Automatic liquid supplementing device and water content tester

Abstract

The application provides an automatic liquid supplement device, which comprises a liquid supplement pipe, a first sealing ring and a second sealing ring, and a connecting rod. The liquid supplement pipe is provided with a liquid supplement channel along an axial direction of the liquid supplement pipe. The first sealing ring and the second sealing ring are in sealing connection with the liquid supplement channel and can slide in the liquid supplement channel along the axial direction of the liquid supplement pipe, so that one end of the liquid supplement pipe is sealed and the other end is open. The connecting rod is arranged between the first sealing ring and the second sealing ring. The application also provides a water content tester comprising the automatic liquid supplement device. The automatic liquid supplement device can add an anolyte into a titration cup automatically when the anolyte volatilizes until the liquid surface is lower than a certain height without opening the titration cup, so that the height of the liquid surface is maintained stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid supplementing device, in particular to an automatic liquid supplementing device and a water content tester. BACKGROUND

[0002] In the use of the Karl Fischer water content tester by coulometry, the airflow from the heating furnace carries the sample moisture into the anolyte in the titration cup and reacts with it. The main component of the anolyte, methanol, has the characteristics of easy evaporation, and the evaporation speed is accelerated under the action of high-temperature airflow. After the water content tester has been running for a long time and a large number of samples have been tested, the anolyte in the titration cup will be severely evaporated, causing the liquid level to drop, and even below the liquid level of the catholyte. When the anolyte is lower than the catholyte, the liquid level difference will form an internal to external pressure difference, causing the catholyte to seep into the anolyte, and the moisture therein will cause the drift value to increase during the test, reducing the test accuracy. Maintaining the anolyte level above the catholyte during the test can ensure the test accuracy.

[0003] Currently, the method of manually adding anolyte or reducing catholyte is used to maintain the liquid level difference, which is cumbersome to operate and requires frequent contact with the anolyte, which is not conducive to operation and may harm the operator's health. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide an automatic liquid supplementing device that can automatically supplement the anolyte after consumption during testing.

[0005] The present application also provides a water content tester comprising the automatic liquid supplementing device described above.

[0006] The automatic liquid supplementing device according to an embodiment of the present application comprises:

[0007] A liquid supplementing pipe having a liquid supplementing channel formed along the axial direction thereof;

[0008] A first sealing ring and a second sealing ring, the first and second sealing rings being sealingly connected to the liquid supplementing channel, and the first and second sealing rings being capable of sliding in the liquid supplementing channel along the axial direction of the liquid supplementing pipe so that one end of the liquid supplementing pipe is sealed and the other end is open;

[0009] A connecting rod connected between the first and second sealing rings.

[0010] According to some embodiments of the present application, one end of the connecting rod passes through the first sealing ring and extends to the outside of the liquid supplementing pipe.

[0011] According to some embodiments of the present application, the height of the first and second sealing rings is greater than the height of the liquid supplementing pipe.

[0012] According to some embodiments of the present application, the outer wall of the liquid supplementing pipe is provided with a connecting block capable of moving axially along the liquid supplementing pipe.

[0013] According to some embodiments of the present application, the connecting block is threadedly connected to the outer wall of the liquid supplementing pipe.

[0014] According to some embodiments of the present application, a damping ring is clamped between the connecting block (12) and the liquid supplementing pipe (1).

[0015] According to some embodiments of the present application, the connecting block is frustoconical; the upper base diameter D1 of the upper base of the connecting block itself is greater than the lower base diameter D2 of the lower base of the connecting block itself, and the lower base of the connecting block is arranged towards the second sealing ring, and the upper base of the connecting block is arranged towards the first sealing ring.

[0016] According to some embodiments of the present application, the liquid supplementing pipe is a glass pipe, and the connecting block is a ground glass block.

