CN207847873U

CN207847873U - A kind of medical solution quantifies pressue device

Info

Publication number: CN207847873U
Application number: CN201820211734.8U
Authority: CN
Inventors: 李俊
Original assignee: Wuhan Soft Project Professional School
Current assignee: Wuhan Soft Project Professional School
Priority date: 2018-02-07
Filing date: 2018-02-07
Publication date: 2018-09-11
Anticipated expiration: 2028-02-07

Abstract

A kind of medical solution quantifies pressue device, including internal layer shell and outer casing, and radially installed has multiple plunger cases, and the piston rod radial penetration internal layer shell of plunger case wherein between internal layer shell and outer casing；The internal layer shell inner rotation is equipped with eccentric wheel, and one end of internal layer shell is equipped with the power unit of driving eccentric wheel rotation；The piston rod end of the plunger case is hinged with A-frame, which is slidably connected with eccentric wheel；The solution pressue device further reduces vibrations and noise in plunger case operational process, extend the service life of pressue device, eccentric wheel is provided using motor rotate forward power simultaneously, eccentric wheel reverse rotatory force is provided by accumulation of energy clockwork spring, accurately controls the solution amount of pressurization of each forward and backward of eccentric wheel.

Description

A kind of medical solution quantifies pressue device

Technical field

The utility model belongs to the field of medical instrument technology, relates in particular to a kind of solution pressue device, and especially one Kind medical solution quantifies pressue device.

Background technology

Current medical industry mostly uses the pressure source that diaphragm pump, eccentric wheel plunger case etc. pressurize as solution, but diaphragm It pumps because of its excessive operation vibrations and operation noise, cannot be satisfied the demand of the application scenarios such as high-precision solution pressurization, tradition is partially Heart wheel plunger case has the characteristics that pressure output is high, volumetric efficiency is high, range of flow is big and compact-sized, and operation shakes and makes an uproar Sound is less than diaphragm pump, and the medical solution pressurization for substantially meeting medium accuracy requirement requires, but due to the knot of eccentric wheel plunger case Structure feature causes it that eccentric wheel is driven to there is inevitably hard impact or soft impact (i.e. eccentric wheel radial with plunger the cylinder piston Rotation generates shock with plunger case pistons end, and then applies radial load to plunger the cylinder piston, makes piston radial/axial direction shake It is dynamic), and cause the geometry of liquid inventory with pressure to be pulsed because of impact, and then solution pressurization precision is caused not carry further Height, and because of the problems such as in the presence of impacting, easily the damage of generation plunger case, service life are not grown, and stability is poor.

In addition, quantitatively pressurize in operation currently for a large amount of medical solution, the high-precision of generally use foreign countries import every The high-cost equipment of the high-precision such as membrane pump, flow control valve, and quantitatively pressurize operation for a small amount of medical solution, mostly use people After work quantitative configuration, pressurized equipment is recycled to carry out pressurization operation as needed.

By the retrieval of patent document, following related patent document is found：

Cylindrical cam plunger case (CN201320877608.3) utility model discloses a kind of cylindrical cam plunger case, packet The pump housing, cylindrical cam axis, driving device are included, cylindrical cam axis is set in the pump housing, and driving device is for driving cylindrical cam axis Rotation, cylindrical cam axis the cam path of arrangement of curves is equipped with along the whole body, be provided in an axial direction outside the pump housing several to symmetrical cloth The piston cylinder and several T-type piston rods set, and connected by the horizon bar both ends of T-type piston rod in each pair of symmetrical piston cylinder cylinder It connects, vertical bar one end of T-type piston rod is movably connected on by being fixed with bearing wheel in cam path.The utility model is in low cost In the case of just can achieve the effect that the more strokes of multi-cylinder, to reach huge discharge output, the high requirement of pump efficiency.

A kind of grooved cam of servo motor driving declines flow plunger case (CN201610954125.7) disclosure of the invention A kind of grooved cam of servo motor driving declines flow plunger case, including the pump housing, fixed servo motor and harmonic wave on upper end cover Reducer assemblies connect, and the output firm gear of harmonic reduction device assembly is connected by the upper end of sleeve and axis, and geosynclinal convex is provided in the middle part of axis Wheel；The pump housing is uniformly distributed along the circumference plunger hole, and plunger lower part and plunger hole are slidingly sealed cooperation by sealing ring formation, plunger upper part and Linear bearing formation is slidably matched, and linear bearing is mounted on by inner panel on the pump housing, and plastic bearing, modeling are housed on the shoulder of connecting rod Expect that bearing is mounted in grooved cam, is formed with grooved cam and roll cooperation；Axis lower part connects oil distribution casing, and oil distribution casing and plunger hole are matched It closes, when shaft rotation is moved, oil distribution casing is respectively through suction (row) fluid apertures, suction (row) liquid annular channel and the liquid sucting port and leakage fluid dram on the pump housing Connection realizes that the utility model grooved cam is structure-integrated with oil, with discharge opeing process is stable, output flow is adjustable and stablizes The advantages of.

