Seawater sample suction filtration device

Abstract

The utility model belongs to the technical field of experimental instruments and equipment, and provides a seawater sample suction filtration device which comprises a machine main body provided with a rotatable bearing disc, and a sample feeding mechanism, a sealing filtration mechanism and a sample discharging mechanism which are arranged in the machine main body, the bearing disc is provided with a plurality of filter membrane placing holes which are distributed at intervals in the circumferential direction, and the filter sealing mechanism comprises filter membrane units which are detachably arranged at the filter membrane placing holes, a jacking sealing cover which is arranged above the filter membrane units in a liftable manner, and a bottom support sealing seat which is arranged below the filter membrane units in a liftable manner; the top pressure sealing cover is communicated with the sample feeding mechanism, and the bottom support sealing seat is communicated with the sample discharging mechanism. The seawater sample suction filtration device provided by the utility model is simple in structure and convenient to use, the replacement difficulty of the filter membrane is reduced, the rapid, efficient and stable replacement of the filter membrane is realized, meanwhile, a seawater sample solution does not need to be manually transferred, and the seawater sample filtration treatment efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of experimental instrument and equipment technology, and specifically relates to a seawater sample filtration device. Background Technology

[0002] Marine ecological environment monitoring typically requires seawater sample collection and filtration. Currently, the equipment used for seawater sample filtration generally consists of a filtration container with a filter membrane, a filtration buffer bottle, and a vacuum pump. However, in practice, manual assembly and connection are often required on-site, which is time-consuming and labor-intensive, significantly impacting the efficiency of seawater sample collection. Furthermore, the filter membrane is prone to clogging during seawater sample filtration, necessitating frequent replacements to maintain filtration effectiveness. Additionally, different seawater samples have different filtration requirements, necessitating the selection of filter membranes with varying pore sizes. However, existing filtration equipment involves complex membrane replacement procedures, is difficult to operate, and often requires transferring the seawater sample solution within the filtration container, severely affecting the efficiency of seawater sample filtration.

[0003] Therefore, it is necessary to design a seawater sample filtration device that can at least solve some of the above problems and defects. Summary of the Invention

[0004] To solve the above technical problems, this utility model proposes a seawater sample filtration device with a simple structure and convenient use. It reduces the difficulty of replacing the filter membrane, realizes rapid, efficient and stable replacement of the filter membrane, and eliminates the need for manual transfer of seawater sample solution, thereby improving the efficiency of seawater sample filtration.

[0005] The technical solution of this utility model is:

[0006] This utility model proposes a seawater sample filtration device, including a main body with a rotatable support tray, and a sample feeding mechanism, a sealing and filtering mechanism and a sample discharging mechanism disposed inside the main body.

[0007] The tray is provided with a plurality of filter membrane placement holes spaced apart along the circumference. The sealing mechanism includes a detachable filter membrane unit located at the filter membrane placement hole, a liftable top pressure cover located above the filter membrane unit, and a liftable bottom support seat located below the filter membrane unit. The top pressure cover is connected to the sample inlet mechanism, and the bottom support seat is connected to the sample outlet mechanism.

[0008] Preferably, the filter membrane unit includes a ring support adapted to the filter membrane placement hole, and a filter membrane fixedly disposed in the inner ring of the ring support;

[0009] The top pressure cap is in sealing contact with the upper end face of the ring support, and the bottom support is in sealing contact with the lower end face of the ring support.

[0010] Preferably, the inner wall of the filter membrane placement hole is provided with an inwardly extending annular protrusion, and the annular support is provided with an annular groove adapted to the annular protrusion. (The annular protrusion and / or the annular support is made of soft rubber material, and the cross-section of the annular protrusion and the annular groove is an isosceles trapezoid or an isosceles triangle to improve the stability of the annular support placed in the filter membrane placement hole and prevent it from easily detaching and falling off.)

[0011] Preferably, the sealing and filtration mechanism further includes a lifting motor fixedly installed inside the machine body, and the output shaft of the lifting motor is parallel to the axis of the filter membrane placement hole;

[0012] The top pressure cover is provided with a top support arm sleeved on the outer periphery of the output shaft of the lifting motor, and the bottom support seat is provided with a bottom support arm sleeved on the outer periphery of the output shaft of the lifting motor. Both the top support arm and the bottom support arm are threadedly connected to the output shaft of the lifting motor, and their spiral directions are opposite.

