Suction filter

Abstract

The utility model discloses a suction filter. The suction filter comprises a shell, a filter bag and a filter mesh bag, the housing has a filter chamber. The upper and lower ends of the filter cavity are provided with a suction channel and a negative pressure channel. And a plurality of filtering holes are uniformly distributed in the filtering bag. And the filter bag is arranged in the filter cavity and is connected with the shell. Openings are formed in the upper ends of the filter bags. And the filter mesh bag is arranged on the inner side of the filter bag. The filter mesh bag is provided with a bag opening sleeved on the opening. According to the suction filter disclosed by the utility model, sucked materials are filtered through the filter screen bag, so that solid-liquid separation is realized. The filter bag is provided with the filter holes, so that the suction is not hindered, the filter mesh bag can be supported, the effective filter area of the filter mesh bag is greatly increased, and the frequency of cleaning, maintaining or replacing the filter mesh bag is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device supplies, and particularly relates to an aspiration filter. Background Art

[0002] A negative pressure aspirator is a tool that creates a negative pressure state at its suction head through a certain method, causing the substances outside the suction head to be squeezed towards the suction head, thereby achieving the "aspiration" effect.

[0003] Currently, most of the aspirators used in hospital surgeries, in orthopedic, neurosurgical, and surgical debridement surgeries, are very likely to be blocked due to bone chips, bone spurs, bone tumor tissues, blood clots, and fragmented human tissues that are shed or excised and are not easily clamped during the surgery, hindering the normal operation of the aspirator head and the normal progress of the surgery. In the prior art, the aspirator is filtered by adding a filter screen. However, after the filter screen intercepts solid fragments, the mixture of blood and intercepted tissues will accelerate the formation of blood clots, and it is also very easy to cause accumulation and blockage, and it is relatively difficult to clean. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an aspiration filter to solve one or more technical problems in the prior art, and at least provide a beneficial choice or creation condition.

[0005] The technical solution adopted to solve the above technical problems:

[0006] An aspiration filter, comprising: a housing, a filter pocket, and a filter mesh bag; the housing has a filtering cavity, and the upper and lower ends of the filtering cavity have an aspiration channel and a negative pressure channel respectively. The filter pocket is in the shape of a cylindrical tube and is evenly distributed with a plurality of filter holes. The filter pocket is arranged in the filtering cavity and is connected to the housing. The upper end of the filter pocket has an opening, and the filter mesh bag is arranged inside the filter pocket, and the filter mesh bag has a bag mouth sleeved on the opening.

[0007] The aspiration filter provided by the utility model has at least the following beneficial effects: The aspiration channel and the negative pressure channel are respectively communicated with an aspiration tube and a negative pressure generating element, so that a pressure difference is formed at the upper and lower ends of the filtering cavity. The aspirated matter enters the filtering cavity from the aspiration channel and is filtered by the filter mesh bag to intercept the solid aspirated matter, realizing solid-liquid separation. The filter pocket has filter holes, which will not hinder the aspiration and can also support the filter mesh bag, greatly increasing the effective filtering area of the filter mesh bag and reducing the frequency of cleaning and maintenance or replacing the filter mesh bag.

[0008] As a further improvement of the above technical solution, the housing is in the shape of a variable-diameter cylindrical tube that is thick in the middle and thin at the upper and lower ends.

[0009] As a further improvement of the above technical solution, the outer shell includes a cup cover and a cup body arranged up and down. The cup cover and the cup body are detachably connected to each other to form the filtering cavity.

[0010] As a further improvement of the above technical solution, the suction channel is arranged at the upper end of the cup cover, and the negative pressure channel is arranged at the lower end of the cup body.

[0011] As a further improvement of the above technical solution, a reflux prevention plug is arranged at the lower end of the suction channel. The reflux prevention plug is made of a soft material, and the lower end of the reflux prevention plug has reflux prevention valves that are inclined towards each other and tightly abut against each other.

