WO2015067070A1 - 一种用于流体精密定量输送的直线型蠕动泵 - Google Patents

一种用于流体精密定量输送的直线型蠕动泵 Download PDF

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Publication number
WO2015067070A1
WO2015067070A1 PCT/CN2014/082729 CN2014082729W WO2015067070A1 WO 2015067070 A1 WO2015067070 A1 WO 2015067070A1 CN 2014082729 W CN2014082729 W CN 2014082729W WO 2015067070 A1 WO2015067070 A1 WO 2015067070A1
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WIPO (PCT)
Prior art keywords
fixed
base
hose
peristaltic pump
slider
Prior art date
Application number
PCT/CN2014/082729
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English (en)
French (fr)
Inventor
储江波
Original Assignee
常州普瑞流体技术有限公司
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Filing date
Publication date
Application filed by 常州普瑞流体技术有限公司 filed Critical 常州普瑞流体技术有限公司
Priority to ES14850094T priority Critical patent/ES2746998T3/es
Priority to US14/440,224 priority patent/US9828983B2/en
Priority to EP14850094.5A priority patent/EP2894334B1/en
Publication of WO2015067070A1 publication Critical patent/WO2015067070A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1223—Machines, pumps, or pumping installations having flexible working members having peristaltic action the actuating elements, e.g. rollers, moving in a straight line during squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the present invention relates to a peristaltic pump, and more particularly to a peristaltic pump for precisely metering a fluid. Background technique
  • a peristaltic pump is like holding a fluid-filled hose with your fingers, moving forward as the finger slides forward.
  • the peristaltic pump is also the principle that the finger is replaced by a roller.
  • the fluid is pumped by alternately squeezing and releasing the pump's flexible delivery hose. Just like pinching a hose with two fingers, as the finger moves, a negative pressure builds up inside the tube and the liquid flows.
  • a peristaltic pump is a "pillow" shaped fluid that forms a pump tube between two rollers. In industrial production, in many cases it is necessary to add liquid to the production unit by means of a peristaltic pump, so that liquid remains in the hose or the liquid is not quickly fed through the hose.
  • Chinese invention patent CN 203161500 U discloses a linear peristaltic pump including a frame, a lifting device, an infusion device, an infusion hose, a linear drive module, a through-off valve and a squeeze roller assembly, and a linear drive mold assembled in the machine.
  • the infusion device is connected with the lifting device, the on-off valve is fixedly connected to the frame, the infusion hose is installed on the infusion device, and passes through the on-off valve, and the squeeze roller assembly is attached to the linear drive module.
  • the invention improves the service life of the infusion hose, takes up less space, and improves the accuracy of liquid delivery.
  • this invention does not allow precise control of the transport liquid, and in addition, the invention does not have good backflow prevention. Summary of the invention
  • a linear peristaltic pump for precisely metering a fluid includes a base on which a side seat for fixing a hose is disposed, and a linear reciprocating motion is disposed under the hose. mechanism;
  • the linear reciprocating mechanism is provided with a sliding rod base, the upper end of the sliding rod base is fixed with a sliding rod base shaft, and the sliding rod base shaft is sleeved with a slider; the upper end of the sliding rod is provided for a squeezing hose, a roller for moving the fluid in the tube forward, the roller being in contact with the hose, wherein the base is provided with a slide rod base position detecting device;
  • a guide rod parallel to the hose is fixed on the side seat, and the through hole is adapted to be adapted to the guide rod, the guide rod passes through the through hole in the slider, and both ends of the guide rod
  • the slider is connected to the upper and lower moving device; and the anti-reflux device is fixed on the base beside the linear reciprocating mechanism.
  • the linear reciprocating mechanism includes a rotating electrical machine fixed on the base, and the rotating shaft of the rotating electrical machine is connected to the lead screw through a coupling, and the lead screw is disposed under the guiding rod and parallel to the guiding rod;
  • the spindle is provided with a linearly movable nut which is fixed to the slider base.
  • a screw cover is disposed between the silk nut and the base of the slider.
  • the slider up and down moving device comprises a connecting seat fixed at two ends of the guiding rod, the left guiding rod connecting seat is rotatably connected with the base, and the right guiding rod connecting seat is rotatably connected with the driving piece;
  • the driven gear is fixed, the driven gear meshes with the main gear, and the driving gear is fixed on the first motor rotating shaft.
