CN206604519U - A kind of new liquid relief pump - Google Patents

Abstract

The utility model discloses a kind of new liquid relief pump, including framework, pressure-button, spring, pointer, soft rubber and small button：Framework is the cylinder of inner hollow, is divided into pressure-button and lays space, pointer placement space, piston placement space and pipette connection space.Pressure-button includes press device and piston, and press device includes the nut and screw rod being installed together with spiral lamination, screw rod end connection piston.Screw jacket sets and is partly fixedly connected with pointer on spring, screw rod.Soft rubber is internally provided with a space for laying small button, and inside circumference is provided with circular protrusion, and pipette is inserted at circular protrusion.The part being installed together of nut and screw rod is located at outside framework, and the remainder of screw rod is located at pressure-button and laid in space；Piston is located at piston and laid in space；Pointer is located in pointer placement space and end is extend out to outside framework；Soft rubber plug is in pipette connection space, and the end of small button is extend out to outside framework by opening position.

Description

A kind of new liquid relief pump

Technical field

The utility model is related to a kind of liquid-transfering device, and in particular to a kind of new liquid relief pump.

Background technology

In the solution of measured amounts, it will usually use the instruments such as liquid-transfering gun, pipette or graduated cylinder, these instruments In it is most commonly seen be pipette and graduated cylinder.Pipette is the instrument for the weighing liquid being frequently used in laboratory, is used When be often used together with ear washing bulb, but when coordinate ear washing bulb operation pipette when, often because misoperation is caused The error measured.If the instrument of convenient use can be designed, energy enhanced convenience user experiences in an experiment, and favorably The larger error caused when reduction student is weighing solution, improves interest of the student to experiment.And liquid-transfering gun be one kind can The instrument of solution needed for quickly measuring oneself is reached, but they are most for micropipette, and the liquid of middle amount measures institute The instrument that can be used is seldom.Therefore it is considerable to design the instrument that amount solution is drawn in a be adapted to.

The instrument that amount solution is drawn in being adapted on the market at present is mainly pipette suction assisting device, and pipette suction assisting device is to coordinate Pipette, helps pipette more to facilitate the instrument of draw solution, generally all has the place being connected with pipette； At present, pipette suction assisting device on the market mainly has following several：

(1) ear washing bulb：Ear washing bulb is most commonly seen instrument in laboratory, coordinate pipette in use, pipette After ear washing bulb draw solution, pin pipette using finger and carry out liquid level position regulation, then carry out other operations.Wash ear Ball is used not only for the use of pipette, can also do various dedusting work, therefore it is the instrument of multi-purpose type.Advantage is：Valency Lattice are cheap, it is more convenient to operate.Inferior position is：With pipette with the use of when, it will usually cause during absorption each Error is planted, such as：Dynamics is too small, causes repeatedly absorption, dynamics excessive, causes to need finger to pin after the completion of solution spilling, absorption Pipette carries out solution height regulation, and stability is poor, easily causes secondary absorption etc..

(2) liquid relief pump：Liquid relief pump is common pipette suction assisting device in laboratory, and one-hand operation coordinates glass scales Suction pipe, scale buret liquid relief, alternative ear washing bulb, blue suction ball.In use, suction pipe upper end is inserted in liquid relief pump, it is past during imbibition Lower rotation pulley, automatic imbibition.During discharge opeing, pulley is up rotated, liquid outlet quantity can be precisely controlled.Pressed by the discharge opeing of fixed handle Button, can be with quick fluid-discharge.Advantage is：Cheap, operation is more convenient.Have the disadvantage：It is applicable with carrying " blowing " word in pipette The pipette of sample, when when being used cooperatively with the pipette without " blowing " printed words with it because of calibration pipette or pipette, has contemplated that Retain the volume of solution at sophisticated inwall, and cause error.

(3) Large Copacity Manual liquid transfering device：Large Copacity Manual liquid transfering device one-hand operation, be divided into during liquid relief：Install and move Liquid pipe, imbibition, adjustment meniscus, several operations of discharge opeing.Unique valve system facilitates the compression of balloon.Can be with by control stick Imbibition and discharge opeing in accurate control operation.More accurate regulation can be carried out to the position of concave meniscus.Hydrophobic filter membrane can be protected Instrument is protected, prevents the interior of liquid from invading.Advantage is：It can carry out accurately controlling, tonifying Qi can continuously suck at any time, without inserting repeatedly Pull out, it is simple to operate, it is understandable.Have the disadvantage：Need by controlling the scale of control stick and observation pipette to determine solution uptake, Internal structure is complex, and complex manufacturing technology, imbibition discharge opeing control-rod use frequent, easy assembly damage parts.

