Backwashing sand leakage prevention device for sand filter material filter tank
By installing a temperature detection mechanism and stirring blades inside the sand filter bed, the backwashing intensity is automatically adjusted, which solves the problem of sand leakage in V-type filters under different temperature conditions, improves the filtration and backwashing effect of the filter bed, and reduces filter media loss and economic investment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI JIANGBEI HUAYAN WATER CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-21
AI Technical Summary
Existing V-type filters are prone to sand leakage under different temperature conditions, resulting in unsatisfactory filtration performance and poor backwashing effect, which increases the cost of filter media replenishment.
A temperature detection mechanism is installed in the sand filter tank. The temperature sensing element detects the water temperature and automatically adjusts the backwash intensity. Combined with the stirring blades to agitate the water, this ensures that the temperature sensing element can detect the temperature comprehensively and prevents sand from escaping.
It enables automatic adjustment of backwashing intensity based on temperature changes, preventing sand runoff, improving the filtration effect and backwashing efficiency of the filter bed, and reducing filter media loss and replenishment costs.
Smart Images
Figure CN224141547U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the technical field of sand filter beds, specifically to a backwashing device for preventing sand runoff in sand filter beds. Background Technology
[0002] V-type filters are rapid filters named for their V-shaped inlet tank. Their main characteristics are uniform water distribution and excellent backwashing effect. V-type filters are also called uniform particle size filters because the particle size distribution of the filter media is basically uniform in the reverse direction of the depth. The filter media layer does not easily expand during the entire backwashing process, hence the name. Due to this characteristic, hydraulic classification does not occur during backwashing, ensuring deep interception of pollutants and high pollutant-holding capacity of the filter layer. However, in actual operation, if the backwashing intensity is too high, causing the filter media to be washed away, this is called "sand loss." Sand loss leads to unsatisfactory pollutant interception effect, requiring continuous replenishment of filter media and increasing economic investment.
[0003] In winter, due to the drop in temperature, the dynamic viscosity of the water increases. If the backwashing intensity remains unchanged, the expansion rate will increase, making the filter bed more prone to sand loss and reducing the filter bed's filtration efficiency. Similarly, in summer, the temperature rises, the dynamic viscosity decreases, and if the backwashing intensity remains unchanged, it will be impossible to achieve the normal backwashing effect. Utility Model Content
[0004] This utility model mainly provides a sand filter backwashing anti-sand-run device for sand filter beds to solve the technical problems mentioned in the background art.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0006] A backwashing device for preventing sand runoff in a sand filter bed includes a sand filter bed, wherein a filtration mechanism is provided in the sand filter bed, and a temperature detection mechanism is provided inside the sand filter bed.
[0007] The temperature detection mechanism includes a support plate connected to the top of the sand filter tank, a thermometer connected to the top of the support plate, and a temperature sensing element connected to the bottom of the thermometer, wherein the temperature sensing element penetrates the support plate.
[0008] Furthermore, the support plate has through holes for the temperature sensing element to pass through.
[0009] Furthermore, the temperature sensing element is rotatably connected to multiple rotating rings via a rotating shaft. Adjacent rotating rings are connected by connecting rods, and multiple connecting rods are provided between adjacent rotating rings, with the multiple connecting rods surrounding the temperature sensing element.
[0010] Furthermore, the outer surface of the rotating ring is connected to a stirring blade.
[0011] Furthermore, a motor is connected to the upper surface of the support plate, and a first gear is connected to the output end of the motor. The first gear meshes with a second gear, and the second gear is connected to the outer surface of an adjacent rotating ring.
[0012] Furthermore, a protective box is connected to the bottom end of the support plate. The protective box is fitted over the outside of the first gear and the second gear. The protective box has a hole through which the temperature sensing element passes.
[0013] Furthermore, the filtration mechanism includes a main filtration pipe disposed in the sand filter media filter tank, with multiple filtration branch pipes connected to both ends of the main filtration pipe, and the main filtration pipe is connected to the backwashing channel.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] Firstly, this invention uses a temperature-sensing element to detect the temperature inside the sand filter bed, enabling workers to predict the hydrodynamics within the filter bed in a timely manner based on the temperature.