By the comparison of technical characteristic, applicant thinks technical solution and the present patent application side of patent document disclosed above The structure of case is all different with purpose.

Utility model content

The purpose of the utility model is to overcome in place of the deficiencies in the prior art, provide a kind of medical solution quantitatively to pressurize dress It sets, the solution pressue device, the vibrations in plunger case operational process and noise are further reduced, pressue device is extended Service life, while providing eccentric wheel using motor and rotating forward power, eccentric wheel reverse rotatory force is provided by accumulation of energy clockwork spring, can accurately be controlled The solution amount of pressurization of each forward and backward of eccentric wheel processed.

The purpose of this utility model is achieved through the following technical solutions：

A kind of medical solution quantifies pressue device, it is characterised in that：Including outer casing and internal layer shell, wherein outer shell Body is circumferentially packed in outside internal layer shell, and radially installed has multiple plunger cases between outer casing and middle internal layer shell；It is described Internal layer shell inner rotation is equipped with eccentric wheel, and the output end of the eccentric wheel and plunger case is rotatably assorted connection；The inner layer case One end of body is equipped with power cavity, and power unit is installed in power cavity, which includes motor, motor gear, unidirectional Gear, eccentric wheel gear, spring gear and accumulation of energy clockwork spring, wherein motor are fixedly mounted on power cavity, on the output shaft of motor It coaxially is fixedly mounted with motor gear, and is rotatably installed with drive link on the output shaft of motor；It is rotatably installed on the drive link unidirectional Gear, and ratchet engages connection with motor gear；It is coaxially fixedly mounted with spring gear on the output shaft of the accumulation of energy clockwork spring；It is described One end of eccentric wheel is installed with eccentric wheel gear, which engages connection with ratchet and spring gear.

In the above scheme, preferred technical solution is：The piston rod end of plunger case is hinged with A-frame, the triangle Multiple pulleys are installed, and multiple pulleys are rotatablely connected with the periphery of eccentric wheel on holder.

In the above scheme, preferred technical solution is：Torque spring is installed in power cavity, the torque spring one end with The inner wall of power cavity is slidably connected, and other end cushioning supportive is on drive link.

In the above scheme, preferred technical solution is：Arc-shaped limit hole is formed on eccentric wheel gear；The power cavity Index dial is installed on outer wall, and multiple positioning bolts are installed on index dial, which stretches into power cavity and axial Penetrate arc-shaped limit hole.

In the above scheme, preferred technical solution is：Inlet opening and fluid hole, and outer casing are formed on outer casing Inside is equipped with liquid trap and dispenser, and wherein dispenser is connected to inlet opening, and liquid trap is connected to fluid hole, and liquid trap and liquid separation Device is connected to the rodless cavity of plunger case.

In the above scheme, preferred technical solution is：In the fluid path that liquid trap is connected to multiple plunger case rodless cavities It is provided with the first check valve, the second check valve is both provided in the fluid path that dispenser is connected to multiple plunger case rodless cavities.

The advantages of the utility model and economic effect are：

The utility model effectively constrains eccentric wheel rotation to change and plunger by cutting with scissors dress A-frame in plunger case end The radial load of the cylinder piston reduces the vibrations in plunger case operational process and noise, extends service life；Being provided with simultaneously can The power unit of rotational angle is controlled, which provides eccentric wheel by motor and rotate forward power, is provided by accumulation of energy clockwork spring eccentric Reverse Power is taken turns, the solution amount of pressurization of each forward and backward of eccentric wheel is accurately controlled；In addition torsion bullet is installed in power cavity Spring, drive link impact dynamic cavity wall when preventing motor reversal, to generate vibrations and noise；Finally set on eccentric wheel gear Arc-shaped limit hole is set, and the positioning bolt by being installed through on index dial penetrates arc-shaped limit hole, the rotation to eccentric wheel Turn amount to be accurately controlled.

The utility model divides by the way that inlet opening and fluid hole are arranged on outer casing, while in the setting of outer layer enclosure interior The dispenser and liquid trap not being connected to inlet opening and fluid hole realize the miniaturization of device, and unidirectional by first, second The fluid path of multiple plunger cases is separated from each other by valve, can prevent the quantitative pressue device internal pressure that multiple plunger cases are parallel with one another Disorderly and loss.

Description of the drawings

Fig. 1 is the front view (sectional view) of the utility model；

Fig. 2 is Section A-A sectional view in Fig. 1；

Fig. 3 is section B-B sectional view in Fig. 1；

Fig. 4 is the side view of the utility model；

Fig. 5 is the utility model fluid path connection diagram.