(4) manual pipette suction assisting device：Manual pipette suction assisting device is similar with Large Copacity Manual liquid transfering device, but price is high It is expensive, do not introduce herein.

(5) Large Copacity electric pipettor：Large Copacity electric pipettor large-screen lc screen shows that 8 speed are set and electricity Information.Speed regulator button is touched, the speed of imbibition and point liquid can be easily adjusted.Finger tip controls imbibition and point liquid speed degree, it is ensured that Accuracy during liquid relief.Range ability is wide, can reach 0.1-100mL.Advantage is：Electric operating is very easy to use, numeral Volume show just with observation, it is lightweight, substantially reduce operation and exert oneself, be generally equipped with instrument stan, reduce operation by human hand.Shortcoming It is：Price is sufficiently expensive.Complicated, manufacture craft is difficult.

So, it is badly in need of one kind and can adapt to various pipettes, draw solution is convenient, accurate, can adjust solution position Liquid relief pump.

The content of the invention

Technical problem to be solved in the utility model is to be directed to the deficiencies in the prior art, and provides a kind of new Liquid relief pump, the liquid relief pump can facilitate, accurate draw solution, and adjustable solution position, it is adaptable to various pipettes.

To achieve these goals, the utility model is adopted the following technical scheme that：

A kind of new liquid relief pump, including framework, pressure-button, spring, pointer, soft rubber and small button, it is characterised in that：

Described framework, generally solid cylindrical structural, but inside is divided into four hollow spaces：Pressure-button is pacified Between emptying, pointer lays space, piston and lays space and pipette connection space；Wherein：Described pressure-button lays space Positioned at the topmost portion of lower portion, cylinder is shaped as, is moved towards identical with framework；Described pointer is laid and is spatially located at pressure Button lays the side in space, and being shaped as elliptical cylinder-shape, (cylindrical top surface and bottom surface are circle, the top surface of elliptical cylinder-shape and bottom Face is ellipse), move towards vertical with framework and be connected with pressure-button placement space；Described piston is laid and is spatially located at pressure Power button lays the underface in space, is shaped as rectangular parallelepiped structure, and upper surface is laid space with pressure-button and is connected；Described Pipette connection space is located at the underface that piston lays space, is shaped as cylinder, and upper surface is laid space with piston and is connected Logical, the side wall upper part of pipette connection space offers a gap；

Described pressure-button, including press device and piston, described press device include nut and screw rod, nut and Screw rod is installed together in the way of spiral lamination, and the end of screw rod is fixedly connected with described piston；In the inside of described piston Check (non-return) valve I is provided with centre；The bar wall periphery of described screw rod is arranged described spring；The upper part of the bar wall of described screw rod It is fixedly connected with described pointer；

Described soft rubber, is shaped as cylinder, and inner hollow, hollow top is divided into rectangular shape, bottom and is divided into Trapezoidal shape (top surface, bottom surface are rectangle or square, four side walls are trapezoidal)；The top of the hollow space of rectangular shape Portion is provided with check (non-return) valve II, middle part and is vertically installed with one small button placement space, the surrounding of the hollow space of trapezoidal shape Circular protrusion is provided with, pipette is inserted at circular protrusion；

Described small button includes shell, pressing lever, little spring, Rubber end or rubber sleave：Described shell is cylinder Shape, inner hollow, upper and lower end face respectively offers a circular hole；Described pressing lever, the middle part of the body of rod through hole from And the topmost for being located at the bar wall in shell in the middle part of the inside of shell, the body of rod encloses projection I to fix the body of rod provided with one In shell, the top of the body of rod is for press head and positioned at the outside of the upper surface of shell, and the bottom of the body of rod is located at the lower end of shell The outside and end in face are provided with a circle projection II；Described projection II outer cover is provided with Rubber end or rubber sleave；Described Little spring is sheathed on the middle part of the body of rod and positioned at the inside of shell, and the radius of little spring is more than the radius of shell lower surface hole； Described small button is located at small button and lays interior volume, and the press head of pressing lever stretches out small button placement space；

Described nut and the part being installed together of screw rod are located at the outside of framework, and the remainder of screw rod is located at frame Pressure-button inside frame is laid in space；Described piston is located at the piston of lower portion and laid in space；Described pointer Laid positioned at the pointer of lower portion in space and end extend out to the outside of framework；Described soft rubber plug connects in pipette Connect in space, the end of small button is extend out to the outside of framework by opening position；

The outside of described framework is provided with graduation mark, and graduation mark is laid space along pointer and set, the end of pointer Bending and sensing graduation mark.

