Laboratory pH meter fixing frame convenient to use

Abstract

The utility model relates to a laboratory pH meter fixing frame convenient to use, which belongs to the technical field of laboratory equipment and comprises a bottom plate, a pH meter body and a base are respectively and fixedly mounted on the upper side of the bottom plate, a mounting frame is arranged above the pH meter body and the base, a measuring electrode is fixedly mounted on the lower side of the mounting frame, and the pH meter body and the base are fixedly mounted on the mounting frame. A lifting mechanism is arranged between the mounting frame and the pH meter body, a stirring mechanism is arranged on the outer side of the measuring electrode, and a positioning mechanism is arranged on the base; the positioning mechanism comprises a first motor fixedly installed on the outer side of the base, a two-way lead screw is fixedly installed on an output shaft of the first motor, and the outer side of the two-way lead screw is in threaded connection with two threaded sleeves. According to the pH meter fixing frame convenient to use for the laboratory, fixing of a measuring cup is achieved, the situation that the measuring cup topples over due to too large stirring force is avoided, using is convenient, using stability is improved, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory equipment, in particular to a pH meter fixing rack that is easy to use in a laboratory. Background Art

[0002] A pH meter is an instrument used to measure the pH value of a solution. It works on the principle of a galvanic cell. The electromotive force between the two electrodes of a galvanic cell is based on the Nernst law, which is related to both the properties of the electrodes themselves and the concentration of hydrogen ions in the solution. There is a corresponding relationship between the electromotive force of the galvanic cell and the concentration of hydrogen ions. The negative logarithm of the concentration of hydrogen ions is the pH value. A pH meter is a common analytical instrument, widely used in laboratories in the fields of agriculture, environmental protection, and industry.

[0003] Patent No. CN215311773U in the prior art discloses a pH meter fixing stand that is easy to use in the laboratory, including a structural base, a threaded column, a sliding rod, a reduction stepping motor, a first bearing, a first horizontal plate, a second horizontal plate, a motor, a stirring rod, a groove, a second bearing, a rotating shaft, an electromagnet, an iron plate and an electrode clamping groove; the fixing stand has an ingenious structure, and the electrode clamping mechanism contains a motor and a stirring rod, which can stir the solution when the solution is prepared, and stir the solution that has been standing for a long time, and there is no need to manually adjust the height of the electrode, and the function is diverse. The second horizontal plate of the electrode clamping mechanism can be flipped by the cooperation of the rotating shaft and the bearing, and the second horizontal plate is fixed by an electromagnet. The operation is convenient and simple, which is conducive to popularization and use.

[0004] Although the above device can stir the solution when in use, it lacks the function of fixing the measuring cup containing the solution, resulting in the measuring cup being tipped over due to the stirring force when the solution inside the measuring cup is stirred, affecting the smooth progress of the experiment and causing inconvenience to the use. Therefore, a pH meter fixing stand that is easy to use in the laboratory is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a pH meter fixing stand that is easy to use in the laboratory, which has the advantages of being easy to fix a measuring cup, etc., and solves the problem that the pH meter fixing stand that is easy to use in the laboratory in the prior art lacks the function of fixing the measuring cup containing the solution when in use, resulting in the measuring cup being tipped over due to the stirring force when the solution inside the measuring cup is stirred, thus affecting the smooth progress of the experiment and causing inconvenience to the user.

[0006] To achieve the above object, the utility model provides the following technical solutions: a pH meter fixing stand for use in a laboratory, comprising a bottom plate, a pH meter body and a base are fixedly mounted on the upper side of the bottom plate, a mounting stand is arranged above the pH meter body and the base, a measuring electrode is fixedly mounted on the lower side of the mounting stand, a lifting mechanism is arranged between the mounting stand and the pH meter body, a stirring mechanism is arranged on the outer side of the measuring electrode, and a positioning mechanism is arranged on the base;

[0007] The positioning mechanism includes a first motor fixedly mounted on the outside of the base, a bidirectional screw rod fixedly mounted on the output shaft of the first motor, two threaded sleeves are threadedly connected to the outside of the bidirectional screw rod, connecting rods are fixedly connected to the upper sides of the two threaded sleeves, and clamping plates are fixedly connected to the upper ends of the two connecting rods.

