A self-cleaning, pressure-free, silent, fully variable frequency water supply equipment

Abstract

This utility model discloses a self-cleaning, negative pressure-free, silent, fully variable frequency water supply device, relating to the technical field of water supply equipment. The utility model includes: a base, with support plates fixedly mounted at intervals in the middle of the base; a negative pressure-free tank embedded between two support plates; a filter element movably embedded inside the negative pressure-free tank; and open ends for the negative pressure-free tank; a removable sealing element located at both ports of the negative pressure-free tank; and a U-shaped pipe connecting the two negative pressure-free tank bodies at intervals. This utility model achieves quick disassembly and installation of the filter element by setting a connecting rod inserted inside the filter element, and a limiting disc, sealing plug, and threaded cap at the ports of the negative pressure-free tank. Operators only need to unscrew two threaded caps to complete the filter element replacement operation, greatly simplifying the filter element replacement process and improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water supply equipment technology, specifically to a self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment. Background Technology

[0002] In modern urban water supply systems and various building water supply scenarios, negative pressure-free water supply equipment is widely used due to its advantages such as energy saving, high efficiency, and avoidance of secondary pollution. This equipment connects to the municipal water supply network to achieve a stable water supply to users without generating negative pressure, and is equipped with filter cartridges to purify the water to meet users' requirements for water quality.

[0003] Currently, in negative pressure-free water supply equipment on the market, filter cartridges are usually installed inside the negative pressure-free tank. To ensure the equipment's airtightness, multiple small bolts are generally used to fix the tank cover to the port of the negative pressure-free tank. This installation method has revealed obvious defects in actual use: when replacing the filter cartridge, operators need to unscrew numerous small bolts one by one, making the disassembly process cumbersome and time-consuming. During installation, these small bolts must be tightened sequentially, which not only involves complex operation steps but also requires a high level of technical proficiency from the operator. In addition, frequent disassembly and installation of small bolts can easily lead to thread wear, affecting the sealing effect and even causing problems such as equipment leakage. Therefore, we propose a self-cleaning negative pressure-free silent full-frequency conversion water supply equipment to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A self-cleaning, negative pressure-free, silent, fully variable frequency water supply system includes:

[0006] The base has a support plate fixedly installed at a distance in the middle, and a negative pressure tank is embedded between the two support plates. A filter element is movably embedded inside the negative pressure tank, and the two ends of the negative pressure tank are open structures.

[0007] A seal is provided at both ports of the negative pressure-free tank, and the seal is removable;

[0008] A U-shaped pipe is spaced between the two negative pressure tanks, and a first electric three-way valve is provided on the U-shaped pipe near the negative pressure tank.

[0009] The main water inlet pipe has its side wall connected to the first electric three-way valve via a first guide pipe.

[0010] A backwash drain pipe is connected between the two aforementioned U-shaped pipes;

[0011] The L-shaped pipe has one end connected to the negative pressure tank above, and its bottom side is connected to the negative pressure tank below by a connecting pipe. A second electric three-way valve is installed on both the L-shaped pipe and the connecting pipe near the negative pressure tank.

[0012] A pressurizing assembly is used to pressurize the water entering the L-shaped pipe, and the pressurizing assembly is disposed between the bottom sides of the two support plates.

[0013] Furthermore, the sealing element includes a connecting rod inserted inside the filter element, a limiting plate is provided at both ports of the negative pressure tank, a sealing plug is provided on the inner side of the limiting plate, and the two ends of the connecting rod slide through the sealing plug and the limiting plate in sequence and are threadedly connected with threaded caps.

[0014] Furthermore, the sealing plug is a butyl rubber gasket, and its shape is conical.

[0015] Furthermore, a pull ring is fixed to the surface of the threaded cap.

[0016] Furthermore, the pressurization assembly includes an installation pipe connected to the other end of the L-shaped pipe, with branch pipes evenly spaced on the side wall of the installation pipe, and a product water pipe connected to the other end of the branch pipe. A first check valve is installed on the branch pipe near the product water pipe, and a water-cooled silent variable frequency pump is installed on at least three of the branch pipes. One of the branch pipes is connected to a second electric three-way valve through a second guide pipe.

[0017] Furthermore, a second check valve and a manual valve are installed near the water-cooled silent variable frequency pump in the body of the diversion pipe.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention differs from traditional negative pressure-free water supply equipment that uses numerous small bolts to fix the tank cover for filter cartridge installation. This device employs a unique sealing structure, which, through the connecting rod inserted inside the filter cartridge and the limiting plate, sealing plug, and threaded cap at the negative pressure-free tank port, enables quick disassembly and installation of the filter cartridge. Operators only need to unscrew two threaded caps to complete the filter cartridge replacement operation, greatly simplifying the filter cartridge replacement process, improving maintenance efficiency, and demonstrating high practicality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is another three-dimensional structural schematic diagram of this utility model;

[0022] Figure 3 This is a top view of the present invention;

[0023] Figure 4 This is a utility model Figure 3 Schematic diagram of cross-section along the AA direction.