In above-mentioned technical proposal, described framework, overall material is PP plastics (polypropylene), and overall specification is：Half Footpath 2cm, high 8.4cm；Wherein, the specification in pressure-button placement space is：Radius 1.5cm, high 2.5cm, piston lay space Specification is：(i.e. top and bottom are square, surrounding is rectangle, it is considered to which piston occupies part body by long 2cm, width 2cm, high 2.3cm Product), the specification of pipette connection space is：Radius 1.8cm, high 3cm.Framework, height residue 0.6cm, be above and below plastics thickness Degree, every 0.3cm；And pointer lays space, no particular/special requirement is the motion of pointer to be adapted to.Framework plays support and made With being the main structure for supporting whole instrument.

In above-mentioned technical proposal, described nut is shaped as cylinder, and upper and lower end face is open, and lower surface is outer Edge is provided with the brim of a hat I；Internal thread is distributed with the inner homogeneous of described nut；Described nut, the radius of cylindrical part For 1cm, height 3cm, the radius of the brim of a hat I parts is 1.5cm, and the overall material of nut is pp plastic cement (polypropylene).

In above-mentioned technical proposal, described screw rod, the topmost portion of bar portion is uniformly distributed with external screw thread, externally threaded bottom The outer in portion is provided with the brim of a hat II, and the lowermost part of bar portion sets described piston；The overall material of described screw rod is moulded for pp Glue (polypropylene).

In above-mentioned technical proposal, the described external screw thread of screw rod and the screw-internal thread fit of nut is used；Described nut, spiral shell Bar be installed together in the way of spiral lamination rear the brim of a hat I, the brim of a hat II be brought into close contact together and the brim of a hat I be located at the brim of a hat II it is upper Side.

In above-mentioned technical proposal, described pointer is located at described the brim of a hat II outside, and described spring is located at screw rod Bar wall periphery, the brim of a hat II lower section, the top of piston.

In above-mentioned technical proposal, described piston is y-type seal ring, is shaped as rectangular shape, and specification is long 2cm, width 2cm, high 0.2cm；Described check (non-return) valve I is rubber check (non-return) valve.

In above-mentioned technical proposal, described spring, material is low manganese spring steel material.

In above-mentioned technical proposal, described pointer, material is stainless steel.

In above-mentioned technical proposal, described soft rubber, material is PVDF (Kynoar)

In above-mentioned technical proposal, described check (non-return) valve I, check (non-return) valve II is dry type check (non-return) valve.

In above-mentioned technical proposal, described small button, entire length is 2.3cm, and the radius of shell is 0.3cm.

In the utility model scheme：

(1) framework：It is the main frame for supporting total, therefore is referred to as " framework ", framework plays supporting function, is to support The main structure of whole instrument.

(2) pressure-button：The instrument is importantly supported to reach the purpose of draw solution.Pressure-button removes piston, its It is pp plastic cement (polypropylene) material.Nut, screw rod are installed together in the way of spiral lamination, and they are internal for sky, no filling Thing, nut inner air is contacted with extraneous air；Pointer can moving up and down with button.Nut and screw rod are with spiral lamination herein Form connection purpose be in order to when error occurs in quantitative draw solution, effect, concrete operations can be adjusted：In design When not using adjusting herein, complete press pressure button draw solution be 4mL, rotary nut, due to that can not be rotated at piston, Screw rod and piston are moved down under frictional force effect, again because piston is moved downwardly during complete press pressure button, because This solution drawn is few than before.This operation can adjust uptake when pressing one time completely when making.Check (non-return) valve is located at In the middle of piston, when pressing down on pressure-button, check (non-return) valve is in open mode, and when pressure-button is upspring, check (non-return) valve is in Closed mode.The design utilizes the effect of the atmospheric pressure of air.The molecule mean kinetic energy of gas is far longer than intermolecular mutual The potential energy of effect, molecule approximately makees free random motion, therefore performance easily flowing, compressible and expansive broad perspectives Matter, is compressible fluid.After press pressure button, the gas below piston is compressed, and produces pressure so that stopping at button Inverse valve is opened under pressure, when button is lifted, and gas compression state disappears in the space below piston, non-return herein Valve is closed.

