A solid phase extraction device

Abstract

This utility model relates to the field of chemical detection equipment technology, specifically disclosing a solid-phase extraction device, including: a receiving mechanism and a flow rate control mechanism assembled on the top of the receiving mechanism; the receiving mechanism includes a vacuum chamber, a sealing cover is slidably installed at the front end of the vacuum chamber, a limiting sleeve is fixedly installed on the inner wall of the sealing cover, a test tube bottle is placed inside the limiting sleeve, and a conduit corresponding to the test tube bottle is connected to the top of the vacuum chamber; the flow rate control mechanism includes a valve body connected to the front end of the conduit, an extraction cylinder is inserted into the top of the valve body, a valve core is rotatably installed inside the valve body, and a flow guiding cavity communicating with the conduit is opened inside the valve core; this utility model can set multiple flow rate levels, which can be easily adjusted to the corresponding flow rate level according to the extraction requirements, without the need for manual real-time rotation of the control valve to control the flow rate, avoiding the situation of excessively fast or slow flow rate, and bringing more convenience to solid-phase extraction.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical detection equipment, specifically relating to a solid phase extraction device. Background Technology

[0002] Solid-phase extraction is mainly used for the separation, purification, and concentration of complex matrix samples to improve the recovery rate of analytes and reduce the influence of interfering components. It has become an indispensable sample pretreatment technique in the field of analytical chemistry. Its core principle is to selectively retain target compounds through adsorbents to achieve sample purification and enrichment. It is widely used in the detection of organic pollutants in food chemicals, the detection of organic pollutants in air and water, pharmaceutical research and development, and forensic identification.

[0003] However, in current solid-phase extraction processes, it is usually necessary to control the sample flow rate, which is typically achieved by manually rotating a control valve. This method cannot accurately control the flow rate, leading to situations where the flow rate is too fast or too slow, causing considerable inconvenience to the solid-phase extraction operation. To address this issue, the applicant proposes a solid-phase extraction device to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a solid-phase extraction device that can be set with multiple flow rate levels. The flow rate can be easily adjusted to the corresponding level according to the extraction operation requirements, which can effectively improve the accuracy of the flow rate. There is no need to manually rotate the control valve in real time to control the flow rate, avoiding the situation of the flow rate being too fast or too slow, and bringing more convenience to the solid-phase extraction operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A solid-phase extraction apparatus, comprising:

[0007] A receiving mechanism and a flow rate control mechanism mounted on top of the receiving mechanism;

[0008] The receiving mechanism includes a vacuum chamber, a sealing cover is slidably installed at the front end of the vacuum chamber, a limiting sleeve is fixedly installed on the inner wall of the sealing cover, a test tube bottle is placed inside the limiting sleeve, and a conduit corresponding to the test tube bottle is connected to the top of the vacuum chamber.

[0009] The flow rate control mechanism includes a valve body connected to the front end of the conduit. An extraction cylinder is inserted into the top of the valve body. A valve core is rotatably installed inside the valve body. A flow guiding cavity communicating with the conduit is opened inside the valve core. A small through hole, a medium through hole, and a large through hole communicating with the flow guiding cavity are respectively opened on the surface of the valve core. A handle is fixedly installed at the front end of the valve core.

[0010] Preferably, a support frame for supporting the test tube bottle is fixedly installed on the inner wall of the sealing cap, and the sealing cap is fixed to the vacuum chamber by a fixing knob.

[0011] Preferably, the top of the vacuum chamber is connected to a connecting pipe, a pressure gauge is fixedly installed on the top of the connecting pipe, and a pressure relief valve is provided on the connecting pipe.

[0012] Preferably, the rear end of the throttle is provided with a sliding hole, and a locking post is slidably installed inside the sliding hole.

[0013] Preferably, the front end of the valve body is provided with a locking groove corresponding to the locking post, and a thrust spring is fixedly installed between the locking post and the sliding hole.

[0014] Preferably, the surface of the throttle is affixed with indicator marks, which correspond to the small through hole, the medium through hole, and the large through hole, respectively.

[0015] Preferably, the top of the valve body is connected to a connecting pipe for insertion into the extraction cylinder, and a filter screen is fixedly installed inside the extraction cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) This utility model is equipped with a flow rate control mechanism, which can realize multiple flow rate levels by using the small through hole, medium through hole and large through hole on the valve core. It can be conveniently adjusted to the corresponding flow rate level according to the extraction operation requirements, which can effectively improve the accuracy of the flow rate. There is no need to manually rotate the control valve in real time to control the flow rate, avoiding the situation of the flow rate being too fast or too slow, which brings more convenience to the solid phase extraction operation.

