Liquid removal device and liquid removal method

Abstract

The present invention proposes a liquid removal device and a liquid removal method, wherein the liquid removal device comprises a liquid package and a liquid removal auxiliary device; the liquid package comprises a hollow tube, a feed port plug and a discharge port seal; the hollow tube is a hollow hose and / or the feed port plug is a hose plug; the feed port plug is plugged into the feed port of the hollow tube to achieve feed port sealing, and the discharge port seal is arranged at the discharge port of the hollow tube to achieve discharge port sealing; the liquid removal auxiliary device comprises an auxiliary device body and a push assembly; the push assembly is arranged in the auxiliary device body; the auxiliary device body comprises a clamping port, one end of the feed port of the hollow tube is inserted into the clamping port, and the feed port plug and the ejector pin of the push assembly conflict with each other. Thus, a liquid removal device with a simple structure, low manufacturing cost and easy operation is proposed, and the liquid removal method of the present invention is also convenient for removing all the liquid in the hollow tube, thereby avoiding waste of liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a liquid removal device and a liquid removal method. Background Art

[0002] As the country attaches more importance to food and environmental testing, the amount of standard products and standard solutions (hereinafter referred to as standard products) used for testing is increasing. Standard products are of various types and in various forms. In this field, when the standard product is a relatively viscous liquid with relatively poor fluidity, it is easy to adhere to the side wall of the package, resulting in incomplete liquid extraction and difficulty in partial liquid extraction. In the field of testing, the accuracy of the required amount of standard products is relatively high. For some trace standard products, such as 20mg / bottle standard products, customers generally have five important requirements when using them:

[0003] 1. Good sealing to prevent volatilization;

[0004] 2. There is less air in the package, which reduces the oxygen content and the risk of oxidation;

[0005] 3. Convenient sampling, and the sampling weight can be weighed on the balance;

[0006] 4. All or part of the equipment can be removed without any waste;

[0007] 5. The material is inert and does not react with the standard.

[0008] However, the current packaging of fluidity standards on the market cannot solve all problems. Common packaging of trace fluidity standards on the market: small-capacity glass bottles or glass packaging bottles with threaded caps / crimp caps, commonly 1ml and 2ml packaging.

[0009] For 1-2ml glass packaging bottles, there are the following shortcomings:

[0010] 1. The bottle is too large. When 1ml is filled with 20mg (about 0.02ml), there is a lot of residual air. Sensitive samples need to be filled with inert gas to remove it during packaging.

[0011] 2. Inconvenient packaging; sampling is difficult and cannot be completely removed. For some viscous liquids, they cannot be completely poured out due to adhesion to the wall, and cannot be completely removed by suction with a syringe, resulting in serious waste;

[0012] If you want to remove all of it, you need to weigh it using the following differential method: weigh the total bottle weight---introduce other solvents into the bottle to dissolve them all---transfer them to a clean glass bottle---clean the inner wall of the bottle with solvent---transfer the cleaning solution to a clean glass bottle---repeat the cleaning for about 5 times---dry the packaging bottle---return to room temperature---weigh the empty bottle weight---the total bottle weight minus the empty bottle weight = the total weight removed. The steps are very cumbersome.

[0013] 3. The differential method cannot accurately weigh the specific weight required by the experiment. For example, if the sample in the packaging bottle is about 23 mg and the experiment requires 19-21 mg, only 23 mg can be removed, which is inflexible.

[0014] 4. When glass packaging bottles are used, the sealing is good, but it is difficult for manufacturers to package them. Sealing equipment is required, and the manufacturing cost is high;

[0015] 5. When choosing a glass bottle with a lid, the packaging is simple, but the matching degree between the lid and the sealing gasket and the force of screwing the lid determine the sealing of the bottle. Summary of the invention

[0016] The purpose of the present invention is to provide a liquid removal device with simple structure, low manufacturing cost and simple operation, and a liquid removal method for facilitating the complete removal of liquid in a hollow tube.

