Liquid pumping system based on gas-liquid shared integrated joint

Abstract

The utility model provides a kind of liquid pumping system based on gas-liquid sharing integrated joint, technical solution is: including liquid storage barrel, the top of liquid storage barrel is connected with gas-liquid joint, the liquid inlet end of gas-liquid joint is connected with the liquid inlet end of diaphragm pump, the gas inlet end of gas-liquid joint is also connected with pressure pipeline, the liquid inlet end of gas-liquid joint is also connected with extension pipe.The utility model has the beneficial effects that (1) single joint replaces double interface: reduce the number of joint, material cost is reduced;(2) leakage path is reduced: reduce the probability of leakage, especially suitable for the sealing demand of hydrogen fluoride and other toxic media;(3) gas phase pressurization is safe and controllable: avoid hydrogen fluoride and air contact to produce white mist, gas pressure drives liquid flow simultaneously, then pump is extracted hydrogen fluoride, prevent liquid storage barrel from deformation due to gas pressure variation.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical conveying devices, and in particular to a liquid pumping system based on a gas-liquid integrated joint. Background Technology

[0002] Anhydrous hydrogen fluoride is an inorganic compound with the chemical formula HF. Under normal conditions, it is a colorless, toxic liquid with a pungent odor. It is highly hygroscopic and produces white fumes upon contact with air. It is readily soluble in water and can form hydrofluoric acid with water indefinitely.

[0003] Therefore, the safety requirements for the pressurized extraction of hydrofluoric acid from 200L drums are extremely high. An automated extraction system minimizes direct contact with hydrofluoric acid by personnel and significantly improves operational efficiency. During the extraction of hydrofluoric acid from the 200L drums, any problems could lead to the release of large amounts of white fumes, posing a serious risk to the safety of workers.

[0004] To reduce personnel contact with hydrofluoric acid and mitigate the risk of airborne contamination, a traditional gas-liquid dual-connection system was chosen. High-purity nitrogen gas was pressurized and introduced into the 200L cylinder through the gas end, forcing the electronic-grade hydrofluoric acid out through the liquid end. However, this method requires two connectors, increasing costs, and there are no protective measures in place should hydrofluoric acid leak at the connectors, resulting in a low safety factor. Summary of the Invention

[0005] To address the issues of high cost and low safety in the existing technologies, this utility model provides a liquid pumping system based on a gas-liquid integrated connector. The technical solution includes a liquid storage tank, the top of which is fixedly connected to the gas-liquid connector. The liquid outlet of the gas-liquid connector is connected to the liquid inlet of a diaphragm pump. The gas inlet of the gas-liquid connector is also connected to a pressurized pipeline, and the liquid inlet of the gas-liquid connector is also connected to an extension pipe.

[0006] In a preferred embodiment, the gas-liquid connector includes a housing with an internal cavity structure. A liquid phase pipe is installed inside the housing. One end of the liquid phase pipe is detachably connected to the inlet of the diaphragm pump via a pipe. The upper part of the liquid phase pipe is fixedly connected to the housing. The lower part of the liquid phase pipe is fixedly connected to the inner wall of the housing via several connecting rods. The other end of the liquid phase pipe is detachably connected to an extension pipe.

[0007] In a preferred embodiment, sealing rings are provided at both ends of the liquid phase pipeline.

[0008] In a preferred embodiment, a gas phase pipe is provided on the outer wall of the shell, and the gas phase pipe penetrates the outer wall of the shell.

[0009] In a preferred embodiment, the gas phase pipeline is also equipped with a sealing ring.

[0010] In a preferred embodiment, a connector extends from the lower part of the housing, and the outer wall of the connector is threaded. The connector is detachably connected to the top interface of the storage tank via the thread.

[0011] In a preferred embodiment, the end of the liquid phase pipeline connected to the diaphragm pump is provided with a thread, and the liquid phase pipeline is detachably connected to the liquid phase head through the thread.

[0012] In a preferred embodiment, the end of the gas phase pipeline connected to the pressurized pipeline is provided with a thread, and the gas phase pipeline is detachably connected to the gas phase head through the thread.

[0013] In a preferred embodiment, the gas source for the pressurized pipeline is an external nitrogen source.

[0014] In a preferred embodiment, the end of the extension tube is at least 0 cm from the bottom of the storage tank and at least 5 cm from the bottom of the tank.

