Bag type filter

Abstract

The utility model discloses a bag type filter which comprises a shell and a filter element arranged in the shell, the shell is provided with a water inlet end, a water taking end and an exhaust port which are communicated with the interior of the shell, the bottom of the shell is provided with a transparent liquid blocking cover, the liquid blocking cover is arranged on the periphery of the water taking end, and the height of the liquid blocking cover is larger than the length of the water taking end. The influence of external pollutants on the water quality can be effectively prevented. The joints of the interior of the shell and all the ports are in arc-shaped contour transition, the dead end filtering volume in a channel is reduced, and the probability of liquid residues and bacterium breeding is reduced. And the exhaust port adopts a cock design, so that the sealing effect and the operation convenience of experimenters are improved. A waste liquid outlet is formed in the bottom of the shell, so that impurity-containing waste liquid can be quickly discharged. And the water inlet end adopts a direct insertion type interface, so that secondary pollution is avoided. The filter is reasonable in structural design and convenient to use, has a remarkable anti-pollution effect, and is suitable for terminal sterilization and filtration of a laboratory water purifier.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a bag filter. Background Art

[0002] Existing bag filters are usually mainly used for terminal disinfection and filtration of laboratory pure water machines, and are widely used in industries such as medicine, chemical industry, and food. Their main function is to efficiently filter liquids, remove impurities and microorganisms, and ensure the purity of the filtered liquids.

[0003] However, during the filtration process of existing bag filters, the liquid outlet end is easily exposed to the air, resulting in the entry of external pollutants such as particulate matter and microorganisms into the filtration system, thereby affecting the purity and quality of the filtered liquid. This kind of pollution not only affects the filtration effect, but also may cause secondary pollution, making the filter need to be replaced and maintained frequently, increasing the use cost.

[0004] Therefore, it is urgent to design a bag filter to solve the problem of liquid splashing. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a bag filter, which has a reasonable structure design, is convenient to use, and can effectively avoid pollution caused by liquid splashing.

[0006] The technical solution adopted by the utility model to solve the above problems is: a bag filter, including a shell and a filter element arranged therein. The shell is provided with a water inlet end, a water intake end and an exhaust port that are communicated with the inside thereof. A liquid retaining cover is arranged at the bottom of the shell, and the liquid retaining cover is arranged on the outer periphery of the water intake end.

[0007] Preferably: The liquid retaining cover includes a gradually changing section above and a vertical section below. The inner diameter of the gradually changing section gradually increases from top to bottom, and there is an arc transition between the gradually changing section and the vertical section.

[0008] Preferably: The liquid retaining cover is connected and adapted with a dust-proof cover, and the vertical section is inserted into the inner peripheral surface of the dust-proof cover and has an interference fit therewith.

[0009] Preferably: The liquid retaining cover is rotatably connected to the root of the water intake end. The water intake end is provided with an annular groove, and the liquid retaining cover is provided with a convex ring adapted to the thickness of the annular groove. The convex ring is snapped into the annular groove, and the liquid retaining cover rotates along the central axis of the annular groove and its convex ring does not come out of the annular groove.

[0010] Preferably: The exhaust port is horizontally arranged on one side of the top of the shell, and it includes an exhaust port end and a plug screwed thereto. The exhaust port end is communicated with the inside of the shell, and an external thread is arranged on its outer peripheral surface. An internal thread adapted to the external thread is arranged on the inner peripheral surface of the plug.

[0011] Preferably, the cock is provided with an isolation sleeve. The outer diameter of the isolation sleeve is smaller than the inner diameter of the exhaust port, the inner diameter of the outer periphery of the cock is larger than the outer diameter of the exhaust port, and the exhaust port is clamped in the cylindrical cavity formed by the outer periphery and the isolation sleeve.

[0012] Preferably, the outer peripheral surface of the cock is provided with strip-shaped anti-slip textures.

[0013] Preferably, an annular expansion cavity is provided at the bottom inside the housing, and the annular expansion cavity is arranged on the outer peripheral side of the filter element.

[0014] Preferably, a waste liquid discharge port is further provided at the bottom of the housing. The waste liquid discharge port is communicated with the annular expansion cavity and is adaptively plugged with a liquid discharge plug.

