Detection device for fire assaying method

Abstract

The utility model provides a detection device for a fire assaying method. The detection device comprises a cup body, a cup cover and a condensation reflux device, the cup body is provided with an internal space and an open cup opening; the cup cover is arranged at the cup opening, and a first communicating pipe communicated with the inner space of the cup body is arranged on the cup cover; the condensation reflux device is communicated with the first communicating pipe and is used for cooling gas generated in the detection process of the fire assaying method. The detection device for the fire assaying method not only can reduce the emission of harmful gas and waste liquid, but also is beneficial to saving the consumption of nitric acid.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to a detection device for the fire assay method. Background Art

[0002] In the jewelry detection industry, to determine the gold content in gold jewelry and gold products with a gold content below 999.5‰, the cupellation method, also known as the fire assay method, is usually adopted, which is the internationally recognized standard test method for determining the gold content. The specific steps of the fire assay method include: placing the sample to be detected containing gold and silver into a gold separation basket, and then placing the gold separation basket into a beaker containing a certain concentration of nitric acid solution. After heating, the silver in the sample to be detected reacts with nitric acid to generate silver nitrate and nitrogen oxides, etc., and then the gold content can be obtained.

[0003] As described above, the device mainly used in the existing technology for the fire assay method is a beaker, and a large amount of harmful gases such as nitrogen oxides generated during the detection process are directly discharged to the outside; at the same time, the nitric acid solution used for detection is used once, resulting in a large amount of acidic waste liquid. Summary of the Utility Model

[0004] One main object of the utility model is to provide a detection device for the fire assay method, which can reduce the emission of harmful gases and waste liquid.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, a detection device for the fire assay method includes:

[0007] A cup body, having an internal space and an open cup mouth;

[0008] A cup cover, covering the cup mouth, and a first connecting pipe communicating with the internal space of the cup body is provided on the cup cover; and

[0009] A condensation and reflux device, connected to the first connecting pipe, for cooling NO and NO₂ gases generated during the detection process of the fire assay method.

[0010] According to an embodiment of the utility model, the condensation and reflux device includes:

[0011] An outer pipe, having a sealed chamber, a water inlet and a water return port communicating with the sealed chamber, and a connecting pipe extending downward from the bottom end of the sealed chamber, wherein the connecting pipe is connected to the first connecting pipe of the cup cover;

[0012] An inner pipe, disposed in the sealed chamber of the outer pipe, and the lower end of the inner pipe extends downward and is exposed in the sealed chamber to communicate with the internal space of the cup body, and the upper end of the inner pipe extends upward and is exposed in the sealed chamber;

[0013] An inlet pipe, connected to the water inlet; and

[0014] A return pipe, connected to the water return port.

[0015] According to an embodiment of the present utility model, the condensation and reflux device further includes:

[0016] A liquid storage barrel for containing a coolant;

[0017] A water pump placed in the liquid storage barrel, and the inlet pipe is connected to the water pump.

[0018] According to an embodiment of the present utility model, the outer tube further includes an extension tube that extends upward from the top end of the sealed chamber, and the condensation and reflux device further includes a plug that can be fitted at the opening of the extension tube.

[0019] According to an embodiment of the present utility model, the cup cover is further provided with a second communication pipe communicating with the inner space of the cup body, and a plug that can be fitted at the opening of the second communication pipe.

[0020] According to an embodiment of the present utility model, a first flange extending radially outward is provided at the cup mouth of the cup body, and / or a second flange extending radially outward is provided at the lower end of the cup cover.

[0021] According to an embodiment of the present utility model, a first flange extending radially outward is provided at the cup mouth of the cup body, a second flange extending radially outward is provided at the lower end of the cup cover, the second flange is vertically aligned with the first flange, and the detection device further includes a plurality of clips that are clamped between the second flange and the first flange, thereby connecting the cup cover and the cup body together.

[0022] According to an embodiment of the present utility model, a sealing ring is provided on the surface of the first flange facing the second flange; or a sealing ring is provided on the surface of the second flange facing the first flange.

[0023] According to an embodiment of the present utility model, the cup cover is in an arched or conical shape; and / or the inner tube is a spiral tube.

[0024] According to an embodiment of the present utility model, the cup cover and / or the cup body and / or the inner tube and / or the outer tube are made of glass.

