Filter element of suction filtration kettle

Abstract

The utility model provides a filter element of a suction filtration kettle, and belongs to the technical field of filter elements. The problem that an existing filter element is low in filtering efficiency is solved. The filter element of the suction filtration kettle comprises a sintering pipe with micropores and a non-porous pipe located in the sintering pipe, the open end of the sintering pipe is fixedly connected with a connector, the top end of the non-porous pipe is fixedly connected with the connector in a sealed mode, a gap is formed between the bottom end of the non-porous pipe and the closed end of the sintering pipe, and a certain distance is formed between the outer circumferential wall of the non-porous pipe and the inner circumferential wall of the sintering pipe. The filter element of the suction filtration kettle has the advantages that enough pressure difference exists inside and outside the filter element, and the filtering efficiency of the filter element is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter elements and relates to a filter element for a suction filtration kettle. Background Art

[0002] The filter element is the core component of the filter, used to remove impurities from fluids or gases. Depending on the application scenario, the filter element's material, structure, and filtration accuracy also vary.

[0003] Existing filter elements, such as a microporous sintered composite filter tube disclosed in Chinese patent literature [Patent No.: 91204515.9; Publication No.: CN2093690U], are suitable for water purification, especially for use as a filter element for high-purity water. The filter element includes a water inlet tube body and a tube bottom. The entire tube body is covered with micropores, and the inner or outer wall of the tube at the water inlet is provided with internal or external threads.

[0004] In this filter tube structure, liquid enters the tube through micropores, intercepting solid particles and achieving solid-liquid separation. However, under certain operating conditions, the bottom of the filter tube is in the solid-liquid mixture, while the top of the filter tube is exposed outside the solid-liquid mixture. Since the top of the filter tube also has micropores, this creates a short circuit regardless of whether suction or pressure filtration is used. The pressure differential between the inside and outside of the filter tube is small, the liquid flow rate is slow, and the filtration efficiency is low. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems existing in the prior art and to propose a filter element for a suction filtration kettle. The technical problem solved is how to ensure sufficient pressure difference between the inside and outside of the filter element and improve the filtering efficiency of the filter element.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a filter element for a suction filtration kettle, comprising a sintered tube with micropores, the open end of the sintered tube being fixedly connected to a joint, characterized in that the filter element also comprises a non-porous tube located in the sintered tube, the top end of the non-porous tube being sealed and fixedly connected to the joint, a gap being provided between the bottom end of the non-porous tube and the closed end of the sintered tube, and a certain distance being provided between the outer peripheral wall of the non-porous tube and the inner peripheral wall of the sintered tube.

[0007] This filter element is provided with a non-porous tube in a sintered tube. The bottom ends of the sintered tube and the non-porous tube are embedded below the liquid surface. The sintered tube has micropores. The liquid in the solid-liquid mixture can enter the sintered tube through the micropores. The non-porous tube has no micropores. Therefore, the liquid entering the sintered tube can only enter the non-porous tube through the gap between the bottom end of the non-porous tube and the closed end of the sintered tube. When the liquid is filtered or pressure filtered, there is a sufficient pressure difference between the inside and outside of the filter element, which accelerates the flow rate of the liquid and thus improves the filtration efficiency of the filter element.

[0008] In the filter element of the above-mentioned suction filtration kettle, the sintered tube and the non-porous tube are both circular, and the central axis of the sintered tube coincides with the central axis of the non-porous tube. This structure ensures smooth liquid flow and a stable filter element structure.

[0009] In the aforementioned filter element for a vacuum filtration kettle, the connector includes an annular retaining ring protruding toward the sintered tube. The top end of the non-porous tube is embedded within the retaining ring, and the outer circumferential wall of the top end of the non-porous tube is affixed and fixedly connected to the inner circumferential wall of the retaining ring. This structure facilitates the secure connection between the non-porous tube and the connector.

