阅读说明：本技术 一种免拆装的抽滤装置及抽滤方法 (Disassembly-and-assembly-free suction filtration device and suction filtration method ) 是由 王晓艳 徐焕志 高天翔 陈治 于 2019-08-27 设计创作，主要内容包括：一种免拆装的抽滤装置及抽滤方法,旨在解决现有技术中随着抽滤进程的加深,滤膜上积聚固体分离层阻隔液体流动,导致抽滤装置的抽滤效率大幅降低的技术问题。本发明包括抽滤瓶,抽滤瓶的瓶口处设有密封塞,一端与真空泵相连的抽气管的另一端穿过密封塞位于抽滤瓶内部,调压器的一端穿过密封塞位于抽滤瓶内部,调压器的另一端与大气相连,抽滤瓶的瓶身上分别设有靠近瓶口的进液口和靠近瓶底的排液口,与进液口相连的进液管上设有滤膜,进液管的外壁面上设有分离腔,滤膜在传动机构的带动下可在进液管和分离腔的横截面上往复滑动,滤膜远离抽滤瓶的一侧设有储液器,储液器与位于滤膜远离抽滤瓶一侧的进液管导通连接,进液管远离抽滤瓶的一端封闭。(The utility model provides a suction filtration device and suction filtration method of dismouting exempt from, aims at solving among the prior art along with the deepening of suction filtration process, accumulates solid separation layer separation liquid flow on the filter membrane, leads to suction filtration device's suction filtration efficiency to reduce technical problem by a wide margin. The invention comprises a suction bottle, a sealing plug is arranged at the bottle mouth of the suction bottle, the other end of an exhaust pipe with one end connected with a vacuum pump passes through the sealing plug and is positioned inside the suction bottle, one end of a pressure regulator passes through the sealing plug and is positioned inside the suction bottle, the other end of the pressure regulator is connected with the atmosphere, a liquid inlet close to the bottle mouth and a liquid outlet close to the bottle bottom are respectively arranged on the bottle body of the suction bottle, a filter membrane is arranged on a liquid inlet pipe connected with the liquid inlet, a separation cavity is arranged on the outer wall surface of the liquid inlet pipe, the filter membrane can slide on the cross sections of the liquid inlet pipe and the separation cavity in a reciprocating manner under the drive of a transmission mechanism, a liquid reservoir is arranged at one side of the filter membrane far away from the suction bottle, the liquid reservoir is communicated.)

1. A disassembly-and-assembly-free suction filtration device comprises a suction filtration bottle and is characterized in that a sealing plug is arranged at the bottle mouth of the suction filtration bottle, the other end of an exhaust tube, one end of which is connected with a vacuum pump, penetrates through the sealing plug and is positioned inside the suction filtration bottle, one end of a pressure regulator for regulating the air pressure in the suction filtration bottle penetrates through the sealing plug and is positioned inside the suction filtration bottle, the other end of the pressure regulator is connected with the atmosphere, a bottle body of the suction filtration bottle is respectively provided with a liquid inlet close to the bottle mouth and a liquid outlet close to the bottle bottom, a filter membrane for separating solid-liquid mixture is arranged on a liquid inlet tube connected with the liquid inlet tube, a separation cavity for containing solid-liquid separation is arranged on the outer wall surface of the liquid inlet tube, the filter membrane can slide on the cross sections of the liquid inlet tube and the separation cavity in a reciprocating manner under the driving of a transmission mechanism, a liquid reservoir for storing the solid, the end of the liquid inlet pipe far away from the suction bottle is closed.

2. The non-dismantling suction filtration device as claimed in claim 1, wherein the cross section of the liquid inlet pipe is in a shape of a Chinese character hui, first rectangular holes are symmetrically formed in the first pipe wall and the second pipe wall in the width direction of the liquid inlet pipe, the first rectangular holes penetrate through the pipe wall of the air inlet pipe in the thickness direction, and the shape of each first rectangular hole is consistent with the shape of the cross section of the filter membrane.

3. The non-dismantling suction filtration device as claimed in claim 2, wherein the first rectangular hole is located inside the separation chamber having a U-shaped cross section, a second rectangular hole penetrating through the separation chamber in the thickness direction is provided on a wall surface of the separation chamber away from the liquid inlet pipe, the shape of the second rectangular hole is identical to the shape of the cross section of the filter membrane, the second rectangular hole and the first rectangular hole are arranged in a staggered manner in the length direction of the liquid inlet pipe, and the second rectangular hole and the filter membrane are in interference fit.