[0025] The present utility model has the following advantages or beneficial effects:

[0026] The detection device for the fire assay method of the present utility model consists of a cup body and a cup cover to form a relatively airtight container. The detection device is also provided with a condensation reflux device communicating with the internal space of the cup body. During the detection process of the fire assay method, nitric acid reacts with silver under heating conditions, generating a large amount of harmful NO gas. The NO gas undergoes an oxidation reaction when it encounters oxygen in the cup body, generating reddish-brown NO2 gas. The NO2 gas rises to the condensation reflux device and becomes liquid after condensation and then flows back into the cup body. Therefore, by using the detection device for the fire assay method of the present utility model, the emission of harmful gases such as nitrogen oxides can be effectively reduced.

[0027] Meanwhile, after the nitric acid solution reacts with silver, the acidity of the nitric acid solution decreases. At this time, the liquid nitrogen oxide NO2 flowing back into the cup body reacts with water to generate hydrogen ions and nitrate ions, thereby effectively enhancing the acidity of the nitric acid solution and enabling the nitric acid solution to be recycled. This not only helps to reduce the emission of waste acid solution but also saves the consumption of nitric acid in the fire assay method, achieving the effects of energy conservation, emission reduction, and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present utility model will become more apparent.

[0029] Figure 1 FIG. is a schematic structural diagram of the first embodiment of the detection device for the fire assay method of the present utility model.

[0030] Figure 2 FIG. is a schematic structural diagram of the second embodiment of the detection device for the fire assay method of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0032] Embodiment 1

[0033] As Figure 1 shown, the first embodiment of the detection device for the fire assay method of the present utility model includes a cup body 1, a cup cover 2, and a condensation reflux device 3. Among them, both the cup body 1 and the cup cover 2 can be made of glass.

[0034] The cup body 1 has an internal space 10 and an open cup mouth. The internal space 10 of the cup body 1 can hold a reaction solution such as nitric acid solution. A first flange 11 extending radially outward is provided at the cup mouth of the cup body 1.

[0035] The cup cover 2 is covered on the cup mouth. The cup cover 2 is in an arched or spherical shape, etc. A second flange 23 extending radially outward is provided at the lower end of the cup cover 2. The second flange 23 is vertically aligned with the first flange 11.

[0036] For example, the detection device of the present utility model further includes a plurality of clips (not shown in the figure). The plurality of clips are clamped on the second flange 23 and the first flange 11, so as to connect the cup cover 2 and the cup body 1 together.

[0037] Furthermore, a sealing ring can be provided between the first flange 11 and the second flange 23. For example, a sealing ring is provided on the surface of the first flange 11 facing the second flange 23; or a sealing ring is provided on the surface of the second flange 23 facing the first flange 11. Among the first flange 11 and the second flange 23, an annular groove can also be further provided on the one without the sealing ring, and the annular groove can be used to accommodate part of the sealing ring.

[0038] Of course, the above use of clips and flanges is only an example of connecting the cup cover 2 and the cup body 1 together. In some other embodiments, the cup cover 2 and the cup body 1 can also be connected together by other convenient detachable connection methods, such as snap connection, etc.; or when the weight of the cup cover 2 is heavy enough, it can also be directly covered on the cup mouth of the cup body 1 without further setting a connection structure.

[0039] A first communication pipe 21 is provided on the cup cover 2. The first communication pipe 21 can be located at the central position of the cup cover 2. The first communication pipe 21 is communicated with the internal space 10 of the cup body 1.

[0040] Optionally, a second communication pipe 22 is further provided on the cup cover 2. The second communication pipe 22 can be located at a position close to the edge of the cup cover 2. The second communication pipe 22 can be used to install a sensor, etc. For example, a thermometer 6 can be installed. The thermometer 6 can be inserted into the second communication pipe 22 and extend downward into the internal space 10 of the cup body 1 to measure the temperature of the reaction solution in the cup body 1.

[0041] In some embodiments, a plug 25 can also be provided at the opening of the second communication pipe 22 to prevent or minimize the overflow of reaction gas from the second communication pipe 22. In the case of having the plug 25, the thermometer 6 can be inserted into the hole of the plug 25.

[0042] The condensation reflux device 3 in the present utility model is connected to the first connecting pipe 21 of the cup lid 2. The function of the condensation reflux device 3 is to cool the reaction gas generated during the detection process of the fire assay method, such as nitrogen oxide gas, and condense the reaction gas into a liquid state and reflux it into the cup body 1.

