Hydrofluoric acid closed sampling device

Abstract

The utility model relates to the field of hydrofluoric acid, in particular to a hydrofluoric acid closed sampling device which comprises a bottle body and a sealing mechanism, and a sampling mechanism is mounted at one end of the bottle body. When the hydrofluoric acid aqueous solution in the bottle body needs to be sampled, the bolt C is screwed off and placed in the storage groove, then the handle is pulled to turn over the sealing baffle, so that the bottle body is not sealed, then the hydrofluoric acid aqueous solution in the bottle body can be sampled through the sampling mechanism, and when the sealing baffle is opened and the bottle body is not sealed, the sampling mechanism is used for sampling the hydrofluoric acid aqueous solution in the bottle body. Acid gas volatilized by the hydrofluoric acid aqueous solution can be adsorbed through the acid gas adsorbent, and then pungent smell in the volatilized gas is adsorbed through the activated carbon filter layer, so that the influence of volatilization of the hydrofluoric acid aqueous solution on sampling personnel during sampling can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of hydrofluoric acid, in particular to a closed sampling device for hydrofluoric acid. Background Art

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming corrosive liquid with a strong pungent odor. Hydrofluoric acid is a weak acid with extremely strong corrosiveness and can strongly corrode metals, glass and silicon-containing objects. Inhaling the vapor or contacting the skin will cause incurable burns.

[0003] When the container is sealed, if it is necessary to sample the hydrofluoric acid liquid inside the container, it is necessary to increase the pressure inside the container or open the container so that the liquid inside the container can be sampled. Once the sealed container is opened, after the liquid inside the container volatilizes, the volatilized acid gas is easily inhaled by the sampling personnel, and the volatilized acid gas has a certain pungent odor. And sampling the liquid by increasing the pressure is likely to make it difficult to control the sampling amount when sampling the liquid. Content of the Utility Model

[0004] The purpose of the utility model is to provide a closed sampling device for hydrofluoric acid to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A closed sampling device for hydrofluoric acid includes a bottle body, a sampling mechanism is installed at one end of the bottle body, and a sealing mechanism is also included;

[0007] The sealing mechanism includes a top cover. A plurality of bolts B are evenly distributed on the outer circle of the top cover. A liquid inlet pipe is fixed to the upper end of the top cover. A valve body is installed in the middle of the liquid inlet pipe. A sealing baffle is rotatably connected to the middle of the top cover. One end of the sealing baffle is provided with a bolt C, and a threaded hole is opened at the position of the top cover corresponding to the bolt C. A handle is fixed to the upper end of the sealing baffle. A storage groove is opened on the upper end surface of the top cover and in front of the sealing baffle. A filter frame is fixed to the lower end of the top cover. An acid gas adsorbent is installed at the bottom layer of the filter frame, and an activated carbon filter layer is installed at the upper layer of the filter frame.

[0008] Preferably: Rubber layers are provided on the outer circle of the lower end of the top cover and the upper end of the bottle body, and threaded holes are opened at the positions of the bottle body corresponding to the bolts B.

[0009] Preferably: Rubber layers are provided on the lower end surface of the sealing baffle and the position of the top cover corresponding to the sealing baffle.

[0010] Preferably: A transparent plate is fixed to the front wall of the bottle body. The transparent plate is made of a transparent material, and scale marks are opened at the front end of the transparent plate.

[0011] Preferably, the sampling mechanism includes a transfer pipe, which is fixed to the bottom on one side of the bottle body. A liquid extraction pipe is fixed to the input end of the transfer pipe. A sealing block is arranged inside the transfer pipe. A pull pipe is fixed to the rear end of the sealing block. A plug block is arranged at the output port of the pull pipe. A pull ring is fixed to one end of the plug block. A blocking frame is slidably connected to the transfer pipe along the up-and-down direction corresponding to the liquid extraction pipe.

[0012] Preferably, scale marks are provided on the outer wall of the front end of the transfer pipe.

