Raw water tank for producing ultrapure water

Abstract

The utility model relates to a raw water tank for producing ultrapure water and relates to the field of pure water production, and the core innovation of the utility model is that an integrated mixing and self-cleaning assembly is arranged in the tank body, the assembly is rotated by the driving shaft of the motor, a linkage mechanism is formed by the central shaft, the sliding sleeve part and the telescopic mixing rod, the motor runs at low speed during normal operation, the assembly is used as a stirrer, the homogenization of the raw water quality can be effectively realized, the utility model has the outstanding advantages of having the on-line automatic descaling function, when the side wall scale needs to be cleaned, the motor speed is only needed to be increased, the increased centrifugal force will push the sliding sleeve part to move, the inner scraper part connected through the ring sleeve is pushed, the inner scraper part overcomes the pulling force of the elastic return member and extends outward until tightly abutting against the inner wall of the tank body, under the high-speed rotation, the inner scraper part uses the convex friction lines on the surface to strongly scrape the scale, the high integration of water quality mixing and equipment self-maintenance is realized, and the cleaning can be completed without stopping the machine and opening the tank.

Description

Technical Field

[0001] This utility model relates to the field of pure water production, and in particular to a raw water tank for ultrapure water production. Background Technology

[0002] In ultrapure water production processes, the raw water tank serves as the initial water storage unit, and the stability of its effluent quality is crucial for subsequent processes (such as reverse osmosis and electro-deionization). However, existing raw water tanks have significant design flaws. First, hydraulic dead zones exist within the tank, resulting in large fluctuations in effluent quality. This uneven raw water directly impacts and shortens the lifespan of the subsequent precision and expensive RO membranes and EDI modules. Second, during long-term stagnant or mixed processes, calcium and magnesium ions in the water readily precipitate on the inner wall of the tank, forming hard scale.

[0003] Currently, addressing scale buildup typically relies on periodic shutdowns and manual cleaning of the tank walls. This method is not only labor-intensive and costly, but it can also disrupt the entire ultrapure water production system, severely impacting continuous production efficiency. Therefore, there is an urgent need in this field for an integrated raw water tank solution that can simultaneously achieve efficient homogenization of raw water and automatically clean scale from the sidewalls online. Utility Model Content

[0004] The purpose of this invention is to provide a raw water tank for ultrapure water production to solve the problems mentioned in the background art.

[0005] The technical problem solved by this utility model is achieved through the following technical solution:

[0006] A raw water tank for ultrapure water production includes a tank body. The inner cavity of the tank body is equipped with a mixing component for homogenizing the raw water and cleaning scale from the side walls. The mixing component includes a main shaft with connecting plates mounted at its upper and lower ends. A central shaft is fixedly mounted on the main shaft, and external scraper portions are fixedly mounted at both ends of the central shaft. Each external scraper portion abuts against the inner wall of the tank body. A sliding sleeve portion is slidably mounted on the central shaft, and each sliding sleeve portion is connected to a telescopic mixing rod between the upper and lower connecting plates.

[0007] Preferably, the outer scraper portion is provided with an arc-shaped groove on the end face of the inner cavity side wall of the water tank, and an inner scraper portion is provided in the arc-shaped groove. A ring is fixedly connected to the inner scraper portion, and the ring is slidably sleeved on the central axis through the corresponding outer scraper portion.

[0008] Preferably, the outer end face of the inner scraper portion is provided with raised friction texture, and an elastic reset member is connected between the inner end face of the inner scraper portion and the side wall of the arc-shaped groove.

[0009] Preferably, a motor is fixedly installed on the upper surface of the water tank, and the output end of the motor passes through the inner cavity of the water tank and is connected to the main shaft through a gear set.

[0010] Preferably, the water tank body is equipped with a top cover on the upper end face and a water outlet is installed at the bottom of the water tank body.

[0011] The advantages and positive effects of this utility model are:

[0012] This invention integrates water mixing and homogenization with online cleaning of sidewall scale using a clever centrifugal drive mechanism. When the motor is running at low speed, the system only performs gentle stirring to homogenize the water. When descaling is required, simply increasing the speed will automatically trigger the inner scraper to extend and powerfully scrape the tank wall. This achieves automatic cleaning without interrupting production or opening the tank, thus greatly improving the protection of subsequent precision processing units and significantly reducing maintenance costs and workload. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a front view schematic diagram of the overall cross-section of a raw water tank for ultrapure water production according to this utility model;

[0015] Figure 2 This is a schematic diagram of the functional components in a raw water tank for ultrapure water production according to this utility model;

[0016] Figure 3 This is a schematic diagram of the top structure of the inner scraper section in a raw water tank for ultrapure water production according to this utility model;

[0017] Figure 4 This is a schematic diagram of the functional components in a raw water tank for ultrapure water production according to this utility model;

[0018] Figure 5 This is a schematic diagram of a specific embodiment of the present utility model.

