A pressure-balanced continuous discharge device for waste liquid in sample pretreatment

Abstract

The present invention discloses a pressure-balanced continuous discharge device for waste liquid in sample pretreatment, belonging to the technical field of water quality sample treatment. A pressure-balanced continuous discharge device for waste liquid in sample pretreatment includes: a filtrate collection bottle; a liquid inlet pipe and a first vacuum pipe are connected to the bottle mouth of the filtrate collection bottle; a waste liquid converter; the waste liquid converter is respectively connected to the top and bottom of the filtrate collection bottle; the waste liquid converter is also respectively connected to a first waste liquid bottle and a second waste liquid bottle. Through the conversion of the waste liquid converter, the waste liquid alternately enters the first waste liquid bottle and the second waste liquid bottle to achieve continuous discharge. The waste liquid converter of the present invention can change the filtrate flow path, and under the action of an external vacuum device, alternately introduce the filtrate into the first waste liquid bottle and the second waste liquid bottle to achieve continuous discharge of the filtrate. The whole operation is simple, avoiding repeated emptying and vacuum pumping operations, thereby improving the sample quality and greatly improving the operation and work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality sample treatment, and particularly relates to a pressure balance type waste liquid continuous discharge device for sample pretreatment. Background Art

[0002] The description of the background art in the present invention belongs to the related art related to the present invention, and is only used to illustrate and facilitate the understanding of the invention content of the present invention, and should not be construed as the applicant clearly believing or presuming that the applicant believes it is the prior art on the filing date of the first application of the present invention.

[0003] In the pretreatment of water quality samples, methods such as solid phase extraction or chlorophyll determination require filtering large volumes of water quality samples. The main problem in the operation is that when batch samples are processed, the volume of the filtrate collection bottle in the vacuum system is too small, and during the operation, it is necessary to continuously stop the machine to vent, pour out the liquid in the collection bottle, and the continuous venting and vacuum pumping operations have a greater impact on the quality, operation, and working efficiency of sample pretreatment. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressure balance type waste liquid continuous discharge device for sample pretreatment, so as to solve the problem that when the existing water quality samples are pretreated, continuous venting and vacuum pumping operations are required, which affect the sample quality, operation, and working efficiency.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A pressure balance type waste liquid continuous discharge device for sample pretreatment, comprising:

[0007] A filtrate collection bottle; a liquid inlet pipe and a first vacuum pipe are connected to the bottle mouth of the filtrate collection bottle;

[0008] A waste liquid converter; the waste liquid converter is respectively connected to the top and bottom of the filtrate collection bottle; the waste liquid converter is also respectively connected to a first waste liquid bottle and a second waste liquid bottle, and through the conversion of the waste liquid converter, the waste liquid alternately enters the first waste liquid bottle and the second waste liquid bottle to achieve continuous discharge.

[0009] The waste liquid converter of the present invention can change the filtrate flow path, and under the action of an external vacuum device, alternately introduce the filtrate into the first waste liquid bottle and the second waste liquid bottle to achieve continuous discharge of the filtrate. The whole operation is simple, avoiding repeated venting and vacuum pumping operations, thereby improving the sample quality and greatly improving the operation and working efficiency.

[0010] Further, the above waste liquid converter includes a sliding cylinder and a slider sliding in the sliding cylinder;

[0011] The sliding cylinder includes a connecting end communicating with the bottom of the filtrate collection bottle and an extending end away from the filtrate collection bottle; the side wall of the sliding cylinder communicates with the top of the filtrate collection bottle, the first waste liquid bottle and the second waste liquid bottle respectively;

[0012] The slider is provided with a first water flow channel, a second water flow channel, a first gas channel and a second gas channel;

[0013] When the first gas channel communicates with the top of the filtrate collection bottle and the first waste liquid bottle respectively, the second water flow channel communicates with the bottom of the filtrate collection bottle and the second waste liquid bottle respectively;

[0014] When the first water flow channel communicates with the bottom of the filtrate collection bottle and the first waste liquid bottle respectively, the second gas channel communicates with the top of the filtrate collection bottle and the second waste liquid bottle respectively.