4. The non-dismantling suction filtration device as claimed in claim 2, wherein the transmission mechanism includes a first roller and a second roller both driven by a motor, both ends of the elongated filter membrane are fixedly connected with the first roller and the second roller, respectively, the first roller is located outside the first tube wall, the second roller is located outside the second tube wall, the length of the filter membrane is much longer than the distance between the first roller and the second roller, and the filter membrane exceeding the distance between the first roller and the second roller when the suction filtration operation is not started is wound on the first roller or the second roller.

5. The non-dismantling suction filtration device as set forth in claim 2, wherein the first rectangular hole is provided on an inner side wall thereof with a sealing layer which is always in close contact with the filter membrane.

6. The suction filtration device free of disassembly and assembly as claimed in claim 1, wherein the liquid inlet and the liquid outlet are diagonally distributed, and the liquid inlet is spaced below the suction pipe and the pressure regulator.

7. The non-dismantling suction filtration device as claimed in claim 1, wherein a latex tube is connected to the liquid outlet, and a water stop clip is connected to the latex tube located outside the suction filtration bottle.

8. The disassembly-free suction filtration device as claimed in claim 1, wherein the pressure regulator comprises a pressure regulating pipe and a pressure regulating valve, the pressure regulating pipe passing through the sealing plug is communicated with the atmosphere and the inside of the suction filtration bottle, and the pressure regulating valve located outside the suction filtration bottle can realize the stopping of the pressure regulating pipe.

9. The non-dismantling suction filtration device as claimed in claim 1, wherein the filter tip of the funnel-shaped reservoir is connected to the liquid inlet pipe, and the reservoir is located between the closed end of the liquid inlet pipe and the filter membrane.

10. The suction filtration method using the non-detachable suction filtration device according to any one of claims 1 to 9, comprising the steps of:

(1) closing the pressure regulating valve to ensure that no gas exchange exists between the interior of the suction filtration bottle and the outside atmosphere, and putting a solid-liquid mixture to be separated into a liquid storage device;

(2) starting a vacuum pump, starting suction filtration operation, driving a first roller and a second roller to rotate in the same direction under the drive of a motor, and sliding a filter membrane on the cross section of a liquid inlet pipe;

(3) and after the suction filtration is finished, closing the vacuum pump, opening the pressure regulating valve, opening the water stop clamp after the air pressure in the suction filtration bottle is consistent with the atmospheric pressure, and enabling the filtrate after the suction filtration to flow out through the liquid outlet under the action of self weight.

Technical Field

The invention relates to the technical field of analytical experiment equipment, in particular to a disassembly-and-assembly-free suction filtration device and a suction filtration method.

Background

The suction filtration, also called decompression filtration and vacuum filtration, refers to a method for achieving solid-liquid separation by reducing the pressure in a suction bottle by using an air pump. The vacuum filtration apparatus commonly used at present generally comprises a buchner funnel, a filtration flask, a filter membrane and a vacuum pump. When carrying out suction filtration operation, join in marriage a haplopore stopper on the buchner funnel, buchner funnel installs in the stopple, the inclined plane of funnel pipe lower extreme is towards the suction nozzle, add a small amount of water or solvent toward filter paper, open tap gently, absorb part air in the suction flask to make filter paper hug closely on the funnel bottom, then open the aspiration pump switch, the air in the suction flask is taken out to the aspiration pump makes pressure in the suction flask be less than the outside atmospheric pressure of bottle, the liquid of waiting to separate solid-liquid mixture in the buchner funnel is in the suction flask, thereby accomplish suction filtration operation. Above-mentioned suction filter device is at the suction filter in-process, is constantly taken out along with filtrating, and the solid laminating in the solid-liquid mixture is gathered in the filter membrane top, and subsequent filtrating all need flow through the solid layer just can be taken out, along with the deepening of suction filter process, gathers the solid layer thickening gradually above the filter membrane, and the extraction efficiency of filtrating reduces by a wide margin, and the required time of whole suction filter process is longer.

