Flat sheet membrane core fastening device

Abstract

The utility model relates to a flat membrane core fastening device which comprises a central pull rod, flat membrane core fastening devices are arranged at the two ends of the central pull rod, and a flow guide plate is clamped between the two flat membrane core fastening devices through an end plate; the flat sheet membrane core fastening device is composed of a first center pull rod clamping assembly, a second center pull rod clamping assembly and a clamping assembly fixing piece, the first center pull rod clamping assembly and the second center pull rod clamping assembly are both sector plates bent in a curvature mode, and the two sector plates are spliced into a complete circular ring. The utility model relates to the technical field of water treatment. According to the flat membrane core fastening device, through the arrangement of the flat membrane core fastening device, the situation that the flat membrane core fastening device is loosened due to vibration generated when a flat membrane core is used can be avoided, so that the situation that the fastening state of the flat membrane core is gradually deteriorated in the using process can be avoided; the quality of the flat membrane core can be effectively improved, and the practicability of the flat membrane core is improved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a flat sheet membrane core fastening device. Background Technology

[0002] The flat sheet membrane core fastening device is used to ensure that the flat sheet membrane core maintains a stable axial compression state during filtration. It is of great significance for ensuring sealing effect, improving filtration efficiency, and extending membrane core life.

[0003] Currently, membrane cores are mostly secured with nuts, which pre-tightens the membrane core by controlling the tightening torque of the nut. However, the effectiveness of nut tightening is easily affected by environmental factors such as temperature, humidity, and lubrication conditions. Changes in these factors can affect the coefficient of friction and the stability of the pre-tightening force. Furthermore, after the flat sheet membrane module has been running for a period of time, a decrease in torque may occur, requiring manual torque pre-tightening by workers, which is inefficient and costly.

[0004] Therefore, developing a membrane core fastening device that requires no subsequent axial force pre-tightening, has a simple structure, is easy to install and disassemble, and is low in cost has significant practical value and market prospects. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flat membrane core fastening device to solve the technical problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A flat membrane core fastening device includes a central tie rod with flat membrane core fastening devices at both ends, and a guide plate is held between the two flat membrane core fastening devices by an end plate clamping the guide plate.

[0008] The flat membrane core fastening device consists of a first central tie rod clamping assembly, a second central tie rod clamping assembly, and a clamping assembly fixing component. The first and second central tie rod clamping assemblies are both curved fan-shaped plates, which are joined together to form a complete ring. The inner diameter of the ring is the same as the outer diameter of the central tie rod. The connection between the first and second central tie rod clamping assemblies is achieved through the clamping assembly fixing component.

[0009] Furthermore, the inner sidewalls of the first and second central tie rod clamping assemblies are provided with a plurality of positioning bosses formed by protrusions at equal intervals along the axial direction, and the outer sidewall of the end of the central tie rod is provided with a groove for inserting the positioning bosses.

[0010] Furthermore, the clamping assembly includes a fixing post and a buckle. The outer walls of the first central tie rod clamping assembly and the second central tie rod clamping assembly are symmetrically provided with two sets of fixing grooves, and a fixing post is fixedly connected in the fixing groove.

[0011] When the first central tie rod clamping assembly and the second central tie rod clamping assembly are spliced ​​together, the two adjacent fixed posts are engaged by a snap-fit ​​mechanism.

[0012] Furthermore, the end plate includes an inner ring, an outer ring, and reinforcing ribs. The inner ring is sleeved on the central tie rod, and an outer ring is provided on the outer side of the inner ring. Multiple reinforcing ribs are provided between the inner sidewall of the outer ring and the outer sidewall of the inner ring.

[0013] Furthermore, the shape of the guide vane can be either curved or polygonal.

[0014] Furthermore, the outer surface of the outer ring is either curved or polygonal, so that the shape of the outer ring is the same as the shape of the guide plate.

[0015] In summary, this utility model has at least one of the following beneficial technical effects:

[0016] 1. The flat sheet membrane core fastening device can prevent the flat sheet membrane core from loosening due to vibration during use, thereby preventing the membrane core fastening state from gradually deteriorating during use, effectively improving the quality and practicality of the flat sheet membrane core.

[0017] 2. This flat sheet membrane core fastening device allows the shape of the guide plate and outer ring to be either curved or polygonal, thus enabling the shape of the flat sheet membrane core to be changed according to the structure of the flat sheet membrane core, thereby expanding the application range of the flat sheet membrane core. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a flat membrane core fastening device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the flat membrane core fastening device in the present invention.

[0021] Figure 3 This is a schematic diagram of the first central tie rod clamping assembly in a flat membrane core fastening device of this utility model.

[0022] Figure 4 This is a schematic diagram of the end structure of the central tie rod in a flat membrane core fastening device of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the end plate of a flat membrane core fastening device according to the present invention.

