CN206823239U - A kind of SPE decompressor for being used to adjust flow velocity - Google Patents

Abstract

The utility model belongs to common experimental room apparatus field, is related to a kind of SPE decompressor for being used to adjust flow velocity, and its feature includes plastic straw (1), hard shell (2) and spring by (3) three parts of pipe.Solid-phase extraction device can be connected with the SPE decompressor for adjusting flow velocity by rubber tube, the frequency and dynamics of pipe are pressed by pressing spring by changing, the vacuum in decompressor can be adjusted, and then controls flow rate of liquid in solid-phase extraction device and keeps constant.Therefore, the utility model can improve SPE efficiency, reduce loss, and avoiding the occurrence of Cucumber can not elute, elute or solid-phase extraction device connection vavuum pump causes that flow velocity is too fast, the incomplete phenomenon of elution.

Description

A kind of SPE decompressor for being used to adjust flow velocity

Technical field

The utility model belongs to laboratory paraphernalia, is related to a kind of SPE decompressor, and being related to one kind especially can arbitrarily adjust Save activation, loading, elution, the SPE decompressor of elution process flow velocity.

Background technology

In SPE solution by the flow velocity of pillar depend on column packing, activating solvent, loading solvent, elution solvent and The physicochemical property of the materials such as eluting solvent.In actual experiment operation, above-mentioned four kinds of solvents are generally incomplete same, therefore will Occur different in flow rate.At present, the change flow rate device that most of laboratories use has syringe-type push rod and vavuum pump.Syringe-type Push rod can make it accelerate to flow out by changing gas volume size in cylinder to compress liquid in pillar；Vavuum pump is then made by motor Negative pressure is formed in device, by air pressure balance, liquid in pillar is smoothly flowed out, thus changes flow rate of liquid, and vacuum is not It is adjustable.

However, syringe-type push rod can produce some problems when handling batch samples, a push rod is for multiple small Cross pollution can be caused during post, and can then be made troubles on each pillar using push rod to operator；Some liquid are in vacuum Pillar outflow can be run through in the presence of pump, causes to elute, elute insufficient, influence experimental result.

Therefore, a kind of simple and convenient, the SPE decompressor for adjusting flow velocity helps to save experimenter's reality Test the operating time, and effectively improve the efficiency and sample recovery rate of SPE.At the same time, the device is light compact, avoids Using power supply, the energy in laboratory is saved to a certain extent, and can be used for outdoor experiment.

The content of the invention

Mesh of the present utility model is to avoid above mentioned problem, invents a kind of simple and convenient, energy-conservation, can handle simultaneously large quantities of Sample is measured, and for adjusting the laboratory SPE decompressor of flow velocity.

To realize above-mentioned function, the utility model is related to it is a kind of be used to adjust the SPE decompressor of flow velocity, its It is characterised by：The device is combined by plastic straw, hard shell and spring by pipe；Plastic straw is hollow for both ends open Cylinder, hard shell are the hollow cylinder of single-side sealing, and there is a circular hole at its sealing surface center, plastic straw by hard outside The center hole insertion of shell sealing surface, and by rubber seal fixing seal, and there is intake valve at the cross section of insertion end.

Intake valve is respectively made up of with air outlet valve the perforate plastic sheet containing central cross frame and light plastic thin slice two parts； Wherein, one end of the perforate plastic sheet containing central cross frame is connected with one end of light plastic thin slice, and light plastic is thin Piece can be completely covered on the surface containing central cross frame perforate plastic sheet；The light plastic sheet plane of intake valve and apertures baffle plate Relatively, the light plastic thin slice of air outlet valve is located at the outside of hard shell, and air outlet valve utilizes rubber with hard shell side wall junction Glue sealing ring fixing seal.Due to the device need by by pressing spring by pipe make the regular opening and closing of intake valve and air outlet valve come Reach the purpose of decompression, therefore, the plastic sheet being bonded completely can ensure the vacuum inside decompressor；Meanwhile air outlet valve with Rubber seal between hard shell can improve the air-tightness of decompressor.

