An instrument for digesting total phosphorus and total nitrogen in water samples

Abstract

This utility model discloses an instrument for digesting total phosphorus and total nitrogen in water samples, comprising a housing. The upper and lower ends of the housing are respectively provided with an upper connecting hole and a lower connecting hole. An upper connecting component is connected to the upper connecting hole, and a water inlet component is connected to the upper connecting component. A lower connecting hole is connected to a lower connecting component, and a water outlet component is connected to the lower connecting component. A digester is disposed in the housing. The upper end of the digester is connected to the water inlet component through the upper connecting component, and the lower end of the digester is connected to the water outlet component through the lower connecting component.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to an instrument for digesting total phosphorus and total nitrogen in water samples. Background Technology

[0002] In environmental monitoring and water quality analysis, total phosphorus and total nitrogen are important indicators for measuring the eutrophication level of water bodies. "Water sample digestion" is a key pretreatment step before measuring these two indicators, and its purpose is to transform the complex pollutants in the water sample into simple, measurable forms.

[0003] When both total phosphorus and total nitrogen require digestion and testing, there are generally two methods: one is to digest total phosphorus and total nitrogen separately, meaning the digestion processes are carried out independently in separate digestion devices; the other is combined digestion, where the acid-base environment during digestion is controlled by adjusting the amount of reagents added, allowing for a single combined digestion of the water sample before testing total nitrogen and total phosphorus separately. For some small and medium-sized laboratories, using two digestion devices when both total phosphorus and total nitrogen require digestion and testing is costly, and they often lack suitable combined digestion equipment. Utility Model Content

[0004] The purpose of this invention is to provide an instrument for digesting total phosphorus and total nitrogen in water samples, so as to solve the existing problems of how to achieve total phosphorus and total nitrogen. The specific technical solution is as follows:

[0005] An instrument for digesting total phosphorus and total nitrogen in water samples includes a housing. An upper connecting hole and a lower connecting hole are respectively provided at the upper and lower ends of the housing. An upper connecting component is connected to the upper connecting hole, and a water inlet component is connected to the upper connecting component. A lower connecting hole is connected to a lower connecting component, and a water outlet component is connected to the lower connecting component. A digester is disposed within the housing. The upper end of the digester is connected to the water inlet component via the upper connecting component, and the lower end of the digester is connected to the water outlet component via the lower connecting component.

[0006] Preferably, the digester includes a heating element and a digestion tube;

[0007] The heating component includes a temperature control assembly and a heating tube. Multiple heating rings are connected to the heating tube, and the multiple heating rings are connected to a heating column, which is connected to the temperature control assembly.

[0008] The digestion tube includes a first digestion tube, with a second digestion tube connected to each end of the first digestion tube. A first thread is formed on the outer wall of the end of the first digestion tube, and the first digestion tube is sleeved inside the heating tube.

[0009] Preferably, the upper connecting component includes an upper threaded connector and a first upper pressure block connected to the upper threaded connector. A second upper pressure block is connected to the first upper pressure block. The upper threaded connector, the first upper pressure block, and the second upper pressure block are provided with interconnected first upper connecting holes. A second upper connecting hole is provided at the end of the upper threaded connector. The second upper connecting hole communicates with the first upper connecting hole. A second thread is formed on the wall of the second upper connecting hole.

[0010] Preferably, the water inlet component includes a water inlet pipe and a first connecting pipe connected to the water inlet pipe, wherein a third thread is formed on the outer wall of the other end of the first connecting pipe, and a control valve is connected to the water inlet pipe.

[0011] Preferably, a sealing ring is provided between the upper connecting component and the water inlet component, and between the lower connecting component and the water outlet component.

[0012] Preferably, the housing has an installation port on its upper part, a mounting base is connected to the installation port, the temperature control component is connected to the mounting base, and a transparent glass plate is connected to the outer wall of the housing, the transparent glass plate covering the installation port.

[0013] Preferably, the lower connecting component includes a lower threaded connecting body and a first lower pressing block connected to the lower threaded connecting body. A second lower pressing block is connected to the first lower pressing block. The lower threaded connecting body, the first lower pressing block, and the second lower pressing block are provided with interconnected first lower connecting holes. A second lower connecting hole is provided at the end of the lower threaded connecting body. The second lower connecting hole communicates with the first lower connecting hole. A fourth thread is formed on the wall of the second lower connecting hole.

[0014] Preferably, the water outlet component includes a water outlet pipe and a second connecting pipe connected to the water outlet pipe, the other end of the second connecting pipe has a fifth thread formed on its outer wall, and a control valve is connected to the water outlet pipe.

[0015] Preferably, the wall of the upper connecting hole is provided with a thread that matches the upper threaded connector.

[0016] Preferably, the wall of the lower connecting hole is provided with a thread that matches the lower threaded connector.

