaltic pump, which comprises a pump head support and roller wheel supports arranged on two sides of the pump head support, wherein hard roller wheels for extruding a pump pipe are arranged on the roller wheel supports, one ends of the roller wheel supports are hinged with the pump head support, the other ends of the roller wheel supports are connected with the pump head support through elastic devices, the pump head support rotates when the peristaltic pump works, the hard roller wheels extrude the pump pipe, and meanwhile, the roller wheel supports rotate along the hinged ends under the action of the elastic devices to realize the peristaltic action of the roller wheels, so that the pressure exerted by the roller wheels on the pump pipe is kept constant, the problem that the flexible pump pipe is squeezed and cracked is avoided, and the service life of the peristaltic pump head is prolonged.
Furthermore, a connecting assembly is arranged on the motor output shaft, and the position of the steel ball is controlled through a positioning shaft, so that the pump head and the motor output shaft can be quickly disassembled and assembled.
Furthermore, the pump cover is provided with a boss which is used as a supporting point, so that the pump pipe in the pump groove can be conveniently detached.
Drawings
FIG. 1 is a front view of the peristaltic pump head construction of the present invention;
FIG. 2 is a left side view of the peristaltic pump head construction of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is an exploded view of the peristaltic pump head construction of the present invention;
fig. 6 is a schematic structural diagram of the pump cover of the present invention.
In the figure: 1. a pump cover; 1-1, a rubber cover; 1-2, pump head cover; 2. a pump head support; 2-1, a rotating shaft guide sleeve; 2-2, spring holes; 3. a roller bracket; 4. hard rollers; 4-1, roller sleeves; 4-2, guiding a sleeve; 4-3, a bearing; 4-4, spacer bush; 5. a pin shaft; 6. a gasket ring; 7. a spring guide pin; 8. a spring; 9. a clamping assembly; 9-1 steel ball; 9-2 positioning the shaft; 9-3 compression spring; 9-4 limiting plunger; 10. a unidirectional structure; 11 boss.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
As shown in fig. 1 to 6, a pump head structure includes a pump cover 1, a pump head bracket 2, a roller bracket 3, and a rigid roller 4.
The two ends of the pump head support 2 are respectively provided with a rotating shaft hole, the two rotating shaft holes are arranged along the opposite angles of the pump head support 2, the axial direction of the rotating shaft hole is parallel to the axial direction of the pump head support, the upper end and the lower end of the rotating shaft hole are respectively nested with a rotating shaft guide sleeve 2-1, and one end of the roller support 3 is connected with the rotating shaft guide sleeve 2-1 through a pin shaft 5, so that the roller support 3 can rotate along the pin shaft 5.
The elastic device is a spring pin and comprises a spring guide pin 7 and a spring 8, a horizontal spring hole 2-2 is formed in the side wall of the pump head support 2, the spring is located in the spring hole, the end part of the spring guide pin 7 penetrates through the side wall of the roller support and extends into the spring hole, the end part of the spring guide pin 7 is connected with the bottom of the spring hole through threads, the other end of the spring guide pin is connected with the side wall of the roller support, a gasket ring 6 is arranged between the end part of the spring guide pin 7 and the side wall of the roller support, when the pump head works, the roller extrudes a hose, the spring is compressed, the roller support 3 rotates along a pin shaft 5, when the roller is separated from the hose, the roller support 3 resets under the action of elasticity, the spring guide pin is limited to the roller support 3, and the peristaltic motion of the pump head is realized.
The center of pump head support 2 is provided with the centre bore, and the both sides of pump head support 2 bottom are provided with the fixed station along the centre bore symmetry for hose in the fixed pump, nested spring spacer on the inner wall in spring hole.
The section of the roller bracket 3 is of a C-shaped structure, an inner cavity formed by the opening is a rectangular groove, the edges of an upper supporting plate and a lower supporting plate of the roller bracket 3 are arc-shaped, holes for installing roller rotating shafts are formed in the upper supporting plate and the lower supporting plate, the roller sleeves are arranged on the rotating shafts, and two ends of the rotating shafts are connected with rotating shaft holes.
