Backflow-preventing environment-friendly filter bag

Abstract

The utility model relates to an anti-backflow environment-friendly filter bag, which belongs to the field of filter bags and comprises a filter pipe body, anti-backflow mechanisms for preventing liquid from flowing back are arranged on the inner walls of the left side and the right side of the filter pipe body, and a plurality of layers of filter mechanisms for filtering are arranged on the inner wall of the filter pipe body. According to the anti-backflow environment-friendly filter bag, the anti-backflow mechanism and the arc-shaped hinged frame are arranged to serve as a supporting structure of the whole anti-backflow mechanism, the baffle is connected with the arc-shaped hinged frame in a hinged mode and can move up and down around the hinged point to form a barrier for liquid flowing, and the supporting spring provides elastic force to enable the baffle to be kept at a certain position; when the pressure is large, the liquid passes through the baffle through compression, and when the pressing pressure is small, the baffle rebounds to prevent the liquid from flowing back, the limiting piece is used for limiting the upturning distance of the baffle to ensure that the baffle moves within a certain range, and when the fluid passes through the filter bag, the anti-backflow mechanism controls the flow direction of the fluid through the position change of the baffle; and the filtered fluid is prevented from flowing back to the area before filtration due to pressure change.

Description

Technical Field

[0001] The utility model relates to the technical field of filter bags, in particular to an anti-backflow environmentally friendly filter bag. Background Art

[0002] As a filter element, the filter bag is a key link in the filtration process. The quality of the filter bag determines the filtration effect of the user to a large extent. The filter bag uses filter cloth produced by world-renowned companies, equipped with patented structure ring mouth, and manufactured with professional production equipment. The filter bag has a variety of materials and complete specifications, which can meet the application of various fields in a targeted manner. The liquid filter bag is suitable for filtering general industrial liquids such as electroplating E, D paint, ink, coating, food, chemical, grain and oil and other chemical liquids; acid and alkali resistant fibers have high mechanical strength and can be used repeatedly.

[0003] As disclosed in Chinese Patent Publication No. (CN212818668U), an anti-backflow environmentally friendly filter bag comprises a fixing ring and a filter bag, wherein the bottom surface of the fixing ring is provided with a filter bag, and both sides of the inner wall of the filter bag are provided with fixing columns, one side surface of the two fixing columns is provided with a card slot one, and a card slot two is provided below the card slot one, with beneficial effects: the utility model can effectively filter out larger impurities by filtering through the first filter net between the fixing columns, and it is convenient to filter out smaller impurities by filtering through the second filter net below the first filter net, thereby avoiding the problem of blockage caused by poor filtering effect, and can effectively adsorb harmful impurities in the liquid by adsorption through the activated carbon adsorption layer at the bottom of the reinforcement net, wherein the double filtration of the first filter net and the second filter net can effectively filter out impurities in the liquid, and the adsorption through the activated carbon adsorption layer is convenient to adsorb harmful impurities in the liquid, which is beneficial to improving the filtering effect.

[0004] However, the above patent still has the problem of poor anti-backflow blocking effect on the filter bag. For example, in the above patent, a baffle is connected to the bottom of the spring so that the baffle is pulled back by elastic force after the pressure is reduced to prevent backflow. However, the spring in this method still has a certain inward compression space, and there is no limiting structure above the baffle. When the reflux pressure is greater than the spring force, the baffle will be pushed outward to compress the spring to produce a blocking gap, thereby causing liquid reflux. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an anti-backflow environmentally friendly filter bag, which has the advantages of good anti-backflow effect, etc., and solves the problem of poor anti-backflow blocking effect on the filter bag in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-backflow environmentally friendly filter bag, comprising a filter tube body, the inner walls on the left and right sides of the filter tube body are provided with an anti-backflow mechanism to prevent liquid backflow, and the inner wall of the filter tube body is provided with a multi-layer filtering mechanism;

[0007] The backflow prevention mechanism includes two arc-shaped hinged frames, two baffles, two brackets, two supporting springs, two push blocks and a limiter. The two arc-shaped hinged frames are respectively fixed to the left and right inner walls of the filter tube body, the two baffles are respectively hinged to the two arc-shaped hinged frames, the two brackets are respectively fixed to the left and right inner walls of the filter tube body and are located below the baffles, the bottom ends of the two supporting springs are respectively fixed to the upper surfaces of the two brackets at an angle, the two push blocks are respectively fixed to the lower surfaces of the two baffles, the top ends of the two supporting springs are respectively fixed to the lower surfaces of the two push blocks, and the limiters are arranged on the left and right inner walls of the filter tube body to limit the upward flipping spacing of the two baffles.

