A conductivity flow cell

Abstract

The application provides a conductivity flow cell, which comprises a conductivity flow cell barrel and a cap. The top end of the conductivity flow cell barrel is connected with the cap, the side of the top end of the conductivity flow cell barrel is provided with a flow cell inlet, and the bottom end of the conductivity flow cell barrel is provided with a flow cell outlet. When measuring conductivity, electrodes are inserted from the middle of the round hole of the cap, and water to be measured flows into the flow cell inlet and flows out of the flow cell outlet. The material of the conductivity flow cell barrel is polytetrafluoroethylene. The conductivity flow cell barrel is made of polytetrafluoroethylene, so that the conductivity flow cell is light, resistant to falling, compact in structure, and has no adverse effect on conductivity measurement under the condition that the physical and chemical properties are guaranteed.

Description

Technical Field

[0001] This application belongs to the field of flow cell technology, specifically relating to a conductivity flow cell. Background Technology

[0002] Conductivity measurement is a frequently performed routine analysis item in nuclear power plants. Taking the Hualong unit as an example, the demineralization and deoxygenation water tank (RBM001 / 002BA) of the reactor boron and water makeup system is measured weekly, while the positive conductivity of the generator stator cooling water system (TGC) and auxiliary feedwater system (TFA001 / 002BA) is measured at least monthly. Historically, the conductivity flow cells used by the nuclear power plant's chemical department have all been imported equipment. For example... Figures 1 to 4 As shown, the conductivity flow cell 10 includes a conductivity flow cell cylinder a, a wedge-shaped cap b, an annular gasket c, a flow cell outlet d, and a flow cell inlet e. However, the conductivity flow cell cylinder a of this device is made of glass, making it extremely susceptible to damage from drops. Summary of the Invention

[0003] In view of this, the present application aims to provide a conductivity flow cell by replacing the material of the conductivity flow cell cylinder from glass to polytetrafluoroethylene, thereby solving the problem that existing conductivity flow cells are easily damaged by drops.

[0004] This application provides a conductivity flow cell, which includes a flow cell body and a cap. The top of the flow cell body is connected to the cap, and a flow cell inlet is formed on the side of the top of the flow cell body. An outlet is formed at the bottom of the flow cell body. During conductivity measurement, an electrode is inserted through the center of a circular hole in the cap, and the water to be measured flows in from the flow cell inlet and out from the flow cell outlet. The flow cell body is made of polytetrafluoroethylene (PTFE).

[0005] In one specific embodiment of this application, the cap is made of polytetrafluoroethylene.

[0006] In one specific embodiment of this application, the conductivity flow cell further includes a locking structure. The locking structure is located at the top of the conductivity flow cell cylinder and is used to lock the electrode. The locking structure includes a cylindrical gasket, and the vertical distance between the end of the cylindrical gasket furthest from the conductivity flow cell cylinder and the end closest to the conductivity flow cell cylinder is greater than 5 mm.

[0007] In one specific embodiment of this application, the vertical distance between the end of the cylindrical gasket furthest from the conductivity flow cell body and the end closest to the conductivity flow cell body is 12 mm.

[0008] In one specific embodiment of this application, the locking structure further includes a plurality of comb-shaped strips. The plurality of comb-shaped strips are evenly arranged around the periphery of the cylindrical gasket.

[0009] In one specific embodiment of this application, the cap is a wedge-shaped cap. The comb-like strips are inclined.

[0010] In one specific embodiment of this application, the conductivity flow cell further includes a stepped structure. The stepped structure is located between the conductivity flow cell cylinder and the locking structure, and serves to connect the conductivity flow cell cylinder and the locking structure.

[0011] The beneficial effects of the technical solution of this application are as follows: by using polytetrafluoroethylene (PTFE) to prepare the conductivity flow cell cylinder, since PTFE is commonly known as "the king of plastics", it is a high molecular polymer with the chemical formula (C2F4)n. It is resistant to acids and alkalis, impacts, and high temperatures, and is almost insoluble in all solvents. Thus, the conductivity flow cell is lightweight, impact-resistant, and structurally robust while ensuring both physical and chemical properties, and it has no adverse effects on conductivity measurement. Attached Figure Description

[0012] Figure 1 The diagram shown is a blanking plot of a conductivity flow cell.

[0013] Figure 2 As shown Figure 1 The diagram shows a two-dimensional line graph of the conductivity of the flow cell.

[0014] Figure 3 As shown Figure 1 The front view of the conductivity flow cell is shown.

[0015] Figure 4 As shown Figure 1 Left view of the conductivity flow cell shown.

[0016] Figure 5 The diagram shown is a blanking diagram of a conductivity flow cell provided in an embodiment of this application.

[0017] Figure 6 As shown Figure 5 The diagram shows a two-dimensional line graph of the conductivity of the flow cell.

[0018] Figure 7 As shown Figure 5 The front view of the conductivity flow cell is shown.

[0019] Figure 8 As shown Figure 5 Left view of the conductivity flow cell shown.

[0020] Figure 9 The figure shown is a dimensional diagram of a conductivity flow cell provided in an embodiment of this application. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] At least one embodiment of this application provides a conductivity flow cell, referencing... Figures 5 to 9 The conductivity flow cell 100 includes a flow cell body 1 and a cap 2. The top end of the flow cell body 1 is connected to the cap 2. A flow cell inlet A is provided on the side of the top end of the flow cell body 1, and a flow cell outlet B is provided at the bottom end of the flow cell body 1. When measuring conductivity, the electrode is inserted through the center of the circular hole in the cap 2, and the water to be measured flows in from the flow cell inlet A and out from the flow cell outlet B. The flow cell body 1 is made of polytetrafluoroethylene (PTFE).

