Liquid supply line device with non-return function

Abstract

The utility model relates to liquid delivery technical field, concretely relates to a liquid supply pipeline device with check function, including cavity, spring, limit cylinder, floating piston and drain, the both sides of cavity are respectively set up and set up drain, the bottom of cavity is equipped with liquid inlet, the central position of cavity is equipped with limit cylinder, spring and floating piston are located in the inside of limit cylinder, and floating piston is equipped at the bottom of spring. The utility model discloses a liquid supply pipeline device with check function: effectively prevent backflow, fold loss low, drain dead angle, maintenance cost is low, and the simple efficiency of replacement is high.

Description

Technical Field

[0001] This utility model relates to the field of liquid transportation technology, specifically to a liquid supply pipeline device with a backflow check function. Background Technology

[0002] In liquid delivery systems used in chemical, pharmaceutical, and food processing industries, the following technical challenges are commonly observed:

[0003] 1. Pump stoppage backflow contamination: When the transfer pump stops working, the residual liquid in the pipeline flows back to the storage tank under gravity or siphon effect;

[0004] 2. High-frequency conveying efficiency loss: For conveying lines with short cycle start-stop (such as electroplating lines that switch tank solutions every 5 minutes), the response time of traditional check valves is >0.5 seconds, and the amount of liquid returned in a single flow reaches 15% of the pipe capacity;

[0005] 3. Dead zones in drainage create hidden dangers: The existing drainage structure of the three-way valve + ball valve has 15%-20% residual dead zones;

[0006] 4. Pressure shock damages equipment: The "water hammer effect" caused by a sudden pump stoppage generates a pressure shock of 10 times the working pressure, resulting in high maintenance costs;

[0007] To alleviate backflow problems, the industry generally adopts a triple redundancy design of "check valve + pressure relief valve + vent valve", which results in a 40% increase in pipeline joints, a 300% increase in the probability of leakage points, extremely high valve group procurement costs, long monthly disassembly and inspection time, and high labor intensity.

[0008] Therefore, there is an urgent need to design a liquid supply pipeline device with a check valve function to solve the problems of easy backflow, large damage, dead zone in drainage, high maintenance cost, and time-consuming and labor-intensive maintenance in the existing technology. Utility Model Content

[0009] In view of the problems existing in the prior art, the purpose of this utility model is to provide a liquid supply pipeline device with a check function.

[0010] The technical solution adopted by this utility model to solve its technical problem is: a liquid supply pipeline device with check function, including a cavity, a spring, a limiting cylinder, a floating piston and a drain port. A liquid outlet and a liquid drain port are respectively opened on both sides of the cavity. A liquid inlet is provided at the bottom of the cavity. A limiting cylinder is provided at the center of the cavity. The spring and the floating piston are located inside the limiting cylinder. The floating piston is located at the bottom of the spring.

[0011] Specifically, the cavity has an inlet at the bottom, which is connected to an inlet pipe, and an outlet and a drain on both sides of the cavity, which are connected to an infusion pipe.

[0012] Specifically, the top of the spring is fixedly connected to the cavity, and the bottom of the spring is fixedly connected to the floating piston.

[0013] Specifically, the limiting cylinder is welded to the center of the cavity, the size of the limiting cylinder is larger than that of the floating piston, and the limiting cylinder is provided with filter holes, which are evenly distributed on the entire body of the limiting cylinder.

[0014] Specifically, the bottom of the floating piston is a conical sealing surface, the top of the floating piston is fixedly connected to the spring, and the bottom of the floating piston is pressed against the liquid inlet by the spring's extension and contraction force.

[0015] Specifically, the drain port adopts a funnel-shaped structure, with the larger end of the drain port located inside the cavity and the smaller end extending outside the cavity. A drain valve is connected to the outside of the drain port.

[0016] This utility model has the following beneficial effects:

[0017] The liquid supply pipeline device with check function designed in this utility model effectively prevents backflow, has low damage, no dead corners in drainage, low maintenance cost, and is simple and efficient to replace. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a liquid supply pipeline device with a check valve function.

[0019] Figure 2 This is a schematic diagram of a liquid supply pipeline device with a backflow check function installed on a liquid delivery pipeline.

[0020] In the diagram: 1-Cavity, 1.1-Inlet, 1.2-Inlet pipe, 1.3-Outlet, 1.4-Outlet pipe; 2-Spring; 3-Limiting cylinder; 4-Floating piston; 5-Drain port, 5.1-Drain valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be described in further detail below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Example 1:

[0023] like Figures 1-2 As shown, a liquid supply pipeline device with a check valve function includes a cavity 1, a spring 2, a limiting cylinder 3, a floating piston 4, and a drain port 5. A liquid outlet 1.3 and a liquid drain port 5 are respectively opened on both sides of the cavity 1. A liquid inlet 1.1 is provided at the bottom of the cavity 1. A limiting cylinder 3 is provided at the center of the cavity 1. The spring 2 and the floating piston 4 are located inside the limiting cylinder 3, and the floating piston 4 is located at the bottom of the spring 2.

