Suction filtration connecting and fixing device

Abstract

The utility model provides a suction filtration connecting and fixing device which comprises two annular main bodies, and the two annular main bodies are overlapped up and down in a separable and combinable manner; the inner diameter of the first annular main body is matched with the caliber of the lower part of the cylindrical glass funnel so as to be hermetically jointed with the cylindrical glass funnel, and the inner diameter of the second annular main body is matched with the caliber of the upper part of the sand core filter so as to be hermetically jointed with the sand core filter; a sand core piece is arranged in an inner hole of the second annular body, and filter paper is laid on the upper surface of the sand core piece. The two side portions of the first annular body and the two side portions of the second annular body are each provided with a connecting structure, and the two annular bodies are detachably locked together through the connecting structures. The sealing connection between the sand core filter and the cylindrical glass funnel is realized, and the sand core filter and the cylindrical glass funnel can be conveniently and repeatedly disassembled without disassembling the aluminum alloy clamp.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory instrument and equipment, and particularly relates to a suction filtration connection and fixing device. Background Art

[0002] A suction filtration device is a commonly used laboratory instrument for operations such as sample preparation, separation of solid-liquid mixtures, removal of suspended matter, and purification of solutions. It usually consists of a suction flask, filter paper or filter membrane, a vacuum pump, etc. The main function of the suction filtration device is to filter and separate solid particles or other impurities in the liquid through the filter paper or filter membrane to obtain a relatively pure liquid. In addition, the suction filtration device can also be used in fields such as water quality monitoring and environmental monitoring. In water quality monitoring, the suction filtration device can be used to filter out suspended matter in the water sample for subsequent analysis and testing.

[0003] A sintered glass filter is a commonly used glassware for filtration in the laboratory. Using materials such as quartz sand, activated carbon, and resin as the filtration medium, it can effectively remove impurities such as suspended matter, foreign colors, organic matter, and microorganisms in water, making the water quality reach a certain purity level. The sintered glass filter is usually cylindrical in shape, with a thin neck on the side, which is connected to the vacuum pump through the thin neck. The vacuum pump provides the suction force for filtration. Filter paper is placed at the upper opening of the sintered glass filter, and a cylindrical glass funnel is connected above the filter paper. The cylindrical base at the bottom of the sintered glass filter is sleeved into the mouth of a standard stopper conical flask.

[0004] The existing sintered glass filter and the cylindrical glass funnel are connected by an aluminum alloy clip. At the end of each suction filtration, the clip needs to be removed, and when performing suction filtration again, the aluminum alloy clip needs to be clipped on. The connection between the sintered glass filter and the cylindrical glass funnel needs to be sealed repeatedly, and the operation is cumbersome. Moreover, the sintered glass filter and the cylindrical glass funnel are prone to sliding, so that the sandpaper, the cylindrical glass funnel, and the sintered glass filter cannot be strictly aligned, resulting in poor sealing and waste water leakage, which reduces the experimental efficiency. Summary of the Utility Model

[0005] In view of the above existing technical problems, the utility model provides a suction filtration connection and fixing device, which realizes the sealed connection between the sintered glass filter and the cylindrical glass funnel, and is convenient for repeated disassembly without the need to disassemble the aluminum alloy clip.

[0006] The technical solution adopted by the present utility model is as follows: A suction filtration connection and fixing device, characterized in that it includes two annular bodies, and the two annular bodies are superposed up and down in a separable manner; the inner diameter of the first annular body is adapted to the lower diameter of the cylindrical glass funnel to hermetically engage the cylindrical glass funnel, and the inner diameter of the second annular body is adapted to the diameter above the sand core filter to hermetically engage the sand core filter; a sand chip is arranged in the inner hole of the second annular body, and a filter paper is laid on the upper surface of the sand chip; connecting structures are arranged on both side parts of the first annular body and the second annular body, and the connecting structures lock the two annular bodies together detachably.

[0007] Specifically, on the same side of the first annular body and the second annular body, a connecting part protrudes laterally; a tenon is arranged on the surface of the connecting part of the first annular body, and a mortise is arranged on the surface of the connecting part of the second annular body. When the two annular bodies are superposed, the tenon and the mortise are buckled together; alternatively, a mortise is arranged on the surface of the connecting part of the first annular body, and a tenon is arranged on the surface of the connecting part of the second annular body. When the two annular bodies are superposed, the tenon and the mortise are buckled together. That is, the connecting parts of the first annular body and the second annular body are detachably clamped together through tenon and mortise buckling.