[0024] In the figure, 1. Central tie rod; 2. Flat membrane core fastening device; 21. First central tie rod clamping assembly; 22. Second central tie rod clamping assembly; 23. Clamping assembly fixing part; 231. Fixing post; 232. Buckle; 3. End plate; 31. Inner ring; 32. Outer ring; 33. Reinforcing rib; 4. Guide plate; 5. Positioning boss; 6. Groove; 7. Fixing groove. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0026] Reference Figure 1 - Figure 5 The present invention discloses a flat membrane core fastening device, including a central tie rod 1, both ends of which are provided with flat membrane core fastening devices 2, and the two flat membrane core fastening devices 2 are connected by an end plate 3 to hold a guide plate 4.

[0027] The flat membrane core fastening device 2 consists of a first central tie rod clamping assembly 21, a second central tie rod clamping assembly 22, and a clamping assembly fixing member 23. The first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are both curved fan-shaped plates. The two fan-shaped plates are joined together to form a complete ring. The inner diameter of the ring is the same as the outer diameter of the central tie rod 1. The connection between the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 is connected by the clamping assembly fixing member 23.

[0028] In this embodiment, the current method of fixing the membrane core by applying torque pre-tightening to the nut has the problem of unstable fixing. Due to the influence of various factors such as the friction coefficient between the nut and bolt, material properties, and the operating environment during assembly, it is difficult to ensure that the pre-tightening torque reaches the preset precise value every time. This makes the membrane core prone to loosening when subjected to external forces such as vibration and impact, thus affecting the stability of the entire equipment. Secondly, even if the initial pre-tightening torque reaches the standard value, over time and during equipment operation, small gaps will appear between the nut and bolt due to friction wear, temperature changes, and other factors. The accumulation of these gaps will gradually reduce the pre-tightening force, causing the membrane core's tightness to gradually deteriorate, eventually leading to loosening. This loosening not only affects the performance of the membrane core but may also damage the entire equipment.

[0029] Therefore, observation Figure 1 It can be observed that a guide plate 4 is sleeved on the outer wall of the central tie rod 1, and the two sides of the guide plate 4 are in contact with the flat membrane core fastening device 2 set at both ends of the central tie rod 1 through the end plate 3. Then, observation... Figure 2 It can be observed that when the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are spliced ​​together, the central tie rod 1 is clamped. The static friction force generated when the inner sidewalls of the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 contact the outer wall of the central tie rod 1 is used to counteract the lateral force generated when the membrane core vibrates. This ensures that the tightness of the flat sheet membrane core does not deteriorate, thereby improving the performance of the flat sheet membrane core.

[0030] Because the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are separate units, the longitudinal force generated during membrane core vibration causes the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 to tend to move away from the central tie rod 1, affecting the fastening effect of the flat sheet membrane core. Therefore, observation is needed. Figure 2 It can also be found that a clamping component fixing part 23 is provided at the junction of the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22. The clamping component fixing part 23 can be used to ensure the installation firmness between the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22, which can further improve the fastening effect of the flat sheet membrane core, thereby further improving the quality of the flat sheet membrane core.

[0031] In a further preferred embodiment of this utility model, such as Figure 2 - Figure 4 As shown, the inner sidewalls of the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are provided with a plurality of positioning bosses 5 formed by protrusions at equal intervals along the axial direction, and the outer sidewall of the end of the central tie rod 1 is provided with a groove 6 for inserting the positioning bosses 5.

[0032] In this embodiment, since the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are in contact with the central tie rod 1 through the inner sidewall, when the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are subjected to the lateral force of vibration, they will pull the surface of the central tie rod 1, causing the local stress of the central tie rod 1 to be too concentrated and resulting in damage.

[0033] Therefore, observe Figure 2 and Figure 3 It can be observed that both the inner walls of the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are provided with protruding positioning bosses 5. Further observation... Figure 4 It can be observed that a groove 6 for inserting the positioning boss 5 is provided on the outer side wall of the end of the central tie rod 1. When the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are spliced ​​and fitted onto the central tie rod 1, the positioning boss 5 is inserted into the groove 6, increasing the contact area between the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 and the central tie rod 1, thereby reducing stress concentration and improving the seismic strength of the flat membrane core. At the same time, the setting of the positioning boss 5 and the groove 6 also makes it easier for the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 to be assembled with the central tie rod 1.

[0034] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the clamping assembly fixing member 23 includes a fixing post 231 and a buckle 232. The outer side walls of the first central pull rod clamping assembly 21 and the second central pull rod clamping assembly 22 are symmetrically provided with two sets of fixing grooves 7, and the fixing post 231 is fixedly connected in the fixing groove 7.

[0035] When the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are spliced ​​together, the two adjacent fixing posts 231 are engaged by buckles 232.