[0024] The cavity 1 has a three-way structure. The bottom of the cavity 1 is provided with a liquid inlet 1.1, and the liquid inlet 1.1 is connected to the liquid inlet pipe 1.2. The bottom sides of the cavity 1 are respectively provided with a liquid outlet 1.3 and a liquid drain 5. The liquid outlet 1.3 is connected to the liquid outlet pipe 1.4. The cavity 1 is provided with a limiting cylinder 3, a spring 2 and a floating piston 4. The cavity 1 is used for the installation of various components.

[0025] The top of the spring 2 is fixedly connected to the cavity 1, and the bottom of the spring 2 is fixedly connected to the floating piston 4. The spring 2 is used to control the up and down movement of the floating piston 4.

[0026] The limiting cylinder 3 is welded to the center of the cavity 1. The limiting cylinder 3 is sleeved on the outside of the spring 2 and the floating piston 4. The limiting cylinder 3 is used to limit the spring 2 and the floating piston 4 to prevent backflow. The limiting cylinder 3 has filter holes evenly drilled on its body. The filter holes are used to perform shallow filtration of the liquid.

[0027] The bottom of the floating piston 4 adopts an inverted conical structure, and the top of the floating piston 4 is fixedly connected to the spring 2. When liquid begins to enter the inlet pipe 1.2, the pressure of the liquid will push the floating piston 4 open, allowing the liquid to enter through the limiting cylinder 3 and flow into the outlet pipe 1.4 from the outlet 1.3. When the liquid entry stops, the floating piston 4 is pushed against the inlet 1.1 by the restoring force of the spring 2 to prevent the liquid from flowing back.

[0028] The drain port 5 is located on the bottom of the cavity 1, symmetrical to the outlet 1.3. The outlet 1.3 is in the shape of a flared mouth. The large end of the outlet 1.3 is located inside the cavity 1, and the small end of the outlet 1.3 extends out of the cavity 1 and is connected to the drain valve 5.1. The drain valve 5.1 is used to control the opening and closing of the drain.

[0029] Example 2: Specific implementation steps using the structural form of Example 1.

[0030] As needed, one end of the pump can be connected to the liquid storage device via a pipe, and the other end can be connected to the liquid supply pipeline device with check function via a pipeline. When working, the floating piston 4 is in the closed state, and the pump pumps the liquid in the liquid storage device to the liquid supply pipeline device with check function. The liquid then flows out through the inlet 1.1 and the outlet 1.3. After stopping work, the liquid is intercepted by the floating piston 4 and remains in the cavity 1. When working again, the liquid remaining in the cavity 1 is directly pumped out. Alternatively, the liquid in the cavity 1 can be released by opening the drain valve 5.1.

[0031] This utility model is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

[0032] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid supply pipeline device with a check valve function, characterized in that, It includes a cavity, a spring, a limiting cylinder, a floating piston, and a drain port. The cavity has an outlet and a drain port on both sides, an inlet at the bottom, and a limiting cylinder at the center. The spring and the floating piston are located inside the limiting cylinder, with the floating piston located at the bottom of the spring.

2. The liquid supply pipeline device with check valve function according to claim 1, characterized in that, The cavity has an inlet at the bottom, which is connected to an inlet pipe. An outlet and a drain are respectively opened on both sides of the cavity, and the outlet is connected to an infusion pipe.

3. The liquid supply pipeline device with check valve function according to claim 1, characterized in that, The top of the spring is fixedly connected to the cavity, and the bottom of the spring is fixedly connected to the floating piston.

4. The liquid supply pipeline device with check valve function according to claim 1, characterized in that, The limiting cylinder is welded to the center of the cavity. The size of the limiting cylinder is larger than that of the floating piston. The limiting cylinder is provided with filter holes, which are evenly distributed throughout the cylinder body.

5. The liquid supply pipeline device with check valve function according to claim 1, characterized in that, The bottom of the floating piston is a conical sealing surface, the top of the floating piston is fixedly connected to the spring, and the bottom of the floating piston is sealed at the liquid inlet by the spring's restoring force.

6. The liquid supply pipeline device with check valve function according to claim 1, characterized in that, The drain port adopts a funnel-shaped structure, with the larger end of the drain port located inside the cavity and the smaller end extending outside the cavity. A drain valve is connected to the outside of the drain port.

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