  • the slider base position detecting device comprises a photoelectric switch fixed on the base below the two ends of the screw and a photoelectric spacer fixed under the base of the slider.
  • the backflow prevention device includes a second motor fixed on the sliding sleeve bracket, a transmission block is fixed on the rotating shaft of the second motor, and a clamping tube fixing block is fixed on the transmission block, and the clamping tube is fixed Piece a sliding sleeve shaft passing through the sliding sleeve bracket is fixed on the other end, and a clamping tube cap for clamping and cutting the tube is fixed at the other end of the sliding sleeve shaft; a clamping tube cap is arranged between the clamping tube fixing block and the base Position detection device.
  • the pinch cap position detecting device comprises a photoelectric spacer fixed under the pinch fixing block and a photoelectric switch fixed on the base and adapted to the photoelectric spacer.
  • a pinch shaft is disposed under the pinch fixing block, and the limiting shaft is fixed on the sliding sleeve bracket.
  • a cover plate is fixed on the side seat above the hose.
  • the linear working principle is innovated, and the structure of the conventional rotary peristaltic pump is changed.
  • the hose wear is extremely small, and the risk of the inner wall falling off is greatly reduced; the disassembly and assembly of the hose is extremely simple, which is conducive to disinfecting and cleaning the bacteria; the liquid is not in contact with the equipment, and is safer and more sanitary.
  • the capacity adjustment is extremely simple, the batch is repeated and the stability is high; the slow start can be set to prevent splashing or foaming, and the stop and suck back can be realized.
  • Figure 1 is a general assembly drawing of the present invention.
  • FIGS. 2a and 2b are schematic views showing the structure of a linear reciprocating mechanism and a slider up-and-down moving device of the present invention.
  • FIG 3 is a schematic structural view of a screw cover of the present invention.
  • 4a and 4b are schematic views showing the structure of the slider of the present invention.
  • 5a-5c are schematic structural views of a backflow prevention device of the present invention.
  • 6a-6e are schematic views of the working process of the present invention.
  • 1 is the base
  • 2 is the rotating motor
  • 3 is the screw
  • 4 is the sliding rod base
  • 5 is the guiding rod
  • 6 is the hose
  • 7 is the hose joint
  • 8 is the screw cover
  • 9 is the slider 10 is the slider base cover
  • 11 is the transmission piece
  • 12 is the driven gear
  • 13 is the main gear
  • 14 is the first motor
  • 15 is the left guide connecting seat
  • 16 is the right guiding rod connecting seat
  • 17 is the sliding rod base shaft
  • 18 is the connecting bracket
  • 19 is the second Motor
  • 20 is the sliding sleeve bracket
  • 21 is the limiting shaft
  • 22 is the clamping tube fixing block
  • 23 is the sliding sleeve shaft
  • 24 is the clamping tube cap
  • 25 is the transmission block
  • 26 is the transmission shaft
  • 27 is the bearing
  • 28 is the left Side seat
  • 29 is the right seat
  • 30 is the cover
  • 31 is the coupling
  • 32 is the photoelectric switch
  • 33 is the photoelectric spacer
  • 301 is the thread mother
  • 901 is the rotating shaft
  • 902 is the through hole
  • 903 is the roller.
  • a linear peristaltic pump for precise quantitative delivery of a fluid includes a base 1 on which a side seat for fixing a hose 6 is provided, which includes a left side seat 28 and The right side seat 29, the hose 6 is fixed between the left side seat 28 and the right side seat 29.
  • a hose joint 7 for connecting the infusion tube is connected to both ends of the hose 6.
  • a cover plate 30 is fixed between the left side seat 28 and the right side seat 29 above the hose, and the cover plate 30 is excellent in protecting the hose 6 from damage.
  • a linear reciprocating mechanism is disposed below the hose 6.
  • the linear reciprocating mechanism used in the present invention comprises a rotary electric machine 2 fixed to the base 1, and the rotating shaft of the rotary electric machine 2 is connected to the lead screw 3 via a coupling 31.
  • the lead screw is disposed below the guide rod 5 in parallel with the guide rod 5, and the guide rod 5 is parallel to the hose 6.
  • the lead screw 3 is provided with a linearly movable nut 301.
  • the nut 301 is fixed to the sliding rod base 4, and the overall guiding of the main body 301 and the sliding rod base 4 can be driven by the rotation of the lead screw 3.
  • the lever 5 moves forward.
