Stretching device for PTFE liquid filtering membrane

Abstract

The utility model provides a stretching device for a PTFE (Polytetrafluoroethylene) liquid filtering membrane. The stretching device comprises a frame, a longitudinal telescopic piece and a guide roller assembly. The two longitudinal telescopic pieces are longitudinally and symmetrically arranged, the fixed ends of the two longitudinal telescopic pieces are fixedly connected with the top and the bottom of the frame respectively, and the movable ends of the two longitudinal telescopic pieces are oppositely arranged; the guide roller assembly comprises an extension roller, a supporting plate, a pull rod and a limiting structure. The two supporting plates are correspondingly installed at the movable ends of the longitudinal telescopic pieces. At least three extension rollers form a group, two groups of extension rollers are slidably arranged on the surfaces, deviating from the longitudinal telescopic piece, of the two supporting plates in a one-to-one correspondence manner, and each group of extension rollers is horizontally and linearly arranged; one pull rod is correspondingly arranged at two ends of one extension roller; the pull rods at the end parts of each group of extension rollers are positioned on the outer sides of the supporting plates and are in stepped distribution; limiting structures are arranged between the pull rods and the side parts of the supporting plates. According to the utility model, the adjustment requirement of a single extension roller or an integral extension roller is met, the adjustment force is improved, and more use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of PTFE filter membranes, and particularly to a stretching device for PTFE liquid filter membranes. Background Art

[0002] The PTEE liquid filter membrane has the characteristics of surface filtration mechanism and high porosity with tiny pore size, and has a very high flux that is difficult to achieve by other filter membranes. It is applicable to the filtration of strong acid and strong alkaline solutions, terminal sterilization filtration of liquid medicines, filtration of high-temperature liquids, water treatment, and environments where other filter materials are incompetent. Through mechanical stretching, a structure with special micro-fiber connected island-shaped "knots" can be achieved to meet the filtration requirements of the PTFE liquid filter membrane. Currently, a drawframe is used to stretch PTFE, but the distance between the guide rollers of the drawframe is mostly fixed and non-adjustable. Even if it can be adjusted, it is adjusted horizontally or vertically as a whole. If only the rotational speed of a single guide roller or the tension is adjusted, the overall movement of the guide rollers may not meet the adjustment requirements, and the adjustment force is limited. Content of the Utility Model

[0003] Based on this, in view of the problem that the existing stretching device cannot meet the adjustment requirements of a single guide roller, it is necessary to provide a stretching device for PTFE liquid filter membranes.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A stretching device for PTFE liquid filter membranes includes a frame, longitudinal telescopic members, and a guide roller assembly.

[0006] Two longitudinal telescopic members are symmetrically arranged longitudinally. The fixed ends of the two longitudinal telescopic members are fixedly connected to the top and bottom of the frame respectively, and the movable ends of the two longitudinal telescopic members face each other;

[0007] The guide roller assembly includes extension rollers, support plates, pull rods, and a limiting structure; two support plates are correspondingly installed at the movable ends of the longitudinal telescopic members; at least three extension rollers are in a group, and two groups of extension rollers are slidably arranged corresponding to each other on one side of the two support plates facing away from the longitudinal telescopic members, and each group of extension rollers is horizontally linearly arranged; the number of pull rods is the same as the number of extension rollers, and one pull rod is correspondingly arranged at both ends of one extension roller for driving the extension roller to slide; the pull rods at the ends of each group of extension rollers are located outside the support plates and are arranged in a stepped manner, and a limiting structure is arranged between the pull rods and the side parts of the support plates to limit the relative displacement between the pull rods and the support plates.

[0008] Further, the extension roller includes a roller tube, a support block, and a slider; both ends of the roller tube are movably connected to the support block, the top of the support block is fixedly connected with the slider, the slider is in a "T" shape, and a chute adapted to the slider is opened on the surface of the support plate along its length direction, and the slider is located in the chute.

[0009] Furthermore, the pull rod includes an L-shaped rod and a connecting rod; one end of the L-shaped rod is fixedly connected to the outside of the support block, the other end of the L-shaped rod extends horizontally outward along the length direction of the support plate, the ends of the L-shaped rods at the same horizontal height are fixedly connected to the connecting rod, and multiple connecting rods are located around the support plate and distributed longitudinally.

[0010] Furthermore, the limiting structure includes a limiting bolt; a through hole is horizontally formed on the surface of the L-shaped rod, and the length direction of the through hole is the same as the length direction of the support plate; the threaded section of the limiting bolt passes through the support plate and the through hole of the L-shaped rod and is screwed with the nut of the limiting bolt.

