Negative pressure tank for vacuum filtration of superfine fibers

Abstract

The utility model discloses a negative pressure tank for vacuum suction filtration of superfine fibers, and belongs to the technical field of suction filtration tank devices. A negative pressure tank for superfine fiber vacuum filtration comprises a tank body, a liquid inlet pipe, a discharge pipe, a negative pressure pipe and a liquid outlet pipe are arranged on the tank body, and the negative pressure tank further comprises a filter plate connected in the tank body; the rotating shaft is rotationally connected into the tank body; when negative-pressure suction filtration is carried out, liquid rapidly flows to drive the arc-shaped plate to rotate, external air is continuously sucked through cooperation of the arc-shaped plate and the piston cylinder, the air enters the air bag, the air bag is expanded, the space in the tank body is reduced through expansion of the air bag, and therefore negative-pressure suction filtration is carried out. Under the condition that the negative pressure suction capacity is constant, the strength of the negative pressure can be increased to a certain extent, and gas in the follow-up air bag can be reversely blown, so that calcium sulfate fibers on the filter plate are blown up and can be smoothly discharged through the discharge pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum filtration tank devices, and in particular to a negative pressure tank for vacuum filtration of ultrafine fibers. Background Technology

[0002] Negative pressure tanks are typically composed of parts and components such as a cylinder, end caps, flanges, connecting pipes, sealing elements, and supports. They are connected to a vacuum pump, which extracts air from the tank when it is working, creating a negative pressure environment inside the tank. This creates a pressure difference between the inside and outside of the tank. Under the action of this pressure difference, the liquid to be filtered is drawn into the tank, while solid impurities in the liquid are trapped on the filter membrane or filter. The filtrate then flows out through the outlet, achieving solid-liquid separation.

[0003] In the preparation of calcium sulfate, vacuum filtration devices are commonly used for solid-liquid separation. However, due to the extremely fine nature of calcium sulfate fibers, a high negative pressure value is required for the negative pressure tube. Otherwise, it is easy for the liquid to have difficulty passing through the filter plate piled with calcium sulfate fibers. Therefore, a negative pressure tank for vacuum filtration of ultrafine fibers is provided to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a negative pressure tank for vacuum filtration of ultrafine fibers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A negative pressure tank for vacuum filtration of ultrafine fibers includes a tank body, wherein the tank body is provided with an inlet pipe, a outlet pipe, a negative pressure pipe, and an outlet pipe, and further includes:

[0007] A filter plate is connected inside the tank.

[0008] A rotating shaft is rotatably connected to the tank body, with one end of the rotating shaft located inside the liquid outlet pipe;

[0009] The blade is fixedly connected to one end of the rotating shaft located in the liquid outlet pipe;

[0010] An arc-shaped plate is fixedly connected to the rotating shaft, and multiple sets of arc-shaped protrusions are evenly spaced on the arc-shaped plate;

[0011] Multiple sets of piston cylinders are fixedly connected to the tank body. The telescopic rod of the piston cylinder abuts against the arc-shaped plate, and an air outlet pipe is connected to the air outlet end of the piston cylinder.

[0012] An airbag is fixedly connected to the tank body. The airbag is located below the filter plate. By rotating the arc plate, the piston cylinder can continuously inject gas into the airbag through the air outlet pipe, thereby reducing the space inside the tank.

[0013] Preferably, a rotating rod is rotatably connected inside the tank, and the rotating rod is located below the filter plate.

[0014] For subsequent backflushing and discharge, preferably, the rotating rod is provided with multiple sets of inclined exhaust holes, and the air bag is connected to a pressure relief pipe with an electronic valve. The pressure relief pipe is connected to the exhaust holes, and the rotating rod can be rotated by the air discharged through the exhaust holes.

[0015] Preferably, an intake pipe is connected to the intake end of the piston cylinder, and the intake pipe passes through the tank body.

[0016] Preferably, mounting bracket one and mounting bracket two are fixedly connected inside the tank, and the rotating shaft is rotatably connected to mounting bracket one.

[0017] Preferably, the rotating rod is rotatably connected to the second mounting bracket.

[0018] Preferably, a rotating block is fixedly connected to the rotating rod, and the rotating block is rotatably connected to the mounting bracket two. The rotating block is coaxially arranged with the filter plate.