[0008] Furthermore, the limiting member includes two slide rails, a limiting ring and two fixing frames, the two slide rails are respectively fixed to the left and right inner walls of the filter tube body, the limiting ring is slidably connected to the outer sides of the two slide rails, and the two fixing frames are respectively fixed to the left and right sides of the upper surface of the limiting ring.

[0009] Furthermore, the two fixing frames are respectively slidably connected to the outer sides of the two slide rails, fixing screw holes are provided on the outer sides of the fixing frames, and locking bolts are threadedly connected to the inner walls of the fixing screw holes.

[0010] Furthermore, the two baffles are both semicircular in shape, and sealing gaskets are fixed on opposite sides of the two baffles.

[0011] Furthermore, the fixing frame is in a U-shape, and the distance between the inner walls at the front and rear sides of the fixing frame is equal to the width of the slide rail.

[0012] Furthermore, the filtering mechanism includes a threaded ring, a connecting sleeve, a supporting keel, a filter screen, a primary filter layer and a high-efficiency filter layer. The threaded ring is threadedly connected to the inner wall of the filter tube body, the connecting sleeve is fixed to the bottom end of the threaded ring, the supporting keel is fixed to the lower surface of the connecting sleeve, the filter screen is fixed to the outer side of the supporting keel, the primary filter layer is mounted on the outer side of the filter screen, and the high-efficiency filter layer is mounted on the outer side of the primary filter layer.

[0013] Furthermore, the primary filter layer is a synthetic fiber cloth layer, and the high-efficiency filter layer is a microporous filter membrane layer.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The anti-backflow environmentally friendly filter bag is provided with an anti-backflow mechanism. The arc-shaped hinged frame serves as the supporting structure of the entire anti-backflow mechanism. The baffle is connected to the arc-shaped hinged frame by hinges and can move up and down around the hinge point to form an obstacle to the flow of liquid. The support spring provides elastic force to keep the baffle in a certain position. When the pressure is high, it is compressed to allow the liquid to pass through, and when the downward pressure is low, it rebounds to prevent the liquid from flowing back. The limiter is used to limit the spacing of the baffle turning up to ensure that the baffle moves within a certain range. When the fluid passes through the filter bag, the anti-backflow mechanism controls the flow direction of the fluid by changing the position of the baffle to prevent the filtered fluid from flowing back to the area before filtration due to pressure changes.

[0016] 2. The anti-backflow environmentally friendly filter bag is equipped with a filtering mechanism. The threaded ring is used as the fixing point of the filtering mechanism. The connecting sleeve supports the entire filtering mechanism. The supporting keel is fixed to the lower surface of the connecting sleeve to provide structural support. The filter screen is used to initially intercept larger particles. The primary filter layer is composed of a synthetic fiber cloth layer to capture medium-sized particles. The high-efficiency filter layer is composed of a microporous filter membrane layer to capture smaller particles or microorganisms. The filtering efficiency is gradually improved through multiple layers of filtering materials. The primary filter layer intercepts larger particles, while the high-efficiency filter layer is responsible for filtering smaller pollutants, which can extend the service life of the filter bag because larger particles will not directly impact the high-efficiency filter layer, thereby reducing the wear of the high-efficiency filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the backflow prevention mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the filtering mechanism of the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of the filtering mechanism of the utility model.

[0021] In the figure: 1 filter tube body, 2 anti-backflow mechanism, 21 arc-shaped hinge frame, 22 baffle, 23 bracket, 24 support spring, 25 push block, 26 limiter, 261 slide rail, 262 limit ring, 263 fixing frame, 264 locking bolt, 3 filter mechanism, 31 threaded ring, 32 connecting sleeve, 33 support keel, 34 filter screen, 35 primary filter layer, 36 high efficiency filter layer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 In this embodiment, an anti-backflow environmentally friendly filter bag includes a filter tube body 1, and the inner walls on the left and right sides of the filter tube body 1 are provided with an anti-backflow mechanism 2 for preventing liquid backflow, and the inner wall of the filter tube body 1 is provided with a filter mechanism 3 for multi-layer filtering.

