Filter with slag washing prevention function

Abstract

The utility model discloses a filter with a slag washing prevention function, which belongs to the technical field of filters, and comprises a filter shell, a filter element, a drain outlet and a cover plate mounted on the drain outlet, the drain outlet is formed at the bottom of a Y-shaped branch part of the filter shell, the filter element comprises a filter basket, and the filter basket is arranged on the filter shell. The filter basket forms a cylindrical filter screen on the inner side of the Y-shaped branch of the filter shell, and the filter element is characterized in that the filter element comprises a concave surface filter screen arranged at the lower part of the filter basket, an inner pocket cavity is formed between the concave surface filter screen and the bottom of the filter basket, and a through funnel hole communicated with the inner pocket cavity is formed in the middle of the concave surface filter screen. According to the filter with the slag washing prevention function, the durability, the reliability and the operation efficiency of the filter are remarkably improved by reducing eddy current, avoiding impurity washing and collecting iron slag.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and particularly relates to a filter with a slag erosion prevention function. Background Art

[0002] Filters are of great significance in fluid pipeline engineering. They can effectively remove solid impurities in liquids or gases, protect key equipment in the pipeline system such as pumps, valves, and instruments from blockage and wear, thereby extending the service life of the equipment, reducing maintenance costs, and improving the operating efficiency of the system. In addition, filters can also ensure the purity of the fluid medium, meet the requirements of the process flow for the fluid quality, and enhance the safety and reliability of the entire pipeline system.

[0003] The Y-type filter is a protection device used in fluid pipeline systems. It is named after its "Y"-shaped housing design and is widely used in the filtration of media such as water, steam, gas, and petroleum. Its structure is simple and compact. When installed, it is usually located at the inlet of pumps, valves, or other equipment to prevent solid impurities in the pipeline from entering the system and causing damage or blockage. The working principle of the Y-type filter is that when the fluid enters the filter from the inlet, it passes through the filter element (usually a metal filter screen or filter basket) located inside the Y-shaped branch. The impurities in the fluid are intercepted, and the clean fluid is discharged from the outlet. When the impurities accumulate to a certain extent, they can be cleaned through the drain port located at the bottom of the Y-shaped branch to maintain the working efficiency of the filter and the stable operation of the pipeline system.

[0004] Although the Y-type filter is widely used for the protection of pipeline systems in practical applications, there are still some deficiencies and disadvantages in its long-term operation, which affect its performance and service life.

[0005] First of all, the Y-type filter needs to be cleaned regularly. Since impurities gradually accumulate on the filter element, if not cleaned in time, the flow capacity of the filter will be greatly reduced, resulting in a decline in the system operation efficiency or even blockage.

[0006] Secondly, eddies are likely to form in the Y-shaped branch part of the Y-type filter. These eddies will cause iron slag or other hard impurities to accumulate in the filter for a long time, and continuously rotate in the eddies, and continuously scour and impact the cover plate of the filter, as Figure 3 . The long-term scouring will exacerbate the wear of the cover plate, resulting in rapid aging of the cover plate. This grinding effect not only weakens the strength of the cover plate, but also reduces the sealing performance of the cover plate, thereby causing filter leakage.

[0007] Secondly, due to the influence of the eddy current with iron slag impurities inside the filter, the service life of the cover plate and the seal is often shorter than expected, which means that frequent replacement and maintenance are required. If this wear is not dealt with in a timely manner, leaks may occur in the filter itself or even the entire pipeline system, affecting the normal operation of the equipment. Especially under high-pressure or high-temperature working conditions, leaks will lead to more serious consequences, such as a drop in system pressure, fluid loss, and even potential safety hazards. Summary of the Invention

[0008] Aiming at the problems existing in the prior art, the present utility model provides a filter with a slag erosion prevention function, which aims to solve the problems of wear, leakage, and inconvenient maintenance caused by imperfect filter screen design and eddy current in the actual application of the Y-type filter.

[0009] The present utility model is implemented as follows. A filter with slag erosion prevention includes a filter housing, a filter element, a sewage outlet, and a cover plate installed at the sewage outlet. The sewage outlet is formed at the bottom of the Y-shaped branch of the filter housing. The filter element includes a filter basket, and the filter basket forms a cylindrical filter screen inside the Y-shaped branch of the filter housing. It is characterized in that: the filter element includes a concave filter screen provided at the lower part of the filter basket, an inner pocket cavity is formed between the concave filter screen and the bottom of the filter basket, and a central through funnel hole communicating with the inner pocket cavity is provided in the middle of the concave filter screen.

[0010] In the above technical solution, preferably, the concave filter screen is a conical concave surface, the central through funnel hole is provided at the conical top of the conical concave surface, and filter holes are evenly distributed on the conical concave surface.