[0017] According to some embodiments of the present application, the water content tester comprises a titration cup and the automatic liquid supplementing device described above, the connecting block cover is arranged on the opening of the titration cup, one end of the liquid supplementing pipe provided with the second sealing ring is located in the titration cup and below the liquid level of the titration solution, and the other end of the liquid supplementing pipe provided with the first sealing ring is located outside the titration cup.

[0018] In summary, the automatic liquid supplementing device and the water content tester provided by the embodiments of the present application have the following technical effects:

[0019] The embodiments of the present application propose an automatic liquid supplementing device, which can automatically add anode liquid into the titration cup when the anode liquid volatilizes until the liquid level is below a certain height without opening the titration cup, so as to maintain the liquid level stable. Moreover, the automatic liquid supplementing device does not need to manually supplement liquid before testing, prevents the decrease of testing accuracy caused by the decrease of the liquid level of the anode liquid during testing, and reduces the direct contact between the instrument operator and the anode liquid.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic diagram of the automatic liquid supplementing device of the embodiments of the present application;

[0022] Figure 2 FIG. 2 is a structural schematic diagram of the automatic liquid supplementing device of the embodiments of the present application; Figure 1

[0023] Figure 3 ​Another structural schematic view of the automatic liquid supplementing device according to the embodiment of the present application;

[0024] Figure 4 For Figure 3 the internal structure schematic view of the automatic liquid supplementing device according to the embodiment of the present application;

[0025] Icon: 1-supplementing pipe, 11-supplementing channel, 12-connecting block, 121-upper bottom surface, 122-lower bottom surface, 2-first sealing ring, 3-second sealing ring, 4-connecting rod. DETAILED DESCRIPTION

[0026] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0029] Reference will now be made to Figures 1-4 The automatic liquid supplementing device and the water content tester according to the embodiments of the present application are described below, and some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0030] In the use process of the coulometric Karl Fischer water content tester, the gas flow from the heating furnace carries the sample moisture into the anolyte in the titration cup and reacts with it.

[0031] The main component of the anolyte, methanol, has the characteristics of easy volatilization, and the volatilization speed is accelerated under the action of high-temperature gas flow. Among them, the loss speed of the standard anolyte containing methanol is about 3.5-4.5 mL / h at a gas flow rate of 150-200 mL / min and a furnace temperature of 200℃.

[0032] After the water content tester is kept running for a long time and a large number of samples are tested, the anolyte in the titration cup will be severely volatilized, causing the liquid level to drop, and even below the liquid level of the catholyte. After the water content tester is kept running for a long time and a large number of samples are tested, the anolyte in the titration cup will be severely volatilized, causing the liquid level to drop, and even below the liquid level of the catholyte.

[0033] When the anode liquid is lower than the cathode liquid, the liquid level difference will form an internal to external pressure difference, causing the cathode liquid to seep into the anode liquid, and the water therein will cause the drift value to increase during the test process, reducing the test accuracy. Maintaining the anode liquid level not lower than the cathode liquid during the test process can ensure the test accuracy.

[0034] Currently, the liquid level difference is maintained by manually adding anode liquid or reducing cathode liquid, which is cumbersome to operate and requires frequent contact with anode liquid, which is not conducive to operation and may harm the operator's health.

[0035] Therefore, the embodiment of the present application proposes an automatic liquid supplementing device, which can automatically add anode liquid to the titration cup when the anode liquid evaporates to a certain height without opening the titration cup, thereby maintaining the liquid level stable. Moreover, using the automatic liquid supplementing device eliminates the need to manually supplement liquid in the titration cup before testing, preventing the test accuracy from decreasing due to the decrease in anode liquid level during the test process, and reducing the direct contact between the instrument operator and the anode liquid.

[0036] According to Figures 1-4 An embodiment of the automatic liquid supplementing device is proposed.

[0037] The automatic liquid supplementing device comprises a liquid supplementing pipe 1, a first sealing ring 2, a second sealing ring 3, and a connecting rod 4.

