Polytetrafluoroethylene filter element

Abstract

The utility model relates to the technical field of filter elements, and discloses a polytetrafluoroethylene filter element, which comprises a barrel, a filter element with an open top and a closed bottom is arranged on the inner side of the barrel, an upper cover is arranged on the top of the barrel, and a mounting mechanism for mounting the filter element and the upper cover is arranged on the inner side of the barrel. A non-return mechanism used for preventing media from flowing back is further arranged on the inner side of the cylinder body. Through the arrangement of the cylinder body, the filter element, the upper cover, the mounting mechanism and the non-return mechanism, a user can mount the filter element through the mounting mechanism, and meanwhile, the problem of backflow can be avoided through the non-return mechanism, so that the filter element can be conveniently disassembled and assembled, and the sealing effect is greatly improved through the arrangement of a sealing groove and a sealing ring. According to the filter element, the problem of seepage when the water flow is too large is avoided, the structure is simple, the practicability is high, and meanwhile, the non-return effect can be achieved, so that the problem that a non-return valve needs to be additionally arranged is avoided, and the function of the filter element is further improved while the practicability is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter elements, and in particular to a polytetrafluoroethylene filter element. Background Art

[0002] Polytetrafluoroethylene is a material with strong acid resistance and resistance to various organic solvents. It is almost insoluble in all solvents and is also resistant to high temperatures. From the material point of view, the polytetrafluoroethylene filter element medium is a polytetrafluoroethylene membrane with excellent performance, wide chemical applicability, biological safety and pyrogen control. It has two unique hydrophobic and hydrophilic properties. Therefore, polytetrafluoroethylene is usually used to manufacture filter elements. The hydrophobicity is mainly used for gas filtration to achieve sterility, large flux, high temperature resistance, strong acid and alkali resistance, and wide chemical applicability. It is suitable for fermentation tanks, carbon dioxide, nitrogen, and compressed air. When used for gas filtration, it can intercept various bacteriophages, bacteria and particles above 0.02um. The hydrophilicity is used for liquid filtration to achieve sterility, wide chemical applicability, strong acid and alkali resistance, and high ozone intensity.

[0003] During the use of existing polytetrafluoroethylene filter elements, since the filter elements are generally directly installed inside the housing by means of snaps, there is a problem that the connection between the filter element and the housing is not tight enough, and leakage may easily occur at the connection when the water flow is large, thereby affecting the filtering effect of the filter element on the liquid. In addition, the existing filter element does not have a check valve effect, resulting in the user needing to install an additional check valve when used in a pipeline to avoid the problem of medium backflow. This method reduces the functionality and practicality of the filter element. Utility Model Content

[0004] The purpose of the utility model is to provide a polytetrafluoroethylene filter element to solve the problem that, during the use of existing polytetrafluoroethylene filter elements, the filter element is generally directly installed inside the shell by means of snaps, etc., and the connection between the filter element and the shell is not tight enough. When the water flow is large, leakage at the connection point may occur, thereby affecting the filtering effect of the filter element on the liquid. In addition, the existing filter element does not have a check valve effect, resulting in the user needing to install an additional check valve when used in a pipeline to avoid the backflow of the medium. This method reduces the functionality and practicality of the filter element.

[0005] The utility model provides the following technical solution: a polytetrafluoroethylene filter element, comprising a cylinder, a filter element with an open top and a closed bottom is arranged on the inner side of the cylinder, an upper cover is arranged on the top of the cylinder, an installation mechanism for installing the filter element and the upper cover is arranged on the inner side of the cylinder, and a non-return mechanism for preventing medium backflow is also arranged on the inner side of the cylinder.

[0006] As a preferred embodiment of the above technical solution, the installation mechanism includes a first external thread provided on the outside of the cylinder and a second external thread provided on the outside of the upper cover, as well as a sealing groove provided on the top of the cylinder and a gathering plate fixedly connected to the inner side of the upper cover, the inner side of the second external thread is threadedly connected to a fixing sleeve, the inner side of the sealing groove is plugged with a sealing ring, the bottom of the gathering plate is fixedly connected to a connecting pipe, the outer side of the connecting pipe is provided with a third external thread, the inner side of the third external thread is threadedly connected to a sleeve, and the filter element is fixedly connected to the bottom of the sleeve. When in use, the user can connect the sleeve and the connecting pipe through the inner internal thread of the sleeve and the third external thread on the outer side of the connecting pipe. At this time, the installation of the filter element is completed, and then the sealing ring at the bottom of the upper cover is tightened. Insert it into the sealing groove on the top of the cylinder, and then install the fixing sleeve at the connection between the upper cover and the cylinder through the internal thread on the inner side and the first external thread on the outside of the cylinder, as well as the second external thread on the outside of the upper cover. At this time, the installation of the upper cover and the cylinder is completed. Then the user installs the water inlet pipe through the water inlet pipe and the connecting flange on the outside of the upper cover, and then installs the water outlet pipe through the connecting flange on the outside of the water outlet pipe. Later, when in use, the medium enters the upper cover through the water inlet pipe, then enters the connecting pipe through the gathering plate, and then enters the filter element. The medium is filtered by the filter element and discharged through the water outlet pipe, thereby facilitating the installation of the filter element while avoiding leakage problems, thereby improving practicality.