[0017] To achieve the above object, the present invention provides a liquid removal device, comprising a liquid package and a liquid removal auxiliary device;

[0018] Wherein, the liquid packaging comprises a hollow tube, a feed port plug and a discharge port sealing member; the hollow tube is a hollow hose and / or the feed port plug is a hose plug; one end of the hollow tube is a feed port, and the other end of the hollow tube is a discharge port, the feed port plug is plugged into the feed port of the hollow tube to achieve feed port sealing, and the discharge port sealing member is arranged at the discharge port of the hollow tube to achieve discharge port sealing;

[0019] The liquid removal auxiliary device includes an auxiliary device body and a pushing component; the pushing component is placed in the auxiliary device body; the auxiliary device body includes a clamping port, one end of the feed port of the hollow tube is inserted into the clamping port, and the feed port pipe plug and the ejector pin of the pushing component are in conflict with each other.

[0020] Preferably, the feed port plug is a spherical plug or a cylindrical plug;

[0021] The diameter of the feed port pipe plug is larger than the inner diameter of the hollow tube, so as to achieve an interference fit between the feed port pipe plug and the hollow tube.

[0022] Preferably, the discharge port sealing member is a spherical pipe plug or a cylindrical pipe plug; the discharge port sealing member is plugged into the discharge port of the hollow pipe;

[0023] The diameter of the discharge port sealing member is larger than the inner diameter of the hollow tube, so that an interference fit is achieved between the discharge port sealing member and the hollow tube.

[0024] Preferably, the discharge port sealing member is a tube cap, which is sleeved on the discharge port of the hollow tube, and the tube cap and the outer wall of the discharge port of the hollow tube achieve interference fit.

[0025] Preferably, the auxiliary device body is a hollow cylinder, and through holes are provided on the top and bottom of the auxiliary device body; the through hole at the bottom of the auxiliary device is the clamping port.

[0026] Preferably, the pushing assembly comprises a straight rack, a circular gear and an ejector pin; the bottom end of the straight rack is fixedly connected to the end of the ejector pin;

[0027] A mounting hole is preset on the side wall of the auxiliary device body, and the circular gear is installed in the mounting hole;

[0028] The straight rack and the ejector pin are both inserted into the auxiliary device body, and the latching teeth on the surface of the straight rack mesh with the latching teeth on the surface of the circular gear.

[0029] Preferably, the ejector pin is a stainless steel rod; the diameter of the stainless steel rod is smaller than the inner diameter of the hollow tube, and the length of the stainless steel rod is greater than the length of the hollow tube.

[0030] Preferably, the pushing assembly further includes a handle, and the top end of the straight rack passes through a through hole at the top of the auxiliary device body and is connected to the handle.

[0031] Preferably, the liquid removal auxiliary device further comprises a chuck and a clamp;

[0032] The quick-insertion connector is preset in the auxiliary device body near the clamping port, and a through hole for passing the ejector pin is preset in the middle of the quick-insertion connector;

[0033] The outer wall of the clamping port is preset with an external thread, and the inner surface of the side wall of the clamp is preset with an internal thread. The clamp is screwed onto the clamping port through the cooperation of the external thread and the internal thread; the bottom surface of the clamp is also provided with an insertion hole for inserting the liquid package;

[0034] A top wall is arranged in the chuck around the outer periphery of the insertion hole, and the top wall and the locking tube end surface of the quick-insertion connector are in conflict with each other.

[0035] Preferably, the liquid removal auxiliary device further comprises a guide block; the guide block is pre-buried in the auxiliary device body, and the guide block is sleeved outside the straight rack to provide a guiding function for the straight rack.

[0036] Preferably, the outer surface of the auxiliary device body is provided with a protrusion which is convenient for grabbing the liquid and removing it from the auxiliary device.

[0037] A liquid removal method, using the liquid removal device as described in any one of the above, is characterized in that it comprises the following steps:

[0038] Step 1: Insert the hollow tube into the clamping opening of the auxiliary device body;

[0039] Step 2: Remove the sealing member of the outlet of the hollow tube;

[0040] Step 3: Push the plug of the hollow tube feed port toward the discharge port through the pushing component to squeeze the liquid out of the discharge port.

