Centrifuge drum positioning device

Abstract

The present invention is a centrifuge drum positioning device, including a cylinder, a second gear plate, and a rotating rod; the telescopic rod of the cylinder is connected to a slider, a motor is arranged on the slider, the output shaft of the motor is connected to a first gear plate, and the first gear plate and the second gear plate are meshed; a rotating disk is fixedly sleeved on the rotating rod, six positioning notches and a limiting notch are arranged on the circumference of the rotating disk, the rotating rod is non-contactly sleeved with a support plate, the cylinder and the support plate are both fixed on the centrifuge cover; two position sensors are fixed on the support plate, namely a first position sensor and a second position sensor. The present invention can return the drum of a randomly stopped centrifuge to its original position, facilitates automated integration, and enables automated addition and sampling of centrifuge tubes in the centrifuge without manual operation, is suitable for dust-free and sterile operation, improves work efficiency, and avoids the harm of harmful reagents to people.

Description

Technical Field

[0001] The invention relates to the technical field of experimental instruments and meters, and in particular to a centrifuge drum positioning device. Background Art

[0002] A centrifuge is a machine that uses centrifugal force to separate liquids from solid particles or components in a mixture of liquids and liquids. Centrifuges are mainly used to separate solid particles from liquids in suspensions, or to separate two immiscible liquids of different densities in emulsions, such as separating cream from milk; some sedimentation centrifuges can also classify solid particles by density or particle size, taking advantage of the different sedimentation speeds of solid particles of different densities or particle sizes in liquids. Centrifuges are commonly used in laboratories and are now widely used in industries such as chemicals, petroleum, food, pharmaceuticals, mineral processing, coal, water treatment, and shipping.

[0003] The drum refers to the rotating part in equipment such as centrifuges and gas flow meters, also known as drums. The drum in the centrifuge is connected to the centrifuge tube rack and drives the centrifuge tube rack to rotate under the action of the motor.

[0004] After the centrifuge stops working, the drum will continue to rotate under its own inertia, resulting in the final stop position of the drum after centrifugation being random, which is not convenient for automated integration. As a result, the addition and sampling of centrifuge tubes in the centrifuge have not been automated and require manual operation. When the samples of experimental scientific research are dangerous goods that are harmful to humans, manual operation poses a safety hazard. The existing centrifuge has the defect that the drum cannot be limited at the final stop position after centrifugation.

[0005] Therefore, a centrifuge drum positioning device is designed to solve the above problems. Summary of the invention

[0006] In order to overcome the above shortcomings, the present invention provides a centrifuge drum positioning device, comprising a cylinder, a second gear plate, and a rotating rod;

[0007] The telescopic rod of the cylinder is connected to a slider, a motor is arranged on the slider, an output shaft of the motor is connected to a first gear plate, the first gear plate is meshed with the second gear plate, the second gear plate corresponds to the center position of the centrifuge tube rack of the centrifuge, and the top center plug of the rotating rod is inserted into the center of the second gear plate;

[0008] A rotating disk is fixedly sleeved on the rotating rod, and six positioning notches and one limiting notch are provided on the circumference of the rotating disk. The positioning notches are equally arranged, and the positioning notches correspond to the centrifuge tubes on the centrifuge tube rack of the centrifuge one by one. The limiting notch is located between two of the positioning notches and close to one of the positioning notches;

[0009] The rotating rod is non-contactly sleeved with a support plate, and the cylinder and the support plate are both fixed on the centrifuge cover; two position sensors are fixed on the support plate, namely a first position sensor and a second position sensor, and the first position sensor and the second position sensor are connected to the motor electrical signal; the distance between the first position sensor and the second position sensor is the same as the distance between the limit gap and a positioning gap that is adjacent but far away; when the upper and lower positions of the first position sensor and the limit gap correspond, and at the same time, the second position sensor corresponds to the upper and lower positions of a positioning gap that is adjacent to but far away from the limit gap, the motor stops working.

[0010] The beneficial effects of the present invention are:

[0011] The centrifuge drum positioning device described in the present invention can return the randomly stopped centrifuge drum to its original position, which is convenient for automated integration, so that the adding and sampling of centrifuge tubes in the centrifuge can be automated without manual operation, is suitable for dust-free and sterile operation, improves work efficiency, and avoids the harm of harmful reagents to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A perspective view of the present invention;

[0013] Figure 2 It is a front view of the present invention;

[0014] Figure 3 It is a connection diagram of the cylinder, the slider, the motor and the first gear plate;

[0015] Figure 4 It is a connection diagram excluding the cylinder, the slider, the motor and the first gear plate;

[0016] Figure 5 A stereogram of a turntable;

[0017] Figure 6 is a top view of the turntable;

[0018] Figure 7 The use state of the present invention Figure 1 ;

[0019] Figure 8 The use state of the present invention Figure 2 ;

[0020] Fig. 9 The use state of the present invention Figure 3 ;

[0021] in:

[0022] 1-cylinder; 2-slider; 3-motor; 4-first gear plate; 5-second gear plate; 6-turntable; 61-positioning notch; 62-limiting notch; 7-turn rod; 8-support plate; 9-first position sensor; 10-second position sensor; DETAILED DESCRIPTION

[0023] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings.