  • the rotary motor 2 drives the lead screw 3 to rotate, and the slide base 4 is adapted to the lead screw, so that the slide base 4 can linearly reciprocate along the lead screw.
  • the rotary motor 2 can be driven to move the slide base 4 under the hose in a linear direction parallel to the hose, and naturally, the rotation amount of the screw can be controlled by the rotary motor 2, thereby controlling the slide base and the slider.
  • the overall amount of movement in turn, precisely controls the amount of liquid transport.
  • a screw cover 8 is fixed between the lead screw 3 and the slider base 4, and the structure of the screw cover 8 is as shown in FIG.
  • the lead screw 3 and the nut 301 are inside the lead screw cover 8, and the slider base 4 is inserted into the screw cover 8 from both sides of the lead screw cover 8 to be fixed to the nut 301.
  • dust can be effectively prevented from falling into the lead screw 3, so that the lead screw can work well for a long time, and on the other hand, the linear reciprocating motion of the slider base 4 can be guided.
  • the upper end of the slider base 4 is fixed with a slider base cover 10, and the slider base cover 10 is fixed with a slider base shaft 17, and the slider base
  • the seat shaft 17 is sleeved with a slider 9, and the slider 9 is movable up and down along the slider base shaft 17.
  • the upper end of the slider 9 is provided with a rotatable roller 903, and the roller 903 is fixed on a rotating shaft 901 passing through the upper end of the slider 9, so that the slider 9 can revolve around the rotating shaft 901.
  • the roller 903 is in contact with the hose 6, so that the state in which the slider 9 presses the hose 6 and releases the hose 6 can be achieved by moving the position of the slider 9 up and down.
  • the slider 9 is provided with a through hole 902 adapted to the guide rod 5, and the guide rod has two, and the two guide rods are parallel.
  • the guide rod passes through a through hole 902 in the slider 9, and both ends of the guide rod are connected to the slider up and down moving device.
  • the slider up and down moving device includes a connecting seat fixed at two ends of the guiding rod 5.
  • the left guiding rod connecting seat 15 is rotatably connected to the base through a connecting bracket 18, and the right guiding rod is connected.
  • the seat 16 is rotatably coupled to the drive piece 11.
  • the drive piece 11 is fixed to the driven gear 12, and the driven gear 12 meshes with the main gear 13, and the drive gear 13 is fixed to the rotating shaft of the first motor 14.
  • the base is provided with a slider base position detecting device, and the slider base position detecting device includes a photoelectric switch 32 fixed on the base of the two ends of the screw and fixed to the slider base.
  • the rotary motor 2 drives the lead screw 3 to move the slider base 4 to the right; when the right photoelectric switch detects the slider base 4, the rotary motor 2 drives The lead screw moves the slider base 4 to the left.
  • a backflow prevention device is fixed to the right side of the linear reciprocating mechanism.
  • the backflow prevention device includes a second motor 19 fixed to the sliding sleeve bracket 20, and a transmission block 25 is fixed on the rotating shaft of the second motor 19, and the transmission block 25 is fixed on the transmission block 25.
  • the transmission block 25 is fixed to the shaft of the second motor 19 via a transmission shaft 26, and a bearing 27 is disposed between the transmission shaft 26 and the transmission block 25.
  • the second motor 19 drives the transmission block 25 to rotate, thereby driving the upper and lower movements of the pinch fixing block 22, the sleeve shaft 23 and the pinch cap 24.
  • the second motor 19 is activated, causing the pinch cap 24 to move up the compression hose 6, so that the liquid in the hose 6 does not flow back.
  • a pinch cap position detecting device is disposed between the pinch fixing block 22 and the base 1.
  • the pinch cap position detecting device as shown in Figs. 5a and 6a includes a photoelectric spacer 33 fixed under the pinch fixing block 22 and a photoelectric switch 32 fixed to the base and adapted to the photoelectric spacer.
  • the photoelectric spacer 33 and the photoelectric switch 32 are staggered and separated, thereby realizing the detection of the pinch cap 24 up and down. The location of the move.
  • a limited position shaft 21 is disposed under the pinch tube fixing block, and the limit axis is fixed to the sleeve holder 20.
  • Figure 6a is the initial state of the present invention
  • the slider base 4 and the slider 9 are integrally located on the left side of the base 1, and the transmission piece 11 connecting the guide bars 5 is in an inclined state, the slider base
  • the distance between the seat cover 10 and the slider 9 is short, and the slider 9 does not press the hose 6.