[0024] Reference numerals: 1. Base; 2. Support plate; 3. Pressureless tank; 4. Filter element; 5. Seal; 501. Connecting rod; 502. Limiting plate; 503. Sealing plug; 504. Threaded cap; 505. Pull ring; 6. Pressurization assembly; 601. Installation pipe; 602. Diverter pipe; 603. Product water pipe; 604. First check valve; 605. Water-cooled silent full-frequency conversion pump; 606. Second guide pipe; 607. Second check; 608. Manual valve; 7. U-shaped pipe; 8. First electric three-way valve; 9. Main inlet pipe; 10. First guide pipe; 11. Backwash drain pipe; 12. L-shaped pipe; 13. Connecting pipe; 14. Second electric three-way valve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] This application provides a self-cleaning, negative pressure-free, silent, fully variable frequency water supply device, mainly to solve the problem that in existing technologies, when replacing filter cartridges, operators need to unscrew numerous small bolts one by one. The disassembly process is cumbersome and time-consuming, and during installation, these small bolts must be tightened sequentially. This not only involves complex operating procedures but also requires a high level of operator skill. Furthermore, frequent disassembly and installation of small bolts can easily lead to thread wear, affecting the sealing effect and even causing equipment leakage. The following technical solution is provided, which will be discussed in conjunction with... Figures 1-4 Please provide a detailed explanation:

[0027] A self-cleaning, negative pressure-free, silent, fully variable frequency water supply system includes:

[0028] The base 1 has a support plate 2 fixedly installed in the middle of the base 1 at intervals. A negative pressure tank 3 is embedded between the two support plates 2 at intervals. A filter element 4 is movably embedded inside the negative pressure tank 3. The two ends of the negative pressure tank 3 are open structures.

[0029] The sealing element 5 is provided at the two ports of the negative pressure tank 3. The sealing element 5 is detachable. The sealing element 5 includes a connecting rod 501 that is inserted inside the filter element 4. A limiting plate 502 is provided at the two ports of the negative pressure tank 3. A sealing plug 503 is provided on the inner side of the limiting plate 502. The two ends of the connecting rod 501 slide through the sealing plug 503 and the limiting plate 502 in sequence and are threadedly connected to a threaded cap 504.

[0030] The U-shaped pipe 7 is spaced between the two negative pressure tanks 3. A first electric three-way valve 8 is installed on the U-shaped pipe 7 near the negative pressure tank 3.

[0031] The main water inlet pipe 9 has its side wall connected to the first electric three-way valve 8 via the first guide pipe 10.

[0032] Backwash drain pipe 11 is connected between two U-shaped pipes 7;

[0033] L-shaped pipe 12, one end of L-shaped pipe 12 is connected to the negative pressure tank 3 above, and a connecting pipe 13 is connected between its bottom side and the negative pressure tank 3 below. A second electric three-way valve 14 is provided on both L-shaped pipe 12 and connecting pipe 13 near the negative pressure tank 3.

[0034] The pressurizing component 6 is used to pressurize the water entering the L-shaped pipe 12. The pressurizing component 6 is located between the bottom sides of the two support plates 2. The pressurizing component 6 includes an installation pipe 601 connected to the other end of the L-shaped pipe 12. The side wall of the installation pipe 601 is connected to the diversion pipe 602 at equal intervals. The other end of the diversion pipe 602 is connected to the water production pipe 603. A first check valve 604 is installed on the body of the diversion pipe 602 near the water production pipe 603. At least three diversion pipes 602 are equipped with water-cooled silent full frequency conversion pumps 605. One of the diversion pipes 602 is connected to the second electric three-way valve 14 through the second guide pipe 606.

[0035] Workflow Description

[0036] Normal water supply process:

[0037] Water from the municipal water supply network flows in through the main inlet pipe 9. When the pressure of the tap water supply network can meet the water demand, the water flows through the first guide pipe 10 and the first electric three-way valve 8 into the T-shaped pipe 7, and then directly supplies water to the user's network. At this time, the negative pressure tank 3 plays the role of stabilizing the water pressure and buffering the fluctuation of the water flow.

[0038] When the pressure of the tap water network cannot meet the water demand, the system pressure signal is fed back to the frequency converter (located in the control part of the pressurization component 6) by the pressure sensor. At this time, the pressurization component 6 starts to work. After the water enters the U-shaped pipe 7 through the first guide pipe 10 and the first electric three-way valve 8, some of the water enters the negative pressure tank 3 for storage and buffering. At the same time, the second electric three-way valve 14 of the L-shaped pipe and the connecting pipe 13 near the negative pressure tank 3 is opened, and the water in the negative pressure tank 3 enters the pressurization component 6 through the L-shaped pipe and the connecting pipe 13.