[0015] The beneficial effects of this utility model are:

[0016] (1) Single connector replaces dual interface: Traditional liquid pumping systems require separate gas phase interface and liquid phase interface. This utility model integrates gas phase pipeline and liquid phase pipeline through the cavity structure of gas-liquid connector, reducing the number of connectors and reducing material costs by approximately (e.g., reducing the number of seals, pipeline interfaces and other accessories).

[0017] (2) Leakage path reduction: The integrated connector reduces potential leakage points (traditional double connectors require two barrel top interfaces). Combined with the triple sealing design of the sealing rings at both ends of the liquid phase pipeline and the sealing ring of the gas phase pipeline, the probability of leakage is reduced. It is especially suitable for the sealing requirements of highly toxic media such as hydrofluoric acid.

[0018] (3) Gas phase pressurization is safe and controllable: Nitrogen gas is injected into the storage tank through the pressurized pipeline via the gas phase pipeline to prevent hydrofluoric acid from coming into contact with air and producing white mist. At the same time, the gas pressure drives the liquid to flow, and then the hydrofluoric acid is extracted by a pump to prevent the storage tank from deforming due to changes in gas pressure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall system connection structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the gas-liquid connector in this utility model.

[0021] Figure 3 This is a bottom view of the gas-liquid connector in this utility model.

[0022] Figure 4This is a front view of the gas-liquid connector in this utility model.

[0023] In the diagram: 1. Storage tank; 2. Gas-liquid connector; 201. Shell; 202. Liquid phase pipeline; 203. Gas phase pipeline; 204. Liquid phase end cap; 205. Gas phase end cap; 206. Connector; 207. Sealing ring; 3. Diaphragm pump; 4. Pressurized pipeline; 5. Extension pipe; 6. Connecting rod. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Example

[0026] like Figure 1 The liquid pumping system shown is based on a gas-liquid integrated connector, including a liquid storage tank 1. The top of the liquid storage tank 1 is fixedly connected to a gas-liquid connector 2. The liquid outlet of the gas-liquid connector 2 is connected to the liquid inlet of a diaphragm pump 3 through a pipe. The air inlet of the gas-liquid connector 2 is also connected to a pressurized pipeline 4, and the liquid inlet of the gas-liquid connector 2 is also connected to an extension pipe 5.

[0027] like Figure 2-4 The gas-liquid connector 2 shown includes a housing 201 with a hollow internal structure. A liquid phase pipe 202 is installed inside the housing 201. One end of the liquid phase pipe 202 is detachably connected to the diaphragm pump 3 via a pipe. The upper part of the liquid phase pipe 202 is fixedly connected to the housing 201, and the lower part of the liquid phase pipe 202 is fixedly connected to the inner wall of the housing 201 via several connecting rods 6, dividing the internal space of the housing 201 into a liquid phase part and a gas phase part, with the gas phase part enclosing the liquid phase part. The other end of the liquid phase pipe 202 is detachably connected to the extension pipe 5.

[0028] Furthermore, both ends of the liquid phase pipeline 202 are provided with sealing rings 207. The two ends of the liquid phase pipeline 202 are connected to the pipeline and the extension pipe 5. The sealing rings 207 can increase the sealing of the connection and reduce the possibility of leakage.

[0029] Furthermore, a gas phase pipe 203 is provided on the outer wall of the housing 201. The gas phase pipe 203 penetrates the outer wall of the housing 201, so that the interior of the housing 201 is filled with nitrogen to form a protective layer. Even if the liquid phase pipe 202 located inside the housing 201 leaks, the hydrofluoric acid will not come into direct contact with the air to produce acid mist and cause safety problems, which further increases the safety of the joint.

[0030] Furthermore, the gas phase pipeline 203 is also provided with a sealing ring 207 to increase the airtightness between the gas phase pipeline 203 and the pressurized pipeline 4 and reduce gas leakage.

[0031] Furthermore, a connector 206 extends from the lower part of the housing 201. The outer wall of the connector 206 is provided with threads. The connector 206 is detachably connected to the top interface of the liquid storage tank 1 through the threads. When using the connector, the connector 206 is directly threaded to the interface of the liquid storage tank 1. The threaded connection has good airtightness and a stable connection.

[0032] Furthermore, the liquid phase pipeline 202 is provided with a thread at one end connected to the diaphragm pump 3. The liquid phase pipeline 202 is detachably connected to the liquid phase end cap 204 through the thread. The liquid phase end cap 204 protects the liquid phase interface when the connector is not in use, preventing hard objects from damaging the pipe head.

[0033] Furthermore, the gas phase pipe 203 is provided with a thread at one end where it connects to the pressurized pipe 4. The gas phase pipe 203 is detachably connected to the gas phase end cap 205 through the thread. The gas phase end cap 205 protects the gas phase interface when the connector is not in use, preventing hard objects from damaging the pipe head.

