Safety valve for vacuum filtration of superfine fibers

Abstract

The utility model discloses a safety valve for superfine fiber vacuum filtration, and relates to the field of superfine fiber production. A safety valve for superfine fiber vacuum filtration comprises a valve body, the air inlet end of the valve body is communicated with the air outlet end of a vacuum pump set through a flange plate, and the air outlet end of the valve body is communicated with the air inlet end of an exhaust pipe through a flange plate. The valve rod is rotationally connected to the position, close to the air inlet end, in the valve body; the rotating shaft is rotationally connected into the valve body through a bracket; the driving fan blade is fixedly connected to the rotating shaft; impurities are intercepted through the filter plate, and the situation that the impurities are attached to the valve element of the valve can be effectively reduced, so that the sealing performance when the valve element is closed is guaranteed, the problem of tail gas backflow caused by untight sealing of the valve element is avoided, and the stability and reliability of a vacuum filtration system are effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of ultrafine fiber production technology, specifically, it relates to a safety valve for vacuum filtration of ultrafine fibers. Background Technology

[0002] In modern industrial production, microfiber materials are widely used in many fields due to their unique physicochemical properties, such as high specific surface area and good adsorption properties. In the production process of microfiber, vacuum filtration is a key separation and purification step, which plays an important role in removing solvents and impurities from the microfiber solution and obtaining high-quality microfiber products.

[0003] In traditional microfiber vacuum filtration systems, a safety valve is usually installed on the vacuum pump unit. When the vacuum pump unit is started, this valve will function to reduce the current, which can protect the motor and prevent the motor from being damaged due to abnormal current. At the same time, when the valve is closed, it can also interrupt the exhaust gas pipeline and prevent the exhaust gas from flowing back, thereby improving the safety of the equipment during operation.

[0004] However, in actual use, during vacuum filtration, some impurities in the solution pass through the filter components of the filtration device and are discharged with the gas. When these gases mixed with impurities pass through the valve, the impurities easily adhere to the valve core, causing the valve core to close with reduced sealing, which in turn causes tail gas backflow and affects the safety of the vacuum filtration system. Therefore, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a safety valve for vacuum filtration of ultrafine fibers that can overcome or at least partially solve the above problems.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a safety valve for vacuum filtration of ultrafine fibers, including a valve body, wherein the inlet end of the valve body is connected to the outlet end of a vacuum pump group through a flange, and the outlet end of the valve body is connected to the inlet end of an exhaust pipe through a flange; further comprising: a filter plate, rotatably connected inside the valve body near the inlet end; a rotating shaft, rotatably connected inside the valve body through a bracket; and a drive fan blade, fixedly connected to the rotating shaft; the filter plate is fixedly connected to the end of the rotating shaft away from the bracket.

[0007] To facilitate more efficient interception of impurities mixed in the gas, the filter plate is further described as a conical filter plate.

[0008] To facilitate the collection of impurities thrown off during the self-cleaning of the filter plate, a slot is further provided horizontally inside the valve body near the air inlet, and an annular collection box is slidably connected inside the slot of the valve body.

[0009] To further improve the sealing between the valve body and the annular collection box, and to facilitate the removal of the annular collection box, a sealing plate is fixedly connected to one side of the annular collection box, and the sealing plate is in close contact with the outer wall of the valve body.

[0010] To facilitate the removal of impurities adhering to the inner wall of the valve body and prevent the accumulation of impurities from affecting the normal operation of the valve, furthermore, multiple scraping strips are fixedly connected in a circular pattern at equal intervals through one end of the filter plate, and the scraping strips slide against the inner wall of the valve body.

[0011] To prevent impurities from accumulating at the box opening, so that when the annular collection box is removed, the impurities at the box opening fall into the vacuum pump unit, the annular collection box is further provided with an inclined surface at the box opening.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention intercepts impurities by filter plate, which can effectively reduce the situation of impurities adhering to valve core, thereby ensuring the sealing performance when valve core is closed, avoiding the problem of tail gas backflow caused by poor valve core sealing, and effectively improving the stability and reliability of vacuum filtration system.

