阅读说明：本技术 一种用于移液管、吸量管的新型吸耳球 (Novel suction ball for pipette and pipette tube ) 是由 刘峰 刘欣迪 于 2021-10-10 设计创作，主要内容包括：本发明公开了一种用于移液管、吸量管的新型吸耳球,属于化学仪器领域,包括主管体、套设于主管体上的弹性空心球,主管体内活动连接有贯穿主管体顶部的移动内管,主管体内下部连接有用来锁紧移液管或吸量管的安装锁定管,移动内管内设有上单向阀和下单向阀,且移动内管一侧开设有第一放气孔、第二通气孔及第二排气孔,主管体一侧对应开设有第二放气孔、第一通气孔及第三排气孔,移动内管上端连接有通气管,移动内管下端设有连接到主管体上的第一弹簧。本发明能满足现有吸耳球的功能,且操作简单,可单手操作,适合新手使用；且操作过程中还能避免接触液体,有效防止移液管、吸量管使用过程中易挥发腐蚀有毒液体对手指皮肤的伤害。(The invention discloses a novel suction ball for a pipette and a pipette, which belongs to the field of chemical instruments and comprises a main pipe body and an elastic hollow ball sleeved on the main pipe body, wherein a movable inner pipe penetrating through the top of the main pipe body is movably connected in the main pipe body, an installation locking pipe used for locking the pipette or the pipette is connected to the lower part in the main pipe body, an upper check valve and a lower check valve are arranged in the movable inner pipe, a first air release hole, a second air release hole and a second air release hole are formed in one side of the movable inner pipe, a second air release hole, a first air vent hole and a third air release hole are correspondingly formed in one side of the main pipe body, an air vent pipe is connected to the upper end of the movable inner pipe, and a first spring connected to the main pipe body is arranged at the lower end of the movable inner pipe. The invention can meet the function of the existing suction bulb, has simple operation, can be operated by one hand and is suitable for being used by new hands; and can also avoid contacting liquid in the operation process, effectively prevent the harm of volatile corrosive toxic liquid to the finger skin in pipette, pipette use.)

1. The novel suction ball for the pipette and the pipette is characterized by comprising a vertically arranged moving inner tube (19), a main tube body (18) sleeved outside the moving inner tube (19) and an elastic hollow ball (15) hermetically sleeved outside the main tube body (18), wherein the middle part of the upper end surface of the moving inner tube (19) is communicated with a vent tube (2) with the caliber smaller than that of the moving inner tube (19), and one side of the vent tube (2) is provided with a main vent hole (20) which is always positioned above the main tube body (18); at least two upper bracket strips (9) are fixed below the movable inner tube (19) in the main tube body (18) at equal intervals along the circumference of the main tube body (18), first springs (8) contacting the bottom of the movable inner tube (19) are fixed on the upper end faces of the upper bracket strips (9), and lower through holes (21) communicating the interior of the movable inner tube (19) with the interior of the main tube body (18) are formed in the bottom of the movable inner tube (19); a first air vent (4), a second air vent (11) and a second air vent (17) are formed in one side of the moving inner pipe (19) from top to bottom, an upper one-way valve (6) located between the first air vent (4) and the second air vent (11) is arranged in the moving inner pipe (19), and a lower one-way valve (12) located between the second air vent (11) and the second air vent (17) is arranged in the moving inner pipe (19); one side of the main pipe body (18) is sequentially provided with a second air vent (5), a first air vent (10) and a first exhaust hole (16) which are communicated with the inner cavity of the elastic hollow ball (15), and when the first spring (8) is in a natural state, the first air vent (10) is communicated with the second air vent (11) in an aligning manner.

2. The new type of suction bulb for pipettes and pipettes according to claim 1, wherein the upper port of the main tube (18) is sleeved outside the upper end of the inner moving tube (19), and the inner side of the upper end of the main tube (18) is fixed with a fixing clip (3) surrounding the upper end of the inner moving tube (19).

3. The new type of suction ball for pipettes and pipettes according to claim 1, wherein the corresponding movable inner tubes (19) at the upper and lower sides of the first vent hole (4), the second vent hole (11) and the second vent hole (17) are all fixedly sleeved with a sealing rubber ring (7) attached to the inner wall of the main tube body (18).

4. A new type of suction ball for pipettes, pipettes according to claim 1 characterized by the fact that the difference in height between said first venting hole (4) and said second venting hole (5) is equal to the difference in height between said second venting hole (17) and said first venting hole (16) when said first spring (8) is in its natural state.

