Kjeldahl apparatus sample feeding machine and Kjeldahl apparatus

Abstract

The utility model belongs to the technical field of Kjeldahl determination experiments, and provides a Kjeldahl apparatus sample feeding machine and a Kjeldahl apparatus. A second horizontal moving device is arranged on the rack, a vertical moving device is vertically arranged on the second horizontal moving device, and a mechanical gripper is arranged on the vertical moving device; a third horizontal moving device is further arranged on the rack, and a test tube fixing piece is arranged on the third horizontal moving device; the second horizontal moving device and the vertical moving device are arranged on the rack, the requirement for the freedom degree in the horizontal direction and the vertical direction is met, on the basis, after a test tube is clamped by the mechanical gripper, the clamped test tube can be conveyed to a test tube fixing piece on the third horizontal moving device, and the test tube can be conveniently and rapidly moved. Then the test tube fixing piece and the test tube are integrally conveyed to the to-be-tested position of the azotometer through the third horizontal moving device, the mode that an experimenter operates the test tube is replaced, and compared with a traditional test tube conveying mode, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of Kjeldahl nitrogen determination experiments, and particularly relates to a Kjeldahl nitrogen analyzer sample feeder and a Kjeldahl nitrogen analyzer. Background Art

[0002] During the Kjeldahl nitrogen determination experiment, before the sample is distilled, absorbed, and titrated, the sample needs to be placed in a test tube and first decomposed under high-temperature conditions in a digestion instrument; after digestion, the test tube with the sample is then placed on the test position of the Kjeldahl nitrogen analyzer.

[0003] The inventor found that in traditional Kjeldahl nitrogen determination experiments, it is necessary to manually place multiple test tubes on the test tube rack onto the test position of the Kjeldahl nitrogen analyzer in sequence. The entire experimental process requires continuous operation by the experimenter, which is time-consuming and laborious. Moreover, during the process of placing the test tubes, the residual liquid at the upper end of the test position of the nitrogen analyzer is likely to drip onto the experimenter's hands and is not easy to clean. In the existing design, a sample feeder is installed below the nitrogen analyzer, and test tubes are placed through a turntable, and the test tubes are lifted by a push rod. There are problems such as the need for manual transfer of test tubes between the tube rack and the turntable, a complex process of lifting and lowering the test tubes, many error factors, and serious reagent dripping and splashing pollution. In the existing design, a sample feeder is installed on one side of the nitrogen analyzer, and reagents are first transferred between different test tubes through a pump valve pipeline and then tested. There are various problems such as reagent transfer errors and interference between front and rear reagents, and the pipeline is complex and the maintenance cost is high. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a Kjeldahl nitrogen analyzer sample feeder and a Kjeldahl nitrogen analyzer. The utility model designs a simple structure on one side of the nitrogen analyzer to achieve the purpose of sending the test tubes on the test tube rack to the test position of the Kjeldahl nitrogen analyzer.

[0005] According to some embodiments, the first solution of the utility model provides a Kjeldahl nitrogen analyzer sample feeder, and the technical scheme is as follows:

[0006] A Kjeldahl nitrogen analyzer sample feeder includes a frame;

[0007] A second horizontal moving device is arranged on the frame through a first horizontal moving device, a vertical moving device is vertically arranged on the second horizontal moving device, and a mechanical gripper is arranged on the vertical moving device;

[0008] A third horizontal moving device is further arranged on the frame, and a test tube fixing member is arranged on the third horizontal moving device.

[0009] Furthermore, the frame includes a bottom plate, multiple columns vertically fixed on the bottom plate, and a first horizontal moving device arranged on the columns.

[0010] Further, a reinforcing rod is provided between two adjacent columns.

[0011] Further, two sliding rails are provided on the bottom plate.

[0012] Further, the first horizontal moving device includes a first motor, a first lead screw connected to the first motor, and a first nut sleeve disposed on the first lead screw.

[0013] Further, the second horizontal moving device and the third horizontal moving device are provided as telescopic rods or linear motors; the vertical moving device is provided as a telescopic rod.

[0014] Further, two elastic clamping jaws are provided on the mechanical gripper.

[0015] Further, a transparent cover is provided outside the frame.

[0016] Further, a multi-degree-of-freedom robotic arm is provided on the frame.

