Hydrofluoric acid sampling device

Abstract

The utility model relates to the field of hydrofluoric acid sampling, in particular to a hydrofluoric acid sampling device which comprises a sampling shell, the top of the sampling shell is in threaded connection with a sealing cover, a sampling structure is arranged on the surface of the sampling shell, and the sampling structure comprises a sampling pipe. A sampling pump is arranged on the surface of the sampling pipe, a threaded cover is in threaded connection with an end opening of the sampling pipe, a separation assembly is arranged in the sampling shell, a neutralization assembly is arranged in the sampling shell, one end, far away from the threaded cover, of the sampling pipe penetrates into the lower end of the sampling shell, the separation assembly comprises a separation plate, and the separation plate is arranged in the middle of the sampling shell. An air inlet pipe is fixedly connected to the center of the partition plate, a one-way valve is arranged on the surface of the air inlet pipe, and the neutralizing assembly comprises an internal thread. According to the hydrofluoric acid sampling device, the sampling structure is arranged, so that hydrofluoric acid steam is prevented from hurting a human body, and the safety of hydrofluoric acid sampling is ensured.

Description

Technical Field

[0001] This utility model relates to the field of hydrofluoric acid sampling, and in particular to a hydrofluoric acid sampling device. Background Technology

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas. It is clear, colorless to pale yellow, and has a strong, pungent odor. It is a weak acid, but extremely corrosive, capable of severely corroding metals, glass, and silicon-containing materials. In laboratories, hydrofluoric acid is commonly used as a strong acidic corrosive agent and analytical reagent for etching glass and acid-washing metals. Industrially, it is used to manufacture fluorides, fluorocarbons, cryolite, and other inorganic and organic fluorides, as well as as a catalyst in petrochemicals. Furthermore, hydrofluoric acid is used for engraving and lettering on glass instruments, utensils, and mirrors; acid-washing of non-ferrous metals and stainless steel; desanding of metal castings; and frosting of light bulbs. Hydrofluoric acid sampling is typically for chemical analysis to determine whether its purity, moisture content, acidity, evaporation residue, and other technical indicators meet specific product quality standards. These indicators are crucial for the application of hydrofluoric acid in the electronics, chemical, and semiconductor industries.

[0003] A search revealed Chinese Patent Publication No. CN220454956U, which discloses a closed sampling device for hydrofluoric acid. The device involves removing an air pump from a container and using it to push gas into the solution chamber through a tubing. This increases the pressure inside the solution chamber. The pressure difference between the solution chamber and the tubing allows the hydrofluoric acid solution inside to flow out through the tubing to the outside of the main body. The air pump further increases the gas pressure inside the solution chamber, enabling the hydrofluoric acid solution to flow out through the tubing and thus be sampled.

[0004] In the above technical solution, the pressure inside the solution chamber is changed by an air pump to discharge hydrofluoric acid from the conduit for sampling. However, when a large amount of hydrofluoric acid needs to be sampled, hydrofluoric acid will produce hydrofluoric acid vapor. Hydrofluoric acid vapor can cause severe chemical burns to sampling personnel, and inhalation may cause serious health hazards to the human body. At the same time, the release of hydrofluoric acid vapor will pollute the surrounding environment, thereby reducing the safety of hydrofluoric acid sampling. Therefore, a hydrofluoric acid sampling device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a hydrofluoric acid sampling device, which aims to improve the problem that existing hydrofluoric acid sampling devices cannot treat the hydrofluoric acid vapor generated during hydrofluoric acid sampling, resulting in the hydrofluoric acid vapor causing harm to sampling personnel and the surrounding environment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hydrofluoric acid sampling device, comprising a sampling housing, a sealing cap threadedly connected to the top of the sampling housing, a sampling structure provided on the surface of the sampling housing, the sampling structure including a sampling tube, a sampling pump provided on the surface of the sampling tube, a threaded cap threadedly connected to the port of the sampling tube, a separation component provided inside the sampling housing, and a neutralization component provided inside the sampling housing.

[0007] As a further description of the above technical solution:

[0008] The outer wall of the sampling housing is provided with an embedding groove, the inner wall of the embedding groove is fixedly connected with a threaded post, and the surface of the threaded cover is provided with a threaded hole.

[0009] As a further description of the above technical solution:

[0010] The end of the sampling tube furthest from the threaded cap extends into the lower end of the sampling housing.

[0011] As a further description of the above technical solution:

[0012] The partition assembly includes a partition plate, an air inlet pipe is fixedly connected to the center of the partition plate, and a one-way valve is provided on the surface of the air inlet pipe.