[0013] The beneficial effects compared with the prior art are as follows:

[0014] When it is necessary to sample the hydrofluoric acid aqueous solution inside the bottle body, first unscrew bolt C and place it in the storage groove, and then pull the handle to open the sealing baffle, so that the bottle body is unsealed. Subsequently, the sampling mechanism can be used to sample the hydrofluoric acid aqueous solution inside the bottle body. When the sealing baffle is opened and the bottle body is unsealed, the acid gas adsorbent can adsorb the acid gas volatilized from the hydrofluoric acid aqueous solution, and then the activated carbon filter layer adsorbs the pungent odor in the volatilized gas. In this way, the influence of the volatilization of the hydrofluoric acid aqueous solution during sampling on the sampling personnel can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic structural diagram of a hydrofluoric acid airtight sampling device according to the present invention;

[0017] Figure 2 is a schematic structural diagram of the bottle body of a hydrofluoric acid airtight sampling device according to the present invention;

[0018] Figure 3 is a main sectional view of the bottle body of a hydrofluoric acid airtight sampling device according to the present invention;

[0019] Figure 4 is a schematic structural diagram of the sealing mechanism of a hydrofluoric acid airtight sampling device according to the present invention;

[0020] Figure 5 is a main sectional view of the sealing mechanism of a hydrofluoric acid airtight sampling device according to the present invention.

[0021] The description of the reference numerals is as follows:

[0022] 1. Bottle body; 11. Transparent plate; 12. Mounting block; 13. Pull handle; 14. Bolt A; 2. Transfer pipe; 21. Liquid extraction pipe; 22. Sealing block; 23. Pull pipe; 24. Plug block; 25. Pull ring; 26. Bracket; 3. Top cover; 31. Bolt B; 32. Liquid inlet pipe; 33. Valve body; 34. Sealing baffle; 35. Bolt C; 36. Handle; 37. Storage slot; 38. Filter frame; 39. Acid gas adsorbent; 310. Activated carbon filter layer. Detailed implementation manners

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mount", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] The present invention will be further described below with reference to the drawings:

[0026] As Figures 1 - 5 shown, a hydrofluoric acid closed sampling device includes a bottle body 1, a sampling mechanism is installed at one end of the bottle body 1, and a sealing mechanism is further included.

[0027] A transparent plate 11 is fixed to the front wall of the bottle body 1. The transparent plate 11 is made of a transparent material, and a scale marking is provided at the front end of the transparent plate 11. Installation blocks 12 are provided at both ends of the bottle body 1, and a pull handle 13 is provided at the upper end of the installation block 12. Two bolts A14 are provided at both ends of the pull handle 13, and the pull handle 13 is fixed to the installation block 12 through the bolts A14; through the transparent plate 11 and the scale provided at its front end, the capacity of the hydrofluoric acid aqueous solution inside the bottle body 1 can be observed.

[0028] The sampling mechanism includes a transfer pipe 2. The transfer pipe 2 is fixed to the bottom on one side of the bottle body 1. Scale markings are provided on the outer wall of the front end of the transfer pipe 2. A liquid suction pipe 21 is fixed to the input end of the transfer pipe 2. A sealing block 22 is provided inside the transfer pipe 2. A pull pipe 23 is fixed to the rear end of the sealing block 22. A plug block 24 is provided at the output port of the pull pipe 23. A pull ring 25 is fixed to one end of the plug block 24. A retaining frame 26 is slidably connected to the transfer pipe 2 along the up and down direction corresponding to the liquid suction pipe 21; by slowly pulling the pull pipe 23, the hydrofluoric acid aqueous solution in the bottle body 1 can be drawn into the transfer pipe 2, and then the pull ring 25 is pulled to pull out the plug block 24 and the device is set at a certain inclination, so that the hydrofluoric acid aqueous solution can flow out, so as to perform sampling processing on the hydrofluoric acid aqueous solution.

[0029] The sealing mechanism includes a top cover 3. A plurality of bolts B31 are evenly distributed on the outer ring of the top cover 3. Rubber layers are provided on the outer ring of the lower end of the top cover 3 and the upper end of the bottle body 1, and threaded holes are provided in the bottle body 1 corresponding to the bolts B31. A liquid inlet pipe 32 is fixed to the upper end of the top cover 3. A valve body 33 is installed in the middle of the liquid inlet pipe 32. A sealing baffle 34 is rotatably connected to the middle of the top cover 3. Rubber layers are provided on the lower end surface of the sealing baffle 34 and the position of the top cover 3 corresponding to the sealing baffle 34. A bolt C35 is provided at one end of the sealing baffle 34, and a threaded hole is provided in the top cover 3 corresponding to the bolt C35. A handle 36 is fixed to the upper end of the sealing baffle 34. A storage groove 37 is provided on the upper end surface of the top cover 3 and in front of the sealing baffle 34. A filter frame 38 is fixed to the lower end of the top cover 3. An acid gas adsorbent 39 is installed at the bottom layer of the filter frame 38, and an activated carbon filter layer 310 is installed at the upper layer of the filter frame 38; when sampling the hydrofluoric acid aqueous solution inside the bottle body 1 is required, first unscrew the bolt C35 and place it in the storage groove 37, and then pull the handle 36 to open the sealing baffle 34, so that the bottle body 1 is unsealed, and then the sampling mechanism can be used to sample the hydrofluoric acid aqueous solution inside the bottle body 1. When the sealing baffle 34 is opened to unseal the bottle body 1, the acid gas adsorbent 39 can adsorb the acid gas volatilized from the hydrofluoric acid aqueous solution, and then the activated carbon filter layer 310 adsorbs the pungent smell in the volatilized gas, so as to reduce the impact on the sampling personnel caused by the volatilization of the hydrofluoric acid aqueous solution during sampling.