[0011] In the above technical solution, preferably, it includes an annular filter screen. The annular filter screen is provided at the lower part of the filter basket. The annular filter screen forms the side wall of the inner pocket cavity, and filter holes are evenly distributed on the annular filter screen.

[0012] In the above technical solution, preferably, the upper edge of the annular filter screen is connected to the concave filter screen, the lower edge of the annular filter screen is connected to the bottom filter screen, and filter holes are evenly distributed on the bottom filter screen.

[0013] In the above technical solution, preferably, the concave filter screen, the annular filter screen, and the bottom filter screen are connected to form a mesh pocket unit. The inner side of the mesh pocket unit forms the inner pocket cavity. The mesh pocket unit is fixedly installed at the lower part inside the filter basket. An outer pocket cavity surrounding the periphery of the annular filter screen is formed between the annular filter screen and the filter basket.

[0014] In the above technical solution, preferably, the radial width of the flow-through gap of the outer pocket cavity is 1-3 mm.

[0015] In the above technical solution, preferably, radially outward flange portions are provided on the upper and lower parts of the outer wall of the toroidal filter screen, and the flange portions are combined with the inner wall of the filter basket.

[0016] In the above technical solution, preferably, the concave filter screen, the toroidal filter screen and the flange portion are of an integral structure.

[0017] The filter with the function of preventing slag erosion has multiple advantages and effects, making it more efficient and durable in practical applications.

[0018] First of all, the filter adopts a new filtering structure. Especially, a concave filter screen is designed inside the filter basket to form an inner pocket cavity. This design effectively generates a fluid damping effect and significantly reduces the formation of eddy currents, as Figure 4 . Since eddy currents are the main cause of scouring and wear of the cover plate by impurities such as iron slag, the concave filter screen prevents the generation of eddy currents through the through funnel holes, thereby avoiding the rotational scouring of impurities and greatly extending the service life of the filter and its key components.

[0019] Secondly, the concave filter screen and the inner pocket cavity form a conical funnel structure. This innovative design can not only effectively capture solid impurities such as iron slag, but also collect these impurities into the pocket and no longer re-enter the system with the circulation of the fluid. This avoids secondary wear caused by repeated agitation of impurities, improves the overall efficiency of filtration, and reduces secondary damage to pipelines and equipment caused by impurity backflow. This function enables the filter to operate more efficiently and reliably when dealing with fluids containing more iron slag or other solid particles.

[0020] Generally speaking, the filter with the function of preventing slag erosion significantly improves the defects of traditional filters by reducing eddy currents, avoiding impurity scouring and extending the service life of equipment, providing a more reliable, efficient and long-life solution for industrial pipeline systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the structure of the present utility model;

[0022] Figure 2 is a structural diagram of the mesh pocket unit of the structure of the present utility model;

[0023] Figure 3 is a schematic diagram of the formation of eddy currents in the drive filter;

[0024] Figure 4 is a schematic diagram of the fluid flow of the filter of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] To solve the problems of wear, leakage and inconvenient maintenance caused by imperfect filter screen design and eddy current in the actual application of Y-type filters, the present utility model particularly provides a filter with slag erosion prevention function. This filter with slag erosion prevention function significantly improves the durability, reliability and operation efficiency of the filter by reducing eddy current, avoiding impurity erosion and collecting iron slag. To further illustrate the structure of the present utility model, the following is a detailed description in conjunction with the drawings:

[0027] Please refer to Figure 1 and Figure 2 , a filter with slag erosion prevention, including a filter housing 1, a filter element, a sewage outlet and a cover plate 2 installed at the sewage outlet. The bottom of the Y-shaped branch of the filter housing forms the sewage outlet. As is known to those skilled in the art, the structure of the Y-type filter mainly consists of a filter housing, a filter element, a sewage outlet, a cover plate and a sealing device. The housing is in a "Y" shape, with the inlet and outlet respectively connected to pipelines. The filter element is located in the Y-shaped branch and is used to intercept solid impurities. The sewage outlet is located at the bottom of the "Y" to facilitate regular cleaning of impurities. The cover plate is fixed by bolts for easy disassembly during maintenance, and a plug screw is installed on the cover plate. The sealing device is used to prevent leakage during operation and ensure the reliable operation of the filter under different working conditions.

[0028] The filter element includes a filter basket 3, and the filter basket forms a cylindrical filter screen inside the Y-shaped branch of the filter housing. The filter basket is a known accessory of the existing Y-type filter, and its axis is coaxial with the Y-shaped branch to form a filter screen between the inlet and the outlet.