[0011] Furthermore, the limiting structure includes a limiting rod and a spring; a through hole is horizontally formed on the surface of the L-shaped rod, and the length direction of the through hole is the same as the length direction of the support plate; one end of the limiting rod is located in the sliding groove, the other end passes through the support plate and the through hole of the L-shaped rod and is located outside the L-shaped rod, and both ends of the limiting rod extend radially outward to form limiting ends; the spring is located in the sliding groove and between the limiting end of the limiting rod and the support plate.

[0012] Furthermore, the pull rod includes a longitudinal rod and a U-shaped rod; the longitudinal rod is fixedly connected to the outside of the support block, both ends of the U-shaped rod are respectively connected to the longitudinal rods on the same extension roller, and the bent parts of multiple U-shaped rods are located around the support plate and distributed longitudinally.

[0013] Furthermore, the limiting structure includes a limiting bolt; a through hole is horizontally formed on the surface of the U-shaped rod, and the length direction of the through hole is the same as the length direction of the support plate; the threaded section of the limiting bolt passes through the support plate and the through hole of the U-shaped rod and is screwed with the nut of the limiting bolt.

[0014] Furthermore, the limiting structure includes a limiting rod and a spring; a through hole is horizontally formed on the surface of the U-shaped rod, and the length direction of the through hole is the same as the length direction of the support plate; one end of the limiting rod is located in the sliding groove, the other end passes through the support plate and the through hole of the U-shaped rod and is located outside the U-shaped rod, and both ends of the limiting rod extend radially outward to form limiting ends; the spring is located in the sliding groove and between the limiting end of the limiting rod and the support plate.

[0015] Furthermore, the longitudinal telescopic member includes a support frame and a telescopic cylinder; the support frame is fixedly connected to the frame, the fixed end of the telescopic cylinder is fixedly connected to the support frame, and the movable end is fixedly connected to the support plate to drive the support plate to move longitudinally.

[0016] Furthermore, the longitudinal telescopic member includes a linear slide table module; the fixed end of the linear slide table module is fixedly connected to the frame, and the movable end is fixedly connected to the support plate to drive the support plate to move longitudinally.

[0017] Compared with the prior art, the beneficial effects of the present utility model include:

[0018] 1. The utility model can not only adjust the horizontal displacement of multiple extension rollers together through the guide roller assembly, but also adjust the distance between adjacent extension rollers, meeting the adjustment requirements of a single extension roller. Moreover, the adjustment of a single extension roller does not affect other extension rollers, improving the adjustment force and meeting more usage requirements.

[0019] 2. The utility model can limit the extension rollers adjusted in the horizontal direction through the limiting structure, so that their positions are relatively fixed to each other when not adjusted, facilitating the normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the protection scope of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0021] Figure 1 is a three-dimensional view of a stretching device for PTFE liquid filtration membranes introduced in the present utility model;

[0022] Figure 2 is based on Figure 1 the structural schematic diagram of the guide roller assembly;

[0023] Figure 3 is based on Figure 1 the structural schematic diagram of the extension roller;

[0024] Figure 4 is based on Figure 1 the side view;

[0025] Figure 5 is the structural schematic diagram of the pull rod introduced in Embodiment 2;

[0026] Figure 6 is the schematic diagram of the limiting structure introduced in Embodiment 3.

[0027] Explanation of the markings in the figures: 1. Frame; 2. Longitudinal telescopic member; 21. Support frame; 22. Telescopic cylinder; 3. Guide roller assembly; 31. Extension roller; 311. Roller; 312. Support block; 313. Slide block; 32. Support plate; 33. Pull rod; 331. L-shaped rod; 332. Connecting rod; 333. Longitudinal rod; 334. U-shaped rod; 34. Limiting structure; 341. Limiting bolt; 342. Limiting rod; 343. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0029] Embodiment 1

[0030] Please refer to Figure 1 , this embodiment introduces a stretching device for a PTFE liquid filtration membrane, which mainly consists of a frame 1, a longitudinal telescopic member 2 and a roller guide assembly 3.

