Basket filter

Abstract

The utility model relates to the technical field of catalyst slurry filtering equipment, and discloses a basket filter. The basket filter comprises a barrel, a barrel cover and a filter basket, the barrel is provided with a first flange located at the top, the barrel cover comprises a second flange and a feeding pipe, the feeding pipe is communicated with the interior of the filter basket, the filter basket is provided with a filter basket flange located at the top, and the filter basket flange is located between the first flange and the second flange and matched with the first flange and the second flange to jointly seal the filter basket. The mounting position of the filter basket flange is transferred to the position between the first flange and the second flange, so that the sealing surface between the filter basket and the cylinder body can be uniformly subjected to the action of force from the cylinder cover, and materials are prevented from permeating from the sealing surface between the filter basket and the cylinder body and being discharged through the discharging pipe under the condition that the materials are not filtered; and the feeding pipe is adaptively arranged on the barrel cover to be communicated with the interior of the filter basket, so that the sealing performance of the sealing surface between the filter basket and the barrel body is effectively improved on the basis of not influencing the filtering process.

Description

TECHNICAL FIELD

[0001] The utility model relates to catalyst slurry filtering equipment technical field, concretely relates to a basket filter. BACKGROUND

[0002] Filter is widely used in each field in modern production, in order to protect fluid conveying equipment, improve product purity, remove impurities, and all need to use filter. Basket filter is widely used in petrochemical industry and catalyst preparation industry because of its characteristics of large filter area.

[0003] Generally speaking, the filter basket of the existing basket filter is detachably arranged, so that the filter basket can be regularly disassembled and cleaned and maintained, to avoid excessive accumulation of impurities in the filter basket with the increase of filtration time, which leads to the decrease of flow rate and affects the filtration efficiency on the one hand, and causes secondary pollution to the filtered fluid on the other hand. On this basis, if the basket filter is also required to be applicable to materials with high filtration requirements, it is necessary to ensure that the sealing surface between the filter basket and the cylinder in the working state has good sealing performance.

[0004] However, the sealing surface between the filter basket and the cylinder of the existing basket filter (such as CN221287131U, CN220939372U, etc.) cannot achieve complete sealing effect. The specific reason is that the existing basket filter transmits force to the filter basket handle through the cylinder cover and then to the sealing surface between the filter basket and the cylinder. Due to the small force receiving area of the filter basket handle and the processing error, the force finally acting on the sealing surface between the filter basket and the cylinder is uneven, which leads to poor sealing effect of the sealing surface between the filter basket and the cylinder. This has little effect on occasions with low filtration precision requirements, but it is a significant defect for occasions with high filtration precision requirements and must be overcome. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the problem of poor sealing effect of the sealing surface between the filter basket and the cylinder of the existing basket filter.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a basket filter, which comprises a cylinder, a cylinder cover and a filter basket. The cylinder has a first flange at the top. The cylinder cover comprises a second flange and a feed pipe. The feed pipe is connected with the inside of the filter basket. The filter basket has a filter basket flange at the top. The filter basket flange is located between the first flange and the second flange and cooperates with each other to realize the sealing of the filter basket.

[0007] Optionally, the first flange and the second flange are both protruding flanges.

[0008] Optionally, sealing gaskets are arranged between the first flange and the filter basket flange and between the filter basket flange and the second flange.

[0009] Optionally, the first flange and the second flange are connected by a plurality of fastening bolts.

[0010] Optionally, the filter basket is internally provided with a filter basket handle.

[0011] Optionally, the side and bottom of the filter basket cylinder are uniformly provided with a plurality of round holes.

[0012] Optionally, the side of the cylinder is provided with a discharge pipe.

[0013] Optionally, the side of the cylinder is provided with a slag discharge pipe.

[0014] Optionally, the cylinder, the cylinder cover and the filter basket are all made of stainless steel.