[0023] The conductivity flow cell cylinder 1 and the cap 2 can be connected as long as they can be connected. Based on this, the embodiments of this application do not specifically limit the connection method of the conductivity flow cell cylinder 1 and the cap 2.

[0024] According to the technical solution provided in the embodiments of this application, the conductivity flow cell cylinder 1 is prepared by using polytetrafluoroethylene (PTFE). Since PTFE is commonly known as "the king of plastics", it is a high molecular polymer with the chemical formula (C2F4)n. It is resistant to acids and alkalis, impacts, and high temperatures, and is almost insoluble in all solvents. As a result, the conductivity flow cell 100 is lightweight, impact-resistant, and has a robust structure. Its physical and chemical properties are guaranteed, and it has no adverse effect on conductivity measurement.

[0025] A free-fall test was conducted on both the conductivity flow cell 10 and the conductivity flow cell 100 at the same height. The results showed that the conductivity flow cell 10 was broken, while the conductivity flow cell 100 remained intact.

[0026] In at least one embodiment of this application, the cap is made of polytetrafluoroethylene (PTFE). Thus, by further utilizing PTFE to prepare the cap, the conductivity flow cell 100 becomes lighter and more impact-resistant.

[0027] Figures 1 to 4In the conductivity flow cell 10 shown, the electrode is inserted through the central hole of the upper wedge-shaped cap b. The water to be tested flows into the flow cell from the inlet e and out from the outlet d. The conductivity flow cell 10 is pressed down by the wedge-shaped cap b, compressing the annular gasket c inward, and is locked by friction only through the inner circumference of the annular gasket c. However, the height of the annular gasket c is usually 3mm-4mm, and the height of the cap is usually 5mm. The contact area between the annular gasket c and the electrode is small, resulting in limited locking force of the cap and the annular gasket c on the electrode.

[0028] To improve the locking force, in at least one embodiment of this application, reference is made to... Figure 6 The conductivity flow cell 100 also includes a locking structure 3. The locking structure 3 is located at the top of the conductivity flow cell cylinder and is used to lock the electrode. The locking structure 3 includes a cylindrical gasket 31, the vertical distance (i.e., height) between the end of the cylindrical gasket furthest from the conductivity flow cell cylinder and the end closest to the conductivity flow cell cylinder cylinder is greater than 5 mm. Thus, by setting the gasket as a cylindrical gasket, the contact area between the cylindrical gasket and the electrode is increased, thereby improving the locking force.

[0029] The height of the cylindrical gasket can be set according to actual needs, for example, refer to Figure 9 In at least one embodiment of this application, the vertical distance between the end of the cylindrical gasket furthest from the conductivity flow cell body and the end closest to the conductivity flow cell body is 12 mm. Correspondingly, the height of the cap can also be set to not less than 12 mm, for example, 12 mm, 13 mm or 14 mm.

[0030] In at least one embodiment of this application, reference is made to Figure 6 The locking structure 3 also includes multiple comb-shaped strips 32. These comb-shaped strips are evenly arranged around the periphery of the cylindrical gasket. Thus, by adding multiple comb-shaped strips around the periphery of the cylindrical gasket, when the cap is pressed down, the comb-shaped strips are compressed inwards, causing the cylindrical gasket to fit tightly against the electrode, increasing the locking force and contact area.

[0031] In at least one embodiment of this application, the cap is a wedge-shaped cap. The comb-shaped strip is inclined. Thus, by setting the cap to a wedge shape and the comb-shaped strip to an inclined shape, as the wedge-shaped cap gradually tightens, the comb-shaped strip is locked inwards by the arc surface of the cap, ensuring the stability of the instrument during measurement. Experiments have shown that since its use in December 2022, there has never been a slippage.

[0032] In at least one embodiment of this application, the conductivity flow cell 100 further includes a stepped structure 4. The stepped structure 4 is located between the conductivity flow cell cylinder and the locking structure, and the stepped structure is used to connect the conductivity flow cell cylinder and the locking structure.

[0033] It should be noted that the combination of the technical features in the embodiments of this application is not limited to the combination methods described in the embodiments of this application or the combination methods described in specific embodiments. All technical features described in this application can be freely combined or combined in any way, unless they contradict each other.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A conductivity flow cell, characterized in that, Includes the conductivity flow cell body, cap, and locking structure. The top of the conductivity flow cell cylinder is connected to the cap. A flow cell inlet is located on the side of the top of the conductivity flow cell cylinder, and a flow cell outlet is located at the bottom of the cylinder. When measuring conductivity, the electrode is inserted through the center of the circular hole in the cap. The water to be measured flows in from the flow cell inlet and out from the flow cell outlet. The conductive flow cell cylinder is made of polytetrafluoroethylene (PTFE), and the cap is also made of PTFE. The locking structure is located at the top of the conductivity flow cell cylinder and is used to lock the electrode. The locking structure includes a cylindrical gasket and multiple comb-shaped strips. The vertical distance between the end of the cylindrical gasket furthest from the conductivity flow cell cylinder and the end closest to the conductivity flow cell cylinder is greater than 5 mm. The multiple comb-shaped strips are evenly arranged around the cylindrical gasket. The cap is a wedge-shaped cap, and the comb-shaped strips are inclined.

2. The conductivity flow cell according to claim 1, characterized in that, The vertical distance between the end of the cylindrical gasket furthest from the conductivity flow cell body and the end closest to the conductivity flow cell body is 12 mm.

3. The conductivity flow cell according to claim 1, characterized in that, It also includes a stepped structure. The stepped structure is located between the conductivity flow cell cylinder and the locking structure, and is used to connect the conductivity flow cell cylinder and the locking structure.

Images