Titration device

Abstract

The embodiment of the utility model provides a titration device. The titration device comprises a reaction container, and a burette, a liquid blowing assembly and an electrode which are arranged above the reaction container, the reaction container is used for containing a solution to be detected, and the burette is used for adding a titrant into the reaction container; the liquid blowing assembly comprises a gas outlet part and is used for blowing gas to the liquid level of the to-be-detected solution through the gas outlet part, so that the titrant and the to-be-detected solution are uniformly mixed; the electrode is immersed in the solution to be measured and is used for measuring the potential change of the solution to be measured so as to determine a titration end point.

Description

Technical Field

[0001] The present disclosure relates to the field of analytical testing instruments, and particularly to a titration device. Background Art

[0002] In related technologies, most titration devices achieve the mixing between the titrant and the solution to be measured through a propeller or a magnetic stir bar. However, the propeller or the magnetic stir bar is likely to collide with the glass electrode or the container wall during stirring, causing damage to the glass electrode or the container wall, and further affecting the titration reaction between the titrant and the solution to be measured.

[0003] Therefore, there is an urgent need to provide a titration device that can solve the above problems. Summary of the Utility Model

[0004] In view of this, an embodiment of the present disclosure provides a titration device.

[0005] To achieve the above object, the technical solution of the present disclosure is realized as follows:

[0006] An embodiment of the present disclosure provides a titration device, including: a reaction vessel, and a burette, a blowing component, and an electrode disposed above the reaction vessel; the reaction vessel is used to hold the solution to be measured, and the burette is used to add the titrant into the reaction vessel; the blowing component includes an air outlet portion, and the blowing component is used to blow gas to the liquid surface of the solution to be measured through the air outlet portion to make the titrant and the solution to be measured mix evenly; the electrode is immersed in the solution to be measured and is used to measure the potential change of the solution to be measured to determine the titration end point.

[0007] In some embodiments, the included angle between the air outlet portion and the liquid surface of the solution to be measured satisfies a first preset condition.

[0008] In some embodiments, the distance between the air outlet portion and the liquid surface of the solution to be measured satisfies a second preset condition.

[0009] In some embodiments, the air outlet portion is made of a deformable material.

[0010] In some embodiments, it further includes a fixture for fixing the blowing component; the fixture includes a rotating part, and the rotating part is used to adjust the included angle between the air outlet portion and the liquid surface of the solution to be measured to satisfy the first preset condition.

[0011] In some embodiments, the blowing component further includes a positioning module, which is used to measure the measured distance between the positioning module and the liquid surface of the solution to be measured to obtain the actual distance between the air outlet portion and the liquid surface of the solution to be measured.

[0012] In some embodiments, the fixture further includes an adjustment module configured to adjust the distance between the gas outlet portion and the liquid surface of the solution to be measured according to the actual distance, so as to meet the second preset condition.

[0013] In some embodiments, a scale for indicating the rotation angle of the liquid blowing assembly is provided on the fixture.

[0014] In some embodiments, the liquid blowing assembly further includes a controllable switch for controlling the gas flow rate.

[0015] In some embodiments, the liquid blowing assembly further includes a flowmeter for monitoring the gas flow rate.

[0016] An embodiment of the present disclosure provides a titration device, including: a reaction vessel, and a burette, a liquid blowing assembly, and an electrode disposed above the reaction vessel; the reaction vessel is configured to hold a solution to be measured, the burette is configured to add a titrant into the reaction vessel; the liquid blowing assembly includes a gas outlet portion, and the liquid blowing assembly is configured to blow gas through the gas outlet portion to the liquid surface of the solution to be measured, so that the titrant and the solution to be measured are mixed evenly; the electrode is immersed in the solution to be measured and is configured to measure the potential change of the solution to be measured to determine the titration end point. The titration device provided by the embodiment of the present disclosure mixes the titrant and the solution to be measured by blowing gas to the liquid surface of the solution to be measured through the gas outlet portion, which can not only avoid damaging the electrode when stirring the solution to be measured, but also reduce the pollution brought by the liquid blowing assembly to the solution to be measured. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a titration device provided by an embodiment of the present disclosure;

[0018] Figure 2 is provided by an embodiment of the present disclosure Figure 1 a partial schematic diagram of the titration device in;

