A universal syringe holder for automatic chromatography detection

Abstract

The present invention relates to a universal syringe clamp for automatic chromatographic detection, which is used for clamping syringes, and includes a connecting component, an automatic measuring bracket, an adjustable pressure cylinder, a clamping claw and a positioning support plate. The automatic measuring bracket is connected to the connecting component to control the extension distance of the syringe piston; the fixed end of the adjustable pressure cylinder is fixedly connected to the automatic measuring bracket, the clamping claw includes a movable claw and a fixed claw, the movable claw is fixedly connected to the movable end of the adjustable pressure cylinder, the fixed claw is fixedly connected to the fixed end of the adjustable pressure cylinder, and a syringe clamping area is surrounded between the movable claw and the fixed claw; the positioning support plate includes a fixed support plate and a movable support plate, the fixed support plate is fixedly connected to the fixed end of the adjustable pressure cylinder, the movable support plate is fixedly connected to the movable end of the adjustable pressure cylinder, and a syringe positioning area is surrounded between the fixed support plate and the movable support plate claw. The clamp of the present invention has high stability and strong versatility, and belongs to the technical field of syringe clamps.

Description

Technical Field

[0001] The invention belongs to the technical field of syringe clamps, and in particular relates to a universal syringe clamp for automatic chromatographic detection. Background Art

[0002] In order to cooperate with the gas chromatography automatic robot detection and realize the transfer between different workstations, a universal syringe clamp is designed to be compatible with syringes of various specifications and ensure versatility and clamping reliability.

[0003] In actual operation, when clamping the syringe, since the syringe is made of glass, there is a large deviation in its external dimensions, and the traditional rigid clamp cannot achieve accurate clamping, which affects the effect of automatic oil and gas injection operations; at the same time, according to the detection requirements of different oil products, the clamp design needs to take into account the needs of different air intake volumes and have an automatic adjustment function. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a universal syringe clamp for automatic chromatographic detection, which solves the problem that in actual operation, when clamping the syringe, the traditional rigid clamp cannot achieve accurate clamping because the syringe is a glass product and its external dimensions have large deviations, thus affecting the effect of automatic oil and gas injection operations; at the same time, according to the detection requirements of different oil products, the clamp design needs to take into account the requirements of different air intake volumes and have an automatic adjustment function.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A universal syringe clamp for automatic chromatographic detection is used to clamp the syringe, comprising a connecting component, an automatic measuring bracket, an adjustable pressure cylinder, a clamping jaw and a positioning support plate, wherein the automatic measuring bracket is connected to the connecting component to control the extension distance of the syringe piston; the fixed end of the adjustable pressure cylinder is fixedly connected to the automatic measuring bracket, the clamping jaw comprises a movable jaw and a fixed jaw, the movable jaw is fixedly connected to the movable end of the adjustable pressure cylinder, the fixed jaw is fixedly connected to the fixed end of the adjustable pressure cylinder, and a syringe clamping area is formed between the movable jaw and the fixed jaw; the positioning support plate comprises a fixed support plate and a movable support plate, the fixed support plate is fixedly connected to the fixed end of the adjustable pressure cylinder, the movable support plate is fixedly connected to the movable end of the adjustable pressure cylinder, and a syringe positioning area is formed between the fixed support plate and the movable support plate jaws.

[0007] As a preferred embodiment, the automatic measuring bracket includes a servo motor, a slide rail, a lead screw, a sliding block, a control rod and a mounting frame. The mounting frame and the connecting component are fixedly connected, the servo motor is fixed on the mounting frame, the slide rail is fixed on the mounting frame, the lead screw and the output end of the servo motor are fixedly connected, the sliding block and the lead screw are threadedly connected, the sliding block and the slide rail are slidably connected, the control rod and the sliding block are fixedly connected, and the fixed end of the adjustable pressure cylinder is fixedly connected to the mounting frame.

[0008] As a preference, the control rod comprises a connecting section, an inclined section and a bending section, the connecting section, the inclined section and the bending section are connected in sequence, the connecting section and the sliding block are fixedly connected, and the bending section is arranged toward the clamping area.

[0009] As a preferred embodiment, the cross sections of the connecting section, the inclined section and the bent section are all circular.

[0010] As a preferred embodiment, the movable claw includes a first connecting block, a first auxiliary positioning block and a first clamping block. The first connecting block is fixedly connected to the movable end of the adjustable pressure cylinder by bolts, the first clamping block and the first connecting block are fixedly connected, the first auxiliary positioning block is located on one side of the first clamping block, the first auxiliary positioning block and the first connecting block are fixedly connected, and the first auxiliary positioning block is provided with a first contact step, which is used to cooperate with the syringe slot to limit the movement of the syringe.