[0024] See also Figure 2 In order to limit the filter bag to prevent backflow, the backflow prevention mechanism 2 in this embodiment includes two arc-shaped hinged frames 21, two baffles 22, two brackets 23, two supporting springs 24, two push blocks 25 and a limiter 26. The two arc-shaped hinged frames 21 are respectively fixed to the left and right inner walls of the filter tube body 1, and the two baffles 22 are respectively hinged to the two arc-shaped hinged frames 21. The arc-shaped hinged frames 21 serve as the supporting structure of the entire backflow prevention mechanism 2. The baffles 22 are connected to the arc-shaped hinged frames 21 by hinges and can move up and down around the hinge point to form an obstacle to the flow of liquid. The two brackets 23 are respectively fixed to the left and right inner walls of the filter tube body 1 and are located below the baffles 22. The bracket 23 is located below the baffle 22 and is fixed to the inner wall of the filter tube body 1 to support the entire mechanism. The bottom ends of the two support springs 24 are respectively fixed to the upper surfaces of the two brackets 23 at an angle. The two push blocks 25 are respectively fixed to the lower surfaces of the two baffles 22. The top ends of the two support springs 24 are respectively fixed to the lower surfaces of the two push blocks 25. The bottom ends of the support springs 24 are fixed to the bracket 23, and the top ends are fixed to the push blocks 25 to provide elastic force to keep the baffle 22 in a certain position. When the pressure is high, it is compressed to allow the liquid to pass through, and when the downward pressure is small, it rebounds to prevent the liquid from flowing back. The limiter 26 is arranged on the inner walls of the left and right sides of the filter tube body 1 to limit the upward flipping spacing of the two baffles 22.

[0025] The limiting member 26 includes two slide rails 261, a limiting ring 262 and two fixing frames 263. The two slide rails 261 are respectively fixed to the left and right inner walls of the filter tube body 1, the limiting ring 262 is slidably connected to the outer sides of the two slide rails 261, and the two fixing frames 263 are respectively fixed to the left and right sides of the upper surface of the limiting ring 262. The limiting member 26 is used to limit the upward turning spacing of the baffle 22 to ensure that the baffle 22 moves within a certain range. When the fluid passes through the filter bag, the anti-backflow mechanism 2 controls the flow direction of the fluid by changing the position of the baffle 22 to prevent the filtered fluid from flowing back to the area before filtration due to pressure changes.

[0026] In this embodiment, the two fixing frames 263 are respectively slidably connected to the outer sides of the two slide rails 261, a fixing screw hole is opened on the outer side of the fixing frame 263, and the inner wall of the fixing screw hole is threadedly connected with a locking bolt 264, the two baffles 22 are both semicircular in shape, the push block 25 controls the position of the baffle 22 by the elastic force of the supporting spring 24, and sealing gaskets are fixed on the opposite sides of the two baffles 22, the fixing frame 263 is U-shaped, and the distance between the inner walls on the front and rear sides of the fixing frame 263 is equal to the width of the slide rail 261.

[0027] See also Figure 3-4 In order to use the filter bag for environmentally friendly filtering, the filter mechanism 3 in this embodiment includes a threaded ring 31, a connecting sleeve 32, a supporting keel 33, a filter screen 34, a primary filter layer 35 and a high-efficiency filter layer 36. The threaded ring 31 is threadedly connected to the inner wall of the filter tube body 1, the connecting sleeve 32 is fixed to the bottom end of the threaded ring 31, and the supporting keel 33 is fixed to the lower surface of the connecting sleeve 32. The threaded ring 31 serves as a fixing point for the filter mechanism 3. The connecting sleeve 32 supports the entire filter mechanism 3. The supporting keel 33 is fixed to the lower surface of the connecting sleeve 32 to provide structural support. The filter screen 34 is fixed to the outer side of the supporting keel 33. The filter screen 34 is used to preliminarily intercept larger particles. The primary filter layer 35 is sleeved on the outer side of the filter screen 34, and the high-efficiency filter layer 36 is sleeved on the outer side of the primary filter layer 35.

[0028] In this embodiment, the primary filter layer 35 is a synthetic fiber cloth layer, and the high-efficiency filter layer 36 is a microporous filter membrane layer. The primary filter layer 35 is composed of a synthetic fiber cloth layer for capturing medium-sized particles, and the high-efficiency filter layer 36 is composed of a microporous filter membrane layer for capturing smaller particles or microorganisms. The filtration efficiency is gradually improved by using multiple layers of filter materials.

[0029] The working principle of the above embodiment is:

[0030] (1) When the filter bag is used for limiting backflow prevention, the arc-shaped hinge frame 21 serves as the supporting structure of the entire backflow prevention mechanism 2. The baffle 22 is connected to the arc-shaped hinge frame 21 by hinges and can move up and down around the hinge point to form an obstacle for the flow of liquid. The bracket 23 is located below the baffle 22 and is fixed to the inner wall of the filter tube body 1 to support the entire mechanism. The bottom end of the support spring 24 is fixed to the bracket 23, and the top end is fixed to the push block 25 to provide elastic force to keep the baffle 22 in a certain position. When the pressure is high, it is compressed to allow the liquid to pass through, and when the downward pressure is low, it rebounds to prevent the liquid from flowing back. The push block 25 controls the position of the baffle 22 through the elastic force of the support spring 24. The limiter 26 is used to limit the spacing of the baffle 22 to ensure that the baffle 22 moves within a certain range. When the fluid passes through the filter bag, the backflow prevention mechanism 2 controls the flow direction of the fluid by changing the position of the baffle 22 to prevent the filtered fluid from flowing back to the area before filtering due to pressure changes.

