Waste liquid collection sealing bottle cap for integrated liquid chromatograph

Abstract

The utility model provides a waste liquid collection sealing bottle cap for an integrated liquid chromatograph. The waste liquid collection sealing bottle cap comprises a bottle cap body, a guide pipe connector, a filter, a liquid level floater and a liquid level alarm. The guide pipe connector and the filter are installed on the top of the bottle cap body in a threaded mode, the upper end of the liquid level floater can slide up and down to be arranged in a lower end pipe opening of the filter in a limited mode, and the top end of the liquid level floater is opposite to a contact of a liquid level alarm fixedly installed on the wall body of the lower portion of the filter. According to the utility model, the filter, the liquid level floater and the liquid level alarm are integrated into a whole, so that excessive holes are prevented from being formed in the bottle cap, gaps of waste gas leakage are reduced, the structural arrangement is simpler, the installation and the maintenance are convenient, the structural design is simple and novel, and the practicability is good.

Description

Technical Field

[0001] The utility model relates to a solvent safety bottle cap, in particular to a waste liquid collecting and sealing bottle cap for an integrated liquid chromatograph. Background Art

[0002] Liquid chromatographs are composed of high-pressure infusion pumps, injection systems, temperature control systems, chromatographic columns, detectors, signal recording systems, etc., depending on whether the stationary phase is liquid or solid. Compared with classic liquid column chromatography devices, it has the characteristics of high efficiency, rapidity, and sensitivity. When liquid chromatographs are performing separation work, there are many mobile phases involved, such as aqueous phase: formic acid, acetic acid, perchloric acid, etc., organic phase: methanol, acetonitrile, dichloromethane, DMF, etc. The main waste liquid collected by chromatography is the waste liquid generated after the mobile phase and liquid sample are adsorbed and separated in the chromatographic column.

[0003] If the waste liquid generated during the chromatography analysis is not purified, it will seriously endanger the life safety of the experimenters. Due to the toxic and harmful characteristics of the waste liquid, the conventional method currently used is to let the discharged volatile organic waste liquid flow into the waste liquid collection bottle through a catheter, and set a waste liquid safety bottle cap on the waste liquid collection bottle, and use the adsorption filter set on the waste liquid safety bottle cap to prevent the solvent from volatilizing outwards, so as to protect the safety of the experimenters and the laboratory environment from being polluted.

[0004] Existing waste liquid safety bottle caps generally have waste liquid pipes, filters, liquid level floats, liquid level alarms and other structural parts installed on the bottle caps. In order to install these structural parts, multiple mounting holes need to be opened on the bottle caps. The more mounting holes there are, the greater the risk of gas leakage. This will inevitably cause the volatile waste liquid in the bottle or the waste gas generated by the reaction to leak out of the bottle through the mounting holes, thereby polluting the laboratory environment. Moreover, installing so many structural parts on a bottle cap of limited size makes the top of the bottle cap relatively messy and crowded, and inconvenient to install and maintain. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to provide an integrated waste liquid collection sealing bottle cap for liquid chromatograph in view of the technical defects of existing safety bottle caps, such as high risk of air leakage and complicated and crowded structure.

[0006] The utility model adopts the following technical solutions to solve the above technical problems:

[0007] An integrated waste liquid collection sealing bottle cap for liquid chromatograph comprises a bottle cap body, a catheter joint, a filter, a liquid level float and a liquid level alarm, wherein: the catheter joint and the filter are threadedly mounted on the top of the bottle cap body, the upper end of the liquid level float can slide up and down and is limitedly arranged in the lower end pipe mouth of the filter, and the top end of the liquid level float is arranged opposite to the contact of the liquid level alarm fixedly mounted on the lower wall of the filter.

[0008] Preferably, the filter comprises a coaxially arranged conical transition cylinder, an adsorption filter cylinder and a filter cylinder cover, wherein:

[0009] The lower end of the conical transition cylinder is threadedly assembled in the second threaded hole at the top of the bottle cap body, and the top end is threadedly connected to the lower end of the adsorption filter cylinder;

[0010] The bottom of the adsorption filter cartridge is provided with a breathable mesh plate, and the upper end is threadedly connected to the filter cartridge cover.

