CN218896063U

CN218896063U - PH meter

Info

Publication number: CN218896063U
Application number: CN202222922463.6U
Authority: CN
Inventors: 邢丽丽; 刘石林; 孙丽娜; 张立斌; 杨红生
Original assignee: Institute of Oceanology of CAS
Current assignee: Institute of Oceanology of CAS
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-04-21
Anticipated expiration: 2032-11-03

Abstract

The utility model belongs to the technical field of experimental equipment, in particular to a pH meter which comprises a main machine and a measuring electrode which are connected through a lead, and further comprises a folding supporting arm, a supporting seat, a motor, a driving gear, a driven gear connecting sleeve and a stirring rod. According to the utility model, through the cooperation arrangement of the motor, the driving gear, the driven gear connecting sleeve and the stirring rods, the motor shaft of the motor drives the driven gear to rotate around the driven gear connecting sleeve through the driving gear, so that each stirring rod rotates together with the driven gear, the liquid culture medium is automatically stirred, the mixing speed of the liquid culture medium can be improved, meanwhile, the pH value of the liquid culture medium can be detected in real time by the measuring electrode, and the preparation efficiency of the liquid culture medium is effectively improved. The measuring electrode, the driven gear connecting sleeve and the stirring rod are convenient to assemble and disassemble, simple in overall structure, convenient to clean and maintain and reliable to use.

Description

PH meter

Technical Field

The utility model belongs to the technical field of experimental equipment, and particularly relates to a pH meter.

Background

In scientific experiments, a liquid culture medium with a certain pH value is often required to be prepared for cell culture and the like, the pH value is required to be adjusted for multiple times, and a pH meter is generally adopted to measure the pH value. At present, in the process of preparing the liquid culture medium, the liquid culture medium in a container is sometimes required to be stirred and mixed evenly by a glass rod, so that after the internal components of the liquid culture medium are distributed evenly, whether the liquid culture medium reaches a proper pH value or not is detected by a pH meter. The manual stirring mode is adopted, so that the preparation time of the liquid culture medium is too long, and the time of an experimenter is greatly wasted.

Disclosure of Invention

Aiming at the problem that the configuration time is too long due to the fact that the pH value is detected after manual stirring is adopted in the process of preparing the liquid culture medium, the utility model aims to provide the pH meter with the stirring function.

The aim of the utility model is realized by the following technical scheme:

the pH meter comprises a main machine and a measuring electrode which are connected through a lead, and further comprises a folding supporting arm, a supporting seat, a motor, a driving gear, a driven gear connecting sleeve and a stirring rod;

one end of the folding support arm is connected with the shell of the host machine, the other end of the folding support arm is connected with the supporting seat, the motor is installed on the supporting seat, a motor shaft of the motor extends to the lower side of the supporting seat and is provided with the driving gear, the upper end of the driven gear connecting sleeve is connected with the supporting seat, the outer periphery of the lower end of the driven gear connecting sleeve extends outwards to form a limit flange, the driven gear is sleeved on the driven gear connecting sleeve between the limit flange and the bottom surface of the supporting seat, the driven gear is meshed with the driving gear, the bottom surface of the driven gear is connected with a plurality of upper ends of stirring rods, the lower ends of the stirring rods are respectively provided with a stirring part, the upper parts of the measuring electrodes are arranged on the supporting seat, the lower parts of the measuring electrodes are measuring ends, and the measuring ends of the measuring electrodes penetrate through the supporting seat and the driven gear connecting sleeve and extend to the lower side of the supporting seat.

The outer peripheral surface of the upper part of the measuring electrode is convexly provided with a supporting baffle edge, and the supporting baffle edge is abutted to the top surface of the supporting seat.

The top surface of the supporting seat of the periphery of the supporting baffle edge is convexly provided with an annular bulge, and the size of the outer peripheral surface of the supporting baffle edge is matched with the size of the inner peripheral surface of the annular bulge.