[0017] According to some embodiments, a second aspect of the present invention provides a Kjeldahl apparatus, adopting the following technical solutions:

[0018] A Kjeldahl apparatus adopts the Kjeldahl apparatus sample inlet machine as described in the first aspect.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] By providing a second horizontal moving device and a vertical moving device on the frame, the present invention realizes the degree-of-freedom requirements in the horizontal and vertical directions. On this basis, a mechanical gripper is provided on the vertical moving device. After clamping the test tube, the clamped test tube can be sent to the test tube fixing member on the third horizontal moving device, and then the test tube fixing member and the test tube as a whole are transported to the test position of the Kjeldahl apparatus by the third horizontal moving device, replacing the way of experimental personnel operating the test tube. Compared with the traditional way of transporting test tubes, the structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0022] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0023] Figure 2 is a schematic structural diagram of the telescopic rod of Embodiment 1 of the present invention;

[0024] Figure 3 Schematic diagram of the mechanical gripper structure of Embodiment 1 of the present utility model;

[0025] Figure 4 Schematic diagram of the horizontal movement device structure of Embodiment 1 of the present utility model;

[0026] Figure 5 Schematic diagram of the structure of Embodiment 2 of the present utility model;

[0027] Wherein: 1, frame; 11, second horizontal movement device; 1101, second motor; 1102, second screw; 1103, second nut; 12, vertical movement device; 13, mechanical gripper; 1301, elastic claw; 1302, groove; 14, third horizontal movement device; 15, test tube fixing member; 16, bottom plate; 17, column; 18, first horizontal movement device; 1801, first motor; 1802, second screw; 1803, second nut; 1804, slide rail; 1805, slider; 19, strengthening rod; 110, slide rail; 2, test position of the Kjeldahl nitrogen analyzer to be tested; 3, test tube support; 4, test tube; 41, edge; 5, multi-degree-of-freedom robot arm. Detailed implementation manners

[0028] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further description of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0030] Embodiment 1:

[0031] In traditional Kjeldahl nitrogen determination experiments, it is necessary to manually place multiple test tubes on the test tube rack onto the test positions of the Kjeldahl nitrogen analyzer one by one, which is time-consuming and laborious, and the residual liquid at the upper end of the test position of the Kjeldahl nitrogen analyzer is likely to drip onto the hands of the experimenter and is not easy to clean; for other traditional test tube sampling methods, the pipelines are complex, the cost and control cost are relatively high, and they are not suitable for Kjeldahl nitrogen determination experiments; in view of the above problems, as Figure 1 and Figure 2 shown, this embodiment provides a Kjeldahl nitrogen analyzer sample inlet machine, including a frame 1, and the frame 1 can be connected to the side of the existing nitrogen analyzer by means of bolts or welding, etc.

[0032] The frame 1 includes a vertically arranged column 17 and a first horizontal moving device 18, as well as a reinforcing rod 19 vertically arranged on the column, etc.; a second horizontal moving device 11 is vertically arranged on the first horizontal moving device 18, a vertical moving device 12 is vertically arranged on the second horizontal moving device 11, and a mechanical gripper 13 is arranged on the vertical moving device 12;

[0033] A third horizontal moving device 14 is further arranged at the bottom of the frame 1, and a test tube fixing member 15 is arranged on the third horizontal moving device 14.

[0034] In some embodiments, the side wall of the nitrogen analyzer near the test position 2 of the nitrogen analyzer is removed, and the third horizontal moving device 14 extends into the test position 2 of the nitrogen analyzer.

[0035] Specifically, by arranging the second horizontal moving device 11 and the vertical moving device 12 on the frame 1, the degree-of-freedom requirements in the horizontal and vertical directions are achieved. On this basis, by arranging the mechanical gripper 14 on the vertical moving device 13, after clamping the test tube 4, the clamped test tube 4 can be sent to the test tube fixing member 15, and then the test tube fixing member 15 and the test tube 4 are integrally transported to the test position 2 of the nitrogen analyzer by the third horizontal moving device 14, replacing the way of the experimenter operating the test tube. Compared with the traditional way of transporting the test tube, the structure is simple and the cost is low.

[0036] Optionally, the test tube fixing member 15 is of a rectangular block structure, and a round hole is opened on the rectangular block for fixing the bottom of the test tube 4. In some embodiments, a hydraulic lifting device or a pneumatic lifting device can be arranged below the whole of the existing nitrogen analyzer. When the third horizontal moving device 14 moves the test tube fixing member 15 and the test tube 4 towards the test position 2 of the nitrogen analyzer, the hydraulic lifting device or the pneumatic lifting device moves the nitrogen analyzer upward, so that the lowest part of the distillation tube on the nitrogen analyzer is higher than the highest part of the test tube 4. When the test tube 4 moves to the test position 2 of the nitrogen analyzer, the hydraulic lifting device or the pneumatic lifting device then drives the nitrogen analyzer to move downward, and the distillation tube is inserted into the test tube; in some other embodiments, a hydraulic lifting device or a pneumatic lifting device can also be installed on the distillation device of the existing nitrogen analyzer. When the third horizontal moving device 14 moves the test tube 4 towards the test position 2 of the nitrogen analyzer, the hydraulic lifting device or the pneumatic lifting device moves the distillation device together with the distillation tube upward, so that the lowest part of the distillation tube is higher than the highest part of the test tube 4. When the test tube 4 moves to the test position 2 of the nitrogen analyzer, the hydraulic lifting device or the pneumatic lifting device then drives the distillation device together with the distillation tube to move downward, and the distillation tube is inserted into the test tube. At this time, in order to realize the up and down movement of the distillation device, the test position 2 of the nitrogen analyzer can be separately arranged from the nitrogen analyzer, and the test position 2 of the nitrogen analyzer can be separately fixed on a reinforcing rod 19.