[0019] Compared with the prior art, this utility model provides a negative pressure tank for vacuum filtration of ultrafine fibers, which has the following beneficial effects:

[0020] This invention utilizes the rapid flow of liquid during negative pressure filtration to drive the rotation of an arc-shaped plate. Through the interaction between the arc-shaped plate and the piston cylinder, external gas is continuously drawn in, entering the air bladder and causing it to expand. This expansion reduces the internal space of the tank, increasing the intensity of the negative pressure to a certain extent while maintaining a constant suction capacity. Furthermore, the gas in the air bladder can be backflushed, lifting the calcium sulfate fibers on the filter plate and allowing them to be smoothly discharged through the discharge pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a negative pressure tank for vacuum filtration of ultrafine fibers proposed in this utility model;

[0022] Figure 2 A cross-sectional view of a negative pressure tank for vacuum filtration of ultrafine fibers proposed in this utility model. Figure 1 ;

[0023] Figure 3 A cross-sectional view of a negative pressure tank for vacuum filtration of ultrafine fibers proposed in this utility model. Figure 2 ;

[0024] Figure 4 This invention proposes a negative pressure tank for vacuum filtration of ultrafine fibers. Figure 3A schematic diagram of the structure of part A;

[0025] Figure 5 This invention proposes a negative pressure tank for vacuum filtration of ultrafine fibers. Figure 3 A schematic diagram of the structure of part B.

[0026] In the diagram: 1. Tank body; 101. Mounting bracket one; 102. Mounting bracket two; 2. Filter plate; 301. Rotating shaft; 302. Paddle blade; 303. Arc plate; 4. Piston cylinder; 401. Air inlet pipe; 402. Air outlet pipe; 5. Airbag; 501. Pressure relief pipe; 6. Rotating rod; 601. Exhaust port; 602. Rotating block; 701. Liquid inlet pipe; 702. Discharge pipe; 703. Negative pressure pipe; 704. Liquid outlet pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example:

[0029] Reference Figure 1-5A negative pressure tank for vacuum filtration of ultrafine fibers includes a tank body 1, on which an inlet pipe 701, a discharge pipe 702, a negative pressure pipe 703, and an outlet pipe 704 are provided. It also includes: a filter plate 2 connected inside the tank body 1; a rotating shaft 301 rotatably connected inside the tank body 1, with one end of the rotating shaft 301 located inside the outlet pipe 704; a paddle 302 fixedly connected to the end of the rotating shaft 301 located inside the outlet pipe 704; an arc-shaped plate 303 fixedly connected to the rotating shaft 301, with multiple sets of arc-shaped protrusions evenly spaced on the arc-shaped plate 303; multiple piston cylinders 4, all fixedly connected inside the tank body 1, with the telescopic rod of the piston cylinder 4 abutting against the arc-shaped plate 303, and an outlet pipe 402 connected to the outlet end of the piston cylinder 4; and an air bladder 5 fixedly connected inside the tank body 1, located below the filter plate 2. The rotation of the arc-shaped plate 303 allows the piston cylinders 4 to continuously... Gas is injected into the airbag 5 through the air outlet pipe 402, thereby reducing the space inside the tank 1. A rotating rod 6 is rotatably connected inside the tank 1. The rotating rod 6 is located below the filter plate 2 and has multiple sets of inclined exhaust holes 601. A pressure relief pipe 501 with an electronic valve is connected to the airbag 5. The pressure relief pipe 501 is connected to the exhaust holes 601. The exhaust of gas through the exhaust holes 601 enables the rotating rod 6 to rotate. An air inlet pipe 401 is connected to the air inlet end of the piston cylinder 4 and passes through the tank 1. Mounting bracket 101 and mounting bracket 2 102 are fixedly connected inside the tank 1. The rotating shaft 301 is rotatably connected to mounting bracket 101, and the rotating rod 6 is rotatably connected to mounting bracket 2 102. A rotating block 602 is fixedly connected to the rotating rod 6 and is rotatably connected to mounting bracket 2 102. The rotating block 602 is coaxially arranged with the filter plate 2.

[0030] When using this device, first connect the negative pressure pipe 703 to the vacuum pump, start the vacuum pump to extract the air from the tank, creating a negative pressure environment inside the tank. At this time, the liquid to be filtered enters the tank 1 through the inlet pipe 701. Under the action of negative pressure, the liquid passes through the filter plate 2, while the calcium sulfate fiber is trapped on the filter plate 2. The filtrate flows out through the outlet pipe 704. When the filtrate flows out of the outlet pipe 704, the flowing liquid drives the paddle 302 to rotate, and the paddle 302 drives the rotating shaft 301 to rotate. The arc-shaped plate 303 on the rotating shaft 301 rotates accordingly. During rotation, the arc-shaped protrusion continuously pushes the telescopic rod of the piston cylinder 4 to reciprocate. When the telescopic rod extends outward, the piston cylinder 4 draws in air from the outside through the air inlet pipe 401. When the telescopic rod retracts inward, the piston cylinder 4 injects the drawn-in air into the air bag 5 through the air outlet pipe 402. As the gas is continuously injected, the air bag 5 gradually expands, reducing the space inside the tank 1. Under the condition of constant negative pressure suction capacity, the negative pressure intensity is increased due to the reduction of the internal space of the tank 1, which helps the liquid to pass more smoothly through the filter plate 2 with calcium sulfate fiber, thereby improving the filtration efficiency.