[0031] The number of the longitudinal telescopic members 2 is two, one is installed at the top of the frame 1 and the other is installed at the bottom of the frame 1. The two longitudinal telescopic members 2 are symmetrically arranged, that is, the stretching directions of the two longitudinal telescopic members 2 are both longitudinally towards the middle of the frame 1. The longitudinal telescopic member 2 includes a support frame 21 and a telescopic cylinder 22; the support frame 21 is fixedly connected to the top or bottom of the frame 1, and can be installed and fixed by welding or bolt connection. If it is bolt connection, pre-holes need to be opened on the surfaces of the support frame 21 and the frame 1. The fixed end of the telescopic cylinder 22 is fixedly connected to the support frame 21, and the movable end is fixedly connected to the support plate 32 to drive the support plate 32 to move longitudinally. The telescopic directions of the telescopic cylinders 22 located at the top and bottom are opposite.

[0032] As Figure 2 shown, the roller guide assembly 3 mainly consists of an extension roller 31, a support plate 32, a pull rod 33 and a limit structure 34. The extension roller 31 includes a roller 311, a support block 312 and a slider 313. Both ends of the roller 311 are movably connected to the support block 312. For example, it can be connected by a bearing connection. A hole is opened on the support block 312 to connect with the outer wall of the bearing, and the inner wall of the bearing is connected to the end of the extension roller 31 to achieve the movable connection between the roller 311 and the support block 312. Other methods can also be used. It should be emphasized that if different rotation speeds are required between the rollers 311, a motor can be arranged outside the support block 312 to directly drive the roller 311 to change the rotation speed, or a special driving member can be arranged to change the rotation speed of the roller 311 by meshing gears with different diameters. Other existing structures for changing the rotation speed of the extension roller 31 can also be used and set accordingly according to the actual drawing needs.

[0033] As Figure 3As shown in the figure, a slider 313 in a "T" shape is fixedly connected to the top of the support block 312. The number of the extension rollers 31 is more than one, at least three are arranged horizontally at the same height and form a group. A longitudinal telescopic member 2 is correspondingly connected to a group of extension rollers 31, and two groups of extension rollers 31 are arranged staggeredly to facilitate guiding the PTFE. Since both ends of each group of linearly distributed roller barrels 311 are on the same line, the sliders 313 at the top are also on the same line. A "T"-shaped chute is formed at the bottom of the support plate 32 close to the sliders 313. Multiple sliders 313 are located in the same chute and can slide in the chute. Since the chute is adapted to the sliders 313, the sliders 313 located in the chute also play a certain role in supporting the roller barrels 311, and the sliders 313 can only be detached from both ends of the chute.

[0034] In order to pull the extension rollers 31 to move horizontally on the support plate 32, each extension roller 31 is correspondingly connected to a pull rod 33. Multiple pull rods 33 are longitudinally arranged in a stepped manner without interfering with each other. Multiple pull rods 33 can be pulled simultaneously to realize the horizontal linear movement of multiple extension rollers 31, or only one pull rod 33 can be pulled to realize the horizontal linear movement of one of the extension rollers 31.

[0035] As Figure 2 shown in the figure, the pull rod 33 is composed of an L-shaped rod 331 and a connecting rod 332. The L-shaped rod 331 is located outside the support plate 32. One end of the side part is fixedly connected to the outside of the support block 312, and the length direction of the other end is parallel to the sliding direction of the slider 313, and the end extends to the outside of the support plate 32. The ends of the two L-shaped rods 331 are connected by the connecting rod 332. The connecting rod 332 can drive the L-shaped rod 331, thereby driving the extension roller 31 to move.

[0036] After the position of the extension roller 31 is adjusted, in order to fix the relative position relationship between the extension roller 31 and the support plate 32, a limiting structure 34 is arranged on the support plate 32, and the limiting structure 34 adopts a limiting bolt 341. An opening is horizontally formed on the surface of the L-shaped rod 331, and the length direction of the opening is the same as the length direction of the support plate 32. The head of the limiting bolt 341 is located in the chute of the support plate 32, and the tail, that is, the threaded section, passes through the support plate 32 and the opening of the L-shaped rod 331, and the end is located outside the L-shaped rod 331 and is screwed with a nut. By tightening the nut, the L-shaped rod 331 can be limited, so that the extension roller 31 cannot slide. The number of the limiting bolts 341 is at least one. To facilitate the limiting bolt 341 to pass through the support plate 32, a hole is formed on the side of the support plate 32, which can enable the end of the limiting bolt 341 to horizontally penetrate the support plate 32 from the chute. When the extension roller 31 needs to be adjusted, the nut of the limiting bolt 341 can be loosened. The length of the opening of the L-shaped rod 331 can meet the displacement requirement of the horizontal movement of the extension roller 31.