[0015] Through the above technical solution, the installation position of the filter basket flange is transferred to between the first flange and the second flange and cooperates with the first flange and the second flange, so as to ensure that the sealing surface between the filter basket and the cylinder and the sealing surface between the cylinder can be uniformly subjected to the force from the cylinder cover, effectively improve the sealing property of the sealing surface between the filter basket and the cylinder, avoid the material from the sealing surface between the filter basket and the cylinder to penetrate and be discharged through the discharge pipe without being filtered, and adaptively set the feeding pipe on the cylinder cover to communicate the inside of the filter basket, and finally effectively improve the sealing property of the sealing surface between the filter basket and the cylinder without affecting the filtering process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional structure schematic view of the basket filter;

[0017] Figure 2 is a side view structure schematic view of the basket filter;

[0018] Figure 3 is a top view structure schematic view of the basket filter;

[0019] Figure 4 is a top view structure schematic view of the filter basket;

[0020] Figure 5 is a cross-sectional structure schematic view of the filter basket.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1, cylinder; 11, first flange; 12, discharge pipe; 13, slag discharge pipe; 2, cylinder cover; 21, second flange; 22, feeding pipe; 3, filter basket; 31, filter basket flange; 32, filter basket handle; 33, filter basket cylinder; 34, filter screen DETAILED DESCRIPTION

[0023] In the utility model, in the case that no opposite statement is made, the orientation words such as ''upper, lower, left, right, top, bottom, side'' used are usually understood in combination with the orientation shown in the attached drawings and actual application, and ''inner, outer'' refers to the inner and outer of the outline of the component.

[0024] In order to enable those skilled in the art to have a deeper understanding of the unique technical concept of the utility model, the following will be accompanied by appropriate description of some creative labor and analysis performed by the utility model in the research and development process in the process of describing the specific embodiment and preferred embodiment of the utility model basket filter.

[0025] As described above, the key factor for whether the basket filter can be applied to the material with high filtration requirement is the sealing property of the sealing surface between the filter basket and the cylinder. The present inventors found that the filtered spherical alumina carrier acidizing material is difficult to smoothly pass through the 0.4mm-0.8mm needle in the subsequent drop ball process and thus frequently blocks the needle when using the existing basket filter to filter the spherical alumina carrier acidizing material. In this regard, the inventors analyzed the filtered spherical alumina carrier acidizing material, and the analysis result shows that the filtered spherical alumina carrier acidizing material still contains larger impurity particles, which indicates that the filtration effect achieved in the filtration stage is poor. Subsequently, the inventors further analyzed the structures of the basket filter used, and found that the filter screen does not deform and the mesh number of the filter screen is also sufficient in theory to prevent larger impurity particles from passing through, so the larger impurity particles found in the filtered spherical alumina carrier acidizing material can only be leaked from the sealing surface between the filter basket and the cylinder.

[0026] In this case, if the filter basket structure of the prior art is limited, the mode of continuing to transmit force to the filter basket handle of the filter basket and then to the sealing surface between the filter basket and the cylinder by the cylinder cover, the sealing surface between the filter basket and the cylinder is difficult to be uniformly stressed, thereby effectively preventing the leakage phenomenon. For this reason, the utility model has undergone multiple structural modifications and tests in the research and development process, and finally formed a basket filter with a sealing surface between the filter basket and the cylinder.

[0027] As Figures 1-2 shown, the utility model discloses a kind of basket filters, including cylinder 1, cylinder cover 2 and filter basket 3, cylinder 1 has the first flange 11 in top, cylinder cover 2 includes second flange 21 and feed pipe 22, feed pipe 22 is connected with the inside of filter basket 3, filter basket 3 has filter basket flange 31 in top, filter basket flange 31 is located between first flange 11 and second flange 21 and each other cooperates to realize the sealing of filter basket 3 jointly.