[0011] As a preferred embodiment, the fixed claw and the movable claw are arranged opposite to each other, the fixed claw includes a second connecting block, a second auxiliary positioning block and a second clamping block, the second connecting block is fixedly connected to the fixed end of the adjustable pressure cylinder by bolts, the second clamping block and the second connecting block are fixedly connected, the second auxiliary positioning block is located on one side of the second clamping block, the second auxiliary positioning block and the second connecting block are fixedly connected, the second auxiliary positioning block is provided with a second contact step, and the second contact step is used to cooperate with the syringe slot to limit the movement of the syringe.

[0012] As a preferred embodiment, the movable support plate and the fixed support plate are arranged relative to each other, and the movable support plate includes a first connecting plate and a first positioning support plate, the first connecting plate is fixedly connected to the movable end of the adjustable pressure cylinder by bolts, and the first positioning support plate and the first connecting plate are fixedly connected.

[0013] As a preference, the fixed support plate includes a second connecting plate and a second positioning support plate, the second connecting plate is fixedly connected to the fixed end of the adjustable pressure cylinder by bolts, and the second positioning support plate and the second connecting plate are fixedly connected.

[0014] As a preferred embodiment, the first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate have the same structure, and the first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate are all composed of two bent clamping blocks, and the two bent clamping blocks are V-shaped.

[0015] As a preferred embodiment, the connecting component is a rectangular plate, the bottom end of which is fixedly connected to the mounting frame by screws, and the top end of the rectangular plate is provided with a threaded hole, which is used to fix the three-axis manipulator or the six-degree-of-freedom robot to the rectangular plate.

[0016] In general, the present invention has the following advantages:

[0017] The present invention can reduce the instability of clamping and the degree of damage to the syringe. It has strong versatility and ensures the clamping effect of multiple sizes. The fixture is designed with an automatic measuring bracket to adapt to syringes of different ranges; the extension length of the control rod is adjusted by a servo motor, so as to adjust the oil injection amount by controlling the extension distance of the syringe piston; the action flow of the control rod movement can be designed according to the test process, and the functions of evacuating bubbles and releasing the back slide can be realized by pushing the syringe piston to move; at the same time, by calculating the number of motor rotations, the movement distance of the syringe piston can be calculated, and the volume of liquid in the syringe can be measured. It can be installed at the end of a three-coordinate robot or a six-degree-of-freedom robot, and is suitable for different robot operations, with strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a three-dimensional diagram of a universal syringe clamp for automatic chromatography detection when clamping a syringe.

[0019] Figure 2 It is a three-dimensional diagram of the connection between the movable claw and the movable support plate.

[0020] Among them, 1 is a syringe, 2 is a syringe piston, 3 is a clamping claw, 4 is a positioning support plate, 5 is an adjustable pressure cylinder, 6 is a servo motor, 7 is a connecting component, 8 is a slide rail, 9 is a lead screw, 10 is a control rod, 11 is a displacement sensor, 12 is a movable claw, 13 is a movable support plate, and 14 is a first auxiliary positioning block. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0022] like Figure 1-2As shown, a universal syringe clamp for automatic chromatographic detection is used to clamp the syringe, including a connecting component, an automatic measuring bracket, an adjustable pressure cylinder, a clamping claw and a positioning support plate. The automatic measuring bracket and the connecting component are connected to control the extension distance of the syringe piston; the fixed end of the adjustable pressure cylinder is fixedly connected to the automatic measuring bracket, the clamping claw includes a movable claw and a fixed claw, the movable claw is fixedly connected to the movable end of the adjustable pressure cylinder, the fixed claw is fixedly connected to the fixed end of the adjustable pressure cylinder, and the movable claw and the fixed claw form a syringe clamping area; the positioning support plate includes a fixed support plate and a movable support plate, the fixed support plate is fixedly connected to the fixed end of the adjustable pressure cylinder, the movable support plate is fixedly connected to the movable end of the adjustable pressure cylinder, and the fixed support plate and the movable support plate claw form a syringe positioning area. In this embodiment, the clamping claw can be made elastic by adjusting the pressure of the adjustable pressure cylinder, and the glass surface of the syringe can be buffered and protected by a slot.

