CN106492550A - Chemical detection system - Google Patents

Abstract

The invention relates to a chemical detection system, which includes a detector, a reagent storage device, a liquid suction pipe, a waste liquid collection device and a waste liquid pipe. The reagent storage device includes a bottle body, a first cover body and a control valve. Connected to the opening of the bottle body, the first filter is arranged on the first body, the control valve is arranged on the first body, and is located on the path where the first filter communicates with the opening of the bottle body, and is used to open when compensating the air pressure in the bottle body; The second cover includes a second body and a second filter, the second body is sealingly fitted to the opening of the waste liquid barrel, and the second filter is arranged on the second body; the control valve is opened when the air pressure inside the bottle is compensated , so that the outside air enters the bottle body, which improves the smoothness of the solvent delivery in the bottle body. In addition, by sealingly fitting the second body of the second cover of the waste liquid collection device to the waste liquid bucket, and setting a second filter on the second body, the organic volatile harmful gases in the waste liquid bucket are eliminated. filtered out.

Description

Chemical Detection System

technical field

The invention relates to the technical field of chemical experiment equipment, in particular to a chemical detection system.

Background technique

With the continuous innovation and development of science and technology, more and more laboratories are used for chemical technology research and development experiments. Usually, when conducting a chemical experiment, it is necessary to extract the reagent from the reagent bottle to the detector, and after the detection and experiment, the waste liquid output by the detector is discharged into the waste liquid bucket. At present, the method of adding chemical reagents in chemical experiments is mainly to use a suction pipe to pump reagents for addition. During the operation, the extracted organic solvent is usually a liquid with high concentration and strong volatility. During the extraction process, the organic solvent volatilizes harmful gas from the reagent bottle and releases it into the air, which affects the physical and mental health of the experimenters. In addition, there are also volatile organic solvents in the waste liquid barrel, which are easy to volatilize from the waste liquid barrel, posing a threat to the physical and mental health of the experimenters.

In order to solve this problem, most chemical laboratories are also equipped with auxiliary equipment such as air conditioners or air purification equipment to remove indoor harmful gases. However, this "pollution first, then treatment" treatment method cannot remove or exclude the air with harmful gases in time, and still has an adverse effect on the physical and mental health of the experimenters.

Contents of the invention

Based on this, it is necessary to provide a chemical detection system that prevents the release of organic volatile substances into the air in view of the traditional chemical detection system that easily releases organic harmful gases into the laboratory indoor air and affects the physical and mental health of the experimenters. .

A chemical detection system comprising:

Detector;

The reagent storage device includes a bottle body, a first cover body and a control valve, the first cover body includes a first body and a first filter, the first body is sealingly fitted to the opening of the bottle body, the The first filter is arranged on the first body for filtering the gas entering the bottle, the control valve is arranged on the first body and is located at the opening of the first filter and the bottle On the connected path, it is used to open when compensating the air pressure inside the bottle;

One end of the suction tube is connected to the liquid inlet of the detector, and the other end is sealed and pierced through the first body, and extends into the bottle to suck the reagent in the bottle;

The waste liquid collection device includes a waste liquid barrel and a second cover, the second cover includes a second body and a second filter, the second body is sealingly fitted to the opening of the waste liquid barrel, the a second filter is arranged on the second body, and is used to filter the gas discharged from the waste liquid bucket;

One end of the waste liquid tube is connected to the liquid discharge port of the detector, and the other end is sealingly fitted to the second cover to discharge the waste liquid into the waste liquid bucket.

The above-mentioned chemical detection system, by setting the control valve, opens when the air pressure in the bottle is compensated, so that the outside air enters the bottle, ensures the stable air pressure in the bottle, and improves the smoothness of the solvent delivery in the bottle. And the harmful organic substances in the bottle body 1 cannot be discharged from the bottle body, which ensures the physical and mental health of the experimenters. By setting the first filter, the airflow is first filtered and then enters the bottle body through the control valve, so as to avoid contamination in the bottle body. Reagents are contaminated. In addition, by sealingly fitting the second body of the second cover of the waste liquid collection device to the waste liquid barrel, and setting a second filter on the second body, the organic volatile harmful gases in the waste liquid barrel are eliminated. Filtration and discharge further ensure the physical and mental health of the experimenters, and improve the safety and reliability of chemical experiment waste liquid treatment.