[0016] Secondly, this utility model connects two rotating rings via a connecting rod, enabling multiple rotating rings to rotate synchronously. Since the rotating rings are connected to the stirring blades, they drive the stirring blades to rotate. In this way, the stirring blades are driven to stir, thereby agitating the water in the sand filter media tank. This allows the temperature sensing element to detect the temperature of the water in the sand filter media tank, preventing the temperature sensing element from only detecting a part of the water.
[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the sand filter media filter tank of this utility model;
[0020] Figure 3 This is a schematic diagram of the temperature detection mechanism of this utility model;
[0021] Figure 4 This is a cross-sectional view of the protective box of this utility model.
[0022] In the diagram: 10. Sand filter media tank; 20. Filtration mechanism; 21. Main filtration pipe; 22. Branch filtration pipe; 30. Temperature detection mechanism; 31. Support plate; 311. Motor; 312. First gear; 313. Second gear; 314. Protective box; 32. Thermometer; 33. Temperature sensing element; 331. Rotating ring; 332. Connecting rod; 333. Stirring blade; 34. Through hole. Detailed Implementation
[0023] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.
[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0026] For an example, please refer to the appendix. Figure 1-4 A backwashing device for preventing sand runoff in a sand filter bed includes a sand filter bed 10, a filtration mechanism 20 in the sand filter bed 10, and a temperature detection mechanism 30 in the body of the sand filter bed 10.
[0027] The temperature detection mechanism 30 includes a support plate 31 connected to the top of the sand filter tank 10, a thermometer 32 connected to the top of the support plate 31, and a temperature sensing element 33 connected to the bottom of the thermometer 32. The temperature sensing element 33 penetrates the support plate 31.
[0028] It should be noted that, in this embodiment, the backwashing intensity is determined according to the formula for the expansion of quartz sand filter media.
[0029]
[0030] q—backwash intensity L / (m2.s)
[0031] d—Volume of spheres with the same filter media particle size (cm)
[0032] u—the dynamic viscosity of water, in Pa.s
[0033] e—Filter layer expansion rate
[0034] m—Porosity of the filter layer before expansion; typically 0.415 for quartz sand filter media.
[0035] In winter, due to the drop in temperature, the dynamic viscosity of the water increases. If the backwashing intensity remains constant, the expansion rate will increase, making the filter bed more prone to sand loss and reducing the filtration efficiency. Similarly, in summer, the temperature rises, and the dynamic viscosity decreases. If the backwashing intensity remains constant, normal backwashing effect cannot be achieved. This can be derived from the above formula:
[0036]
[0037] Therefore, the real-time water temperature inside the filter bed is fed back to the system and the corresponding dynamic viscosity is automatically calculated. Each time the filter bed needs to be backwashed, the optimal backwashing intensity can be automatically calculated and a signal is sent to the variable frequency backwashing pump to prevent sand from escaping from the filter bed.
[0038] For details, please refer to the appendix. Figure 1 and 2 The support plate 31 has a through hole for the temperature sensing element 33 to pass through.
[0039] The temperature sensing element 33 is rotatably connected to a plurality of rotating rings 331 via a rotating shaft. Adjacent rotating rings 331 are connected by connecting rods 332. A plurality of connecting rods 332 are provided between adjacent rotating rings 331, and the plurality of connecting rods 332 are arranged around the temperature sensing element 33.
[0040] The outer surface of the rotating ring 331 is connected to a stirring blade 333;
[0041] It should be noted that in this embodiment, the temperature sensing element 33 can pass through the through hole on the support plate 31, thereby facilitating the testing of the temperature inside the sand filter media 10 by means of the temperature sensing element 33.
[0042] Furthermore, two rotating rings 331 are connected by a connecting rod 332 so that multiple rotating rings 331 can rotate synchronously. Since the rotating rings 331 are connected to the stirring blades 333, they drive the stirring blades 333 to rotate. In this way, the stirring blades 333 are driven to stir, so as to agitate the water in the sand filter tank 10, so that the temperature sensing element 33 can detect the temperature of the water in the sand filter tank 10, and prevent the temperature sensing element 33 from only detecting a part of the water.
[0043] For details, please refer to the appendix. Figure 3 and 4 The upper surface of the support plate 31 is connected to a motor 311, and the output end of the motor 311 is connected to a first gear 312. The first gear 312 meshes with a second gear 313, and the second gear 313 is connected to the outer surface of an adjacent rotating ring 331.