[0037] In this embodiment, the frame 1 includes a bottom plate 16, multiple upright columns 17 vertically fixed on the bottom plate, and a first horizontal moving device 18 arranged on the upright columns 17. Optionally, the bottom plate 16 is a metal plate, the upright columns 17 are metal upright columns, and there are 4 upright columns, which can be fixed to the bottom plate 16 by welding or other means.

[0038] A reinforcing rod 19 is arranged between every two adjacent upright columns 4, which improves the stability of the frame 1. It should be noted that no reinforcing rod is arranged on the side where the test tube holder 3 enters, such as Figure 1 the rear side in []. To improve the flexibility and stability of the test tube holder 3 on the bottom plate 16, two parallel slide rails 110 can be arranged on the bottom plate 16, and correspondingly, two sliding grooves are arranged on the test tube holder 3 to correspond to the slide rails; it can be understood that after the test tube holder 3 together with the test tube 4 is digested in the digester, the test tube holder 3 is placed into the frame 1 along the slide rails 110 by a staff member or other device, and then the transportation action of the test tube 4 is carried out.

[0039] The second horizontal moving device 11 and the third horizontal moving device 14 are arranged as telescopic rods or linear motors and other structures.

[0040] Such as Figure 2 shown, the vertical moving device 12 is arranged as a telescopic rod, such as an electric telescopic rod, a hydraulic telescopic rod or a pneumatic telescopic rod and other structures; the telescopic end 1202 of the telescopic rod is welded or bolted to the moving end of the second horizontal moving device 11 through a base 1201. When the second horizontal moving device 11 adopts a telescopic rod, the telescopic end 1202 is welded or bolted to the first horizontal moving device 18 through a base 1201.

[0041] Optionally, two elastic clamping claws 1301 are arranged on the mechanical gripper 13, and the test tube 4 is grabbed by relying on elasticity. In some embodiments, as Figure 3 shown, grooves 1302 are opened on the two elastic clamping claws 1301, and the edge 41 position at the upper opening of the test tube 4 is clamped through the grooves 1302 to realize the grasping of the test tube 4 by the mechanical gripper 13. It should be noted that when the mechanical gripper 13 grabs and releases the test tube 4, it is all carried out on the side of the test tube 4 to realize the matching and separation of the groove 1302 and the edge 41.

[0042] The second horizontal moving device 11 is arranged on the first horizontal moving device 18; specifically, if the second horizontal moving device 11 is a telescopic rod, the telescopic rod is directly fixed to one end of the first horizontal moving device 18, and one end of the vertical moving device 12 is fixed to the telescopic end of the telescopic rod.

[0043] In some embodiments, as Figure 4 shown, there are two first horizontal moving devices 18. On one of the first horizontal moving devices 18, a first screw rod 1802 is rotatably arranged through a bearing member. One end of the first screw rod 1802 is connected to a first motor 1801, and a first nut 1803 is connected to the first screw rod 1802 through thread matching; on the other first horizontal moving device 18, a slide rail 1804 is arranged, and a slider 1805 is slidably arranged on the slide rail 1804. Correspondingly, the second horizontal moving device 11 includes a second screw rod 1102 rotatably arranged through a bearing, and the second screw rod 1102 is connected to a second motor 11014; a second nut 1103 is connected to the second screw rod 1102 through thread matching. It can be understood that both ends of the second horizontal moving device 11 are respectively connected to the first nut 1803 and the slider 1805 through connection means such as bolts; the vertical moving device 12 is arranged on the second nut 1103 through connection means such as bolt connection, for example, the base 1201 is arranged on the second nut 1103. The third horizontal moving device 14 can adopt the same mechanism as the second horizontal moving device 11, including a motor, a screw rod, and a nut, and the test tube fixing member 15 is fixed on the nut. When the second horizontal moving device 11 adopts a telescopic rod, the telescopic rod is directly fixed on the first nut 1803 through the base.