[0024] A centrifuge drum positioning device, comprising a cylinder 1, a second gear plate 5, and a rotating rod 7;

[0025] The telescopic rod of the cylinder 1 is connected to a slider 2, a motor 3 is arranged on the slider 2, an output shaft of the motor 3 is connected to a first gear plate 4, the first gear plate 4 is meshed with the second gear plate 5, and the second gear plate 5 corresponds to the center position of the centrifuge tube rack of the centrifuge;

[0026] The center plug on the top surface of the rotating rod 7 is inserted into the center of the second gear plate 5. A rotating disk 6 is fixedly sleeved on the rotating rod 7. Six positioning notches 61 and a limiting notch 62 are provided on the circumference of the rotating disk 6. The positioning notches 61 are equally divided. The positioning notches 61 correspond to the centrifuge tubes on the centrifuge tube rack of the centrifuge one by one. The limiting notch 62 is located between two positioning notches 61 and close to one of the positioning notches 61.

[0027] The rotating rod 7 is non-contactly sleeved with a support plate 8, and the cylinder 1 and the support plate 8 are both fixed on the centrifuge cover; two position sensors are fixed on the support plate 8, namely a first position sensor 9 and a second position sensor 10, and the first position sensor 9 and the second position sensor 10 are connected to the electrical signal of 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 limit notch 62 and a positioning notch 61 that is adjacent but far away; when the upper and lower positions of the first position sensor 9 and the limit notch 62 correspond, and at the same time, the second position sensor 10 corresponds to the upper and lower positions of a positioning notch 61 that is adjacent to but far away from the limit notch 62, the motor 3 stops working.

[0028] Directions:

[0029] The rotary drum is fixedly connected to the centrifuge rack, and returning the centrifuge tube rack to its original position will return the rotary drum to its original position.

[0030] When the centrifuge's drum needs to be returned to its original position, the cylinder 1 pushes the motor 3 by the slider 2 to approach the second gear plate 5, the motor 3 is started, the second gear plate 5 is meshed with the first gear plate 4, the motor 3 drives the first gear plate 4 to rotate, the first gear plate 4 drives the second gear plate 5 to rotate, the second gear plate 5 drives the rotating rod 7 to rotate, the rotating rod 7 rotates and drives the rotating disk 6 to rotate, when the limiting notch 62 on the rotating disk 6 and a positioning notch 61 adjacent to but far from the limiting notch 62 correspond to the upper and lower positions of the first position sensor 9 and the second position sensor 10 respectively, the first position sensor 9 and the second position sensor 10 send signals to the motor 3, the motor 3 stops working, and the drum returns to its original position.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A centrifuge drum positioning device, characterized in that: It comprises a cylinder (1), a second gear plate (5), and a rotating rod (7); The telescopic rod of the cylinder (1) is connected to a slider (2), the slider (2) is provided with a motor (3), the output shaft of the motor (3) is connected to a first gear plate (4), the first gear plate (4) and the second gear plate (5) are meshed, and the second gear plate (5) corresponds to the center position of a centrifuge tube rack of the centrifuge; The center plug on the top surface of the rotating rod (7) is inserted into the center of the second gear plate (5); a rotating disk (6) is fixedly sleeved on the rotating rod (7); six positioning notches (61) and one limiting notch (62) are provided on the circumference of the rotating disk (6); the positioning notches (61) are arranged in equal parts; the positioning notches (61) correspond to the centrifuge tubes on the centrifuge tube rack of the centrifuge one by one; the limiting notch (62) is located between two of the positioning notches (61) and close to one of the positioning notches (61); The rotating rod (7) is non-contactly sleeved with a support plate (8), and the cylinder (1) and the support plate (8) are both fixed on the centrifuge cover; two position sensors are fixed on the support plate (8), namely a first position sensor (9) and a second position sensor (10), and the first position sensor (9) and the second position sensor (10) are connected to the motor (3) by electrical signals; the distance between the first position sensor (9) and the second position sensor (10) is the same as the distance between the limit notch (62) and a positioning notch (61) adjacent to but far away; when the upper and lower positions of the first position sensor (9) and the limit notch (62) correspond, and at the same time, the upper and lower positions of the second position sensor (10) and the positioning notch (61) adjacent to but far away from the limit notch (62) correspond, the motor (3) stops working.

Images