[0015] The slider of the present invention can slide in the sliding cylinder. By adjusting the position of the slider, the connection mode of each channel is changed. Specifically:

[0016] When the first gas channel communicates with the top of the filtrate collection bottle and the first waste liquid bottle respectively, the second water flow channel communicates with the bottom of the filtrate collection bottle and the second waste liquid bottle respectively, realizing that while the first waste liquid bottle is evacuated, the filtrate flows to the second waste liquid bottle. At this time, both ends of the second gas channel and the first water flow channel are blocked, and no fluid flows in or out;

[0017] After the slider slides, the first water flow channel communicates with the bottom of the filtrate collection bottle and the first waste liquid bottle respectively, and at the same time the second gas channel communicates with the top of the filtrate collection bottle and the second waste liquid bottle respectively, realizing that while the second waste liquid bottle is evacuated, the filtrate flows to the first waste liquid bottle. At this time, both ends of the first gas channel and the second water flow channel are blocked, and no fluid flows in or out.

[0018] By sliding the slider repeatedly, the first waste liquid bottle and the second waste liquid bottle alternately collect the filtrate.

[0019] Further, the side wall of the above-mentioned sliding cylinder communicates with the top of the filtrate collection bottle, the first waste liquid bottle and the second waste liquid bottle through a second vacuum tube, a first connecting nozzle and a second connecting nozzle respectively.

[0020] Further, the above-mentioned second vacuum tube communicates with the top side of the sliding cylinder, and both the first connecting nozzle and the second connecting nozzle communicate with the bottom side of the sliding cylinder.

[0021] Further, sealing rings are respectively arranged on both sides of the openings corresponding to the first water flow channel, the second water flow channel, the first gas channel and the second gas channel and each connecting nozzle.

[0022] The sealing rings provided in the present invention can enable the fluid to flow in the corresponding channels, and at the same time can play a sealing role, facilitating evacuation.

[0023] Further, the above-mentioned sealing ring is sleeved on the slider.

[0024] Further, the first connecting nozzle and the second connecting nozzle are respectively provided with a first sealing valve and a second sealing valve.

[0025] The first sealing valve and the second sealing valve of the present invention are used for intercepting the flow, which is convenient for treating the filtrate in the first waste liquid bottle and the second waste liquid bottle.

[0026] Further, the first waste liquid bottle and the second waste liquid bottle are respectively detachably connected to the first connecting nozzle and the second connecting nozzle.

[0027] Further, the above-mentioned slider is connected with a push rod, and the push rod extends out of the insertion end.

[0028] The present invention has the following beneficial effects:

[0029] (1) The waste liquid converter of the present invention can change the filtrate flow path. Under the action of an external vacuum device, the filtrate is alternately introduced into the first waste liquid bottle and the second waste liquid bottle to achieve continuous discharge of the filtrate. The whole operation is simple, avoiding repeated emptying and vacuum pumping operations, thereby improving the sample quality and greatly improving the operation and work efficiency.

[0030] (2) The present invention can realize the change of the fluid flow path only by moving the piston. The whole device has low cost and simple operation. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the pressure balance type sample pretreatment waste liquid continuous discharge device of the present invention;

[0032] Figure 2 is a schematic structural diagram of the filtrate collection bottle of the present invention;

[0033] Figure 3 is a schematic structural diagram of the waste liquid converter of the present invention;

[0034] Figure 4 is a schematic structural diagram of the slider of the present invention;

[0035] Figure 5 is a schematic structural diagram of the waste liquid converter when the first collection bottle of the present invention is evacuated (which is the same as Figure 3 );

[0036] Figure 6 is a schematic structural diagram of the waste liquid converter when the second collection bottle of the present invention is evacuated.

[0037] In the figure: 10 - filtrate collection bottle; 11 - liquid inlet pipe; 12 - first vacuum tube; 20 - waste liquid converter; 21 - sliding cylinder; 22 - slider; 30 - first waste liquid bottle; 40 - second waste liquid bottle; 211 - connection end; 212 - extending end; 213 - second vacuum tube; 214 - first connection nozzle; 215 - second connection nozzle; 216 - first sealing valve; 217 - second sealing valve; 221 - first water flow channel; 222 - second water flow channel; 223 - first gas channel; 224 - second gas channel; 225 - push rod; 226 - sealing ring. Detailed implementation manners

[0038] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0039] Please refer to Figure 1 , a pressure - balanced continuous discharge device for waste liquid in sample pretreatment, comprising: a filtrate collection bottle 10 and a waste liquid converter 20; the waste liquid converter 20 is communicated with a first waste liquid bottle 30 and a second waste liquid bottle 40. Through the conversion of the waste liquid converter 20, the filtrate can be alternately introduced into the first waste liquid bottle 30 and the second waste liquid bottle 40, realizing continuous discharge, avoiding repeated emptying and vacuum pumping operations, thereby improving the sample quality and greatly improving the operation and work efficiency.

