CN209108661U - Continuous extraction apparatus - Google Patents

Abstract

A kind of continuous extraction apparatus, the cavity including being equipped with extraction needle；The cavity is divided into the first working chamber and the second working chamber by partition；The extraction needle includes syringe and needle core, and the first rubber plug is equipped in the first operation port of the first working chamber setting, and the syringe of the extraction needle pierces through the first rubber plug and extend into the first working chamber；Second rubber plug is installed, the detection mouth of the first working chamber setting passes through piping connection detector in the second operation port being arranged in the partition；The sample port of the second working chamber setting passes through piping connection sample jar.During continuous extraction apparatus is extracted, needle core all carries out in the cavity, not will receive the interference of external environment, can meet the requirement of on-site test in experiment field operation.Extraction needle need not move on a large scale, only need to travel to and fro between two chambers by partition, can carry out the extraction of test substance, easy to operate, extraction efficiency is high, and device structure is simple, at low cost.

Description

Continuous extraction apparatus

Technical field

The utility model belongs to water sample detection apparatus field more particularly to a kind of continuous extraction apparatus.

Background technique

In recent years, the water body organisms such as China's surface water, underground water, river water pollution is got worse, semi-volatile organic matter It (SVOCs) is the important water quality indicator of a major class, physiology specified in " water environment quality standard " (GB3838-2002) Toxicological effect is significant, has to human body and seriously endangers.Such as the dirts such as the pollution of Song Hua River nitrobenzene contamination, Changzhou chlorobenzene, pesticide D-D T Dye event causes huge social influence.

Currently, China's extraction-thermal analysis apparatus is applied to laboratory testing mostly, liquid-liquid extraction, Solid Phase Extraction, solid phase are micro- The methods of Thermal desorption (primary, secondary Thermal desorption) is extracted based on manual operation, needs first to penetrate extraction needle in sample, inhale Attached substance to be detected, then extraction is sent to resolver and penetrates again, and substance to be detected feeding resolver is parsed.It is this Mode is cumbersome, at high cost, low efficiency, and external environment is affected to extraction process, is not easy in experiment field operation, It is unable to satisfy the demand of China's water quality on-site test.

Utility model content

The utility model is directed to above-mentioned problem of the existing technology, proposes a kind of easy to operate, extracting efficient, can Realize automation, the continuous extraction apparatus convenient for being operated at the scene.

In order to achieve the above object, the technical solution adopted in the utility model are as follows:

A kind of continuous extraction apparatus for extracting test substance from water sample to be measured, including is equipped with extraction needle Cavity；

The cavity passes through the first working chamber separated be divided into for accommodating test substance and for accommodating water sample to be measured Second working chamber；

The extraction needle includes syringe and needle core, and the needle core is slidably mounted in syringe, to enable needle core to stretch out Or it retracts；

First rubber plug is installed, the syringe of the extraction needle pierces through the in the first operation port of first working chamber setting One rubber plug is simultaneously extend into the first working chamber；

The second rubber plug that can make to extract needle-penetration is installed, to make syringe in the second operation port being arranged in the partition The second rubber plug can be pierced through to extend into the second working chamber；

The detection mouth of the first working chamber setting is used to detect the detector of test substance by piping connection；

The sample port of the second working chamber setting is used to store the sample jar of water sample by piping connection, to make water sample It can be sent in the second working chamber.

Preferably, the sample port includes the first sample port and the second sample port, the height position of first sample port It sets low in the second sample port；

The sample jar is connected by the first sample cell with the first sample port, is equipped with conveying on first sample cell Pump；

Second sample port is connected by the second sample cell with sample jar.

Preferably, the detection mouth includes the first detection mouth being connected with first working chamber one end and works with first The second connected detection mouth of the chamber other end；

First detection mouth is connected with the feeder for transportation work gas by the first detection pipe；

Second detection mouth connects the detector for detecting test substance by the second detection pipe.

Preferably, the bushing pipe that syringe can be made to pass through is installed in first working chamber, the bushing pipe outer wall and first Seal is filled between work cavity wall；

The seal passes through bushing pipe between the first detection mouth and the second detection mouth, the first working chamber to be divided into The first end chamber and second end chamber being connected.

Preferably, described bushing pipe one end is provided with closing in portion, the internal diameter in the closing in portion is gradually reduced from inside to outside, institute Closing in portion is stated to be oppositely arranged with the second rubber plug.

Preferably, the extraction needle is connected with driver,

The driver includes the first driver being connected with needle core and the second driver being connected with syringe, to respectively Drive needle core and syringe axial movement.