In one of the embodiments, the first filter includes a first connection part, a first filter part connected to one end of the first connection part, and a first filter membrane, and the other end of the first connection part is sealed. Connected to the first body, the first filter part has a cavity, the first filter membrane is arranged in the cavity, and the first filter also includes a A filter part is used to communicate with the opening of the bottle body and the air hole of the cavity, the end of the air hole communicating with the cavity is provided with the control valve, and the control valve is a one-way valve for Open when compensating the air pressure inside the reagent bottle.

In one embodiment, the control valve is flexible and includes a distal end, a proximal end and an air inlet channel extending between them, the distal end is located in the cavity, and the proximal end is located in the The air hole is configured to have a slit that is opened or closed in response to the negative pressure inside the bottle.

In one of the embodiments, the proximal end of the control valve includes two wings extending along the vent hole, the two wings are oppositely arranged, and are configured to be normally closed, and respond to negative feedback in the reagent bottle. The gap is formed when pressed.

In one embodiment, the first cover further includes an infusion tube joint for connecting the suction tube, the first body is provided with a connecting hole communicating with the opening of the bottle body, and the infusion tube joint Screwed to the connection hole, the end of the infusion tube joint located in the connection hole has a substantially conical contraction surface along the circumference, and the inner wall of the connection hole has a mating surface in contact with the contraction surface, so The shape of the matching surface matches the shape of the shrinking surface.

In one of the embodiments, the second filter includes a second connection part, a second filter part connected to one end of the second connection part, the second connection part is sealingly fitted to the second body, And it has an air inlet connected to the opening of the waste liquid barrel, the second filter part has an accommodating cavity equipped with a filter element, and the accommodating cavity includes a first open end and a second opening opposite to each other end, the first open end communicates with the air intake hole.

In one embodiment, the second filter further includes a filter membrane, and the filter membrane is disposed at the second open end of the accommodating cavity.

In one embodiment, the filter element is activated carbon particles or a sintered carbon rod matching the shape of the accommodating cavity.

In one embodiment, the radial dimension of the accommodating cavity gradually increases from the first opening end to the second opening end.

In one of the embodiments, it is characterized in that the chemical detection system further includes a liquid level sensor and an alarm device, and the liquid level sensor is arranged in the waste liquid bucket and connected with the alarm device to When the waste liquid in the waste liquid barrel reaches the preset value, an alarm signal is sent.

Description of drawings

Fig. 1 is a schematic structural diagram of a chemical detection system in an embodiment of the present invention;

2 is a schematic structural view of the first cover of the reagent storage device of the chemical detection system shown in FIG. 1;

Fig. 3 is a sectional view of the first cover shown in Fig. 2;

Fig. 4 is a partial enlarged view at A of the first cover body shown in Fig. 3;

FIG. 5 is a schematic structural view of the second cover of the waste liquid collection device of the chemical detection system shown in FIG. 1;

Fig. 6 is a partially enlarged view of the position B of the second cover shown in Fig. 5 .

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in FIG. 1 , FIG. 2 and FIG. 5 , a chemical detection system 10 in an embodiment of the present invention includes a detector 12 , a reagent storage device 14 , a suction tube 16 , a waste liquid collection device 18 and a waste liquid tube 19 .

The reagent storage device 14 includes a bottle body 142 , a first cover body 144 and a control valve 146 (see FIG. 3 ). The first cover 144 includes a first body 1440 and a first filter 1444. The first body 1440 is sealingly fitted to the opening of the bottle body 142. The first filter 1444 is arranged on the first body 1440 for filtering the The gas in the bottle body 142 . The control valve 146 is disposed on the first body 1440 and is located on the path where the first filter 1444 communicates with the opening of the bottle body 142 , and is opened when compensating the air pressure in the bottle body 142 . One end of the liquid suction tube 16 is connected to the liquid inlet of the detector 12 , and the other end is sealed and pierced through the first body 1440 , and extends into the bottle body 142 to suck the reagent in the bottle body 142 .

The waste liquid collection device 18 includes a waste liquid bucket 182 and a second cover 184, the second cover 184 includes a second body 1842 and a second filter 1844, and the second body 1842 is sealingly connected to the waste liquid bucket 182. Opening, the second filter 1844 is disposed on the second body 1842 for filtering the gas discharged from the waste liquid barrel 182 . One end of the waste liquid tube 19 is connected to the liquid discharge port of the detector 12 , and the other end is sealingly fitted to the second cover 184 to discharge the waste liquid into the waste liquid barrel 182 .