[0034] Furthermore, the gas source for the pressurized pipeline 4 is an external nitrogen gas source. Nitrogen gas does not react with hydrogen fluoride and can serve as a good protective gas and provide sufficient atmospheric pressure.

[0035] Furthermore, the end of the extension tube 5 is greater than 0 cm and less than or equal to 5 cm from the bottom of the storage tank 1, thereby reducing the amount of residual liquid in the storage tank 1.

[0036] Furthermore, the sealing ring is made of fluororubber or polytetrafluoroethylene, while the remaining parts in contact with hydrofluoric acid are made of fluoroplastics.

[0037] The process of using the above system is as follows: Remove the liquid phase head 204 and the gas phase head 205, connect the extension pipe 5 to the gas-liquid connector 2, thread the gas-liquid connector 2 to the interface of the storage tank 1, connect the gas phase pipeline 203 to the gas outlet of the pressurized pipeline 4, connect the liquid outlet of the liquid phase pipeline 202 to the liquid inlet of the diaphragm pump 3, and simultaneously turn on the diaphragm pump 3 and the pressurized pipeline 4 (maintaining a slight positive pressure within 0.5 kPa). The hydrofluoric acid in the tank is drawn out by the diaphragm pump 3 and pumped to other locations where hydrofluoric acid is needed. The housing 201 of the gas-liquid connector 2 is filled with nitrogen to form a protective layer and also provides sufficient atmospheric pressure for liquid extraction. After the hydrofluoric acid in the storage tank 1 has been completely extracted, turn off the diaphragm pump 3 and the pressurized pipeline 4.

Claims

1. A liquid pumping system based on a gas-liquid integrated connector, characterized in that, It includes a storage tank (1), the top of which is fixedly connected to a gas-liquid connector (2), the outlet end of the gas-liquid connector (2) is connected to the inlet end of the diaphragm pump (3), the air inlet end of the gas-liquid connector (2) is also connected to a pressurized pipeline (4), and the liquid inlet end of the gas-liquid connector (2) is also connected to an extension pipe (5).

2. The liquid pumping system based on a gas-liquid integrated connector according to claim 1, characterized in that, The gas-liquid connector (2) includes a housing (201), the inside of which is a cavity structure. A liquid phase pipe (202) is provided inside the housing (201). One end of the liquid phase pipe (202) is detachably connected to the inlet end of the diaphragm pump (3) through a pipe. The upper part of the liquid phase pipe (202) is fixedly connected to the housing (201). The lower part of the liquid phase pipe (202) is fixedly connected to the inner wall of the housing (201) through several connecting rods (6). The other end of the liquid phase pipe (202) is detachably connected to the extension pipe (5).

3. The liquid pumping system based on a gas-liquid integrated connector according to claim 2, characterized in that, Both ends of the liquid phase pipeline (202) are provided with sealing rings (207).

4. The liquid pumping system based on a gas-liquid integrated connector according to claim 2, characterized in that, The outer wall of the shell (201) is provided with a gas phase pipe (203), which penetrates the outer wall of the shell (201).

5. The liquid pumping system based on a gas-liquid integrated connector according to claim 4, characterized in that, The gas phase pipeline (203) is also provided with a sealing ring (207).

6. The liquid pumping system based on a gas-liquid integrated connector according to claim 2, characterized in that, The lower part of the housing (201) extends into a connector (206), and the outer wall of the connector (206) is provided with threads. The connector (206) is detachably connected to the top interface of the liquid storage tank (1) through the threads.

7. The liquid pumping system based on a gas-liquid integrated connector according to claim 2, characterized in that, The liquid phase pipeline (202) is connected to the diaphragm pump (3) at one end with a thread, and the liquid phase pipeline (202) is detachably connected to the liquid phase head (204) through the thread.

8. The liquid pumping system based on a gas-liquid integrated connector according to claim 4, characterized in that, The gas phase pipeline (203) is connected to the pressurized pipeline (4) at one end with a thread, and the gas phase pipeline (203) is detachably connected to the gas phase head (205) through the thread.

9. The liquid pumping system based on a gas-liquid integrated connector according to claim 1, characterized in that, The gas source for the pressurized pipeline (4) is an external nitrogen source.

10. The liquid pumping system based on a gas-liquid integrated connector according to claim 1, characterized in that, The end of the extension tube (5) is more than 0 cm and less than or equal to 5 cm from the bottom of the storage tank (1).

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