[0008] The connecting parts of the two annular bodies are also combined together through an annular connecting piece that penetrates the two connecting parts in the thickness direction. The annular connecting piece is a connecting ring with a pressing handle. The connecting ring is formed by buckling two parts of the ring together, and one part of the ring is telescopic. By operating the pressing handle, the telescopic part of the ring can extend to close the connecting ring or retract to make the connecting ring form an opening.

[0009] The opposite sides of the sides of the two annular bodies where the connecting parts are formed are detachably connected through an annular snap. Specifically, the annular snap is composed of two arc-shaped rings hinged together. The unhinged end of one arc-shaped ring is fixedly connected to the surface of the first annular body or the second annular body, and the unhinged end of the other arc-shaped ring forms a hook, and the hook is detachably buckled on the second annular body or the first annular body.

[0010] Furthermore, the mutually contacting surfaces of the first annular body and the second annular body are set as frosted surfaces.

[0011] The advantages of the technical solution of the present utility model are as follows: The cylindrical glass funnel and the sand core filter are hermetically engaged through the first annular body and the second annular body respectively, and the cylindrical glass funnel can be hermetically fixed on the sand core filter without sliding. It is convenient to disassemble, and it is also convenient to achieve sealing during combination, and there is no need to repeatedly disassemble the aluminum alloy clips. Description of the Drawings

[0012] Figure 1It is a schematic diagram of the overall structure of the suction filtration connection and fixing device of the present utility model;

[0013] Figure 2 It is a top view of the annular connection component of the suction filtration connection and fixing device of the present utility model;

[0014] Figure 3 It is a structural view when the annular connection component of the present utility model is closed;

[0015] Figure 4 It is a structural view when the annular connection component of the present utility model is opened;

[0016] Figure 5 It is a schematic diagram of the structure of the annular snap of the annular connection component of the present utility model;

[0017] Figure 6 It is a schematic diagram of the state when the annular connecting piece of the present utility model is closed;

[0018] Figure 7 It is a schematic diagram of the state when the annular connecting piece of the present utility model is opened;

[0019] In the figure: 1. Cylindrical glass funnel, 2. Annular connecting piece, 3. Tenon and mortise buckle, 4. Annular snap, 5. Sand core filter, 6. Standard plug Erlenmeyer flask, 7. Sand chip;

[0020] 21. Press handle; 31. Tenon, 32. Mortise; 41. Hook, 42. Hook mating part, 43. Pin, 44. Screw. Detailed implementation manners

[0021] Next, the device in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the patent of the present utility model. Obviously, the described embodiments are only partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly. In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0023] See Figure 1 , which is a schematic view of the overall structure of the suction filtration connection and fixing device of the present utility model, showing the position where the suction filtration connection and fixing device in the laboratory is installed. A sand core filter 5 is installed on the upper part of the stoppered Erlenmeyer flask 6. The thin neck extending from the side of the sand core filter 5 is used to connect to a vacuum pump to form a suction force inside the sand core filter 5. A cylindrical glass funnel 1 is installed above the sand core filter 5. A suction filtration connection and fixing device is installed between the cylindrical glass funnel 1 and the sand core filter 5 to seal and relatively fix the cylindrical glass funnel 1 and the sand core filter 5 together.

[0024] Figure 2 is a top view of the annular connection assembly of the suction filtration connection and fixing device of the present utility model, Figure 3 is a structural view of the annular connection assembly when it is closed in the present utility model, Figure 4 is a structural view of the annular connection assembly when it is open in the present utility model; See Figures 2 - 4 , the main structure of the suction filtration fixing connection device is two annular bodies that overlap vertically. One side of each of the two annular bodies protrudes laterally to form a connection part, and a mortise and tenon buckle 3 is provided on the connection part. Specifically, a tenon 31 is provided on the surface of the connection part of one annular body, and a mortise 32 is provided on the surface of the connection part of the other annular body. When the two annular bodies are stacked, the tenon 31 and the mortise 32 are buckled together to prevent the two annular bodies from sliding relative to each other and being misaligned.