Preferably, the first driver and the second driver are driving motor, needle core and syringe are distinguished by lead screw It is connected with the first driver and the second driver；

First driver drives the screw rod rotation of lead screw, and the nut and needle core on same lead screw are affixed；

Second driver drives the screw rod rotation of lead screw, and the nut and syringe on same lead screw are affixed.

Preferably, second working chamber is located at the lower section of the first working chamber.

Preferably, the sewage draining exit of the second working chamber setting is connected with sewage pipe, the row of being equipped on the sewage pipe Dirt pump.

Compared with prior art, it the advantages of the utility model and has the active effect that

1, the cavity of continuous extraction apparatus is divided into two, and the extraction needle of installation can be pierced into the second work where water sample Chamber makes needle core adsorb test substance, is then retracted into syringe, leaves after the second working chamber is moved to the first working chamber, needle core It stretches out, test substance is detached from needle core under the action of working gas, is sent in detector and is detected, all in chamber in whole process It carries out in vivo, not will receive the interference of external environment, the requirement of on-site test can be met in experiment field operation.Extract needle It need not move on a large scale, only need to travel to and fro between two chambers by partition, the extraction of test substance can be carried out, easy to operate, extraction Take high-efficient, device structure is simple, at low cost.

2, sample jar forms circulating for water sample, connect whole water samples can sufficiently by two sample cells Contact pilotage core improves the probability that test substance is contacted with needle core in water sample, improves extraction efficiency.Feeder and detector pass through two A detection pipe forms the circulation of gas, the test substance parsed quickly can be sent to detector and detected, and improves to be measured The detection efficiency of substance.

3, the bushing pipe installed can guide the moving direction of syringe, and syringe is enable to be accurately aimed at the second rubber plug simultaneously It penetrates.Seal can not only fix bushing pipe, while the first working chamber is divided into two chambers, make working gas from by one Chamber all passes through bushing pipe and flow to another chamber, during flowing through bushing pipe, can sufficiently be located at bushing pipe in needle Core contact, parses test substance, guarantees that the test substance on needle core can be sent in detector, guarantees testing result Accuracy.

4, bushing pipe one end is provided with closing in portion, syringe can be enable to be aligned simultaneously the mobile formation centering of syringe The second rubber plug is penetrated, extend into the second working chamber and carries out the extraction of test substance.In addition closing in portion increases gas circulation Flow velocity blows to working gas on needle core faster, faster parses test substance, improves detection efficiency.

5, it extracts the needle tubing of needle and needle core all moves under the driving of driver, to enable a device to realize automation behaviour Make, further increases the intelligence of equipment.Driver makes the movement of needle tubing and needle core more by lead screw driven syringe and needle core Accurately, make the automatic operating of equipment more accurate.

6, the second working chamber for accommodating water sample is located below, and water sample is avoided to cover the second rubber plug, prevents water sample by second Gap between rubber plug and syringe leaks out, and moisture is avoided to guarantee the service life of equipment to the influence of equipment.

7, the second working chamber is connected with dredge pump, the water sample extracted can not only be discharged, while can be by the second work Make the gas discharge in chamber, form negative pressure, water sample is avoided to remain in the second working chamber, causes the intersection between different water samples dirty Dye.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of continuous extraction apparatus；

In above each figure: 1, cavity；1.1, the first working chamber；1.1a first end chamber；1.1b, second end chamber；1.2, second Working chamber；2, needle is extracted；2.1, syringe；2.2, needle core；3, separate；4.1, the first operation port；4.2, the second operation port； 5.1, First rubber plug；5.2, the second rubber plug；6, detection mouth；6.1, the first detection mouth；6.2, the second detection mouth；7, sample port；7.1, A sample mouth；7.2, the second sample port；8, detector；9, sample jar；10, delivery pump；11, feeder；13, bushing pipe；13.1, Closing in portion；14, seal；15, driver；15.1, the first driver；15.2, the second driver；16, lead screw；16.1, screw rod； 16.2, nut；17, sewage draining exit；18, dredge pump.

Specific embodiment

In the following, the utility model is specifically described by illustrative embodiment.It should be appreciated, however, that not having In the case where being further discussed below, element, structure and features in an embodiment can also be advantageously incorporated into other implementations In mode.

In the description of the present invention, it should be noted that term "inner", "outside", "upper", "lower", "front", "rear" etc. The orientation or positional relationship of instruction is positional relationship based on the figure, is merely for convenience of description the utility model and simplification Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation Make, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " are only used for description mesh , it is not understood to indicate or imply relative importance.

As shown in Figure 1, continuous extraction apparatus for extracting test substance from water sample to be measured, detects to be sent to It is detected on instrument, test substance is mainly semi-volatile organic matter.