[0039] The water-cooled silent variable frequency pump 605 in the pressurization component 6 starts to pressurize the water entering the L-shaped pipe. The pressurized water is then transported to the user's pipe network through the installation pipe 601, the diversion pipe 602, and the production water pipe 603 to achieve constant pressure water supply. During this process, the system will automatically adjust the speed of the water-cooled silent variable frequency pump 605 according to the amount of water used to maintain a stable water supply pressure.

[0040] Filter element 4 replacement procedure:

[0041] When it is necessary to replace filter element 4, first close all valves related to negative pressure tank 3, including first electric three-way valve 8, second electric three-way valve 14, etc., to ensure that water in negative pressure tank 3 will not flow out.

[0042] Then, the operator unscrews the threaded cap 504 through the pull ring 505. Since the threaded cap 504 is threadedly connected to the connecting rod 501, and the connecting rod 501 slides through the sealing plug 503 and the limiting plate 502 in sequence, after unscrewing the threaded cap 504, the connecting rod 501 can be pulled out from the filter element 4 and the negative pressure tank 3 port.

[0043] As the connecting rod 501 is pulled out, the limiting plate 502 and the sealing plug 503 also disengage from the port of the negative pressure tank 3. At this time, the filter element 4 can be removed from the inside of the negative pressure tank 3 for replacement.

[0044] After replacing the filter element 4, place the new filter element 4 into the negative pressure tank 3, then install the limiting plate 502 and the sealing plug 503 in sequence. Insert the connecting rod 501 into the filter element 4 and pass through the sealing plug 503 and the limiting plate 502. Finally, tighten the threaded cap 504 to complete the replacement of the filter element 4.

[0045] Backwashing and sewage discharge process:

[0046] After the equipment has been running for a period of time, the filter element 4 needs to be backwashed to maintain its filtration effect. At this time, the backwash and sewage discharge process is started, and the backwash and sewage discharge pipe 11 is connected to two U-shaped pipes 7.

[0047] Some water enters the backwash drain pipe 11 from the U-shaped pipe 7. The water flow direction is opposite to that during normal water supply, which backwashes the filter element 4, washes off the impurities trapped on the filter element 4, and discharges it from the equipment through the backwash drain pipe 11.

[0048] During the backwashing process, the first electric three-way valve 8 and the second electric three-way valve 14 will switch on and off according to the preset program to ensure the smooth progress of the backwashing process. At the same time, the water pump in the pressurization component 6 may adjust its operating status to provide a suitable backwash water pressure.

[0049] This self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment differs from traditional negative pressure-free water supply equipment that uses numerous small bolts to fix the tank cover and install the filter element 4. This device adopts a unique sealing component 5 structure. By setting a connecting rod 501 inserted inside the filter element 4, as well as a limiting plate 502, sealing plug 503, and threaded cap 504 at the port of the negative pressure-free tank 3, it achieves quick disassembly and installation of the filter element 4. Operators only need to unscrew the two threaded caps 504 to complete the filter element 4 replacement operation, which greatly simplifies the filter element 4 replacement process and improves maintenance efficiency. This innovative structure avoids the thread wear problem caused by frequent disassembly of small bolts, ensures the sealing performance of the equipment, and reduces the risk of water leakage due to poor sealing.

[0050] like Figure 4 As shown, in some embodiments, the sealing plug 503 is a butyl rubber gasket, and its shape is conical. More specifically, butyl rubber has extremely low gas permeability and good chemical stability, which can effectively prevent leakage of media such as moisture and gas. During installation, the conical butyl rubber gasket, as the threaded cap 504 is tightened, forms a tight compression at the port 3 of the negative pressure tank. Its conical structure results in a larger sealing area and a more uniform pressure distribution. Compared with a flat sealing gasket, it can better fill any minor unevenness that may exist at the port, thereby significantly improving the sealing effect, preventing air from entering the tank and interfering with the negative pressure water supply state, and ensuring stable operation of the equipment.

[0051] like Figure 4 As shown, in some embodiments, a pull ring 505 is fixed to the surface of the threaded cap 504. More specifically, after tightening, the traditional threaded cap 504 is turned by relying solely on the friction between the fingers and the surface of the threaded cap 504. This is not only laborious to operate, but also prone to slippage, making it difficult to turn the threaded cap 504. This is especially true when the worker's hands are wet, the equipment has been used for a long time, or the threaded cap 504 is rusted, which greatly increases the difficulty of disassembly. However, with the pull ring 505, the worker can easily hold the pull ring 505 and apply greater torque through the lever principle, making it easier and less strenuous to turn the threaded cap 504. For example, when it is necessary to quickly replace the filter element 4 to restore the operation of the equipment, the worker can quickly unscrew the threaded cap 504 with the pull ring 505, reducing the replacement time of the filter element 4 and ensuring timely water supply.