[0041] Compared with the prior art, the advantages of the present invention are:

[0042] 1. The hollow hose, the feed port plug and the discharge port seal use the deformation of the material itself to make the liquid packaging tightly sealed and prevent the volatilization of the liquid.

[0043] 2. The air in the liquid package is easy to discharge, the oxygen content is reduced, and the oxidation risk of the liquid is reduced.

[0044] 3. Sampling is convenient. The liquid in the liquid package can be removed by one hand using the liquid removal auxiliary device.

[0045] 4. By utilizing the liquid removal auxiliary device and the structural design of the liquid packaging itself, the liquid in the liquid packaging can be completely removed without causing waste of liquid.

[0046] 5. Liquid packaging can realize partial removal of the liquid in the package, and the remaining liquid can continue to be stored in the hollow tube and used multiple times.

[0047] 6. Liquid packaging can be designed with inert materials, such as PTFE materials, to ensure the softness of the packaging and to ensure that the packaging does not react with the liquid.

[0048] 7. The equipment has a simple structure and low cost, and is suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the overall structure of the liquid packaging in Example 1 of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure of the liquid removal auxiliary device in Example 1 of the present invention;

[0051] Figure 3 This is a flow chart of liquid transfer in Example 1 of the present invention.

[0052] Figure 4 This is a schematic diagram of the structure of the quick chuck in Example 1 of the present invention.

[0053] Figure 5 This is a schematic diagram of the overall structure of the liquid packaging in Example 2 of the present invention;

[0054] Figure 6 This is a schematic diagram of the overall structure of the liquid packaging in Example 3 of the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below. Example 1

[0056] The present invention provides a liquid removal device, comprising a liquid package and a liquid removal auxiliary device;

[0057] Among them, Figure 1 As shown, the liquid packaging includes a hollow tube 103, a feed port tube plug 101 and a discharge port sealing member 102; the hollow tube 103 is a hollow hose and / or the feed port tube plug 101 is a hose plug; one end of the hollow tube 103 is the feed port, and the other end of the hollow tube 103 is the discharge port; the feed port tube plug 101 is plugged into the feed port of the hollow tube 103 to achieve feed port sealing, and the discharge port sealing member 102 is arranged at the discharge port of the hollow tube 103 to achieve discharge port sealing.

[0058] like Figure 2 As shown, the liquid removal auxiliary device includes an auxiliary device body 204 and a pushing assembly; the pushing assembly is placed in the auxiliary device body 204; the auxiliary device body includes a clamping port, one end of the feed port of the hollow tube 103 is inserted into the clamping port, and the feed port pipe plug 101 and the ejector pin 205 of the pushing assembly are in conflict with each other.

[0059] In this embodiment, if Figure 1 As shown, the feed port pipe plug 101 and the discharge port seal 102 are both cylindrical pipe plugs, and the diameter of the cylindrical pipe plug is larger than the inner diameter of the hollow tube 103, so that the soft rubber pipe plug and the hollow tube 103 have an interference fit. The interference fit and the design of the cylindrical pipe plug achieve the best sealing between the feed port pipe plug 101 and the discharge port seal 102 and the hollow tube 103, thereby preventing the liquid in the tube from volatilizing.

[0060] In this embodiment, the hollow tube can be a hollow tube made of polytetrafluoroethylene material or a hollow tube made of glass material. Neither polytetrafluoroethylene nor glass material will react with the liquid in the tube. Polytetrafluoroethylene material is most preferred. While ensuring that the polytetrafluoroethylene material does not react with the liquid, it has a good degree of softness. When the feed port pipe plug 101 is pushed, it will not burst, and the experimental effect is better.

[0061] When the hollow tube is made of glass material, the feed port plug 101 and the discharge port seal 102 are both made of polytetrafluoroethylene material to ensure the softness of the plugs, thereby utilizing the deformation of the material itself to ensure sealing and facilitate the feed port plug 101 to be pushed from the feed port of the hollow tube 103 to the discharge port of the hollow tube 103.