Wherein, the first cover 144 and the opening of the bottle body 142 are sealed and matched, and a negative pressure is generated in the bottle body 142 during the process of aspirating the reagent by the liquid suction tube 16 . By setting the control valve 146, it is opened when the air pressure in the bottle body 142 is compensated to allow outside air to enter the bottle body 142, to ensure the stability of the air pressure in the bottle body 142, and to improve the smoothness of the solvent delivery in the bottle body 142. And the harmful organic substances in the bottle body 142 cannot be discharged from the bottle body 142, which ensures the physical and mental health of the experimenters. By setting the first filter 1444, the air flow is first filtered, and then enters the bottle body 142 through the control valve 146 , to prevent the reagents in the bottle body 142 from being polluted.

In addition, by sealingly fitting the second body 1842 of the second cover 184 of the waste liquid collecting device 18 to the waste liquid barrel 182, and setting a second filter 1844 on the second body 1842, the waste liquid in the waste liquid barrel 182 Organic and volatile harmful gases are filtered and discharged, which further ensures the physical and mental health of experimenters and improves the safety and reliability of chemical experiment waste liquid treatment.

It should be pointed out that in the process of aspirating the reagent by the suction pipe 16, a negative pressure is generated in the bottle body 142, which means that the pressure in the bottle body 142 is less than the pressure of the solvent gas-liquid equilibrium in the bottle body 142, so that the bottle body The reagent in 142 can't be smooth, even can't be exported from bottle body 142. When the control valve 149 is opened, the pressure in the bottle body 142 is compensated, so that the reagent can be output smoothly.

In this embodiment, the chemical detection system 10 includes two detectors 12, each detector 12 is equipped with two reagent storage devices 14, and the two detectors 12 are discharged into the waste liquid barrel 182 through the waste liquid pipe 19, Of course, in some other embodiments, the number of detectors 12 and the number of reagent storage devices 14 can be determined according to actual conditions, which are not limited here.

Please refer to FIG. 2 and FIG. 3 , in this embodiment, the first body 1440 is sealingly fitted to the opening of the bottle body 142 , the first filter 1444 includes a first connecting portion 1441 , a filter connected to one end of the first connecting portion 1441 The first filter part 1443 and the first filter membrane 1445 . The other end of the first connection portion 1441 is sealingly matched with the first body 1440 , the first filter portion 1443 has a cavity 1446 , and the first filter membrane 1445 is disposed in the cavity 1446 . The first filter 1444 also includes a vent hole 1448 that passes through the first connecting portion 1441 and the first filter portion 1443 and is used to communicate with the opening of the bottle body 142 and the cavity 1446. One end of the vent hole 1448 communicating with the cavity 1446 is also provided with a The aforementioned control valve 146 . The first cover 144 also includes an infusion tube joint 1447 for connecting the suction tube 16. The first body 1440 is also provided with a first connection hole 1442 connected to the opening of the bottle body 142. The infusion tube joint 1447 is screwed to the second A connection hole 1442 . In the chemical experiment, the liquid suction tube 16 is passed through the infusion tube joint 1447 and extends into the bottle body 142 to suck the reagent in the bottle body 142 .

Specifically, in one embodiment, the control valve 146 includes an open state and a locked state. When the air pressure in the bottle body 142 is lower than a preset air pressure value, the control valve 146 is in an open state for compensating the air pressure in the bottle body 142 . When the air pressure in the bottle body 142 is greater than or equal to the preset air pressure value, the control valve 146 is in a locked state. That is to say, when the air pressure value in the bottle body 142 reaches the above-mentioned conditions during the reagent suction process, the control valve 146 is opened; when the reagent suction is stopped, the air pressure value is greater than or equal to the aforementioned preset air pressure value, and the control valve 146 is locked. .

Wherein, the first filter membrane 1445 is arranged in the cavity 1446, so that the air flow is filtered first, and then enters the bottle body 142 through the control valve 146, so as to prevent the reagents in the bottle body 142 from being polluted. Specifically, the first filter membrane 1445 is a microporous first filter membrane 1445, which is used to prevent small-sized dust and moisture in the air from entering the bottle, and maintain the purity of the reagent in the bottle body 142 unchanged.