[0015] Preferably, the water inlet end adopts a direct plug-in interface.

[0016] Compared with the prior art, the present utility model has the following advantages and effects:

[0017] By adding a transparent liquid blocking cover at the water intake end, the present utility model effectively avoids the pollution of the water quality by external particulate matters and microorganisms when the experimental personnel take water samples, ensuring the purity of the filtered liquid. The design of the liquid blocking cover not only protects the water intake end but also extends the service life of the filter element. The connections between the inside of the housing and the water inlet end, the water intake end, and the exhaust port all adopt an arc-shaped contour transition, reducing the volume of dead-end filtration in the channel, reducing the probability of liquid residue and bacteria growth, and improving the filtration effect and liquid purity. The liquid blocking cover is adaptively connected with a dust cover, which is covered when not in use, greatly reducing the pollution of the external environment to the water intake end, and can also be used for temporary collection and storage of liquid, ensuring the purity and safety of the sample. The water inlet end adopts a direct plug-in interface, avoiding the secondary pollution caused by wrapping raw materials with traditional threaded interfaces, simplifying the installation process, and improving the stability and reliability of the system. Description of the Drawings

[0018] Figure 1 is the perspective view of the capsule filter of the embodiment of the present utility model.

[0019] Figure 2 is the exploded view of the structure of the capsule filter of the embodiment of the present utility model.

[0020] Figure 3 is the cross-sectional view of the capsule filter of the embodiment of the present utility model.

[0021] Figure 4 is Figure 2 the partial enlarged view of A in

[0022] Figure 5 is Figure 3 the partial enlarged view of B in

[0023] Figure 6 Yes Figure 3 Partial enlarged view of C in

[0024] Reference numerals in the drawings: housing 1, water inlet end 11, water intake end 12, annular groove 121, exhaust port 13, exhaust port 131, external thread 132, plug 133, internal thread 134, isolation sleeve 135, annular expansion cavity 14, waste liquid discharge port 15, drain plug 16, filter element 2, hollow cavity 21, channel 22, liquid retaining cover 3, tapered section 31, vertical section 32, convex ring 33, dust cover 4. Specific embodiments

[0025] The present utility model will be further described in detail below with reference to the drawings and through embodiments. The following embodiments are explanations of the present utility model and the present utility model is not limited to the following embodiments.

[0026] Embodiment 1:

[0027] See Figure 1 - Figure 6 , in this embodiment, a bag-type filter is involved, which is specifically used for terminal sterilization filtration of a laboratory pure water machine, and specifically includes: a housing 1 and a filter element 2 disposed therein. The housing 1 is provided with a water inlet end 11, a water intake end 12 and an exhaust port 13 that are in communication with the inside thereof. A liquid retaining cover 3 is provided at the bottom of the housing 1. The liquid retaining cover 3 is disposed on the outer periphery of the water intake end 12, and the height of the liquid retaining cover 3 is greater than the length of the water intake end 12.

[0028] Specifically, in this embodiment, the water inlet end 11 is disposed at the top of the housing 1, and the water intake end 12 is disposed at the bottom of the housing 1. The liquid to be filtered flows into the housing 1 from the water inlet end 11, and flows out from the water intake end 12 after being filtered by the filter element 2. In this embodiment, the filter element 2 is cylindrical and has a hollow cavity 21, and the hollow cavity 21 is in communication with the water intake end 12. There is a channel 22 between the filter element 2 and the housing 1, and the channel 22 is in communication with the water inlet end 11. The liquid to be filtered flows into the channel 22 of the housing 1 from the water inlet end 11, passes through the outer side of the filter element 2 and enters the hollow cavity 21, and this process also filters the liquid to be filtered. The filtered liquid flows out through the water intake end 12. The exhaust port 13 in this embodiment can be used for both exhaust and waste liquid discharge, so that impurities in the liquid to be filtered that cannot be filtered by the filter element 2 are discharged through the exhaust port 13. In addition, the water inlet end 11 in this embodiment adopts a direct plug-in interface, avoiding secondary pollution caused by the need to wrap raw tape for traditional threaded interfaces.