[0036] In this embodiment, by providing fixing grooves 7 on the outer walls of the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22, and by providing fixing posts 231 in the fixing grooves 7, when the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 are spliced ​​together, the two adjacent fixing posts 231 are secured by buckles 232, thereby fixing the first central tie rod clamping assembly 21 and the second central tie rod clamping assembly 22 together. This makes the installation of the flat sheet membrane core fastening device 2 more convenient and reduces the difficulty of using the flat sheet membrane core fastening device 2.

[0037] In a further preferred embodiment of this utility model, such as Figure 5As shown, the end plate 3 includes an inner ring 31, an outer ring 32, and reinforcing ribs 33. The inner ring 31 is sleeved on the central tie rod 1. An outer ring 32 is provided on the outer side of the inner ring 31. Multiple reinforcing ribs 33 are provided between the inner sidewall of the outer ring 32 and the outer sidewall of the inner ring 31.

[0038] In this embodiment, the end plate 3 can be used to fix the guide plate 4, thereby making the installation of the flat sheet membrane more stable. The end plate 3 is composed of an inner ring 31, an outer ring 32 and a reinforcing rib 33, which can reduce the weight of the end plate 3, thereby reducing the overall weight of the flat sheet membrane core and making the installation of the flat sheet membrane core easier.

[0039] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the shape of the guide plate 4 is either curved or polygonal.

[0040] In this embodiment, since the structure of the flat sheet membrane core is different, the specific shape of the flat sheet membrane core is also different. Therefore, the shape of the guide plate 4 is either curved or polygonal, so that the shape of the flat sheet membrane core can be changed according to the structure of the flat sheet membrane core, making the application range of the flat sheet membrane core wider.

[0041] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the outer surface of the outer ring 32 is either curved or polygonal, so that the shape of the outer ring 32 is the same as the shape of the guide plate 4.

[0042] In this embodiment, since the end plate 3 serves to clamp the guide plate 4, and the shape of the guide plate 4 needs to be changed according to the specific use structure of the flat membrane core, the support point of the end plate 3 on the guide plate 4 will change, thereby affecting the clamping effect of the end plate 3 on the guide plate 4. Therefore, the outer surface of the outer ring 32 of the end plate 3 is made into one of a curve or a polygon, so that the shape of the outer ring 32 can be the same as the shape of the guide plate 4, so that the end plate 3 can better support the guide plate 4.

[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A flat sheet membrane cartridge fastening device, characterized by, It includes a central tie rod (1), both ends of which are provided with flat membrane core fastening devices (2), and the two flat membrane core fastening devices (2) are connected by an end plate (3) to hold the guide plate (4). The flat membrane core fastening device (2) consists of a first central tie rod clamping assembly (21), a second central tie rod clamping assembly (22), and a clamping assembly fixing part (23). The first central tie rod clamping assembly (21) and the second central tie rod clamping assembly (22) are both curved fan-shaped plates. The two fan-shaped plates are joined together to form a complete ring. The inner diameter of the ring is the same as the outer diameter of the central tie rod (1). The connection between the first central tie rod clamping assembly (21) and the second central tie rod clamping assembly (22) is connected by the clamping assembly fixing part (23).

2. A flat sheet membrane cartridge fastening device according to claim 1, wherein, The inner sidewalls of the first central tie rod clamping assembly (21) and the second central tie rod clamping assembly (22) are provided with a plurality of protrusions forming positioning bosses (5) at equal intervals along the axial direction, and the outer sidewall of the end of the central tie rod (1) is provided with a groove (6) for inserting the positioning bosses (5).

3. A flat sheet membrane cartridge fastening device according to claim 2, wherein, The clamping assembly fixing component (23) includes a fixing post (231) and a buckle (232). The outer side walls of the first central tie rod clamping assembly (21) and the second central tie rod clamping assembly (22) are symmetrically provided with two sets of fixing grooves (7), and the fixing post (231) is fixedly connected in the fixing groove (7). When the first central tie rod clamping assembly (21) and the second central tie rod clamping assembly (22) are spliced ​​together, the two adjacent fixed posts (231) are engaged by a buckle (232).

4. A flat sheet membrane cartridge fastening device according to claim 3, wherein, The end plate (3) includes an inner ring (31), an outer ring (32) and reinforcing ribs (33). The inner ring (31) is sleeved on the central tie rod (1). An outer ring (32) is provided on the outer side of the inner ring (31). Multiple reinforcing ribs (33) are provided between the inner sidewall of the outer ring (32) and the outer sidewall of the inner ring (31).

5. A flat sheet membrane cartridge fastening device according to claim 4, wherein, The shape of the guide plate (4) is either curved or polygonal.

6. A flat sheet membrane cartridge fastening device according to claim 5, wherein, The outer surface of the outer ring (32) is either curved or polygonal, so that the shape of the outer ring (32) is the same as the shape of the guide plate (4).

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