The roller 4 comprises a roller sleeve 4-1, a guide sleeve 4-2, a bearing 4-3 and a spacer 4-4, a plurality of bearings are sleeved on a rotating shaft, the spacer 4-4 is arranged between the bearings, the guide sleeve 4-2 is sleeved at two ends of the rotating shaft, and the roller sleeve 4-1 is sleeved on the bearing, the guide sleeve and the spacer.
The upper part of the roller sleeve 4-1 is a conical surface, the lower part is a cylindrical surface, the height of the cylindrical surface is greater than that of the conical surface, and the radius of the top end surface of the conical surface is smaller than the circular radius of the bottom end surface of the cylindrical surface.
Be provided with the motor output shaft in pump head support 2's the centre bore, be provided with first locating component on the motor output shaft, be provided with on the pump head support with first locating component complex second location structure, the motor output shaft is connected with pump head support 2 through first locating component and second location structure, with power transmission to pump head support 2, and then drives the gyro wheel support and rotate.
First locating component and second location structure are locating pin and draw-in groove respectively, and the locating pin sets up on the periphery of motor output shaft, and the draw-in groove sets up on the inner wall of pump head support centre bore tip, and this draw-in groove is U type groove, and the opening side in U type groove is located the tip of central point, and when pump head support and motor output shaft connection, then the tip of locating pin is arranged in the draw-in groove, makes pump head support and motor output shaft synchronous rotation.
The motor output shaft is provided with a clamping assembly 9 for mounting or dismounting the motor output shaft and the pump head support, and the clamping assembly 9 comprises a positioning shaft 9-2, a steel ball 9-1, a compression spring 9-3 and a limiting plunger 9-4.
The end part of the output shaft of the motor is provided with a coaxial shaft hole, the compression spring is arranged at the bottom of the shaft hole, the limiting plunger piston 9-4 is connected with the opening part of the shaft hole through threads, the positioning shaft 9-2 is arranged in the shaft hole, one end of the positioning shaft extends out of the limiting plunger piston 9-4, and the positioning shaft can axially move in the shaft hole.
The motor output shaft is provided with a positioning hole along the radial direction, the steel ball 9-1 is arranged in the positioning hole and can slide, the inner wall of the central hole of the pump head support 2 is provided with a positioning groove matched with the steel ball, the side wall of the positioning shaft is provided with a conical positioning surface, when the conical positioning surface extrudes the steel ball, the steel ball is positioned in the positioning groove, the connection and positioning of the motor output shaft and the pump head support 2 are realized, when the pump head support is required to be separated from the motor output shaft, the positioning shaft is pressed to compress the spring, the conical positioning surface of the positioning shaft is separated from the positioning ball, meanwhile, the motor output shaft is driven to withdraw from the central hole of the pump head support under the elastic force of the spring, the positioning pin is separated from the clamping groove in the withdrawing process, the steel ball enters the positioning hole, and the quick detachment of the motor output shaft and the pump head support 2 is realized.
The conical positioning surface is an annular conical surface, the positioning groove is an annular groove, the cross section of the positioning groove is arc-shaped or V-shaped, and the opening side of the positioning groove is opposite to the steel ball.
Still be equipped with one-way structure 10 on the motor output shaft, one-way structure 10 is located the centre bore of pump head support, and one-way structure 10 is used for making pump head support unidirectional rotation, needs to explain, when adopting to structure 10, then the output shaft of motor and pump head support need not be connected through the locating pin.
The one-way structure is one-way clutch, realizes motor output shaft's transmission moment and one-way location through one-way clutch, prevents the effect of motor output shaft reversal, makes this peristaltic pump become the one-way pump, and when the motor reversal, the pump head can not the reversal yet to avoid the harm that the reversal brought under certain scene, for example: a one-way pump is adopted in an anticoagulant pump of the centrifugal blood component separator, so that the supply of anticoagulant is ensured, and coagulation is prevented.
The pump cover 1 comprises a pump head cover 1-2 and a rubber cover 1-1, the pump head cover 1-2 is connected with the top surface of the pump head support through a buckle, a central hole is formed in the top of the pump head cover 1-2, the rubber cover 1-1 is located in the central hole, and a boss 11 used for detaching a hose is arranged on the side wall of the pump head cover 1-2.