5. The new type of suction ball for pipettes, according to claim 1, characterized in that the top of the vent tube (2) is fixed with a horizontally arranged tapping button (1).

6. The novel suction ear ball for the pipette and the pipette according to any one of claims 1 to 5, wherein a mounting locking tube (22) for detachably connecting with the pipette or the pipette is installed at the lower end of the main tube body (18), a stepped cavity (23) penetrating through the lower end surface of the mounting locking tube (22) is longitudinally formed in the mounting locking tube (22), glass tube sealing rings (13) are embedded in different calibers of the stepped cavity (23), a glass tube fixer (14) is arranged at the lower part of the stepped cavity (23), clamping bars (24) distributed at equal intervals along the circumference of the glass tube fixer (14) are formed at the upper part of the glass tube fixer (14), the upper end of each clamping bar (24) is an inclined plane inclined from inside to outside, and at least two fin plates (25) extending transversely and outwards are fixed at equal intervals along the circumference of the bottom of the glass tube (14), notch (26) with notch cuttype cavity (23) intercommunication are seted up at the top of installation locking pipe (22), be located the top of installation locking pipe (22) in being responsible for body (18) and be fixed with two at least lower flange strips (27) along being responsible for body (18) week equidistant, and lower bottom surface is connected with second spring (28) that are located notch (26) down lower flange strip (27).

Technical Field

The invention relates to the field of chemical instruments, in particular to a novel suction ball for a pipette and a pipette.

Background

Pipettes and pipettes are measuring instruments for accurately measuring solutions with a certain volume, and are widely applied to laboratories of chemistry, chemical industry, medicine and the like. The pipette, pipette tube, is usually an elongated glass tube with a liquid storage portion in the middle and a tip at its lower end. The pipette and the pipette are used by placing a tube body in liquid, forming a pressure difference with the outside to suck the liquid by discharging the volume in the cavity of the upper end suction ear ball, taking off the suction ear ball after enough liquid is sucked, quickly pressing the tube opening with a finger, slowly flowing the liquid out until the concave liquid level of the solution is equal to the scale by controlling the pressure of the finger, and obtaining the required amount of the residual liquid in the tube. In the conventional process of using a pipette to suck liquid, the pipette and the aurilave are operated by two hands, so that the problem of troublesome operation exists. Particularly, when absorbing volatile corrosive liquid such as concentrated hydrochloric acid and concentrated nitric acid, the problem of safety exists when fingers block the upper end of a pipette, the existing suction ear ball cannot be pressed below the liquid level any more, and the liquid with large quantity and density is inconvenient to take.

Disclosure of Invention

1. Technical problem to be solved

The technical problem to be solved by the invention is to provide a novel suction bulb for a pipette and a pipette, which can safely suck volatile corrosive liquid, is simple to use and can be operated by one hand, and overcomes the limitation that the original suction bulb cannot be squeezed again below the liquid level for use.

2. Technical scheme

In order to solve the problems, the invention adopts the following technical scheme:

a novel suction ball for a pipette and a pipette comprises a vertically arranged movable inner tube, a main tube body sleeved outside the movable inner tube and an elastic hollow ball sleeved outside the main tube body in a sealing manner, wherein the middle part of the upper end surface of the movable inner tube is communicated with a vent tube with the caliber smaller than that of the movable inner tube, and one side of the vent tube is provided with a main vent hole which is always positioned above the main tube body; at least two upper convex frame strips are fixed below the movable inner tube in the main tube body at equal intervals along the circumference of the main tube body, first springs contacting the bottom of the movable inner tube are fixed on the upper end faces of the upper convex frame strips, and a lower through hole communicating the interior of the movable inner tube with the interior of the main tube body is formed in the bottom of the movable inner tube; a first air release hole, a second air vent hole and a second air vent hole are formed in one side of the moving inner tube from top to bottom, an upper one-way valve located between the first air release hole and the second air vent hole is arranged in the moving inner tube, and a lower one-way valve located between the second air vent hole and the second air vent hole is arranged in the moving inner tube; one side of the main pipe body is sequentially provided with a second air vent, a first air vent and a first exhaust vent which are communicated with the inner cavity of the elastic hollow ball from top to bottom, and when the first spring is in a natural state, the first air vent is communicated with the second air vent in an aligning manner.

Furthermore, the upper end opening of the main pipe body is sleeved outside the upper end of the movable inner pipe, and a fixing clamp surrounding the upper end of the movable inner pipe is fixed on the inner side of the upper end of the main pipe body. The top of the fixing clip can limit the end point of the upward movement of the movable inner tube, and the movable inner tube is prevented from being pulled out accidentally.