[0062] In this embodiment, the auxiliary device body 204 is a hollow cylinder, and through holes are provided at the top and bottom of the auxiliary device body 204; the through hole at the bottom of the auxiliary device body 204 is a clamping opening, such as the design structure of a needle tube.

[0063] In this embodiment, the pushing assembly includes a straight rack 202, a circular gear 201 and an ejector pin 205; the bottom end of the straight rack 202 is fixedly connected to the end of the ejector pin 205;

[0064] A mounting hole is preset on the side wall of the auxiliary device body 204, and the circular gear 201 is installed in the mounting hole;

[0065] The straight rack 202 and the ejector pin 205 are both pre-inserted into the auxiliary device body 204, and the latching teeth on the surface of the straight rack 202 mesh with the latching teeth on the surface of the circular gear 201; the operator rotates the circular gear 201 with his fingers, and utilizes the transmission effect between the latching teeth to drive the straight rack 202 and the ejector pin 205 to move downward, thereby pushing the feed port plug 101 of the hollow tube 103 to move toward the discharge port.

[0066] In this embodiment, the ejector pin 205 is a stainless steel rod; the diameter of the stainless steel rod is smaller than the diameter of the hollow tube 103 , and the length of the stainless steel rod is greater than the length of the hollow tube 103 .

[0067] In this embodiment, the pushing assembly further includes a handle 207 , and the top end of the straight rack 202 passes through a through hole at the top of the auxiliary device body 204 and is connected to the handle 207 .

[0068] In this embodiment, the liquid removal auxiliary device further includes a chuck 206 and a quick-connect connector 203;

[0069] The quick-insert connector 203 is preset in the auxiliary device body 204 near the clamping port, and a through hole for passing the ejector pin 205 is preset in the middle of the quick-insert connector 203;

[0070] The outer wall of the clamping port is preset with an external thread, and the inner surface of the side wall of the clamp head 206 is preset with an internal thread. Through the cooperation of the external thread and the internal thread, the clamp head 206 is screwed on the clamping port; the bottom surface of the clamp head 206 is also provided with a plug hole for inserting the liquid package;

[0071] like Figure 4As shown, the structure of the quick-insertion connector 203 is the prior art, which includes a locking tube 301 and an inner shrinkage tube 302. A locking section 303 is provided inside the locking tube 301. The locking section 303 is a metal elastic bell-mouth structure. One end of the inner shrinkage tube 302 is inserted into the locking section 303 of the locking tube 301, and the other end of the inner shrinkage tube 302 extends out of the locking tube 301. The inner shrinkage tube 302 is mainly made of a harder material with a smooth surface, such as metal.

[0072] A top wall is provided around the outer periphery of the insertion hole in the chuck 206, and the top wall contacts the end face of the locking tube 301 of the quick-insert connector 203. The operator rotates the chuck and uses the top wall to contact the inner shrinkage tube 302 to slide toward the inner locking section 303 until the inner shrinkage tube 302 pushes the locking section 303 open. At this time, the diameter of the bell mouth of the locking section 303 becomes larger, and the hollow tube 103 is inserted into the locking section 303; then the chuck 206 is rotated in the opposite direction, and the contraction effect of the locking section 303 is used to push the inner shrinkage tube 302 out of the bell mouth, further clamping the hollow tube 103, thereby preventing the hollow tube from being displaced relative to the auxiliary device body 204 during pipetting.

[0073] In this embodiment, the liquid removal auxiliary device further includes a guide block 208 ; the guide block 208 is pre-buried in the auxiliary device body 204 , and the guide block 208 is sleeved outside the straight rack 202 to provide a guide for the straight rack 202 .

[0074] In this embodiment, the outer surface of the auxiliary device body 204 is provided with protrusions for facilitating the grabbing of liquid and removing it from the auxiliary device.