[0011] Preferably, the conical transition tube is funnel-shaped, and two limit brackets for passing the liquid level float are arranged in the tube body at the lower end thereof from top to bottom at intervals.

[0012] Preferably, the liquid level alarm is installed on the cylinder body at the upper end of the conical transition cylinder, and a limit ring and a sealing ring are provided on the tube body at the upper part of the external thread at the lower end.

[0013] Preferably, the inner peripheral wall of the lower end of the adsorption filter cartridge is provided with a support platform, and the air-permeable mesh plate is mounted on the support platform.

[0014] Preferably, the inverted cone-shaped structure with a depression in the middle of the air-permeable mesh plate is used for filling adsorption particles, and is evenly distributed with a number of through holes with a smaller aperture than that of the adsorption particles.

[0015] Preferably, a PTFE filter membrane is embedded in the inner top of the filter cartridge cover, a plurality of air holes are opened on the top spherical surface, and anti-slip patterns are provided on the outer peripheral wall.

[0016] Preferably, the liquid level float comprises a float rod and a float body arranged at the lower end of the float rod, wherein:

[0017] The top end of the floating rod can be abutted and connected with the contact point when it moves upward, and a limit block is sleeved on the upper end thereof, and the limit block is limitedly installed between the upper and lower limit brackets.

[0018] Preferably, the bottle cap body comprises a lower cover body and an upper cover body which are coaxially arranged, wherein:

[0019] The upper cover body can be rotatably limited and installed in the through hole at the top of the lower cover body through a limiting protrusion arranged on its outer circumference, and a first threaded hole and a second threaded hole are opened on the top.

[0020] Preferably, the bottle cap body further comprises a sealing gasket, wherein:

[0021] The sealing pad is fixedly sleeved on the bottom of the lower end of the upper cover body, and its diameter is larger than the inner diameter of the waste liquid bottle mouth to seal the waste liquid bottle mouth.

[0022] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0023] The utility model provides an integrated waste liquid collection sealing bottle cap for a liquid chromatograph, which integrates a filter, a liquid level float and a liquid level alarm into one, thereby avoiding excessive openings on the bottle cap and reducing gaps for waste gas leakage. The filter, liquid level float and liquid level alarm are designed in one piece, and the structural arrangement is simpler and convenient to install and maintain. The filter adopts an upper, middle and lower three-section structure, which is convenient for replacing adsorbed particles inside the filter, prolonging the service life of the filter and reducing the use cost, and is also convenient for replacing and maintaining the built-in filter and liquid level float. The waste liquid collection sealing bottle cap has a simple and novel structural design and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main structure of an integrated waste liquid collection sealing bottle cap for liquid chromatograph of the utility model;

[0025] Figure 2 This is a schematic cross-sectional view of a waste liquid collection and sealing bottle cap for an integrated liquid chromatograph of the utility model;

[0026] Figure 3 The utility model is a three-dimensional structure diagram of a waste liquid collection and sealing bottle cap for an integrated liquid chromatograph Figure 1 ;

[0027] Figure 4 The utility model is a three-dimensional structure diagram of a waste liquid collection and sealing bottle cap for an integrated liquid chromatograph Figure 2 ;

[0028] Figure 5 It is a partial cross-sectional structural schematic diagram of a waste liquid collection sealing bottle cap for an integrated liquid chromatograph of the utility model;

[0029] Figure 6 The utility model is a schematic cross-sectional structure diagram of a filter and a liquid level alarm in a waste liquid collection sealing bottle cap for an integrated liquid chromatograph. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0032] In some embodiments, Figure 3 , Figure 4 and Figure 5 As shown, an integrated waste liquid collection sealed bottle cap for liquid chromatograph is provided, and the sealed bottle cap mainly comprises a bottle cap body 10, a conduit connector 20, a filter 30, a liquid level float 40 and a liquid level alarm 50. The conduit connector 20 and the filter 30 are respectively threadedly mounted in the mounting holes on the top of the bottle cap body 10, and the liquid level float 40 and the liquid level alarm 50 are integrated and mounted in the filter 30, without the need to open additional holes to install the liquid level float 40 and the liquid level alarm 50, thereby reducing the number of holes on the bottle cap, reducing the risk of air leakage, and ensuring the environmental safety of the laboratory.