[0019] Figure 3 is a schematic structural diagram of a liquid blowing assembly provided by an embodiment of the present disclosure;

[0020] Figure 4 is a schematic structural diagram of the fixture provided by an embodiment of the present disclosure Figure 1 ;

[0021] Figure 5 is a schematic structural diagram of the fixture provided by an embodiment of the present disclosure Figure 2 ;

[0022] Figure 6 is a schematic structural diagram of the fixture provided by an embodiment of the present disclosure Figure 3 ;

[0023] Figure 7Structural schematic of the fixture provided by the embodiments of the present disclosure Figure 4 ;

[0024] Figure 8 Structural schematic of the fixture provided by the embodiments of the present disclosure Figure 5 。 Detailed implementation manners

[0025] Next, in combination with the embodiments and the accompanying drawings of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present disclosure.

[0026] In the following description, numerous specific details are given to provide a more thorough understanding of the present disclosure. However, it is obvious to those skilled in the art that the present disclosure can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present disclosure, some well-known technical features are not described; that is, not all features of the actual embodiments are described here, and the well-known functions and structures are not described in detail.

[0027] In the accompanying drawings, for clarity, the dimensions of layers, regions, elements, and their relative dimensions may be exaggerated. The same reference numerals represent the same elements throughout.

[0028] It should be understood that when an element or layer is referred to as being "on", "adjacent to", "connected to", or "coupled to" another element or layer, it can be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on", "directly adjacent to", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer, or part discussed below may be represented as the second element, component, region, layer, or part. And when discussing the second element, component, region, layer, or part, it does not indicate that the present disclosure necessarily has a first element, component, region, layer, or part.

[0029] Spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms are also intended to include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, then an element or feature described as "under other elements" or "beneath them" or "underneath them" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0030] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0031] To fully understand the present disclosure, detailed steps and detailed structures will be presented in the following description to illustrate the technical solutions of the present disclosure. The preferred embodiments of the present disclosure are described in detail below. However, in addition to these detailed descriptions, the present disclosure may have other embodiments.

[0032] Figure 1 The structural schematic diagram of a titration device provided for the embodiments of the present disclosure. Refer to Figure 1 The titration device includes: a reaction vessel 110, and a burette 120, a liquid blowing assembly 130 and an electrode 140 provided above the reaction vessel 110; the reaction vessel 110 is used to hold the solution to be tested, and the burette 120 is used to add a titrant into the reaction vessel 110; the liquid blowing assembly 130 includes an air outlet part 131, and the liquid blowing assembly 130 is used to blow gas to the liquid surface of the solution to be tested through the air outlet part 131 to make the titrant and the solution to be tested mix evenly; the electrode 140 is immersed in the solution to be tested and is used to measure the potential change of the solution to be tested to determine the titration end point.

[0033] While the burette 120 adds the titrant to the reaction vessel 110, the liquid blowing assembly 130 purges gas through the air outlet 131 towards the liquid surface of the solution to be measured to form a stable eddy current in the solution to be measured, so that the titrant and the solution to be measured are evenly mixed. During the titration process, the part of the electrode 140 for detecting the potential is immersed inside the solution to be measured to measure the potential data of the solution to be measured in real time. The electrode 140 sends the measured potential data to the control system in real time, and the control system controls the titration operation of the burette 120 and the blowing operation process of the liquid blowing assembly 130 according to the potential data in real time.

[0034] In some embodiments, the liquid blowing assembly 130 further includes an air inlet 132. The air inlet 132 is connected to the air outlet 131. The air inlet 132 has an air inlet, and the air inlet of the air inlet 132 is connected to a gas supply device. The gas supply device is used to introduce an inert gas or other gas that does not affect the titration reaction into the liquid blowing assembly 130 through the air inlet of the air inlet 132. Therefore, the liquid blowing assembly 130 can purge gas through the air outlet of the air outlet 131 towards the liquid surface of the solution to be measured, so that the titrant and the solution to be measured are evenly mixed and do not affect the titration reaction. It should be noted that the gas supply device can be connected to the air inlet of the air inlet 132 through a rubber hose.

[0035] In the embodiments of the present disclosure, a composite electrode capable of independently measuring the potential of the solution to be measured can be used as the electrode 140, or the electrode 140 can be composed of a reference electrode and an indicating electrode together to measure the potential of the solution to be measured.