Preferably, please refer to Fig. 4 together, this control valve 146 is made of flexible material, such as rubber or synthetic elastic material or combination thereof, this control valve 146 comprises distal end 1462, proximal end 1464 and extending between the two. The air inlet channel 1466 , the distal end 1462 is located in the cavity 1446 of the first filter part 1443 , and the proximal end 1464 is located in the air hole 1448 , and is configured to have a gap that can be opened or closed in response to the negative pressure in the bottle body 142 .

In this embodiment, the proximal end 1464 of the control valve 146 includes two wings 1468 extending along the air hole 1448, the two wings 1468 are oppositely arranged, and are configured to be normally closed, and respond to negative pressure in the bottle body 142 When the gap is formed. That is to say, when the negative pressure is generated in the bottle body 142, the two wings 1468 are stretched apart under the action of the external atmospheric pressure, thereby forming a gap through which air can flow. Specifically, in one embodiment, the wings 1468 are in the shape of a duckbill, that is, in a sheet-like structure similar to a duckbill.

Wherein, the distal end 1462 of the control valve 146 extends along the edge of the vent hole 1448 in a direction away from the axis of the vent hole 1448 to provide support for the control valve 146 . That is to say, the distal end 1462 of the control valve 146 forms a flange, so that the control valve 146 is limited in the axial direction of the vent hole 1448 . It should be understood that the radial dimension of the control valve 146 is slightly larger than the inner diameter of the vent hole 1448. Since the control valve 146 is made of a flexible material, when the control valve 146 is installed in the vent hole 1448, its outer wall is tightly against the The inner wall of the vent hole 1448, so as to achieve a good seal.

In this embodiment, the cavity 1446 of the first filter part 1443 is in the shape of an inverted cone, and the first filter membrane 1445 is covered in the cavity 1446, so that the outside air first passes through the first filter membrane 1445, and then enters the cavity. The chamber 1446 enters the bottle body 142 through the control valve 146. Due to the negative pressure generated in the bottle body 142 during the suction process, the air flow flows into the cavity 1446. In order to ensure the stability of the air pressure in the bottle body 142, the air flow allowed by the control valve 146 is not too large. The cavity 1446 is in the shape of an inverted cone, which can accommodate a certain volume of airflow, which can act as a buffer, and maintain a certain difference between the air pressure in the cavity 1446 and the outside air pressure, so as to ensure that the airflow entering the bottle body 142 is uniform and the flow rate is high. controllable.

Further, in order to ensure that the airflow entering the first filter 1444 is not too large, and to prevent pollutants with larger diameters or larger particles from entering the first filter 1444, so that the first filter membrane 1445 can play a good filtering role, The first filter 1444 also includes a first casing 1455, the first casing 1455 is installed on the first filter part 1443, and is located on one side of the first filter membrane 1445, and has a first ventilation hole for air intake 1456. Specifically in this embodiment, a first vent hole 1456 is opened at the center of the first casing 1455, of course, in other embodiments, the number, position and diameter of the first vent hole 1456 can be determined according to the actual situation. Depends, it is not limited here.

In this embodiment, the first body 1440 includes a first cap 1449 and a first upper cover 1450, the opening of the first cap 1449 is also provided with a first matching protrusion 1451 along the circumference, and the first upper cover 1450 is First annular grooves (not shown) are provided at intervals in the circumferential direction, and the first matching protrusions 1451 are inserted into the first annular grooves to connect the first cover body 144 and the first cap 1449 as a whole. In this way, the first cover 144 is matched with the first cap 1449 through the cooperation of the first matching protrusion 1451 and the first annular groove.

Wherein, the first cap 1449 is sealingly fitted at the opening of the bottle body 142, the first cap 1449 and the first upper cover 1450 are elastic, and the radial dimension of the opening of the bottle body 142 is slightly smaller than that of the first cap 1449. The radial dimension of the outer profile enables the first cap 1449 to be fitted to the opening of the bottle body 142 stably and with good sealing performance. The first cap 1449 is a shell-like structure with two ends open, the first upper cap 1450 is detachably and hermetically fitted to the upper opening of the first cap 1449 , and the lower end opening of the first cap 1449 is located in the bottle body 142 .