In figure：1- outer casings；2- plunger cases；3- internal layer shells；4- eccentric wheels；5- pulleys；6- A-frames；7- feed liquors Hole；8- dispensers；9- liquid traps；10- fluid holes；11- spring gears；12- accumulation of energy clockwork springs；13- bias wheel gears；14- power Chamber；15- positioning bolts；16- ratchets；17- drive links；18- motor gears；19- motors；20- arc-shaped limits hole；21- is turned round Power spring；22- index dials.

Specific implementation mode

For that can further appreciate that the contents, features and effects of the utility model, the following examples are hereby given, and coordinates attached drawing Detailed description are as follows.It should be noted that the present embodiment is descriptive, it is not restrictive, cannot thus limits this practicality Novel protection domain.

A kind of medical solution quantifies pressue device, it is characterised in that：Including outer casing 1 and internal layer shell 3, wherein outer layer Shell is circumferentially packed in outside internal layer shell, and radially installed has multiple plunger cases 2 between outer casing and middle internal layer shell；Institute It states internal layer shell inner rotation and eccentric wheel 4 is installed, the output end of the eccentric wheel and plunger case is rotatably assorted connection；The internal layer One end of shell is equipped with power cavity 14, and power unit is installed in power cavity, which includes motor 19, motor gear 18, ratchet 16, eccentric wheel gear 13, spring gear 11 and accumulation of energy clockwork spring 12, wherein motor are fixedly mounted on power cavity, It is coaxially fixedly mounted with motor gear on the output shaft of motor, and is rotatably installed with drive link 17 on the output shaft of motor；The drive link On be rotatably installed with ratchet, and ratchet engages connection with motor gear；It is coaxial on the output shaft of the accumulation of energy clockwork spring It is fixedly mounted with spring gear；One end of the eccentric wheel is installed with eccentric wheel gear, the bias wheel gear and ratchet and hair The engagement connection of bar gear.

In the above scheme, preferred technical solution is：The piston rod end of plunger case is hinged with A-frame 6, this three Multiple pulleys 5 are installed, and multiple pulleys are rotatablely connected with the periphery of eccentric wheel in angle support.

In the above scheme, preferred technical solution is：Torque spring 21 is installed, the torque spring one end in power cavity It is slidably connected with the inner wall of power cavity, other end cushioning supportive is on drive link.

In the above scheme, preferred technical solution is：Arc-shaped limit hole 20 is formed on eccentric wheel gear；The power cavity Outer wall on index dial 22 is installed, and multiple positioning bolts 15 are installed on index dial, which stretches into power cavity And axial penetration arc-shaped limit hole.

In the above scheme, preferred technical solution is：Inlet opening 7 and fluid hole 10, and outer layer are formed on outer casing Enclosure interior is equipped with liquid trap 9 and dispenser 8, and wherein dispenser is connected to inlet opening, and liquid trap is connected to fluid hole, and liquid trap It is connected to the rodless cavity of plunger case with dispenser.

In addition, the utility model is preferred, fluid path is by dispenser to plunger case rodless cavity where the first check valve controls it Direction is connected to, reversed to end；Fluid path is connected to by plunger case rodless cavity to liquid trap direction where second check valve controls it, reversely Cut-off.

In addition, the utility model is preferred, internal layer shell and outer casing are closed circular tubular construction, internal layer shell with One group of plunger case is set at interval of 90 ° of angles between outer casing, every group of plunger case is set as two, and the utility model is total to be needed 8 plunger cases, it should be noted that every group of plunger case shares an A-frame, the utility model 4 triangle branch of total installation Frame.

The utility model drives plunger case to live due to being bonded rotation mode with the peripheral surface of eccentric wheel using A-frame Row piston motion is filled in, and in order to improve stability, preferably by plunger case pistons end A-frame hinged connection, this practicality It is novel preferred using four groups of total eight plunger cases, increase plunger case quantity while shortening each plunger case stroke, uses To ensure the output pressure of pressue device and the stability of output pressure.

The utility model is preferred, base support is arranged at internal layer shell both ends, and solid wherein on the base support of one end Dingan County fills power cavity.

In addition the utility model is preferred, accumulation of energy clockwork spring always be in impaction state, inside in the inclined of the utility model There are clockwork spring pretightning forces when heart wheel gear is located at initial position.

In order to more clearly describe the specifically used mode of the utility model, a kind of example is provided below：

When the utility model is used, it is only necessary to inlet opening be connected into external inlet tube, fluid hole connects external outlet tube, then It is passed through the solution of appropriate pressure in inlet tube, and opens driving motor, middle shaft rotation is driven by driving motor, while driving inclined Heart wheel rotates, and is rotated simultaneously in camshaft, and pulley is fitted closely with eccentric wheel always, and then prevents plunger pump piston radial The soft shock and hard hit that shock eccentric wheel in turn results in are hit, and the noise in operational process and vibrations are reduced.