[0017] This utility model provides a water sample digestion instrument for total phosphorus and total nitrogen. When performing combined digestion of total phosphorus and total nitrogen, an oxidant, an acid-base regulator and the water sample to be tested are added to the digester. Then, the temperature of the digester is raised and the digestion is sealed inside the digester. After digestion, the water sample can be discharged from the digester and then the total nitrogen and total phosphorus are tested separately, thus achieving a single digestion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is an exploded view of the water sample digestion instrument for total phosphorus and total nitrogen provided by this utility model;

[0020] Figure 2 This is an exploded view of the water sample digestion instrument for total phosphorus and total nitrogen provided by this utility model;

[0021] Figure 3 This is a top view of the water sample digestion instrument for total phosphorus and total nitrogen provided by this utility model;

[0022] Figure 4 yes Figure 3 A cross-sectional view along the AA direction;

[0023] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0028] like Figure 1 As shown, an instrument for digesting total phosphorus and total nitrogen in water samples includes a housing 1. The upper end and lower end of the housing 1 are respectively provided with an upper connecting hole 2 and a lower connecting hole 3. The upper connecting hole 2 is connected to an upper connecting component 4, and a water inlet component 5 is connected to the upper connecting component 4. The lower connecting hole 3 is connected to a lower connecting component 6, and a water outlet component 7 is connected to the lower connecting component 6. A digester 8 is provided in the housing 1. The upper end of the digester 8 is connected to the water inlet component 5 through the upper connecting component 4, and the lower end of the digester 8 is connected to the water outlet component 7 through the lower connecting component 6.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, the digester 8 includes a heating element 9 and a digestion tube 10; the heating element 9 includes a temperature control component 11 and a heating tube 12, a plurality of heating rings 13 are connected to the heating tube 12, the plurality of heating rings 13 are connected to a heating column 14, and the heating column 14 is connected to the temperature control component 11; the digestion tube 10 includes a first digestion tube 15, the two ends of the first digestion tube 15 are respectively connected to second digestion tubes 16, a first thread 150 is formed on the outer wall of the end of the first digestion tube 15, and the first digestion tube 15 is sleeved inside the heating tube 12.

[0030] The heating column 14 and heating ring 13 are resistance heating wires, powered by a temperature control assembly 11. The heating tube 12 is a copper tube. The temperature control assembly 11 includes a power module, a temperature sensor, and a temperature controller. The power module powers the digestion device. One end of the power module is connected to the relay input of the temperature controller, and the other end is directly connected to one end of the heating column 14; the relay output is connected to the other end of the heating column 14, forming a main circuit. The temperature sensor is connected to the signal input of the temperature controller via a three-wire or four-wire connection to eliminate the influence of wire resistance. Thus, the heating column 14, heating ring 13, and heating tube 12 can heat the digestion tube 10.

[0031] like Figure 2 As shown, the housing 1 has a mounting port 28 and a heat dissipation hole 40 on its upper surface. A mounting base 29 is connected to the mounting port 28, and the temperature control component 11 is connected to the mounting base 28. A transparent glass plate 30 is connected to the outer wall of the housing 1, and the transparent glass plate 30 covers the mounting port 28. The temperature value on the temperature control component 11 can be seen through the transparent glass plate 30.

[0032] In a preferred embodiment, the first digestion tube 15 is provided with graduations, and the heating tube 12 is provided with an opening, so that after the heating tube 12 is fitted onto the first digestion tube 15, the graduations on the first digestion tube 15 are exposed through the opening of the heating tube 12. Two detachably connected cover plates, which are made of glass, are provided at the front and rear of the housing 1, so that the graduations on the first digestion tube 15 inside the housing 1 can be seen during the digestion process.

[0033] like Figure 4 As shown, the upper connecting component 4 includes an upper threaded connector 17 and a first upper pressure block 18 connected to the upper threaded connector 17. A second upper pressure block 19 is connected to the first upper pressure block 18. The upper threaded connector 17, the first upper pressure block 18 and the second upper pressure block 19 are provided with a first upper connecting hole 20 that communicates with each other. A second upper connecting hole 21 is provided at the end of the upper threaded connector 17. The second upper connecting hole 21 communicates with the first upper connecting hole 20. A second thread 23 is formed on the hole wall of the second upper connecting hole 21.

[0034] The first upper pressure block 18, the second upper pressure block 19, and the upper threaded connector 17 are integrally formed.

[0035] The upper connecting hole 2 has a thread on its wall that matches the upper threaded connector 17. The upper threaded connector 17 is connected inside the upper connecting hole 2, and the first upper pressure block 18 and the second upper pressure block 19 are located outside the housing 1.