Specifically, the first cover 144 is formed with a first step (not shown), the first annular groove is provided on the vertical step surface of the first step, and the first matching protrusion 1451 is embedded in the first annular groove. When the groove is formed, the horizontal stepped surface of the first stepped portion abuts against the lower surface of the first matching protrusion 1451 . In this way, the volatilized organic gas needs to pass between the lower surface of the first matching protrusion 1451 and the horizontal step surface of the first stepped part, between the end surface of the first matching protrusion 1451 and the side wall of the first annular groove, and the first The upper surface of the matching protrusion 1451 is discharged between the upper wall of the first annular groove. Due to the tight fit between the above three sets of mating surfaces, the tightness between the first cap 1449 and the first upper cover 1450 is ensured.

Further, in order to ensure the tightness between the first upper cover 1450 and the first cap 1449, the first cover 144 also includes a first sealing ring 1453, and the first upper cover 1450 is provided with a second annular groove 1454 along its circumference , the second annular groove 1454 is spaced apart from the first annular groove, and is located close to one end of the first cover 144 protruding into the opening of the bottle body 142 . The first sealing ring 1453 is disposed in the second annular groove 1454 and abuts against the sidewall of the inner cavity of the first cap 1449 to further achieve sealing.

It should be understood that the first upper cover 1450 and the first cap 1449 are elastic and are injection molded from polymer materials. When the first cap 1449 is squeezed by the inner wall of the liquid inlet hole, the first sealing ring 1453 is pressed against the inner wall of the liquid inlet hole. The inner cavity of the first cap 1449 ensures good sealing.

It can be understood that, in this embodiment, the first upper cover 1450 and the first cap 1449 are detachably sealed and fitted, and in some other embodiments, the first upper cover 1450 and the first cap 1449 can also be integrally formed. , is not limited here.

In this embodiment, the first connection hole 1442 is opened in the first upper cover 1450, and the first upper cover 1450 is also provided with a first installation hole (not shown) passing through it, and the first installation hole is connected to the first connection The holes 1442 are all connected to the opening of the bottle body 142 , the first installation hole is used to match with the first connection portion 1441 of the first filter 1444 , and the first connection hole 1442 is used to match with the infusion tube joint 1447 . Specifically, the first connecting portion 1441 is cylindrical, the radial dimension of the first mounting hole is larger than the radial dimension of the connecting hole for installing the infusion tube joint 1447, and part of it is provided with internal threads. The portion 1441 is screwed into the first mounting hole.

Wherein, the first connecting hole 1442 is partially provided with internal threads, and the infusion tube joint 1447 is screwed into the first connecting hole 1442 . The end of the infusion tube joint 1447 located at the first connecting hole 1442 has a substantially conical contracting surface along the circumferential direction, and the inner wall of the connecting hole has a mating surface (not marked) in contact with the contracting surface. The shape of the mating surface is consistent with The shape of the shrinking surface matches. In this way, when the infusion tube joint 1447 is tightened in the connection hole, the conical shrinkage surface of the infusion tube joint 1447 is tightened by the mating surface, so that the suction tube 16 passing through the infusion tube joint 1447 is tightened, thereby preventing suction. The connection between the liquid tube 16 and the infusion tube joint 1447 leaks air.

It should be pointed out that, in this embodiment, the infusion tube connector 1447 includes one, and in some other embodiments, there may be multiple infusion tube connectors 1447, which is not limited here.

Please refer to FIG. 5 and FIG. 6 , in this embodiment, the second cover 184 includes a second body 1842 and a second filter 1844 , and the second body 1842 is sealingly fitted to the opening of the waste liquid barrel 182 . The second filter 1844 includes a second connection part 1841, a second filter part 1842 and a second housing 1843. The second connection part 1841 is sealingly fitted to the second body 1842 and communicated with the opening of the waste liquid bucket 182. The air intake hole 1845, the second filter part 1842 has an accommodating cavity (not shown) in which a filter element 1846 is installed. The accommodating cavity includes a first open end and a second open end opposite to each other. The first open end communicates with the air inlet 1845. The second cover 1843 is set on the second open end, and is provided with and accommodated A plurality of second ventilation holes 1848 connected to the cavity, the air intake hole 1845 , the accommodating cavity and the second ventilation holes 1848 form an airflow channel.