[0028] In order to make the sealing surface between the filter basket and the cylinder body bear uniform force, the filter basket 3 is vertically arranged in the cylinder body 1, at this time the filter basket flange 31 is supported on the first flange 11 and is subjected to the vertical downward pressure of the second flange 21. Specifically, the filter basket flange 31 and the second flange 21 and the filter basket flange 31 and the first flange 11 are in surface-to-surface contact, wherein the upper surface of the filter basket flange 31 is subjected to the vertical downward pressure of the lower surface of the second flange 21, and the lower surface of the filter basket flange 31 is subjected to the vertical upward reaction force of the upper surface of the first flange 11, the three are in static equilibrium and the sealing surface between the filter basket and the cylinder body is in a completely sealed state.

[0029] Optionally, the first flange 11 and the second flange 21 are both protruding flanges.

[0030] Specifically, the upper surface of the first flange 11 and the lower surface of the second flange 21 are both convex planes, and since the contact area is relatively reduced, the pressure between the sealing surfaces is greater under the condition that the vertical downward pressure of the second flange 21 is unchanged, which helps to achieve better sealing effect.

[0031] Optionally, sealing gaskets are arranged between the first flange 11 and the filter basket flange 31 and between the filter basket flange 31 and the second flange 21.

[0032] Specifically, the sealing gasket will be elastically or plastically deformed after being subjected to force, thereby filling the micro-unevenness of the lower surface of the second flange 21, the upper surface of the filter basket flange 31, the lower surface of the filter basket flange 31 and the upper surface of the first flange 11, effectively preventing material from leaking through each contact surface. When the sealing gasket is matched with the protruding flange, the deformation of the sealing gasket on the sealing gasket will be more concentrated, which is conducive to further improving the sealing performance.

[0033] Preferably, the sealing gasket can be a concave-convex gasket, which usually consists of a pair of gaskets, one of which is convex and the other of which is concave. The design of the concave-convex gasket allows the gasket not to be easily squeezed out when the flange is tightened, and can provide better sealing effect.

[0034] Specifically, the fitting mode when the second flange 21, the filter basket flange 31 and the concave-convex gasket arranged therebetween are used together is taken as an example for description (the first flange 11, the filter basket flange 31 and the concave-convex gasket arranged therebetween are fitted in the same way). The bottom surface of the convex gasket is in surface-to-surface contact with one of the lower surface of the second flange 21 or the upper surface of the filter basket flange 31, the convex surface of the convex gasket is in contact with the concave surface of the concave-convex gasket, and the bottom surface of the concave-convex gasket is in surface-to-surface contact with the other of the lower surface of the second flange 21 or the upper surface of the filter basket flange 31. At this time, the convex surface of the convex gasket and the concave surface of the concave-convex gasket form a "concave-convex" fit, which ensures that the gasket will not be squeezed out under high pressure, and due to the concave-convex structure design, the offset of the gasket during tightening of the flanges can be reduced, thereby ensuring the close contact of the sealing surface. In addition, the design of the concave-convex gasket can also reduce the erosion or corrosion of the gasket by the material, further improving the reliability of the seal. It should be noted that the installation of the concave-convex gasket needs to be accurately centered to ensure the correct position of the gasket and uniform load distribution.

[0035] Optionally, the first flange 11 and the second flange 21 are connected by a plurality of fastening bolts. As shown in the figure, the plurality of fastening bolts are all tightened with the same pre-tightening force, which helps to avoid the risk of leakage due to uneven pre-tightening force. Figure 3

[0036] Optionally, the filter basket 3 is internally provided with a filter basket handle 32.

[0037] The function of the filter basket handle 32 is to facilitate the disassembly of the filter basket 3 for regular cleaning and maintenance of the filter basket 3. As shown in the figure, Figure 1 and Figure 4 The filter basket handle 32 is arranged inside the filter basket 3, which can support the filter basket flange 31 to be located between the first flange 11 and the second flange 21 and cooperate with each other to jointly realize the sealing of the filter basket 3 in structure, that is, the setting position of the filter basket handle 32 is the inevitable result of adaptive adjustment (the feed pipe 22 of the utility model also includes the cover 2 based on this reason).

[0038] Optionally, the filter basket 3 comprises a filter basket cylinder 33 and a filter screen 34.