  • Fig. 6b is a schematic view of the rotary motor 2 driving the slider base 4 and the slider 9 to integrally press the hose to the right.
  • the first motor 14 of the slider up and down moving device is activated, and the driving piece 11 is rotated by the cooperation of the driven gear 12 and the driving gear 13, so that the driving piece 11 is in a vertical position, so that the slider 9 moves upward, the slider base
  • the distance between the cover 10 and the slider 9 becomes long, which is visible by the difference in the exposed length of the slider base shaft 17 in Figs. 6a and 6b.
  • the rotary motor 2 drives the lead screw 3 to rotate, so that the entire slider base 4 and the slider 9 are moved to the right, the slider 9 presses the hose 6, and the slider 9 presses the hose 6 from left to right. Liquid.
  • Fig. 6c shows that the slider base 4 is moved to the rightmost side of the screw 3. At this time, the photoelectric switch 32 on the right side of the screw is blocked by the photoelectric spacer 33 under the slider base 4, and the slider base 4 is detected. Move to the far right of the screw 3. Control the rotary motor 2 to stop working.
  • the second motor 19 is actuated to drive the overall movement of the pinch fixing block 22, the sleeve shaft 23 and the pinch cap 24 upward (through Figs. 6c and 6d).
  • the exposed length of the sleeve shaft 23 between the middle clamp cap 24 and the sleeve holder 20 is visible, so that the clamp cap 24 presses the hose 6 to prevent backflow of liquid.
  • the first motor 14 is activated, and the main gear 13 drives the driven gear 12 to rotate, so that the guide rod 5 moves downward, and the slider 9 on the guide rod 5 moves downward at the same time.
  • Slider 9 Moves down the slider base shaft 17.
  • the slider 9 is disengaged from the hose 6 without contact, and then the rotary motor 2 is activated to reversely drive the lead screw, thereby driving the slider base 4 and the slider 9 to move to the left as a whole.