[0013] The self-cleaning function of the filter plate ensures smooth airflow through the filter plate, enabling the vacuum pump unit to work more efficiently, maintain a stable negative pressure environment, and improve the efficiency and quality of ultrafine fiber vacuum filtration. At the same time, the self-cleaning function also reduces the frequency of manual cleaning of the filter plate, lowers equipment maintenance costs, and improves the continuity and automation of production.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model installed on a vacuum pump unit;

[0018] Figure 3 This is a schematic diagram of the internal structure of the valve of this utility model;

[0019] Figure 4This is a cross-sectional view of the annular collection box of this utility model.

[0020] In the diagram: 1. Vacuum pump assembly; 2. Exhaust pipe; 3. Valve body; 301. Filter plate; 302. Rotating shaft; 303. Support; 304. Drive fan blade; 305. Scraper bar; 306. Annular collection box; 3061. Inclined surface; 307. Sealing plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] Example 1:

[0023] Reference Figures 1-4 A safety valve for vacuum filtration of ultrafine fibers includes a valve body 3. The inlet end of the valve body 3 is connected to the outlet end of a vacuum pump assembly 1 via a flange, and the outlet end of the valve body 3 is connected to the inlet end of an exhaust pipe 2 via a flange. The valve body 3 also includes: a filter plate 301, rotatably connected inside the valve body 3 near the inlet end; a rotating shaft 302, rotatably connected inside the valve body 3 via a bracket 303; and a drive fan blade 304, fixedly connected to the rotating shaft 302. The filter plate 301 is fixedly connected to the end of the rotating shaft 302 away from the bracket 303.

[0024] When the ultrafine fiber vacuum filtration operation begins, vacuum pump unit 1 starts up to extract air from the filtration system, creating a negative pressure environment inside the filtration device to provide power for liquid filtration, thereby performing vacuum filtration on the ultrafine fiber solution. During this process, some small impurities in the solution may pass through the filter components of the filtration device and be extracted along with the gas.

[0025] When gas containing impurities enters the valve body 3, the filter plate 301 acts as an interceptor, blocking the impurities in the gas. The gas after filtering out the impurities passes through the filter plate 301 and impacts the drive fan blade 304, causing it to rotate. Since the drive fan blade 304 is fixedly connected to the rotating shaft 302, and the rotating shaft 302 is connected to the filter plate 301, the rotation of the drive fan blade 304 will drive the filter plate 301 to rotate rapidly through the rotating shaft 302. At this time, the impurities intercepted on the surface of the filter plate 301 are thrown away under the action of centrifugal force, realizing the self-cleaning of the filter plate 301.

[0026] This safety valve intercepts impurities through the filter plate 301, which can effectively reduce the amount of impurities adhering to the valve core, thereby ensuring the sealing performance when the valve core is closed and avoiding the problem of tail gas backflow caused by poor valve core sealing, thus effectively improving the stability and reliability of the vacuum filtration system.

[0027] The self-cleaning function of filter plate 301 ensures the smooth flow of air through filter plate 301, enabling vacuum pump group 1 to work more efficiently, maintain a stable negative pressure environment, and improve the efficiency and quality of ultrafine fiber vacuum filtration. At the same time, the self-cleaning function also reduces the frequency of manual cleaning of filter plate 301, reduces equipment maintenance costs, and improves the continuity and automation of production.

[0028] Example 2:

[0029] Reference Figures 1-4 A safety valve for vacuum filtration of ultrafine fibers is basically the same as in Example 1, except that the filter plate 301 is a conical filter plate.

[0030] The filter plate 301 adopts a conical filter plate. Firstly, the conical structure increases the filtration area, which can more efficiently intercept impurities mixed in the gas, reduce the adhesion of impurities to the valve core, and ensure the valve core's sealing performance. Secondly, this shape is conducive to the rapid removal of impurities along the conical surface under the action of centrifugal force when the filter plate 301 rotates, resulting in better self-cleaning effect, ensuring smooth airflow, reducing cleaning frequency, and improving vacuum filtration efficiency and equipment stability.