The bottom surface of the supporting seat is respectively provided with a motor shaft penetrating pore canal and a connecting pore canal, the motor shaft penetrating pore canal is used for enabling the motor shaft of the motor to penetrate, and the connecting pore canal is connected with the upper end of the driven gear connecting sleeve through threads.

The length direction of the stirring rod is parallel to the length direction of the measuring electrode.

The upper end of the stirring rod is connected with the bottom surface of the driven gear through threads.

The stirring part at the lower end of the stirring rod is square.

The stirring rods are arranged in a plurality, each stirring rod is uniformly arranged on the outer side of the measuring electrode along the circumferential direction, and the stirring parts of each stirring rod are arranged on one side far away from the measuring electrode.

The folding support arm is divided into a connecting arm A and a connecting arm B, one end of the connecting arm A is connected with the shell of the host through a damping rotating shaft, the other end of the connecting arm A is connected with one end of the connecting arm B through a damping rotating shaft, and the other end of the connecting arm B is connected with the supporting seat through a damping rotating shaft.

The length of the connecting arm B is longer than that of the connecting arm A.

The utility model has the advantages and positive effects that:

1. according to the utility model, through the cooperation arrangement of the motor, the driving gear, the driven gear connecting sleeve and the stirring rods, the motor shaft of the motor drives the driven gear to rotate around the driven gear connecting sleeve through the driving gear, so that each stirring rod rotates together with the driven gear, the liquid culture medium is automatically stirred, the mixing speed of the liquid culture medium can be improved, meanwhile, the pH value of the liquid culture medium can be detected in real time by the measuring electrode, and the preparation efficiency of the liquid culture medium is effectively improved.

2. The measuring electrode, the driven gear connecting sleeve and the stirring rod are convenient to assemble and disassemble, simple in overall structure, convenient to clean and maintain and reliable to use.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is an enlarged view at B of FIG. 1;

fig. 4 is a schematic structural view of the stirring rod of the present utility model.

In the figure: the device comprises a main machine 1, a measuring electrode 2, a supporting baffle edge 201, a folding supporting arm 3, a connecting arm A301, a connecting arm B302, a supporting seat 4, an annular bulge 401, a motor 5, a driving gear 6, a driven gear 7, a driven gear connecting sleeve 8, a gear limiting flange 801, a stirring rod 9 and a stirring part 901.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The pH meter comprises a main machine 1 and a measuring electrode 2 which are connected through wires, and further comprises a folding supporting arm 3, a supporting seat 4, a motor 5, a driving gear 6, a driven gear 7, a driven gear connecting sleeve 8 and a stirring rod 9. In this embodiment, the motor 5 is a commercially available miniature motor product, the motor 5 is controlled to start and stop by a control switch installed on the host 1, the motor 5 and the host 1 are powered by an external power supply, and the setting mode of the control switch and the connection mode of the control switch and the external power supply are both in the prior art. In this embodiment, the main body setting structures and connection modes of the host 1 and the measuring electrode 2 all adopt the prior art, and the numerical value measured by the measuring electrode 2 can be displayed through the display screen of the host 1.

One end of the folding support arm 3 is connected with the shell of the host machine 1, the other end is connected with the supporting seat 4, the motor 5 is arranged on the supporting seat 4, a motor shaft of the motor 5 extends to the lower side of the supporting seat 4 and is provided with the driving gear 6, the upper end of the driven gear connecting sleeve 8 is connected with the supporting seat 4, the outer periphery of the lower end of the driven gear connecting sleeve 8 extends to the outer side to form a limit flange 801, the driven gear 7 is sleeved on the driven gear connecting sleeve 8 between the limit flange 801 and the bottom surface of the supporting seat 4, the limit flange 801 plays a role of supporting the driven gear 7, the driven gear 7 is meshed with the driving gear 6, the bottom surface of the driven gear 7 is connected with the upper ends of a plurality of stirring rods 9, the lower ends of the stirring rods 9 are all provided with stirring parts 901, the upper parts of the measuring electrodes 2 are arranged on the supporting seat 4, the lower parts of the measuring electrodes 2 are measuring ends, and the measuring ends of the measuring electrodes 2 penetrate through the supporting seat 4 and the driven gear connecting sleeve 8 and extend to the lower side of the supporting seat 4.