  • the photoelectric switch 32 on the left side of the base is blocked by the photoelectric spacer 33 below the slider base 4, and it is detected that the slider base 4 is moved to the leftmost side of the screw 3.
  • the second motor 19 is activated to drive the overall movement of the pinch fixing block 22, the sleeve shaft 23 and the pinch cap 24 downward, so that the device as a whole returns to the state of Fig. 6a.
  • linear reciprocating mechanism of the present invention can also adopt a thread pair or a combination of a rack and a gear.
  • the slider base position detecting device can also adopt a flap and a stroke switch, and such conversions fall within the protection scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

一种蠕动泵，特别是一种用来精密定量输送流体的蠕动泵，包括底座（1），底座（1）上设置有固定软管（6）用的侧座（28，29），软管（6）下方设置有直线往复运动机构；直线往复运动机构上设置有可上下移动用来松开或压紧软管（6）的滑块（9），直线往复运动机构旁的底座上固定有防回流装置。这种蠕动泵不同于传统旋转式蠕动泵结构，软管磨损少，内壁脱落危险降低；拆装软管简单，利于消毒清洗细菌；料液与设备不接触，更加安全卫生。

Description

技术领域
本发明涉及一种蠕动泵， 特别是一种用来精密定量输送流体的蠕动泵。 背景技术
蠕动泵就像用手指夹一根充满流体的软管， 随着手指向前滑动管内流体向前 移动。 蠕动泵也是这个原理只是由滚轮取代了手指。 通过对泵的弹性输送软管 交替进行挤压和释放来泵送流体。 就像用两根手指夹挤软管一样， 随着手指的 移动， 管内形成负压， 液体随之流动。 蠕动泵就是在两个转辊子之间的一段泵 管形成 "枕"形流体。 在工业生产中， 很多情况下都需要通过蠕动泵向生产装 置中加入液体， 这样软管中还会残留液体， 或者通过软管加入液体的速度不够 快。 这样就需要设计一种挤压软管中液体的装置， 一方面可以通过反复的挤压 加快液体通入生产装置中的速度， 另一方面需要通过反复挤压可以将软管中残 留的液体； 同时需要精确控制输送液体的量。
中国发明专利 CN 203161500 U公开了一种直线型蠕动泵， 包括机架、 升降 装置、 输液装置、 输液软管、 直线驱动模组、 通断阀和挤压辊组件， 直线驱动 模组装在机架上， 输液装置与升降装置装连， 通断阀固定连接在机架上， 输液 软管装输液装置上， 并穿过通断阀， 挤压辊组件装连在直线驱动模组上。 本发 明提高输液软管的使用寿命， 占用空间小， 并且能提高液体输送的精准度。 但 是此发明不能实现对输送液体的精确控制， 另外， 此发明没有很好的防回流。 发明内容
本发明需要解决的技术问题是一种用来精密定量输送流体的直线型蠕动泵。 为解决上述的技术问题， 本发明的一种用于流体精密定量输送的直线型蠕动 泵包括底座， 所述底座上设置有固定软管用的侧座， 所述软管下方设置有直线 往复运动机构；
所述直线往复运动机构上设置有滑杆基座， 所述滑杆基座上端固定有滑杆基 座轴， 所述滑杆基座轴上套有滑块； 所述滑块上端设置有用于挤压软管、 使得 管内流体向前移动的滚柱， 所述滚柱与软管相接触， 所述底座上设置有滑杆基 座位置检测装置；
所述侧座上固定有与软管平行的导杆， 所述滑块上开有与导杆相适应的通 孔， 所述导杆穿过滑块上的通孔， 所述导杆两端与滑块上下移动装置相连接； 所述直线往复运动机构旁的底座上固定有防回流装置。
进一步的， 所述直线往复运动机构包括固定在底座上的旋转电机， 所述旋转 电机的转轴通过联轴器与丝杠传动连接， 所述丝杠设置在导杆下方与导杆相平 行； 所述丝杠上设置有可直线移动的丝母， 所述丝母与滑杆基座固定。