[0040] Please refer to Figure 2 , a sealing plug is provided at the bottle mouth of the filtrate collection bottle 10. The liquid inlet pipe 11 and the first vacuum tube 12 pass through the sealing plug. Both the liquid inlet pipe 11 and the first vacuum tube 12 extend into the top of the filtrate collection bottle 10. The liquid inlet pipe 11 is used to introduce the filtrate into the filtrate collection bottle 10, and the first vacuum tube 12 is communicated with an external vacuum device for evacuating the filtrate collection bottle 10, the first waste liquid bottle 30 and the second waste liquid bottle 40. In other embodiments of the present invention, the ends of the liquid inlet pipe 11 and the first vacuum tube 12 extending into the filtrate collection bottle 10 share the same part, that is, the liquid inlet pipe 11 and the first vacuum tube 12 are integrally in a three - pronged shape. At this time, the negative pressure generated by the vacuum device should be insufficient to suck in the filtrate.

[0041] Please refer to Figure 3 , the waste liquid converter 20 includes a sliding cylinder 21 and a slider 22. When the slider 22 slides in the sliding cylinder 21, it can change the flow paths of the filtrate and air, so as to be able to alternately introduce the filtrate into the first waste liquid bottle 30 and the second waste liquid bottle 40.

[0042] The sliding cylinder 21 is horizontally arranged and includes a connecting end 211 and an extending end 212. The connecting end 211 is fixed on the bottom side wall of the filtrate collection bottle 10, and the connecting end 211 is also communicated with the filtrate collection bottle 10 through a liquid flow hole opened on the filtrate collection bottle 10. The top side wall of the sliding cylinder 21 is communicated with the top of the filtrate collection bottle 10 through a second vacuum tube 213. The bottom side wall of the sliding cylinder 21 is respectively communicated with a first connecting nozzle 214 and a second connecting nozzle 215. The first connecting nozzle 214 is located between the filtrate collection bottle 10 and the second connecting nozzle 215.

[0043] Threads are respectively provided on the outer sides of the first connecting nozzle 214 and the second connecting nozzle 215. The first waste liquid bottle 30 and the second waste liquid bottle 40 are respectively connected to the first waste liquid bottle 30 and the second waste liquid bottle 40 in a way of threaded sealing fit, so that the first waste liquid bottle 30 and the second waste liquid bottle 40 can be respectively detached from the first connecting nozzle 214 and the second connecting nozzle 215, which is convenient for the collection of filtrate. In order not to affect the operation of the discharge device, a first sealing valve 216 and a second sealing valve 217 are respectively provided on the first connecting nozzle 214 and the second connecting nozzle 215 for truncating the first connecting nozzle 214 and the second connecting nozzle 215.

[0044] In other embodiments of the present invention, the first waste liquid bottle 30 and the second waste liquid bottle 40 can also be respectively connected to the first waste liquid bottle 30 and the second waste liquid bottle 40 in a detachable and sealed fit manner such as snap connection

[0045] Please refer to Figure 3 and Figure 4 , the slider 22 is provided with a first water flow channel 221, a second water flow channel 222, a first gas channel 223 and a second gas channel 224. One of the openings of the first water flow channel 221 and the second water flow channel 222 is located at one end of the slider 22 close to the connecting end 211, and the other openings of the first water flow channel 221 and the second water flow channel 222 are located at the bottom side of the slider 22 and respectively match the first connecting nozzle 214 and the second connecting nozzle 215. One of the openings of the first gas channel 223 and the second gas channel 224 is located at the top side of the slider 22 and corresponds to the second vacuum tube 213, and the other openings of the first gas channel 223 and the second gas channel 224 are located at the bottom side of the slider 22 and respectively match the first connecting nozzle 214 and the second connecting nozzle 215. The openings of the first water flow channel 221, the first gas channel 223, the second gas channel 224 and the second water flow channel 222 at the bottom side of the slider 22 are arranged in sequence along the direction from the connecting end 211 to the extending end 212; the openings of the first gas channel 223 and the second gas channel 224 at the top side of the slider 22 are arranged in sequence along the direction from the extending end 212 to the connecting end 211.