There is apertures baffle plate inside hard shell, plane where apertures baffle plate is parallel with hard shell sealing surface, and tightly It is stuck in hard shell；Wherein, apertures baffle plate is used for one end that connecting spring presses power assistant spring in pipe, ensure apertures baffle plates not because Flexible simultaneously mobile a, fixation for power assistant spring, meanwhile, the aperture on baffle plate can make hard shell and spring by between pipe Air circulation, to reach the purpose by changing device internal gas volume by pipe by pressing spring.

Spring is also the hollow cylinder of single-side sealing by pipe, by rubber seal and is connected to hard at its openend At the openend of shell；Spring has a root long degree to be more than spring by the power assistant spring of pipe, the both ends of power assistant spring by the inside of pipe It is in contact respectively with apertures baffle plate and spring by the sealing surface of pipe；Rubber seal is while ensureing that spring is moved left and right by pipe Also improve the air-tightness inside device.

The beneficial effects of the utility model are as follows：

The utility model is combined innovation, invention is a kind of to be used to adjust flow velocity according to laboratory routine operation demand SPE decompressor.Compared to the decompression instrument with routine --- reduced vacuum pump and syringe-type push rod, the invention avoid because The system gas leakage caused by with reference to not close of syringe-type push rod and pillar, it is connected with vavuum pump because vavuum pump extracts vacuum efficiency Vacuum is inadequate in device caused by lowly, and liquid can not smoothly flow out, or causes liquid in pillar due to connection vavuum pump The problems such as body is all lost in a short time, improves impurity in solid phase extraction procedure and be leached degree and elute the recovery of object Rate；And the decompressor can be connected with solid-phase extraction device, can once solve batch samples experiment problem；In addition, the dress It is mostly plastics and rubber using material to put, light compact, is easy to carry about with one, while avoids using power supply, cost-effective.

Brief description of the drawings

Fig. 1 is to be used to adjust flow velocity SPE decompressor schematic diagram；

Wherein：1. plastic straw；2. hard shell；3. spring is by pipe；

Fig. 2 is to be used to adjust plastic straw schematic diagram in flow velocity SPE decompressor；

Wherein：4. intake valve；8. rubber seal；

Fig. 3 is to be used to adjust hard shell schematic diagram in flow velocity SPE decompressor；

Wherein：5. air outlet valve；6. apertures baffle plate；8. rubber seal；

Fig. 4 is to be used to adjust in flow velocity SPE decompressor spring by pipe schematic diagram；

Wherein：7. power assistant spring；8. rubber seal；

Fig. 5 is hard shell air outlet valve schematic diagram；

Wherein：8. rubber seal；Perforate plastic sheet containing central cross frame inside 9.；10. light plastic thin slice；

Embodiment

It is below in conjunction with the accompanying drawings and specific real to make those skilled in the art be better understood from the technical solution of the utility model Applying example, the utility model is described in further detail.All accompanying drawings are rough schematic view, only embody this hair in a schematic way Bright basic structure.

Embodiment one

Decompressor as shown in Figure 1, including plastic straw (1), hard shell (2) and spring are by pipe (3).Laboratory technician The device, which need to be adjusted, makes the opening direction of air outlet valve upward, and another openend of plastic straw and SPE are connected using rubber tube Device, then vacuum can be extracted and adjust the solid-phase extraction device of flow velocity by forming one.

As shown in Figure 2, Figure 3, Figure 4, intake valve (4) can be as spring be by the depth and frequency of pipe (3) pressing with air outlet valve (5) There is rubber rate free switch, the junction of perforate plastic sheet (9) and hard shell (2) in air outlet valve (5) containing central cross frame Glue sealing ring (8), therefore ensure the air-tightness of air outlet valve (5)；Meanwhile rubber seal (8) be used for connect hard shell (2) with Spring is by pipe (3), it is ensured that situations such as spring can be moved left and right by pipe and avoid gas leakage inside decompressor；Hard shell (2) Internal apertures baffle plate (6) makes hard shell (2) with spring by the internal air of pipe (3) while fixed power assistant spring (7) Circulation.