Chinese patent with application number CN 201720689208.8 discloses a multiple vacuum filtration device, which is composed of a power line, a power switch, a vacuum pump, a vacuum-resistant connecting pipe, an experiment table, a blow-down valve, a buffer container, a vacuum gauge, a vacuum regulating valve, a vacuum distributor, a filtration bottle fixing frame and a filtration device, wherein the filtration device is composed of a filtration bottle and a glass sand core funnel; the power line is connected with a power supply, and the on and off of the vacuum pump are controlled by a power switch; the vacuum pump is installed at the lower part of the experiment table, the buffer container, the vacuum distributor and the suction bottle fixing frame are installed on the tabletop of the experiment table, the suction filtration device is fixed through the suction bottle fixing frame, the vacuum pump is connected with the buffer container through a vacuum-resistant connecting pipe, the buffer container is connected with the vacuum distributor through a vacuum-resistant connecting pipe, and the vacuum distributor is connected with the suction filtration devices through vacuum-resistant connecting pipes; the bottom of the buffer container is provided with an emptying valve which is used for discharging liquid sucked into the buffer container when the operation is improper; the top of the buffer container is provided with a vacuum regulating valve for regulating the vacuum degree in the suction filtration device; the vacuum meter is installed at the top of the buffer container and used for measuring the vacuum degree in the suction filtration device, and the vacuum meter and the vacuum regulating valve are matched for use to ensure that the vacuum degree in the device is within the bearing range of the suction filtration bottle.

The valves on the branch pipes of the vacuum distributor are arranged, so that corresponding branch pipe valves can be opened conveniently according to the number of samples, other valves which are not used can be closed conveniently, and the suction filtration efficiency of the suction filtration device is improved by increasing the vacuum degree in the suction filtration bottle; however, the above patent fails to solve the problem of the decrease in filtration efficiency caused by the deposition of a large amount of solid separated matter on the filter membrane.

Disclosure of Invention

The invention provides a disassembly-free suction filtration device and a suction filtration method, aiming at overcoming the technical problem that the suction filtration efficiency of the suction filtration device is greatly reduced as the suction filtration process is deepened and a gradually thickened solid separation layer accumulated on a filter membrane blocks liquid flow.

In order to achieve the above object, the present invention adopts the following technical solutions.

A disassembly-free suction filtration device comprises a suction filtration bottle, wherein a bottle mouth of the suction filtration bottle is provided with a sealing plug, the other end of an exhaust tube, one end of which is connected with a vacuum pump, penetrates through the sealing plug and is positioned inside the suction filtration bottle, one end of a pressure regulator for regulating the air pressure in the suction filtration bottle penetrates through the sealing plug and is positioned inside the suction filtration bottle, the other end of the pressure regulator is connected with the atmosphere, a bottle body of the suction filtration bottle is respectively provided with a liquid inlet close to the bottle mouth and a liquid outlet close to the bottle bottom, a liquid inlet tube connected with the liquid inlet is provided with a filter membrane for separating solid-liquid mixture, the outer wall surface of the liquid inlet tube is provided with a separation cavity for containing solid separation, the filter membrane can slide on the cross sections of the liquid inlet tube and the separation cavity in a reciprocating manner under the driving of a transmission mechanism, one side of the filter membrane far away from the suction filtration bottle, the end of the liquid inlet pipe far away from the suction bottle is closed.

In the traditional suction filtration device, solid separators separated by a filter membrane in the suction filtration process are accumulated on the filter membrane, and the suction filtration process is deepened; the solid separator deposited on the filter membrane gradually becomes thick, the filtered filtrate needs to flow through the solid separator layer with higher density, and the efficiency of the suction filtration device is greatly reduced. In the invention, the filter membrane used for separating the solid-liquid mixture on the liquid inlet pipe can slide on the cross section of the liquid inlet pipe under the driving of the transmission mechanism, the phenomenon of accumulation of a large amount of solid separators on the filter membrane contacted with the solid-liquid mixture can not occur, the filter membrane sliding out of the inner pipe of the liquid inlet pipe keeps the solid separators in the separation cavity, and the filter membrane is roughly purified. In the invention, the solid separators on the filter membrane contacted with the solid-liquid mixture to be separated are always kept at a lower deposition amount, the solid separators on the filter membrane hardly influence the liquid flow, and the suction filtration efficiency of the suction filtration device is always kept at a higher level.

Preferably, the cross section of the liquid inlet pipe is in a shape of a Chinese character 'hui', first rectangular holes are symmetrically formed in the first pipe wall and the second pipe wall in the width direction of the liquid inlet pipe, the first rectangular holes penetrate through the pipe wall of the air inlet pipe in the thickness direction, and the shape of each first rectangular hole is consistent with that of the cross section of the filter membrane.