[0036] The first thread 150 and the second thread 23 are matched with each other. The end of the first digestion tube 15 with the first thread 150 is connected to the second upper connecting hole 21 of the upper threaded connector 17. The second upper pressure block 19 passes through the first upper pressure block 18, the second upper pressure block 19 and the first upper connecting hole 20 on the upper threaded connector 17. The diameter of the first digestion tube 15 is larger than that of the second digestion tube 16, and the heating tube 12 is sleeved on the first digestion tube 15.

[0037] The first upper connecting hole 20 on the first upper pressure block 18, the second upper pressure block 19, and the upper threaded connector 17 comprises two parts. The first part of the first upper connecting hole 20 includes a portion of the first upper connecting hole 20 on the first upper pressure block 18 and a portion of the first upper connecting hole 20 penetrating the second upper pressure block 19. The second part of the first upper connecting hole 20 includes the remaining portion of the first upper connecting hole 20 on the first upper pressure block 18 and a portion of the first upper connecting hole 20 communicating with the second upper connecting hole 21 on the upper threaded connector 17. The diameter of the first part of the first upper connecting hole 20 is larger than the diameter of the second part of the hole, and the inner wall of the first part of the first upper connecting hole 20 is provided with threads.

[0038] like Figure 4 As shown, the water inlet component 5 includes a water inlet pipe 24 and a first connecting pipe 25 connected to the water inlet pipe 24. A third thread 26 is formed on the outer wall of the other end of the first connecting pipe 25. A control valve is connected to the water inlet pipe 24. The portion of the first connecting pipe 25 with the third thread 26 is connected to a first portion of the hole in the first upper connecting hole 20. A second digestion pipe 16 at one end of the digestion pipe 10 is connected to a second portion of the hole in the first upper connecting hole 20.

[0039] A sealing ring 27 is provided between the upper connecting component 4 and the water inlet component 5, and between the lower connecting component 6 and the water outlet component 7. The sealing ring 27 between the upper connecting component 4 and the water inlet component 5 is disposed in the first part of the first upper connecting hole 20, and the end of the portion of the first connecting pipe 25 of the water inlet component 5 with the third thread 26 presses against the sealing ring 27.

[0040] like Figure 4 and Figure 5 As shown, the lower connecting component 6 includes a lower threaded connecting body 31 and a first lower pressing block 32 connected to the lower threaded connecting body 31. A second lower pressing block 33 is connected to the first lower pressing block 32. The lower threaded connecting body 31, the first lower pressing block 32 and the second lower pressing block 33 are provided with a first lower connecting hole 34 that communicates with each other. A second lower connecting hole 35 is provided at the end of the lower threaded connecting body 31. The second lower connecting hole 35 communicates with the first lower connecting hole 34. A fourth thread 36 is formed on the hole wall of the second lower connecting hole 35.

[0041] The first pressing block 32, the second pressing block 33, and the threaded connector 31 are integrally formed.

[0042] The lower connecting hole 3 has a thread on its wall that matches the lower threaded connector 31. The lower threaded connector 31 is connected inside the lower connecting hole 3. The first lower pressing block 32 and the second lower pressing block 33 are located outside the housing 1.

[0043] The first lower connecting hole 34 on the first lower pressing block 32, the second lower pressing block 33, and the lower threaded connector 31 comprises two parts. The first part of the first lower connecting hole 34 includes a portion of the first lower connecting hole 34 on the first lower pressing block 32 and a portion of the first lower connecting hole 34 penetrating the second lower pressing block 33. The second part of the first lower connecting hole 34 includes the remaining portion of the first lower connecting hole 34 on the first lower pressing block 32 and the portion of the first lower connecting hole 34 that communicates with the lower threaded connector 31 and the second lower connecting hole 35. The diameter of the first part of the first lower connecting hole 34 is larger than the diameter of the second part of the hole, and the inner wall of the first part of the first lower connecting hole 34 is provided with threads.

[0044] like Figure 4 and Figure 5 As shown, the water outlet component 7 includes a water outlet pipe 37 and a second connecting pipe 38 connected to the water outlet pipe 37. A fifth thread 39 is formed on the outer wall of the other end of the second connecting pipe 38. A control valve is connected to the water outlet pipe 37.

[0045] The portion of the second connecting pipe 38 with the fifth thread 39 is connected to the first part of the first lower connecting hole 34. The second digestion pipe 16 at the other end of the digestion pipe 10 is connected to the second part of the first lower connecting hole 34.

[0046] The sealing ring 27 between the lower connecting component 6 and the water outlet component 7 is disposed in the first part of the first lower connecting hole 34, and the end of the portion of the second connecting pipe 38 of the water outlet component 7 with the fifth thread 39 is squeezed to seal the sealing ring 27.