[0075] In this embodiment, the inner diameter and length of the hollow tube 103 determine the volume of the stored liquid standard. The inner diameter of the hollow tube is D and the length is L, then the maximum sample volume V=(D / 2)2πL; For example: the inner diameter of the central tube D=3mm, the length L=30mm, the sample volume V=212mm 3 (approximately equal to 0.2 ml). Compared with the traditional glass packaging, the liquid removal device of the present invention has a more sophisticated structure and complete liquid transfer, so small-diameter packaging can be prepared for the transfer of trace liquids, which is impossible with traditional packaging. The liquid transfer method of traditional packaging cannot completely transfer trace liquids, which is very inconvenient.

[0076] In order to facilitate the understanding of technical personnel in the field of boards, Figure 3 As shown, the present invention also provides a liquid removal method, the specific steps are as follows:

[0077] Step 1: Prepare liquid packaging and liquid removal aids;

[0078] Step 2: Screw the chuck 206 on the liquid removal auxiliary device to the open position, so that the diameter of the flare of the locking section 303 of the quick-connect connector 203 becomes larger;

[0079] Step 3: Insert the feed end of the hollow tube 103 into the clamping opening of the quick-insert connector 203 along the clamping opening;

[0080] Step 4: Screw the clamp 206 on the liquid removal auxiliary device to the closed position, and use the contraction effect of the locking section 303 to push the inner shrinkage tube 302 out of the bell mouth, further reducing the diameter of the bell mouth, thereby clamping the hollow tube 103;

[0081] Step 5: Remove the discharge port seal 102 of the hollow tube 103;

[0082] Step 6: Hold the liquid removal auxiliary device and use your thumb to slide the circular gear 201 to drive the straight rack 202 and the ejector pin 205 to move downward, and use the ejector pin 205 to push the feed port plug 101 toward the discharge port of the hollow tube 103.

[0083] Step 7: Push the straight rack 202 to the bottom, and the feed inlet pipe pushes all the liquid in the hollow tube 103 out;

[0084] Step 8: Screw the clamp 206 on the liquid removal auxiliary device to the open position and pull out the liquid package. Example 2

[0085] The structure and use method of the liquid removal auxiliary device in Example 2 are the same as those in Example 1, so they are not described in detail. The difference is that Figure 5 As shown, the liquid packaging includes a hollow tube 103, a feed port plug 101 and a discharge port seal 102; the discharge port seal 102 is a tube cap, which is sleeved on the discharge port of the hollow tube 103, and the tube cap is interference fit with the outer wall of the discharge port of the hollow tube 103; the design structure of the tube cap is convenient for disassembly and assembly between the discharge port seal 102 and the hollow tube 103, and when liquid transfer is required, the discharge port seal 102 is removed from the discharge port of the hollow tube 103; after removing the rear tube cap, the liquid in the hollow tube 103 is pushed out by the pushing action of the liquid removal auxiliary device, which can be removed or partially removed. After partially removed, the operator can continue to sleeve the tube cap on the discharge port of the hollow tube 103 to achieve sealing and secondary use, which is convenient for disassembly and assembly, and no excess air will enter during secondary use. The material of the tube cap is preferably polytetrafluoroethylene material. Example 3

[0086] The structure and use method of the liquid removal auxiliary device in Example 3 are the same as those in Example 1, so they are not described in detail. The difference is that Figure 6As shown, the liquid packaging includes a hollow tube 103, a feed port plug 101 and a discharge port seal 102; wherein, the feed port plug 101 is a spherical plug. The design of the spherical plug makes it easier to insert the plug into the feed port of the hollow tube 103, and since the contact surface between the spherical plug and the side wall of the hollow tube 103 is smaller, the resistance is smaller. While pipetting, it is more labor-saving to push the feed port plug 101 using a liquid removal auxiliary device.

[0087] At the same time, the discharge port seal 102 can also use a spherical tube plug. When pipetting is required, since the spherical tube plug is difficult to remove, it is necessary to cut off a section of the discharge end of the hollow tube 103 so that the spherical tube plug can be cut off before pipetting.