[0037] In this embodiment, the guide roller assembly 3 can not only adjust the horizontal displacement of multiple extension rollers together, but also adjust the distance between adjacent extension rollers, meeting the adjustment requirements of a single extension roller. Moreover, the adjustment of a single extension roller does not affect other extension rollers, improving the adjustment force and meeting more usage requirements.

[0038] Embodiment 2

[0039] As Figure 5 shown, this embodiment introduces a stretching device for PTFE liquid filtration membranes, which has basically the same structure as the stretching device for PTFE liquid filtration membranes introduced in Embodiment 1. The difference is that the pull rod 33 in this embodiment adopts a longitudinal rod 333 and a U-shaped rod 334; the longitudinal rod 333 is fixedly connected to the outer side of the support block 312, and both ends of the U-shaped rod 334 are respectively connected to the longitudinal rod 333 on the same extension roller 31. The bending parts of multiple U-shaped rods 334 are located around the support plate 32 and are longitudinally distributed. The longitudinal rod 333 is driven by the U-shaped rod 334, thereby driving the extension roller 31 to move horizontally. It should be noted that the opening is provided on the U-shaped rod 334 at a position parallel to the length direction of the support plate 32 to cooperate with the limit of the limit bolt 341.

[0040] This embodiment has the same beneficial effects as Embodiment 1.

[0041] Embodiment 3

[0042] As Figure 6 shown, this embodiment introduces a stretching device for PTFE liquid filtration membranes, which has basically the same structure as the stretching device for PTFE liquid filtration membranes introduced in Embodiment 1. The difference is that the limit structure 34 in this embodiment adopts a limit rod 342 and a spring 343; similar to Embodiment 1, the surface of the pull rod 33 has an opening through which the limit rod 342 can pass. One end of the limit rod 342 is located in the chute, and the other end passes through the support plate 32 and the opening of the pull rod 33 and is located outside the pull rod 33. Both ends of the limit rod 342 extend radially outward to form limit ends; the spring 343 is located in the chute and between the limit end of the limit rod 342 and the support plate 32.

[0043] It should be noted that the limit ends of the limit rod 342 are preferably detachable, that is, round blocks with a diameter larger than the limit rod 342 are clamped or screwed at both ends of the limit rod 342 as the limit ends, so as to prevent the limit rod 342 from detaching from the support plate 32 and the pull rod 33. At the same time, to improve the limit on the pull rod 33, longitudinally arranged tooth patterns that mesh with each other can also be provided on the inner side of the limit end and the outer side of the pull rod 33. When the spring 343 pushes the limit rod 342 into the chute, the limit end located outside the pull rod 33 closely adheres to the pull rod 33, and under the further limit of the tooth patterns, the pull rod 33 is not easy to move outside the support plate 32.

[0044] This embodiment has the same beneficial effects as Embodiment 1.

[0045] Embodiment 4

[0046] This embodiment introduces a stretching device for a PTFE liquid filtration membrane, which has basically the same structure as the stretching device for a PTFE liquid filtration membrane introduced in Embodiment 1. The difference is that the longitudinal telescopic member 2 in this embodiment adopts a linear slide table module (not shown in the figure). The fixed end of the linear slide table module is fixedly connected to the frame 1, and the movable end is fixedly connected to the support plate 32 to drive the support plate 32 to move longitudinally.

[0047] This embodiment has the same beneficial effects as Embodiment 1.

[0048] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A stretching device for a PTFE liquid filtration membrane, characterized in that: It includes: Framework (1); Two longitudinal telescopic members (2) are arranged symmetrically in the longitudinal direction, the fixed ends of the two longitudinal telescopic members (2) are respectively fixedly connected to the top of the frame (1) and the bottom of the frame (1), and the movable ends of the two longitudinal telescopic members (2) are arranged facing each other; A guide roller assembly (3), comprising an extension roller (31), a support plate (32), a pull rod (33) and a limiting structure (34); two support plates (32) are correspondingly mounted on the movable ends of the longitudinal telescopic member (2); at least three extension rollers (31) form a group, and two groups of extension rollers (31) are slidingly arranged one by one on the side of the two support plates (32) away from the longitudinal telescopic member (2), and each group of extension rollers (31) is horizontally linearly arranged; the number of pull rods (33) is consistent with the number of extension rollers (31), and one pull rod (33) is correspondingly arranged at both ends of an extension roller (31) for driving the extension roller (31) to slide; the pull rod (33) at the end of each group of extension rollers (31) is located on the outside of the support plate (32) and is distributed in a stepped manner, and a limiting structure (34) is arranged between the pull rod (33) and the side of the support plate (32) for limiting the relative displacement between the pull rod (33) and the support plate (32).