[0012] As a further improvement of the above technical solution, the inner side of the cup cover has a connection end extending along the suction channel, and the upper end of the reflux prevention plug is press-fitted outside the connection end.

[0013] As a further improvement of the above technical solution, the lower end of the cup cover is threadedly sleeved with the upper end of the cup body.

[0014] As a further improvement of the above technical solution, an upper limit portion is arranged on the inner side of the lower end of the cup cover, a lower limit portion is arranged on the inner side of the upper end of the cup body, and the upper end of the filter pocket has a snap ring clamped between the upper limit portion and the lower limit portion.

[0015] As a further improvement of the above technical solution, the upper end of the filter mesh bag wraps the upper end of the filter pocket and is pressed between the snap ring and the lower limit portion.

[0016] As a further improvement of the above technical solution, the outer shell or the cup body and the filter pocket are made of a transparent material. Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0018] Figure 1 is a schematic cross-sectional view of one embodiment of the suction filter provided by the present utility model;

[0019] Figure 2 is an exploded cross-sectional view of one embodiment of the suction filter provided by the present utility model.

[0020] In the figure: 100, outer shell; 110, cup cover; 111, suction channel; 112, upper limit portion; 113, connection end; 120, cup body; 121, negative pressure channel; 122, lower limit portion; 130, reflux prevention plug; 131, reflux prevention valve; 200, filter pocket; 210, opening; 220, filter hole; 230, snap ring; 300, filter mesh bag; 310, bag mouth. Detailed Description of the Embodiments

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0023] In the description of the present invention, if there are words such as "several" for description, its meaning is one or more, and the meaning of multiple is more than two. Understanding greater than, less than, exceeding, etc. does not include the present number, and understanding above, below, within, etc. includes the present number.

[0024] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0025] Refer to Figures 1 to 2 , the following embodiments are made for the suction filter of the present invention:

[0026] A suction filter, comprising: a housing 100, a filter pocket 200, and a filter mesh bag 300.

[0027] The housing 100 has a hollow inner cavity. Taking the inner cavity as a filter chamber. The upper and lower ends of the filter chamber have a suction channel 111 and a negative pressure channel 121. Both the suction channel 111 and the negative pressure channel 121 communicate with the filter chamber and the outside.

[0028] The filter pocket 200 is in a cylindrical shape. The filter pocket 200 is arranged in the filter chamber. One end of the filter pocket 200 facing the suction channel 111 has an open opening 210. The filter pocket 200 is evenly distributed with a plurality of filter holes 220. The filter pocket 200 is connected to the inner wall of the housing 100.

[0029] The filter mesh bag 300 is arranged inside the filter pocket 200. The upper end of the filter mesh bag 300 has a bag mouth 310, and the bag mouth 310 is sleeved on the opening 210 at the upper end of the filter pocket 200.

[0030] In actual use, the suction channel 111 and the negative pressure channel 121 are respectively connected to the suction tube and the negative pressure generating element, so that a pressure difference is formed between the upper and lower ends of the filtering cavity. The attractant enters the filtering cavity from the suction channel 111 and is filtered through the filter mesh bag 300 to intercept the solid attractant, realizing solid-liquid separation. The filter pocket 200 has filter holes 220, which will not hinder the suction and can also support the filter mesh bag 300, greatly increasing the effective filtering area of the filter mesh bag 300 and reducing the frequency of cleaning and maintenance or replacement of the filter mesh bag 300.

[0031] In this embodiment, the housing 100 has a variable-diameter cylindrical shape that is thick in the middle and thin at both the upper and lower ends. Both the upper and lower ends of the housing 100 are in the shape of a circular tube. The suction tube and the negative pressure tube are connected to the suction channel 111 and the negative pressure channel 121 respectively by sleeving the upper and lower ends of the housing 100.

[0032] The housing 100 has a central axis extending vertically. Both the suction channel 111 and the negative pressure channel 121 are coaxially arranged with the central axis.