[0013] As a further description of the above technical solution:

[0014] The neutralizing component includes an internal thread, the inner wall of which is threaded to a housing, the top of which has a feed inlet, the bottom of which is fixedly connected to an air pump, and the top of which is fixedly connected to a handle.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the partition plate is fixedly connected to the inner wall of the sampling shell.

[0017] As a further description of the above technical solution:

[0018] The internal thread is formed on the inner wall of the upper end of the sampling housing.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the threaded hole is threadedly connected to the outer wall of the threaded post, and the outer wall of the threaded cap is adapted to the inner wall of the embedded groove.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, hydrofluoric acid is sampled by setting up a sampling tube, a threaded cap, and a sampling pump. The sampled hydrofluoric acid is stored at the lower end of the sampling shell by the separation component and the neutralization component. At the same time, sodium hydroxide solution is used to neutralize the hydrofluoric acid vapor generated during sampling, so as to avoid the hydrofluoric acid vapor from causing harm to the human body and ensure the safety of hydrofluoric acid sampling.

[0023] 2. In this utility model, the threaded cap can be placed and fixed by setting an embedding groove, a threaded post and a threaded hole, thereby avoiding leakage of the retractable sampling tube due to vibration or movement at the connection. Attached Figure Description

[0024] Figure 1 This is a right-side cross-sectional view of the main structure of this utility model.

[0025] Figure 2 This is a left-side cross-sectional schematic diagram of the main structure of this utility model.

[0026] Figure 3 for Figure 2 Enlarged schematic diagram of region A in the middle.

[0027] Figure 4 This is a partial separation diagram of the main structure of this utility model.

[0028] Legend:

[0029] 1. Sampling housing; 2. Sealing cap; 3. Sampling tube; 4. Threaded cap; 5. Sampling pump; 6. Partition plate; 7. Air inlet pipe; 8. One-way valve; 9. Internal thread; 10. Receiving housing; 11. Feed inlet; 12. Air pump; 13. Handle; 14. Embedded groove; 15. Threaded post; 16. Threaded hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1-3This utility model provides an embodiment of a hydrofluoric acid sampling device, including a sampling housing 1, a sealing cap 2 threadedly connected to the top of the sampling housing 1, a sampling structure provided on the surface of the sampling housing 1, the sampling structure including a sampling tube 3, the end of the sampling tube 3 away from the sampling housing 1 being retractable, a sampling pump 5 provided on the surface of the sampling tube 3, the sampling pump 5 can be a fluoroplastic magnetic pump or a fluoroplastic centrifugal pump. Hydrofluoric acid is a highly corrosive chemical substance that can react with most metals to generate hydrogen gas and cause an explosion. Therefore, fluoroplastic magnetic pumps and fluoroplastic centrifugal pumps are suitable pumps for hydrofluoric acid sampling. A threaded cap 4 is threadedly connected to the port of the sampling tube 3. A separation component and a neutralization component are provided inside the sampling housing 1.

[0032] Reference Figures 2-4 The sampling tube 3 extends from the end furthest from the threaded cap 4 into the lower end of the sampling housing 1. The separating component includes a partition plate 6, the outer wall of which is fixedly connected to the inner wall of the sampling housing 1. An air inlet pipe 7 is fixedly connected to the center of the partition plate 6. A one-way valve 8 is provided on the surface of the air inlet pipe 7. The one-way valve 8 ensures that the air inlet pipe 7 can only transmit the steam generated at the lower end of the sampling housing 1 to the area above the partition plate 6, and cannot transmit the air or steam above the partition plate 6 to the lower end of the sampling housing 1. The neutralization component includes an internal thread 9, which is formed in... On the inner wall of the upper end of the sampling housing 1, the inner wall of the internal thread 9 is threaded to the receiving housing 10. The interior of the receiving housing 10 is convenient for containing sodium hydroxide solution. The top of the receiving housing 10 is provided with a feed port 11, and the top of the feed port 11 is provided with a sealing cover to seal the feed port 11. The feed port 11 is convenient for adding sodium hydroxide solution. The bottom of the receiving housing 10 is fixedly connected to an air pump 12, and the top of the receiving housing 10 is fixedly connected to a handle 13. The handle 13 is convenient for the operator to hold and drive the receiving housing 10 to rotate forward or backward.