[0007] As a preferred embodiment of the above technical solution, the length of the first external thread and the second external thread is the same as the width of the fixing sleeve, and the specifications of the first external thread and the second external thread are the same. An internal thread that is compatible with the specifications of the first external thread and the second external thread is provided on the inner side of the fixing sleeve. The fixing sleeve is threadedly connected to the upper cover and the cylinder through the internal thread, the first external thread and the second external thread. The sealing ring is fixedly connected to the bottom of the upper cover, and the size of the sealing ring is compatible with the sealing groove.

[0008] As a preferred embodiment of the above technical solution, the sleeve is connected to the filter element, and the inner side of the sleeve is provided with an internal thread that is compatible with the third external thread specification. The sleeve is threadably connected to the connecting pipe through the internal thread and the third external thread. The size of the sleeve is compatible with the connecting pipe. The top of the upper cover is also fixedly connected to a water inlet pipe and a connecting flange for connecting the water inlet pipe.

[0009] As a preferred embodiment of the above technical solution, the non-return mechanism includes a water outlet pipe fixedly connected to the bottom of the cylinder, a fixing ring is fixedly connected to the inner side of the water outlet pipe, four through holes distributed at equal angles are opened on the fixing ring, a sliding rod is slidably connected to the inner side of the through hole, the top of the sliding rod is fixedly connected to the limiting plate, the end of the sliding rod away from the baffle passes through the fixing ring and is fixedly connected to the baffle, the inner side of the baffle is fixedly connected to a sealing plug, and the bottom of the limiting plate is fixedly connected to a spring. When in use, the user can install the filter element through the installation mechanism, and then when in use, the medium enters the upper cover and the cylinder through the water inlet pipe, and then is filtered by the filter element inside the cylinder. , and discharged through the outlet pipe at the bottom of the cylinder. During this process, the medium will impact the baffle and sealing plug at the bottom of the fixed ring after being filtered. At this time, the sealing plug will drive the sliding rod to move, and the movement of the sliding rod will drive the limit plate to move. The movement of the limit plate will squeeze the spring, and the sealing plug will move to a certain position and separate from the fixed ring. At this time, the medium can flow into the outlet pipe through the space between the sealing plug and the fixed ring, and then flow out. When not in use, the sealing plug on the baffle will return to its original position under the influence of the spring force, and the sliding rod will drive the baffle and the sealing plug to move. At this time, the sealing plug can be inserted into the fixed ring to seal the cylinder, thereby achieving a non-return effect.