2. The stretching device for PTFE liquid filtration membrane according to claim 1, characterized in that: The extension roller (31) comprises a roller (311), a support block (312) and a slider (313); both ends of the roller (311) are movably connected to the support block (312); the top end of the support block (312) is fixedly connected to the slider (313); the slider (313) is in a "T" shape; a slide groove matching the slider (313) is formed on the surface of the support plate (32) along its length direction; the slider (313) is located in the slide groove.

3. The stretching device for PTFE liquid filtration membrane according to claim 2, characterized in that: The pull rod (33) comprises an L-shaped rod (331) and a connecting rod (332); one end of the L-shaped rod (331) is fixedly connected to the outer side of the support block (312), and the other end of the L-shaped rod (331) extends horizontally outward along the length direction of the support plate (32); the end of the L-shaped rod (331) at the same horizontal height is fixedly connected to the connecting rod (332), and a plurality of connecting rods (332) are located on the periphery of the support plate (32) and distributed longitudinally.

4. The stretching device for PTFE liquid filtration membrane according to claim 3, characterized in that: The limiting structure (34) comprises a limiting bolt (341); a hole is horizontally opened on the surface of the L-shaped rod (331), and the length direction of the hole is the same as the length direction of the support plate (32); the threaded section of the limiting bolt (341) crosses the support plate (32) and the hole of the L-shaped rod (331) and is threadedly connected to the nut of the limiting bolt (341).

5. The stretching device for PTFE liquid filtration membrane according to claim 3, characterized in that: The limiting structure (34) comprises a limiting rod (342) and a spring (343); a hole is horizontally opened on the surface of the L-shaped rod (331), and the length direction of the hole is the same as the length direction of the support plate (32); one end of the limiting rod (342) is located in the sliding groove, and the other end crosses the support plate (32) and the hole of the L-shaped rod (331) and is located outside the L-shaped rod (331), and the two ends of the limiting rod (342) extend radially outward to form a limiting end; the spring (343) is located in the sliding groove and between the limiting end of the limiting rod (342) and the support plate (32).

6. The stretching device for PTFE liquid filtration membrane according to claim 2, characterized in that: The pull rod (33) comprises a longitudinal rod (333) and a U-shaped rod (334); the longitudinal rod (333) is fixedly connected to the outer side of the support block (312), and the two ends of the U-shaped rod (334) are respectively connected to the longitudinal rod (333) on the same extension roller (31), and the bending parts of the multiple U-shaped rods (334) are located on the periphery of the support plate (32) and are distributed longitudinally.

7. The stretching device for PTFE liquid filtration membrane according to claim 6, characterized in that: The limiting structure (34) comprises a limiting bolt (341); a hole is horizontally opened on the surface of the U-shaped rod (334), and the length direction of the hole is the same as the length direction of the support plate (32); the threaded section of the limiting bolt (341) crosses the support plate (32) and the hole of the U-shaped rod (334) and is threadedly connected to the nut of the limiting bolt (341).

8. The stretching device for PTFE liquid filtration membrane according to claim 6, characterized in that: The limiting structure (34) comprises a limiting rod (342) and a spring (343); a hole is horizontally opened on the surface of the U-shaped rod (334), and the length direction of the hole is the same as the length direction of the support plate (32); one end of the limiting rod (342) is located in the sliding groove, and the other end crosses the support plate (32) and the hole of the U-shaped rod (334) and is located outside the U-shaped rod (334), and the two ends of the limiting rod (342) extend radially outward to form a limiting end; the spring (343) is located in the sliding groove and between the limiting end of the limiting rod (342) and the support plate (32).

9. The stretching device for PTFE liquid filtration membrane according to claim 1, characterized in that: The longitudinal telescopic member (2) comprises a support frame (21) and a telescopic cylinder (22); the support frame (21) is fixedly connected to the frame (1); the fixed end of the telescopic cylinder (22) is fixedly connected to the support frame (21), and the movable end is fixedly connected to the support plate (32), so as to drive the support plate (32) to move longitudinally.

10. The stretching device for PTFE liquid filtration membrane according to claim 1, characterized in that: The longitudinal telescopic member (2) comprises a linear slide module; the fixed end of the linear slide module is fixedly connected to the frame (1), and the movable end is fixedly connected to the support plate (32), so as to drive the support plate (32) to move longitudinally.

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