[0019] The markings in the attached diagram are as follows: water tank body 10; top cover 11; motor 12; support column 13; water outlet 14; gear set 15; main shaft 16; telescopic mixing rod 17; sliding sleeve 18; central shaft 19; outer scraper 20; connecting plate 21; arc groove 22; inner scraper 23; ring sleeve 24. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in an illustrative manner. Therefore, they only show the components related to the present invention.

[0021] 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 many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0022] The following is combined with Figure 1-5 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of at least two components or the interaction relationship of at least two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The embodiments of this invention are further described in detail below with reference to the accompanying drawings:

[0024] Please see Figure 1-5This utility model provides an embodiment of a raw water tank for ultrapure water production, comprising a tank body 10. The inner cavity of the tank body 10 is provided with a mixing component for homogenizing the raw water quality and cleaning scale from the side walls. The mixing component includes a main shaft 16, with connecting plates 21 mounted at its upper and lower ends. Two central shafts 19 are fixedly mounted at the center of the main shaft 16, arranged horizontally and intersecting each other. External scraper portions 20 are fixedly mounted at both ends of each central shaft 19, with each external scraper portion 20 abutting against the inner wall of the tank body 10. Sliding sleeve portions 18 are slidably mounted on the central shafts 19, each of which... A telescopic mixing rod 17 is connected between the upper and lower connecting plates 21. A motor 12 is fixedly installed on the upper end face of the water tank 10. The output end of the motor 12 passes through the inner cavity of the water tank 10 and is connected to the main shaft 16 through a gear set 15. The top cover 11 of the water tank 10 can be opened. The motor 12 drives the main shaft 16 to rotate, thereby driving the telescopic mixing rod 17 to mix and stir the raw water, making the water quality more uniform and reducing the impact on subsequent precision treatment units such as reverse osmosis (RO) and electro-deionization (EDI). The raw water enters the subsequent process through the bottom outlet 14.

[0025] It should be noted that, in this embodiment, the outer scraper portion 20 has an arc-shaped groove 22 on the end face near the inner wall of the water tank 10. An inner scraper portion 23 is disposed in the arc-shaped groove 22, and a ring 24 is fixedly connected to the inner scraper portion 23. The ring 24 passes through the corresponding outer scraper portion 20 and is slidably sleeved on the central shaft 19. Raised friction textures are provided on the outer end face of the inner scraper portion 23. An elastic reset member is connected between the inner end face of the inner scraper portion 23 and the side wall of the arc-shaped groove 22. When it is found that there is a lot of scale on the inner wall of the water tank 10 that needs to be treated, the motor 1 is raised. The rotational speed of the main shaft 16 increases, causing the sliding sleeve 18 to slide closer to the outer scraper 20, thereby pressing against the ring 24. When the rotational speed reaches a certain level, the centrifugal force generated on the sliding sleeve 18 will be greater than the tension of the elastic reset member. The sliding sleeve 18 will push the ring 24 to slide closer to the inner wall of the water tank 10, thereby squeezing and abutting between the inner scraper 23 and the inner wall of the water tank 10. During the rotation, the inner scraper 23 is used to clean the scale on the inner wall of the water tank 10.

[0026] In practice, after a period of operation, the fiberglass or stainless steel inner wall of the ultrapure water system's raw water tank will accumulate calcium and magnesium ions, forming scale. If the monitoring system detects a slight increase in the raw water hardness, or if a cleaning procedure is required according to the pre-planned maintenance schedule, the cleaning process will need to be initiated.

[0027] Initial state:

[0028] The motor 12 runs at low speed, driving the main shaft 16 to rotate. At this time, the centrifugal force is small. The centrifugal force generated by the sliding sleeve 18 is less than the pre-tightening force of the elastic reset element (such as a spring). Therefore, the inner scraper 23 is completely retracted in the arc groove 22 of the outer scraper 20. The mixing component only performs the basic "water homogenization" function. The telescopic mixing rod 17 stirs the water flow. The outer scraper 20 keeps in contact with the inner wall of the tank, but only serves to prevent large pieces of dirt from adhering and does not perform strong scraping.