(3) spring：The main elastic force provided when button rises, to work as finger press pressure button by the elastic force of spring The purpose that elastic force upsprings pressure-button is provided afterwards.Spring be metal make, with plasticity, when pressing down on spring by Pressure is compressed, and generates the elastic force for needing to restore, in release button, and spring starts to expand in the presence of elastic force, So that button is moved upwards, piston upwards are driven, due to having the liquid in the presence of check (non-return) valve, pipette in atmospheric pressure Begun to move up under effect.Here require that the elastic force of spring should be appropriate, can not elastic force it is too big or too small, and width of the spring Properly, this avoid because rocking for spring, reduces the experience of user, or even cause error unnecessary.

(4) pointer：Effect is to provide reference position during draw solution.When pressing down on pressure-button pointer also with Move down, and scale is decorated with framework, using scale as the solution body with reference to required for can accurately measure oneself Product.There is the cavity of ellipse on the inwall of the outer wall of framework at pointer and the cylindrical space of upper part, so as to can with pointer Stretch out outside framework and can move up and down, pointer points to graduation mark, can so prevent user to prick in framework outside sweep Wound, can substantially point to graduation mark again.The graduation mark least unit of framework outer wall is 0.1cm, and overall length is 2.5cm, due to interior minister The space of cube determine to point to 0.1cm be will draw solution 0.2mL, by that analogy.By observing the graduation mark that pointer is pointed to Operation is facilitated, the graduation mark that user need not can be observed on pipette just can complete to draw work accordingly.Work as regulation During piston position, pointer can also be moved down accordingly, now when needing draw solution, it is necessary to volume plus starting to refer to The deviation of pin, is only correct required volume on graduation mark.

(5) soft rubber：The connection with pipette is supported, rubber position is primarily to the design that can be contacted with each other with pipette , sealing during necessary not only for pipette contact, and there is a need for being able to fix pipette, allow pipette using Double swerve is unable in journey.Annulus high spot adds the raised design of annulus using the spatial design of cone on the conical surface, Annulus is also integrated for soft rubber with surrounding rubber, and annulus is raised to play sealing function after pipette insertion, and Because soft rubber has restorable elastic reaction, fixation is played to pipette, this design is used for reference and foregoing descriptions Design in liquid relief pump.It is measured, the diameter of the contact site of pipette and suction assisting device between 1 centimetre to 2 centimetres, The a diameter of 1cm of pipette of wherein diameter 1mL ranges is in the majority, and the diameter 2cm of 20mL or so pipette is in the majority, remaining 1.5cm diameter is in the majority, therefore top-down a diameter of 0.6cm to the 2.3cm of cone space of design.Check (non-return) valve at this with Check (non-return) valve interaction at piston.When pressing down on pressure-button, frame center rectangular parallelepiped space air is extruded generation Air pressure, because the effect check (non-return) valve I of air pressure is opened, check (non-return) valve II is closed, and inner air passes through screw rod, spiral shell by check (non-return) valve I Cap is discharged into outside atmosphere, and now air pressure inside has reached balance with external pressure；When release button, bullet of the piston in spring Moved up under power effect, air pressure inside declines, cause check (non-return) valve I to close, check (non-return) valve II is opened, the liquid and gas of pipette Move up under atmospheric pressure, because the weight of the solution of absorption is small, therefore the error very little caused, and can also The error for adjusting to avoid the occurrence of.

(6) small button：Button plays the purpose that solution is taken out after pressing；During the instrument use, work as draw solution Finish and carry out trickle adjustment if desired afterwards, or adjustment finish after also may require that and discharge drawn in pipette molten Liquid, it is necessary to which this device is operated.Little spring provides the screen resilience after small button press；Rubber end or rubber sleeve are required and outer Shell is in sealing contact, so allowing Rubber end or rubber sleeve somewhat as inside is charged into a bit in manufacturing process, it is ensured that Rubber end or rubber Gum cover when small button is not pressed will not gas leakage, if gas leakage, should just change button herein.Button size outside shell Because suitable, it is impossible to the situation of slosh occur in pressing, button there should be hollow out position in addition, extraneous air is set to enter interior Portion.The shell of small button needs to be in close contact with soft rubber, relatively simple herein, because soft rubber is flexible in itself, quality It is softer, there is good plasticity again, be relatively easy to realize, be not described herein.Due to the unstability of little spring, therefore There can be smaller rock during pressing at Rubber end or rubber sleeve so that Rubber end or rubber sleeve can not completely disengage from small button Shell, adjust pipette in page height when, it is only necessary to the small button of pressing gently make Rubber end or rubber sleeve with it is small Button shell departs from, and exposes tiny holes, now ambient atmos are entered by small button in the cone space of soft rubber, but by Small in the space exposed, the speed that gas flows into soft rubber cone space is slow, and the liquid in pipette slowly flows out, and reaches adjustment The effect of solution height., it is necessary to which we transfer the solution into the place for needing to shift after adjustment height, us are now just needed Small button is pressed so that Rubber end or rubber sleeve completely disengage from shell, such sealed environment is broken, thus it is extraneous basic Cone space such as rubber is communicated.The liquid that ambient atmos are entered in inner space, pipette flows out under gravity Pipette.Need herein illustratively, the equipment is only applicable in pipette without " blowing " printed words.