Furthermore, the movable inner tubes corresponding to the upper side and the lower side of the first air release hole, the second air vent hole and the second air vent hole are fixedly sleeved with sealing rubber rings attached to the inner wall of the main tube body. The sealing rubber ring can prevent gas from leaking from the gap between the main pipe body and the movable inner pipe, and ensure the performance of gas transmission of the gas release hole, the vent hole and the exhaust hole.

Preferably, when the first spring is in a natural state, the height difference between the first air release hole and the second air release hole is equal to the height difference between the second exhaust hole and the first exhaust hole. When the inner pipe is moved to the first air vent and the second air vent to be communicated by pressing, the second air vent can be communicated with the first air vent, so that the operation is convenient.

Further, a liquid discharging button horizontally arranged is fixed at the top of the vent pipe. The inner tube can be driven to move downwards conveniently through the liquid discharging button.

As the improvement to above-mentioned scheme, the installation locking pipe that is used for being connected with pipette or pipette are detachable is installed to the lower extreme of being responsible for the body, vertically set up the notch cuttype cavity that link up installation locking pipe terminal surface down in the installation locking pipe, and the equal embedded glass pipe sealing washer of installing of different bore departments of notch cuttype cavity, the lower part of notch cuttype cavity is equipped with the glass pipe fixer, the shaping of glass pipe fixer upper portion has along its periphery equidistant clamping strip that distributes, the upper end of clamping strip is the inclined plane of from inside to outside slope, glass pipe fixer bottom week side is fixed with two at least horizontal outside extension's fin along its periphery equidistant, the notch that has communicated with the notch of notch cuttype cavity has been seted up at the top of installation locking pipe, be responsible for the internal top that lies in installation locking pipe and be fixed with two at least lower flange strips along being responsible for body periphery equidistant, and the lower bottom surface of the lower rack strip is connected with a second spring positioned in the notch. When the pipette or the pipette is installed, the upper end of the pipette or the pipette is inserted into the glass tube fixer and the stepped cavity, the pipette or the pipette is relaxed after the second spring is compressed, at the moment, the glass tube sealing rings clamp two sides of the variable diameter part at the top of the pipette or the pipette, and the clamping strips of the glass tube fixer clamp the thicker part at the upper end of the pipette or the pipette, so that the pipette or the pipette is installed; when the pipette is disassembled, the pipette or the pipette and the installation locking tube are driven to move back to back in the longitudinal direction, and the pipette or the pipette and the novel suction ball can be disassembled.

3. Advantageous effects

(1) In an initial state, only the second vent hole is communicated with the first vent hole to extrude the elastic hollow ball, so that gas in the elastic hollow ball can be discharged through the first vent hole, the second vent hole, the upper check valve and the vent pipe in sequence; the elastic hollow ball is relaxed, so that the negative pressure effect on a pipette or a pipette can be generated, and the successful liquid suction is realized; after the movable inner tube is pressed down, the first air vent is communicated with the second air vent, the second air vent is communicated with the first air vent, the second air vent is not communicated with the first air vent, air can enter a pipette or a pipette from the air vent, the first air vent, the second air vent, the elastic hollow ball, the first air vent and the second air vent in sequence, liquid drainage can be realized, the discharge amount of liquid is determined according to the time of manually pressing a liquid drainage button, once the liquid drainage button is released, the movable inner tube can reset under the reset action of the first spring, and the pipette or the pipette stops liquid drainage. The invention has simple and compact structure, can meet the function of the prior suction bulb, has simple operation, can be operated by one hand and is suitable for being used by new hands.

(2) The invention only needs to extrude and release the elastic hollow ball and press the liquid discharge button in the operation process, and does not need to plug the upper port of the pipette with fingers, so that the liquid can be prevented from being contacted in the operation process, the damage of volatile corrosive toxic liquid to the skin of the fingers in the use process of the pipette and the pipette is effectively prevented, and the volatile corrosive liquid can be safely sucked.

(3) When the invention is applied, the elastic hollow ball is extruded and released, and the state of the inner pipe is moved in a matching way, so that the air pressure state in a pipette or a pipette is adjusted, and the limitation that the original ear sucking ball cannot be extruded again below the liquid level is overcome.

In conclusion, the invention can safely absorb volatile corrosive liquid, is simple to use, can be operated by one hand, and overcomes the limitation that the original suction bulb can not be extruded again below the liquid level.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the main tube 18;

FIG. 3 is a schematic structural view of the movable inner tube 19;

fig. 4 is a schematic structural view of the fixing clip 3;

fig. 5 is a schematic view of the structure for installing the locking tube 22.