[0033] Specifically, the conduit connector 20 and the filter 30 are installed in the threaded hole at the top of the bottle cap body 10 by a detachable threaded connection, and can be sealed by a sealing ring as needed. The liquid level float 40 and the liquid level alarm 50 adopt a hidden structure design, and the upper end of the liquid level float 40 can be slid up and down and limitedly set in the lower end pipe mouth of the filter 30, and the liquid level float 40 is connected with the inner pipe wall at the lower end of the filter 30 with a gap, which can facilitate the discharge of exhaust gas.

[0034] When the organic volatile waste liquid is input into the waste liquid bottle, when the waste liquid in the waste liquid bottle reaches a certain liquid level, the liquid level float 40 moves upward with the liquid level, because the top of the liquid level float 40 is arranged opposite to the contact 51 of the liquid level alarm 50 fixedly installed on the lower wall of the filter 30. The top of the floating liquid level float 40 contacts the contact 51 of the liquid level alarm 50, triggering the liquid level alarm 50 to sound an alarm, so as to remind the staff to replace the waste liquid bottle in time to avoid waste liquid overflow and pollute the environmental safety in the laboratory.

[0035] In some of the embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the filter 30 mainly includes a coaxially arranged conical transition cylinder 31, an adsorption filter cylinder 32 and a filter cylinder cover 33, and the conical transition cylinder 31, the adsorption filter cylinder 32 and the filter cylinder cover 33 are threadedly connected in sequence from bottom to top in a detachable manner. The filter 30 adopts a three-section structure of upper, middle and lower sections, which is convenient for replacing the adsorbed particles inside the filter, prolonging the service life of the filter and reducing the use cost, and is also convenient for replacing and maintaining the built-in filter and liquid level float.

[0036] The lower end of the conical transition cylinder 31 is threadedly installed in the second threaded hole 122 at the top of the bottle cap body 10, and the top end is threadedly connected to the lower end of the adsorption filter cylinder 32. The bottom of the adsorption filter cylinder 32 is provided with an air-permeable mesh plate 322, and the cylinder space above the air-permeable mesh plate 322 is used to store adsorption particles. The upper end of the adsorption filter cylinder 32 is threadedly connected to the filter cylinder cover 33. Through the filter cylinder cover 33, adsorption particles can be added to the adsorption filter cylinder 32, and regular replacement is performed to achieve the reuse of the filter and reduce the use cost.

[0037] In some of the embodiments, Figure 5 and Figure 6 As shown, the conical transition tube 31 is funnel-shaped, and two limit brackets 311 for passing the liquid level float 40 are arranged in the tube body at the lower end thereof from top to bottom.

[0038] As needed, the limit bracket 311 is in the shape of a circular ring as a whole, and is welded to the inner wall of the tube body at the lower end of the conical transition tube 31 by connecting rods on all sides. The two limit brackets 311 are used to limit the float rod 41 installed at the upper end of the liquid level float 40, which plays a limiting role to prevent the liquid level float 40 from shaking in the tube body at the lower end of the conical transition tube 31, and at the same time prevent the liquid level float 40 from sticking to the wall and affecting the discharge of exhaust gas.

[0039] Among them, the liquid level alarm 50 is installed on the cylinder body at the upper end of the conical transition cylinder 31. The liquid level alarm 50 can be installed on the cylinder body at the upper end of the conical transition cylinder 31 by threaded connection and sealed, or the liquid level alarm 50 can be directly welded to the cylinder body of the conical transition cylinder 31 as needed to achieve an integrated connection.

[0040] In addition, a connecting conduit is provided at the lower end of the conical transition tube 31, the lower end of the conduit is provided with an external thread, and a limit ring 312 and a sealing ring 313 are provided on the tube body above the external thread. The limit ring 312 is an integral structure with the conduit, and a sealing ring 313 is sleeved on the tube body below it.

[0041] During use, when the tapered transition cylinder 31 is manually screwed into the second threaded hole 122 , the sealing ring 313 is squeezed on the top of the bottle cap body 10 , thereby ensuring the sealing between the lower end of the tapered transition cylinder 31 and the bottle cap body 10 .