[0023] The automatic measuring bracket includes a servo motor, a slide rail, a lead screw, a sliding block, a control rod and a mounting frame. The mounting frame and the connecting parts are fixedly connected. The servo motor is fixed on the mounting frame, the slide rail is fixed on the mounting frame, the lead screw and the output end of the servo motor are fixedly connected, the sliding block and the lead screw are threadedly connected, the sliding block and the slide rail are slidably connected, the control rod and the sliding block are fixedly connected, and the fixed end of the adjustable pressure cylinder is fixedly connected to the mounting frame.

[0024] The control rod comprises a connecting section, an inclined section and a bending section, the connecting section, the inclined section and the bending section are connected in sequence, the connecting section and the sliding block are fixedly connected, and the bending section is arranged toward the clamping area.

[0025] The cross sections of the connecting section, the inclined section and the bent section are all circular.

[0026] The movable claw includes a first connecting block, a first auxiliary positioning block and a first clamping block, the first connecting block is fixedly connected to the movable end of the adjustable pressure cylinder through a bolt, the first clamping block is fixedly connected to the first connecting block, the first auxiliary positioning block is located on one side of the first clamping block, the first auxiliary positioning block is fixedly connected to the first connecting block, and the first auxiliary positioning block is provided with a first contact step, the first contact step is used to cooperate with the syringe slot to limit the movement of the syringe. The first contact step can position the syringe slot to effectively prevent the syringe from slipping.

[0027] The fixed claw and the movable claw are arranged opposite to each other, and the fixed claw includes a second connecting block, a second auxiliary positioning block and a second clamping block. The second connecting block is fixedly connected to the fixed end of the adjustable pressure cylinder through a bolt, the second clamping block is fixedly connected to the second connecting block, the second auxiliary positioning block is located on one side of the second clamping block, the second auxiliary positioning block is fixedly connected to the second connecting block, and the second auxiliary positioning block is provided with a second contact step, which is used to cooperate with the syringe slot to limit the movement of the syringe.

[0028] The movable support plate and the fixed support plate are arranged opposite to each other. The movable support plate includes a first connecting plate and a first positioning support plate. The first connecting plate is fixedly connected to the movable end of the adjustable pressure cylinder through bolts, and the first positioning support plate is fixedly connected to the first connecting plate.

[0029] The fixed support plate includes a second connecting plate and a second positioning support plate. The second connecting plate is fixedly connected to the fixed end of the adjustable pressure cylinder through bolts, and the second positioning support plate is fixedly connected to the second connecting plate.

[0030] The first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate have the same structure. The first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate are all composed of two bent clamping blocks, and the two bent clamping blocks are V-shaped.

[0031] The connecting component is a rectangular plate, the bottom of which is fixedly connected to the mounting frame by screws, and the top of which is provided with a threaded hole for fixing the three-axis manipulator or the six-degree-of-freedom robot to the rectangular plate.

[0032] In this embodiment, the servo motor is provided with a speed detection sensor, which monitors the motor speed. The end of the bending section and the syringe contacting is provided with a force sensor, which measures the thrust and sets different pushing lengths. The syringe piston is provided with a displacement sensor, which cooperates with the force sensor to measure the thrust, and the two are measured synchronously to improve accuracy. The electronic components and electrical appliances of this embodiment are electrically connected to the external power supply through wires. The cylinder is connected to an external air pipe for air supply.

[0033] Usage process: During operation, the robot drives the syringe clamp to move to the syringe taking position.

[0034] After the clamp moves into place, the movable claw and the fixed claw approach to clamp the target syringe; during the clamping process, the elastic structure on the clamp gradually contacts the outer wall of the syringe to ensure that the corresponding contact steps and the slots are accurately aligned and clamped in the center.

[0035] After the syringe is clamped, the automatic measuring bracket starts to move, the servo motor rotates, and the control rod on the slide block moves. A force sensor is installed at the end of the control rod, which stops moving after contacting the syringe piston, and the volume of the syringe can be calculated by measuring the piston length.

[0036] During the oil injection process of the syringe, the piston is pushed outward, and the force sensor detects the thrust size in real time; when there is thrust, the servo motor drives the sliding block to move, and the control rod extends outward synchronously; when the piston stops moving, the thrust is zero and the servo motor stops moving; at this time, the piston length is measured and the volume of injected oil can be calculated.

[0037] During the oil discharge process of the syringe, the servo motor drives the control rod to retract, thereby pushing the piston into the syringe to discharge the oil.