[0029] In this utility model, a liquid baffle 3 is added to the water intake end 12 of the capsule filter. After the filtered liquid flows out through the water intake end 12, it is inside the liquid baffle 3. This not only enables the experimenter to avoid the influence of pollutants such as particulate matter and microorganisms outside the liquid baffle 3 on the water quality when taking water samples (especially when the liquid spurts out from the water intake end 12 and splashes with a large water flow), but also effectively prevents these pollutants from contaminating the water intake end 12, and even invading the housing 1 from the water intake end 12 to contaminate the filter element 2, causing the filter element 2 to fail. The design of the liquid baffle 3 ensures the purity of the filtered liquid while increasing the service life of the filter element 2 and even the entire capsule filter. In this embodiment, the liquid baffle 3 is made of a transparent material, which is convenient for the experimenter to observe the state of the liquid flowing out.

[0030] In this embodiment, the connections between the interior of the housing 1 and the water inlet end 11, the water intake end 12, and the exhaust port 13 all adopt an arc-shaped contour transition. Through the optimization of the internal structure, the volume of dead-end filtration in the channel 22 is reduced, the liquid residue is reduced, and the probability of bacteria breeding is greatly reduced. This arc-shaped transition design not only makes the liquid flow more smoothly, reduces the residence time of the liquid at the transition, but also effectively prevents the accumulation of impurities at the dead ends, thereby further improving the filtration effect and the purity of the liquid.

[0031] See Figure 3 , the liquid baffle 3 includes a tapered section 31 above and a vertical section 32 below. The inner diameter of the tapered section 31 gradually increases from top to bottom. There is an arc transition between the tapered section 31 and the vertical section 32, so that the filtered liquid splashes after flowing out from the water intake end 12 and is blocked by the inner wall of the liquid baffle 3. These blocked liquids finally flow down along the inner wall of the liquid baffle 3. The arc transition design reduces the residue of the liquid on the inner wall of the liquid baffle 3. The liquid baffle 3 is connected and adapted with a dust-proof cover 4. The vertical section 32 is inserted into the inner peripheral surface of the dust-proof cover 4 and has an interference fit with it. When not in use, the dust-proof cover 4 is covered, isolating the water intake end 12 from the external environment, greatly reducing the pollution of the external environment to the water intake end 12. In addition, the dust-proof cover 4 can also be used for temporary collection and storage of the liquid, ensuring the purity and safety of the water sample during the collection and storage processes.

[0032] See Figure 4 and Figure 5, the liquid baffle 3 is rotatably connected to the root of the water intake end 12. The water intake end 12 is provided with an annular groove 121, and the liquid baffle 3 is provided with a convex ring 33 adapted to the thickness of the annular groove 121. The convex ring 33 is snapped into the annular groove 121, and the liquid baffle 3 rotates along the central axis of the annular groove 121 and its convex ring 33 does not come out of the annular groove 121. The liquid baffle 3 is the main body for preventing pollution, and its surface needs to be disinfected and sterilized. The liquid baffle 3 in this embodiment can rotate, and cleaning is carried out while the liquid baffle 3 rotates, which helps to comprehensively disinfect and sterilize. The rotation function enables the cleaning agent or disinfectant to evenly cover the entire surface of the liquid baffle 3, thereby improving the disinfection and sterilization effect and ensuring the hygiene of the filter.

[0033] In this embodiment, the exhaust port 13 is horizontally arranged on one side of the top of the housing 1, which can effectively discharge the air inside the housing 1, prevent the generation of bubbles, ensure the continuous and stable filtration process, and the horizontal arrangement can also reduce the attachment of pollutants in the external environment to a certain extent. The exhaust port 13 includes an exhaust port 131 and a plug 133 threadedly connected thereto. The exhaust port 131 is communicated with the inside of the housing 1. The outer peripheral surface of the exhaust port 131 is provided with an external thread 132, and the inner peripheral surface of the plug 133 is provided with an internal thread 134 adapted to the external thread 132. The plug 133 is provided with an isolation sleeve 135. The outer diameter of the isolation sleeve 135 is smaller than the inner diameter of the exhaust port 131, and the inner diameter of the outer peripheral edge of the plug 133 is larger than the outer diameter of the exhaust port 131. The exhaust port 131 is clamped in the cylindrical cavity formed by the outer peripheral edge and the isolation sleeve 135, and a barrier is formed between the gas inside and outside the housing 1 through the side wall of the exhaust port 131, enhancing the sealing effect and reducing the possibility of pollutants entering from the exhaust port 131. At the same time, it can also prevent the liquid from leaking out through the exhaust port 131. In addition, the outer peripheral surface of the plug 133 is provided with strip-shaped anti-slip textures, which increases the holding force of the plug 133 and is convenient for the experimenter to exhaust.