Specifically, as shown in fig. 3, in this embodiment, a support rib 201 is protruded on the outer peripheral surface of the upper portion of the measuring electrode 2, and the support rib 201 abuts against the top surface of the support base 4. The top surface of the supporting seat 4 on the outer periphery of the supporting baffle edge 201 is convexly provided with an annular protrusion 401, and the outer peripheral surface dimension of the supporting baffle edge 201 is matched with the inner peripheral surface dimension of the annular protrusion 401. The support rim 201 serves to support the measuring electrode 2 on the support base 4. The setting of annular protruding 401 for when installing measuring electrode 2, support keeps off along 201 can conveniently and stably fix a position on supporting seat 4, makes the plug between measuring electrode 2 and the supporting seat 4 be connected conveniently, and convenient to detach measuring electrode 2 clear up the change.

Specifically, as shown in fig. 1, in this embodiment, a motor shaft penetrating hole and a connecting hole are respectively formed on the bottom surface of the supporting seat 4, the motor shaft penetrating hole is used for penetrating the motor shaft of the motor 5, and the connecting hole is connected with the upper end of the driven gear connecting sleeve 8 through threads. Namely, the driven gear connecting sleeve 8 is connected with the supporting seat 4 through threads, and the driven gear connecting sleeve 8 can be conveniently disassembled and assembled.

Specifically, as shown in fig. 1 and 4, in the present embodiment, a plurality of stirring rods 9 are provided, and each stirring rod 9 is uniformly provided on the outer side of the measuring electrode 2 in the circumferential direction. The length direction of each stirring rod 9 is parallel to the length direction of the measuring electrode 2. The stirring portion 901 at the lower end of each stirring rod 9 is square, and the stirring portion 901 of each stirring rod 9 is provided on a side away from the measuring electrode 2. By providing the square stirring portion 901, the liquid culture medium in the container can pass through the through hole in the middle of the square stirring portion 901 during stirring, the stirring effect can be increased, and the intensity of stirring can be reduced compared with a solid stirring paddle. The upper ends of the stirring rods 9 are connected with the bottom surface of the driven gear 7 through threads, and the assembly and the disassembly are convenient. The stirring rod 9 with a proper size of the stirring part 901 can be replaced according to containers with different sizes.

Specifically, as shown in fig. 1, in this embodiment, the folding support arm 3 is divided into a connection arm a301 and a connection arm B302, one end of the connection arm a301 is connected with the housing of the host 1 through a damping rotating shaft, the other end is connected with one end of the connection arm B302 through a damping rotating shaft, and the other end of the connection arm B302 is connected with the support seat 4 through a damping rotating shaft. The connection arms A301 and B302 can be arbitrarily adjusted in the height and position of extension, and the support base 4 can be reliably supported. The length of the connecting arm B302 is longer than that of the connecting arm A301, so that a user can conveniently grasp the connecting arm B302 to adjust the position of the supporting seat 4, and interference with the position of the host 1 is avoided. The specific installation arrangement of the folding support arm 3 in this embodiment adopts the prior art.

Working principle:

the folding support arm 3 is adjusted so that the measuring end at the lower part of the measuring electrode 2 and the stirring part 901 at the lower end of each stirring rod 9 respectively extend into the liquid culture medium in the container; the motor 5 is started, the motor shaft of the motor 5 drives the driven gear 7 to rotate around the driven gear connecting sleeve 8 through the driving gear 6, so that each stirring rod 9 rotates together with the driven gear 7 to automatically stir the liquid culture medium, the mixing speed of the liquid culture medium can be improved, meanwhile, the pH value of the liquid culture medium can be detected by the measuring electrode 2 in real time, and the preparation efficiency of the liquid culture medium is effectively improved; after stirring for a certain time, stopping the motor 5, and observing whether the pH value measured at the moment meets the requirement after the liquid culture medium is gradually stabilized; if the measured pH value meets the requirement, the measuring electrode 2 and each stirring rod 9 can be taken out from the container to finish preparation; if the measured pH value does not meet the requirement, the reagent for adjusting the pH value can be continuously added into the liquid culture medium in the container, the motor 5 is restarted for stirring, then the motor 5 is stopped for detection, and the operation is repeated until the measured pH value meets the requirement.