[0043] The specific structure of the condensation reflux device 3 can be various. For example, the condensation reflux device 3 includes an outer pipe 31, an inner pipe 32, a water inlet pipe 33, and a water return pipe 34. Among them, both the outer pipe 31 and the inner pipe 32 can be made of glass, and the water inlet pipe 33 and the water return pipe 34 can be made of flexible materials.

[0044] The outer pipe 31 has a closed chamber 30, a water inlet 311, a water return port 312, and a connecting pipe 313. The water inlet 311 and the water return port 312 are respectively connected to the lower end and the upper end of the closed chamber 30, and the connecting pipe 313 extends downward from the bottom end of the closed chamber 30. The connecting pipe 313 is inserted and connected to the first connecting pipe 21 of the cup lid 2 and is communicated with the internal space 10 of the cup body 1.

[0045] In some embodiments, the outer pipe 31 further includes an extension pipe 37, which extends upward from the top end of the closed chamber 30, and the condensation reflux device 3 further includes a plug 38 that can cooperate with the extension pipe 37. When the detection device for the fire assay method in the present utility model is not in use, the plug 38 can be fitted to the opening of the extension pipe 37 of the condensation reflux device 3.

[0046] The inner pipe 32 is fixed in the closed chamber 30 of the outer pipe 31, and the lower end of the inner pipe 32 extends downward and is exposed to the closed chamber 30, so that the inner pipe 32 is communicated with the internal space 10 of the cup body 1, and the upper end of the inner pipe 32 extends upward and is exposed to the closed chamber 30. The inner pipe 32 can be a spiral pipe to increase the condensation path and improve the cooling efficiency. In some other embodiments, the inner pipe 32 can also be other shapes such as a series of spherical pipes connected in series. The water inlet pipe 33 can be a flexible pipe such as a rubber pipe, etc., and the water inlet pipe 33 is connected to the water inlet 311.

[0047] The water return pipe 34 can be a flexible pipe such as a rubber pipe, etc., and the water return pipe 34 is connected to the water return port 312.

[0048] During use, the water inlet pipe 33 can be connected to the faucet of the municipal pipe network, and the water return pipe 34 can directly discharge the coolant into the sewer, etc.

[0049] In some embodiments, in order to realize the recycling of the coolant, the condensation reflux device 3 further includes a liquid storage bucket 35 and a water pump 36. The liquid storage bucket 35 is used to hold the coolant, and the volume of the liquid storage bucket 35 can be determined according to actual needs; the water pump 36 is connected to the water inlet pipe 33, and the end of the water return pipe 34 is immersed in the coolant of the liquid storage bucket 35.

[0050] The circulation path of the coolant in the liquid storage barrel 35 is as follows: The coolant is pumped into the water inlet pipe 33 by the water pump 36, then enters the sealed chamber 30 of the outer pipe 31, and then returns to the liquid storage barrel 35 through the water return pipe 34 to complete one cycle.

[0051] During use, start the water pump 36, and the coolant in the liquid storage barrel 35 enters the sealed chamber 30 of the outer pipe 31 through the water inlet pipe 33; place the sample to be tested containing gold and silver in the gold parting basket, and then place the gold parting basket into the cup body 1 containing nitric acid solution. After heating, silver in the sample to be tested reacts with nitric acid to generate silver nitrate and reaction gas such as NO. The NO gas undergoes an oxidation reaction when it encounters oxygen in the cup body, generating red-brown NO2 gas. The NO2 gas enters the inner pipe 32 of the condensation and reflux device 3 through the first communication pipe 21 in the center of the cup cover 2. In the sealed chamber 30 of the outer pipe 31, after the reaction gas in the inner pipe 32 undergoes sufficient heat exchange with the coolant, the coolant returns to the liquid storage barrel 35 through the water return pipe 34; at the same time, the temperature of the reaction gas in the inner pipe 32 decreases and becomes liquid NO2, which refluxes into the cup body 1 and mixes with the reaction solution, that is, the nitric acid solution.

[0052] The detection device for the fire assay method of the present utility model consists of a cup body 1 and a cup cover 2 to form a relatively sealed container. The detection device is also provided with a condensation and reflux device 3 communicated with the internal space 10 of the cup body 1. During the detection process of the fire assay method, nitric acid reacts with silver under heating conditions to generate a large amount of NO gas. The NO gas undergoes an oxidation reaction when it encounters oxygen in the cup body, generating red-brown NO2 gas. The NO2 gas can rise along the inner pipe 32 and become liquid NO2 after condensation and reflux into the cup body 1. Therefore, when using the detection device for the fire assay method of the present utility model, the emission of harmful gases such as nitrogen oxides can be effectively reduced; at the same time, after the nitric acid solution reacts with silver, the acidity of the nitric acid solution decreases. At this time, the liquid NO2 refluxing into the cup body reacts with water to generate hydrogen ions and nitrate ions, which can effectively enhance the acidity of the nitric acid solution and enable the nitric acid solution to be recycled. This not only helps to reduce the emission of waste acid liquid but also saves the consumption of nitric acid in the fire assay method, achieving the effects of energy conservation, emission reduction, and environmental protection.

