CN204768281U - Tubular filter - Google Patents

Abstract

The utility model discloses a tubular filter, which comprises an upper cup used for containing liquid to be filtered and a filter head installed at the bottom of the upper cup for filtering; the filter head includes a filter part and a connecting head; the filtered The part includes a filter cavity containing the filter membrane and a liquid outlet at the bottom of the filter cavity, the filter cavity communicates with the bottom of the upper cup; The liquid outlet pipe extending downward, and the air pressure chamber that communicates with the liquid outlet pipe and the filter cavity is formed between the outer casing and the liquid outlet pipe; the side wall of the outer casing is provided with a nozzle that communicates with the air pressure chamber and is used to connect with an external suction filter device The tubular filter also includes a feeding tube, the upper end of the feeding tube is sleeved in the outer sleeve, and the lower end of the feeding tube is provided with a drainage part communicated with the feeding tube, and the drainage part is connected to the feeding tube by the feeding tube. The diameter of the lower pipe is gradually reduced, and the bottom of the drainage part is provided with a liquid outlet. The tubular filter described in the utility model is suitable for the use of tubular collectors and has high filtering efficiency.

Description

a tube filter

technical field

The utility model relates to a filter device in biological cell tissue culture, in particular to a tubular filter.

Background technique

During the sterile filtration of chemicals, pharmaceuticals, tissue culture fluids, and other laboratory fluid solutions, filtration processes are usually used to remove impurities or remove adherent cells. In the filtration process of cell fluid, the traditional filtration method is to directly use cell filter sieves for manual operation. Careless operation of this filtration method will lead to contamination of cells. Not only that, it is difficult to aseptically collect the filtered cells.

In order to solve the problem of aseptic collection of cells, a vacuum filter is used for filtration instead of traditional mesh filtration. Existing vacuum filters are all used in conjunction with collection bottles, and there is no filter that can be used in conjunction with centrifuge tubes at present.

Utility model content

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a tubular filter, which is suitable for the use of tubular collectors such as centrifuge tubes, and improves the filtration efficiency.

In order to solve the above problems, the technical scheme adopted in the utility model is as follows:

A tubular filter, comprising an upper cup for containing liquid to be filtered and a filter head installed at the bottom of the upper cup for filtering; the filter head includes a filter part and a connecting head; the filter part includes a filter membrane The filter cavity and the liquid outlet at the bottom of the filter cavity communicate with the bottom of the upper cup; the connection head includes an outer casing extending downward from the periphery of the filter part and a liquid outlet extending downward from the liquid outlet Tube, the outer casing and the liquid outlet pipe form an air pressure chamber that communicates with the liquid outlet pipe and the filter chamber; the side wall of the outer casing is provided with a nozzle that communicates with the air pressure chamber and is used to connect with an external suction filter device; the tubular filter The device also includes a feeding tube, the upper end of the feeding tube is sleeved in the outer casing, and the lower end of the feeding tube is provided with a drainage part communicating with the feeding tube, and the diameter of the drainage part is gradually reduced from the feeding tube down. , the bottom of the drainage part is provided with a liquid outlet.

Further, the outer circumference of the bottom of the upper cup described in the utility model is provided with an annular groove, and the outer peripheral wall of the filter cavity is provided with an annular protrusion matching the annular groove, and the upper cup and the filter head pass through the annular protrusion The interference fit with the annular groove is interlocked with each other.

Further, the mouth of the upper cup described in the present invention is provided with a lid, and the lid is fastened to the mouth of the upper cup.

Further, the outer wall of the delivery pipe described in the utility model is provided with an external thread, and the inner wall of the outer casing is provided with an inner thread matching the outer thread, and the delivery pipe and the outer casing are threaded together through the outer thread and the inner thread.

Further, the tubular filter described in the present utility model also includes a multi-functional joint, and the multi-functional joint is provided with a through hole matching the drainage part.

Further, the tubular filter described in the present utility model also includes a filter membrane.

Compared with the prior art, the beneficial effects of the utility model are:

1. The tubular filter described in the utility model is suitable for tubular collectors such as centrifuge tubes, has the advantages of high efficiency and convenient operation, and can be used for aseptic filtration of fluid solutions such as chemicals, medicines, and tissue culture fluids;

2. The tubular filter described in the utility model is further detachably connected by buckling or threaded connection between each component, which is convenient for disassembly and assembly.