The utility model power unit work when, 1, motor provide eccentric wheel rotate in the forward direction power：Motor drives motor Gear rotates clockwise (direction on the basis of right view) to drive ratchet to rotate counterclockwise, and it is single so that drive link is driven Connection is engaged with eccentric wheel gear to gear, and then eccentric wheel gear is made to rotate clockwise, until the arc limit in eccentric gear Position hole edges at two ends is contacted with positioning bolt, completes to rotate forward pressurization stroke；2, accumulation of energy clockwork spring provides eccentric wheel reverse to rotary power： Motor drives motor gear to rotate counterclockwise, and ratchet locks clockwise, therefore drive link provides power drive by motor gear Ratchet is detached from eccentric wheel gear, at this time motor continued power, and drive link is by torque spring cushioning supportive, accumulation of energy clockwork spring at this time Band moving valve gear rotates clockwise, and is rotated counterclockwise by spring gear band movable plate news wheel gear, until in eccentric gear Arc-shaped limit hole edges at two ends is contacted with positioning bolt, completes reversion pressurization stroke；

The utility model is before work, installation position that need to be according to the amount of solution selective positioning bolt of pressurization on index dial It sets, the rotation amount of eccentric wheel gear is limited.

In addition the utility model shortens the stroke of single plunger case, and ensures to export in a manner of increasing plunger pump quantity Pressure, which can improve the rotary speed of camshaft to the maximum extent, while can also ensure in eccentric wheel high-speed When rotation, the pressure pulse with press liquid of pressue device output is minimum, it is therefore prevented that causes because single plunger case stroke is long Pressure increase sharply or situations such as dramatic decrease occurs, improve delivery efficiency under the premise of ensureing output pressure, meet medical molten The continuous pressure requirement of the high-precision, high stability of liquid pressue device, and due to reducing vibrations and noise to the maximum extent, therefore The mechanical loss inside device is reduced, the service life of single unit system is improved.

It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.

Claims

1. a kind of medical solution quantifies pressue device, it is characterised in that：Including outer casing and internal layer shell, wherein outer casing It is circumferentially packed in outside internal layer shell, and radially installed has multiple plunger cases between outer casing and middle internal layer shell；In described Layer enclosure interior is rotatablely equipped with eccentric wheel, and the output end of the eccentric wheel and plunger case is rotatably assorted connection；The internal layer shell One end power cavity is installed, and power unit is installed in power cavity, which includes motor, motor gear, unidirectional tooth Wheel, eccentric wheel gear, spring gear and accumulation of energy clockwork spring, wherein motor are fixedly mounted on power cavity, same on the output shaft of motor Axis is fixedly mounted with motor gear, and drive link is rotatably installed on the output shaft of motor；Unidirectional tooth is rotatably installed on the drive link Wheel, and ratchet engages connection with motor gear；It is coaxially fixedly mounted with spring gear on the output shaft of the accumulation of energy clockwork spring；It is described inclined One end of heart wheel is installed with eccentric wheel gear, which engages connection with ratchet and spring gear.

2. a kind of medical solution according to claim 1 quantifies pressue device, it is characterised in that：The piston of the plunger case Boom end is hinged with A-frame, is equipped with multiple pulleys on the A-frame, and multiple pulleys with the outer planet of eccentric wheel Dynamic connection.

3. a kind of medical solution according to claim 1 quantifies pressue device, it is characterised in that：Installation in the power cavity There is torque spring, the inner wall of the torque spring one end and power cavity is slidably connected, and other end cushioning supportive is on drive link.

4. a kind of medical solution according to claim 1 quantifies pressue device, it is characterised in that：On the bias wheel gear It is formed with arc-shaped limit hole；Index dial is installed on the outer wall of the power cavity, and multiple positioning bolts are installed on index dial, it should Positioning bolt stretches into power cavity and axial penetration arc-shaped limit hole.

5. a kind of medical solution according to claim 1 quantifies pressue device, it is characterised in that：It is made on the outer casing There are inlet opening and fluid hole, and liquid trap and dispenser are installed inside outer casing, wherein dispenser is connected to inlet opening, liquid collecting Device is connected to fluid hole, and liquid trap is connected to the rodless cavity of plunger case with dispenser.

6. a kind of medical solution according to claim 5 quantifies pressue device, it is characterised in that：The liquid trap with it is multiple It is both provided with the first check valve, the fluid path that dispenser is connected to multiple plunger case rodless cavities in the fluid path of plunger case rodless cavity connection On be both provided with the second check valve.