[0010] As a preferred embodiment of the above technical solution, the position of the water outlet pipe corresponds to the water inlet pipe, and the outside of the water outlet pipe is fixedly connected with a connecting flange for connecting the water outlet pipe. The number of sliding rods, limit plates, sliding rods and springs is the same as the through holes. The four sliding rods are respectively slidably connected to the inner sides of the four through holes, one end of the four sliding rods is respectively fixedly connected to the four limit plates, and the other ends of the four sliding rods are respectively passed through the four through holes and fixedly connected to the baffles. The baffles are distributed on the side of the fixing ring close to the connecting flange, the outer diameter of the sealing plug is adapted to the inner aperture of the fixing ring, one end of the four springs is respectively fixedly connected to the bottom of the four limit plates, and the other ends of the four springs are all fixedly connected to the fixing ring, and the four springs are respectively distributed on the outsides of the four sliding rods.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model is provided with a cylinder, a filter element, an upper cover, an installation mechanism and a non-return mechanism. During installation, the user can connect the sleeve at the top of the filter element with the connecting pipe through the internal thread inside the sleeve and the third external thread outside the connecting pipe. At this time, the installation of the filter element is completed. Then, the sealing ring at the bottom of the upper cover is inserted into the sealing groove at the top of the cylinder. Then, the fixing sleeve is installed at the connection between the upper cover and the cylinder through the internal thread inside the sleeve and the first external thread outside the cylinder and the second external thread outside the upper cover. At this time, the installation of the upper cover and the cylinder is completed. Then, the user installs the water inlet pipe through the water inlet pipe and the connecting flange outside the upper cover, and then installs the water outlet pipe through the connecting flange outside the water outlet pipe. Later, when in use, the medium enters the upper cover through the water inlet pipe, then enters the connecting pipe through the gathering plate, and then enters the filter element. The medium is filtered by the filter element and discharged through the outlet pipe. In this process, After the medium is filtered, it will impact the baffle and sealing plug at the bottom of the fixing ring. At this time, the sealing plug will drive the sliding rod to move, and the movement of the sliding rod will drive the movement of the limit plate. The movement of the limit plate will squeeze the spring, and the sealing plug will move to a certain position and separate from the fixing ring. At this time, the medium can flow into and out of the water pipe through the space between the sealing plug and the fixing ring, and then flow out. When not in use, the sealing plug on the baffle will return to its original position under the influence of the spring force. At this time, the sliding rod drives the baffle and the sealing plug to move. At this time, the sealing plug can be inserted into the fixing ring to seal the cylinder, thereby achieving a non-return effect, which makes it easy to disassemble and assemble the filter element. The setting of the sealing groove and the sealing ring avoids the problem of seepage when the water flow is too large, and has a simple structure and strong practicality. At the same time, it can also achieve a non-return effect, thereby avoiding the problem of needing to set up an additional check valve, further improving practicality while further improving the function of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of a polytetrafluoroethylene filter element from a first perspective;

[0014] Figure 2 A schematic diagram of a polytetrafluoroethylene filter element from a second perspective;

[0015] Figure 3 It is an overall side cross-sectional view of a polytetrafluoroethylene filter element;

[0016] Figure 4 This is a top-sectional view of the local structure of a polytetrafluoroethylene filter element;

[0017] Figure 5 for Figure 3 A schematic diagram of the structure at center A;

[0018] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0019] In the figure: 1. Cylinder; 2. Filter element; 3. Upper cover; 11. First external thread; 12. Second external thread; 13. Sealing groove; 14. Fixing sleeve; 15. Sealing ring; 16. Collecting plate; 17. Connecting pipe; 18. Third external thread; 19. Sleeve; 21. Outlet pipe; 22. Fixing ring; 23. Through hole; 24. Sliding rod; 25. Limiting plate; 26. Baffle; 27. Sealing plug; 28. Spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Example 1

[0022] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the utility model provides a technical solution: a polytetrafluoroethylene filter element, comprising a cylinder 1, a filter element 2 with an open top and a closed bottom is provided on the inner side of the cylinder 1, an upper cover 3 is provided on the top of the cylinder 1, a mounting mechanism for mounting the filter element 2 and the upper cover 3 is provided on the inner side of the cylinder 1, and a non-return mechanism for preventing medium backflow is also provided on the inner side of the cylinder 1, the mounting mechanism comprises a first external thread 11 provided on the outer side of the cylinder 1 and a second external thread 12 provided on the outer side of the upper cover 3, a sealing groove 13 provided on the top of the cylinder 1 and a gathering plate 16 fixedly connected to the inner side of the upper cover 3, the inner side of the second external thread 12 is threadedly connected to a fixing sleeve 14, the inner side of the sealing groove 13 is plugged with a sealing ring 15, the bottom of the gathering plate 16 is fixedly connected to a connecting pipe 17, the outer side of the connecting pipe 17 is provided with a third external thread 18, and the inner side of the third external thread 18 is threadedly connected to a sleeve 19 The filter element 2 is fixedly connected to the bottom of the sleeve 19, the length of the first external thread 11 and the second external thread 12 is the same as the width of the fixing sleeve 14, and the specifications of the first external thread 11 and the second external thread 12 are the same. The inner side of the fixing sleeve 14 is provided with an internal thread that is adapted to the specifications of the first external thread 11 and the second external thread 12. The fixing sleeve 14 is threadedly connected to the upper cover 3 and the cylinder body 1 through the internal thread, the first external thread 11 and the second external thread 12. The sealing ring 15 is fixedly connected to the bottom of the upper cover 3, and the size of the sealing ring 15 is adapted to the sealing groove 13. The sleeve 19 is communicated with the filter element 2, and the inner side of the sleeve 19 is provided with an internal thread that is adapted to the specifications of the third external thread 18. The sleeve 19 is threadedly connected to the connecting pipe 17 through the internal thread and the third external thread 18. The size of the sleeve 19 is adapted to the connecting pipe 17. The top of the upper cover 3 is also fixedly connected to a water inlet pipe and a connecting flange for connecting the water inlet pipe.

