CN112295754A - Centrifuge drum locating device - Google Patents

Abstract

The invention relates to a position finding device for a rotary drum of a centrifugal machine, which comprises a cylinder, a second gear wheel disc and a rotary rod; the telescopic rod of the air cylinder is connected with a sliding block, a motor is arranged on the sliding block, an output shaft of the motor is connected with a first gear disc, and the first gear disc is meshed with the second gear disc; the rotating rod is fixedly sleeved with a turntable, six positioning notches and one limiting notch are formed in the periphery of the turntable, the rotating rod is sleeved with a supporting plate in a non-contact mode, and the air cylinder and the supporting plate are both fixed on a centrifuge cover; two position sensors, namely a first position sensor and a second position sensor, are fixed on the supporting plate. The invention can reset the rotating drum of the centrifuge which stays at random, is convenient for automatic integration, can realize automation of sample adding and sampling of the centrifuge tube in the centrifuge, does not need manual operation, is suitable for dust-free sterile operation, improves the working efficiency, and refuges harmful reagents to human.

Description

Centrifuge drum locating device

Technical Field

The invention relates to the technical field of experimental instruments and meters, in particular to a centrifuge drum locating device.

Background

Centrifuges are machines that utilize centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid. The centrifuge is mainly used for separating solid particles from liquid in suspension, or separating two liquids which have different densities and are insoluble with each other in emulsion, such as cream separated from milk; some settling centrifuges can also grade solid particles according to density or granularity by utilizing the characteristic that solid particles with different densities or granularities have different settling speeds in liquid. Centrifuges are commonly used in laboratories and are now widely used in chemical, petroleum, food, pharmaceutical, mineral separation, coal, water treatment, and marine industries.

The rotary drum is a rotating part in equipment such as a centrifuge, a gas flowmeter and the like, and is also called a rolling barrel, and the rotary drum in the centrifuge is connected with a centrifuge tube rack and drives the centrifuge tube rack to rotate under the action of a motor.

Centrifuge is after the stop work, the rotary drum can continue to rotate under self inertial action, it is random to lead to centrifuge to carry out the last stop position of rotary drum behind the centrifugal work, the automatic integration of being not convenient for, cause the application of sample of centrifuging tube among the centrifuge and sample and do not realize automaticly always, need manual operation, when the sample of experiment scientific research is the hazardous articles harmful to the people, there is the potential safety hazard in manual operation, current centrifuge has last stop position can not spacing defect at the rotary drum after carrying out centrifugal work.

Therefore, the centrifuge drum locating device is designed to solve the problems.

Disclosure of Invention

The invention provides a centrifuge drum locating device for overcoming the defects, which comprises a cylinder, a second gear wheel disc and a rotating rod, wherein the cylinder is arranged on the second gear wheel disc;

the telescopic rod of the air cylinder is connected with a sliding block, a motor is arranged on the sliding block, an output shaft of the motor is connected with a first gear disc, the first gear disc is meshed with a second gear disc, the second gear disc corresponds to the center of a centrifuge tube rack of the centrifuge, and a top surface center plug of the rotating rod is inserted into the center of the second gear disc;

the rotating rod is fixedly sleeved with a rotating disc, six positioning notches and a limiting notch are formed in the periphery of the rotating disc, the positioning notches are arranged in equal parts, the positioning notches correspond to centrifuge tubes on a centrifuge tube rack of the centrifuge one by one, and the limiting notch is located between the two positioning notches and is close to one of the positioning notches;

the rotating rod is sleeved with a supporting plate in a non-contact mode, and the air cylinder and the supporting plate are fixed on a centrifuge cover; two position sensors are fixed on the supporting plate and respectively comprise a first position sensor and a second position sensor, and the first position sensor and the second position sensor are connected with an electric signal of the motor; the distance between the first position sensor and the second position sensor is the same as that between the limiting notch and the adjacent positioning notch which is far away from the limiting notch; when the first position sensor corresponds to the upper position and the lower position of the limiting notch, and the second position sensor corresponds to the upper position and the lower position of a positioning notch which is adjacent to the limiting notch but far away from the limiting notch, the motor stops working.

The invention has the beneficial effects that:

the centrifuge drum locating device can be used for homing the randomly stopped centrifuge drums, is convenient for automatic integration, can realize automation of sample adding and sampling of centrifuge tubes in the centrifuge, does not need manual operation, is suitable for dust-free and sterile operation, improves the working efficiency, and refuges harmful reagents to human.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic connection diagram of the cylinder, the slider, the motor and the first gear plate;

FIG. 4 is a schematic view of the connections except for the cylinder, the slide block, the motor, and the first gear plate;

FIG. 5 is a perspective view of the turntable;

FIG. 6 is a top view of the turntable;

FIG. 7 is a first usage state diagram of the present invention;

FIG. 8 is a second state diagram of the present invention;

FIG. 9 is a third state diagram of the present invention;

wherein:

1-a cylinder; 2-a slide block; 3, a motor; 4-a first gear wheel; 5-a second gear wheel disc; 6, rotating a disc; 61-a positioning notch; 62-limiting gap; 7-rotating the rod; 8-a support plate; 9-a first position sensor; 10-a second position sensor;

Detailed Description

The following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

A position finding device for a rotary drum of a centrifugal machine comprises a cylinder 1, a second gear wheel disc 5 and a rotary rod 7;

the telescopic rod of the cylinder 1 is connected with a sliding block 2, a motor 3 is arranged on the sliding block 2, an output shaft of the motor 3 is connected with a first gear disc 4, the first gear disc 4 is meshed with a second gear disc 5, and the second gear disc 5 corresponds to the center of a centrifuge tube rack of a centrifuge;

the top surface center plug of the rotating rod 7 is inserted into the center of the second gear wheel disc 5, the rotating rod 7 is fixedly sleeved with a rotating disc 6, six positioning notches 61 and a limiting notch 62 are formed in the peripheral side of the rotating disc 6, the positioning notches 61 are arranged in equal parts, the positioning notches 61 correspond to centrifuge tubes on a centrifuge tube rack of a centrifuge one by one, and the limiting notch 62 is located between the two positioning notches 61 and is close to one notch 61;

the rotating rod 7 is sleeved with a supporting plate 8 in a non-contact mode, and the air cylinder 1 and the supporting plate 8 are fixed on a centrifuge cover; two position sensors, namely a first position sensor 9 and a second position sensor 10 are fixed on the supporting plate 8, and the first position sensor 9 and the second position sensor 10 are electrically connected with the motor 3; the distance between the first position sensor 9 and the second position sensor 10 is the same as the distance between the limiting notch 62 and the adjacent positioning notch 61 which is far away; when the first position sensor 9 corresponds to the upper and lower positions of the position-limiting notch 62, and the second position sensor 10 corresponds to the upper and lower positions of a positioning notch 61 adjacent to the position-limiting notch 62 but far away from the position-limiting notch, the motor 3 stops working.

The using method comprises the following steps:

the rotary drum is fixedly connected with the centrifugal rack, and the rotary drum is returned by returning the centrifugal pipe rack.

When the rotary drum of the centrifuge needs to be reset, the air cylinder 1 pushes the motor 3 to be close to the second gear disc 5 by the slide block 2, the motor 3 is started to enable the second gear disc 5 to be meshed with the first gear disc 4, the motor 3 drives the first gear disc 4 to rotate, the first gear disc 4 drives the second gear disc 5 to rotate, the second gear disc 5 drives the rotating rod 7 to rotate, the rotating rod 7 rotates to drive the rotating disc 6 to rotate, the limiting notch 62 on the rotating disc 6 and the positioning notch 61 adjacent to but far away from the limiting notch 62 respectively correspond to the upper position and the lower position of the first position sensor 9 and the second position sensor 10, the first position sensor 9 and the second position sensor 10 send signals to the motor 3, the motor 3 stops working, and the rotary drum is reset at the moment,

in the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (1)

1. A position finding device for a rotary drum of a centrifugal machine is characterized by comprising a cylinder (1), a second gear wheel disc (5) and a rotating rod (7);

the telescopic rod of the air cylinder (1) is connected with a sliding block (2), a motor (3) is arranged on the sliding block (2), an output shaft of the motor (3) is connected with a first gear disc (4), the first gear disc (4) is meshed with a second gear disc (5), and the second gear disc (5) corresponds to the center of a centrifuge tube rack of a centrifuge;

the top surface center plug of the rotating rod (7) is inserted into the center of the second gear wheel disc (5), the rotating rod (7) is fixedly sleeved with a rotating disc (6), six positioning notches (61) and one limiting notch (62) are formed in the peripheral side of the rotating disc (6), the positioning notches (61) are arranged in equal parts, the positioning notches (61) correspond to centrifuge tubes on a centrifuge tube rack of a centrifuge one by one, and the limiting notches (62) are located between the two positioning notches (61) and are close to one of the positioning notches (61);

the rotating rod (7) is sleeved with a supporting plate (8) in a non-contact mode, and the air cylinder (1) and the supporting plate (8) are fixed on a centrifuge cover; two position sensors, namely a first position sensor (9) and a second position sensor (10), are fixed on the supporting plate (8), and the first position sensor (9) and the second position sensor (10) are connected with the motor (3) through electric signals; the distance between the first position sensor (9) and the second position sensor (10) is the same as the distance between the limiting notch (62) and the adjacent positioning notch (61) which is far away; when the first position sensor (9) corresponds to the upper position and the lower position of the limiting notch (62), and the second position sensor (10) corresponds to the upper position and the lower position of a positioning notch (61) which is adjacent to the limiting notch (62) but is far away from the limiting notch (62), the motor (3) stops working.

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