Flexible diaphragm

Abstract

The utility model provides a flexible diaphragm which comprises a diaphragm body, the diaphragm body comprises a front diaphragm and a rear diaphragm which are symmetrically arranged, the peripheries of the front diaphragm and the rear diaphragm are connected in a sealed mode to form a closed bag body structure, and a water production inner cavity is formed inside the bag body structure. A first water production hole and a second water production hole are respectively formed in two opposite angles of the diaphragm body, penetrate through the front diaphragm and the rear diaphragm and are communicated with the water production inner cavity. According to the flexible diaphragm provided by the utility model, the water production holes are respectively formed in the two opposite angles of the diaphragm, so that the cleaning effect and efficiency of chemical backwashing are improved while the water collection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of membrane bioreactors, and particularly relates to a flexible diaphragm. Background Art

[0002] The submerged membrane bioreactor (MBR) is an organic combination of membrane separation technology and biotechnology. It uses ultrafiltration or microfiltration membrane separation technology to replace the secondary sedimentation tank and conventional filtration unit of the traditional activated sludge method, so that the hydraulic retention time (HRT) and sludge age (STR) are completely separated. This is an efficient and economical sewage resource technology with efficient solid-liquid separation capabilities. Not only is the effluent water quality good, the suspended solids and turbidity are close to zero, but it can also intercept biological pollutants such as Escherichia coli. And because the effluent water quality is significantly better than the traditional sewage treatment process, the treated water can be directly reused, and it has a wide range of application prospects.

[0003] Existing flexible diaphragm structures such as Figure 1 As shown, a through water-producing hole 21 is provided in the middle of the diaphragm 20, and the produced water is discharged through the water-producing hole 21. A fixing hole 22 is provided at the top of the diaphragm 20, and the flexible diaphragm 20 is fixed by a fixing rod passing through the fixing hole 22. After the diaphragm 20 has been used for a period of time, impurities in the sewage will adhere to the diaphragm 20, and it is necessary to introduce a reagent into the diaphragm 20 for backwashing. During backwashing, the reagent is introduced through the water-producing hole 21, and then extracted from the water-producing hole 22 after cleaning. During cleaning, only the reagent is introduced, and the fluidity of the reagent in the diaphragm 20 is poor, and the cleaning effect is limited. When the reagent is introduced, the diaphragm 20 will bulge, and the diaphragm 20 may be damaged when the pressure is high. During the cleaning process, the introduction and extraction of the reagent cannot be carried out at the same time, which affects the cleaning efficiency. In addition, only the fixing hole 22 is provided at the top of the diaphragm 20, and the stability of the fixation is insufficient.

[0004] Therefore, it is necessary to provide a flexible membrane to solve or at least partially solve the above problems. Utility Model Content

[0005] The utility model provides a flexible diaphragm, wherein water production holes are respectively arranged at two diagonal corners of the diaphragm, so as to improve the water collection efficiency and the cleaning effect and efficiency of the chemical backwashing at the same time.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flexible diaphragm comprises a diaphragm body, wherein the diaphragm body comprises a front diaphragm and a rear diaphragm which are symmetrically arranged, wherein the front diaphragm and the rear diaphragm are sealed and connected on all sides to form a closed bag structure and a water-producing inner cavity is formed inside, wherein a first water-producing hole and a second water-producing hole are respectively arranged at two diagonal portions of the diaphragm body, wherein the first water-producing hole and the second water-producing hole both penetrate the front diaphragm and the rear diaphragm and are connected to the water-producing inner cavity.

[0008] Optionally, the first water-producing hole is arranged at a corner below the diaphragm body, and the second water-producing hole is arranged at a corner above and diagonally opposite to the corner where the first water-producing hole is located.

[0009] Optionally, the front membrane sheet and the rear membrane sheet each include an inner PET guide mesh layer and an outer PVDF membrane paper, and the PET guide mesh layer guides the produced water to the first water production hole and the second water production hole.

[0010] Optionally, an annular closed sealing connection line is provided around the front diaphragm and the rear diaphragm, and the front diaphragm and the rear diaphragm are sealed and connected by welding along the sealing connection line.

[0011] Optionally, a plurality of fixing holes are provided on both sides of the diaphragm body, and the plurality of fixing holes are provided outside the sealed connecting line, so that the fixing holes are not connected to the water production cavity.

[0012] Optionally, a plurality of the fixing holes are arranged at intervals.

[0013] Optionally, the welding along the sealing connection line is continuous eddy current welding.

[0014] Compared with the prior art, the technical solution of the utility model has beneficial effects.

[0015] For example, the flexible diaphragm provided by the utility model is respectively provided with a first water production hole and a second water production hole at two diagonal points of the diaphragm body; when water is produced, the produced water is collected through the two water production holes to improve the water collection efficiency; the first water production hole is arranged at the bottom, and the second water production hole is arranged at the top, and when the agent is backwashed, the agent is introduced into the first water production hole and the agent is extracted from the second water production hole, and the agent continues to flow in the water production cavity, has good fluidity, a large cleaning area, and a good cleaning effect; the agent enters and exits at the same time, the diaphragm body will not be bulged and damaged, and the cleaning efficiency is improved.

[0016] For another example, the flexible diaphragm provided by the present invention has a plurality of fixing holes disposed on both sides of the diaphragm body to improve the fixing stability of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the structure of an existing flexible diaphragm;

[0018] Figure 2 This is a schematic diagram of the flexible diaphragm structure in an embodiment of the utility model;

[0019] Figure 3 It is a side view of the flexible diaphragm in the embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 10. Diaphragm body; 11. Front diaphragm; 12. Rear diaphragm; 13. First water-producing hole; 14. Second water-producing hole; 15. Sealing connection line; 16. Fixing hole;

[0022] 20. Diaphragm; 21. Water production hole; 22. Fixing hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0024] Figure 2 It is a schematic diagram of the structure of the flexible diaphragm in the embodiment of the utility model; Figure 3 It is a side view of the flexible diaphragm in the embodiment of the utility model.