[0018] (2) The present invention is provided with a locking post and a locking groove that can engage when the handle is turned, which can easily drive the valve core to rotate and fix it, and can easily adjust the flow rate and fix it automatically, thus improving the performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the material receiving mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram of the flow rate control mechanism of this utility model;

[0022] Figure 4 This is a cross-sectional view of the valve body of this utility model;

[0023] Figure 5 This is a schematic diagram of the valve core structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the valve body's external structure according to this utility model;

[0025] In the diagram: 1. Extraction cylinder; 11. Filter screen; 2. Flow rate control mechanism; 21. Valve body; 23. Connecting pipe; 24. Rotary handle; 25. Locking post; 26. Indicator; 27. Valve core; 28. Sliding hole; 29. ​​Thrust spring; 210. Guide chamber; 211. Small through hole; 212. Medium through hole; 213. Large through hole; 214. Locking groove; 3. Material receiving mechanism; 31. Vacuum box; 32. Guide tube; 33. Connecting pipe; 34. Pressure gauge; 35. Pressure relief valve; 36. Sealing cap; 37. Test tube bottle; 38. Limiting sleeve; 39. Support frame; 310. Fixing knob. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1:

[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a solid-phase extraction apparatus includes:

[0031] Material receiving mechanism 3 and flow rate control mechanism 2 assembled on top of material receiving mechanism 3;

[0032] The receiving mechanism 3 includes a vacuum box 31. A sealing cover 36 is slidably installed at the front end of the vacuum box 31. A limiting sleeve 38 is fixedly installed on the inner wall of the sealing cover 36. A test tube bottle 37 is placed inside the limiting sleeve 38. A conduit 32 corresponding to the test tube bottle 37 is connected to the top of the vacuum box 31.

[0033] The flow rate control mechanism 2 includes a valve body 21 connected to the front end of the conduit 32. An extraction cylinder 1 is inserted into the top of the valve body 21. A valve core 27 is rotatably installed inside the valve body 21. A flow guide cavity 210 communicating with the conduit 32 is opened inside the valve core 27. A small through hole 211, a medium through hole 212 and a large through hole 213 communicating with the flow guide cavity 210 are respectively opened on the surface of the valve core 27. A handle 24 is fixedly installed at the front end of the valve core 27.

[0034] As can be seen from the above, during use, the test tube bottle 37 for receiving the extraction liquid is inserted into the limiting sleeve 38 for fixation, the test tube bottle 37 is moved into the vacuum chamber 31 so that the test tube bottle 37 corresponds with the conduit 32, and the sealing cap 36 is fitted and sealed to the front end of the vacuum chamber 31. The extraction cylinder 1 is connected by inserting it into the valve body 21, and the filter packing required for extraction is introduced into the extraction cylinder 1 for filtering and extracting the sample liquid.

[0035] By connecting the vacuum chamber 31 to the vacuum pump, the air inside the vacuum chamber 31 can be extracted, making the vacuum chamber 31 a negative pressure state. The sample liquid is then introduced into the extraction cylinder 1. The negative pressure inside the vacuum chamber 31 can be used to draw the sample liquid into the flow rate control mechanism 2. By using the handle 24, the valve core 27 can be rotated. According to the extraction operation requirements, the small through hole 211, medium through hole 212, or large through hole 213 can be selectively matched with the extraction cylinder 1. The flow rate of the sample liquid can be easily controlled according to the different hole sizes, so that the sample liquid can fully filter and extract with the filter packing in the extraction cylinder 1.

[0036] Multiple flow rate settings can be achieved through the small through-hole 211, medium through-hole 212, and large through-hole 213, allowing for easy adjustment to the corresponding flow rate setting according to the extraction operation requirements. This effectively improves the accuracy of the flow rate, eliminating the need for manual real-time rotation of the control valve to control the flow rate and avoiding situations where the flow rate is too fast or too slow. This brings greater convenience to solid-phase extraction operations. The extracted liquid can be introduced into the guide cavity 210, allowing it to flow along the guide cavity 210 into the conduit 32, and then dripped into the test tube bottle 37 for collection. By removing the test tube bottle 37, the collected extract can be easily tested.

[0037] Depend on Figure 2 It can be seen that the inner wall of the sealing cap 36 is fixedly installed with a support frame 39 for supporting the test tube bottle 37, and the sealing cap 36 is fixed to the vacuum box 31 by a fixing knob 310.

[0038] As can be seen from the above, the support frame 39 can easily support the bottom of the test tube bottle 37, and the fixing knob 310 can easily fix the sealing cap 36 to the vacuum chamber 31, so as to prevent the sealing cap 36 from becoming loose.

[0039] For details, please refer to Figure 2 As shown, the top of the vacuum chamber 31 is connected to a connecting pipe 33, a pressure gauge 34 is fixedly installed on the top of the connecting pipe 33, and a pressure relief valve 35 is provided on the connecting pipe 33.