[0031] Example 3:

[0032] Reference Figures 1-4 A safety valve for vacuum filtration of ultrafine fibers is basically the same as that in Example 2, but further: a slot is provided laterally inside the valve body 3 near the air inlet end, and an annular collection box 306 is sealed and slidably connected inside the slot of the valve body 3.

[0033] A sealing plate 307 is fixedly connected to one side of the annular collection box 306, and the sealing plate 307 is in close contact with the outer wall of the valve body 3.

[0034] A slot is provided at the air inlet end of the valve body 3 and connected to an annular collection box 306, and a sealing plate 307 is provided to collect the impurities thrown off by the filter plate 301 during self-cleaning, so as to avoid them accumulating in the valve and affecting its operation. At the same time, it can also prevent impurities from falling into the vacuum pump group 1, causing corrosion to the vacuum pump group 1 and affecting its service life.

[0035] Example 4:

[0036] Reference Figures 1-4A safety valve for vacuum filtration of ultrafine fibers is basically the same as in Embodiment 3, but with a further improvement: the rotating shaft 302 extends downward through one end of the filter plate 301 and is fixedly connected in a circular pattern with multiple scraping strips 305 at equal intervals. The scraping strips 305 slide against the inner wall of the valve body 3. When the rotating shaft 302 drives the filter plate 301 to rotate, the scraping strips 305 rotate synchronously, which can effectively scrape off the impurities attached to the inner wall of the valve body 3, prevent the accumulation of impurities from affecting the normal operation of the valve, maintain the cleanliness of the valve interior, ensure smooth airflow, and further improve the stability and reliability of the vacuum filtration system.

[0037] An inclined surface 3061 is provided at the opening of the annular collection box 306. The inclined surface 3061 at the opening of the annular collection box 306 can guide impurities to slide down, improve collection efficiency, and prevent some impurities from accumulating at the opening. As a result, when the annular collection box 306 is removed, the impurities at the opening fall into the vacuum pump group 1, which helps the vacuum filtration system to operate stably.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A safety valve for vacuum filtration of ultrafine fibers, characterized in that, The valve body (3) is included, with its inlet end connected to the outlet end of the vacuum pump assembly (1) via a flange, and its outlet end connected to the inlet end of the exhaust pipe (2) via a flange. The valve body (3) also includes: The filter plate (301) is rotatably connected inside the valve body (3) near the air inlet end; The rotating shaft (302) is rotatably connected inside the valve body (3) via the bracket (303); Drive fan blades (304) are fixedly connected to the rotating shaft (302); The filter plate (301) is fixedly connected to the end of the rotating shaft (302) away from the bracket (303).

2. A safety valve for ultrafine fiber vacuum filtration according to claim 1, characterized in that, The filter plate (301) is a conical filter plate.

3. A safety valve for ultrafine fiber vacuum filtration according to claim 1, characterized in that, The valve body (3) has a slot opened laterally near the air inlet end, and an annular collection box (306) is sealed and slidably connected inside the slot of the valve body (3).

4. A safety valve for ultrafine fiber vacuum filtration according to claim 3, characterized in that, A sealing plate (307) is fixedly connected to one side of the annular collection box (306), and the sealing plate (307) is in close contact with the outer wall of the valve body (3).

5. A safety valve for ultrafine fiber vacuum filtration according to claim 3, characterized in that, The rotating shaft (302) extends downward through one end of the filter plate (301) and is fixedly connected in a circular manner with multiple scraping strips (305) at equal intervals. The scraping strips (305) slide against the inner wall of the valve body (3).

6. A safety valve for ultrafine fiber vacuum filtration according to claim 5, characterized in that, The annular collection box (306) has an inclined surface (3061) at its opening.

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