Under the operating condition, the hose is arranged in the pump groove of the pump base, the center of the pump base is provided with a cavity for placing a pump head, the pump groove is arranged on the side wall of the cavity, the hose in the pump groove is extruded through the rollers to extract liquid, namely the hose is arranged in a gap between the side wall of the cavity and the pump head, the disassembly is difficult due to the narrow gap, a boss is arranged on the pump cover and serves as a positioning support point of the hose, when the hose is disassembled, the side wall of the boss is bypassed from bottom to top by one end of the hose, the side wall of the hose is contacted with the side wall of the boss, the hose pump head is pulled upwards to rotate, the boss serves as a support point in the rotating process, the hose is pulled out from the pump groove, and the hose is quickly disassembled.
The working principle of the pump head structure of the peristaltic pump provided by the utility model is explained in detail below.
Working principle of peristaltic pump head
The peristaltic pump head is whole circular, the hose walks around the pump head in the pump and arranges the pump groove in, motor output shaft drives pump head support and rotates, realize the whole rotation of pump head, a plurality of stereoplasm gyro wheels extrude the hose in proper order and form closed intercept point when the pump head rotates, the stereoplasm gyro wheel continues the rotation spring compression, the gyro wheel support rotates along the round pin axle, make the stereoplasm gyro wheel continue to extrude the hose, closed point follows stereoplasm gyro wheel 4 and removes, after gyro wheel and hose separation, reset as lower gyro wheel at the spring, will form the vacuum in the pumpability hose, thereby inhale the fluid, and be extruded by next stereoplasm gyro wheel 4. And in the extrusion process, the roller support and the spring of the pump head support compress and return to realize peristaltic extrusion of peristaltic liquid of the pump head in the pump pipe, thereby achieving the purpose of pumping fluid.
The principle of disassembling the motor output shaft and the peristaltic pump head is as follows:
disassembling process
The spring of the positioning shaft is pressed to be compressed, the conical positioning surface is separated from the steel ball, when the motor output shaft exits from the pump head support, the steel ball is extruded by the positioning groove to move towards the center of the motor output shaft and is separated from the positioning groove, the motor output shaft exits from the center hole of the pump head support under the elastic force of the spring, the positioning pin is separated from the clamping groove in the exiting process, and therefore the motor output shaft and the peristaltic pump head are rapidly detached.
Installation process
The spring of the positioning shaft is pressed to be compressed, the conical positioning surface is separated from the steel ball, the steel ball enters the positioning hole, the motor output shaft is assembled in the center hole of the pump head support, the positioning shaft resets under the action of the spring, the steel ball is extruded by the conical positioning surface, the other end of the steel ball is abutted to the positioning groove, and meanwhile the end of the positioning pin is located in the clamping groove, so that the connection between the motor output shaft and the pump head support is achieved.
According to the peristaltic pump head structure, the spring structure is arranged between the pump head support and the roller support, so that the roller support can wriggle in the liquid pumping process, and the liquid pipeline is prevented from being squeezed and cracked. Through the use of neotype peristaltic pump head, improve the peristaltic pump performance, increase of service life has brought the high efficiency for blood separation, has realized the structural wriggling of pump head. Secondly, the roller sleeve made of hard material, such as steel material, is arranged outside the roller, and the bearing is arranged inside the roller, so that the roller can extrude different positions of the hose in the pump according to the preset driving requirement, and the extruded position continuously advances forwards along the blood advancing direction, thereby realizing the pumping purpose.
In addition, a clamping assembly 9 is installed in the motor output shaft, when the positioning shaft is pressed down, the steel balls roll into the positioning holes, the pump head and the motor shaft are unlocked, the steel balls reset into the positioning grooves under the action of the compression spring, and the pump head and the motor output shaft are locked, so that the pump head can be conveniently assembled and disassembled.