The shape of the first rectangular hole on the first pipe wall and the second pipe wall in the width direction of the liquid inlet pipe is consistent with the shape of the cross section of the filter membrane, the filter membrane can slide on the cross section of the liquid inlet pipe in a reciprocating mode, after the speed of the transmission mechanism is set, the filter membrane slides out of the liquid inlet pipe stably under the driving of the transmission mechanism, and solid sediments on the filter membrane, which are contacted with the solid-liquid mixture and used for separation, are always kept at a low level.

Preferably, the first rectangular hole is located in a separation cavity with a U-shaped cross section, a second rectangular hole penetrating along the thickness direction of the separation cavity is formed in the wall surface, away from the liquid inlet pipe, of the separation cavity, the shape of the second rectangular hole is consistent with that of the cross section of the filter membrane, the second rectangular hole and the first rectangular hole are arranged in a staggered mode along the length direction of the liquid inlet pipe, and the second rectangular hole and the filter membrane are in interference fit.

The technical scheme limits the structure of the separation cavity for accommodating the solid separation object, wherein the first rectangular hole is positioned in the separation cavity with the U-shaped section, and the filter membranes sliding out through the first rectangular hole are required to pass through the second rectangular holes which are arranged on the wall surface of the separation cavity far away from the liquid inlet pipe and run through along the thickness direction of the separation cavity; the filter membrane cleaning device comprises a filter membrane, a first rectangular hole, a second rectangular hole, a filter membrane, a transmission mechanism, a first rectangular hole, a second rectangular hole, a filter membrane and a filter membrane, wherein the first rectangular hole and the second rectangular hole are arranged along the length direction of a liquid inlet pipe in a staggered mode, the second rectangular hole and the filter membrane are in interference fit, when the transmission mechanism drives the filter membrane to slide, solid separators on the filter membrane are mostly blocked by the second rectangular hole and then cannot slide out of a separation cavity along with the filter membrane, and therefore rough cleaning of the filter membrane is achieved, the filter membrane can.

Preferably, the transmission mechanism comprises a first roller and a second roller which are driven by a motor, two ends of the long-strip-shaped filter membrane are fixedly connected with the first roller and the second roller respectively, the first roller is located on the outer side of the first pipe wall, the second roller is located on the outer side of the second pipe wall, the length of the filter membrane is far greater than the distance between the first roller and the second roller, and the filter membrane exceeding the distance between the first roller and the second roller is wound on the first roller or the second roller when the suction filtration operation is not started.

The length of the filter membrane is far greater than the distance between the first roller and the second roller, and the filter membrane exceeding the distance between the first roller and the second roller is wound on the first roller or the second roller when the suction filtration operation is not started; when not beginning suction filtration operation, the filter membrane winding is on first gyro wheel or second gyro wheel, and at the suction filtration in-process, first gyro wheel and second gyro wheel syntropy rotate, and the filter membrane twines on to the gyro wheel of not winding the filter membrane under the initial condition, when needs carry out next suction filtration operation, first gyro wheel and second gyro wheel antiport can.

Preferably, a sealing layer which is always attached to the filter membrane is arranged on the inner side wall of the first rectangular hole.

In order to prevent the liquid from flowing into the separation cavity, a sealing layer which is always tightly attached to the filter membrane is arranged on the inner side wall of the first rectangular hole.

Preferably, the liquid inlet and the liquid outlet are distributed diagonally, and the liquid inlet is positioned below the air extraction pipe and the pressure regulator at intervals.

Because one side of the liquid inlet is connected with a plurality of suction filtration components, if the liquid inlet and the liquid outlet are arranged on the same side, when the suction filtration bottle needs to be tilted to drain filtrate in the suction filtration bottle, the suction filtration components block the suction filtration bottle so that the suction filtration bottle cannot be tilted at a large angle, and the filtrate in the suction filtration bottle cannot be drained; in addition, the inlet interval is located exhaust tube and voltage regulator below to effectively avoided the exhaust tube to inhale the vacuum pump with filtrating.

Preferably, the liquid outlet is connected with a latex tube, and the latex tube positioned on the outer side of the suction bottle is connected with a water stop clip.