[0036] In some embodiments, the burette 120, the liquid blowing assembly 130 and the electrode 140 do not contact each other pairwise. Among them, the burette 120 does not contact the reaction vessel 110 and the solution to be measured. The air outlet 131 has an air outlet, and the air outlet of the air outlet 131 does not face the burette 120 and the electrode 140, avoiding the burette 120 and the electrode 140 from affecting the purging of the gas on the surface of the solution to be measured and thus affecting the formation of the eddy current in the solution to be measured, and also avoiding the gas purging the surface of the solution to be measured from affecting the burette 120 and the electrode 140.

[0037] In some embodiments, the burette 120 can be connected to a liquid supply device, and the liquid supply device is used to automatically replenish the titrant to the burette 120. The burette 120 can be an automatic burette and can automatically drip the titrant into the reaction vessel 110. The control system controls the titration speed and process of the burette 120 according to the potential data of the solution to be measured. The control system also closes the blowing operation of the liquid blowing assembly 130 or the gas supply operation of the gas supply device after a preset time when the titration of the burette 120 ends. It should be noted that as long as the last drop of titrant can be evenly mixed with the solution to be measured within the preset time, the present disclosure does not make other restrictions on the length of the preset time.

[0038] The titration device provided by the embodiments of the present disclosure blows the liquid surface of the solution to be measured with gas, so as to mix the titrant and the solution to be measured evenly. Since the gas does not directly contact the solution to be measured, it can reduce the contamination brought by external devices, avoid generating aerosols by blowing air into the solution to be measured and thus affecting the titration reaction, prevent the electrode 140 from being damaged by collision, and avoid the electromagnetic pollution caused by mixing the titrant and the solution to be measured evenly by an electromagnetic stirrer in the related art.

[0039] It should be noted that the control system in the embodiments of the present disclosure can be any one of control systems such as a single-chip microcomputer, a computer, a CPU controller, or a microcontroller.

[0040] In some embodiments, the included angle α between the air outlet part 131 and the liquid surface of the solution to be measured satisfies a first preset condition.

[0041] Figure 2 For the Figure 1 titration device provided by the embodiments of the present disclosure. Refer to Figure 2 , the included angle between the air outlet part 131 and the liquid surface of the solution to be measured is α. Specifically, the first preset condition can be that the included angle α is 15°, 20°, 30°, 45°, 60° or 70°, etc. To avoid the gas directly impacting the liquid surface of the solution to be measured and generating bubbles, which will affect the titration process, the included angle α is not equal to 90°, that is, the included angle α is within the range of 0° to 90° or within the range of 90° to 180°.

[0042] Preferably, the included angle α is within the range of 0° to 80° or within the range of 100° to 180°.

[0043] Preferably, the included angle α is within the range of 10° to 80° or within the range of 100° to 170°.

[0044] In some embodiments, the distance d between the air outlet part 131 and the liquid surface of the solution to be measured satisfies a second preset condition.

[0045] Refer to Figure 2 , the distance between the air outlet part 131 and the liquid surface of the solution to be measured is d. Specifically, the distance d refers to the distance between the air outlet of the air outlet part 131 and the liquid surface of the solution to be measured. The second preset condition can be the range of the distance d when a stable vortex can be formed. Specifically, the distance d can be predicted according to the relationship between the vortex, the distance d, the included angle α, and the gas flow rate.

[0046] In some embodiments, a starting distance d0 may be set between the gas outlet of the gas outlet portion 131 and the liquid level of the solution to be measured. The starting distance d0 is any value between 0.5 cm and 2 cm. Specifically, the starting distance d0 may be 0.6 cm, 0.8 cm, 1.0 cm, 1.2 cm, 1.4 cm, 1.6 cm, 1.8 cm, etc. The formation effect of the eddy current is observed through experiments, and the distance d between the gas outlet of the gas outlet portion 131 and the liquid level of the solution to be measured is gradually adjusted. After a stable eddy current is formed, the titration operation is performed.

[0047] In some embodiments, the gas outlet portion 131 is made of a deformable material, for example, it may be made of a plastically deformable material.