Continuous extraction apparatus includes the cavity 1 for being equipped with extraction needle 2.

Cavity 1 is the first working chamber 1.1 and the second working chamber 1.2 by 3 points of partition, and the first working chamber 1.1 is for accommodating The test substance parsed, the second working chamber 1.2 is for accommodating water sample to be measured.

Extracting needle 2 includes syringe 2.1 and needle core 2.2, and needle core 2.2 is slidably mounted in syringe 2.1, enables needle core 2.2 It stretches out syringe 2.1 or retracts in syringe 2.1.

The first rubber plug 5.1 is installed in first operation port 4.1 of the first working chamber 1.1 setting, extracts the syringe 2.1 of needle 2 It pierces through the first rubber plug 5.1 and extend into the first working chamber 1.1.First rubber plug 5.1 is covered in syringe 2.1 by its elastic tight Outer wall on, so that syringe 2.1 is moved axially, while guaranteeing leakproofness.When syringe 2.1 is extracted from the first rubber plug 5.1, the One rubber plug 5.1 can will puncture through the holes blocking to be formed by its elasticity, realize sealing.

Being equipped in the second operation port 4.2 being arranged in partition 3 can make to extract the second rubber plug 5.2 that needle 2 pierces through, and make syringe 2.1, which can pierce through the second rubber plug 5.2, extend into the second working chamber 1.2.Second is protruded into when syringe 2.1 pierces through the second rubber plug 5.2 When in working chamber 1.2, the second rubber plug 5.2 is covered on the outer wall of syringe 2.1 by its elastic tight, enables 2.1 axis of syringe To movement, while guaranteeing leakproofness.When syringe 2.1 is extracted from the second rubber plug 5.2, the second rubber plug 5.2, can by its elasticity It will puncture through the holes blocking to be formed, realize sealing.

The detection mouth 6 of first working chamber 1.1 setting is used to detect the detector 8 of test substance by piping connection.

The sample port 7 of second working chamber 1.2 setting is used to store the sample jar 9 of water sample by piping connection.

When carrying out test substance extraction, the water sample to be measured in sample jar 9 is sent in the second working chamber 1.2.

Syringe 2.1 pierces through the second rubber plug 5.2 and protrudes into the second working chamber 1.2, and needle core 2.2 stretches out syringe 2.1, and extend into In water sample in second working chamber 1.2.

Needle core 2.2 directly contacts water sample, adsorbs the test substance in water sample.

After the completion of needle core 2.2 adsorbs, water sample is discharged by the sewage draining exit 17 that the second working chamber 1.2 is arranged.

Needle core 2.2 is retracted into syringe 2.1, syringe 2.1 returns to the first working chamber 1.1, and the second rubber plug 5.2 passes through it Syringe 2.1 is pierced through the hole formed and sealed by elasticity.

Needle core 2.2 stretches out in the first working chamber 1.1, and the column carrier gas and parsing of chromatographic column are passed through to the first working chamber 1.1 Gas, and the first working chamber 1.1 is in the constant temperature condition of high temperature, so that the test substance adsorbed on needle core 2.2 is parsed, it is complete At the extraction of test substance, detected to be sent in detector 8.

In order to improve the efficiency that needle core 2.2 adsorbs test substance, sample port 7 includes the first sample port 7.1 and the second sample Mouth 7.2.

The height and position of first sample port 7.1 is lower than the second sample port 7.2.

Sample jar 9 is connected by the first sample cell with the first sample port 7.1, and delivery pump 10 is equipped on the first sample cell.

Second sample port 7.2 is connected by the second sample cell with sample jar 9.

Water sample in sample jar 9 is pumped into the second working chamber 1.2 by delivery pump 10, due to the height of the first sample port 7.1 Degree position is lower, and water sample is introduced into the bottom of the second working chamber 1.2, and then water level is gradually increasing.When water level rises to the second sample When product mouth 7.2, water sample is overflowed and is flow back into sample jar 9, is formed the flow circuit of water sample, and then realize the agitation of water sample, is increased Add the probability that test substance is contacted with needle core 2.2 in water sample, improves the efficiency that needle core 2.2 adsorbs, finally improve extraction efficiency.

In order to improve the efficiency of test substance parsing, detection mouth 6 includes the first inspection being connected with 1.1 one end of the first working chamber The second detection mouth 6.2 surveying mouth 6.1 and being connected with 1.1 other end of the first working chamber.

First detection mouth 6.1 is connected with the feeder 11 for transportation work gas, work gas by the first detection pipe Body is column carrier gas and the resolution gas of chromatographic column.