[0038] Specifically, the liquid supplementing pipe 1 is provided with a liquid supplementing channel 11 along the axial direction thereof. Preferably, the liquid supplementing pipe 1 is a glass pipe. The middle part of the liquid supplementing pipe 1 is provided with the liquid supplementing channel 11 along the axial direction thereof, the anode liquid can be temporarily stored in the liquid supplementing channel 11, and the glass pipe is transparent, so that the operator can directly observe the capacity of the anode liquid in the liquid supplementing channel 11 and supplement the anode liquid in time if the capacity is insufficient.

[0039] Specifically, the first sealing ring 2 is arranged at one end of the liquid supplementing pipe 1, and the second sealing ring 3 is arranged at the other end of the liquid supplementing pipe 1. The first sealing ring 2 or the second sealing ring 3 can be movably sealed at the end of the liquid supplementing pipe 1, so that one end of the liquid supplementing pipe 1 is sealed and the other end is open. In this way, the first sealing ring 2 and the second sealing ring 3 are both in sealing connection with the liquid supplementing channel 11, and one of the first sealing ring 2 and the second sealing ring 3 can be sealed at the end of the liquid supplementing pipe 1, so that one end of the liquid supplementing pipe 1 is sealed and the other end is open. Preferably, the first sealing ring 2 and the second sealing ring 3 are arranged in an upper-lower layout, the first sealing ring 2 is sealingly arranged at the top end of the liquid supplementing pipe 1, and the second sealing ring 3 is sealingly arranged at the bottom end of the liquid supplementing pipe 1.

[0040] According to the present embodiment, the automatic liquid supplementing device can add anolyte into the titration cup automatically when the anolyte evaporates until the liquid level is below a certain height without opening the titration cup. The specific automatic liquid supplementing process is as follows:

[0041] First, add anolyte into the liquid supplementing pipe 1. Block the bottom end pipe opening of the liquid supplementing pipe 1 with the second sealing ring 3, and do not block the top end pipe opening of the liquid supplementing pipe 1 with the first sealing ring 2, so that the top end pipe opening of the liquid supplementing pipe 1 is open and the bottom end pipe opening of the liquid supplementing pipe 1 is closed, as shown in Figure 1 and Figure 2 At this moment, the operator can manually add anolyte into the liquid supplementing pipe 1 through the top end pipe opening.

[0042] Second, place the automatic liquid supplementing device into the titration cup. At this moment, the bottom end pipe opening of the liquid supplementing pipe 1 is below the liquid level of the anolyte in the titration cup, and the top end pipe opening of the liquid supplementing pipe 1 is outside the titration cup. The second sealing ring 3 is also below the liquid level of the anolyte, and the first sealing ring 2 is outside the titration cup. Block the top end pipe opening of the liquid supplementing pipe 1 with the first sealing ring 2, so that the top end pipe opening of the liquid supplementing pipe 1 is closed. Remove the second sealing ring 3 from the bottom end pipe opening of the liquid supplementing pipe 1, so that the bottom end pipe opening of the liquid supplementing pipe 1 is open, as shown in Figure 3 and Figure 4 .

[0043] Finally, the automatic liquid supplementing device enters the automatic liquid supplementing state. When the liquid level of the anolyte in the titration cup is higher than the bottom end pipe opening of the liquid supplementing pipe 1, the anolyte in the liquid supplementing pipe 1 is stable and does not leak due to the atmospheric pressure. When the anolyte in the titration cup evaporates until the liquid level of the anolyte is below the bottom end pipe opening of the liquid supplementing pipe 1, the external air enters the liquid supplementing pipe 1, so that the anolyte in the liquid supplementing pipe 1 flows out of the bottom end pipe opening of the liquid supplementing pipe 1 into the titration cup, thereby supplementing the anolyte in the titration cup. When the liquid level of the supplemented anolyte is again higher than the bottom end pipe opening of the liquid supplementing pipe 1, the anolyte in the liquid supplementing pipe 1 does not flow out any more, thereby forming an automatic liquid supplementing cycle.