[0033] To facilitate the replacement of the filter mesh bag 300, in this embodiment, the housing 100 includes: a cup cover 110 and a cup body 120. The cup cover 110 and the cup body 120 are arranged up and down to form the filtering cavity. The cup cover 110 and the cup body 120 are detachably connected to each other. The suction channel 111 and the negative pressure channel 121 are respectively arranged on the cup cover 110 and the cup body 120. Specifically, the suction channel 111 is arranged at the upper end of the cup cover 110, and the negative pressure channel 121 is arranged at the lower end of the cup body 120.

[0034] In this embodiment, both the cup cover 110 and the cup body 120 are in the shape of a solid of revolution, or a surface of revolution. The axis of revolution of the cup cover 110 and the cup body 120 coincides with the central axis. It should be noted that: the above central axis and axis of revolution are virtual features, which are set to facilitate the accurate description of the shapes and positional relationships of the cup cover 110 and the cup body 120.

[0035] In this embodiment, both the lower end of the cup cover 110 and the upper end of the cup body 120 are in the shape of a cylindrical tube. The cup cover 110 and the cup body 120 are threadedly sleeved with each other. Specifically, the lower end of the cup cover 110 has internal threads, and the upper end of the cup body 120 has corresponding external threads. The lower end of the cup cover 110 is threadedly sleeved on the upper end of the cup body 120. By rotating the cup cover 110 and the cup body 120 relative to each other, the detachable connection between the two can be realized.

[0036] The outer side of the upper end of the filter bag 200 has a ring-shaped snap ring 230 that protrudes radially outward. The inner side of the lower end of the cup lid 110 is provided with an upper limit portion 112 that protrudes radially inward, and the inner side of the upper end of the cup body 120 is provided with a lower limit portion 122 that protrudes radially inward. When the cup lid 110 and the cup body 120 are screwed together, the upper limit portion 112 and the lower limit portion 122 are vertically aligned, and a limit gap is left between the upper limit portion 112 and the lower limit portion 122. The snap ring 230 of the filter bag 200 is embedded in the limit gap, so that the filter bag 200 is coaxially and fixedly arranged in the filtering cavity.

[0037] The upper end of the filter mesh bag 300 wraps the upper end of the filter bag 200. Referring to the attached drawings, the bag body of the filter mesh bag 300 is arranged inside the filter bag 200, and the upper end of the filter mesh bag 300 extends from the inside and wraps to the lower side of the snap ring 230 of the filter bag 200. The bag mouth 310 of the filter mesh bag 300 is arranged on the lower side of the snap ring 230 and the lower limit portion 122, and the upper end of the filter mesh bag 300 is pressed between the snap ring 230 and the lower limit portion 122.

[0038] To avoid backflow when replacing the drainage bottle or in case of negative pressure failure, in this embodiment, the lower end of the suction channel 111 is provided with an anti-backflow plug 130. The anti-backflow plug 130 is made of a soft material, and the lower end of the anti-backflow plug 130 has anti-backflow valves 131 that are inclined towards each other and tightly abutted against each other.

[0039] The anti-backflow plug 130 is made of rubber. When the suction fluid flows forward, the resistance of the anti-backflow valves 131 is small and they can be pushed open and deformed. When the fluid attempts to flow backward, the anti-backflow valves 131 return to their original state and are more tightly abutted against each other under the action of the fluid, thereby blocking the backflow of the fluid.

[0040] In this embodiment, the inner side of the cup lid 110 has a connection end 113 that extends along the suction channel 111, and the upper end of the anti-backflow plug 130 is press-fitted outside the connection end 113. The connection end 113 has a plurality of anti-slip lines that are arranged in the vertical direction and protrude radially.