The second cover 184 also includes a waste liquid delivery pipe joint 1847, which is tightly fitted to the second body 1842 and communicated with the opening of the waste liquid barrel 182 to inject the waste liquid into the waste liquid barrel 182. waste liquid. In this way, during or after the experiment, the volatile organic matter in the waste liquid bucket 182 enters the second filter part 1842 through the air inlet 1845 of the second connection part 1841, is filtered by the filter element 1846, and is discharged from the second casing. The second vent hole 1848 of 1843 is discharged. Due to the filtering effect of the second filter part 1842, and after passing through the airflow channel formed by the air inlet 1845, the accommodating cavity, and the second air hole 1848, the volatile organic matter is basically deposited in the second cover 184, and the Clean air is discharged to ensure the physical and mental health of the experimenters.

It should be understood that the exhaust hole communicates with the waste liquid cavity of the waste liquid barrel 182 for containing the experimental waste liquid through the air inlet hole 1845 and the accommodating cavity, so that the waste liquid cavity of the waste liquid barrel 182 is the same as the external air pressure, Furthermore, the experimental waste liquid can be input into the waste liquid cavity from the waste liquid delivery pipe joint 1847 .

Preferably, the second body 1842 includes a second cap 1849 and a second upper cover 1850, the top of the waste liquid barrel 182 is provided with a liquid inlet hole, the second cap 1849 is sealingly fitted in the liquid inlet hole, and the second upper cover 1850 The second upper cover 1850 defines a second mounting hole (not shown in the figure) passing through it, and the second connecting portion 1841 is screwed into the second mounting hole. The waste liquid delivery pipe joint 1847 is tightly fitted to the second upper cover 1850 and communicates with the liquid inlet hole of the waste liquid barrel 182 .

In this embodiment, both the second cap 1849 and the second upper cover 1850 have elasticity, and the radial dimension of the liquid inlet hole is slightly smaller than the radial dimension of the outer profile of the second cap 1849, so that the second cap 1849 can be stabilized and It has good sealing performance and is connected to the liquid inlet hole. The second cap 1849 is a shell-like structure with two ends open. The second upper cover 1850 is detachably and sealingly fitted to the upper opening of the second cap 1849. The lower end opening of the second cap 1849 is located at the waste liquid bucket 182. Inside. The peripheral edge of the upper opening of the second cap 1849 extends inwardly toward the center of the opening along the circumferential direction to form a second matching protrusion 1851, and the second upper cover 1850 is correspondingly provided with a third annular groove (not shown in the figure) along its circumferential direction. The second matching protrusion 1851 is inserted into the third annular groove to connect the second upper cover 1850 and the second cap 1849 as a whole.

Specifically, the second upper cover 1850 is formed with a second stepped portion (not shown in the figure), the third annular groove is provided on the vertical stepped surface of the second stepped portion, and the second matching protrusion 1851 is embedded in the third annular groove. When the groove is formed, the horizontal stepped surface of the stepped portion abuts against the lower surface of the second matching protrusion 1851 . In this way, the experimental waste liquid or volatile organic gas needs to pass between the lower surface of the second matching protrusion 1851 and the horizontal step surface of the step part, between the end surface of the second matching protrusion 1851 and the side wall of the third annular groove, and There is discharge between the upper surface of the second matching protrusion 1851 and the upper wall of the third annular groove. Due to the close fit between the above three sets of mating surfaces, the tightness between the second cap 1849 and the second upper cover 1850 is ensured.

Further, please refer to FIG. 6, in order to ensure the sealing between the second upper cover 1850 and the second cap 1849, the second upper cover 1850 also includes a second sealing ring 1854, and the second cover 184 is provided with The fourth annular groove 1853 is spaced apart from the third annular groove and is located close to one end of the second upper cover 1850 protruding into the waste liquid barrel 182 . The second sealing ring 1854 is disposed in the fourth annular groove 1853 and abuts against the sidewall of the inner cavity of the waste liquid barrel 182 to further achieve sealing.

It should be understood that the second upper cover 1850 and the second cap 1849 are elastic and are injection molded from polymer materials. When the second cap 1849 is pressed by the inner wall of the liquid inlet hole, the second sealing ring 1854 is pressed against the inner wall of the liquid inlet hole. The inner cavity of the second cap 1849 ensures good sealing.

It can be understood that, in this embodiment, the second upper cover 1850 and the second cap 1849 are detachably sealed and fitted, and in some other embodiments, the second upper cover 1850 and the second cap 1849 can also be integrally formed. , is not limited here.