[0042] In some of the embodiments, Figure 5 and Figure 6As shown, in order to facilitate the installation of the air-permeable mesh plate 322, the lower conical transition cylinder 31 and the adsorption filter cylinder 32 are divided to form an independent installation space. A support platform 321 is provided on the inner peripheral wall of the lower end of the adsorption filter cylinder 32. The support platform 321 and the adsorption filter cylinder 32 are an integral structure. The air-permeable mesh plate 322 is suspended on the support platform 321 to form an installation area for installing the liquid level alarm 50 below.

[0043] As a preferred embodiment, Figure 5 and Figure 6 As shown, the inverted cone structure with a depression in the middle of the air permeable mesh plate 322 is used to load adsorption particles, and is evenly distributed with a number of through holes with a pore size smaller than that of the adsorption particles. The arrangement of the through holes facilitates the exhaust gas to pass through the adsorption particles, thereby achieving adsorption and purification of the exhaust gas.

[0044] In some of the embodiments, Figure 2 As shown, a PTFE filter membrane 331 is embedded in the inner top of the filter cartridge cover 33 , and a plurality of air holes 332 are opened on the top spherical surface. The PTFE filter membrane 331 can realize bidirectional filtration, thereby realizing the use range of the filter 30 .

[0045] In addition, as needed, in order to facilitate the replacement of adsorption particles or PTFE filter membrane 331, the filter cartridge cover 33 on the top of the adsorption filter cartridge 32 can be quickly opened, and anti-slip grooves 333 are provided on the outer peripheral wall of the filter cartridge cover 33. The anti-slip grooves 333 can help to manually rotate the filter cartridge cover 33, so as to achieve rapid separation of the filter cartridge cover 33 from the adsorption filter cartridge 32.

[0046] In some of the embodiments, Figure 2 and Figure 5 As shown, the liquid level float 40 is composed of a float rod 41 and a float body 42 disposed at the lower end of the float rod 41. When the waste liquid level increases, the float body 42 floats up, and the float rod 41 keeps moving up synchronously. When the top end of the float rod 41 moves up, it can be abutted and connected with the contact 51, triggering the liquid level alarm 50 to sound an alarm, so as to remind the staff to clean up the waste liquid in time to avoid waste liquid overflow.

[0047] In addition, a limit block 43 is sleeved on the upper end of the float rod 41, and the limit block 43 is limitedly installed between the upper and lower limit brackets 311. That is to say, when the waste liquid collected in the waste liquid barrel is less, the liquid level float 40 is mounted on the limit block 43 at the lower end as a whole, and the top end is separated from the liquid level alarm 50. When the waste liquid collected in the waste liquid barrel reaches a certain amount, the liquid level float 40 floats up as a whole, and the top end contacts the liquid level alarm 50, triggering the liquid level alarm 50 to sound an alarm. The limit block 43 at the upper end can be used to prevent the liquid level float 40 from accidentally moving up and damaging the contact 51 of the liquid level alarm 50.

[0048] In some of the embodiments, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bottle cap body 10 comprises a coaxially arranged lower cover body 11 and an upper cover body 12. The lower cover body 11 and the upper cover body 12 are designed with an anti-winding tube structure.

[0049] Specifically, the upper cover body 12 can be rotatably limited and installed in the through hole at the top of the lower cover body 11 through the limiting protrusion 123 set on its outer circumference, and a first threaded hole 121 and a second threaded hole 122 are opened on the top of the upper cover body 12, which are used to install the catheter connector 20 and the filter 30 respectively.

[0050] According to the needs, in order to ensure the sealing of the whole bottle cap body 10 and avoid air leakage at the connection between the lower cover body 11 and the upper cover body 12, a sealing gasket 13 is also provided on the bottle cap body 10. The sealing gasket 13 is fixedly sleeved on the bottom of the lower end of the upper cover body 12, and its diameter is larger than the inner diameter of the waste liquid bottle mouth to seal the waste liquid bottle mouth.

[0051] The utility model provides an integrated liquid chromatograph waste liquid collection sealing bottle cap, which integrates a filter 30, a liquid level float 40 and a liquid level alarm 50 into one body, thereby avoiding excessive openings on the bottle cap 10, reducing gaps for waste gas leakage, and having a simpler structural layout, convenient installation and maintenance, and good practicality.