(7) check (non-return) valve：There is check (non-return) valve at two in the present apparatus, check (non-return) valve is the dry type check (non-return) valve used.It is non-return that this is designed Valve is similar with the check (non-return) valve in pumped well, rather than metallic article check (non-return) valve, this check valve structure is simple, uses thin rubber Product is made, and valve is closed by its own resilient effect of rubber, and sealing state is under closed mode.This device It is simple in construction easy to use, when enabling this to be designed to repeated presses pressure-button by the interaction of two check (non-return) valves The absorption work repeated.The unlatching of check (non-return) valve valve needs certain pressure, and this pressure is when being that piston is down or up What the air pressure of inner air was provided, so cause to draw the error in work.In view of the pressure needed for check (non-return) valve valve opening Power is, it is necessary to by the high slightly higher than expected of the cuboid in framework in manufacturing process.And the quarter that pointer is pointed to The top of initial position should be in by spending the initial position of line, when internal pressure enables the valve of non-return valve to open, Pointer points to the initial position of graduation mark, and test that specifically should be in manufacturing process is defined.

The application method of the utility model device is：

(1) amount of solution that will be measured is determined, pipette is inserted from the hollow space of the trapezoidal shape of soft rubber, ring The mouth of pipe of pipette is fixed and sealed up by shape projection；

(2) hold the equipment, will expose with graduation mark position it is before eyes facilitate reading, the lower end of pipette is inserted will In the solution to be measured, the absorption work of liquid is ready for；

(3) finger press pressure button is used, pointer is observed, when pointer points to the volume that will be measured on graduation mark, Stop pressing, draw solution；

(4) 4mL is once drawn in pressing completely, when the liquor capacity that need to be drawn is more than 4mL, is then needed secondary pressing, is grasped Make identical with (3)；

(5) draw after terminating, if solution height exceedes required height in pipette, need to adjust by small button Solution height in pipette, pressing dynamics now is unsuitable excessive, crosses conference and causes speeding for solution decrease speed, is unfavorable for The regulation of liquid level.

(6) draw solution is finished, and pressing pocket buttons discharge solution.

(7) after solution discharges, pipette is taken out, cleaning pipette or other operations are then carried out.

The advantage of technical solutions of the utility model is：

(1) being capable of convenient draw solution：4 milliliters of solution, the design can be drawn after press pressure button completely every time The piston at power position be square shape, therefore it is relatively simple graduation mark is drawn at overall framework, pointer is with pressing Button connection can follow the movement of pressure-button, then pointer is moved down when pressing, and can determine that by the graduation mark of sensing will The amount of draw solution；

(2) adjustment solution position：When carrying out solution absorption work, the solution of absorption can be again when being unsatisfactory for required volume Press pressure button once is lifted up the position of solution.It can press small when solution position has exceeded expected position Type button, the decrease speed of the different control solution by pressing dynamics.The position of solution is adjusted by the two buttons.

(3) it is perfect to adapt to various pipettes：The specification of pipette is different, and their radius is also different, and this is designed to fit Answer the pipette of main flow；

(4) part of the instrument is all part simple in construction, and manufacture craft is simple, is adapted to processing；Cheap, this sets Meter is without special material, and construction so that in terms of material selection, and making aspect are all relatively simple, reduce making into This；Size is suitable, length 8.4cm, radius 2cm, is adapted to the grasping of palm；

(5) it is easy to use：Quantitative and informative draw solution, the volume number of draw solution can be provided by possessing graduation mark Value, it is user-friendly；Button, and observation graduation mark can need to only be pressed with one-handed performance when using.