[0025] Reference Figure 2-Figure 3 , an embodiment of the utility model provides a flexible diaphragm.

[0026] Specifically, the flexible diaphragm includes a diaphragm body 10, which includes a front diaphragm 11 and a rear diaphragm 12 which are symmetrically arranged. The front diaphragm 11 and the rear diaphragm 12 are sealed and connected on all sides to form a closed bag structure and form a water-producing inner cavity inside. A first water-producing hole 13 and a second water-producing hole 14 are respectively arranged at two diagonal points of the diaphragm body 10. The first water-producing hole 13 and the second water-producing hole 14 both penetrate the front diaphragm 11 and the rear diaphragm 12 and are connected to the water-producing inner cavity.

[0027] In some embodiments, the first water-producing hole 13 is disposed at a corner below the membrane body 10 , and the second water-producing hole 14 is disposed at a corner above the corner diagonally opposite to the corner where the first water-producing hole 13 is located;

[0028] In a specific implementation, a first water collecting pipe is arranged through the first water producing hole 13, and a second water collecting pipe is arranged through the second water producing hole 14. Both the first water collecting pipe and the second water collecting pipe are provided with water collecting holes, and both the first water collecting pipe and the second water collecting pipe are connected to the water producing cavity through the water collecting holes. When producing water, the first water collecting pipe and the second water collecting pipe collect the produced water through the first water producing hole 13 and the second water producing hole 14 respectively, so as to improve the water collecting efficiency. When the agent is backwashed, the agent is introduced into the first water producing hole 13 through the first water collecting pipe, and the agent is extracted from the second water producing hole 14 through the second water collecting pipe. The agent flows continuously in the water producing cavity, has good fluidity, a large cleaning area and a good cleaning effect. The agent enters and exits at the same time, and the diaphragm body 10 will not be bulged and damaged. Compared with the prior art, the time for extracting the agent is reduced and the cleaning efficiency is improved.

[0029] In some embodiments, the front membrane 11 and the rear membrane 12 both include an inner PET guide mesh layer and an outer PVDF membrane paper, and the PET guide mesh layer guides the produced water to the first water production hole 13 and the second water production hole 14 .

[0030] In some embodiments, an annular closed sealing connection line 15 is disposed around the front diaphragm 11 and the rear diaphragm 12 , and the front diaphragm 11 and the rear diaphragm 12 are sealed and connected by welding along the sealing connection line 15 .

[0031] In some embodiments, a plurality of fixing holes 16 are disposed on both sides of the diaphragm body 10 , and the plurality of fixing holes 16 are disposed outside the sealed connection line 15 , so that the fixing holes 16 are not connected to the water production cavity.

[0032] In some embodiments, a plurality of fixing holes 16 are arranged at intervals to ensure reliable fixation.

[0033] In some embodiments, the welding along the sealing connection line 15 is continuous eddy current welding, which is reliable and has good sealing performance.

[0034] To sum up, the flexible diaphragm provided by the utility model is respectively provided with a first water production hole 13 and a second water production hole 14 at two diagonal positions of the diaphragm body 10; when water is produced, the produced water is collected through the two water production holes to improve the water collection efficiency; the first water production hole 13 is arranged at the bottom, and the second water production hole 14 is arranged at the top. When the agent is backwashed, the agent is introduced into the first water production hole 13 and the agent is extracted from the second water production hole 14. The agent continues to flow in the water production cavity, has good fluidity, a large cleaning area, and a good cleaning effect; the agent enters and exits at the same time, the diaphragm body 10 will not be bulged and damaged, and the cleaning efficiency is improved.

[0035] Furthermore, the flexible diaphragm provided by the present invention is provided with a plurality of fixing holes 16 on both sides of the diaphragm body 10 to improve the fixing stability of the diaphragm.

[0036] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

[0037] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A flexible membrane, characterized in that: It includes a diaphragm body, which includes a front diaphragm and a rear diaphragm that are symmetrically arranged. The front diaphragm and the rear diaphragm are sealed and connected on all sides to form a closed bag structure and a water-producing inner cavity is formed inside. A first water-producing hole and a second water-producing hole are respectively arranged at two diagonal points of the diaphragm body. The first water-producing hole and the second water-producing hole both penetrate the front diaphragm and the rear diaphragm and are connected to the water-producing inner cavity.

2. The flexible membrane according to claim 1, characterized in that: The first water-producing hole is arranged at a corner below the membrane body, and the second water-producing hole is arranged at a corner above the corner diagonally opposite to the corner where the first water-producing hole is located.

3. The flexible membrane according to claim 1, characterized in that: The front membrane sheet and the rear membrane sheet both include an inner PET guide mesh layer and an outer PVDF membrane paper, and the PET guide mesh layer guides the produced water to the first water production hole and the second water production hole.

4. The flexible membrane according to claim 1, characterized in that: The front diaphragm and the rear diaphragm are both provided with annular closed sealing connection lines around their peripheries, and the front diaphragm and the rear diaphragm are sealed and connected by welding along the sealing connection lines.

5. The flexible membrane according to claim 4, characterized in that: A plurality of fixing holes are arranged on both sides of the diaphragm body, and the plurality of fixing holes are arranged outside the sealed connecting line, so that the fixing holes are not connected with the water production cavity.

6. The flexible membrane according to claim 5, characterized in that: The plurality of fixing holes are arranged at intervals.

7. The flexible membrane according to claim 4, characterized in that: The welding along the sealing connection line is continuous eddy current welding.

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