[0040] As can be seen from the above, the connecting pipe 33 can be conveniently connected to the vacuum pump, and the vacuum pump can be used to evacuate the vacuum box 31 to make the vacuum box 31 negative pressure. By observing the pressure gauge 34 and using the pressure relief valve 35, the negative pressure value in the vacuum box 31 can be conveniently controlled to keep the negative pressure in the vacuum box 31 stable.

[0041] For details, please refer to Figure 4 As shown, a sliding hole 28 is provided at the rear end of the throttle 24, and a locking post 25 is slidably installed inside the sliding hole 28.

[0042] As can be seen from the above, by rotating the throttle 24, the locking post 25 can be moved horizontally using the sliding hole 28.

[0043] Example 2:

[0044] refer to Figure 4 and Figure 6 As shown, the front end of the valve body 21 is provided with a locking groove 214 corresponding to the locking post 25, and a thrust spring 29 is fixedly installed between the locking post 25 and the sliding hole 28.

[0045] As can be seen from the above, the thrust spring 29 can apply a thrust to the locking pin 25, which can lock the locking pin 25 into the locking groove 214 for locking operation. It can also easily drive the valve core 27 to rotate and fix it, and can easily adjust the flow rate level and then automatically fix it, thus improving the performance.

[0046] refer to Figure 3 As shown, an indicator 26 is affixed to the surface of the throttle 24, and the indicator 26 corresponds to the small through hole 211, the medium through hole 212 and the large through hole 213 respectively.

[0047] As can be seen from the above, the indicator 26 allows personnel to easily and intuitively distinguish the positions of the small through hole 211, the medium through hole 212, and the large through hole 213, and can easily adjust to the appropriate flow rate according to the extraction requirements.

[0048] refer to Figure 3 and Figure 4 As shown, the top of the valve body 21 is connected to a connecting pipe 23 for the extraction cylinder 1 to be inserted, and a filter screen 11 is fixedly installed inside the extraction cylinder 1.

[0049] As can be seen from the above, by inserting the bottom of the extraction cylinder 1 into the connecting pipe 23, the extraction cylinder 1 can be installed and disassembled relatively easily. The filter screen 11 can easily intercept and support the filter packing, preventing the filter packing from entering the valve core 27 and causing blockage.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solid phase extraction device, characterized by, include: The receiving mechanism (3) and the flow rate control mechanism (2) assembled on the top of the receiving mechanism (3); The receiving mechanism (3) includes a vacuum chamber (31), a sealing cover (36) is slidably installed at the front end of the vacuum chamber (31), a limiting sleeve (38) is fixedly installed on the inner wall of the sealing cover (36), a test tube bottle (37) is placed inside the limiting sleeve (38), and a conduit (32) corresponding to the test tube bottle (37) is connected to the top of the vacuum chamber (31). The flow rate control mechanism (2) includes a valve body (21) connected to the front end of the conduit (32). An extraction cylinder (1) is inserted into the top of the valve body (21). A valve core (27) is rotatably installed inside the valve body (21). A flow guide cavity (210) communicating with the conduit (32) is opened inside the valve core (27). A small through hole (211), a medium through hole (212), and a large through hole (213) communicating with the flow guide cavity (210) are respectively opened on the surface of the valve core (27). A throttle (24) is fixedly installed at the front end of the valve core (27).

2. A solid phase extraction device according to claim 1, characterised in that: The inner wall of the sealing cap (36) is fixedly fitted with a support frame (39) for supporting the test tube bottle (37), and the sealing cap (36) is fixed to the vacuum box (31) by a fixing knob (310).

3. The solid phase extraction device of claim 1, wherein: The top of the vacuum chamber (31) is connected to a connecting pipe (33), a pressure gauge (34) is fixedly installed on the top of the connecting pipe (33), and a pressure relief valve (35) is provided on the connecting pipe (33).

4. The solid phase extraction device of claim 1, wherein: The throttle (24) has a sliding hole (28) at its rear end, and a locking pin (25) is slidably installed inside the sliding hole (28).

5. A solid-phase extraction apparatus according to claim 4, characterized in that: The valve body (21) has a locking groove (214) at the front end corresponding to the locking post (25), and a thrust spring (29) is fixedly installed between the locking post (25) and the sliding hole (28).

6. The solid phase extraction device of claim 1, wherein: The surface of the throttle (24) is affixed with an indicator (26), which corresponds to the small through hole (211), the medium through hole (212) and the large through hole (213) respectively.

7. The solid phase extraction device of claim 1, wherein: The top of the valve body (21) is connected to a connecting pipe (23) for the extraction cylinder (1) to be inserted into, and a filter screen (11) is fixedly installed inside the extraction cylinder (1).

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