[0031] (2) When the filter bag is used for environmental filtration, the threaded ring 31 serves as a fixing point of the filter mechanism 3, the connecting sleeve 32 supports the entire filter mechanism 3, the supporting keel 33 is fixed to the lower surface of the connecting sleeve 32 to provide structural support, the filter screen 34 is used to initially intercept larger particles, the primary filter layer 35 is composed of a synthetic fiber cloth layer, which is used to capture medium-sized particles, and the high-efficiency filter layer 36 is composed of a microporous filter membrane layer, which is used to capture smaller particles or microorganisms. The filtration efficiency is gradually improved by using multiple layers of filter materials.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] The standard parts used in this application document can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in this field. Therefore, this application document will no longer explain the control method and circuit connection in detail.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An anti-backflow environmentally friendly filter bag, comprising a filter tube body (1), characterized in that: The inner walls on the left and right sides of the filter tube body (1) are provided with anti-backflow mechanisms (2) for preventing liquid backflow, and the inner wall of the filter tube body (1) is provided with a filtering mechanism (3) for multi-layer filtering; The backflow prevention mechanism (2) comprises two arc-shaped hinged frames (21), two baffles (22), two brackets (23), two support springs (24), two push blocks (25) and a stopper (26). The two arc-shaped hinged frames (21) are respectively fixed to the left and right inner walls of the filter tube body (1). The two baffles (22) are respectively hinged to the two arc-shaped hinged frames (21). The two brackets (23) are respectively fixed to the left and right inner walls of the filter tube body (1) and are located below the baffles (22). The bottom ends of the two support springs (24) are respectively fixed to the upper surfaces of the two brackets (23) in an inclined manner. The two push blocks (25) are respectively fixed to the lower surfaces of the two baffles (22). The top ends of the two support springs (24) are respectively fixed to the lower surfaces of the two push blocks (25). The stopper (26) is arranged on the left and right inner walls of the filter tube body (1) to limit the upward turning distance of the two baffles (22).

2. The anti-backflow environmentally friendly filter bag according to claim 1, characterized in that: The limiting member (26) comprises two slide rails (261), a limiting ring (262) and two fixing frames (263); the two slide rails (261) are respectively fixed to the left and right inner walls of the filter tube body (1); the limiting ring (262) is slidably connected to the outside of the two slide rails (261); and the two fixing frames (263) are respectively fixed to the left and right sides of the upper surface of the limiting ring (262).

3. The anti-backflow environmentally friendly filter bag according to claim 2, characterized in that: The two fixing frames (263) are respectively slidably connected to the outer sides of the two slide rails (261); fixing screw holes are provided on the outer sides of the fixing frames (263); and locking bolts (264) are threadedly connected to the inner walls of the fixing screw holes.

4. The anti-backflow environmentally friendly filter bag according to claim 1, characterized in that: The two baffles (22) are both semicircular in shape, and sealing pads are fixed on opposite sides of the two baffles (22).

5. The anti-backflow environmentally friendly filter bag according to claim 2, characterized in that: The fixing frame (263) is in a U-shape, and the distance between the inner walls on the front and rear sides of the fixing frame (263) is equal to the width of the slide rail (261).

6. The anti-backflow environmentally friendly filter bag according to claim 1, characterized in that: The filtering mechanism (3) comprises a threaded ring (31), a connecting sleeve (32), a supporting keel (33), a filter screen (34), a primary filter layer (35) and a high-efficiency filter layer (36); the threaded ring (31) is threadedly connected to the inner wall of the filter tube body (1); the connecting sleeve (32) is fixed to the bottom end of the threaded ring (31); the supporting keel (33) is fixed to the lower surface of the connecting sleeve (32); the filter screen (34) is fixed to the outer side of the supporting keel (33); the primary filter layer (35) is sleeved on the outer side of the filter screen (34); and the high-efficiency filter layer (36) is sleeved on the outer side of the primary filter layer (35).

7. The anti-backflow environmentally friendly filter bag according to claim 6, characterized in that: The primary filter layer (35) is a synthetic fiber cloth layer, and the high-efficiency filter layer (36) is a microporous filter membrane layer.

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