[0047] This invention provides an instrument for digesting total phosphorus and total nitrogen in water samples. During combined digestion, the first upper pressure block 18 of the upper connecting component 4 is twisted to remove the upper connecting component 4 from the upper connecting hole 2 of the housing 1. At this time, the water inlet pipe 24 connected to the upper connecting component 4 is removed from the housing 1 along with the upper connecting component 4, exposing the second digestion tube 16 of the digestion tube 10 in the housing 1. Then, an oxidant and an acid-base adjuster are added to the second digestion tube 16. The upper connecting component 4 is then reconnected to the upper connecting hole 2 of the housing 1, so that the water inlet pipe 24 is also reconnected to the housing 1. The water sample to be tested is then introduced, followed by heating. After digestion is completed, the digested water sample is discharged from the digester 10 through the water outlet pipe 37, and total phosphorus and total nitrogen are tested separately.

[0048] In summary, the water sample digestion instrument provided by this utility model, when performing combined digestion of total phosphorus and total nitrogen, involves adding an oxidant, an acid-base adjuster, and the water sample to be tested to the digester 8. Subsequently, the temperature of the digester 8 is increased, and the digestion is sealed inside the digester. After digestion, the water sample can be discharged from the digester 8, and then the total nitrogen and total phosphorus are tested separately, thus achieving a single digestion.

[0049] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An instrument for digesting total phosphorus and total nitrogen in water samples, characterized in that, The device includes a housing (1), with an upper connecting hole (2) and a lower connecting hole (3) at the upper and lower ends of the housing (1), respectively. An upper connecting component (4) is connected to the upper connecting hole (2), and a water inlet component (5) is connected to the upper connecting component (4). A lower connecting component (6) is connected to the lower connecting hole (3), and a water outlet component (7) is connected to the lower connecting component (6). A digester (8) is provided in the housing (1). The upper end of the digester (8) is connected to the water inlet component (5) through the upper connecting component (4), and the lower end of the digester (8) is connected to the water outlet component (7) through the lower connecting component (6).

2. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, The digester (8) includes a heating element (9) and a digestion tube (10); The heating component (9) includes a temperature control component (11) and a heating tube (12). Multiple heating rings (13) are connected to the heating tube (12). The multiple heating rings (13) are connected to a heating column (14). The heating column (14) is connected to the temperature control component (11). The digestion tube (10) includes a first digestion tube (15), with a second digestion tube (16) connected to both ends of the first digestion tube (15). A first thread (150) is formed on the outer wall of the end of the first digestion tube (15), and the first digestion tube (15) is sleeved inside the heating tube (12).

3. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, The upper connecting component (4) includes an upper threaded connector (17) and a first upper pressure block (18) connected to the upper threaded connector (17). A second upper pressure block (19) is connected to the first upper pressure block (18). The upper threaded connector (17), the first upper pressure block (18) and the second upper pressure block (19) are provided with a first upper connecting hole (20) that communicates with each other. A second upper connecting hole (21) is provided at the end of the upper threaded connector (17). The second upper connecting hole (21) communicates with the first upper connecting hole (20). A second thread (23) is formed on the hole wall of the second upper connecting hole (21).

4. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, The water inlet component (5) includes a water inlet pipe (24) and a first connecting pipe (25) connected to the water inlet pipe (24). A third thread (26) is formed on the outer wall of the other end of the first connecting pipe (25). A control valve is connected to the water inlet pipe (24).

5. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, A sealing ring (27) is provided between the upper connecting component (4) and the water inlet component (5) and between the lower connecting component (6) and the water outlet component (7).

6. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 2, characterized in that, The housing (1) is provided with an installation port (28) and a heat dissipation hole (40). A mounting base (29) is connected to the installation port (28). The temperature control component (11) is connected to the mounting base (29). A transparent glass plate (30) is connected to the outer wall of the housing (1). The transparent glass plate (30) covers the installation port (28).

7. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, The lower connecting component (6) includes a lower threaded connecting body (31) and a first lower pressing block (32) connected to the lower threaded connecting body (31). A second lower pressing block (33) is connected to the first lower pressing block (32). The lower threaded connecting body (31), the first lower pressing block (32) and the second lower pressing block (33) are provided with a first lower connecting hole (34) that communicates with each other. A second lower connecting hole (35) is provided at the end of the lower threaded connecting body (31). The second lower connecting hole (35) communicates with the first lower connecting hole (34). A fourth thread (36) is formed on the hole wall of the second lower connecting hole (35).

8. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 1, characterized in that, The water outlet component (7) includes a water outlet pipe (37) and a second connecting pipe (38) connected to the water outlet pipe (37). A fifth thread (39) is formed on the outer wall of the other end of the second connecting pipe (38). A control valve is connected to the water outlet pipe (37).

9. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 3, characterized in that, The upper connecting hole (2) has a thread on its wall that matches the upper threaded connector (17).

10. The instrument for digesting total phosphorus and total nitrogen in water samples according to claim 7, characterized in that, The lower connecting hole (3) has a thread on its wall that matches the lower threaded connector (31).

Images