Second detection mouth 6.2 connects the detector 8 for detecting test substance by the second detection pipe.

Working gas is sent into one end of the first working chamber 1.1 by feeder 11 by the first detection mouth 6.1, makes the first work Make to be gradually filled with working gas in the end of chamber 1.1, then be flowed to the other end, until 1.1 other end of the first working chamber is full of work Make gas, to make the first working chamber 1.1 integrally full of working gas, finally by the first work of the second detection mouth 6.2 discharge Chamber 1.1 is sent to detector 8, forms the air-flow flowed from one end to the other end in the first working chamber 1.1.

The working gas air-flow of flowing quickly can contact constantly with needle core 2.2, parse and adsorb on needle core 2.2 Test substance accelerates resolution speed, improves detection efficiency.

Since the first working chamber 1.1 has a biggish dead volume, the working gas air-flow of formation only some and needle Core 2.2 contacts, and in order to further increase the effect that working gas is contacted with needle core, is equipped with bushing pipe 13 in the first working chamber 1.1, Seal 14 is filled between 1.1 inner wall of 13 outer wall of bushing pipe and the first working chamber.

Bushing pipe 13 is aligned with the first rubber plug 5.1 and the second rubber plug 5.2, so that syringe 2.1 is directed at bushing pipe 13, can be stretched when mobile Enter or pass through bushing pipe 13

Seal 14 divides the first working chamber 1.1 between the first detection mouth 6.1 and the second detection mouth 6.2 to pass through The first end chamber 1.1a and second end chamber 1.1b that bushing pipe 13 is connected.

The small volume of first end chamber 1.1a and second end chamber 1.1b, the working gas being sent by the first detection mouth 6.1 It can be rapidly filled with first end chamber 1.1a, then all by bushing pipe 13 by arriving second end chamber 1.1b, then sent out.

When needle core 2.2 stretches out syringe 2.1 in the first working chamber 1.1 and parsed, it is located in bushing pipe 13, makes whole work Gas can flow fast through bushing pipe 13, fully contact rapidly and with needle core 2.2, the under test gas in needle core 2.2 is parsed Come, further improve resolution speed, improves detection efficiency.

In order to improve accuracy when syringe 2.1 is pierced into the second working chamber 1.2,13 one end of bushing pipe is provided with closing in portion 13.1, closing in portion 13.1 is oppositely arranged with the second rubber plug 5.2.The internal diameter in closing in portion 13.1 is gradually reduced from inside to outside, Neng Gouyin The second rubber plug of end alignment 5.2 of guide pin cylinder 2.1 is accurate to be pierced into the second working chamber 1.2.

The structure in closing in portion can also increase the flow velocity of working gas simultaneously, improve resolution speed again.

In order to realize the automation of detection, extraction needle 2 is connected with driver 15, realizes the automatically controlled of the extraction movement of needle 2.

Driver 15 includes the first driver 15.1 being connected with needle core 2.2 and the second driver being connected with syringe 2.1 15.2, it is moved axially to respectively drive needle core 2.2 and syringe 2.1.

For the accuracy for guaranteeing needle core 2.2 and the movement of syringe 2.1, the first driver 15.1 and the second driver 15.2 are Driving motor, needle core 2.2 and syringe 2.1 by lead screw 16 respectively with 15.2 phase of the first driver 15.1 and the second driver Even.

First driver 15.1 drives the screw rod 16.1 of lead screw to rotate, and the nut 16.2 and needle core 2.2 on same lead screw are solid It connects.

Second driver 15.2 drives the screw rod 16.1 of lead screw to rotate, and the nut 16.2 and syringe 2.1 on same lead screw are solid It connects.

Driver 15 drives needle core 2.2 and syringe 2.1, can be improved needle core 2.2 and syringe 2.1 by the transmission of lead screw Mobile accuracy.

The first working chamber 1.1 is flowed into order to further avoid water sample, the first working chamber 1.1 and the second working chamber 1.2 are presented Lower setting, the second working chamber 1.2 are located at the lower section of the first working chamber 1.1, prevent water sample from passing through between the second rubber plug and syringe Gap leaks out, and moisture is avoided to guarantee the service life of equipment to the influence of equipment.

For the ease of better the second working chamber of inlet and outlet 1.2 of water sample, the sewage draining exit 17 of the second working chamber 1.2 setting It is connected with sewage pipe, dredge pump 18 is installed on sewage pipe.

Water sample is sent into before the second working chamber 1.2 again, and the second working chamber 1.2 can be evacuated to negative pressure by dredge pump 18, make water Sample can be quickly drawn into the second working chamber 1.2.