[0048] In some embodiments, the gas outlet portion 131 and the gas inlet portion 132 may be connected by plugging. The gas outlet portion 131 can undergo plastic deformation at room temperature, so that the included angle α between the gas outlet portion 131 and the liquid level of the solution to be measured can be adjusted to meet the first preset condition. It should be noted that the material of the gas inlet portion 132 can be a material with suitable strength, high durability, corrosion resistance, etc., such as metal, plastic, composite material or polymer material. Specifically, the gas inlet portion 132 can be a glass tube, a steel tube or a PFA tube.

[0049] In some embodiments, there may be an included angle of any angle between the gas outlet portion 131 and the gas inlet portion 132. When adjusting the included angle α between the gas outlet portion 131 and the liquid level of the solution to be measured, the included angle between the gas outlet portion 131 and the gas inlet portion 132 changes accordingly. Specifically, Figure 2 Taking the included angle between the gas outlet portion 131 and the gas inlet portion 132 being 180° as an example for illustration. When the included angle between the gas outlet portion 131 and the gas inlet portion 132 is 180°, regardless of whether the angle α between the gas outlet portion 131 and the liquid level of the solution to be measured increases or decreases, the included angle between the gas outlet portion 131 and the gas inlet portion 132 decreases accordingly.

[0050] It should be noted that there are two included angles between the gas outlet portion 131 and the gas inlet portion 132, and the sum of the two included angles is 360°. In practical applications, the included angle between the gas outlet portion 131 and the gas inlet portion 132 specifically refers to the included angle between 0° and 180° (including 180°).

[0051] Figure 3 is a schematic structural diagram of a liquid blowing assembly provided by an embodiment of the present disclosure. Refer to Figure 3 The liquid blowing assembly 130 further includes a controllable switch 133 for controlling the gas flow rate.

[0052] The controllable switch 133 can be arranged on the air inlet part 132 or at the air inlet of the air inlet part 132. By adjusting the opening degree of the controllable switch 133, the opening degree of the air inlet part 132 can be adjusted to control the gas flow rate and gas velocity in the liquid blowing assembly 130. When the included angle α and the distance d between the air outlet part 131 and the liquid level of the solution to be measured remain unchanged, the gas flow rate can be adjusted by adjusting the opening degree of the controllable switch 133 to form a stable eddy current in the solution to be measured, so that the titrant and the solution to be measured can be mixed evenly.

[0053] In some embodiments, the controllable switch 133 can be selected from any one of a pneumatic control valve, a solenoid valve or a manual valve.

[0054] In some embodiments, the liquid blowing assembly 130 further includes a flowmeter 134 for monitoring the gas flow rate.

[0055] See Figure 3 , the liquid blowing assembly 130 further includes a flowmeter 134. The flowmeter 134 is arranged at a position between the controllable switch 133 and the air outlet of the air outlet part 131, so that the gas flow rate adjusted by the controllable switch 133 can be measured.

[0056] In some embodiments, the flowmeter 134 is further configured to send the flow rate data to the control system in real time, and the control system can adjust the opening degree of the controllable switch 133 according to the flow rate data.

[0057] In some embodiments, the flowmeter 134 can be selected from any one of a turbine flowmeter, an electromagnetic flowmeter, an orifice flowmeter or an ultrasonic flowmeter. Preferably, the flowmeter 134 can be clamped on the air inlet part 132 or the air outlet part 131 to avoid affecting the gas velocity or polluting the gas due to the installation method of the flowmeter 134 (for example, being inserted into the air inlet part 132 or the air outlet part 131).

[0058] In some embodiments, the liquid blowing assembly 130 further includes a positioning module 135 for measuring the measurement distance between the positioning module 135 and the liquid level of the solution to be measured to obtain the actual distance between the air outlet part 131 and the liquid level of the solution to be measured.

[0059] See Figure 3, the liquid blowing assembly 130 further includes a positioning module 135, which is clamped on the air inlet part 132. The positioning module 135 can be used to send the measured distance to the control system in real time. The control system determines the actual distance between the air outlet part 131 and the liquid level of the solution to be measured according to the measured distance, and adjusts the distance d between the air outlet part 131 and the liquid level of the solution to be measured according to the actual distance. In this way, when the liquid level of the solution to be measured rises due to the titrant, the distance d between the air outlet part 131 and the liquid level of the solution to be measured can be adjusted in real time, avoiding the problem of unstable vortex caused by the rise of the liquid level of the solution to be measured due to the titrant.