更进一步的， 所述丝母与滑杆基座之间设置有丝杠罩。
进一步的， 所述滑块上下移动装置包括固定在导杆两端的连接座， 所述左导 杆连接座与底座转动连接， 所述右导杆连接座与传动片转动连接； 所述传动片 与从动齿轮固定， 所述从动齿轮与主齿轮相啮合， 所述主动齿轮固定在第一电 机转轴上。
进一步的， 所述滑杆基座位置检测装置包括固定在丝杠两端下方底座上的光 电开关和固定在滑杆基座下方的光电隔片。
进一步的， 所述的防回流装置包括固定在滑套支架上的第二电机， 所述第二 电机转轴上固定有传动块， 所述传动块上固定有夹管固定块， 所述夹管固定块 上固定有穿过滑套支架的滑套轴， 所述滑套轴另一端固定有用于将管子进行夹 闭断流的夹管帽； 所述夹管固定块与底座之间设置有夹管帽位置检测装置。
进一步的， 所述夹管帽位置检测装置包括固定在夹管固定块下方的光电隔片 和固定在底座上与光电隔片相适应的光电开关。
更进一步的， 所述夹管固定块下方设置有限位轴， 所述限位轴固定在滑套支 架上。
进一步的， 所述软管上方的侧座上固定有盖板。
采用上述结构后， 创新直线式工作原理， 改变传统旋转式蠕动泵结构。另外， 软管磨损极少， 内壁脱落危险大大降低； 拆装软管极其简单， 利于消毒清洗细 菌； 料液与设备不接触， 更加安全卫生。 装量调节极其简单， 大批量重复分装， 稳定性高； 可设置缓启动防止飞溅或泡沬现象， 也可实现即停及回吸防滴落。 附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图 1为本发明的总装图。
图 2a和图 2b 为本发明直线往复运动机构和滑块上下移动装置的结构示意 图。
图 3为本发明丝杠罩的结构示意图。
图 4a和图 4b为本发明滑块的结构示意图。
图 5a-图 5c为本发明防回流装置的结构示意图。
图 6a-图 6e为本发明的工作过程示意图。
图中： 1为底座， 2为旋转电机， 3为丝杠， 4为滑杆基座， 5为导杆， 6为 软管， 7为软管接头， 8为丝杠罩， 9为滑块， 10为滑杆基座盖， 11为传动片， 12为从动齿轮， 13为主齿轮， 14为第一电机， 15为左导杆连接座， 16为右导 杆连接座， 17为滑杆基座轴， 18为连接支架， 19为第二电机， 20为滑套支架， 21为限位轴， 22为夹管固定块， 23为滑套轴， 24为夹管帽， 25为传动块， 26 为传动轴， 27为轴承， 28为左侧座， 29为右侧座， 30为盖板， 31为联轴器， 32为光电开关， 33为光电隔片
301为丝母， 901为转轴， 902为通孔， 903为滚柱
具体实施方式
如图 1所示， 本发明的一种用于流体精密定量输送的直线型蠕动泵， 包括底 座 1， 所述底座 1上设置有固定软管 6用的侧座， 这里包括左侧座 28和右侧座 29， 所述软管 6固定在左侧座 28和右侧座 29之间。 所述软管 6的两端连接有 用来连接输液管的软管接头 7。所述软管上方的左侧座 28和右侧座 29之间固定 有盖板 30， 盖板 30—方面很好的保护软管 6不受损坏。
所述软管 6下方设置有直线往复运动机构。 如图 1、 图 2a和图 2b所示， 本 发明采用的直线往复运动机构包括固定在底座 1上的旋转电机 2，所述旋转电机 2的转轴通过联轴器 31与丝杠 3相连接， 所述丝杠设置在导杆 5下方与导杆 5 相平行， 导杆 5与软管 6相平行。 所述丝杠 3上设置有可直线移动的丝母 301， 所述丝母 301与滑杆基座 4固定， 通过丝杠 3的转动可以带动丝母 301和滑杆 基座 4的整体沿导杆 5向前移动。通过旋转电机 2带动丝杠 3转动， 滑杆基座 4 与丝杠相适应， 所以滑杆基座 4就可以沿丝杠直线往复运动。 这样可以通过旋 转电机 2带动滑杆基座 4在软管下方沿与软管平行的直线方向移动， 自然也就 可以通过旋转电机 2控制丝杆的转动量， 从而控制滑杆基座和滑块整体的移动 量， 也就精确定量的控制了液体输送的量。 更进一步的， 所述丝杠 3与滑杆基座 4之间固定有丝杠罩 8， 丝杠罩 8的结 构如图 3所示。 丝杠 3和丝母 301在丝杠罩 8内侧， 滑杆基座 4从丝杠罩 8两 侧伸入丝杠罩 8内与丝母 301固定。 这样一方面可以有效的防止灰尘落入到丝 杠 3中， 使得丝杠长期运作良好， 另一方面可以对滑杆基座 4的直线往复运动 起到导向的作用。
为了能够挤压软管中的液体， 所述滑杆基座 4上端固定有滑杆基座盖 10， 所述滑杆基座盖 10上固定有滑杆基座轴 17， 所述滑杆基座轴 17上套有滑块 9， 滑块 9可沿滑杆基座轴 17上下移动。 如图 4a和图 4b所示， 所述滑块 9上端设 置有可转动的滚柱 903， 所述滚柱 903固定在穿过滑块 9上端的转轴 901上， 这 样滑块 9可绕转轴 901转动。 所述滚柱 903与软管 6相接触， 这样就可以通过 上下移动滑块 9的位置实现滑块 9压紧软管 6和松开软管 6的状态。