[0046] The arrangement of the first water flow channel 221, the second water flow channel 222, the first gas channel 223, and the second gas channel 224 needs to meet the following conditions:

[0047] When the first gas channel 223 is respectively connected to the second vacuum tube 213 and the first waste liquid bottle 30, the second water flow channel 222 is respectively connected to the bottom of the filtrate collection bottle 10 and the second waste liquid bottle 40. At this time, both ends of the first water flow channel 221 and the second gas channel 224 are blocked, and no fluid passes through.

[0048] When the first water flow channel 221 is respectively connected to the bottom of the filtrate collection bottle 10 and the first waste liquid bottle 30, the second gas channel 224 is respectively connected to the top of the filtrate collection bottle 10 and the second waste liquid bottle 40. At this time, both ends of the first gas channel 223 and the second water flow channel 222 are blocked, and no fluid passes through.

[0049] In this embodiment, the first water flow channel 221, the second water flow channel 222, and the second gas channel 224 are located inside the slider 22, and the first gas channel 223 is located on the surface of the slider 22. In other embodiments of the present invention, the arrangement of the first water flow channel 221, the second water flow channel 222, the first gas channel 223, and the second gas channel 224 only needs to meet the above conditions.

[0050] To ensure the sealing of each channel, sealing rings 226 are respectively provided on both sides of the openings (i.e., the openings corresponding to each connecting nozzle) on the bottom side of the slider 22 where the first water flow channel 221, the second water flow channel 222, the first gas channel 223, and the second gas channel 224 are located. At the same time, the sealing rings 226 are sleeved on the slider 22, facilitating movement along with the movement of the slider 22 to ensure that there are sealing rings 226 on both sides of the above-mentioned openings. Obviously, the sealing rings 226 can also be provided inside the sliding cylinder 21. After the slider 22 slides, it is only necessary to ensure that there are sealing rings 226 on both sides of the above-mentioned openings respectively.

[0051] To facilitate the sliding of the slider 22, the slider 22 is connected with a push rod 225, and the push rod 225 extends out of the insertion end 212.

[0052] Please refer to Figure 5 and Figure 6 , for the pressure balance type sample pretreatment waste liquid continuous discharge device of the present invention, its continuous discharge process is as follows:

[0053] (1) When the volume of the filtered sample is less than or equal to the collection volume of the filtrate collection bottle 10, the first sealing valve 216 and the second sealing valve 217 are closed, and its operation is the same as that of an ordinary vacuum filter.

[0054] (2) When the volume of the filtered sample is greater than the collection volume of the filtrate collection bottle 10, the operation is as follows:

[0055] S1: Close the first sealing valve 216 and the second sealing valve 217, and connect the first waste liquid bottle 30 and the second waste liquid bottle 40 to the first connecting nozzle 214 and the second connecting nozzle 215 respectively.

[0056] S2: Push the slider 22 to connect the first gas channel 223 with the second vacuum tube 213 and the first waste liquid bottle 30 respectively, connect the second water flow channel 222 with the bottom of the filtrate collection bottle 10 and the second waste liquid bottle 40 respectively, open the first sealing valve 216, turn on the vacuum device to evacuate the filtrate collection bottle 10 and the first waste liquid bottle 30, and at the same time, the filtrate flows into the filtrate collection bottle 10.

[0057] S3: Push the slider 22 to connect the first water flow channel 221 with the bottom of the filtrate collection bottle 10 and the first waste liquid bottle 30 respectively, connect the second gas channel 224 with the top of the filtrate collection bottle 10 and the second waste liquid bottle 40 respectively, open the second sealing valve 217, and the vacuum device evacuates the second waste liquid bottle 40. At the same time, under the action of the pressure difference, the filtrate flows into the first waste liquid bottle 30.

[0058] S4: After the first waste liquid bottle 30 is full, close the first sealing valve 216, remove the first waste liquid bottle 30, pour out the filtrate and then install it on the first connecting nozzle 214.

[0059] S5: Push the slider 22 to connect the first gas channel 223 with the second vacuum tube 213 and the first waste liquid bottle 30 respectively, connect the second water flow channel 222 with the bottom of the filtrate collection bottle 10 and the second waste liquid bottle 40 respectively, open the first sealing valve 216, and the vacuum device evacuates the first waste liquid bottle 30. At the same time, under the action of the pressure difference, the filtrate flows into the second waste liquid bottle 40.