[0060] In some embodiments, the positioning module 135 may include a ranging instrument, such as an ultrasonic ranging instrument or a lidar ranging instrument. It should be noted that the positioning module 135 can also be clamped on the air outlet part 131.

[0061] In some embodiments, the titration device further includes a fixture for fixing the liquid blowing assembly 130; the fixture includes a rotating part, and the rotating part is used to adjust the angle α between the air outlet part 131 and the liquid level of the solution to be measured to meet the first preset condition.

[0062] Figure 4 Structural schematic of the fixture provided by the embodiments of the present disclosure Figure 1 。

[0063] See Figure 4 , the fixture includes a cross bar 410 and a vertical bar 420 connected perpendicularly to each other. The cross bar 410 includes a rotating part 411, and the rotating part 411 includes a first jack 412 for clamping the liquid blowing assembly 130. The rotation angle of the rotating part 411 can be adjusted manually or through the control system, so that the angle α between the air outlet part 131 and the liquid level of the solution to be measured meets the first preset condition.

[0064] In some embodiments, when the fixture includes the rotating part 411, by adjusting the rotation angle of the rotating part 411, the angle α between the air outlet part 131 and the liquid level of the solution to be measured can be adjusted. Therefore, the air outlet part 131 and the air inlet part 132 can be integrated, that is, the materials of the air outlet part 131 and the air inlet part 132 can be the same.

[0065] In some embodiments, the fixture further includes an adjustment module for adjusting the distance d between the air outlet part 131 and the liquid level of the solution to be measured according to the actual distance to meet the second preset condition.

[0066] See Figure 4, the fixture further includes an adjustment module that can control the height of the vertical rod 420. In short, the adjustment module can control the vertical rod 420 to expand and contract, thereby causing the crossbar 410 to rise or fall, so that the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured can be adjusted. In some other embodiments, the adjustment module can control the crossbar 410 to slide on the vertical rod 420, so that the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured can be adjusted. Specifically, if the actual distance is too small, the adjustment module can control the crossbar 410 to rise, so that the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured satisfies the second preset condition; if the actual distance is too large, the adjustment module can control the crossbar 410 to fall, so that the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured satisfies the second preset condition.

[0067] In some embodiments, the control system can control the adjustment module according to the actual distance, and then control the distance between the air outlet portion 131 and the liquid surface of the solution to be measured to meet the second preset condition.

[0068] In some embodiments, the fixture is provided with a scale for indicating the rotation angle of the liquid blowing assembly 130.

[0069] See Figure 4 , the fixture includes a scale 413 for indicating the rotation angle of the liquid blowing assembly 130. The scale 413 is provided on both sides of the connection position between the rotating part 411 and the other part of the crossbar 410. Specifically, both sides of the connection position include a first part and a second part of the scale 413. The first part is used to indicate the angle, and the second part is used to point to the rotation angle of the liquid blowing assembly 130.

[0070] In some embodiments, when adjusting the angle α between the air outlet portion 131 and the liquid surface of the solution to be measured, the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured will change slightly. Specifically, when the included angle α varies within the range of 0° to 90°, if the angle α between the air outlet portion 131 and the liquid surface of the solution to be measured increases, the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured gradually decreases; if the angle α between the air outlet portion 131 and the liquid surface of the solution to be measured decreases, the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured gradually increases. When the included angle α varies within the range of 90° to 180°, if the angle α between the air outlet portion 131 and the liquid surface of the solution to be measured increases, the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured gradually increases; if the angle α between the air outlet portion 131 and the liquid surface of the solution to be measured decreases, the distance d between the air outlet portion 131 and the liquid surface of the solution to be measured gradually decreases. To avoid affecting the distance d when adjusting the angle α after adjusting the distance d first, thereby affecting the formation of eddy currents in the solution to be measured, the distance d can be adjusted after adjusting the angle α.

[0071] It should be noted that there are two included angles between the air outlet part 131 and the liquid level of the solution to be measured, and the sum of the two included angles is 180°. In practical applications, the included angle α between the air outlet part 131 and the liquid level of the solution to be measured specifically refers to the included angle between 0° and 90°.