Reference numerals: 1. a liquid discharging button; 2. a breather pipe; 3. fixing the card; 4. a first air bleed hole; 5. a second vent hole; 6. an upper one-way valve; 7. sealing the rubber ring; 8. a first spring; 9. an upper ledge bar; 10. a first vent hole; 11. a second vent hole; 12. a lower check valve; 13. a glass tube sealing ring; 14. a glass tube holder; 15. elastic hollow spheres; 16. a first exhaust port; 17. a second vent hole; 18. a primary tube; 19. moving the inner tube; 20. a primary vent; 21. a lower port; 22. installing a locking pipe; 23. a stepped cavity; 24. a clamping strip; 25. a fin plate; 26. a notch; 27. a lower ledge bar; 28. a second spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

The novel suction ball for the pipette and the pipette as shown in fig. 1 comprises a vertically arranged movable inner tube 19, a main tube body 18 sleeved outside the movable inner tube 19, and an elastic hollow ball 15 hermetically sealed and installed outside the main tube body 18, wherein the middle part of the upper end surface of the movable inner tube 19 is communicated with a vent tube 2 with the caliber smaller than that of the movable inner tube 19, and one side of the vent tube 2 is provided with a main vent hole 20 which is always positioned above the main tube body 18; as shown in fig. 2, at least two upper bracket strips 9 are fixed in the main pipe 18 below the movable inner pipe 19 at equal intervals along the circumference of the main pipe 18, a first spring 8 contacting the bottom of the movable inner pipe 19 is fixed on the upper end surface of each upper bracket strip 9, and a lower through hole 21 communicating the inside of the movable inner pipe 19 and the inside of the main pipe 18 is formed at the bottom of the movable inner pipe 19; as shown in fig. 3, a first air vent 4, a second air vent 11 and a second air vent 17 are formed in one side of the moving inner tube 19 from top to bottom, an upper one-way valve 6 located between the first air vent 4 and the second air vent 11 is arranged in the moving inner tube 19, and a lower one-way valve 12 located between the second air vent 11 and the second air vent 17 is arranged in the moving inner tube 19; a second vent hole 5, a first vent hole 10 and a first exhaust hole 16 which are communicated with the inner cavity of the elastic hollow ball 15 are sequentially formed in one side of the main pipe body 18 from top to bottom, and when the first spring 8 is in a natural state, the first vent hole 10 is communicated with the second vent hole 11 in an aligned mode;

the lower extreme of being responsible for body 18 installs the installation locking pipe 22 that is used for with pipette or the detachable connection of pipette, as shown in fig. 5, vertically set up the notch cuttype cavity 23 who link up installation locking pipe 22 lower terminal surface in the installation locking pipe 22, and the equal embedded glass tube sealing washer 13 of installing of different bore departments of notch cuttype cavity 23, the lower part of notch cuttype cavity 23 is equipped with glass tube fixer 14, the shaping of glass tube fixer 14 upper portion has along its periphery equidistant distribution's chucking strip 24, the upper end of chucking strip 24 is the inclined plane from inside to outside slope, 14 bottom week side of glass tube fixer is fixed with two at least horizontal outside extension's fin 25 along its periphery equidistant, the notch 26 that communicates with notch cuttype cavity 23 has been seted up at the top of installation locking pipe 22, it is located the top of installation locking pipe 22 along being responsible for body 18 periphery equidistant being fixed with two at least lower flange strips 27 in the body 18, and a second spring 28 located in the notch 26 is attached to the lower bottom surface of the lower rack bar 27. When the pipette or the pipette is installed, the upper end of the pipette or the pipette is inserted into the glass tube fixer 14 and the stepped cavity 23, the pipette or the pipette is relaxed after the second spring 28 is compressed, at the moment, the glass tube sealing rings 13 clamp two sides of the variable diameter part at the top of the pipette or the pipette, and the clamping strips 24 of the glass tube fixer 14 clamp the thicker part at the upper end of the pipette or the pipette, so that the pipette or the pipette is installed; when the pipette or the pipette is detached, the pipette or the pipette is detached from the new type of suction ball by driving the pipette or the pipette and the mounting lock tube 22 to move back to back in the longitudinal direction.