[0053] Embodiment 2

[0054] As Figure 2 shown, the second embodiment of the detection device for the fire assay method of the present utility model is different from the first embodiment in that: the cup cover 2 is conical. The conical cup cover 2 makes the reaction gas generated in the cup body 1 more likely to be concentrated in the first communication pipe 21 in the center of the cup cover 2, so as to enter the condensation and reflux device 3 more quickly, which is beneficial to improving the condensation efficiency.

[0055] The other structures of the second embodiment of the detection device for the fire assay method of the present utility model are basically the same as those of the first embodiment and will not be described in detail here.

[0056] It can be understood that the different structures described in the various embodiments provided by the present utility model can be combined with each other without contradiction, and no further examples will be given here.

[0057] In the application embodiments, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "a plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected to", and "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to specific circumstances.

[0058] In the description of the application embodiments, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", and "rear" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the application embodiments.

[0059] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application embodiments. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] The above are only the preferred embodiments of the application embodiments and are not used to limit the application embodiments. For those skilled in the art, the application embodiments can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A detection device for the fire assay method, characterized in that Comprising: A cup body, having an internal space and an open cup mouth; A cup cover, covering the cup mouth, and a first connecting pipe communicating with the internal space of the cup body is provided on the cup cover; And A condensation and reflux device, connected to the first connecting pipe, for cooling NO and NO2 gases generated during the detection process of the fire assay method.

2. The detection device for the fire assay method according to claim 1, wherein The condensation and reflux device includes: An outer pipe, having a sealed chamber, a water inlet and a water return port communicating with the sealed chamber, and a connecting pipe extending downward from the bottom end of the sealed chamber, wherein the connecting pipe communicates with the first connecting pipe of the cup cover; An inner pipe, disposed in the sealed chamber of the outer pipe, and the lower end of the inner pipe extends downward and is exposed in the sealed chamber to communicate with the internal space of the cup body, and the upper end of the inner pipe extends upward and is exposed in the sealed chamber; A water inlet pipe, connected to the water inlet; and A water return pipe, connected to the water return port.

3. The detection device for the fire assay method according to claim 2, characterized in that, The condensation and reflux device further includes: A liquid storage bucket, for containing a coolant; A water pump, placed in the liquid storage bucket, and the water inlet pipe is connected to the water pump.

4. The detection device for the fire assay method according to claim 2, wherein The outer pipe further includes an extension pipe, the extension pipe extends upward from the top end of the sealed chamber, and the condensation and reflux device further includes a plug that can be fitted at the opening of the extension pipe.

5. The detection device for the fire assay method according to any one of claims 1-4, characterized in that, A second connecting pipe communicating with the internal space of the cup body is further provided on the cup cover, and a plug that can be fitted at the opening of the second connecting pipe.

6. The detection device for the fire assay method according to any one of claims 1-4, characterized in that, A first flange extending radially outward is provided at the cup mouth of the cup body, and / or a second flange extending radially outward is provided at the lower end of the cup cover.

7. The detection device for the fire assay method according to claim 6, characterized in that, A first flange extending radially outward is provided at the cup mouth of the cup body, a second flange extending radially outward is provided at the lower end of the cup cover, the second flange is vertically aligned with the first flange, and the detection device further includes a plurality of clips, and the plurality of clips are clamped between the second flange and the first flange, thereby connecting the cup cover and the cup body together.

8. The detection device for the fire assay method according to claim 7, characterized in that, A sealing ring is provided on the surface of the first flange facing the second flange; or a sealing ring is provided on the surface of the second flange facing the first flange.

9. The detection device for the fire assay method according to any one of claims 2-4, characterized in that, The cup cover is arched or conical; and / or the inner pipe is a spiral pipe.

10. The detection device for the fire assay method according to any one of claims 2-4, characterized in that, The cup cover and / or the cup body and / or the inner pipe and / or the outer pipe are made of glass.

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