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Description of drawings

Fig. 1 is the preferred tubular filter front view of the utility model;

Fig. 2 is the preferred tubular filter structure schematic diagram of the utility model;

Wherein, each reference sign is: 1, upper cup; 11, annular groove; 12, cup cover; 2, filter head; 21, filter part; 211, filter cavity; 2111, annular protrusion; 22, connecting head; 221, outer casing; 222, liquid outlet pipe; 23, air pressure cavity; 24, priming nozzle; 3, feeding pipe; 31, drainage part;

Detailed ways

As shown in Fig. 1 and Fig. 2, the tubular filter described in the utility model includes an upper cup 1 for containing the liquid to be filtered and a filter head 2 installed on the bottom of the upper cup 1 for filtering; the filter head 2 includes a filter part 21 and a connection head 22; the filter part 21 includes a filter chamber 211 containing a filter membrane and a liquid outlet 212 at the bottom of the filter chamber 211, and the filter chamber 211 communicates with the bottom of the upper cup 1; The connection 22 head includes an outer casing 221 extending downward from the periphery of the filter part 21 and a liquid outlet pipe 222 extending downward from the liquid outlet 212. A connection between the outer casing 221 and the liquid outlet 222 is formed between the outer casing 221 and the liquid outlet 222 and the filter. The air pressure chamber 23 that cavity 211 communicates; The side wall of described outer tube 221 is provided with and communicates with air pressure chamber 23 and is used for the priming mouth 24 that is connected with external suction filter device (not shown in the figure); This tubular filter also includes a delivery material Pipe 3, the upper end of the feeding pipe 3 is sleeved in the outer sleeve 221, and the lower end of the feeding pipe 3 is provided with a drainage part 31 communicated with the feeding pipe 3, and the drainage part 31 is connected to the lower pipe by the feeding pipe 3. The diameter gradually decreases, and the bottom of the drainage part 31 is provided with a liquid outlet hole. When the vacuum filter device described in the utility model is in use, the air in the vacuum filter device is sucked away to form a negative pressure after the external connection is connected to the suction filter device, which can effectively improve the filtration efficiency.

In Embodiment 1 of the present utility model, further, the outer circumference of the bottom of the upper cup 1 described in the present utility model is provided with an annular groove 11, and the outer peripheral wall of the filter chamber 211 is provided with an annular groove 11 matching the annular groove 11. The protrusion 2111, the upper cup 1 and the filter head 2 are snapped together through the interference fit between the annular protrusion 2111 and the annular groove 11. The advantage of this feature is that it can facilitate the disassembly and assembly between the upper cup 1 and the filter head 2, and it is convenient to replace the filter membrane and clean the filter head.

The cup opening of the upper cup described in the utility model is provided with a cup cover 12, and the cup cover 12 is fastened with the cup opening of the upper cup. This scheme is applicable to other embodiments except embodiment 1. Further, the cup cover 12 may also be provided with air holes communicating with the outside air.

In Embodiment 2 of the present utility model, the outer wall of the delivery pipe 3 is provided with external threads, and the inner wall of the outer casing 221 is provided with internal threads matching the outer threads. Internal thread fits threaded connection.

On the basis of the above-mentioned embodiment 1 or 2, further, the tubular filter described in the utility model also includes a multi-functional joint 4, and the multi-functional joint 4 is provided with a channel matching the drainage part. hole.

Further, the tubular filter described in the present utility model also includes a filter membrane (not shown in the figure).

The above-mentioned embodiments are only preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. The scope of protection required by the utility model.

Claims (6)

1. a tubular filter, comprises the upper cup for splendid attire liquid to be filtered and the filtering head be installed on for filtering bottom upper cup; It is characterized in that, described filtering head comprises filter house and connector; Institute's filter house comprises the filter chamber holding filter membrane and the liquid outlet be positioned at bottom filter chamber, and described filter chamber is communicated with bottom upper cup; Described connector comprises outer tube from from filter house periphery to downward-extension and from liquid outlet toward the drain pipe of downward-extension, forms the atmospheric pressure cavity communicated with drain pipe and filter chamber between outer tube with drain pipe; Described outer tube sidewall is provided with and is communicated with atmospheric pressure cavity and draws mouth for what be connected with external Suction filtration device; This tubular filter also comprises a conveying pipeline, and the upper end of this conveying pipeline is socketed in outer tube, and the lower end of conveying pipeline is provided with the conduction part communicated with conveying pipeline, described conduction part by conveying pipeline down caliber reduce gradually, the bottom of this conduction part is provided with fluid hole.

2. tubular filter according to claim 1, it is characterized in that, bottom described upper cup, periphery is provided with annular groove, and the periphery wall of described filter chamber is provided with the annular protrusion matched with annular groove, and described upper cup and filtering head are by the mutual snapping of interference fit of annular protrusion and annular groove.

3. tubular filter according to claim 1, is characterized in that, the rim of a cup of described upper cup is provided with bowl cover, this bowl cover and upper cup rim of a cup snapping.

4. tubular filter according to claim 1, is characterized in that, described conveying pipeline outer wall is provided with external screw thread, and outer sleeve inner wall is provided with the internal thread matched with external screw thread, and conveying pipeline is threaded by external screw thread and screw-internal thread fit with outer tube.

5. the tubular filter according to any one of claim 1-4, is characterized in that, this tubular filter also comprises a multifunction conjunction, and described multifunction conjunction is provided with the through hole matched with described conduction part.

6. the tubular filter according to any one of claim 1-4, is characterized in that, this tubular filter also comprises filter membrane.