[0044] Therefore, according to the present embodiment, the automatic liquid supplementing device has the following advantages:

[0045] First, after using the automatic liquid supplementing device to supplement the anolyte, when the anolyte in the titration cup is insufficient, the operator does not need to manually supplement the anolyte by opening the titration cup before testing as in the prior art, but only needs to add a certain amount of anolyte solution into the automatic liquid supplementing device once, and does not need to manually supplement the anolyte again until the anolyte solution in the automatic liquid supplementing device is completely consumed.

[0046] Secondly, during the test, the anolyte in the titration cup can be automatically replenished after consumption, preventing the test accuracy from being reduced due to the lowering of the liquid level of the anolyte.

[0047] Finally, due to the automatic replenishment, manual operation is not required, thereby reducing the direct contact between the instrument operator and the anolyte and preventing the test accuracy from being reduced.

[0048] More importantly, the automatic replenishment device has high replenishment sensitivity. As long as the liquid level of the anolyte in the titration cup is lower than the bottom end of the replenishment pipe 1, the titration cup can be immediately replenished with anolyte. However, the existing replenishment device needs to be equipped with a plurality of sensors, a plurality of programming instructions, or a plurality of machines. Once the number of machines is large, the replenishment sensitivity is easily reduced. Moreover, once the number of machines is large, replenishment failure is extremely easy to occur. However, the automatic replenishment device has a simple structure and uses atmospheric pressure, so replenishment failure is basically difficult to occur, thereby reducing the replenishment failure rate.

[0049] According to Figures 1-4 , further, the connecting rod 4 is connected between the first sealing ring 2 and the second sealing ring 3. Preferably, the height of the connecting rod 4 between the first sealing ring 2 and the second sealing ring 3 is greater than the height of the replenishment pipe 1. The connecting rod 4 can be a straight rod structure and is arranged in the replenishment pipe 1, for synchronously moving the first sealing ring 2 and the second sealing ring 3. Of course, other workpieces capable of synchronously moving the first sealing ring 2 and the second sealing ring 3 can also be used, for example, a linkage member is arranged outside the replenishment pipe 1, and the two ends of the linkage member are provided with a bending structure to correspondingly connect the first sealing ring 2 and the second sealing ring 3.

[0050] According to the embodiment, the automatic replenishment process is as follows:

[0051] Firstly, the anolyte is added into the replenishment pipe 1. The first sealing ring 2 is moved upwards to separate the first sealing ring 2 from the top end of the replenishment pipe 1, so that the top end of the replenishment pipe 1 is in an open state. Since the connecting rod 4 is arranged between the first sealing ring 2 and the second sealing ring 3, the first sealing ring 2 and the second sealing ring 3 are synchronously moved, and the second sealing ring 3 is also moved upwards. Since the height of the connecting rod 4 is greater than the height of the replenishment pipe 1, when the first sealing ring 2 separates from the top end of the replenishment pipe 1, the second sealing ring 3 is sealed to the bottom end of the replenishment pipe 1, so as to form a structure in which the top end of the replenishment pipe 1 is open and the bottom end of the replenishment pipe 1 is closed. For details, please refer to Figure 1 and Figure 2 At this moment, the instrument operator can manually add the anolyte into the replenishment pipe 1 through the top end of the replenishment pipe 1.

[0052] Secondly, the automatic liquid supplement device is placed in the titration cup. The bottom end of the liquid supplement pipe 1 is below the liquid level of the anolyte in the titration cup, and the top end of the liquid supplement pipe 1 is outside the titration cup. At this moment, the second sealing ring 3 is also below the liquid level of the anolyte, and the first sealing ring 2 is outside the titration cup. Then, the first sealing ring 2 is moved downward, and the first sealing ring 2 is resealed and connected to the top end of the liquid supplement pipe 1, so that the top end of the liquid supplement pipe 1 is in a sealed state. Since the connecting rod 4 is arranged between the first sealing ring 2 and the second sealing ring 3, the first sealing ring 2 and the second sealing ring 3 move synchronously, and the second sealing ring 3 also moves downward. Since the height of the connecting rod 4 is greater than the height of the liquid supplement pipe 1, when the first sealing ring 2 is resealed and connected to the top end of the liquid supplement pipe 1, the second sealing ring 3 is disconnected from the bottom end of the liquid supplement pipe 1, so that the bottom end of the liquid supplement pipe 1 is in an open state, thereby forming a structure in which the top end of the liquid supplement pipe 1 is closed and the bottom end of the liquid supplement pipe 1 is open. For details, please refer to Figure 3 and Figure 4 .