[0052] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0053] Secondly, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0054] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste liquid collection sealing bottle cap for an integrated liquid chromatograph, characterized in that: The invention comprises a bottle cap body (10), a conduit connector (20), a filter (30), a liquid level float (40) and a liquid level alarm (50), wherein: the conduit connector (20) and the filter (30) are threadedly mounted on the top of the bottle cap body (10), the upper end of the liquid level float (40) can be slid up and down and limitedly arranged in the lower end pipe mouth of the filter (30), and the top end of the liquid level float (40) is arranged opposite to the contact (51) of the liquid level alarm (50) fixedly mounted on the lower wall of the filter (30).

2. The integrated liquid chromatograph waste liquid collection sealing bottle cap according to claim 1, characterized in that: The filter (30) comprises a coaxially arranged conical transition cylinder (31), an adsorption filter cylinder (32) and a filter cylinder cover (33), wherein: The lower end of the conical transition cylinder (31) is threadedly assembled in the second threaded hole (122) at the top of the bottle cap body (10), and the top end is threadedly connected to the lower end of the adsorption filter cylinder (32); The bottom of the adsorption filter cartridge (32) is provided with a breathable mesh plate (322), and the upper end is threadedly connected to the filter cartridge cover (33).

3. The waste liquid collection sealing bottle cap for the integrated liquid chromatograph according to claim 2, characterized in that: The conical transition tube (31) is funnel-shaped, and two position-limiting brackets (311) for passing the liquid level float (40) are arranged in a spaced relationship from top to bottom in the tube body at the lower end thereof.

4. The integrated liquid chromatograph waste liquid collection sealing bottle cap according to claim 2, characterized in that: The liquid level alarm (50) is installed on the cylinder body at the upper end of the conical transition cylinder (31), and a limit ring (312) and a sealing ring (313) are arranged on the tube body at the upper part of the external thread at the lower end.

5. The waste liquid collection sealing bottle cap for the integrated liquid chromatograph according to claim 2, characterized in that: The inner peripheral wall at the lower end of the adsorption filter cartridge (32) is provided with a support platform (321), and the air-permeable mesh plate (322) is mounted on the support platform (321).

6. The waste liquid collection sealing bottle cap for the integrated liquid chromatograph according to claim 2, characterized in that: The inverted cone-shaped structure with a concave middle portion of the air-permeable mesh plate (322) is used to load adsorption particles, and is evenly distributed with a number of through holes with a smaller aperture than the adsorption particles.

7. The waste liquid collection sealing bottle cap for the integrated liquid chromatograph according to claim 2, characterized in that: A PTFE filter membrane (331) is embedded in the inner top of the filter cartridge cover (33), a plurality of air holes (332) are opened on the top spherical surface, and anti-slip grooves (333) are arranged on the outer peripheral wall.

8. The waste liquid collection sealing bottle cap for an integrated liquid chromatograph according to claim 1, characterized in that: The liquid level float (40) comprises a float rod (41) and a float body (42) arranged at the lower end of the float rod (41), wherein: The top end of the floating rod (41) can be abutted and connected with the contact point (51) when moving upward, and a limit block (43) is sleeved on the upper end thereof, and the limit block (43) is installed between the upper and lower limit brackets (311) for limiting position.

9. The waste liquid collecting sealing bottle cap for the integrated liquid chromatograph according to claim 1, characterized in that: The bottle cap body (10) comprises a lower cover body (11) and an upper cover body (12) which are coaxially arranged, wherein: The upper cover body (12) can be rotatably limited and installed in the through hole at the top of the lower cover body (11) through a limiting protrusion (123) provided on its outer circumference, and a first threaded hole (121) and a second threaded hole (122) are opened on the top.

10. The waste liquid collection sealing bottle cap for the integrated liquid chromatograph according to claim 9, characterized in that: The bottle cap body (10) further comprises a sealing gasket (13), wherein: The sealing pad (13) is fixedly sleeved on the bottom of the lower end of the upper cover body (12), and its diameter is larger than the inner diameter of the waste liquid bottle mouth, so as to seal the waste liquid bottle mouth.

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