A flush and drain valve for a water storage tank
By designing a Y-shaped valve structure for the water tank flushing and drain valve, efficient and simultaneous flushing and draining are achieved, solving the problem of impurity accumulation in the water tank and improving cleaning efficiency and thoroughness. This system is suitable for retrofitting both new and old water heaters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO HAOQI METAL PRODUCTS CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-14
AI Technical Summary
Existing water heater storage tanks are prone to accumulating scale, sediment and other impurities during operation, leading to reduced heat exchange efficiency and deterioration of water quality. Traditional flushing methods are complicated and difficult to thoroughly clean, and cannot effectively solve the problem of impurity accumulation.
Design a Y-type valve structure, including a small-diameter inlet channel and a large-diameter outlet channel, to achieve synchronous flushing and sewage discharge through high-pressure water flow. The valve core structure allows for manual or automatic control, enabling synchronous operation of inlet and outlet.
It improves rinsing efficiency and thoroughness, shortens cleaning time, ensures complete removal of impurities, and has a simple structure that is easy to install and maintain.
Smart Images

Figure CN224497556U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sewage valve technology, specifically to a flushing and sewage valve for a water storage tank. Background Technology
[0002] During years of operation, existing water heater storage tanks are prone to accumulating scale, sediment, and other impurities. The presence of these impurities significantly reduces the heat exchange efficiency of the tank and degrades water quality, impacting user experience and health. Currently, traditional flushing methods typically employ intermittent drainage, sometimes requiring physical agitation or unidirectional gas flushing followed by manual draining. This method is not only complex and cumbersome, but also prevents flushing and drainage from occurring simultaneously, significantly extending the drainage time. More importantly, this method fails to achieve thorough flushing, leaving impurities behind in the tank and failing to effectively address the problem of impurity accumulation. Utility Model Content
[0003] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a flushing and draining valve for a water storage tank, comprising:
[0004] The valve body has a Y-shaped structure and includes a first port, a second port, and a third port. The first port is provided with a water inlet channel, the second port is provided with a flushing channel and a sewage discharge channel in parallel, and the third port is provided with a sewage discharge channel. The water inlet channel is connected to the flushing channel, and the sewage discharge channel is connected to the sewage discharge channel.
[0005] The valve core structure includes a first valve core disposed in the water inlet channel and a second valve core disposed in the sewage outlet channel, wherein the first valve core and the second valve core are manual valves or automatic valves.
[0006] Furthermore, the inner diameter of the flushing channel is smaller than the inner diameter of the sewage discharge channel.
[0007] Furthermore, the first valve core and the second valve core have the same structure. The first valve core includes a rotating valve core disposed in the water inlet channel. A valve core channel corresponding to the water inlet channel is disposed through the rotating valve core. A valve handle connected to the rotating valve core is rotatably disposed outside the water inlet channel, so that the rotating valve core rotates to realize the opening and closing of the water inlet channel.
[0008] Furthermore, the connecting ends of the water inlet channel, flushing channel, sewage discharge channel, and sewage outlet channel are respectively provided with standard pipe threads, flanges, or quick-connect interfaces.
[0009] The advantages of this utility model compared with the prior art are as follows:
[0010] (1) This utility model, through the design of a small-diameter water inlet, can generate high-pressure water flow, which can achieve efficient circulation flushing of the inside of the water storage tank. Compared with the traditional flushing method, it greatly improves the flushing effect and efficiency.
[0011] (2) By setting a large-diameter sewage outlet, this utility model significantly improves the discharge speed of impurities, and even larger particulate impurities can be discharged smoothly, ensuring the thoroughness of sewage discharge.
[0012] (3) This utility model achieves a synchronous operation mode of "one in and one out" by simultaneously carrying out water intake and sewage discharge, effectively shortening the time of the entire cleaning process and improving cleaning efficiency and thoroughness.
[0013] (4) The valve of this utility model has a simple overall structure and is very convenient for both installation and maintenance. It is not only suitable for newly installed water heaters, but also for the renovation of old water heaters, and has a wide market application prospect. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the upper part of a flushing and draining valve for a water storage tank according to the present invention.
[0015] Figure 2 This is a schematic diagram of the lower part of a flushing and draining valve for a water storage tank according to the present invention.