[0013] Preferably, the sealing and filtering mechanism further includes a limiting plate fixedly connected to the machine body, the limiting plate being located between the lifting motor and the support tray;

[0014] The limiting plate is provided with an upper slot hole adapted to the top support arm and a lower slot hole adapted to the bottom support arm. The top support arm is vertically and can be inserted into the upper slot hole, and the bottom support arm is vertically and can be inserted into the lower slot hole.

[0015] Preferably, the injection mechanism includes an injection cylinder connected to the top pressure cap via an injection pipe, and an injection pump installed on the injection pipe;

[0016] The sampling mechanism includes a sample storage cylinder connected to the bottom support seat via a sampling pipe, and a negative pressure pump installed on the sampling pipe.

[0017] This utility model has the following advantages and effects compared with the prior art:

[0018] (1) A rotatable support tray is used on the main body of the machine, and the support tray is provided with several filter membrane placement holes spaced apart, so as to set several filter membranes for vacuum filtration on the support tray, thereby reducing the difficulty of replacing the filter membrane during the vacuum filtration process, improving the convenience of filter membrane replacement, and thus improving the efficiency of seawater sample vacuum filtration.

[0019] (2) A detachable filter membrane unit is used at the filter membrane placement hole, and a top pressure cap and a bottom support seat are raised and lowered. During the filtration process, the top pressure cap and the bottom support seat press against the upper and lower sides of the filter membrane unit to achieve sealing. This allows the seawater sample to flow to the filter membrane unit through the sample inlet mechanism connected to the top pressure cap to complete the filtration. Finally, the sample is collected through the sample outlet mechanism connected to the bottom support seat. The method is simple and convenient to use.

[0020] (3) A filter membrane unit including a ring support and a filter membrane fixedly installed in the inner ring of the ring support is adopted. The ring support is detachably snapped into the filter membrane placement hole, which makes it easy to replace the corresponding filter membrane in a timely and quick manner according to the needs of seawater sample filtration and treatment, thus improving the convenience of operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the seawater sample filtration device in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the seawater sample filtration device in an embodiment of the present invention;

[0023] Figure 3 This is a partial structural schematic diagram of the seawater sample filtration device in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the filter membrane unit in the seawater sample filtration device in this embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of another part of the structure of the seawater sample filtration device in this embodiment of the present invention.

[0026] Reference numerals in the attached drawings: 1. Main body of the machine; 2. Support tray; 21. Filter membrane placement hole; 211. Ring protrusion; 3. Filter sealing mechanism; 31. Filter membrane unit; 311. Ring support seat; 3111. Ring groove; 312. Filter membrane; 32. Top pressure cover; 321. Top support arm; 33. Bottom support seat; 331. Bottom support arm; 34. Lifting motor; 35. Limiting plate; 351. Upper groove hole; 352. Lower groove hole; 4. Sample inlet cylinder; 5. Sample inlet pipe; 6. Sample storage cylinder; 7. Sample outlet pipe. Detailed Implementation

[0027] To enable those skilled in the art to better understand this utility model, it will now be further described in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0028] Example:

[0029] like Figures 1-5 As shown, this utility model provides a seawater sample filtration device, including a main body 1 with a rotatable support tray 2, and a sample feeding mechanism, a sealing filter mechanism 3 and a sample discharging mechanism fixedly installed inside the main body 1; wherein, the support tray 2 is driven to rotate by a rotating motor (not shown in the figure) fixedly installed inside the main body 1. Since the rotating motor is a mature existing technology in this field, its specific structure and principle will not be described here.