In this embodiment, the second upper cover 1850 is also provided with a second connection hole 1857 for installing the waste liquid delivery pipe joint 1847. The second connection hole 1857 communicates with the inner cavity of the waste liquid barrel 182, and partly has an inner cavity. The waste liquid delivery pipe joint 1847 is screwed into the second connection hole 1857 . Specifically, the waste liquid delivery pipe joint 1847 includes two types, which are respectively connected to a waste liquid delivery pipe with an outer diameter of 2.8-3.2 mm, and connected to a waste liquid delivery pipe with an outer diameter of 6.4-9 mm. The number of pipe joints 1847 is 1 to 3. Certainly, in some other embodiments, the types of the waste liquid delivery pipe connector 1847 may also include multiple types, and the number may also be determined according to actual conditions, which is not limited here.

In this embodiment, the second connecting portion 1841 is cylindrical, and the center of the second upper cover 1850 is provided with a second mounting hole (not shown) penetrating through the second cover 184. The diameter of the second mounting hole is The second connecting hole 1857 is larger in size than the second connecting hole 1857 for installing the waste liquid delivery pipe joint 1847 and is partially provided with internal threads. The second connecting portion 1841 is screwed into the second connecting hole 1857 . Further, the second cover 184 also includes a third sealing ring 1855, the second connecting portion 1841 is provided with a fifth annular groove (not shown in the figure) along its circumference, and the third sealing ring 1855 is embedded in the fifth annular groove , and abut against the inner wall of the second mounting hole that is not provided with internal threads, so as to play a sealing role.

Wherein, the radial dimension of the accommodating cavity gradually increases from the first opening end to the second opening end. In this embodiment, the accommodating cavity is roughly in the shape of an inverted cone. In this way, after the airflow enters the accommodating cavity from the air inlet 1845, it can flow through without any dead angle, so that the airflow can fully contact the filter element 1846 to play a role in filtering. effect. Specifically, the filter element 1846 is activated carbon particles, which are filled in an inverted cone-shaped accommodating cavity. Of course, in some other embodiments, the filter element 1846 can also be a sintered carbon rod, which is not limited here, but the sintered The shape of the carbon rod needs to match the housing cavity so that the airflow can fully contact the filter element 1846 .

It should be understood that the accommodating cavity is generally in the shape of an inverted cone, and the second opening end of the accommodating cavity is larger than the opening of the first switch end, and is open from the first opening end to the second opening end. The gentle transition makes the filter element 1846, that is, filled with activated carbon particles, and after the airflow enters the accommodation cavity from the air inlet 1845, it can gradually fill the accommodation cavity along the opening direction of the accommodation cavity, without dead angle, and can fully communicate with Filter element 1846 contacts.

Preferably, the second filter 1844 further includes a second filter membrane 1856, and the second filter membrane 1856 is disposed at the second opening end of the accommodating cavity. In this embodiment, the second filter membrane 1856 is a dense fiber filter membrane, which is covered at the second opening end of the accommodating cavity, which not only prevents the activated carbon particles used as the filter element 1846 from overflowing from the accommodating cavity, but also plays a role The role of secondary filtration further avoids the volatilization of organic substances. The second casing 1843 is clamped on the top of the second filter part 1842 , and has a plurality of second ventilation holes 1848 evenly distributed therein, so that the gas in the waste liquid bucket 182 can be volatilized.

In this embodiment, the chemical detection system 10 also includes a liquid level sensor and an alarm device (not shown), the liquid level sensor is arranged in the waste liquid bucket 182, and is connected with the alarm device, so that the liquid level sensor in the waste liquid bucket 182 An alarm signal is issued when the waste liquid reaches the preset value. Specifically, the alarm device may be an audible and visual alarm device.

In the above-mentioned chemical detection system 10 , the first cover 144 is tightly fitted with the opening of the bottle body 142 , and a negative pressure is generated in the bottle body 142 during the process of aspirating the reagent by the liquid suction tube 16 . By setting the control valve 146, it is opened when the air pressure in the bottle body 142 is compensated to allow outside air to enter the bottle body 142, to ensure the stability of the air pressure in the bottle body 142, and to improve the smoothness of the solvent delivery in the bottle body 142. And the harmful organic substances in the bottle body 142 cannot be discharged from the bottle body 142, which ensures the physical and mental health of the experimenters. By setting the first filter 1444, the air flow is first filtered, and then enters the bottle body 142 through the control valve 146 , to prevent the reagents in the bottle body 142 from being polluted.