[0010] In the aforementioned filter element for a vacuum filtration kettle, the wall thickness of the non-porous tube is thinner than that of the sintered tube. The sintered tube, due to its micropores, is thicker, providing sufficient strength. The non-porous tube, lacking micropores, is thinner, yet still maintains sufficient strength. Furthermore, the non-porous tube occupies less space, thereby increasing the flow rate of the liquid and improving the filtration efficiency of the filter element.

[0011] In the filter element of the above-mentioned suction filtration kettle, the inner wall of the joint has an internal thread or the outer wall of the joint has an external thread. This structure allows the filter element to be fixedly connected by threaded connection, making the filter element easy to install.

[0012] In the filter element of the above-mentioned suction filtration kettle, the distance between the bottom end of the non-porous tube and the closed end of the sintered tube is between 10-20 mm.

[0013] In the filter element of the above-mentioned suction filtration kettle, the distance between the outer peripheral wall of the non-porous tube and the inner peripheral wall of the sintered tube is between 2-4 mm.

[0014] In the above-mentioned filter element of the suction filtration kettle, the suction filtration kettle includes a kettle body and a filtering structure, the filtering structure includes a fixed cylinder, a fixed plate and several filter elements arranged at intervals, the fixed cylinder is sealed and fixedly connected to the kettle body, the tops of all the filter elements are fixedly connected to the fixed cylinder, the bottoms of the filter elements extend into the kettle body, and the bottoms of all the filter elements are fixedly connected to the kettle body through the fixed plate.

[0015] Compared with the prior art, the filter element of the filtration kettle provided by the utility model has the following advantages:

[0016] 1. This filter element sets a non-porous tube without micropores in a sintered tube with micropores, so that when the liquid is filtered or pressed, there is a sufficient pressure difference between the inside and outside of the filter element, which accelerates the flow rate of the liquid and improves the filtration efficiency of the filter element.

[0017] 2. This filter element is used in the suction filtration kettle. The filter element is installed stably and has high filtration efficiency, which improves the filtration efficiency of the suction filtration kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the filter element used in the filtration kettle.

[0019] Figure 2 It is a cross-sectional view of the overall structure of this filter element.

[0020] Figure 3 This filter Figure 2 Magnified view of area A.

[0021] In the figure, 1, sintered tube; 2, joint; 21, fixed ring; 3, non-porous tube; 4, kettle body; 5, filtering structure; 51, fixed cylinder; 52, fixed plate; 53, filter element. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, the suction filtration kettle includes a kettle body 4 and a filtering structure 5. The filtering structure 5 includes a fixed cylinder 51, a fixed plate 52 and filter elements 53 arranged at intervals. The fixed cylinder 51 is sealed and fixedly connected to the kettle body 4. The tops of all filter elements 53 are fixedly connected to the fixed cylinder 51. The bottoms of the filter elements 53 extend into the kettle body 4. The bottoms of all filter elements 53 are fixedly connected to the kettle body 4 through the fixed plate 52.

[0024] like Figure 2 As shown, the filter element 53 includes a sintered tube 1, a joint 2 and a non-porous tube 3. The sintered tube 1 has micropores, and the non-porous tube 3 has no micropores. The non-porous tube 3 is located in the sintered tube 1. The wall thickness of the non-porous tube 3 is less than the wall thickness of the sintered tube 1. The sintered tube 1 and the non-porous tube 3 are both circular tubes, and the central axis of the sintered tube 1 coincides with the central axis of the non-porous tube 3.