[0072] In some embodiments, the fixture may further include a workbench 430, and the vertical rod may be fixed on the workbench 430, and the workbench 430 is used to place the reaction vessel 110.

[0073] Figure 5 Structural schematic of the fixture provided by the embodiment of the present disclosure Figure 2 。

[0074] See Figure 5 , the fixture includes a cross bar 510a and a cross bar 510b. The cross bar 510a includes a rotating part 511. The rotating part 511 includes a first jack 512 for clamping the liquid blowing assembly 130. The cross bar 510a also includes a scale 513 for indicating the rotation angle of the liquid blowing assembly 130. The scale 513 is arranged on both sides of the connection position between the rotating part 511 and other parts of the cross bar 510a. The rotation angle of the rotating part 511 can be manually adjusted or adjusted by the control system, so that the included angle α between the air outlet part 131 and the liquid level of the solution to be measured meets the first preset condition. The cross bar 510b includes a second jack 514 for clamping the burette 120 and a third jack 515 for clamping the electrode 140. The adjustment module can respectively adjust the heights of the cross bar 510a and the cross bar 510b. In this way, the burette 120 and the electrode 140 can be set at appropriate positions, and the distance d between the air outlet part 131 and the liquid level of the solution to be measured can also meet the second preset condition.

[0075] It should be noted that the cross bar 510a and the cross bar 510b are respectively vertically connected to the vertical rod 520, and the extending directions of the cross bar 510a and the cross bar 510b are parallel or intersecting.

[0076] In some embodiments, the second jack for clamping the burette 120 and the third jack for clamping the electrode 140 may be arranged on different cross bars.

[0077] Figure 6 Structural schematic of the fixture provided by the embodiment of the present disclosure Figure 3 。

[0078] See Figure 6, the fixture includes a cross bar 610 and a vertical bar 620 that are perpendicularly connected to each other. The cross bar 610 includes a rotating part 611. The rotating part 611 includes a first jack 612 for clamping the liquid blowing assembly 130. The cross bar 610 also includes a scale 613 for indicating the rotation angle of the liquid blowing assembly 130. The scale 613 is set on both sides of the connection position between the rotating part 611 and other parts of the cross bar 610. The rotation angle of the rotating part 611 can be adjusted manually or through a control system, so that the included angle α between the air outlet part 131 and the liquid level of the solution to be measured meets the first preset condition. On other parts of the cross bar 610, there are also a second jack 614 for clamping the burette 120 and a third jack 615 for clamping the electrode 140. The adjustment module can adjust the height of the cross bar 610, so that the distance d between the air outlet part 131 and the liquid level of the solution to be measured meets the second preset condition.

[0079] Figure 7 Structural schematic of the fixture provided by the embodiment of the present disclosure Figure 4 。

[0080] See Figure 7 , the fixture includes a cross bar 710 and a vertical bar 720 that are perpendicularly connected to each other. The cross bar 710 includes a rotating part 711. The rotating part 711 is arranged in the middle part of the cross bar 710. Therefore, there are two connection positions between the rotating part 711 and other parts of the cross bar 710. The rotating part 711 includes a first jack 712 for clamping the liquid blowing assembly 130. The cross bar 710 also includes a scale 713 for indicating the rotation angle of the liquid blowing assembly 130. The scale 713 is set on both sides of a certain connection position between the rotating part 711 and other parts of the cross bar 710. The rotation angle of the rotating part 711 can be adjusted manually or through a control system, so that the included angle α between the air outlet part 131 and the liquid level of the solution to be measured meets the first preset condition. On other parts of the cross bar 710, there are also a second jack 714 for clamping the burette 120 and a third jack 715 for clamping the electrode 140. The adjustment module can adjust the height of the cross bar 710, so that the distance d between the air outlet part 131 and the liquid level of the solution to be measured meets the second preset condition.

