Auxiliary door opening mechanism of liquid chromatograph

Abstract

The utility model relates to the technical field of automation equipment, and discloses an auxiliary door opening mechanism of a liquid chromatograph, double front doors are arranged in front of a body of the liquid chromatograph, rotating shafts are respectively arranged on two sides of positions, close to door shafts of the front double doors, above the body, and the rotating shafts are driven by steering engines arranged above the rotating shafts. The rotating shaft is connected with a first connecting rod arm, the first connecting rod arm is rotationally connected with a second connecting rod arm, the first connecting rod arm is an L-shaped crank arm, the corner of the crank arm is located on the outer side of a front door, the front end of the second connecting rod arm is rotationally connected to a bonding block of the front door, and the steering engine is connected to the control unit. The control unit controls the steering engine to drive the rotating shaft to rotate, the rotating shaft drives the first connecting rod arm and the second connecting rod arm to rotate relatively, and the front door is opened or closed. The crank arm rotating door opening mechanism is arranged above the front door of the chromatographic instrument, so that the front door of the chromatographic instrument is opened or closed by rotating the crank arm through electric control.

Description

An auxiliary door opening mechanism for a liquid chromatograph Technical Field

[0001] This utility model relates to the field of automation equipment technology, and in particular to an auxiliary door opening mechanism for a liquid chromatograph. Background Technology

[0002] Liquid chromatography (LC) separates chemical sample solutions based on the different partition coefficients between the stationary and mobile phases, which cause them to migrate at different speeds within the chromatographic column. As a mature instrument, LC is widely used in laboratories.

[0003] During the automation transformation of the laboratory, the manual operation of the liquid chromatograph needs to be completed by robots or robotic arms, which places high demands on the robots and robotic arms and will increase the cost of the product line.

[0004] For branded liquid chromatographs, such as Agilent, there is no interface for opening and closing the door and related operations. Summary of the Invention

[0005] The purpose of this invention is to solve the above problems and provide an auxiliary door opening mechanism for a liquid chromatograph. By setting a crank arm rotation door opening mechanism above the front door of the chromatograph, the crank arm rotation is electrically controlled to open or close the front door of the chromatograph.

[0006] The technical solution adopted by this utility model is:

[0007] An auxiliary door opening mechanism for a liquid chromatograph, wherein the liquid chromatograph body is provided with a double front door, characterized in that, on both sides of the door hinge above the body near the double front doors, a rotating shaft is respectively provided, the rotating shaft is driven by a servo motor provided above it, a first connecting arm is connected to the rotating shaft, and a second connecting arm is rotatably connected to the first connecting arm, the first connecting arm being an L-shaped curved arm with its rotation angle located outside the front door, the front end of the second connecting arm being rotatably connected to an adhesive block of the front door, the servo motor being connected to a control unit, the control unit controlling the servo motor to drive the rotating shaft to rotate, the rotating shaft driving the first and second connecting arms to rotate relative to each other, thereby opening or closing the front door.

[0008] Furthermore, a sensor is provided on the front door, and a micro switch is provided at the front end of the main body. The micro switch is connected to the control unit, and the control unit determines the open or closed state of the front door based on the state of the micro switch.

[0009] Furthermore, a button is provided on the upper part of the main body. The button is connected to the control unit. When the button is pressed, the control unit controls the servo to change the opening or closing state of the front door.

[0010] Furthermore, the adhesive block is provided with a height equalization screw, and the second connecting arm is connected to the height equalization screw through a rotation mechanism.

[0011] Furthermore, the upper end of the equal-height screw is higher than the top of the front door.

[0012] Furthermore, the adhesive block is provided with multiple screw holes, which are arranged along the upper edge of the front door, and are used to adjust the position of the equal-height screws.

[0013] Furthermore, the rotation angle of the first linkage arm is an obtuse angle of less than 100 degrees.

[0014] The beneficial effects of this utility model are:

[0015] (1) Automatic door opening and closing operation after sample delivery is achieved through automatic control by the control unit;

[0016] (2) The articulated linkage arm makes the opening and closing of the door smoother and more in line with the rhythm of traditional manual door opening and closing;

[0017] (3) The doors can be opened and closed on both sides and can be manually controlled, providing implementation schemes for various experimental scenarios. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of this utility model installed on a chromatograph;

[0019] Figure 2 is a partial enlarged view of the door opening mechanism (closed state);

[0020] Figure 3 is a partial enlarged view of the door opening mechanism (open state);

[0021] Figure 4 is a schematic diagram of the door opening mechanism on the left side;

[0022] Figure 5 is a schematic diagram of the door opening mechanism on the right side;

[0023] Figure 6 is a simplified diagram of the crank arm rotation principle.

[0024] The labels in the attached diagram are as follows:

[0025] 1. Liquid chromatograph; 2. Door opening mechanism;

[0026] 3. Front door; 4. Hinge;

[0027] 5. Servo motor; 6. First linkage arm;

[0028] 7. Second link arm; 8. Equal height screw;

[0029] 9. Screw hole; 10. Induction plate;

[0030] 11. Micro switch; 12. Button;

[0031] 13. Adhesive block. Detailed Implementation

[0032] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific implementation of an auxiliary door opening mechanism for a liquid chromatograph according to this invention.