[0033] Reference Figure 3 The outer wall of the sampling housing 1 is provided with an embedding groove 14, and the inner wall of the embedding groove 14 is fixedly connected with a threaded post 15. The surface of the threaded cover 4 is provided with a threaded hole 16, and the inner wall of the threaded hole 16 is threadedly connected to the outer wall of the threaded post 15. The outer wall of the threaded cover 4 is adapted to the inner wall of the embedding groove 14. The embedding groove 14 can place the threaded cover 4, thereby fixing the sampling tube 3 of the telescopic part.

[0034] Working principle: Sodium hydroxide solution is introduced into the receiving shell 10 through the inlet 11, and then the inlet 11 is sealed with a sealing cap. The operator holds the handle 13 and inserts the receiving shell 10 into the sampling shell 1, then rotates it clockwise until the external thread and internal thread 9 on the outer wall of the receiving shell 10 are connected. After fixing the receiving shell 10 inside the sampling shell 1, the sampling shell 1 is placed on the side of the storage tank containing hydrofluoric acid. The threaded cap 4 is reversed to remove the seal on the sampling tube 3, and the sampling tube 3 is inserted into the discharge pipe of the storage tank. The sampling pump 5 is started to transfer hydrofluoric acid to the cavity at the lower end of the sampling shell 1. After sampling is completed, the threaded cap 4 seals the sampling tube 3, and then the sampling tube 3 is pulled. Some of the hydrofluoric acid remaining inside the sampling tube 3 will flow into the sampling shell 1. The sampling pump 5 is turned off, the threaded cap 4 is inserted into the embedding groove 14, and then the threaded cap 4 is rotated. The sampling process continues until the threaded hole 16 connects with the threaded post 15. When hydrofluoric acid enters the sampling housing 1, hydrogen fluoride gas will evaporate from the solution, forming hydrofluoric acid vapor. The hydrofluoric acid vapor enters the upper space of the partition plate 6 through the air inlet pipe 7. At this time, the air pump 12 has been turned on. The air pump 12 draws the hydrofluoric acid vapor into the housing 10 and discharges it into the housing 10. The hydrofluoric acid vapor is neutralized with the sodium hydroxide solution to eliminate the hazards caused by the hydrofluoric acid vapor. When the sampled hydrofluoric acid needs to be used, the threaded cap 4 is removed from the embedded groove 14 and removed from the sampling tube 3. The sampling pump 5 discharges the hydrofluoric acid from the sampling housing 1 for processing or use. Finally, the sealing cap 2 is removed, and the housing 10 is separated from the internal thread 9 by the handle 13 and overflows from the sampling housing 1. Finally, the neutralized sodium fluoride and water inside the housing 10 are cleaned to ensure the safety of hydrofluoric acid sampling.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrofluoric acid sampling device, comprising a sampling housing (1), wherein a sealing cap (2) is threadedly connected to the top of the sampling housing (1), characterized in that: The sampling housing (1) has a sampling structure on its surface, which includes a sampling tube (3). The sampling tube (3) has a sampling pump (5) on its surface. The port of the sampling tube (3) is threadedly connected to a threaded cap (4). The sampling housing (1) has a separation component inside and a neutralization component inside.

2. The hydrofluoric acid sampling device according to claim 1, characterized in that: The outer wall of the sampling housing (1) is provided with an embedding groove (14), the inner wall of the embedding groove (14) is fixedly connected with a threaded column (15), and the surface of the threaded cover (4) is provided with a threaded hole (16).

3. The hydrofluoric acid sampling device according to claim 1, characterized in that: The end of the sampling tube (3) away from the threaded cap (4) extends into the lower end of the sampling housing (1).

4. The hydrofluoric acid sampling device according to claim 1, characterized in that: The partition assembly includes a partition plate (6), an air inlet pipe (7) is fixedly connected to the center of the partition plate (6), and a one-way valve (8) is provided on the surface of the air inlet pipe (7).

5. A hydrofluoric acid sampling device according to claim 1, characterized in that: The neutralizing component includes an internal thread (9), the inner wall of which is threaded to a housing (10), the top of which has a feed inlet (11), the bottom of which is fixedly connected to an air pump (12), and the top of which is fixedly connected to a handle (13).

6. A hydrofluoric acid sampling device according to claim 4, characterized in that: The outer wall of the partition plate (6) is fixedly connected to the inner wall of the sampling housing (1).

7. A hydrofluoric acid sampling device according to claim 5, characterized in that: The internal thread (9) is formed on the inner wall of the upper end of the sampling housing (1).

8. A hydrofluoric acid sampling device according to claim 2, characterized in that: The inner wall of the threaded hole (16) is threadedly connected to the outer wall of the threaded post (15), and the outer wall of the threaded cover (4) is adapted to the inner wall of the embedded groove (14).

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