When by pressing spring by pipe (3), power assistant spring (7) is squeezed contraction, and spring is by pipe (3) and hard shell (4) Interior volume of air (V) reduces, and intake valve (4) by air drag due to being closed, air outlet valve (5) then managed interior gas extrusion Open, now the large quantity of air inside device is discharged；When trip spring is by pipe (3), according to Hooke's law (Hooke ' s Law) F=kx, power assistant spring (7) recover former long, and spring is moved by pipe (3) with the elongation of power assistant spring (7), now in device Gas volume (V) becomes big, but internal gas molecular number (N) keeps constant, according to The Ideal-Gas Equation PV=NRT, in temperature On the premise of degree is certain, the pressure (P) in device reduces and is less than atmospheric pressure.Therefore, in the presence of atmospheric pressure, outlet Valve (5) is closed, while intake valve (4) is then opened by the air inside solid-phase extraction device, to ensure solid-phase extraction device with subtracting Air pressure balances with atmospheric gas pressure in the system that pressure device is formed, and atmospheric pressure, which can oppress liquid in pillar, by pillar, makes its suitable Profit outflow；System inner and outer air pressure difference is bigger, and flow rate of liquid is faster, therefore, can be by adjusting the frequency by pressing spring by pipe (3) Arbitrarily change device internal gas volume (V), and then adjusting apparatus air pressure inside (P) with depth, it is final to realize control liquid flow The purpose of speed.

Central cross frame (9) shown in Fig. 5 can effectively support light plastic thin slice (10), make intake valve (4) and plastics Tubule (1) cross section is parallel, and air outlet valve (5) is parallel with hard shell (2) side wall tangent line, effectively avoids due to device inner and outer air pressure The excessive inside for causing rigid plastics thin slice (10) to be absorbed in plastic straw (1) or hard shell (2) of difference, thus generation device leaks Phenomena such as gas.

The solid phase decompression extraction equipment for being used to adjust flow velocity in above the utility model embodiment is described in detail. Apply specific case herein to be set forth principle of the present utility model and embodiment, the explanation of above example is It is used to help understand core concept of the present utility model, can also be to this practicality in the case where not departing from the utility model principle Some improvement of new carry out and modification, these are improved and modification is also fallen into the scope of protection of the utility model.

Claims (4)

1. A kind of 1. SPE decompressor for being used to adjust flow velocity, it is characterised in that：The device can be divided into plastic straw (1), Hard shell (2) and spring are by pipe (3) three parts；Wherein, plastic straw (1) is the hollow circular cylinder of both ends open, outside hard Shell (2) is the hollow cylinder of single-side sealing, and there is a circular hole at its sealing surface center, and plastic straw (1) is close by hard shell (2) The center hole insertion of front cover, and by rubber seal (8) fixing seal, and there is intake valve at the cross section of insertion end (4)；The side wall of hard shell (2) has air outlet valve (5), and air outlet valve (5) utilizes rubber close with hard shell (2) side wall junction Seal (8) fixing seal；There is apertures baffle plate (6), plane and hard shell where apertures baffle plate (6) inside hard shell (2) (2) sealing surface is parallel, and is tightly stuck in hard shell (2)；Spring is also the hollow cylinder of single-side sealing by pipe (3), its It is connected by rubber seal (8) at openend and with the openend of hard shell (2)；Spring has one by the inside of pipe (3) Length is more than power assistant spring (7) of the spring by pipe (3), and the both ends of power assistant spring (7) are respectively with apertures baffle plate (6) and spring by pipe (3) sealing surface is in contact.
2. A kind of 2. SPE decompressor for being used to adjust flow velocity according to claim 1, it is characterised in that：It is described enter Air valve (4) is with air outlet valve (5) respectively by the perforate plastic sheet (9) containing central cross frame and light plastic thin slice (10) two parts group Into；Wherein, one end of the perforate plastic sheet (9) containing central cross frame is connected with one end of light plastic thin slice (10), and Light plastic thin slice (10) can be completely covered on the surface containing central cross frame perforate plastic sheet (9)；The lightweight of intake valve (4) With apertures baffle plate (6) relatively, the light plastic thin slice (10) of air outlet valve (5) is located at hard shell (2) in plastic tab (10) face Outside.
3. A kind of 3. SPE decompressor for being used to adjust flow velocity according to claim 1, it is characterised in that：Air outlet valve (5) opening direction is in the top of intake valve (4) light plastic thin slice (10) opening direction.
4. A kind of 4. SPE decompressor for being used to adjust flow velocity according to claim 1, it is characterised in that：Apertures are kept off The hole number of plate (6) should be no less than 2, and be evenly distributed on apertures baffle plate (6).