[0052] like Figure 3As shown, in some embodiments, a second check valve 607 and a manual valve 608 are installed near the water-cooled silent variable frequency pump 605 on the diversion pipe 602. More specifically, the main function of the second check valve 607 is to prevent backflow of water and ensure safe operation of the equipment. When the water-cooled silent variable frequency pump 605 stops running, the water pressure in the system may change. Without a check valve, downstream water may flow back into the pump body, which will not only impact the pump impeller and other components, shortening the pump's service life, but may also cause the pump to reverse, damaging critical components such as the motor. The presence of the second check valve 607 allows for rapid closure the moment the pump stops operating, preventing reverse water flow, protecting the pump from backflow impact, and maintaining the stability of the entire water supply system. For example, when water consumption drops sharply at night and the pump stops operating, the second check valve 607 effectively prevents backflow caused by residual pressure in the pipe network, ensuring equipment safety. The manual valve 608 greatly facilitates equipment maintenance and repair. When repairing or replacing the water-cooled silent variable frequency pump 605, or cleaning or adjusting related pipelines, the manual valve 608 can be closed to cut off the water flow in the branch pipe 602, isolating the maintenance area from other parts of the water supply system. This allows workers to operate safely without water, without draining the entire system, significantly reducing maintenance workload and the scope of water outage impact. Furthermore, during equipment commissioning, the manual valve 608 can also be used to adjust the water flow in the branch pipe 602, working in conjunction with the automatic adjustment function of the variable frequency pump to precisely control the water supply to meet the water needs of different operating conditions and users.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-cleaning, negative pressure-free, silent, fully variable frequency water supply device, characterized in that: include: The base (1) has a support plate (2) fixedly installed in the middle of the base (1) at intervals. A negative pressure tank (3) is embedded between the two support plates (2) at intervals. A filter element (4) is movably embedded inside the negative pressure tank (3). The two ends of the negative pressure tank (3) are open structures. A seal (5) is provided at both ports of the negative pressure tank (3), and the seal (5) is removable; A U-shaped pipe (7) is spaced between the two negative pressure tanks (3). A first electric three-way valve (8) is provided on the U-shaped pipe (7) near the negative pressure tank (3). The main water inlet pipe (9) has its side wall connected to the first electric three-way valve (8) via the first guide pipe (10); A backwash drain pipe (11) is connected between the two U-shaped pipes (7); L-shaped pipe (12), one end of which is connected to the negative pressure tank (3) above, and a connecting pipe (13) is connected between its bottom side and the negative pressure tank (3) below. A second electric three-way valve (14) is provided on both the L-shaped pipe (12) and the connecting pipe (13) near the negative pressure tank (3). A pressurizing assembly (6) is used to pressurize the water entering the L-shaped pipe (12), and the pressurizing assembly (6) is disposed between the bottom sides of the two support plates (2).

2. The self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment according to claim 1, characterized in that, The sealing element (5) includes a connecting rod (501) inserted inside the filter element (4), a limiting plate (502) is provided at the two ports of the negative pressure tank (3), a sealing plug (503) is provided on the inner side of the limiting plate (502), and the two ends of the connecting rod (501) slide through the sealing plug (503) and the limiting plate (502) in sequence and are threadedly connected with a threaded cap (504).

3. The self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment according to claim 2, characterized in that, The sealing plug (503) is a butyl rubber gasket, and its shape is conical.

4. The self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment according to claim 2, characterized in that, A pull ring (505) is fixed to the surface of the threaded cap (504).

5. The self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment according to claim 1, characterized in that, The pressurization assembly (6) includes an installation pipe (601) connected to the other end of the L-shaped pipe (12). The side wall of the installation pipe (601) is connected to a diversion pipe (602) at equal intervals. The other end of the diversion pipe (602) is connected to a water production pipe (603). A first check valve (604) is installed on the body of the diversion pipe (602) near the water production pipe (603). At least three of the diversion pipes (602) are equipped with water-cooled silent variable frequency pumps (605). One of the diversion pipes (602) is connected to a second electric three-way valve (14) through a second guide pipe (606).

6. The self-cleaning, negative pressure-free, silent, fully variable frequency water supply equipment according to claim 5, characterized in that, The diversion pipe (602) is equipped with a second check valve (607) and a manual valve (608) near the water-cooled silent full-frequency pump (605).

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