After the completion of water sample is adsorbed by needle core 2.2, dredge pump 18 can not only accelerate the discharge of water sample, while by the second work Make chamber 1.2 and be evacuated to negative pressure, the second working chamber 1.2 is emptied, there is no droplet adhesion on syringe 2.1 and needle core 2.2, avoids needle Moisture is brought into the first working chamber 1.1 by cylinder 2.1 and needle core 2.2, influences the service life of detector.

Claims (9)

1. a kind of continuous extraction apparatus, for extracting test substance from water sample to be measured, which is characterized in that including installation There is the cavity (1) of extraction needle (2)；

The cavity (1) is divided into the first working chamber (1.1) for accommodating test substance and to be measured for accommodating by separating (3) The second working chamber (1.2) of water sample；

The extraction needle (2) includes syringe (2.1) and needle core (2.2), and the needle core (2.2) is slidably mounted in syringe (2.1), Stretch out needle core (2.2) can or retract；

It is equipped with the first rubber plug (5.1) in the first operation port (4.1) of first working chamber (1.1) setting, the extraction needle (2) syringe (2.1) pierces through the first rubber plug (5.1) and extend into the first working chamber (1.1)；

Being equipped in the second operation port (4.2) being arranged on the partition (3) can make to extract the second rubber plug that needle (2) are pierced through (5.2), it is extend into the second working chamber (1.2) to make syringe (2.1) that the second rubber plug (5.2) can be pierced through；

The detection mouth (6) of first working chamber (1.1) setting is used to detect the detector of test substance by piping connection (8)；

The sample port (7) of second working chamber (1.2) setting is used to store the sample jar (9) of water sample by piping connection, uses So that water sample can be sent in the second working chamber (1.2).

2. continuous extraction apparatus according to claim 1, which is characterized in that the sample port (7) includes the first sample port (7.1) and the second sample port (7.2), the height and position of first sample port (7.1) are lower than the second sample port (7.2)；

The sample jar (9) is connected by the first sample cell with the first sample port (7.1), is equipped on first sample cell defeated Send pump (10)；

Second sample port (7.2) is connected by the second sample cell with sample jar (9).

3. continuous extraction apparatus according to claim 1, which is characterized in that the detection mouth (6) includes and first works The second detection mouth chamber (1.1) one end connected the first detection mouth (6.1) and be connected with the first working chamber (1.1) other end (6.2)；

First detection mouth (6.1) is connected with the feeder (11) for transportation work gas by the first detection pipe；

Second detection mouth (6.2) connects the detector (8) for detecting test substance by the second detection pipe.

4. continuous extraction apparatus according to claim 2, which is characterized in that be equipped in first working chamber (1.1) The bushing pipe (13) that syringe can be made to pass through is filled with seal between bushing pipe (13) outer wall and the first working chamber (1.1) inner wall (14)；

The seal (14) is between the first detection mouth (6.1) and the second detection mouth (6.2), to by the first working chamber (1.1) it is divided into the first end chamber (1.1a) and second end chamber (1.1b) being connected by bushing pipe (13).

5. continuous extraction apparatus according to claim 4, which is characterized in that described bushing pipe (13) one end is provided with closing in portion (13.1), the internal diameter of the closing in portion (13.1) is gradually reduced from inside to outside, the closing in portion (13.1) and the second rubber plug (5.2) It is oppositely arranged.

6. continuous extraction apparatus according to claim 1, which is characterized in that the extraction needle (2) is connected with driver (15),

The driver (15) includes the first driver (15.1) being connected with needle core (2.2) and be connected with syringe (2.1) Two drivers (15.2), to respectively drive needle core (2.2) and syringe (2.1) axial movement.

7. continuous extraction apparatus according to claim 1, which is characterized in that the first driver (15.1) and the second driver (15.2) be driving motor, needle core (2.2) and syringe (2.1) by lead screw (16) respectively with the first driver (15.1) and Second driver (15.2) is connected；

First driver (15.1) drives screw rod (16.1) rotation of lead screw, nut (16.2) and needle core on same lead screw (2.2) affixed；

Second driver (15.2) drives screw rod (16.1) rotation of lead screw, nut (16.2) and syringe on same lead screw (2.1) affixed.

8. continuous extraction apparatus according to claim 1, which is characterized in that second working chamber (1.2) is located at first The lower section of working chamber (1.1).

9. continuous extraction apparatus according to claim 1, which is characterized in that the row of the second working chamber (1.2) setting Dirty mouth (17) is connected with sewage pipe, and dredge pump (18) are equipped on the sewage pipe.