[0044] Specifically, when the first motor 1801 drives the first screw rod 1802, the first nut 1803 drives the second horizontal moving device 11 to move along the axial direction of the first screw rod 1802; when the second motor 1101 drives the second screw rod 1102 to rotate, the second nut 1103 drives the vertical moving device 12 to move along the axial direction of the second screw rod 1102; through the axial movements in the above two directions, the mechanical gripper 13 is moved on the horizontal plane.

[0045] To prevent the influence of the external environment on the test tube 4 and the sample in the test tube 4, in this embodiment, a transparent cover is arranged outside the frame 1 through bolt connection, and the transparent cover can be made of materials such as glass plates or acrylic plates. It should be noted that in order to enable the test tube support 3 to enter and the test tube fixing member 15 to reach the test position 2 of the Kjeldahl apparatus, corresponding rectangular windows are opened on the back of the frame 1 and at the position of the frame 1 close to the test position 2 of the Kjeldahl apparatus.

[0046] The working process or principle of this embodiment is as follows:

[0047] By arranging the second horizontal moving device 11 and the vertical moving device 12 on the rack 1, after adjusting the mechanical gripper 14 above the test tube rack 3, the vertical moving device 12 drives the mechanical gripper 14 to descend and clamp the test tube 4 at the corresponding position.

[0048] After the mechanical gripper 14 clamps the test tube 4, the second horizontal moving device 11 and the vertical moving device 12 drive the mechanical gripper 14 to the test tube fixing member 15, and place the bottom of the test tube 4 into the circular hole of the test tube fixing member 15, and the mechanical gripper 14 releases the test tube 4.

[0049] The third horizontal moving device 14 moves the test tube fixing member 15 together with the test tube 4 to the nitrogen determination instrument waiting test position 2, completing the movement of the test tube 4.

[0050] When transporting the next test tube, in the reverse operation, first transport the previous test tube at the nitrogen determination instrument waiting test position 2 to the test tube rack 3, and then transport the next test tube.

[0051] Embodiment 2:

[0052] This embodiment provides a Kjeldahl nitrogen analyzer feeder, including a rack 1. Different from the embodiment, a multi-degree-of-freedom robot arm 5 is arranged on the rack 1 by means of bolt connection or the like. Through the multi-degree-of-freedom robot arm 5 and the gripper arranged at the front end of the multi-degree-of-freedom robot arm 5, the test tube 4 on the test tube support 3 is sent to the nitrogen determination instrument waiting test position 2; the multi-degree-of-freedom robot arm 5 and its front-end gripper can be realized by conventional technologies and will not be elaborated here.

[0053] Embodiment 3:

[0054] This embodiment provides a Kjeldahl nitrogen analyzer, which adopts the Kjeldahl nitrogen analyzer feeder as described in Embodiment 1; it can be obtained by adding a feeder on the basis of an existing Kjeldahl nitrogen analyzer and will not be elaborated here.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Kjeldahl nitrogen analyzer sample feeder, characterized in that, including a frame; A second horizontal moving device is arranged on the frame through a first horizontal moving device. A vertical moving device is vertically arranged on the second horizontal moving device, and a mechanical gripper is arranged on the vertical moving device; A third horizontal moving device is further arranged on the frame, and a test tube fixing member is arranged on the third horizontal moving device.

2. The Kjeldahl nitrogen analyzer sample feeder according to claim 1, wherein, The frame includes a bottom plate, multiple columns vertically fixed on the bottom plate, and a first horizontal moving device arranged on the columns.

3. The Kjeldahl nitrogen analyzer sample feeder according to claim 2, characterized in that, A reinforcing rod is arranged between two adjacent columns.

4. The Kjeldahl nitrogen analyzer sample feeder according to claim 2, characterized in that, Two slide rails are arranged on the bottom plate.

5. The Kjeldahl nitrogen analyzer sample feeder according to claim 2, wherein, The first horizontal moving device includes a first motor, a first lead screw connected to the first motor, and a first nut sleeve arranged on the first lead screw.

6. The Kjeldahl nitrogen analyzer sample feeder according to claim 1, characterized in that, The second horizontal moving device and the third horizontal moving device are arranged as telescopic rods or linear motors; the vertical moving device is arranged as a telescopic rod.

7. The Kjeldahl nitrogen analyzer sample feeder according to claim 1, wherein, Two elastic claws are arranged on the mechanical gripper.

8. The Kjeldahl nitrogen analyzer sample feeder according to claim 1, wherein, A transparent cover is arranged outside the frame.

9. The Kjeldahl nitrogen analyzer sample feeder according to claim 1, wherein, A multi-degree-of-freedom robotic arm is arranged on the frame.

10. A Kjeldahl nitrogen analyzer, characterized in that, Adopting the Kjeldahl nitrogen analyzer sample feeder according to any one of claims 1-9.

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