[0039] Specifically, as shown in the figure, Figure 5 ​As shown, the top opening of the filter basket cylinder 33, the filter basket flange 31 is welded to the opening edge of the filter basket cylinder 33, and the filter screen 34 is welded to the inside of the filter basket cylinder 33, which is conducive to the stability of the overall structure. Among them, the filter screen 34 is mainly used to filter the material entering the inside of the filter basket 3 through the feed pipe 22; the filter basket cylinder 33 is mainly used to support the filter screen 34 to prevent it from deforming. Because the filter screen 34 is usually thin, it needs to be used together with the thicker filter basket cylinder 33 to ensure that the overall mechanical strength of the filter basket 3 is sufficient to withstand high working pressure and backwashing pressure. The filter basket cylinder 33 reduces the wear of the filter screen 34 and improves its durability; on the other hand, it prevents the filter screen 34 from being offset, deformed or damaged due to the impact of larger particles or hard objects, and ensures its stability and integrity. In short, the filter basket cylinder 33 and the filter screen 34 together ensure the efficient and stable operation of the basket filter.

[0040] Optionally, the side and bottom of the filter basket cylinder 33 are uniformly distributed with a plurality of round holes.

[0041] Specifically, the opening design on the filter basket cylinder 33 is mainly to connect the filter screen and the discharge pipe 12, or in other words, to connect the feed pipe 22 and the discharge pipe 12, so that the filtered material can be smoothly discharged from the discharge pipe 12. If necessary, the plurality of round holes uniformly distributed on the outer surface of the filter basket cylinder 33 can also assist in filtration, and the diameter of the round holes is set to a certain size (less than the mesh number of the filter screen, to filter more accurately), and particles larger than the diameter of the round holes are intercepted, thereby forming a double-layer filter together with the filter screen to improve the filtering effect. Of course, the round hole is only a common design and not the only design, and square holes, triangular holes or special-shaped holes can also be opened according to actual needs.

[0042] Optionally, the side of the cylinder 1 is provided with a discharge pipe 12. Specifically, the discharge pipe 12 does not have to be arranged on the side of the cylinder 1, and according to different specific working conditions, especially considering the overall structure layout and space factors, the discharge pipe 12 can also be arranged on the bottom of the cylinder 1 or at different positions in the vertical direction on the side of the cylinder 1.

[0043] Optionally, the side of the cylinder 1 is provided with a discharge pipe 13.

[0044] Specifically, the main function of the residue discharge pipe 13 is to discharge impurities and liquid accumulated inside the filter during cleaning or residue discharge. The residue discharge pipe 13 facilitates maintenance and cleaning of the basket filter, allowing the operator to quickly discharge waste without disassembling the basket filter, easily clean the deposits inside the filter, thereby prolonging the service life of the filter and maintaining its high efficiency. Regular use of the residue discharge pipe 13 to clean the deposits can effectively prevent the basket filter from being clogged, ensuring normal flow and filtration effect of the fluid. In addition, discharging waste through the residue discharge pipe 13 can effectively reduce the pressure inside the basket filter, reducing the risk of equipment damage caused by excessive pressure.

[0045] Optionally, the cylinder body 1, the cylinder cover 2, and the filter basket 3 are all made of stainless steel. The cylinder body 1, the cylinder cover 2, and the filter basket 3 made of stainless steel have good strength, durability, corrosion resistance, etc., and can adapt to various chemical media, ensuring long-term stable operation of the basket filter in various media.

[0046] Hereinafter, the principle and working process of the basket filter will be described by taking the optimal embodiment of the present application as an example.

[0047] In a normal state, the filter screen 3 is vertically located in the cylinder body, the filter basket flange 31 at the top thereof is located between the oppositely arranged first flange 11 and second flange 21, and a set of concave-convex surface gaskets are arranged between the filter basket flange 31 and the first flange 11 and between the filter basket flange 31 and the second flange 21. The first flange 11 and the second flange 21 are connected by a plurality of fastening bolts providing the same pre-tightening force and uniformly distributed. The pre-tightening force of the fastening bolts is ultimately uniformly transmitted to the surface of the filter basket flange 31 through the gaskets and realizes sealing.