[0053] Finally, the automatic liquid supplement device enters an automatic liquid supplement state. When the liquid level of the anolyte in the titration cup is higher than the bottom end of the liquid supplement pipe 1, the anolyte in the liquid supplement pipe 1 is stable and does not leak due to the atmospheric pressure. When the anolyte in the titration cup evaporates until the liquid level of the anolyte is lower than the bottom end of the liquid supplement pipe 1, the external air enters the liquid supplement pipe 1, so that the anolyte in the liquid supplement pipe 1 flows out of the bottom end of the liquid supplement pipe 1 into the titration cup, thereby supplementing the anolyte in the titration cup. When the liquid level of the supplemented anolyte is again higher than the bottom end of the liquid supplement pipe 1, the anolyte in the liquid supplement pipe 1 no longer flows out, thereby forming an automatic liquid supplement cycle.

[0054] Specifically, one end of the connecting rod 4 passes through the first sealing ring 2 and extends to the outside of the liquid supplement pipe 1. According to the present embodiment, the connecting rod 4 extends to the outside of the liquid supplement pipe 1, which facilitates the movement of the first sealing ring 2 and the second sealing ring 3 by the instrument operator.

[0055] Specifically, the outer wall of the liquid supplement pipe 1 is provided with a connecting block 12 which can move axially along the liquid supplement pipe 1. That is, the connecting block 12 can adjust the position on the liquid supplement pipe 1. Since water test is required, the lower end of the liquid supplement pipe 1 is required to be below the liquid level, and therefore the distance H1 from the liquid level to the top of the titration cup is less than or equal to the distance H2 from the lower end of the liquid supplement pipe 1 to the connecting block 12. Since the liquid level in different titration cups is different, the movable connecting block 12 is arranged to adjust the position of the connecting block 12 on the liquid supplement pipe 1, so that the distance H1 is less than or equal to the distance H2, thereby meeting the experimental requirements.

[0056] And the implementation can be selected, the connecting block 12 is threadedly connected to the outer wall of the liquid supplement pipe 1, by rotating the connecting block 12, the connecting block 12 can move axially along the liquid supplement pipe 1, and then the position of the connecting block 12 on the liquid supplement pipe 1 is adjusted, and after being adjusted to the appropriate position, the thread can also be self-locking, so that the connecting block 12 can be stably fixed on the liquid supplement pipe 1.

[0057] Alternatively, a damping ring is clamped between the connecting block 12 and the liquid supplement pipe 1, by increasing the friction between the connecting block 12 and the liquid supplement pipe 1, when the position of the connecting block 12 needs to be adjusted, the experimenter adjusts the position of the damping ring, and then drives the connecting block 12 to adjust to the appropriate position; and after being adjusted to the appropriate position, the connecting block 12 can be stably fixed on the liquid supplement pipe 1 by the friction of the damping ring.

[0058] And preferably, the connecting block 12 is in the shape of a circular truncated cone, and the connecting block 12 is provided as a frosted glass block. And the upper base diameter D1 of the upper base surface 121 of the connecting block 12 is greater than the lower base diameter D2 of the lower base surface 122 of the connecting block 12, and the lower base surface 122 of the connecting block 12 is arranged towards the second sealing ring 3, and the upper base surface 121 of the connecting block 12 is arranged towards the first sealing ring 2.