[0038] After the operation is completed, the robot places the syringe on the tray, opens the gripper, and completes the operation.

[0039] In the gas injection process, the clamp action and function are the same. The clamp of the syringe and the volume inside the syringe can be measured.

[0040] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A universal syringe clamp for automatic chromatography detection, used for clamping a syringe, characterized by: It includes a connecting component, an automatic measuring bracket, an adjustable pressure cylinder, a clamping claw and a positioning support plate. The automatic measuring bracket is connected to the connecting component to control the extension distance of the syringe piston; the fixed end of the adjustable pressure cylinder is fixedly connected to the automatic measuring bracket, the clamping claw includes a movable claw and a fixed claw, the movable claw is fixedly connected to the movable end of the adjustable pressure cylinder, the fixed claw is fixedly connected to the fixed end of the adjustable pressure cylinder, and a syringe clamping area is surrounded by the movable claw and the fixed claw; the positioning support plate includes a fixed support plate and a movable support plate, the fixed support plate is fixedly connected to the fixed end of the adjustable pressure cylinder, the movable support plate is fixedly connected to the movable end of the adjustable pressure cylinder, and a syringe positioning area is surrounded by the fixed support plate and the movable support plate claws; The automatic measuring bracket includes a servo motor, a slide rail, a lead screw, a sliding block, a control rod and a mounting frame, the mounting frame and the connecting component are fixedly connected, the servo motor is fixed on the mounting frame, the slide rail is fixed on the mounting frame, the lead screw and the output end of the servo motor are fixedly connected, the sliding block and the lead screw are threadedly connected, the sliding block and the slide rail are slidably connected, the control rod and the sliding block are fixedly connected, and the fixed end of the adjustable pressure cylinder is fixedly connected to the mounting frame; The control rod comprises a connecting section, an inclined section and a bending section, the connecting section, the inclined section and the bending section are connected in sequence, the connecting section is fixedly connected to the sliding block, and the bending section is arranged toward the clamping area; The cross sections of the connecting section, the inclined section and the bent section are all circular.

2. A universal syringe holder for automatic chromatography detection according to claim 1, characterized in that: The movable claw includes a first connecting block, a first auxiliary positioning block and a first clamping block. The first connecting block is fixedly connected to the movable end of the adjustable pressure cylinder through a bolt, the first clamping block and the first connecting block are fixedly connected, the first auxiliary positioning block is located on one side of the first clamping block, the first auxiliary positioning block and the first connecting block are fixedly connected, and the first auxiliary positioning block is provided with a first contact step, which is used to cooperate with the syringe slot to limit the movement of the syringe.

3. A universal syringe holder for automatic chromatography detection according to claim 2, characterized in that: The fixed claw and the movable claw are arranged opposite to each other, and the fixed claw includes a second connecting block, a second auxiliary positioning block and a second clamping block. The second connecting block is fixedly connected to the fixed end of the adjustable pressure cylinder through a bolt, the second clamping block is fixedly connected to the second connecting block, the second auxiliary positioning block is located on one side of the second clamping block, the second auxiliary positioning block is fixedly connected to the second connecting block, and the second auxiliary positioning block is provided with a second contact step, which is used to cooperate with the syringe slot to limit the movement of the syringe.

4. A universal syringe holder for automatic chromatography detection according to claim 3, characterized in that: The movable support plate and the fixed support plate are arranged opposite to each other. The movable support plate includes a first connecting plate and a first positioning support plate. The first connecting plate is fixedly connected to the movable end of the adjustable pressure cylinder through bolts, and the first positioning support plate is fixedly connected to the first connecting plate.

5. A universal syringe holder for automatic chromatography detection according to claim 4, characterized in that: The fixed support plate includes a second connecting plate and a second positioning support plate. The second connecting plate is fixedly connected to the fixed end of the adjustable pressure cylinder through bolts, and the second positioning support plate is fixedly connected to the second connecting plate.

6. A universal syringe holder for automatic chromatography detection according to claim 5, characterized in that: The first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate have the same structure. The first clamping block, the second clamping block, the first positioning support plate and the second positioning support plate are all composed of two bent clamping blocks, and the two bent clamping blocks are V-shaped.

7. A universal syringe holder for automatic chromatography detection according to claim 1, characterized in that: The connecting component is a rectangular plate, the bottom of which is fixedly connected to the mounting frame by screws, and the top of which is provided with a threaded hole for fixing the three-axis manipulator or the six-degree-of-freedom robot to the rectangular plate.

Images