Brief description of the drawings

Fig. 1：The dimensional structure diagram of new liquid relief pump of the present utility model；

Fig. 2：The sectional view of new liquid relief pump of the present utility model；

Fig. 3：The structural representation of the framework of new liquid relief pump of the present utility model；

Fig. 4：The structural representation of the pressure-button of new liquid relief pump of the present utility model；

Fig. 5：The dimensional structure diagram of the nut of new liquid relief pump of the present utility model；

Fig. 6：The sectional view of the nut of new liquid relief pump of the present utility model；

Fig. 7：The structural representation of the screw rod of new liquid relief pump of the present utility model；

Fig. 8：The sectional view of the screw rod of new liquid relief pump of the present utility model；

Fig. 9：The structural representation of the spring of new liquid relief pump of the present utility model；

Figure 10：The sectional view of the soft rubber of new liquid relief pump of the present utility model；

Figure 11：The structural representation of the small button of new liquid relief pump of the present utility model；

Wherein：1 be framework, 11 be pressure-button lay space, 12 be pointer lay space, 13 be piston lay space, 14 be pipette connection space, 15 be gap, 2 be pressure-button, 21 be nut, 22 be screw rod, 23 be piston, 24 be the brim of a hat I, 25 it is internal thread, 26 is external screw thread, 27 is the brim of a hat II, 28 is check (non-return) valve I, 3 is spring, and 4 be pointer, untill 5 are soft rubber, 51 Inverse valve II, 52 are that small button lays space, 53 is circular protrusion, 6 are small button, 61 are shell, 62 are pressing lever, 63 are small bullet Spring, 64 are Rubber end or rubber sleave.

Embodiment

The utility model provides a kind of new liquid relief pump, including framework 1, pressure-button 2, spring 3, pointer 4, soft rubber 5 With small button 6, as shown in figs. 1-11：

Described framework, generally solid cylindrical structural, but inside is divided into four hollow spaces：Pressure-button is pacified 11, pointer lays space 12, piston and lays space 13 and pipette connection space 14 between emptying；Wherein：Described pressure-button The topmost portion for being spatially located at lower portion is laid, cylinder is shaped as, moved towards identical with framework；Described pointer lays space The side in space is laid positioned at pressure-button, elliptical cylinder-shape is shaped as, moves towards vertical with framework and lays space with pressure-button It is connected；Described piston, which is laid, is spatially located at the underface that pressure-button lays space, is shaped as rectangular parallelepiped structure, upper surface Space is laid with pressure-button to be connected；Described pipette connection space is located at the underface that piston lays space, is shaped as Cylinder, upper surface is laid space with piston and is connected, and the side wall upper part of pipette connection space offers a gap 15；Institute The framework stated, overall material is PP plastics (polypropylene), and overall specification is：Radius 2cm, high 8.4cm；Wherein, pressure is pressed Button lay space specification be：Radius 1.5cm, high 2.5cm, piston lay space specification be：Long 2cm, width 2cm, high 2.3cm (i.e. top and bottom are square, surrounding is rectangle, it is considered to which piston occupies partial volume), the specification of pipette connection space is： Radius 1.8cm, high 3cm.Framework, height residue 0.6cm, be above and below plastics thickness, every 0.3cm；And pointer lays space, It is the motion of pointer to be adapted to without particular/special requirement.Framework plays supporting function, is the main knot for supporting whole instrument Structure.

Described pressure-button, including press device and piston 23, described press device include nut 21 and screw rod 22, Nut and screw rod are installed together in the way of spiral lamination, and the end of screw rod is fixedly connected with described piston 23；Described piston Center of inside at be provided with check (non-return) valve I 28；The bar wall periphery of described screw rod is arranged described spring 3；Described screw rod The upper part of bar wall is fixedly connected with described pointer；Described nut 21, is shaped as cylinder, and upper and lower end face is open, and The outer of lower surface is provided with the brim of a hat I 24；The inner homogeneous of described nut is distributed with internal thread 25；Described nut, circle The radius of cylindrical section is 1cm, height 3cm, and the radius of the brim of a hat I parts is 1.5cm, and the overall material of nut is (poly- for pp plastic cement Propylene)；Described screw rod, the topmost portion of bar portion is uniformly distributed with external screw thread 26, and the outer of externally threaded bottom is provided with The brim of a hat II 27, the lowermost part of bar portion sets described piston；The overall material of described screw rod is pp plastic cement；Described spiral shell The external screw thread 26 of bar is used cooperatively with the internal thread 25 of nut；Described nut, screw rod are installed together in the way of spiral lamination The brim of a hat I, the brim of a hat II are brought into close contact together afterwards and the brim of a hat I is located at the brim of a hat II top；Described pointer is located at the described the brim of a hat II 27 outside, described spring is located at bar wall periphery, the brim of a hat II lower section, the top of piston of screw rod；Described piston is Y-type seal ring, is shaped as rectangular shape, and specification is long 2cm, width 2cm, high 0.2cm；Described check (non-return) valve I 28 stops for rubber Inverse valve.