[0029] When the central control system or operator issues a "scale cleaning" command, the control unit of motor 12 receives the command and begins to gradually increase the motor speed. As the speed of the main shaft 16 increases sharply, the central shaft 19 fixed on it also rotates at high speed. The sliding sleeve 18, which is slidably mounted on the central shaft 19, begins to slide along the central shaft 19 away from the center of the main shaft, i.e., closer to the side wall of the water tank, under the action of huge centrifugal force. This sliding direction is towards the outer scraper 20 fixed on the outside. When a certain critical point is reached, the centrifugal force acting on the sliding sleeve 18 officially exceeds the tension of the elastic reset member behind the inner scraper 23. The end of the sliding sleeve 18 abuts and presses against the ring 24 slidably mounted on the central shaft 19.

[0030] The ring 24 is fixedly connected to the inner scraper 23. Therefore, the thrust of the sliding sleeve 18 is directly transmitted to the inner scraper 23 through the ring 24. Under the action of this thrust, the entire inner scraper 23 begins to slide outward from the arc groove 22 of the outer scraper 20, overcomes the contraction force of the elastic reset member, and moves towards the inner cavity side wall of the water tank 10. Almost instantly, the inner scraper 23 is fully extended, and the part with raised friction texture on its outer end face is tightly squeezed and abutted against the inner side wall of the water tank 10.

[0031] At this time, the motor 12 maintains a high speed. The high-speed rotating main shaft 16, through the central shaft 19 and the outer scraper part 20, drives the extended inner scraper part 23 to rotate at high speed around the central axis of the water tank. During the rotation, the raised friction texture of the inner scraper part 23 generates strong scraping and friction with the inner wall of the tank, effectively scraping away the scale attached to the side wall. The scraped scale debris will fall into the original water at the bottom of the water tank. The scale sediment accumulated at the bottom of the water tank can be removed during subsequent emptying and cleaning.

[0032] In summary, this invention integrates water mixing and homogenization with online cleaning of sidewall scale using a clever centrifugal drive mechanism. When the motor is running at low speed, the system only performs gentle stirring to homogenize the water. When descaling is required, simply increasing the speed will automatically trigger the inner scraper to extend and powerfully scrape the tank wall. This achieves automatic cleaning without interrupting production or opening the tank, thus greatly enhancing the protection of subsequent precision processing units and significantly reducing maintenance costs and workload.

[0033] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A raw water tank for ultrapure water production, comprising a tank body (10), characterized in that: The inner cavity of the water tank (10) is provided with a mixing component for homogenizing raw water quality and cleaning scale on the side wall. The mixing component includes a main shaft (16), with connecting plates (21) installed at the upper and lower ends of the main shaft (16). A central shaft (19) is fixedly installed on the main shaft (16), and external scraper parts (20) are fixedly installed at both ends of the central shaft (19). Each external scraper part (20) abuts against the inner wall of the water tank (10). A sliding sleeve part (18) is slidably installed on the central shaft (19), and each sliding sleeve part (18) is connected to the upper and lower connecting plates (21) by a telescopic mixing rod (17).

2. The raw water tank for ultrapure water production according to claim 1, characterized in that: The outer scraper part (20) is provided with an arc-shaped groove (22) on the end face of the inner cavity side wall of the water tank body (10). An inner scraper part (23) is provided in the arc-shaped groove (22). A ring sleeve (24) is fixedly connected to the inner scraper part (23). The ring sleeve (24) passes through the corresponding outer scraper part (20) and is slidably sleeved on the central shaft (19).

3. The raw water tank for ultrapure water production according to claim 2, characterized in that: The inner scraper part (23) has raised friction texture on its outer end face, and an elastic reset member is connected between the inner end face of the inner scraper part (23) and the side wall of the arc groove (22).

4. The raw water tank for ultrapure water production according to claim 3, characterized in that: A motor (12) is fixedly installed on the upper end face of the water tank (10). The output end of the motor (12) passes through the inner cavity of the water tank (10) and is connected to the main shaft (16) by a gear set (15).

5. The raw water tank for ultrapure water production according to claim 1, characterized in that: The water tank (10) is equipped with a top cover (11) on its upper end face, and a water outlet (14) is installed at the bottom of the water tank (10).

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