The liquid outlet is arranged near the bottom of the suction bottle, when filtrate needs to be discharged, the sealing plug at the bottle mouth of the suction bottle does not need to be pulled out for pouring, and the filtrate can be completely discharged only by opening the water stop clamp and then enabling the suction bottle to incline to one side.

Preferably, the pressure regulator comprises a pressure regulating pipe and a pressure regulating valve, the pressure regulating pipe penetrating through the sealing plug is communicated with the atmosphere and the interior of the filter flask, and the pressure regulating valve positioned on the outer side of the filter flask can realize the stopping of the pressure regulating pipe.

When the suction filtration operation is finished, the air pressure in the suction filtration bottle is smaller than the atmospheric pressure, at the moment, if the water stop clamp is directly opened for liquid drainage operation, the filtrate flows out of the part under the action of the self weight, and when the self weight of the filtrate is consistent with the internal and external pressure difference along with the reduction of the height of the filtrate page, the filtrate cannot be continuously discharged; in the invention, the pressure regulator comprises a pressure regulating pipe and a pressure regulating valve, the pressure regulating pipe penetrating through the sealing plug is communicated with the atmosphere and the inside of the filter flask, and the pressure regulating valve positioned on the outer side of the filter flask can realize the stopping of the pressure regulating pipe; after the suction filtration is finished, the pressure regulating valve is opened, and when the air pressure in the suction filtration bottle is consistent with the atmospheric pressure, the water stop clamp is opened to completely discharge the filtrate in the suction filtration bottle.

Preferably, the filter tip that is hopper-shaped reservoir is through connection with the feed liquor pipe, and the reservoir is located between the blind end and the filter membrane of feed liquor pipe.

In the invention, a filter tip of a funnel-shaped liquid accumulator is communicated with a liquid inlet pipe, and the liquid accumulator is positioned between the closed end of the liquid inlet pipe and a filter membrane; if the two times of suction filtration are needed, a filter membrane is additionally arranged in the funnel-shaped liquid storage device.

A suction filtration method using the disassembly-free suction filtration device comprises the following steps:

(1) closing the pressure regulating valve to ensure that no gas exchange exists between the interior of the suction filtration bottle and the outside atmosphere, and putting a solid-liquid mixture to be separated into a liquid storage device;

(2) starting a vacuum pump, starting suction filtration operation, driving a first roller and a second roller to rotate in the same direction under the drive of a motor, and sliding a filter membrane on the cross section of a liquid inlet pipe;

(3) and after the suction filtration is finished, closing the vacuum pump, opening the pressure regulating valve, opening the water stop clamp after the air pressure in the suction filtration bottle is consistent with the atmospheric pressure, and enabling the filtrate after the suction filtration to flow out through the liquid outlet under the action of self weight.

In conclusion, the invention has the following beneficial effects: (1) the filter membrane of the suction filtration device is driven by the transmission mechanism to continuously move, solid separators on the filter membrane are accumulated in the separation cavity, the solid separators on the filter membrane which are in contact with a solid-liquid mixture to be separated are always kept at a lower deposition amount, the solid separators on the filter membrane hardly influence the liquid flow, and the suction filtration efficiency of the suction filtration device is always kept at a higher level; (2) after the suction filtration is finished, the pressure regulator can balance the air pressure inside and outside the suction filtration bottle, filtrate can be discharged through a liquid outlet near the bottom of the bottle, the required suction filtration device does not need to be frequently disassembled and assembled, and the air tightness of the device is good; (3) and (4) adding a filter membrane into the funnel-shaped liquid storage device to perform secondary suction filtration.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a different label of the same schematic as fig. 1.

In the figure:

1. the filter flask comprises a filter flask body, a bottle opening, a bottle body, a bottle bottom, a bottle body, a sealing plug, a vacuum pump, a pumping pipe, a pressure regulator, a pressure regulating pipe, a pressure regulating valve, a 5b, a pressure regulating valve, a liquid inlet, a 7, a liquid discharge port, a liquid inlet pipe, a 8a pipe wall, a first pipe wall, a 8b pipe wall, a second pipe wall, a 8c pipe wall, a closed end, a 9, a filter membrane, a 10 separating cavity, a 11, a transmission mechanism, a 11a, a first roller, a 11b, a second roller, a 12, a liquid storage device, a 12a filter tip, a 13, a first rectangular hole, a 14, a second rectangular hole, a 15, a sealing layer, a 16, a latex pipe, a 17 and a water stop.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.