[0030] Combination Figure 1 and Figure 3 The tray 2 is provided with a plurality of filter membrane placement holes 21 evenly spaced along the circumference. The sealing mechanism 3 includes a detachable filter membrane unit 31 located at the filter membrane placement hole 21, a liftable top pressure cover 32 located above the filter membrane unit 31, and a liftable bottom support 33 located below the filter membrane unit 31. The top pressure cover 32 is connected to the sample inlet mechanism, and the bottom support 33 is connected to the sample outlet mechanism. During the filtration process, the tray 2 rotates so that the filter membrane unit 31 placed at its filter membrane placement hole 21 is aligned with the top pressure cover 32 and the bottom support cover 33 (the central axes of the three coincide). Then, the top pressure cover 32 moves downward to seal against the top of the filter membrane unit 31, and the bottom support cover 33 moves upward to seal against the bottom of the filter membrane unit 31, forming a closed filtration space. When filtration is completed or when it is necessary to pause to replace the filter membrane, the top pressure cover 32 moves upward to disengage from the filter membrane unit 31, the bottom support cover 33 moves downward to disengage from the filter membrane unit 31, and the tray 2 rotates to switch the filter membrane unit 31 of the adjacent filter membrane placement hole 21.

[0031] For details, please refer to Figure 4 and Figure 5 As shown, the filter membrane unit 31 includes a ring support 311 adapted to the filter membrane placement hole 21, and a filter membrane 312 fixedly disposed within the inner ring of the ring support 311. During the vacuum filtration process, the top pressure cap 32 seals against the upper end face of the ring support 311, and the bottom support cap 33 seals against the lower end face of the ring support 311. It should be noted that, to ensure tightness of the seal, soft sealing gaskets are provided on the lower end face of the top pressure cap 32, the upper end face of the bottom support cap 33, and the upper and lower end faces of the ring support 311 to prevent leakage during the vacuum filtration process and improve the effect of negative pressure suction filtration.

[0032] Furthermore, the inner wall of the filter membrane placement hole 21 is provided with an inwardly extending annular protrusion 211, and the annular support 311 is provided with an annular groove 3111 that matches the annular protrusion 211, so that the annular support 311 is stably embedded in the filter membrane placement hole 21. Optionally, in some embodiments, both the annular protrusion 211 and the annular support 311 are made of soft rubber material, and the cross-section of the annular protrusion 211 and the annular groove 3111 is an isosceles trapezoid or an isosceles triangle, so as to improve the stability of the annular support 311 placed in the filter membrane placement hole 21 and prevent it from easily falling off.

[0033] Further reference Figure 3 As shown, the sealing and filtration mechanism 3 also includes a lifting motor 34 fixedly installed inside the main body 1. The output shaft of the lifting motor 34 is parallel to the axis of the filter membrane placement hole 21. The top pressure cover 32 is provided with a top support arm 321 sleeved on the outer periphery of the output shaft of the lifting motor 34, and the bottom support cover 33 is provided with a bottom support arm 331 sleeved on the outer periphery of the output shaft of the lifting motor 34. Both the top support arm 321 and the bottom support arm 331 are threadedly connected to the output shaft of the lifting motor 34, and their spiral directions are opposite, so that during the forward rotation of the output shaft of the lifting motor 34, the screws are threadedly connected to it. The threaded top support arm 321 drives the top pressure cover 32 to move downward, and the threaded bottom support arm 331 drives the bottom support seat 33 to move upward. That is, the top pressure cover 32 and the bottom support seat 33 move towards each other in the direction of approaching the ring support seat 311. When the output shaft of the lifting motor 34 rotates in the opposite direction, the threaded top support arm 321 drives the top pressure cover 32 to move upward, and the threaded bottom support arm 331 drives the bottom support seat 33 to move downward. That is, the top pressure cover 32 and the bottom support seat 33 move away from the ring support seat 311.

[0034] Furthermore, in combination Figure 3 and Figure 5 As shown, the sealing filter mechanism 3 also includes a limiting plate 35 fixedly connected to the main body 1. The limiting plate 35 is located between the lifting motor 34 and the support tray 2. The limiting plate 35 is provided with an upper slot hole 351 that matches the top support arm 321 and a lower slot hole 352 that matches the bottom support arm 331. The top support arm 321 can be lifted and lowered through the upper slot hole 351, and the bottom support arm 331 can be lifted and lowered through the lower slot hole 352, so that the top support arm 321 and the bottom support arm 331 can only move vertically under the limiting action of the upper slot hole 351 and the lower slot hole 352, and will not deviate in the horizontal direction. This ensures that the top pressure sealing cover 32 and the bottom support sealing seat 33 are always coaxially arranged with the filter membrane placement hole 21 and the ring support seat 311 of the support tray 2.