为了能够实现滑块 9的上下移动， 所述滑块 9上开有与导杆 5相适应的通 孔 902， 所述导杆有 2个， 2个导杆相平行。 所述导杆穿过滑块 9上的通孔 902， 所述导杆两端与滑块上下移动装置相连接。
如图 2a和图 2b所示， 所述滑块上下移动装置包括固定在导杆 5两端的连接 座， 所述左导杆连接座 15通过连接支架 18与底座转动连接， 所述右导杆连接 座 16与传动片 11转动连接。 所述传动片 11与从动齿轮 12固定， 所述从动齿 轮 12与主齿轮 13相啮合， 所述主动齿轮 13固定在第一电机 14的转轴上。 这 样因为导杆 5的两端都是转动连接， 所以当第一电机 14转动时， 主齿轮 13带 动从动齿轮 12发生转动， 从而使得导杆 5向下移动； 这样位于导杆 5上的滑块 9就会向下移动， 此时滑块 9沿着滑杆基座轴 17向下移动， 滑块 9与滑杆基座 盖 10之间的距离减小。 为了能够实现往复的直线运动， 所述底座上设置有滑杆基座位置检测装置， 所述滑杆基座位置检测装置包括固定在丝杠两端底座上的光电开关 32和固定在 滑杆基座 4下方的光电隔片 33， 当滑杆基座 4带着滑块 9移动到丝杆两端的位 置时， 光电开关 32就会被光电隔片 33隔断， 从而检测到滑杆基座 4的位置。 当左侧光电开关检测到滑杆基座 4时， 旋转电机 2带动丝杠 3， 使得滑杆基座 4 向右移动； 当右侧光电开关检测到滑杆基座 4时， 旋转电机 2带动丝杠， 使得 滑杆基座 4向左移动。
进一步的， 为了防止滑杆基座 4向左移动时发生回流的现象， 所述直线往复 运动机构的右侧固定有防回流装置。 如图 5a-图 5c所示， 所述的防回流装置包 括固定在滑套支架 20上的第二电机 19， 所述第二电机 19转轴上固定有传动块 25， 所述传动块 25上固定有夹管固定块 22， 所述夹管固定块 22上固定有穿过 滑套支架 20的滑套轴 23， 所述滑套轴 23另一端固定有夹管帽 24。 所述传动块 25通过传动轴 26与第二电机 19转轴相固定， 所述传动轴 26与传动块 25之间 设置有轴承 27。 这样可以通过第二电机 19带动传动块 25转动， 从而带动夹管 固定块 22、 滑套轴 23和夹管帽 24的整体上下移动。 当当右侧光电开关检测到 滑杆基座 4时， 启动第二电机 19， 使得夹管帽 24向上移动压紧软管 6， 这样软 管 6中液体就不会回流。
为了确定夹管帽 24上下移动时的位置， 所述夹管固定块 22与底座 1之间设 置有夹管帽位置检测装置。 如图 5a和图 6a所述夹管帽位置检测装置包括固定 在夹管固定块 22下方的光电隔片 33和固定在底座上与光电隔片相适应的光电 开关 32。 当夹管固定块 22、 滑套轴 23和夹管帽 24的整体上下移动时， 光电隔 片 33和光电开关 32就会出现交错和分离的状态， 从而实现检测夹管帽 24上下 移动的位置。
更进一步的， 为了防止夹管固定块 22 向下移动的过多， 所述夹管固定块下 方设置有限位轴 21， 所述限位轴固定在滑套支架 20上。
本发明的工作过程如下： 图 6a为本发明的起始状态， 滑杆基座 4和滑块 9 的整体处于底座 1的左侧， 连接导杆 5的传动片 11处于倾斜状态， 滑杆基座盖 10与滑块 9之间的距离较短， 滑块 9没有压紧软管 6。
图 6b为旋转电机 2带动滑杆基座 4和滑块 9整体向右挤压软管的示意图。 滑块上下移动装置的第一电机 14启动， 通过从动齿轮 12和主动齿轮 13的配合 转动传动片 11， 使得传动片 11处于竖直的位置， 从而使得滑块 9向上移动， 滑 杆基座盖 10与滑块 9之间的距离变长， 通过图 6a和图 6b中滑杆基座轴 17的 露出长度不同可见。 通过旋转电机 2带动丝杠 3转动， 从而使得滑杆基座 4和 滑块 9的整体向右移动， 滑块 9压紧软管 6， 滑块 9从而从左向右挤压软管 6中 的液体。
图 6c为滑杆基座 4移动到丝杠 3的最右侧， 此时， 丝杠右侧的光电开关 32 被滑杆基座 4下方的光电隔片 33隔断，检测到滑杆基座 4移动到丝杠 3最右侧。 控制旋转电机 2停止工作。
然后， 为了防止挤压后的液体回流， 如图 6d所示， 启动第二电机 19， 带动 夹管固定块 22、 滑套轴 23和夹管帽 24的整体向上移动 （通过图 6c和图 6d中 夹管帽 24与滑套支架 20之间滑套轴 23的露出长度可见）， 从而使得夹管帽 24 压紧软管 6， 防止液体回流。