Described soft rubber 5, is shaped as cylinder, and inner hollow, hollow top is divided into rectangular shape, bottom and is divided into Trapezoidal shape；Be provided with the top of the hollow space of rectangular shape check (non-return) valve II 51, middle part be vertically installed with it is one small by Button lays space 52, and the surrounding of the hollow space of trapezoidal shape is provided with circular protrusion 53, and pipette is inserted at circular protrusion.

Described small button includes shell 61, pressing lever 62, little spring 63, Rubber end or rubber sleave 64：Described is outer Shell is cylinder, and inner hollow, upper and lower end face respectively offers a circular hole；Worn in the middle part of described pressing lever, the body of rod Cross hole and be provided with a circle projection I so that will so as to be located at the topmost for the bar wall being located in the middle part of the inside of shell, the body of rod in shell The body of rod is fixed in shell, and the top of the body of rod is for press head and positioned at the outside of the upper surface of shell, and the bottom of the body of rod is positioned at outer The outside and end of the lower surface of shell are provided with a circle projection II；Described projection II outer cover is provided with Rubber end or rubber peel Set；Described little spring is sheathed on the middle part of the body of rod and positioned at the inside of shell, and the radius of little spring is more than shell lower end face The radius in hole；Described small button is located at small button and lays interior volume, and the press head of pressing lever stretches out small button placement sky Between；Small button, entire length is 2.3cm, and the radius of shell is 0.3cm.

Described nut and the part being installed together of screw rod are located at the outside of framework, and the remainder of screw rod is located at frame Pressure-button inside frame is laid in space；Described piston is located at the piston of lower portion and laid in space；Described pointer Laid positioned at the pointer of lower portion in space and end extend out to the outside of framework；Described soft rubber plug connects in pipette Connect in space, the end of small button is extend out to the outside of framework by opening position；

The outside of described framework is provided with graduation mark, and graduation mark is laid space along pointer and set, the end of pointer Bending and sensing graduation mark.

Described spring, material is low manganese spring steel material；Described pointer, material is stainless steel；Described is soft Rubber, material is PVDF；Described check (non-return) valve I 28, check (non-return) valve II 51 is dry type check (non-return) valve.

Examples detailed above is technical concept and technical characterstic to illustrate the invention, can not limit the present invention's with this Protection domain.Equivalent transformation or modification that all essence according to the present invention is done, should all cover in protection scope of the present invention Within.

Claims (8)

1. a kind of new liquid relief pump, including framework (1), pressure-button (2), spring (3), pointer (4), soft rubber (5) and small press Button (6), it is characterised in that：

Described framework, generally solid cylindrical structural, but inside is divided into four hollow spaces：Pressure-button is laid empty Between (11), pointer lay space (12), piston and lay space (13) and pipette connection space (14)；Wherein：Described pressure Button lays the topmost portion for being spatially located at lower portion, is shaped as cylinder, moves towards identical with framework；Described pointer is laid The side that pressure-button lays space is spatially located at, elliptical cylinder-shape is shaped as, moves towards vertical with framework and is laid with pressure-button Space is connected；Described piston, which is laid, is spatially located at the underface that pressure-button lays space, is shaped as rectangular parallelepiped structure, on End face is laid space with pressure-button and is connected；Described pipette connection space is located at the underface that piston lays space, shape Shape is cylinder, and upper surface is laid space with piston and is connected, and the side wall upper part of pipette connection space offers a gap (15)；

Described pressure-button (2), including press device and piston (23), described press device include nut (21) and screw rod (22), nut and screw rod are installed together in the way of spiral lamination, and the end of screw rod is fixedly connected with described piston (23)；It is described Piston center of inside at be provided with check (non-return) valve I (28)；The bar wall periphery of described screw rod is arranged described spring (3)；Institute The upper part of the bar wall for the screw rod stated is fixedly connected with described pointer (4)；

