An automatically switchable chemical liquid pouring groove device

Abstract

The utility model discloses a kind of chemical liquid pouring groove devices that can be automatically switched, it is related to chemical process equipment technical field.The device includes the source tank of being set in high position, the target tank of being set in low position, and the siphon pipeline connecting both.The siphon pipeline one end inserts source tank bottom, the other end is connected target tank, is equipped with first valve.The siphon pipe downstream section is equipped with three-way joint, and is connected with source tank outlet pump by liquid injection branch, second valve and check valve are sequentially arranged on liquid injection branch.By opening second valve liquid injection can form self-closing state, maintain siphon passage full, directly realize siphon pouring after opening first valve.The device structure is simple, convenient to operate, applicable to the closed transfer occasion of volatile or corrosive liquid.

Description

Technical Field

[0001] This utility model relates to the field of chemical process equipment technology, and in particular to a chemical liquid transfer device that can automatically switch between different types. Background Technology

[0002] In chemical production processes, it is often necessary to transfer chemical liquids from one reaction unit or storage tank to another process equipment or tank; this process is commonly referred to as "tank transfer." Existing tank transfer methods mostly employ manual pipe connections or temporary pumping, which are not only cumbersome to operate and prone to liquid leaks, corrosion damage, or safety hazards, but also, when dealing with storage tank structures with height differences, while the siphon method has advantages such as low energy consumption and simple structure, its startup process relies on manual priming, resulting in severe air resistance problems within the pipeline, making it difficult to establish a siphon, and seriously affecting operational efficiency and stability.

[0003] In addition, although some automated troughing equipment has achieved electronic start and stop, it still needs to frequently vent or rely on external auxiliary equipment to maintain the siphon state. It lacks a long-term mechanism to maintain the liquid state in the siphon tube, and the siphon path is very easy to be interrupted. Utility Model Content

[0004] The purpose of this invention is to provide an automatically switchable chemical liquid transfer device. Through a specific pipeline layout and valve combination, it can quickly establish a siphon passage, maintain self-closure, and remotely control opening, effectively improving the safety, convenience, and automation level of chemical transfer operations.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatically switchable chemical liquid transfer device includes a source tank, a target tank, and a siphon pipeline. The source tank is positioned at a higher level, and the target tank is positioned at a lower level, with a height difference between them. One end of the siphon pipeline is inserted from the top of the source tank and extends to near the bottom of the tank. The other end is connected to the top or upper side wall of the target tank and is equipped with a first valve. The downstream section of the siphon pipeline is equipped with a tee connector. The third connection port of the tee connector is connected to the outlet end of the source tank's outlet pump via a pipeline. A second valve and a third valve are sequentially installed on the pipeline. The third valve is a check valve, and its installation direction restricts the liquid flow to the siphon pipeline only from the outlet pump, preventing backflow. Before the transfer operation, by opening the second valve, liquid can be injected into the siphon pipeline from the outlet pump to form a self-sealing state. After closing the second valve, the siphon pipeline is kept filled with liquid. After opening the first valve, the siphon transfer operation is directly realized.

[0006] Furthermore, an automatic air vent valve is provided at the highest point of the siphon pipeline to release gas during the liquid filling process, thereby improving the pipeline filling efficiency.

[0007] Furthermore, both the first and second valves are electric valves and are connected to the PLC control system, which can realize the automated control of the siphon injection and tank emptying process.

[0008] Furthermore, the third valve is a spring-return check valve, and its installation direction limits the flow of liquid only from the outlet pump to the siphon pipeline.

[0009] Compared with the prior art, the present invention has the following beneficial effects: This utility model allows for rapid filling of the siphon pipe by setting a three-way connector and a check valve on the siphon pipe, forming a self-closed liquid path. This significantly reduces the difficulty of establishing a siphon. At the same time, after filling, the liquid is maintained by closing the valve, preventing the pipe from failing due to air resistance. This achieves preloading of the siphon function and makes the operation more efficient. An automatic air vent valve is added to the siphon passage to automatically discharge gas, further improving liquid filling efficiency and ensuring stable operation; All key valves can be configured with electric actuators and connected to a PLC system, supporting remote or automatic troughing operations, thereby improving the system's automation level and safety performance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Among them, 1. Source tank; 2. Target tank; 3. Siphon pipeline; 4. First valve; 5. T-connector; 6. Second valve; 7. Third valve; 8. Source tank outlet pump; 9. Automatic exhaust valve. Detailed Implementation

[0012] The following will describe the technology of the embodiments of the present utility model clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0013] Reference Figure 1This embodiment provides an automatically switchable chemical liquid transfer device, including a source tank 1, a target tank 2, and a siphon pipe 3. The source tank 1 is positioned at a higher level, and the target tank 2 is positioned at a lower level, with a height difference between them. One end of the siphon pipe 3 is inserted from the top of the source tank 1 and extends to near the bottom of the tank body, while the other end is connected to the top or upper side wall of the target tank 2. A first valve 4 is installed at the end of the siphon pipe 3 near the target tank 2. A tee connector 5 is provided in the downstream section of the siphon pipe 3. The three interfaces of the tee connector 5 are the first interface, connected to the source tank 1, and the target tank 2. The main section of the siphon pipe in the direction of the source tank 1 is connected; the second interface is connected to the target tank 2 and is equipped with a first valve 4; the third interface is connected to the outlet end of the source tank outlet pump 8 through a pipeline, and a second valve 6 and a third valve 7 are sequentially installed on the pipeline. The third valve 7 is a check valve. The installation direction of the third valve 7 limits the liquid to flow only from the source tank outlet pump 8 to the siphon pipe 3 to prevent liquid backflow. This allows the outlet pump to inject liquid into the siphon pipe to form a self-sealing state before the tank emptying operation by opening the second valve 6. After closing the second valve 6, the liquid filling state in the siphon pipe can be maintained. After opening the first valve 4, the siphon emptying operation can be directly realized.