[0059] According to the present embodiment, since the liquid supplement pipe 1 needs to be assembled into the titration cup, in order to ensure the assembly stability of both the liquid supplement pipe 1 and the titration cup, the connecting block 12 is arranged on the outer wall of the liquid supplement pipe 1, and an opening is arranged on the titration cup, the opening and the connecting block 12 are in abutment, and the liquid supplement pipe 1 can be stably assembled on the titration cup. And the connecting block 12 is a frosted glass block in the shape of a circular truncated cone, so the opening is also a frosted glass opening in the shape of a circular truncated cone, so that after the frosted glass block and the frosted glass opening are in abutment, a good sealing effect can be achieved. And the connecting block 12 is arranged in an inverted circular truncated cone structure, which is more stable after assembly, uniformly stressed, and not easy to be separated from the opening of the titration cup.

[0060] Specifically, the diameter difference D3 between the upper base diameter D1 of the upper base surface 121 of the connecting block 12 and the lower base diameter D2 of the lower base surface 122 is 1mm≤D3≤2mm. In actual assembly, since the connecting block 12 needs to be assembled into the opening on the titration cup, in order to improve the stability after assembly, through multiple simulation experiments, it is found that the diameter difference D3 between the upper base diameter D1 and the lower base diameter D2 of the connecting block 12 in the shape of a circular truncated cone is controlled within the range of 1mm-2mm is the best, when the titration cup is in the full anode liquid state, or the titration cup is in the empty cup state, or the liquid supplement pipe 1 is in the full anode liquid state, or the liquid supplement pipe 1 is in the empty pipe state, the automatic liquid supplementing device can be stably assembled on the titration cup, and the problem of overturning or pouring does not occur.

[0061] The embodiment of the present application not only proposes the automatic liquid supplement device, but also proposes a water content tester comprising the automatic liquid supplement device. The water content tester comprises a titration cup and the automatic liquid supplement device. The connecting block 12 is arranged on the opening of the titration cup. One end of the liquid supplement pipe 1 provided with the second sealing ring 3 is arranged in the titration cup below the liquid level of the titration liquid. The other end of the liquid supplement pipe 1 provided with the first sealing ring 2 is arranged outside the titration cup.

[0062] The embodiment of the present application not only proposes the water content tester, but also proposes an automatic liquid supplement method applicable to the automatic liquid supplement device and the water content tester, comprising the following steps.

[0063] Moving the connecting rod 4 to form an open state of the first sealing ring 2 at one end of the liquid supplement pipe 1 and a sealing state of the second sealing ring 3 at the other end of the liquid supplement pipe 1.

[0064] Adding anhydrous anode liquid into the liquid supplement pipe 1.

[0065] Arranging the automatic liquid supplement device on the titration cup. The other end of the liquid supplement pipe 1 is arranged below the liquid level in the titration cup.

[0066] Moving the connecting rod 4 to form a sealing state of the first sealing ring 2 at one end of the liquid supplement pipe 1 and an open state of the second sealing ring 3 at the other end of the liquid supplement pipe 1.

[0067] Until the anode liquid solution in the liquid supplement pipe 1 is consumed, the liquid supplement pipe 1 is taken out to repeat the above steps.

[0068] Specifically, the operation process is as follows.

[0069] Step S01, moving the connecting rod 4 upwards to drive the second sealing ring 3 into the bottom end of the liquid supplement pipe 1 to form a sealing state and drive the first sealing ring 2 away from the top end of the liquid supplement pipe 1 to form an open state.

[0070] Step S02, adding anhydrous anode liquid into the liquid supplement pipe 1 in a dry environment.

[0071] Step S03, arranging the automatic liquid supplement device on the titration cup. The bottom end of the liquid supplement pipe 1 is arranged below the liquid level.

[0072] Step S04, moving the connecting rod 4 downwards to drive the first sealing ring 2 into the top end of the liquid supplement pipe 1 to form a sealing state and drive the second sealing ring 3 away from the bottom end of the liquid supplement pipe 1 to form an open state.