Described soft rubber (5), is shaped as cylinder, and inner hollow, hollow top is divided into rectangular shape, bottom and is divided into ladder Shape of solids；Be provided with the top of the hollow space of rectangular shape check (non-return) valve II (51), middle part be vertically installed with it is one small by Button lays space (52), and the surrounding of the hollow space of trapezoidal shape is provided with circular protrusion (53), and pipette inserts in ring-type and dashed forward At rising；

Described small button includes shell (61), pressing lever (62), little spring (63), Rubber end or rubber sleave (64)：It is described Shell (61) for cylinder, inner hollow, upper and lower end face respectively offers a circular hole；Described pressing lever (62), The middle part of the body of rod is through hole so as to which positioned at the inside of shell, body of rod middle part is located at the topmost of the bar wall in shell provided with a circle Projection I is so as to which the body of rod is fixed in shell, and the top of the body of rod is for press head and positioned at the outside of the upper surface of shell, the body of rod Bottom be located at shell lower surface outside and end provided with a circle projection II；Described projection II outer cover is provided with rubber Glue head or rubber sleave (64)；Described little spring (63) is sheathed on the middle part of the body of rod and positioned at the inside of shell, little spring Radius is more than the radius of shell lower surface hole；Described small button is located at small button and lays space (52) inside, and pressing lever (62) press head stretches out small button and lays space (52)；

Described nut and the part being installed together of screw rod are located at the outside of framework (1), and the remainder of screw rod is located at frame Pressure-button inside frame is laid in space (11)；Described piston is located at the piston of lower portion and laid in space (13)；Institute The pointer stated is located in the pointer of lower portion placement space (12) and end extend out to the outside of framework；Described soft rubber (5) fill in pipette connection space (14), the end of small button (6) is extend out to the outside of framework by gap (15)；

The outside of described framework is provided with graduation mark, and graduation mark is laid space (12) along pointer and set, the end of pointer Bending and sensing graduation mark.

2. liquid relief pump according to claim 1, it is characterised in that：Described framework (1), overall material is PP plastics, Overall specification is：Radius 2cm, high 8.4cm；Wherein, the specification of pressure-button placement space (11) is：Radius 1.5cm, height 2.5cm, piston lay space (13) specification be：Long 2cm, width 2cm, high 2.3cm, the specification of pipette connection space (14) For：Radius 1.8cm, high 3cm.

3. liquid relief pump according to claim 1, it is characterised in that：Described nut (21), is shaped as cylinder, upper and lower End face is open, and the outer of lower surface is provided with the brim of a hat I (24)；Internal thread is distributed with the inner homogeneous of described nut (25)；Described nut, the radius of cylindrical part is 1cm, height 3cm, and the radiuses of the brim of a hat I parts is 1.5cm, nut it is whole Body material is pp plastic cement；

Described screw rod (22), the topmost portion of bar portion is uniformly distributed with external screw thread (26), and the outer of externally threaded bottom is set The brim of a hat II (27) is equipped with, the lowermost part of bar portion sets described piston (23)；The overall material of described screw rod is pp plastic cement.

4. liquid relief pump according to claim 3, it is characterised in that：The external screw thread (26) and nut of described screw rod (22) (21) internal thread (25) is used cooperatively；Described nut, screw rod are installed together rear the brim of a hat I, the brim of a hat in the way of spiral lamination II is brought into close contact together and the brim of a hat I is located at the brim of a hat II top.

5. the liquid relief pump according to claim 1 or 3, it is characterised in that：Pointer (4) is located at the brim of a hat II (27) outside, bullet Spring (3) is located at bar wall periphery, the brim of a hat II (27) lower section, the top of piston (23) of screw rod (22).

6. liquid relief pump according to claim 1, it is characterised in that：Described piston (23) is y-type seal ring, is shaped as length Cube shape, specification is long 2cm, width 2cm, high 0.2cm；Described check (non-return) valve I (28) is rubber check (non-return) valve.

7. liquid relief pump according to claim 1, it is characterised in that：Described spring (3), material is low manganese spring steel material Matter；Described pointer (4), material is stainless steel；Described soft rubber (5), material is PVDF；Described check (non-return) valve I (28), check (non-return) valve II (51) is dry type check (non-return) valve.

8. liquid relief pump according to claim 1, it is characterised in that：Described small button (6), entire length is 2.3cm, outside The radius of shell (61) is 0.3cm.