[0031] After a period of use, to prevent excessive gas from entering the airbag 5 and causing damage, a pressure valve can be installed inside the airbag 5. When the pressure is about to reach the threshold, the electronic valve in the pressure relief pipe 501 can be opened to release excess gas. This ensures that the airbag 5 is always inflated within a certain range, avoiding excessive expansion that could affect the filtration effect. At this time, the gas enters the exhaust port 601 of the rotating rod 6 through the pressure relief pipe 501. Since the exhaust port 601 is inclined, the gas ejected from the exhaust port 601 will generate a reaction force, causing the rotating rod 6 to rotate, thereby backflushing the filter plate 2. This effect is not good during vacuum filtration. It is suitable for use after vacuum filtration is completed, when the liquid inlet pipe 701 no longer enters liquid, the vacuum pump is turned off, and the calcium sulfate fiber is discharged through the discharge pipe 702. By expelling all the gas in the airbag 5 and backflushing, the calcium sulfate fiber can be discharged quickly.

[0032] This invention utilizes the rapid flow of liquid during negative pressure filtration to drive the rotation of the arc-shaped plate 303. Through the cooperation of the arc-shaped plate 303 and the piston cylinder 4, external gas is continuously drawn in, entering the air bladder 5 and causing it to expand. This expansion reduces the internal space of the tank 1, increasing the negative pressure intensity to a certain extent while maintaining a constant suction capacity. Furthermore, the gas in the air bladder 5 can be backflushed, blowing up the calcium sulfate fibers on the filter plate 2 so that they can be smoothly discharged through the discharge pipe 702.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A negative pressure tank for vacuum filtration of ultrafine fibers, comprising a tank body (1), wherein the tank body (1) is provided with an inlet pipe (701), a discharge pipe (702), a negative pressure pipe (703), and an outlet pipe (704), characterized in that, Also includes: A filter plate (2) is connected inside the tank (1); A rotating shaft (301) is rotatably connected inside the tank body (1), and one end of the rotating shaft (301) is located inside the liquid outlet pipe (704); The blade (302) is fixedly connected to one end of the rotating shaft (301) located in the outlet pipe (704); An arc-shaped plate (303) is fixedly connected to the rotating shaft (301), and multiple sets of arc-shaped protrusions are provided at equal intervals on the arc-shaped plate (303); Multiple sets of piston cylinders (4) are fixedly connected inside the tank body (1). The telescopic rod of the piston cylinder (4) abuts against the arc plate (303). An air outlet pipe (402) is connected to the air outlet end of the piston cylinder (4). An airbag (5) is fixedly connected inside the tank (1). The airbag (5) is located below the filter plate (2). By rotating the arc plate (303), the piston cylinder (4) can continuously inject gas into the airbag (5) through the air outlet pipe (402), thereby reducing the space inside the tank (1).

2. The negative pressure tank for ultrafine fiber vacuum filtration according to claim 1, characterized in that, A rotating rod (6) is rotatably connected inside the tank (1), and the rotating rod (6) is located below the filter plate (2).

3. A negative pressure tank for ultrafine fiber vacuum filtration according to claim 2, characterized in that, The rotating rod (6) is provided with multiple sets of inclined exhaust holes (601), and the airbag (5) is connected to a pressure relief pipe (501) with an electronic valve. The pressure relief pipe (501) is connected to the exhaust holes (601), and the rotating rod (6) can be rotated by the air outlet of the exhaust holes (601).

4. A negative pressure tank for ultrafine fiber vacuum filtration according to claim 1, characterized in that, An air inlet pipe (401) is connected to the air inlet end of the piston cylinder (4), and the air inlet pipe (401) passes through the tank body (1).

5. A negative pressure tank for ultrafine fiber vacuum filtration according to claim 3, characterized in that, The tank body (1) is fixedly connected with mounting bracket one (101) and mounting bracket two (102), and the rotating shaft (301) is rotatably connected to mounting bracket one (101).

6. A negative pressure tank for ultrafine fiber vacuum filtration according to claim 5, characterized in that, The rotating rod (6) is rotatably connected to the mounting bracket (102).

7. A negative pressure tank for ultrafine fiber vacuum filtration according to claim 6, characterized in that, A rotating block (602) is fixedly connected to the rotating rod (6). The rotating block (602) is rotatably connected to the mounting bracket (102). The rotating block (602) is coaxially arranged with the filter plate (2).

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