[0033] Referring to Figures 1 to 5, the door opening mechanism 2 of the liquid chromatograph 1 is located on both sides of the main body of the chromatograph's dual front doors 3. Rotating shafts 4 are respectively installed on both sides of the main body near the door hinges of the dual front doors 3. The rotating shafts 4 are driven by servo motors 5 mounted above them. A first connecting rod arm 6 is connected to the rotating shaft 4, and a second connecting rod arm 7 is rotatably connected to the first connecting rod arm 6. An adhesive block 13 is installed at the upper end of the front door 3, and the adhesive block 13 is fixed to the outer side of the upper end of the front door 3. The second connecting rod arm 7 is rotatably connected to the adhesive block 13.

[0034] Specifically, the first linkage arm 6 is an L-shaped articulated arm, with its turning angle located outside the front door 3. The turning angle is an obtuse angle slightly greater than 90 degrees, such as 95 degrees. The second linkage arm 7 is rotatably connected to the first linkage arm 6. The entire door opening mechanism 2 is controlled by a PLC control unit. According to user instructions, the control unit controls the servo motor 5, thereby driving the first linkage arm 6 to rotate, which in turn drives the second linkage arm 7 to rotate, causing the front door 3 to open or close.

[0035] A height-adjusting screw 8 is provided on the adhesive block 13. The second connecting arm 7 is connected to the height-adjusting screw 8 via a rotating mechanism. The upper end of the height-adjusting screw 8 is higher than the top of the front door 3. This ensures that the entire door opening mechanism 2 is positioned above the double front doors 3, preventing interference during rotation. Multiple screw holes 9 are provided on the adhesive block 13, arranged along the upper edge of the front door 3. These screw holes 9 are used to adjust the position of the height-adjusting screw 8. Adjusting the position of the height-adjusting screw 8 according to the opening degree of the front door 3 changes the rotation position and angle of the first connecting arm 6 and the second connecting arm 7.

[0036] A sensor 10 is installed on the front door 3, and a micro switch 11 is installed at the front end of the main body. The micro switch 11 is connected to the control unit, and the control unit determines the open or closed state of the front door 3 according to the state of the micro switch 11.

[0037] A button 12 is located on the top of the main body. The button 12 is connected to the control unit. When the button 12 is pressed, the control unit controls the servo motor 5 to change the open or closed state of the front door 3. That is, when the front door 3 is in the open state, pressing the button 12 will perform the door opening action, and when the front door 3 is in the closed state, it will perform the door closing action.

[0038] Referring to Figure 6, the principle of the door opening mechanism 2 of this patent can be simplified as shown in the simplified diagram in Figure 6. When the first linkage arm 6 rotates, it drives the second linkage arm 7 to rotate, thereby driving the front door 3 to rotate, thus realizing the opening and closing of the door.

[0039] Referring to Figure 5, both front doors 3 of this patent are implemented using the same door opening mechanism 2. Through the control unit, the two front doors 3 can be opened and closed simultaneously or separately.

[0040] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An auxiliary door opening mechanism for a liquid chromatograph, wherein the liquid chromatograph body is provided with two front doors, characterized in that: On both sides of the door hinges near the front double doors above the main body, there are rotating shafts. The rotating shafts are driven by servo motors located above them. A first linkage arm is connected to the rotating shaft, and a second linkage arm is rotatably connected to the first linkage arm. The first linkage arm is an L-shaped curved arm, and the corner of the curved arm is located outside the front door. The front end of the second linkage arm is rotatably connected to the adhesive block of the front door. The servo motor is connected to a control unit, and the control unit controls the servo motor to drive the rotating shaft to rotate. The rotating shaft drives the first linkage arm and the second linkage arm to rotate relative to each other, so that the front door opens or closes.

2. The auxiliary door opening mechanism for a liquid chromatograph according to claim 1, characterized in that: A sensor is installed on the front door, and a micro switch is installed at the front end of the main body. The micro switch is connected to the control unit, and the control unit determines the open or closed state of the front door based on the state of the micro switch.

3. The auxiliary door opening mechanism for a liquid chromatograph according to claim 2, characterized in that: A button is located on the top of the main body. The button is connected to the control unit. When the button is pressed, the control unit controls the servo to change the opening or closing state of the front door.

4. An auxiliary door opening mechanism for a liquid chromatograph according to any one of claims 1 to 3, characterized in that: The adhesive block is provided with a height equalization screw, and the second connecting arm is connected to the height equalization screw through a rotation mechanism.

5. The auxiliary door opening mechanism for a liquid chromatograph according to claim 4, characterized in that: The upper end of the equal-height screw is higher than the top of the front door.

6. The auxiliary door opening mechanism for a liquid chromatograph according to claim 4, characterized in that: The adhesive block is provided with multiple screw holes, which are arranged along the upper edge of the front door. These screw holes are used to adjust the position of the equalization screws.

7. An auxiliary door opening mechanism for a liquid chromatograph according to any one of claims 1 to 3, characterized in that: The first linkage arm has an obtuse angle of less than 100 degrees.

Images