[0029] The filter element further includes a concave filter screen 4 provided at the lower part of the filter basket. An inner pocket cavity 5 is formed between the concave filter screen and the bottom of the filter basket. A central through funnel hole communicating with the inner pocket cavity is provided in the middle of the concave filter screen. Specifically, the concave filter screen is a conical concave surface, and a central through funnel hole is provided at the conical top of the conical concave surface, and filter holes are evenly distributed on the conical concave surface. The top of the conical concave surface points to the cover plate to form a concave shape at the lower part of the filter basket. It also includes an annular filter screen 6, which is provided at the lower part of the filter basket. The annular filter screen forms the side wall of the inner pocket cavity, and filter holes are evenly distributed on the annular filter screen. Specifically, the upper edge of the annular filter screen is connected to the concave filter screen, and the lower edge of the annular filter screen is connected to the bottom filter screen 7, and filter holes are evenly distributed on the bottom filter screen.

[0030] In this embodiment, a concave filter screen, a toroidal filter screen, and a bottom filter screen are connected to form a mesh pocket unit. An inner pocket cavity is formed inside the mesh pocket unit. The mesh pocket unit is fixedly installed at the lower part inside the filter basket. An outer pocket cavity 8 surrounding the periphery of the toroidal filter screen is formed between the toroidal filter screen and the filter basket. The radial clearance of the outer pocket cavity, which is also the flow-through clearance, is 1 - 3 mm. Radially outward flange portions 9 are provided at the upper and lower parts of the outer wall of the toroidal filter screen, and the flange portions are combined with the inner wall of the filter basket. The concave filter screen, the toroidal filter screen, and the flange portions are of an integral structure. The flange portions are in contact with the inner wall of the filter basket and maintain a clamping force to achieve stable fixation of the mesh pocket unit inside the filter basket.

[0031] In the state where the internal pipeline of the filter flows from left to right, the mesh pocket unit inside the filter basket can reduce the eddy current formed by the fluid medium inside the Y-shaped branch of the filter, avoiding the erosion of the valve cover by hard particles such as iron slag rotating inside with the eddy current. At the same time, an inner pocket cavity is formed inside the mesh pocket unit, which can store iron slag. The concave filter screen prevents the iron slag in the pocket from being disturbed by the fluid again, further preventing the iron slag from rotating with the eddy current formed by the medium and avoiding the rapid damage of the valve cover.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filter with the function of preventing slag erosion, comprising a filter housing, a filter element, a sewage outlet and a cover plate installed at the sewage outlet. The bottom of the Y-shaped branch of the filter housing forms the sewage outlet. The filter element includes a filter basket, and the filter basket forms a cylindrical filter net inside the Y-shaped branch of the filter housing. It is characterized in that: The filter element includes a concave filter screen disposed at the lower part of the filter basket. An inner pocket cavity is formed between the concave filter screen and the bottom of the filter basket. A central through funnel hole communicating with the inner pocket cavity is provided in the middle of the concave filter screen.

2. The filter with the function of preventing slag erosion according to claim 1, wherein: The concave filter screen is a conical concave surface. The central through funnel hole is provided at the conical top of the conical concave surface. Filter holes are evenly distributed on the conical concave surface.

3. The filter with the function of preventing slag erosion according to claim 2, characterized in that: It includes an annular filter screen. The annular filter screen is disposed at the lower part of the filter basket. The annular filter screen forms the side wall of the inner pocket cavity. Filter holes are evenly distributed on the annular filter screen.

4. The filter with slag erosion prevention function according to claim 3, wherein: The upper edge of the annular filter screen is connected to the concave filter screen. The lower edge of the annular filter screen is connected to the bottom filter screen. Filter holes are evenly distributed on the bottom filter screen.

5. The filter with slag erosion prevention function according to claim 4, characterized in that: The concave filter screen, the annular filter screen and the bottom filter screen are connected to form a mesh pocket unit. The inner side of the mesh pocket unit forms the inner pocket cavity. The mesh pocket unit is fixedly installed at the inner lower part of the filter basket. An outer pocket cavity surrounding the periphery of the annular filter screen is formed between the annular filter screen and the filter basket.

6. The filter with slag erosion prevention function according to claim 5, characterized in that: The flow-through gap of the outer pocket cavity is 1-3 mm.

7. The filter with slag erosion prevention function according to claim 5, characterized in that: Radially outward flange parts are provided at the upper and lower parts of the outer wall of the annular filter screen. The flange parts are combined with the inner wall of the filter basket.

8. The filter with slag erosion prevention function according to claim 7, characterized in that: The concave filter screen, the annular filter screen and the flange parts are of an integral structure.

Images