[0044] The bottom end of the support plate 31 is connected to a protective box 314. The protective box 314 is sleeved on the outside of the first gear 312 and the second gear 313. The protective box 314 has a hole for the temperature sensing element 33 to pass through.
[0045] The filtration mechanism 20 includes a main filtration pipe 21 disposed in the sand filter tank 10. Multiple filter branch pipes 22 are respectively connected to both ends of the main filtration pipe 21. The main filtration pipe 21 is connected to the backwashing channel 23.
[0046] It should be noted that in this embodiment, the motor 311 is supported by the support plate 31, and the motor 311 drives the first gear 312 connected to its output shaft. The first gear 312 drives the second gear 313 meshing with its wheel body. Since the second gear 313 is connected to the rotating ring 331, it drives the rotating ring 331.
[0047] Furthermore, the first gear 312 and the second gear 313 are protected by a protective box 314, and the temperature sensing element 33 passes through a hole at the bottom of the protective box 314.
[0048] Furthermore, the backwashing of the sand filter media is achieved through the main filter pipe 21, the branch filter pipe 22, and the backwashing channel 23 to prevent sand from escaping.
[0049] The specific operation method of this utility model is as follows:
[0050] When using a sand filter bed, the motor 311 drives the first gear 312 connected to its output shaft, and the first gear 312 drives the second gear 313 meshing with its wheel body. Since the second gear 313 is connected to the rotating ring 331, it drives the rotating ring 331.
[0051] Two rotating rings 331 are connected by a connecting rod 332 so that multiple rotating rings 331 can rotate synchronously. Since the rotating rings 331 are connected to the stirring blades 333, they drive the stirring blades 333 to rotate. In this way, the stirring blades 333 are driven to stir, so as to agitate the water in the sand filter tank 10, so that the temperature sensing element 33 can detect the temperature of the water in the sand filter tank 10 and prevent the temperature sensing element 33 from only detecting a part of the water.
[0052] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.
Claims
1. A sand leakage prevention device for backwashing of a sand filter tank, comprising a sand filter tank (10), characterized in that, The sand filter tank (10) is equipped with a filtration mechanism (20), and the sand filter tank (10) is equipped with a temperature detection mechanism (30) inside the tank. The temperature detection mechanism (30) includes a support plate (31) connected to the top of the sand filter tank (10), a thermometer (32) connected to the top of the support plate (31), and a temperature sensing element (33) connected to the bottom of the thermometer (32), wherein the temperature sensing element (33) penetrates the support plate (31).
2. A sand filter backwash anti-sand leakage device according to claim 1, characterized in that, The support plate (31) has a through hole (34) on its body, which is used for the temperature sensing element (33) to pass through.
3. The sand filter backwash anti-sand leakage device according to claim 1, characterized in that, The temperature sensing element (33) is rotatably connected to a plurality of rotating rings (331) via a rotating shaft. Adjacent rotating rings (331) are connected by a connecting rod (332). A plurality of connecting rods (332) are provided between adjacent rotating rings (331), and the plurality of connecting rods (332) are arranged around the temperature sensing element (33).
4. The sand filter backwash anti-sand leakage device according to claim 3, characterized in that, The outer surface of the rotating ring (331) is connected to a stirring blade (333).
5. The sand filter backwash anti-sand leakage device according to claim 1, characterized in that, The upper surface of the support plate (31) is connected to a motor (311), and the output end of the motor (311) is connected to a first gear (312). The first gear (312) meshes with a second gear (313), and the second gear (313) is connected to the outer surface of an adjacent rotating ring (331).
6. A sand filter backwash anti-sand-loss device according to claim 1, wherein, The bottom end of the support plate (31) is connected to a protective box (314). The protective box (314) is sleeved on the outside of the first gear (312) and the second gear (313). The protective box (314) has a hole for the temperature sensing element (33) to pass through.
7. A sand filter backwash anti-sand-loss device according to claim 1, wherein, The filtration mechanism (20) includes a main filtration pipe (21) disposed in the sand filter tank (10), and multiple filter branch pipes (22) are respectively connected to both ends of the main filtration pipe (21). The main filtration pipe (21) is connected to the backwashing channel (23).