Claims

1. A pH meter, characterized by: comprises a main machine (1) and a measuring electrode (2) which are connected through a lead, and also comprises a folding supporting arm (3), a supporting seat (4), a motor (5), a driving gear (6), a driven gear (7), a driven gear connecting sleeve (8) and a stirring rod (9);

one end of the folding support arm (3) is connected with the shell of the host computer (1), the other end of the folding support arm is connected with the supporting seat (4), the motor (5) is installed on the supporting seat (4), a motor shaft of the motor (5) extends to the lower side of the supporting seat (4) and is installed with the driving gear (6), the upper end of the driven gear connecting sleeve (8) is connected with the supporting seat (4), a limit flange (801) extends outwards from the periphery of the lower end of the driven gear connecting sleeve (8), the driven gear (7) is sleeved on the driven gear connecting sleeve (8) between the limit flange (801) and the bottom surface of the supporting seat (4), the driven gear (7) is meshed with the driving gear (6), a plurality of upper ends of stirring rods (9) are connected to the bottom surface of the driven gear (7), stirring parts (901) are arranged at the lower ends of the stirring rods (9), the upper parts of the measuring electrodes (2) are arranged on the supporting seat (4), the measuring electrodes (2) extend to the lower ends of the supporting seat (4), and the measuring electrodes (4) extend to the lower ends of the measuring electrodes (4).

2. The pH meter of claim 1, wherein: the outer peripheral surface of the upper part of the measuring electrode (2) is convexly provided with a supporting baffle edge (201), and the supporting baffle edge (201) is abutted to the top surface of the supporting seat (4).

3. The pH meter of claim 2, wherein: the top surface of the supporting seat (4) on the periphery of the supporting baffle edge (201) is convexly provided with an annular bulge (401), and the outer peripheral surface size of the supporting baffle edge (201) is matched with the inner peripheral surface size of the annular bulge (401).

4. The pH meter of claim 1, wherein: the bottom surface of the supporting seat (4) is respectively provided with a motor shaft penetrating pore canal and a connecting pore canal, the motor shaft penetrating pore canal is used for enabling the motor shaft of the motor (5) to penetrate, and the connecting pore canal is connected with the upper end of the driven gear connecting sleeve (8) through threads.

5. The pH meter of claim 1, wherein: the length direction of the stirring rod (9) is parallel to the length direction of the measuring electrode (2).

6. The pH meter of claim 1, wherein: the upper end of the stirring rod (9) is connected with the bottom surface of the driven gear (7) through threads.

7. The pH meter of claim 1, wherein: the stirring part (901) at the lower end of the stirring rod (9) is square.

8. The pH meter of claim 7, wherein: the stirring rods (9) are provided with a plurality of stirring rods (9), the stirring rods (9) are uniformly arranged on the outer side of the measuring electrode (2) along the circumferential direction, and stirring parts (901) of the stirring rods (9) are arranged on one side far away from the measuring electrode (2).

9. The pH meter of claim 1, wherein: the folding support arm (3) is divided into a connection arm A (301) and a connection arm B (302), one end of the connection arm A (301) is connected with the shell of the host machine (1) through a damping rotating shaft, the other end of the connection arm A is connected with one end of the connection arm B (302) through a damping rotating shaft, and the other end of the connection arm B (302) is connected with the support seat (4) through a damping rotating shaft.

10. The pH meter of claim 9, wherein: the length of the connecting arm B (302) is longer than the length of the connecting arm A (301).