[0060] S6: Repeatedly pour out the filtrate in the first waste liquid bottle 30 and the second waste liquid bottle 40, and repeatedly push the slider 22 to complete the continuous discharge of the filtrate.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure-balanced continuous discharge device for waste liquid in sample pretreatment, characterized in that, Comprising: A filtrate collection bottle (10); a liquid inlet pipe (11) and a first vacuum pipe (12) are connected to the bottle mouth thereof; A waste liquid converter (20); it is respectively connected to the top and bottom of the filtrate collection bottle (10); the waste liquid converter (20) is also respectively connected to a first waste liquid bottle (30) and a second waste liquid bottle (40), and through the conversion of the waste liquid converter (20), the waste liquid alternately enters the first waste liquid bottle (30) and the second waste liquid bottle (40) to achieve continuous discharge; The waste liquid converter (20) includes a sliding cylinder (21) and a slider (22) sliding in the sliding cylinder (21); The sliding cylinder (21) includes a connection end (211) connected to the bottom of the filtrate collection bottle (10) and an extending end (212) away from the filtrate collection bottle (10); the side wall of the sliding cylinder (21) is respectively connected to the top of the filtrate collection bottle (10), the first waste liquid bottle (30) and the second waste liquid bottle (40); One of the openings of the first water flow channel (221) and the second water flow channel (222) of the slider (22) is located at one end of the slider (22) close to the connection end (211), and the other opening is located at the bottom side of the slider (22) and respectively matches the first connection nozzle (214) and the second connection nozzle (215); one of the openings of the first gas channel (223) and the second gas channel (224) of the slider (22) is located at the top side of the slider (22) and corresponds to the second vacuum pipe (213), and the other opening is located at the bottom side of the slider (22) and respectively matches the first connection nozzle (214) and the second connection nozzle (215); When the first gas channel (223) is respectively connected to the second vacuum pipe (213) and the first waste liquid bottle (30), the second water flow channel (222) is respectively connected to the bottom of the filtrate collection bottle (10) and the second waste liquid bottle (40). At this time, both ends of the first water flow channel (221) and the second gas channel (224) are blocked and no fluid passes through; When the first water flow channel (221) is respectively connected to the bottom of the filtrate collection bottle (10) and the first waste liquid bottle (30), the second gas channel (224) is respectively connected to the top of the filtrate collection bottle (10) and the second waste liquid bottle (40). At this time, both ends of the first gas channel (223) and the second water flow channel (222) are blocked and no fluid passes through.

2. The pressure balance type sample pretreatment waste liquid continuous discharge device according to claim 1, wherein The side wall of the sliding cylinder (21) is respectively connected to the top of the filtrate collection bottle (10), the first waste liquid bottle (30) and the second waste liquid bottle (40) through the second vacuum pipe (213), the first connection nozzle (214) and the second connection nozzle (215).

3. The pressure balance type continuous waste liquid discharging device for sample pretreatment according to claim 2, wherein The second vacuum pipe (213) is connected to the top side of the sliding cylinder (21), and the first connection nozzle (214) and the second connection nozzle (215) are both connected to the bottom side of the sliding cylinder (21).

4. The pressure balance type continuous waste liquid discharging device for sample pretreatment according to claim 3, wherein Sealing rings (226) are respectively provided on both sides of the openings of the first water flow channel (221), the second water flow channel (222), the first gas channel (223) and the second gas channel (224) corresponding to the connection nozzles.

5. The pressure balance type continuous waste liquid discharging device for sample pretreatment according to claim 4, wherein, The sealing ring (226) is sleeved on the slider (22).

6. The pressure balance type sample pretreatment waste liquid continuous discharge device according to claim 3, characterized in that, The first connecting nozzle (214) and the second connecting nozzle (215) are respectively provided with a first sealing valve (216) and a second sealing valve (217).

7. The pressure balance type continuous waste liquid discharging device for sample pretreatment according to claim 3, wherein The first waste liquid bottle (30) and the second waste liquid bottle (40) are respectively detachably connected to the first connecting nozzle (214) and the second connecting nozzle (215).

8. The pressure balance type continuous waste liquid discharging device for sample pretreatment according to any one of claims 1 to 7, characterized in that, The slider (22) is connected with a push rod (225), and the push rod (225) extends out of the insertion end (212).

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