Finally, pass through the buckle with pump cover and pump head support and be connected, the pump cover becomes an organic whole with the pump head, need not close or open the pump cover when gathering at every turn, and the operation is very convenient, and the boss that the pump head was covered can help the staff to demolish hose in the pump fast. The supporting table is arranged at the bottom of the pump head support, so that the fixing of the hose in the pump can be conveniently realized, the hose in the pump is fixed at the height, the hose in the pump is prevented from falling into the bottom of the pump groove, and the influence on the external factors of blood separation is reduced.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A pump head structure, comprising,
the pump head support is connected with a motor output shaft, and the motor output shaft drives the pump head support to rotate;
the roller supports are rotatably connected with the pump head support, and the free ends of the roller supports can perform simple pendulum motion along the rotating ends;
the hard rollers are arranged in pairs with the roller support and connected with the roller support, and extrude the pump pipe when the roller support swings towards one side of the pump head support, so that the pump pipe forms a closed section point, and the hard rollers and the pump pipe form the closed section point alternately.
2. A pump head construction according to claim 1, further comprising resilient means disposed between the pump head carriage and the roller carriage, the resilient means exerting a squeezing force on the roller carriage when the rigid roller squeezes the pump tube.
3. A pump head construction according to claim 2, wherein the pump head support and the roller support are provided with locating means, and the resilient means is connected at each end to the locating means.
4. A pump head construction according to claim 1, wherein the rigid roller comprises a rigid roller sleeve and a bearing;
the bearing sleeve is arranged on the rotating shaft, the rotating shaft is connected with the roller bracket, and the hard roller sleeve is arranged on the bearing.
5. A pump head construction according to claim 1, wherein the motor output shaft is provided with a positioning shaft and is movable axially therealong;
the motor output shaft is provided with a positioning component and can move along the radial direction of the output shaft;
the positioning shaft is provided with a guide surface, the guide surface is used for driving the positioning component to move, and when the positioning component is simultaneously contacted with the motor output shaft and the pump head support, the axial positioning of the motor output shaft is realized.
6. A pump head construction according to claim 1, wherein the motor output shaft is provided with a first locating feature;
the pump head support is provided with a second positioning structure matched with the first positioning part;
when the motor output shaft is connected with the pump head support, the first positioning component is connected with the second positioning structure, and the pump head support and the motor output shaft rotate synchronously.
7. A pump head arrangement as claimed in claim 6, wherein the motor output shaft is provided with a one-way arrangement, the one-way arrangement (10) being arranged to provide one-way rotation of the pump head support.
8. A pump head construction according to claim 1, wherein a pump cover is provided on top of the pump head mount.
9. A pump head construction according to claim 8, wherein the pump cover is provided with a projection for removal of the pump tube, the projection serving as a support point for the pump tube when the pump tube is removed, the pump tube sliding around the projection.
10. A peristaltic pump comprising a pump head construction as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122321071.XU CN215805089U (en) | 2021-09-24 | 2021-09-24 | Pump head structure and peristaltic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122321071.XU CN215805089U (en) | 2021-09-24 | 2021-09-24 | Pump head structure and peristaltic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215805089U true CN215805089U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122321071.XU Active CN215805089U (en) | 2021-09-24 | 2021-09-24 | Pump head structure and peristaltic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215805089U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320852A (en) * | 2022-02-15 | 2022-04-12 | 赛若麦得（上海）生物技术有限公司 | Pump head structure capable of being rapidly assembled and disassembled |
| CN114526220A (en) * | 2022-02-21 | 2022-05-24 | 常州普瑞流体技术有限公司 | Quick-mounting tube type peristaltic pump |
-
2021
- 2021-09-24 CN CN202122321071.XU patent/CN215805089U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320852A (en) * | 2022-02-15 | 2022-04-12 | 赛若麦得（上海）生物技术有限公司 | Pump head structure capable of being rapidly assembled and disassembled |
| CN114526220A (en) * | 2022-02-21 | 2022-05-24 | 常州普瑞流体技术有限公司 | Quick-mounting tube type peristaltic pump |
| CN114526220B (en) * | 2022-02-21 | 2023-10-27 | 常州普瑞流体技术有限公司 | Quick-mounting tube peristaltic pump |
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