[0041] To facilitate observing the filtering situation, it is preferably that the cup body 120, the cup lid 110, and the filter bag 200 are all made of a transparent material. In this embodiment, the materials of the cup body 120, the cup lid 110, and the filter bag 200 are transparent grades of polyether ether ketone (PEEK). Polyether ether ketone is a functional polymer material, which can be blow-molded into transparent pipes, or calendered into plates of different thicknesses, and can also be used to produce different-shaped high-strength transparent plastic parts by injection molding using an injection molding machine with a high screw diameter ratio.

[0042] In some other embodiments, for cost control considerations, the materials of the cup body 120, the cup lid 110, and the filter pocket 200 may be transparent acrylic. In some other embodiments, the materials of the cup body 120, the cup lid 110, and the filter pocket 200 may also be: transparent polyphenylene (PHB), polystyrene (commonly known as "transparent benzene"), high-strength organic glass (polymethyl acrylate), poly(p-phenyleneterephthalamide) (polyarylate), etc.

[0043] Referring to Figures 1 to 2 , when assembling the suction filter of the present utility model: First, the bag mouth 310 of the filter mesh bag 300 is sleeved on the upper end of the filter pocket 200, and the bag mouth 310 is clamped under the clamping ring 230. Then, the lower part of the filter pocket 200 is inserted into the cup body 120, and during the insertion process, the bag mouth 310 of the filter mesh bag 300 is clamped under the lower limit portion 122. Finally, after the anti-reflux plug 130 is press-fitted and sleeved on the connection end 113 of the cup lid 110, the cup lid 110 and the cup body 120 are threadedly sleeved with each other, so that the upper limit portion 112 presses tightly on the upper side of the clamping ring 230.

[0044] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can still make various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and purposes of the present utility model. These changes, modifications, equivalent variations, or substitutions are all included within the scope defined by the claims of this application, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An attracting filter, characterized in that: Comprising: A housing, a filter pocket and a filter mesh bag; The housing has a filtering chamber, with a suction channel and a negative pressure channel at the upper and lower ends of the filtering chamber respectively. The filter pocket is in the shape of a cylindrical tube and is evenly distributed with a plurality of filter holes. The filter pocket is arranged in the filtering chamber and connected to the housing. The upper end of the filter pocket has an opening, and the filter mesh bag is arranged inside the filter pocket, and the filter mesh bag has a bag mouth sleeved on the opening.

2. The suction filter according to claim 1, characterized in that: The housing is in the shape of a variable-diameter cylindrical tube that is thick in the middle and thin at the upper and lower ends.

3. The suction filter according to claim 2, wherein: The housing includes a cup lid and a cup body arranged up and down. The cup lid and the cup body are detachably connected to each other to form the filtering chamber.

4. The suction filter according to claim 3, characterized in that: The suction channel is arranged at the upper end of the cup lid, and the negative pressure channel is arranged at the lower end of the cup body.

5. The suction filter according to claim 4, characterized in that: A reflux prevention plug is arranged at the lower end of the suction channel. The reflux prevention plug is made of a soft material, and the lower end of the reflux prevention plug has reflux prevention valves that are inclined towards each other and tightly abutted against each other.

6. The suction filter according to claim 5, characterized in that: The inner side of the cup lid has a connection end extending along the suction channel, and the upper end of the reflux prevention plug is interference-fitted on the outside of the connection end.

7. The suction filter according to claim 3, characterized in that: The lower end of the cup lid is threadedly sleeved with the upper end of the cup body.

8. The suction filter according to claim 7, characterized in that: An upper limit portion is arranged on the inner side of the lower end of the cup lid, and a lower limit portion is arranged on the inner side of the upper end of the cup body. The upper end of the filter pocket has a snap ring clamped between the upper limit portion and the lower limit portion.

9. The suction filter according to claim 8, characterized in that: The upper end of the filter mesh bag wraps the upper end of the filter pocket and is pressed between the snap ring and the lower limit portion.

10. The suction filter according to claim 3, characterized in that: The housing or the cup body and the filter pocket are made of a transparent material.

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