[0023] Through the above technical solution, when in use, the user can connect the sleeve 19 on the top of the filter element 2 with the connecting tube 17 through the internal thread on the inner side thereof and the third external thread 18 on the outer side of the connecting tube 17. At this time, the installation of the filter element 2 is completed. Then, the sealing ring 15 at the bottom of the upper cover 3 is inserted into the sealing groove 13 at the top of the cylinder 1. Then, the fixing sleeve 14 is installed at the connection between the upper cover 3 and the cylinder 1 through the internal thread on the inner side thereof and the first external thread 11 on the outer side of the cylinder 1, as well as the second external thread 12 on the outer side of the upper cover 3. At this time, the installation of the upper cover 3 and the cylinder 1 is completed. Thereafter, the user installs the water inlet pipe through the water inlet pipe and the connecting flange outside the upper cover 3, and then installs the water outlet pipe 21 through the connecting flange outside the water outlet pipe 21. Thereafter, when in use, the medium enters the upper cover 3 through the water inlet pipe, then enters the connecting pipe 17 through the collecting plate 16, and then enters the filter element 2. The medium is filtered by the filter element 2 and then discharged through the water outlet pipe 21, thereby facilitating the installation of the filter element 2 while avoiding leakage problems, thereby improving practicality.

[0024] Example 2

[0025] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, the utility model provides a technical solution: a polytetrafluoroethylene filter element, comprising a cylinder 1, a filter element 2 with an open top and a closed bottom is provided on the inner side of the cylinder 1, a top cover 3 is provided on the top of the cylinder 1, a mounting mechanism for mounting the filter element 2 and the top cover 3 is provided on the inner side of the cylinder 1, a non-return mechanism for preventing backflow of the medium is also provided on the inner side of the cylinder 1, the non-return mechanism comprises an outlet pipe 21 fixedly connected to the bottom of the cylinder 1, a fixing ring 22 is fixedly connected to the inner side of the outlet pipe 21, four through holes 23 distributed at equal angles are opened on the fixing ring 22, a sliding rod 24 is slidably connected to the inner side of the through hole 23, the top of the sliding rod 24 is fixedly connected to the limiting plate 25, the end of the sliding rod 24 away from the baffle 26 passes through the fixing ring 22 and is fixedly connected to the baffle 26, the inner side of the baffle 26 is fixedly connected to the sealing plug 27, and the bottom of the limiting plate 25 is fixed A spring 28 is fixedly connected, the position of the water outlet pipe 21 corresponds to the water inlet pipe, and the outside of the water outlet pipe 21 is fixedly connected to a connecting flange for connecting the water outlet pipe 21. The number of sliding rods 24, limiting plates 25, sliding rods 24 and springs 28 are the same as the through holes 23. The four sliding rods 24 are respectively slidably connected to the inner sides of the four through holes 23, one end of the four sliding rods 24 is respectively fixedly connected to the four limiting plates 25, and the other ends of the four sliding rods 24 pass through the four through holes 23 and are fixedly connected to the baffles 26. The baffles 26 are distributed on the side of the fixing ring 22 close to the connecting flange. The outer diameter of the sealing plug 27 is adapted to the inner aperture of the fixing ring 22. One end of the four springs 28 is respectively fixedly connected to the bottom of the four limiting plates 25, and the other ends of the four springs 28 are all fixedly connected to the fixing ring 22. The four springs 28 are respectively distributed on the outsides of the four sliding rods 24.

[0026] When the filter element 2 is not in use, the user can install the filter element 2 through the installation mechanism. After that, when in use, the medium enters the upper cover 3 and the cylinder body 1 through the water inlet pipe, and then is filtered by the filter element 2 inside the cylinder body 1 and discharged through the water outlet pipe 21 at the bottom of the cylinder body 1. In this process, the medium will impact the baffle 26 and the sealing plug 27 at the bottom of the fixing ring 22 after being filtered. At this time, the sealing plug 27 will drive the sliding rod 24 to move, and the movement of the sliding rod 24 will drive the limit plate 25 to move. The movement of the limit plate 25 will squeeze the spring 28, and the sealing plug 27 will move to a certain position and separate from the fixing ring 22. At this time, the medium can flow into the water outlet pipe 21 through the space between the sealing plug 27 and the fixing ring 22, and then flow out. When not in use, the sealing plug 27 on the baffle 26 will return to its original position under the influence of the elastic force of the spring 28, and the sliding rod 24 will drive the baffle 26 and the sealing plug 27 to move. At this time, the sealing plug 27 can be inserted into the fixing ring 22 to seal the cylinder body 1, thereby achieving the non-return effect.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A polytetrafluoroethylene filter element, comprising a cylinder (1), wherein a filter element (2) with an open top and a closed bottom is provided inside the cylinder (1), characterized in that: An upper cover (3) is provided on the top of the cylinder (1), an installation mechanism for installing the filter element (2) and the upper cover (3) is provided on the inside of the cylinder (1), and a non-return mechanism for preventing backflow of the medium is also provided on the inside of the cylinder (1).