[0016] Figure 3 This is a schematic diagram of the internal cross-section of a flushing and draining valve for a water storage tank according to the present invention. Detailed Implementation
[0017] 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. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0018] Example:
[0019] Combined with appendix Figure 1-3This embodiment discloses a flushing and draining valve for a water storage tank, comprising: a valve body 100, which has a Y-shaped structure and includes a first port 101, a second port 102, and a third port 103; a water inlet channel 104 is provided in the first port 101, a flushing channel 105 and a draining channel 106 are arranged in parallel in the second port 102, and a draining water outlet channel 107 is provided in the third port 103; the water inlet channel 104 is connected to the flushing channel 105, and the draining channel 106 is connected to the draining water outlet channel 107; the inner diameter of the flushing channel 105 is smaller than the inner diameter of the draining channel 106.
[0020] The valve core structure 200 includes a first valve core 201 disposed in the water inlet channel 104 and a second valve core 202 disposed in the sewage outlet channel 107. The first valve core 201 and the second valve core 202 are manual valves or automatic valves.
[0021] The first valve core 201 and the second valve core 202 have the same structure. The first valve core 201 includes a rotating valve core 201a disposed in the water inlet channel 104. A valve core channel 201b corresponding to the water inlet channel 104 is disposed through the rotating valve core 201a. A valve handle 201c connected to the rotating valve core 201a is rotatably disposed outside the water inlet channel 104, so that the rotating valve core 201a rotates to realize the opening and closing of the water inlet channel 104.
[0022] The connection ends of the water inlet channel 104, flushing channel 105, sewage discharge channel 106 and sewage outlet channel 107 are respectively provided with standard pipe threads, flanges or quick-connect interfaces.
[0023] The valve body 100 provided by this utility model has a small-diameter inlet water channel 104 and a large-diameter outlet sewage channel 106. During connection, the inlet water channel 104 is used to connect to an external water source, increasing the water pressure entering the valve body 100. The flushing outlet of the flushing channel 105 is connected to the bottom of the water heater's storage tank, introducing high-pressure water into the tank for thorough flushing. The large-diameter outlet of the sewage channel 106 communicates with the bottom of the storage tank and is connected to the sewage channel 106 for quickly discharging impurities and flushing water from the tank. The valve body 100 provided by this utility model can be controlled by the valve core structure 200, allowing the flushing outlet and outlet to open simultaneously during flushing, achieving a "one inlet, one outlet" flushing and draining function. The valve core structure 200 is designed to allow manual or automatic control of the opening and closing of the three-way valve.
[0024] When a user needs to flush and maintain the water storage tank, firstly, the small-diameter inlet of the water inlet channel 104 is opened through the first valve core 201. Due to its small diameter, the inlet pressure can be effectively increased, thereby generating a high-pressure water flow. At the same time, the large-diameter drain outlet of the drain channel 106 is opened through the second valve core 202. The high-pressure water flow quickly enters the interior of the water storage tank and creates strong disturbance at the bottom of the tank, thoroughly and efficiently flushing the inner wall of the tank and all dead corners. During the flushing process, the impurities washed down will flow out quickly with the water flow through the large-diameter drain outlet connected to the drain hole at the bottom of the water storage tank. After flushing is completed, simply close the inlet and drain outlet to complete the maintenance operation of the entire water storage tank.
[0025] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A flushing and drain valve for a water storage tank, characterized in that, include: The valve body has a Y-shaped structure and includes a first port, a second port, and a third port. The first port is provided with a water inlet channel, the second port is provided with a flushing channel and a sewage discharge channel in parallel, and the third port is provided with a sewage discharge channel. The water inlet channel is connected to the flushing channel, and the sewage discharge channel is connected to the sewage discharge channel. The valve core structure includes a first valve core disposed in the water inlet channel and a second valve core disposed in the sewage outlet channel, wherein the first valve core and the second valve core are manual valves or automatic valves.
2. The flushing and drain valve for a water storage tank according to claim 1, characterized in that, The inner diameter of the flushing channel is smaller than the inner diameter of the sewage discharge channel.
3. A flushing and drain valve for a water storage tank according to claim 1, characterized in that, The first valve core and the second valve core have the same structure. The first valve core includes a rotating valve core disposed in the water inlet channel. A valve core channel corresponding to the water inlet channel is disposed through the rotating valve core. A valve handle connected to the rotating valve core is rotatably disposed outside the water inlet channel, so that the rotating valve core rotates to realize the opening and closing of the water inlet channel.
4. A flushing and drain valve for a water storage tank according to claim 1, characterized in that, The connection ends of the water inlet channel, flushing channel, sewage discharge channel, and sewage outlet channel are respectively equipped with standard pipe threads, flanges, or quick-connect interfaces.