In addition, by sealingly fitting the second body 1842 to the waste liquid barrel 182, and setting the second filter 1844 on the second body 1842, the organic volatile harmful gas in the waste liquid barrel 182 is filtered and discharged, further The physical and mental health of the experimenters is guaranteed, and the safety and reliability of chemical experiment waste liquid treatment are improved.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of chemical detection system, it is characterised in that include：

Detector；

Reagent storage means, including bottle, the first lid and control valve, first lid includes that the first noumenon and first is filtered Device, the first noumenon sealing are coupled to the opening of the bottle, and first filter is arranged at the first noumenon, is used for The gas for entering the bottle is filtered, the control valve is arranged at the first noumenon, and is located at first filter and institute On the path of the open communication for stating bottle, open during air pressure in the bottle for compensating；

Liquid suction pipe, one end are connected to the inlet of the detector, and other end sealing is arranged in the first noumenon, and stretches into institute State bottle to aspirate the reagent in the bottle；

Waste collecting device, including waste liquid barrel and the second lid, second lid includes the second body and the second filter, institute The opening that the sealing of the second body is coupled to the waste liquid barrel is stated, second filter is arranged at second body, was used for Filter the gas that discharges from the waste liquid barrel；

Sewer pipe, one end are connected to the leakage fluid dram of the detector, and other end sealing is coupled to second lid with by waste liquid Enter the waste liquid barrel.

2. chemical detection system according to claim 1, it is characterised in that first filter includes the first connection Portion, the first filter house and the first filter membrane that are connected to described first connecting portion one end, the other end of the first connecting portion are close Envelope is coupled to the first noumenon, and there is first filter house cavity, first filter membrane to be arranged at the cavity, institute Stating the first filter also includes first connecting portion described in insertion and first filter house, for connecting the bottle opening and institute The passage of cavity is stated, the passage connects one end of the cavity and is provided with the control valve, and the valve that controls is check valve, Open during air pressure in the reagent bottle for compensating.

3. chemical detection system according to claim 2, it is characterised in that the control valve has flexibility, and includes far End, near-end and the inlet channel for extending therebetween, the distal end are located at the cavity, described are proximally located at the ventilation Hole, and the gap for being configured to be turned on and off with negative pressure in the bottle is responded.

4. chemical detection system according to claim 3, it is characterised in that the near-end of the control valve includes two along logical The alar part that pore extends, two alar parts are oppositely arranged, and be configured to normally closed, and when negative pressure in the reagent bottle is responded Form the gap.

5. chemical detection system according to claim 1, it is characterised in that first lid is also included for connecting The transfusion tube joint of liquid suction pipe is stated, the first noumenon offers the connecting hole for connecting the bottle opening, and the woven hose connects Head thread is connected to the connecting hole, and it is substantially in circular cone that the transfusion tube joint be located at the end of the connecting hole circumferentially to have The contraction front of shape, the connecting hole inwall have the mating surface contacted with the contraction front, the shape of the mating surface and institute State the mating shapes of contraction front.

6. chemical detection system according to claim 1, it is characterised in that second filter includes the second connection Portion, the second filter house for being connected to described second connecting portion one end, the second connecting portion sealing are coupled to second body, And with the air admission hole with the open communication of the waste liquid barrel, second filter house has the accommodating cavity for being equiped with filter core, The accommodating cavity includes that the first relative openend and the second openend, first openend are connected with the air admission hole.

7. chemical detection system according to claim 6, it is characterised in that second filter also includes filter membrane, The filter membrane is arranged at second openend of the accommodating cavity.

8. chemical detection system according to claim 6, it is characterised in that the filter core be activated carbon granule or with described The sintering carbon-point that accommodating cavity geometry matches.

9. chemical detection system according to claim 6, it is characterised in that the radial dimension of the accommodating cavity is from described First openend gradually increases to second openend.

10. the chemical detection system according to claim 1～9 any one, it is characterised in that the chemical detection system Also include that liquid level sensor and warning device, the liquid level sensor are arranged in the waste liquid barrel, and with the warning device Connection, sends alarm signal when reaching preset value with the waste liquid in the waste liquid barrel.