[0035] like Figure 2 and Figure 5As shown, the sample injection mechanism includes a sample injection cylinder 4 connected to the top pressure cap 32 via a sample injection pipe 5, and a sample injection pump (not shown in the figure) mounted on the sample injection pipe 5; the sample discharge mechanism includes a sample storage cylinder 6 connected to the bottom support seat 33 via a sample discharge pipe 7, and a negative pressure pump (not shown in the figure) mounted on the sample discharge pipe 7. It should be noted that both the sample injection pipe 5 and the sample discharge pipe 7 are flexible and extendable rubber tubing. Given that this is mature existing technology, the overall length and connection relationship of the sample injection pipe 5 and the sample discharge pipe 7 are not shown in the figure; only a portion is shown for illustration. Furthermore, the structure and principle of the mature sample injection pump and negative pressure pump in this field will not be elaborated here.

[0036] In summary, the seawater sample filtration device provided by this utility model has a simple structure and is easy to use, reduces the difficulty of replacing the filter membrane, and achieves rapid, efficient and stable replacement of the filter membrane. At the same time, it eliminates the need for manual transfer of seawater sample solution, thereby improving the efficiency of seawater sample filtration.

[0037] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A seawater sample filtration device, characterized in that: It includes a main body (1) with a rotatable support tray (2), and a sample inlet mechanism, a filter sealing mechanism (3) and a sample outlet mechanism disposed inside the main body (1); The tray (2) is provided with a plurality of filter membrane placement holes (21) spaced apart along the circumferential direction. The sealing mechanism (3) includes a detachable filter membrane unit (31) located at the filter membrane placement hole (21), a top pressure cover (32) that can be raised and lowered located above the filter membrane unit (31), and a bottom support seat (33) that can be raised and lowered located below the filter membrane unit (31). The top pressure cover (32) is connected to the sample injection mechanism, and the bottom support seat (33) is connected to the sample dispensing mechanism.

2. The seawater sample filtration device according to claim 1, characterized in that: The filter membrane unit (31) includes a ring support (311) adapted to the filter membrane placement hole (21), and a filter membrane (312) fixedly disposed in the inner ring of the ring support (311). The top pressure cover (32) is in sealed contact with the upper end face of the ring support (311), and the bottom support cover (33) is in sealed contact with the lower end face of the ring support (311).

3. The seawater sample filtration device according to claim 2, characterized in that: The inner wall of the filter membrane placement hole (21) is provided with an inwardly extending annular protrusion (211), and the annular support (311) is provided with an annular groove (3111) that matches the annular protrusion (211).

4. The seawater sample filtration device according to claim 1, characterized in that: The sealing filter mechanism (3) also includes a lifting motor (34) fixedly installed inside the machine body (1), and the output shaft of the lifting motor (34) is parallel to the axis of the filter membrane placement hole (21); The top pressure cover (32) is provided with a top support arm (321) sleeved on the outer periphery of the output shaft of the lifting motor (34), and the bottom support cover (33) is provided with a bottom support arm (331) sleeved on the outer periphery of the output shaft of the lifting motor (34). The top support arm (321) and the bottom support arm (331) are both threadedly connected to the output shaft of the lifting motor (34), and the spiral directions of the two are opposite.

5. The seawater sample filtration device according to claim 4, characterized in that: The sealing and filtering mechanism (3) also includes a limiting plate (35) fixedly connected to the main body (1), and the limiting plate (35) is located between the lifting motor (34) and the support tray (2); The limiting plate (35) is provided with an upper slot (351) adapted to the top support arm (321) and a lower slot (352) adapted to the bottom support arm (331). The top support arm (321) is vertically and can be inserted into the upper slot (351), and the bottom support arm (331) is vertically and can be inserted into the lower slot (352).

6. The seawater sample filtration device according to claim 1, characterized in that: The injection mechanism includes an injection cylinder (4) connected to the top pressure cap (32) via an injection pipe (5), and an injection pump installed on the injection pipe (5); The sampling mechanism includes a sample storage cylinder (6) connected to the bottom support seat (33) via a sampling pipe (7) and a negative pressure pump installed on the sampling pipe (7).

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