Example 2

The present embodiment is different from embodiment 1 in that:

in the present embodiment, as shown in fig. 1 and 4, the upper port of the main pipe 18 is sleeved outside the upper end of the movable inner pipe 19, and the fixing clip 3 surrounding the upper end of the movable inner pipe 19 is fixed inside the upper end of the main pipe 18. The top of the fixing clip 3 can define the end point of the upward movement of the movable inner tube 19, and prevent the movable inner tube 19 from being pulled out accidentally.

In this embodiment, the sealing rubber rings 7 attached to the inner wall of the main pipe 18 are fixedly sleeved outside the moving inner pipes 19 corresponding to the upper and lower sides of the first vent hole 4, the second vent hole 11 and the second vent hole 17. The sealing rubber ring 7 can prevent gas from leaking from the gap between the main pipe body 18 and the movable inner pipe 19, and ensure the performance of gas transmission of the gas release hole, the vent hole and the exhaust hole.

In the present embodiment, when the first spring 8 is in a natural state, the height difference between the first and second bleed holes 4 and 5 is equal to the height difference between the second exhaust hole 17 and the first exhaust hole 16. The second exhaust hole 17 can communicate with the first exhaust hole 16 while the inner tube 19 is pushed down to communicate the first exhaust hole 4 with the second exhaust hole 5, facilitating the operation.

In the embodiment, a horizontally arranged liquid discharging button 1 is fixed on the top of the vent pipe 2. The movable inner tube 19 can be driven to move downwards conveniently by the liquid discharging button 1.

Otherwise, the same procedure as in example 1 was repeated.

The above-mentioned novel auricle ball who is suitable for pipette, pipette's concrete function principle does:

when the pipette or the pipette is installed, the upper end of the pipette or the pipette is inserted into the glass tube fixer 14 and is inserted into the stepped cavity 23 of the installation locking tube 22, the second spring 28 is relaxed after being compressed, the glass tube sealing rings 13 clamp two sides of the variable diameter part at the top of the pipette or the pipette, and the clamping strips 24 of the glass tube fixer 14 clamp the thicker part at the upper end of the pipette or the pipette, so that the pipette or the pipette is installed; when in operation, the lower end of a pipette or a pipette is firstly placed in liquid to be sucked, then the elastic hollow ball 15 is extruded, so that the gas in the elastic hollow ball is extruded from the first vent hole 10 and enters the moving inner pipe 19 between the upper one-way valve 6 and the lower one-way valve 12 from the second vent hole 11, and then the gas passes through the upper one-way valve 6 and is discharged along the main vent hole 20 of the vent pipe 2; after the elastic hollow ball 15 is loosened, the resetting action of the elastic hollow ball 15 enables negative pressure to be generated inside the elastic hollow ball 15 and transmitted to the lower part of the main pipe body 18 through the first vent hole 10 and the lower one-way valve 12, and then the elastic hollow ball is sent to a pipette or a pipette through the notch 26 and the stepped cavity 23, so that liquid can be successfully sucked into the pipette or the pipette; when the suction amount is excessive or the liquid needs to be discharged, the liquid discharging button 1 is pressed to drive the movable inner tube 19 to descend (the sealing rubber ring 7 descends along with the descent), the first spring 8 is compressed until the second gas discharging hole 5 is aligned and communicated with the first gas discharging hole 4, the second gas discharging hole 17 is aligned and communicated with the first gas discharging hole 16, and the second gas discharging hole 11 is not communicated with the first gas discharging hole 10, at this time, the external gas can enter the elastic hollow ball 15 along the main gas discharging hole 20, the vent pipe 2, the movable inner tube 19, the second gas discharging hole 5 and the first gas discharging hole 4 in sequence, then enter the lower part of the main tube 18 along the first gas discharging hole 16, the second gas discharging hole 17 and the lower port 21 in sequence, and then enter the pipette or the pipette through the notch 26 and the stepped cavity 23, so that the atmospheric pressures on the upper end and the lower end of the liquid in the pipette or the pipette balance with each other, and the liquid is discharged from the pipette or the pipette by gravity, and the discharge amount of the liquid is determined according to the time of manually pressing the tapping button 1, and once the tapping button 1 is released, the inner tube 19 is moved to be reset by the reset action of the first spring 8, at which time the pipette or the pipette stops tapping.

According to the content, the invention can meet the functions of the existing suction ear ball, is simple to operate, can be operated by one hand and is suitable for being used by new hands; and can also avoid contacting liquid in the operation process, effectively prevent the harm of volatile corrosive toxic liquid to finger skin in pipette, pipette use, the suction bulb can be used in the extrusion of going deep into below the liquid level, also is suitable for getting the liquid that volume density is big.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.