[0008] Furthermore, the lifting mechanism includes an electric push rod and a guide rod, and the electric push rod and the guide rod are both fixedly mounted on the top of the pH meter body, and the mounting frame is fixedly connected to the output shaft of the electric push rod.

[0009] Furthermore, the stirring mechanism includes a second motor fixedly mounted on the bottom of the mounting frame, the second motor is drivingly connected to a circular ring, and a stirring rod is fixedly connected to the bottom of the circular ring.

[0010] Furthermore, the bidirectional screw is located inside the base, the two threaded sleeves are respectively located on the threads at both ends of the bidirectional screw that are arranged in opposite directions to each other, and the end of the bidirectional screw away from the first motor is connected to the inner wall of the base through a bearing.

[0011] Furthermore, a slider is fixedly connected to the lower side of the threaded sleeve, a guide rail is fixedly installed inside the base, and the slider is slidably connected to the inner side of the guide rail.

[0012] Furthermore, two strip-shaped openings are provided on the upper surface of the base, and the two connecting rods respectively penetrate the inner sides of the two strip-shaped openings. The outer shape of the clamping plate is arc-shaped, and the two clamping plates are arranged corresponding to each other.

[0013] Furthermore, a sliding sleeve is fixedly connected to the outer side of the mounting frame, and the sliding sleeve is movably sleeved on the outer wall of the guide rod.

[0014] Furthermore, a main gear is fixedly mounted on the output shaft of the second motor, a slave gear is fixedly connected to the outer side of the ring, the main gear is meshed with the slave gear, the ring is sleeved on the outer side of the measuring electrode, and the ring and the measuring electrode are connected through a bearing.

[0015] Compared with the prior art, the utility model provides a pH meter fixing stand for use in a laboratory, which has the following beneficial effects:

[0016] 1. The easy-to-use pH meter fixing stand for the laboratory is used. A measuring cup filled with a solution to be tested is placed on a base, and a first motor is started to drive a bidirectional screw rod to rotate, so that the two threaded sleeves are driven to move toward each other, and then the two clamping plates are driven to move toward each other, so that the two clamping plates can be close to each other to clamp and fix the measuring cup, thereby fixing the measuring cup and avoiding tipping of the measuring cup due to excessive stirring force, facilitating use, improving stability of use, and having high practicality.

[0017] 2. The laboratory uses an easy-to-use pH meter bracket. By starting the second motor, the main gear and the slave gear are driven to rotate, and the ring is driven to rotate along the outer wall of the measuring electrode, thereby driving the stirring rod to rotate. The stirring rod is used to stir the solution to be tested in the measuring cup to ensure its uniform composition, avoid precipitation, and improve the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the stirring mechanism of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the clamping plate of the utility model.

[0021] In the figure: 1. bottom plate; 2. pH meter body; 3. mounting bracket; 4. measuring electrode; 5. measuring cup; 6. base; 7. first motor; 8. bidirectional screw rod; 9. threaded sleeve; 10. slider; 11. guide rail; 12. connecting rod; 13. clamping plate; 14. electric push rod; 15. guide rod; 16. sliding sleeve; 17. second motor; 18. main gear; 19. slave gear; 20. ring; 21. stirring rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 In this embodiment, a pH meter fixing bracket for easy use in the laboratory includes a bottom plate 1, on the upper side of which a pH meter body 2 and a base 6 are fixedly mounted, a mounting bracket 3 is arranged above the pH meter body 2 and the base 6, and a measuring electrode 4 is fixedly mounted on the lower side of the mounting bracket 3, and the measuring electrode 4 is electrically connected to the pH meter body 2.