最后， 如图 6e所示， 启动第一电机 14， 主齿轮 13带动从动齿轮 12发生转 动， 从而使得导杆 5向下移动， 导杆 5上的滑块 9会同时向下移动， 此时滑块 9 沿着滑杆基座轴 17向下移动。 这样滑块 9就会与软管 6脱开， 不接触， 然后启 动旋转电机 2反向带动丝杠， 从而带动滑杆基座 4和滑块 9的整体向左移动。 当移动到最左侧时， 底座左侧的光电开关 32被滑杆基座 4下方的光电隔片 33 隔断， 检测到滑杆基座 4移动到丝杠 3最左侧。 此时启动第二电机 19， 带动夹 管固定块 22、 滑套轴 23和夹管帽 24的整体向下移动， 使得装置整体回到图 6a 的状态。
以上就进行了一个往复加压软管中液体的动作，依次按照图 6a-图 6e就可不 断的进行往复挤压软管中液体的动作。
当然， 本发明的直线往复运动机构也可以采用螺纹副或齿条和齿轮的组合， 滑杆基座位置检测装置也可以采用挡片和行程开关， 这样的变换均落在本发明 的保护范围之内。
需要声明的是， 上述发明内容及具体实施方式意在证明本发明所提供技术方 案的实际应用， 不应解释为对本发明保护范围的限定。 本领域技术人员在本发 明的精神和原理内， 当可作各种修改、 等同替换、 或改进。 本发明的保护范围 以所附权利要求书为准。

Claims

WO 2015/067070 ^ ^ ^ ^ PCT/CN2014/082729
1、 一种用于流体精密定量输送的直线型蠕动泵， 包括底座， 其特征在于： 所述 底座上设置有固定软管用的侧座， 所述软管下方设置有直线往复运动机构； 所述直线往复运动机构上设置有滑杆基座， 所述滑杆基座上端固定有滑杆 基座轴， 所述滑杆基座轴上套有滑块； 所述滑块上端设置有用于挤压软管、 使 得管内流体向前移动的滚柱， 所述滚柱与软管相接触， 所述底座上设置有滑杆 基座位置检测装置；
所述侧座上固定有与所述软管平行的导杆， 所述滑块上开有与所述导杆相 适应的通孔， 所述导杆穿过滑块上的通孔， 所述导杆两端与滑块上下移动装置 相连接；
所述直线往复运动机构旁的底座上固定有防回流装置。
2、 按照权利要求 1所述的一种用于流体精密定量输送的直线型蠕动泵， 其特征 在于： 所述直线往复运动机构包括固定在底座上的旋转电机， 所述旋转电机的 转轴通过联轴器与丝杠传动连接， 所述丝杠设置在所述导杆下方与所述导杆相 平行； 所述丝杠上设置有可直线移动的丝母， 所述丝母与所述滑杆基座固定。
3、 按照权利要求 2所述的一种用于流体精密定量输送的直线型蠕动泵， 其特征 在于： 所述丝母与所述滑杆基座之间设置有丝杠罩。
4、按照权利要求 1或 2或 3所述的一种用于流体精密定量输送的直线型蠕动泵， 其特征在于： 所述滑块上下移动装置包括第一电机、 固定在所述导杆左端的左 导杆连接座以及固定在所述导杆右端的右导杆连接座， 所述左导杆连接座与底 座转动连接， 所述右导杆连接座与传动片转动连接； 所述传动片与从动齿轮固 定， 所述从动齿轮与主动齿轮相啮合， 所述主动齿轮固定在所述第一电机的转 轴上。
5、按照权利要求 2或 3或 4所述的一种用于流体精密定量输送的直线型蠕动泵， 其特征在于： 所述滑杆基座位置检测装置包括固定在所述丝杠两端下方底座上 的光电开关和固定在所述滑杆基座下方的光电隔片。
6、 按照权利要求 1至 5中任一所述的一种用于流体精密定量输送的直线型蠕动 泵， 其特征在于： 所述的防回流装置包括滑套支架以及固定在所述滑套支架上 的第二电机， 所述第二电机转轴上固定有传动块， 所述传动块上固定有夹管固 定块， 所述夹管固定块上固定有穿过滑套支架的滑套轴， 所述滑套轴另一端固 定有用于将管子进行夹闭断流的夹管帽； 所述夹管固定块与底座之间设置有夹 管帽位置检测装置。
7、 按照权利要求 6所述的一种用于流体精密定量输送的直线型蠕动泵， 其特征 在于： 所述夹管帽位置检测装置包括固定在所述夹管固定块下方的光电隔片和 固定在底座上与光电隔片相适应的光电开关。
8、 按照权利要求 6或 7所述的一种用于流体精密定量输送的直线型蠕动泵， 其 特征在于： 所述夹管固定块下方设置有限位轴， 所述限位轴固定在所述滑套支 架上。
9、 按照权利要求 1至 8中任一项所述的一种用于流体精密定量输送的直线型蠕 动泵， 其特征在于： 所述软管上方的侧座上固定有盖板。
PCT/CN2014/082729 2013-11-07 2014-07-22 一种用于流体精密定量输送的直线型蠕动泵 WO2015067070A1 (zh)

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