2. A polytetrafluoroethylene filter element according to claim 1, characterized in that: The mounting mechanism comprises a first external thread (11) provided on the outside of the cylinder (1) and a second external thread (12) provided on the outside of the upper cover (3), a sealing groove (13) provided on the top of the cylinder (1) and a gathering plate (16) fixedly connected to the inside of the upper cover (3), the inner side of the second external thread (12) is threadedly connected to a fixing sleeve (14), the inner side of the sealing groove (13) is plugged with a sealing ring (15), the bottom of the gathering plate (16) is fixedly connected to a connecting pipe (17), the outer side of the connecting pipe (17) is provided with a third external thread (18), the inner side of the third external thread (18) is threadedly connected to a sleeve (19), and the filter element (2) is fixedly connected to the bottom of the sleeve (19).

3. A polytetrafluoroethylene filter element according to claim 2, characterized in that: The lengths of the first external thread (11) and the second external thread (12) are the same as the width of the fixing sleeve (14), and the specifications of the first external thread (11) and the second external thread (12) are the same. An internal thread matching the specifications of the first external thread (11) and the second external thread (12) is provided on the inner side of the fixing sleeve (14). The fixing sleeve (14) is threadedly connected to the upper cover (3) and the cylinder (1) through the internal thread, the first external thread (11) and the second external thread (12). The sealing ring (15) is fixedly connected to the bottom of the upper cover (3), and the size of the sealing ring (15) is matched with the sealing groove (13).

4. The polytetrafluoroethylene filter element according to claim 2, characterized in that: The sleeve (19) is connected to the filter element (2), and the inner side of the sleeve (19) is provided with an internal thread that matches the specification of the third external thread (18). The sleeve (19) is threadedly connected to the connecting pipe (17) through the internal thread and the third external thread (18). The size of the sleeve (19) is matched with that of the connecting pipe (17). The top of the upper cover (3) is also fixedly connected to a water inlet pipe and a connecting flange for connecting the water inlet pipe.

5. The polytetrafluoroethylene filter element according to claim 1, characterized in that: The non-return mechanism comprises a water outlet pipe (21) fixedly connected to the bottom of the cylinder (1); a fixing ring (22) is fixedly connected to the inner side of the water outlet pipe (21); four through holes (23) distributed at equal angles are provided on the fixing ring (22); a sliding rod (24) is slidably connected to the inner side of the through hole (23); the top of the sliding rod (24) is fixedly connected to a limiting plate (25); the end of the sliding rod (24) away from the baffle (26) passes through the fixing ring (22) and is fixedly connected to the baffle (26); a sealing plug (27) is fixedly connected to the inner side of the baffle (26); and a spring (28) is fixedly connected to the bottom of the limiting plate (25).

6. The polytetrafluoroethylene filter element according to claim 5, characterized in that: The position of the water outlet pipe (21) corresponds to the water inlet pipe, and the outside of the water outlet pipe (21) is fixedly connected with a connecting flange for connecting the water outlet pipe (21). The number of the sliding rods (24), the limiting plates (25), the sliding rods (24) and the springs (28) is the same as that of the through holes (23). The four sliding rods (24) are respectively slidably connected to the inner sides of the four through holes (23). One end of the four sliding rods (24) is respectively fixedly connected to the four limiting plates (25), and the other end of the four sliding rods (24) is fixedly connected to the four limiting plates (25). The four springs (28) are respectively passed through four through holes (23) and fixedly connected to the baffle (26). The baffle (26) is distributed on the side of the fixing ring (22) close to the connecting flange. The outer diameter of the sealing plug (27) is adapted to the inner hole diameter of the fixing ring (22). One end of the four springs (28) is respectively fixedly connected to the bottom of the four limit plates (25), and the other ends of the four springs (28) are all fixedly connected to the fixing ring (22). The four springs (28) are respectively distributed on the outside of the four slide bars (24).

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