[0048] Filtering process: The material enters the inside of the filter basket 3 through the feed pipe 22, and further completes double filtration through the filter screen 34 and the round holes of the filter basket cylinder 33, and the filtered material is discharged through the discharge pipe 12.

[0049] Residue discharge process: Before formal residue discharge, the operator needs to check all connection parts of the basket filter to ensure good sealing to prevent leakage during residue discharge. After confirming that the sealing surface is normal, the valve of the feed pipe 22 is closed to ensure that no material enters the basket filter, then the valve of the discharge pipe 12 is closed to prevent the material from being discharged from the discharge pipe 12 when the pressure changes, and also to avoid the backflow of pollutants into the filtered material, and finally the valve of the residue discharge pipe 13 is opened for residue discharge.

[0050] Cleaning process: after the residue is discharged, the filter basket 3 of the basket filter usually needs to be cleaned to remove the impurities attached to the filter basket 3. At this time, the fastening bolts between the first flange 11 and the second flange 21 need to be completely disassembled, then the barrel cover 2 is opened and the filter basket 3 is taken out by using the filter basket handle 32, and the filter basket 3 taken out is cleaned outside the basket filter, and if necessary, the barrel 1 should be cleaned after the filter basket 3 is taken out.

[0051] Restart process: first, install and adjust the concave-convex surface gasket on the first flange 11 to ensure that the concave-convex surface gasket is installed accurately centered; second, place the filter basket flange 31 of the cleaned filter basket 3 on the concave-convex surface gasket and install the concave-convex surface gasket on the filter basket flange 31; third, align the second flange 21 with the concave-convex surface gasket on the filter basket flange 31 and cover the barrel cover 2; fourth, tighten the multiple fastening bolts between the first flange 11 and the second flange 21 by using the constant torque fastening technology to ensure the sealing performance of each sealing surface, especially the sealing performance of the sealing surface between the filter basket and the barrel; fifth, repeat the filtering process.

[0052] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited thereto. Within the technical concept of the present application, the technical solution of the present application can be subjected to various simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present application will not be described again for various possible combination manners. However, these simple modifications and combinations should also be regarded as the disclosed content of the present application, and all belong to the protection scope of the present application.

Claims

1. A basket filter characterized by, The filter comprises a cylinder (1), a cylinder cover (2) and a filter basket (3), the cylinder (1) has a first flange (11) at the top, the cylinder cover (2) comprises a second flange (21) and a feeding pipe (22), the feeding pipe (22) is communicated with the inside of the filter basket (3), the filter basket (3) has a filter basket flange (31) at the top, the filter basket flange (31) is between the first flange (11) and the second flange (21) and cooperates with each other to realize the sealing of the filter basket (3).

2. The basket filter of claim 1, wherein, The first flange (11) and the second flange (21) are both protruding flanges.

3. The basket filter according to claim 1 or 2, characterized in that Sealing gaskets are arranged between the first flange (11) and the filter basket flange (31) and between the filter basket flange (31) and the second flange (21).

4. The basket strainer of claim 1, wherein, The first flange (11) and the second flange (21) are connected by a plurality of fastening bolts.

5. The basket strainer of claim 1, wherein, The filter basket (3) is internally provided with a filter basket handle (32).

6. The basket filter according to claim 1 or 5, characterized in that The filter basket (3) comprises a filter basket cylinder (33) and a filter screen (34).

7. The basket filter of claim 6, wherein, The side and bottom of the filter basket cylinder (33) are uniformly provided with a plurality of round holes.

8. The basket strainer of claim 1, wherein, The side of the cylinder (1) is provided with a discharging pipe (12).

9. The basket strainer of claim 1, wherein, The side of the cylinder (1) is provided with a slag discharging pipe (13).

10. The basket strainer of claim 1, wherein, The cylinder (1), the cylinder cover (2) and the filter basket (3) are all made of stainless steel.

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