[0081] Figure 8 Structural schematic of the fixture provided by the embodiment of the present disclosure Figure 5 。

[0082] See Figure 8, the fixture includes crossbars 810a and 810b. The crossbar 810a is perpendicularly connected to the vertical bar 820a, and the crossbar 810b is perpendicularly connected to the vertical bar 820b. The crossbar 810a includes a rotating part 811. The rotating part 811 includes a first jack 812 for clamping the liquid blowing assembly 130. The crossbar 810a also includes a scale 813 for indicating the rotation angle of the liquid blowing assembly 130. The scale 813 is set on both sides of the connection position between the rotating part 811 and other parts of the crossbar 810a. The rotation angle of the rotating part 811 can be adjusted manually or through a control system, so that the included angle α between the air outlet part 131 and the liquid level of the solution to be measured meets the first preset condition. The crossbar 810b includes a second jack 814 for clamping the burette 120 and a third jack 815 for clamping the electrode 140. The adjustment module can adjust the heights of the crossbars 810a and 810b respectively. In this way, the burette 120 and the electrode 140 can be set at appropriate positions, and the distance d between the air outlet part 131 and the liquid level of the solution to be measured can also meet the second preset condition.

[0083] An embodiment of the present disclosure provides a titration device, including: a reaction vessel, and a burette, a liquid blowing assembly and an electrode arranged above the reaction vessel; the reaction vessel is used for containing the solution to be measured, and the burette is used for adding a titrant into the reaction vessel; the liquid blowing assembly includes an air outlet part, and the liquid blowing assembly is used for purging gas to the liquid level of the solution to be measured through the air outlet part, so as to make the titrant and the solution to be measured mix evenly; the electrode is immersed in the solution to be measured and is used for measuring the potential change of the solution to be measured to determine the titration end point. In the titration device provided by the embodiment of the present disclosure, the titrant and the solution to be measured are mixed by purging gas to the liquid level of the solution to be measured through the air outlet part, which can not only avoid damaging the electrode when stirring the solution to be measured, but also reduce the pollution brought by the liquid blowing assembly to the solution to be measured.

[0084] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, the "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present disclosure, the magnitudes of the serial numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present disclosure. The serial numbers of the embodiments of the present disclosure above are only for description and do not represent the advantages and disadvantages of the embodiments.

[0085] The above are only the preferred embodiments of the present disclosure, and do not limit the patent scope of the present disclosure. Any equivalent structural transformation made under the inventive concept of the present disclosure by using the content of the specification and drawings of the present disclosure, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present disclosure.

Claims

1. A titration device, characterized in that, Comprising: A reaction vessel, and a burette, a liquid blowing assembly and an electrode arranged above the reaction vessel; The reaction vessel is used for containing a solution to be measured, and the burette is used for adding a titrant into the reaction vessel; The liquid blowing assembly includes an air outlet part, and the liquid blowing assembly is used for purging gas to the liquid surface of the solution to be measured through the air outlet part so as to mix the titrant and the solution to be measured evenly; The electrode is immersed in the solution to be measured and is used for measuring the potential change of the solution to be measured to determine the titration end point.

2. The titration device according to claim 1, characterized in that, The included angle between the air outlet part and the liquid surface of the solution to be measured satisfies a first preset condition.

3. The titration device according to claim 2, characterized in that, The distance between the air outlet part and the liquid surface of the solution to be measured satisfies a second preset condition.

4. The titration device according to claim 1, characterized in that, The air outlet part is made of a deformable material.

5. The titration device according to claim 3, characterized in that, It further includes a clamp for fixing the liquid blowing assembly; The clamp includes a rotating part, and the rotating part is used for adjusting the included angle between the air outlet part and the liquid surface of the solution to be measured to satisfy the first preset condition.

6. The titration device according to claim 5, characterized in that, The liquid blowing assembly further includes a positioning module for measuring the measured distance between the positioning module and the liquid surface of the solution to be measured to obtain the actual distance between the air outlet part and the liquid surface of the solution to be measured.

7. The titration device according to claim 6, characterized in that, The clamp further includes an adjusting module for adjusting the distance between the air outlet part and the liquid surface of the solution to be measured according to the actual distance to satisfy the second preset condition.

8. The titration device according to claim 5, characterized in that, A scale for indicating the rotation angle of the liquid blowing assembly is provided on the clamp.

9. The titration device according to claim 1, characterized in that, The liquid blowing assembly further includes a controllable switch for controlling the gas flow rate.

10. The titration device according to claim 1, characterized in that, The liquid blowing assembly further includes a flowmeter for monitoring the gas flow rate.

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