[0024] It should be noted that the base 6 is located directly below the measuring electrode 4 . The base 6 is used to place the measuring cup 5 . When the measuring cup 5 is placed on the base 6 , the measuring electrode 4 is located directly above the measuring cup 5 .

[0025] In this embodiment, a positioning mechanism is provided on the base 6, and the positioning mechanism includes a first motor 7 fixedly mounted on the outside of the base 6, and a bidirectional screw rod 8 is fixedly mounted on the output shaft of the first motor 7. The outer side of the bidirectional screw rod 8 is threadedly connected to two threaded sleeves 9, and the upper sides of the two threaded sleeves 9 are fixedly connected to connecting rods 12, and the upper ends of the two connecting rods 12 are fixedly connected to clamping plates 13, and the outer shape of the clamping plates 13 is arc-shaped, and the two clamping plates 13 are arranged corresponding to each other.

[0026] Among them, the bidirectional screw rod 8 is located inside the base 6, and the two threaded sleeves 9 are respectively located on the two end threads of the bidirectional screw rod 8 which are set opposite to each other. The end of the bidirectional screw rod 8 away from the first motor 7 is connected to the inner wall of the base 6 through a bearing.

[0027] It should be supplemented that a slider 10 is fixedly connected to the lower side of the threaded sleeve 9, a guide rail 11 is fixedly installed inside the base 6, and the slider 10 is slidably connected to the inner side of the guide rail 11. In addition, two strip openings are opened on the upper surface of the base 6, and two connecting rods 12 respectively pass through the inner sides of the two strip openings. The shape of the clamping plate 13 is arc-shaped, and the two clamping plates 13 are arranged corresponding to each other.

[0028] In this embodiment, a lifting mechanism is arranged between the mounting frame 3 and the pH meter body 2, and the lifting mechanism includes an electric push rod 14 and a guide rod 15. The electric push rod 14 and the guide rod 15 are both fixedly mounted on the top of the pH meter body 2, and the mounting frame 3 is fixedly connected to the output shaft of the electric push rod 14.

[0029] The outer side of the mounting frame 3 is fixedly connected with a sliding sleeve 16 , and the sliding sleeve 16 is movably sleeved on the outer wall of the guide rod 15 .

[0030] In this embodiment, a stirring mechanism is provided on the outer side of the measuring electrode 4, and the stirring mechanism includes a second motor 17 fixedly installed on the bottom of the mounting frame 3, and the second motor 17 is transmission-connected to a ring 20, and a stirring rod 21 is fixedly connected to the bottom of the ring 20. There are two stirring rods 21, and the two stirring rods 21 are respectively located on the left and right sides of the measuring electrode 4.

[0031] Among them, a main gear 18 is fixedly installed on the output shaft of the second motor 17, and a slave gear 19 is fixedly connected to the outer side of the ring 20. The main gear 18 is meshed with the slave gear 19. The ring 20 is sleeved on the outer side of the measuring electrode 4, and the ring 20 and the measuring electrode 4 are connected through a bearing.

[0032] The working principle of the above embodiment is:

[0033] When the utility model is in use, a measuring cup 5 filled with a solution to be tested is placed on a base 6, and the first motor 7 is started to drive the bidirectional screw 8 to rotate, so that the two threaded sleeves 9 are driven to move toward each other, and then the two clamping plates 13 are driven to move toward each other, so that the two clamping plates 13 can be close to each other to clamp and fix the measuring cup 5, and then the electric push rod 14 is started to drive the mounting frame 3 to move downward, so that the measuring electrode 4 is downwardly contacted with the solution to be tested in the measuring cup 5, so as to facilitate the determination of the pH value of the solution. In addition, the second motor 17 is started to drive the main gear 18 and the slave gear 19 to rotate, and the ring 20 is driven to rotate along the outer wall of the measuring electrode 4, thereby driving the stirring rod 21 to rotate, and the stirring rod 21 is used to stir the solution to be tested in the measuring cup 5 to ensure that its composition is uniform and to avoid precipitation.