[0025] See Figure 4 , the connection parts of the two annular bodies are also combined together by an annular connecting piece 2. The annular connecting piece 2 is a connecting ring with a pressing handle 21. The connecting ring penetrates the two connection parts longitudinally, and its overall structure is similar to that of a key ring lock. See Figure 6 、 Figure 7, which shows a specific embodiment of the annular connecting member 2. The ring body of the annular connecting member 2 is pin-connected to the pressing handle 21, and a torsion spring is arranged on the pin-connected shaft to provide an elastic force for driving the pressing handle 21 and the ring body to be buckled into a circle. Press the pressing handle 21, and the annular connecting member 2 is opened into Figure 7 the state shown in the figure. It passes through the arc-shaped through holes on the two annular main bodies of the suction filtration fixing connection device in sequence through the open end, so as to connect the two annular main bodies together. In order to adapt to the annular radian of the annular connecting member 2, the adapted through holes at the connecting parts on the two annular main bodies can be set as arc-shaped through holes, so that the annular annular connecting member 2 can pass through the two annular main bodies without hindrance, that is, the annular connecting member 2 can slide in the arc-shaped through holes of the two annular main bodies, so that the two annular main bodies can be mutually attached or separated from each other.

[0026] The inner diameter of the upper annular main body is adapted to the caliber of the lower part of the cylindrical glass funnel 1, and the inner diameter of the lower annular main body is adapted to the caliber above the sand core filter 5. Generally, the inner diameters of the upper and lower annular main bodies are the same. A sand chip 7 is arranged at the inner diameter of the lower annular main body. A filter paper is laid on the upper surface of the sand chip 7, and the joint surfaces of the two annular main bodies are frosted to enhance the sealing performance.

[0027] See Figure 3 , the other sides of the two annular main bodies opposite to the side where the connection part is arranged are detachably connected through the annular snap 4, Figure 5 which is a schematic structural diagram of the annular snap of the annular connection assembly in the present utility model. As shown in the figure, the annular snap 4 is composed of two arc-shaped rings made of rigid materials. One end parts of the two arc-shaped rings are hinged together through a pin 43. The lower end part of the lower arc-shaped ring is fixed on the lower surface of the lower annular main body through a screw 44. The upper end part of the upper arc-shaped ring is set as a hook 41. A hook matching part 42 matched with the hook 41 is opened on the upper surface of the upper annular main body. When the hook 41 is inserted into the hook matching part 42, the annular snap 4 locks the side parts of the two annular main bodies together.

[0028] The above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A suction filtration connection and fixation device, characterized in that, It includes two annular bodies which can be separated and overlapped vertically; the inner diameter of the first annular body is adapted to the lower caliber of the cylindrical glass funnel to seal and engage the cylindrical glass funnel, and the inner diameter of the second annular body is adapted to the caliber above the sand core filter to seal and engage the sand core filter; a sand chip is arranged in the inner hole of the second annular body, and a filter paper is laid on the upper surface of the sand chip. Connection structures are arranged on both side parts of the first annular body and the second annular body, and the connection structures lock the two annular bodies together detachably.

2. The suction filtration connection and fixing device according to claim 1, characterized in that, Connection parts are laterally protruded on the same side parts of the first annular body and the second annular body. A tenon is arranged on the surface of the connection part of the first annular body, and a mortise is arranged on the surface of the connection part of the second annular body. When the two annular bodies are overlapped, the tenon and the mortise are buckled together; alternatively, a mortise is arranged on the surface of the connection part of the first annular body, and a tenon is arranged on the surface of the connection part of the second annular body. When the two annular bodies are overlapped, the tenon and the mortise are buckled together.

3. The suction filtration connection and fixing device according to claim 1 or 2, characterized in that, The connection parts of the two annular bodies are also combined together through an annular connecting piece that penetrates through the two connection parts in the thickness direction, and the annular connecting piece is a connecting ring with a pressing handle.

4. The suction filtration connection and fixing device according to claim 3, characterized in that, The opposite sides of the side parts of the two annular bodies where the connection parts are formed are detachably connected through an annular snap fastener.

5. The suction filtration connection and fixing device according to claim 4, characterized in that, The annular snap fastener is composed of two arc-shaped rings hinged together. The unhinged end of one arc-shaped ring is fixedly connected to the surface of the first annular body or the second annular body, and the unhinged end of the other arc-shaped ring forms a hook, and the hook is detachably buckled on the second annular body or the first annular body.

6. The suction filtration connection and fixing device according to claim 1, characterized in that, The mutually contacting surfaces of the first annular body and the second annular body are set as frosted surfaces.

7. The suction filtration connection and fixing device according to claim 3, characterized in that, The connecting ring is formed by buckling two parts of rings together, and one part of the ring is telescopic. By operating the pressing handle, the telescopic part of the ring can extend to close the connecting ring or retract to make the connecting ring form an opening.

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