[0025] The joint 2 is fixedly connected to the open end of the sintered tube 1. In this embodiment, the outer wall of the joint 2 has an external thread. In actual production, the inner wall of the joint 2 has an internal thread. Figure 3As shown, the joint 2 has an annular fixing ring 21 protruding toward the sintered tube 1. The top of the non-porous tube 3 is embedded in the fixing ring 21, and the outer peripheral wall of the top of the non-porous tube 3 is fixedly connected to the inner peripheral wall of the fixing ring 21. There is a gap between the bottom end of the non-porous tube 3 and the closed end of the sintered tube 1. In this embodiment, the distance between the bottom end of the non-porous tube 3 and the closed end of the sintered tube 1 is 15 mm. In actual production, the distance between the bottom end of the non-porous tube 3 and the closed end of the sintered tube 1 can be 10 mm or 20 mm. There is a certain distance between the outer peripheral wall of the non-porous tube 3 and the inner peripheral wall of the sintered tube 1. In this embodiment, the distance between the outer peripheral wall of the non-porous tube 3 and the inner peripheral wall of the sintered tube 1 is 3 mm. In actual production, the distance between the outer peripheral wall of the non-porous tube 3 and the inner peripheral wall of the sintered tube 1 can be 2 mm or 4 mm.

[0026] During operation, the negative pressure device connected to the joint 2 generates negative pressure, causing the liquid in the solid-liquid mixture to enter the sintered tube 1 through the micropores, and then enter the non-porous tube 3 through the gap between the bottom end of the non-porous tube 3 and the closed end of the sintered tube 1, and finally be discharged through the joint 2.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0028] Although this document frequently uses terms such as sintered tube 1, joint 2, retaining ring 21, non-porous tube 3, kettle body 4, filtration structure 5, retaining cylinder 51, retaining plate 52, and filter element 53, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A filter element for a suction filtration kettle, comprising a sintered tube (1) with micropores, wherein the open end of the sintered tube (1) is fixedly connected to a joint (2), characterized in that: The filter element (53) further comprises a non-porous tube (3) located in the sintered tube (1), the top end of the non-porous tube (3) being sealed and fixedly connected to the joint (2), a gap being provided between the bottom end of the non-porous tube (3) and the closed end of the sintered tube (1), and a certain distance being provided between the outer peripheral wall of the non-porous tube (3) and the inner peripheral wall of the sintered tube (1).

2. The filter element of the suction filtration kettle according to claim 1, characterized in that: The sintered tube (1) and the non-porous tube (3) are both in the shape of circular tubes, and the central axis of the sintered tube (1) and the central axis of the non-porous tube (3) coincide with each other.

3. The filter element of the suction filtration kettle according to claim 1, characterized in that: The joint (2) has a ring-shaped fixing ring (21) protruding toward the sintered tube (1); the top end of the non-porous tube (3) is embedded in the fixing ring (21), and the outer peripheral wall of the top end of the non-porous tube (3) is fixedly connected to the inner peripheral wall of the fixing ring (21).

4. A filter element for a suction filtration kettle according to claim 1, 2 or 3, characterized in that: The wall thickness of the non-porous tube (3) is smaller than the wall thickness of the sintered tube (1).

5. The filter element of the suction filtration kettle according to claim 1, 2 or 3, characterized in that: The inner wall of the joint (2) has an internal thread, or the outer wall of the joint (2) has an external thread.

6. A filter element for a suction filtration kettle according to claim 1, 2 or 3, characterized in that: The distance between the bottom end of the non-porous tube (3) and the closed end of the sintered tube (1) is between 10 and 20 mm.

7. A filter element for a suction filtration kettle according to claim 1, 2 or 3, characterized in that: The distance between the outer peripheral wall of the non-porous tube (3) and the inner peripheral wall of the sintered tube (1) is between 2 and 4 mm.

8. The filter element of the suction filtration kettle according to claim 1, 2 or 3, characterized in that: The suction filtration kettle comprises a kettle body (4) and a filtering structure (5), wherein the filtering structure (5) comprises a fixed cylinder (51), a fixed plate (52) and a plurality of filter elements (53) arranged at intervals, wherein the fixed cylinder (51) is sealed and fixedly connected to the kettle body (4), the tops of all the filter elements (53) are fixedly connected to the fixed cylinder (51), the bottoms of the filter elements (53) extend into the kettle body (4), and the bottoms of all the filter elements (53) are fixedly connected to the kettle body (4) via the fixed plate (52).

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