[0030] Working principle: Before using the device, the valve body 33 can be opened, and then the hydrofluoric acid aqueous solution is injected into the bottle body 1 through the liquid inlet pipe 32. When it is necessary to sample the hydrofluoric acid aqueous solution inside the bottle body 1, first unscrew the bolt C35 and place it in the storage groove 37, and then pull the handle 36 to open the sealing baffle 34, so that the bottle body 1 is unsealed. Then, the sampling mechanism can be used to sample the hydrofluoric acid aqueous solution inside the bottle body 1. When the sealing baffle 34 is opened to unseal the bottle body 1, the acid gas adsorbent 39 can adsorb the acid gas volatilized from the hydrofluoric acid aqueous solution, and then the activated carbon filter layer 310 adsorbs the pungent odor in the volatilized gas. In this way, it can be avoided that the volatilization of the hydrofluoric acid aqueous solution during sampling affects the sampling personnel. Then, by slowly pulling the pull tube 23, the hydrofluoric acid aqueous solution in the bottle body 1 can be drawn into the transfer tube 2. Then, pull the pull ring 25 to pull out the plug 24 and tilt the device at a certain angle, so that the hydrofluoric acid aqueous solution can flow out, and thus the hydrofluoric acid aqueous solution is sampled.

[0031] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A closed sampling device for hydrofluoric acid, comprising a bottle body (1), wherein a sampling mechanism is installed at one end of the bottle body (1), characterized in that: Also includes a sealing mechanism; The sealing mechanism comprises a top cover (3), the outer ring of which is evenly distributed with a plurality of bolts B (31), the upper end of which is fixed with a liquid inlet pipe (32), the middle of which is provided with a valve body (33), the middle of which is rotatably connected with a sealing baffle (34), one end of which is provided with a bolt C (35), and the top cover (3) is provided with a threaded hole at a position corresponding to the bolt C (35), the upper end of which is fixed with a handle (36), the upper end surface of which is provided with a storage groove (37) in front of the sealing baffle (34), the lower end of which is fixed with a filter frame (38), the bottom layer of which is provided with an acid gas adsorbent (39), and the upper layer of which is provided with an activated carbon filter layer (310).

2. A hydrofluoric acid sealed sampling device according to claim 1, characterized in that: The outer ring of the lower end of the top cover (3) and the upper end of the bottle body (1) are both provided with a rubber layer, and the bottle body (1) is provided with a threaded hole at a position corresponding to the bolt B (31).

3. A hydrofluoric acid sealed sampling device according to claim 1, characterized in that: The lower end surface of the sealing baffle (34) and the position of the top cover (3) corresponding to the sealing baffle (34) are both provided with a rubber layer.

4. A hydrofluoric acid sealed sampling device according to claim 1, characterized in that: A transparent plate (11) is fixed to the front end wall of the bottle body (1); the transparent plate (11) is made of a transparent material, and a scale mark is provided at the front end of the transparent plate (11).

5. A hydrofluoric acid sealed sampling device according to claim 1, characterized in that: The sampling mechanism comprises a transfer tube (2), wherein the transfer tube (2) is fixed to the bottom of one side of the bottle body (1), a liquid extraction tube (21) is fixed to the input end of the transfer tube (2), a sealing block (22) is arranged inside the transfer tube (2), a pull tube (23) is fixed to the rear end of the sealing block (22), a plug block (24) is arranged at the output port of the pull tube (23), a pull ring (25) is fixed to one end of the plug block (24), and a retaining frame (26) is slidably connected to the transfer tube (2) in the up-down direction corresponding to the liquid extraction tube (21).

6. A hydrofluoric acid sealed sampling device according to claim 5, characterized in that: The outer wall of the front end of the transfer tube (2) is provided with scale markings.

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