[0034] An annular expansion cavity 14 is provided at the inner bottom of the housing 1, and the annular expansion cavity 14 is arranged on the outer peripheral side of the filter element 2. A waste liquid discharge port 15 is further provided at the bottom of the housing 1. The waste liquid discharge port 15 is communicated with the annular expansion cavity 14 and is plugged and adapted with a drain plug 16. The impurities that are not filtered by the filter element 2 accumulate in the annular expansion cavity 14, increasing the impurity accommodation space of the housing 1 and reducing the probability of the filter element 2 being blocked. In addition, the waste liquid discharge port 15 provided at the bottom of the housing 1 is communicated with the annular expansion cavity 14. In this embodiment, the waste liquid discharge port 15 is arranged obliquely downward and is used in cooperation with the drain plug 16, so that the waste liquid containing impurities can be quickly discharged through the waste liquid discharge port 15.

[0035] The above content described in this specification is only an illustrative example of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the specific embodiments described, or use similar ways to replace them, as long as they do not deviate from the content of this specification of the present utility model or exceed the scope defined by this claim book, they shall fall within the protection scope of the present utility model.

Claims

1. A capsule filter, comprising a housing and a filter element disposed therein, wherein the housing is provided with a water inlet end, a water intake end and an exhaust port which are in communication with the interior of the housing, and characterized in that: The bottom of the shell is provided with a liquid blocking cover, and the liquid blocking cover is arranged on the outer periphery of the water intake end.

2. A capsule filter according to claim 1, characterized in that: The liquid-blocking cover comprises an upper gradient section and a lower vertical section. The inner diameter of the gradient section increases gradually from top to bottom, and there is an arc transition between the gradient section and the vertical section.

3. A capsule filter according to claim 2, characterized in that: The liquid-blocking cover is connected and adapted to be equipped with a dust cover, and the vertical section is plugged into the inner peripheral surface of the dust cover and has an interference fit therewith.

4. A capsule filter according to claim 1, characterized in that: The liquid retaining cover is rotatably connected to the root of the water intake end, the water intake end is provided with an annular groove, the liquid retaining cover is provided with a convex ring adapted to the thickness of the annular groove, the convex ring is stuck in the annular groove, the liquid retaining cover rotates along the central axis of the annular groove and its convex ring does not fall out of the annular groove.

5. The capsule filter according to claim 1, characterized in that: The exhaust port is laterally arranged on one side of the top of the shell, and includes an exhaust port and a plug threadedly connected thereto. The exhaust port is communicated with the inside of the shell, and its outer peripheral surface is provided with an external thread, and the inner peripheral surface of the plug is provided with an internal thread matched with the external thread.

6. A capsule filter according to claim 5, characterized in that: The plug is provided with an isolation sleeve, the outer diameter of the isolation sleeve is smaller than the inner diameter of the exhaust port, the inner diameter of the outer circumference of the plug is larger than the outer diameter of the exhaust port, and the exhaust port is clamped in a cylindrical cavity formed by the outer circumference and the isolation sleeve.

7. A capsule filter according to claim 6, characterized in that: The outer peripheral surface of the cock is provided with a strip-shaped anti-skid texture.

8. The capsule filter according to claim 1, characterized in that: The inner bottom of the shell is provided with an annular expansion cavity, and the annular expansion cavity is arranged on the outer peripheral side of the filter element.

9. A capsule filter according to claim 8, characterized in that: The bottom of the shell is also provided with a waste liquid discharge port, which is communicated with the annular expansion cavity and is plugged and adapted with a liquid discharge plug.

10. The capsule filter according to claim 1, characterized in that: The water inlet end adopts a direct plug-in interface.

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