[0088] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A liquid removal device, characterized in that: The liquid removal device is used to remove a trace amount of fluid standard for detection, and includes a liquid package and a liquid removal auxiliary device; Wherein, the liquid packaging comprises a hollow tube, a feed port plug and a discharge port sealing member; the hollow tube is a hollow hose and / or the feed port plug is a hose plug; one end of the hollow tube is a feed port, and the other end of the hollow tube is a discharge port, the feed port plug is plugged into the feed port of the hollow tube to achieve feed port sealing, and the discharge port sealing member is arranged at the discharge port of the hollow tube to achieve discharge port sealing; The liquid removal auxiliary device comprises an auxiliary device body and a pushing component; the pushing component is placed in the auxiliary device body; the auxiliary device body comprises a clamping port, one end of the feed port of the hollow tube is inserted into the clamping port, and the feed port pipe plug and the ejector pin of the pushing component are in conflict with each other; The pushing assembly includes a straight rack, a circular gear and an ejector pin; the bottom end of the straight rack is fixedly connected to the end of the ejector pin; a mounting hole is preset on the side wall of the auxiliary device body, and the circular gear is installed in the mounting hole; the straight rack and the ejector pin are both inserted into the auxiliary device body, and the teeth on the surface of the straight rack mesh with the teeth on the surface of the circular gear; The liquid removal auxiliary device further comprises a quick-insert connector and a clamp; the quick-insert connector is preset in the auxiliary device body near the clamping port, and a through hole for passing the ejector pin is preset in the middle of the quick-insert connector; An external thread is preset on the outer wall of the clamping port, and an internal thread is preset on the inner surface of the side wall of the clamp, and the clamp is screwed on the clamping port through the cooperation of the external thread and the internal thread; the bottom surface of the clamp is also provided with a plug hole for inserting the liquid package; a top wall is provided in the clamp around the outer periphery of the plug hole, and the top wall is in conflict with the end face of the locking tube of the quick-plug connector.

2. The liquid removal device according to claim 1, characterized in that The feed port pipe plug is a spherical pipe plug or a cylindrical pipe plug; The diameter of the feed port pipe plug is larger than the inner diameter of the hollow tube, so as to achieve an interference fit between the feed port pipe plug and the hollow tube.

3. The liquid removal device according to claim 1, characterized in that The discharge port sealing member is a spherical pipe plug or a cylindrical pipe plug; the discharge port sealing member is plugged into the discharge port of the hollow pipe; The diameter of the discharge port sealing member is larger than the inner diameter of the hollow tube, so that an interference fit is achieved between the discharge port sealing member and the hollow tube.

4. The liquid removal device according to claim 1, characterized in that The discharge port sealing member is a pipe cap, which is sleeved on the discharge port of the hollow tube, and has an interference fit with the outer wall of the discharge port of the hollow tube.

5. The liquid removal device according to claim 1, characterized in that: The auxiliary device body is a hollow cylinder, and through holes are provided on the top and bottom of the auxiliary device body; the through hole at the bottom of the auxiliary device body is the clamping opening.

6. The liquid removal device according to claim 4, characterized in that: The ejector pin is a stainless steel rod; the diameter of the stainless steel rod is smaller than the diameter of the hollow tube, and the length of the stainless steel rod is greater than the length of the hollow tube.

7. The liquid removal device according to claim 4, characterized in that: The pushing assembly also includes a handle, and the top end of the straight rack passes through the through hole at the top of the auxiliary device body and is connected to the handle.

8. The liquid removal device according to claim 4, characterized in that: The liquid removal auxiliary device also includes a guide block; the guide block is pre-buried in the auxiliary device body, and the guide block is sleeved outside the straight rack to provide a guiding function for the straight rack.

9. The liquid removal device according to claim 4, characterized in that: The outer surface of the auxiliary device body is provided with a protrusion which is convenient for grabbing the liquid and removing it from the auxiliary device.

10. A liquid removal method, using the liquid removal device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Insert the hollow tube into the clamping opening of the auxiliary device body; Step 2: Remove the sealing member of the outlet of the hollow tube; Step 3: Push the plug of the hollow tube feed port toward the discharge port through the pushing component to squeeze the liquid out of the discharge port.

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