[0034] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical methods, and they can be implemented as long as they can achieve their beneficial effects. In addition, the electrical components appearing in the text are all electrically connected to the main controller and the power supply. The main controller is a conventional known device, and there is an existing disclosed power connection technology. Therefore, the text will not go into too much detail on its specific structural composition and working principle.

[0035] It should be noted that in this article, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pH meter fixing stand for use in a laboratory, comprising a bottom plate (1), a pH meter body (2) and a base (6) being fixedly mounted on the upper side of the bottom plate (1), a mounting stand (3) being arranged above the pH meter body (2) and the base (6), and a measuring electrode (4) being fixedly mounted on the lower side of the mounting stand (3), characterized in that: A lifting mechanism is provided between the mounting frame (3) and the pH meter body (2), a stirring mechanism is provided on the outer side of the measuring electrode (4), and a positioning mechanism is provided on the base (6); The positioning mechanism comprises a first motor (7) fixedly mounted on the outside of a base (6); a bidirectional screw rod (8) is fixedly mounted on the output shaft of the first motor (7); two threaded sleeves (9) are threadedly connected to the outside of the bidirectional screw rod (8); the upper sides of the two threaded sleeves (9) are fixedly connected to connecting rods (12); and the upper ends of the two connecting rods (12) are fixedly connected to clamping plates (13).

2. A convenient-to-use pH meter fixing stand for laboratory use according to claim 1, characterized in that: The lifting mechanism comprises an electric push rod (14) and a guide rod (15), wherein the electric push rod (14) and the guide rod (15) are both fixedly mounted on the top of the pH meter body (2), and the mounting frame (3) is fixedly connected to the output shaft of the electric push rod (14).

3. A convenient-to-use pH meter fixing stand for laboratory use according to claim 1, characterized in that: The stirring mechanism comprises a second motor (17) fixedly mounted on the bottom of the mounting frame (3); the second motor (17) is drivingly connected to a circular ring (20); and a stirring rod (21) is fixedly connected to the bottom of the circular ring (20).

4. The pH meter fixing stand for use in a laboratory according to claim 1, characterized in that: The bidirectional screw rod (8) is located inside the base (6), and the two threaded sleeves (9) are respectively located on the threads at both ends of the bidirectional screw rod (8) that are arranged in opposite directions to each other. The end of the bidirectional screw rod (8) away from the first motor (7) is connected to the inner wall of the base (6) through a bearing.

5. The pH meter fixing stand for use in a laboratory according to claim 1, characterized in that: A slider (10) is fixedly connected to the lower side of the threaded sleeve (9), a guide rail (11) is fixedly installed inside the base (6), and the slider (10) is slidably connected to the inner side of the guide rail (11).

6. The pH meter fixing stand for use in a laboratory according to claim 1, characterized in that: The upper surface of the base (6) is provided with two strip-shaped openings, and the two connecting rods (12) respectively penetrate the inner sides of the two strip-shaped openings. The outer shape of the clamping plate (13) is arc-shaped, and the two clamping plates (13) are arranged corresponding to each other.

7. The easy-to-use pH meter fixing stand for laboratory use according to claim 2, characterized in that: A sliding sleeve (16) is fixedly connected to the outer side of the mounting frame (3), and the sliding sleeve (16) is movably sleeved on the outer wall of the guide rod (15).

8. The easy-to-use pH meter fixing stand for laboratory use according to claim 3, characterized in that: A main gear (18) is fixedly mounted on the output shaft of the second motor (17); a slave gear (19) is fixedly connected to the outer side of the circular ring (20); the main gear (18) and the slave gear (19) are meshed; the circular ring (20) is sleeved on the outer side of the measuring electrode (4), and the circular ring (20) and the measuring electrode (4) are connected via a bearing.

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