[0073] Step S05, when the liquid level of the anode liquid in the titration cup is below the top end of the liquid supplement pipe 1, the internal anode liquid solution of the liquid supplement pipe 1 automatically flows out to supplement. Until the anode liquid solution in the liquid supplement pipe 1 is consumed, the liquid supplement pipe 1 is taken out to repeat steps S01 to S04.

[0074] The technical means disclosed in the present application are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. An automatic liquid replenishment device, characterized in that, include: A replenishment tube (1) has a replenishment channel (11) extending through it along its own axis; The first sealing ring (2) is disposed at one end of the liquid replenishment tube (1); The second sealing ring (3) is disposed at the other end of the liquid replenishment tube (1); The first sealing ring (2) or the second sealing ring (3) can be movably sealed at the opening of the replenishment tube (1) so that one end of the replenishment tube (1) is sealed and the other end is open. A connecting rod (4) is connected between the first sealing ring (2) and the second sealing ring (3).

2. The automatic fluid replenishment device according to claim 1, characterized in that, One end of the connecting rod (4) is connected to the second sealing ring (3), and the other end passes through the first sealing ring (2) and extends to the outside of the replenishment tube (1).

3. The automatic fluid replenishment device according to claim 2, characterized in that, The height of the first sealing ring (2) and the second sealing ring (3) is greater than the height of the liquid replenishment tube (1).

4. The automatic fluid replenishment device according to claim 1, characterized in that, The outer wall of the replenishment tube (1) is provided with a connecting block (12) that can move along the axial direction of the replenishment tube (1).

5. The automatic fluid replenishment device according to claim 4, characterized in that, The connecting block (12) is threaded to the outer wall of the replenishment tube (1).

6. The automatic fluid replenishment device according to claim 4, characterized in that, A damping ring is sandwiched between the connecting block (12) and the replenishment pipe (1).

7. The automatic fluid replenishment device according to claim 4, characterized in that, The connecting block (12) is frustum-shaped; The upper bottom diameter D1 of the upper bottom surface (121) of the connecting block (12) is greater than the lower bottom diameter D2 of the lower bottom surface (122), and the lower bottom surface (122) of the connecting block (12) is set towards the second sealing ring (3), while the upper bottom surface (121) of the connecting block (12) is set towards the first sealing ring (2).

8. The automatic fluid replenishment device according to claim 7, characterized in that, The diameter difference between the upper bottom diameter D1 of the upper bottom surface (121) and the lower bottom diameter D2 of the lower bottom surface (122) of the connecting block (12) is D3, where D3 = R1 - R2, and 1mm ≤ D3 ≤ 2mm.

9. A moisture analyzer, characterized in that, The device includes a titration cup and an automatic liquid replenishment device according to any one of claims 4-8, wherein the connecting block (12) is disposed over the opening of the titration cup, one end of the liquid replenishment tube (1) having a second sealing ring (3) is located inside the titration cup and below the liquid surface of the titrant, and the other end of the liquid replenishment tube (1) having a first sealing ring (2) is located outside the titration cup.

10. An automatic liquid replenishment method, applied to the automatic liquid replenishment device according to any one of claims 1-8, or applied to the moisture analyzer according to claim 9, characterized in that, Includes the following steps: Move the connecting rod (4) so ​​that the first sealing ring (2) forms an open state at one end of the liquid replenishment tube (1) and the second sealing ring (3) forms a sealed state at the other end of the liquid replenishment tube (1); Add anhydrous anolyte to the replenishment tube (1); Install the automatic liquid replenishment device on the titration cup, with the other end of the liquid replenishment tube (1) below the liquid level in the titration cup; Move the connecting rod (4) so ​​that the first sealing ring (2) forms a sealed state at one end of the liquid replenishment tube (1) and the second sealing ring (3) forms an open state at the other end of the liquid replenishment tube (1); When the anolyte solution in the replenishment tube (1) is completely consumed, remove the replenishment tube (1) and repeat the above steps.

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