[0014] This embodiment achieves the following functions: Before the tank emptying operation, the operator or control system can open the second valve 6 and start the source tank outlet pump 8, thereby injecting liquid into the siphon pipe 3. Simultaneously, as the liquid enters the main siphon pipe through the tee connector 5, air in the siphon pipe 3 is pushed upwards and expelled, gradually filling the pipe with liquid and forming a "self-sealing" state. Then, the second valve 6 is closed. Because the third valve 7 is a check valve and the first valve 4 is closed, the liquid column in the siphon pipe 3 can remain stable and prevent backflow for a long time. When the first valve 4 is opened, the siphon emptying operation can be completed directly without manual liquid injection or air extraction.

[0015] Specifically, an automatic air vent valve 9 is provided at the highest point of the siphon pipe 3. During the liquid filling process, the air is discharged by the automatic air vent valve 9 at the highest point of the siphon pipe, thereby improving the filling efficiency of the pipe.

[0016] Specifically, both the first valve 4 and the second valve 5 are electric valves and are connected to the PLC control system, which can realize the automated control of the siphon injection and tank emptying process.

[0017] Specifically, the third valve 7 is a spring-return check valve, and its installation direction limits the liquid to flow only from the outlet pump to the siphon pipeline.

[0018] The working principle of this embodiment is as follows: By constructing a siphon-type tank-turning circuit with automatic liquid injection and self-sealing functions, this utility model enables the rapid establishment of a siphon and the tank-turning operation between chemical tanks with height differences without the need for repeated manual filling or evacuation, thereby improving operational safety and automation.

[0019] In the initial state, the siphon pipe 3 is filled with air and cannot directly establish a siphon effect. To achieve the pre-filling operation, the operator first opens the second valve 6 and starts the source tank outlet pump 8, so that the liquid enters the third interface of the three-way connector 5 from the source tank 1 through the outlet pump 8 and the liquid injection branch, and is transported from the source tank 1 end to the target tank 2 end along the siphon pipe 3.

[0020] During the liquid injection process, the air in the siphon pipe 3 is pushed by the liquid towards one side of the target tank 2 and discharged from the other end of the pipe. At the same time, the automatic air vent valve 9, located at the highest point of the siphon pipe 3, plays a simultaneous role in assisting to discharge the gas accumulated in the pipe, thereby significantly improving the filling efficiency of the pipe and avoiding air resistance or local air bubbles from affecting siphon formation.

[0021] When the siphon line 3 is basically full of liquid, close the second valve 6. Due to the one-way limiting effect of the check valve 7, the liquid will not flow back to the injection branch, and the siphon line 3 can maintain a stable self-sealing liquid column state.

[0022] Subsequently, when the operator opens the first valve 4, the siphon passage is opened. Driven by the difference between the high and low liquid levels, the liquid in the siphon pipe 3 flows from the source tank 1 into the target tank 2, forming a continuous tank-turning process until the liquid level in the source tank is lower than the siphon inlet or the first valve 4 is actively closed.

[0023] This process is highly automated and easy to operate, making it particularly suitable for closed transfer scenarios involving volatile and corrosive chemical liquids. It can effectively reduce the risks of manual operation and improve liquid switching efficiency and system safety.

Claims

1. An automatically switchable chemical liquid transfer device, comprising a source tank, a target tank, and a siphon pipeline, wherein the source tank is positioned at a higher level, and the target tank is positioned at a lower level, with a height difference between them; one end of the siphon pipeline is inserted from the top of the source tank and extends to near the bottom of the tank, and the other end is connected to the top or upper sidewall of the target tank, and a first valve is provided thereon, characterized in that... The downstream section of the siphon pipe is equipped with a T-joint. The third connection port of the T-joint is connected to the outlet end of the source tank outlet pump through a pipeline. A second valve and a third valve are sequentially installed on the pipeline. The third valve is a check valve. The installation direction of the third valve restricts the liquid to flow only from the outlet pump to the siphon pipe.

2. The automatically switchable chemical liquid transfer device according to claim 1, characterized in that, An automatic air vent valve is installed at the highest point of the siphon pipe.

3. The automatically switchable chemical liquid transfer device according to claim 2, characterized in that, Both the first and second valves are electric valves and are connected to the PLC control system.

4. The automatically switchable chemical liquid transfer device according to claim 3, characterized in that, The third valve is a spring-return check valve, and its installation direction limits the liquid flow only from the outlet pump to the siphon pipeline.

Images