Automatic sampling device of total organic carbon analyzer

Abstract

The utility model relates to the technical field of water quality detection, in particular to an automatic sampling device of a total organic carbon analyzer, which comprises a placing platform, a rotating mechanism and a lifting mechanism are arranged below the placing platform, a placing cylinder for placing a test tube is arranged on the placing platform, and rotating shafts are respectively and rotatably connected to the left side wall and the right side wall of the placing cylinder. A clamping plate for clamping and fixing a test tube is fixedly arranged on the rotating shaft, and the rotating shaft is in transmission connection with a driving assembly for driving the clamping plate to swing. The clamping plate and the driving assembly are arranged, a worker only needs to insert a test tube into the containing cylinder from top to bottom, the wall of the test tube can be clamped and fixed, operation is easy, convenient and effective, the situation that the test tube is inclined under the action of centrifugal force and inertia in the multi-time rotary sample injection process is avoided, and the sample injection efficiency is improved. Further, the center of the opening of the test tube can accurately move to the position under the sample injection needle, and it is ensured that the sample injection needle can stretch into the test tube to suck a sample after the lifting mechanism ascends.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to an automatic sampling device for a total organic carbon analyzer. Background Art

[0002] The total organic carbon analyzer is basically used for the detection of total organic carbon in water. Its working principle is to first oxidize the carbon of organic matter in the water into carbon dioxide, eliminate interference factors, and then measure it with a carbon dioxide detector, and then convert the carbon dioxide gas content into the concentration of organic matter in the water through data processing. As an important part of the total organic carbon analyzer, the sampling device can inject the sampled sample into the measurement device, and the rate and stability of the sampling link will directly affect the measurement efficiency of the total organic carbon analyzer.

[0003] At present, in the sampling device of the total organic carbon analyzer, the test tube is placed vertically during detection. Due to the gap factor of the test tube placement slot, the test tube has tilted, which makes it easy for the test tube mouth to not be accurately aligned with the sampling needle (up and down alignment). Patent CN214278215U discloses a sampling device for a total organic carbon analyzer, including: an operating platform, a sample delivery unit and a sampling unit. The operating platform is used to carry the sampling unit and the sample delivery unit to provide an operating space for collecting samples from sample test tubes; the sample delivery unit is arranged on the operating platform to carry multiple sample test tubes and deliver the multiple sample test tubes to the predetermined position in sequence; the sampling unit is arranged on the operating platform and close to the predetermined position, and the sampling unit includes a transparent injection needle. The upper sample delivery unit only limits the bottom of the test tube by the limiting slot plate. After multiple rotations and injections, the test tube will tilt due to the centrifugal force and inertia, resulting in the inability of the test tube mouth to move accurately to the bottom of the injection needle, causing the injection needle to be unable to extend into the test tube to draw the sample, and eventually the injection device fails. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic sampling device for a total organic carbon analyzer in view of the deficiencies in the prior art, so as to solve the problem that after multiple rotations and injections in the prior art device, the test tube becomes tilted due to the effects of centrifugal force and inertia, resulting in the inability to accurately move the test tube mouth to the bottom of the injection needle, that is, the injection needle cannot be inserted into the test tube to draw the sample, and the injection device fails.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An automatic sampling device for a total organic carbon analyzer comprises a placing platform, a rotating mechanism and a lifting mechanism are arranged below the placing platform, a placing cylinder for placing a test tube is arranged on the placing platform, a rotating shaft is rotatably connected to the left and right side walls of the placing cylinder respectively, a clamping plate for clamping the test tube is fixedly arranged on the rotating shaft, and a driving component for driving the clamping plate to swing is transmission-connected to the rotating shaft.

[0007] Furthermore, the driving assembly includes a rotating rod fixedly connected to the rotating shaft, a pressure rod is provided above the rotating rod, a sliding groove is opened on the side wall of the placing cylinder, the pressure rod is slidingly connected to the placing cylinder through the sliding groove, one end of the torsion spring is fixedly connected to the rotating shaft, and the other end of the torsion spring is fixedly connected to the placing cylinder.

[0008] Furthermore, a protective cover for wrapping and protecting the driving component is provided on the outside of the placement tube.

[0009] Furthermore, the protective cover is made of transparent material.

[0010] Furthermore, a buffer pad is provided on the contact surface between the clamping plate and the test tube.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model is provided with a clamping plate and a driving component, and the staff only needs to insert the test tube into the placing cylinder from top to bottom to clamp and fix the test tube wall. The operation is simple and effective, and the test tube is prevented from tilting due to the centrifugal force and inertia during multiple rotation injection processes, so that the center of the test tube mouth can be accurately moved to just below the injection needle, ensuring that the injection needle can extend into the test tube to suck the sample after the lifting mechanism rises; at the same time, a torsion spring is arranged in the driving component, which can realize the clamping and fixing effect of test tubes with different diameters, thereby improving the practicality of the injection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of the placement platform provided by the utility model;

[0014] Figure 2 A schematic diagram of the structure inside the protective cover on the placement platform provided by the utility model;

[0015] Figure 3 A top view of the placement platform provided by the utility model;

[0016] Figure 4 for Figure 2 A partial enlarged view of the tube placed at position C in the middle;

[0017] Figure 5 for Figure 3 The cross-sectional view of the cylinder in the AA direction is placed in the middle;

[0018] Figure 6 for Figure 3 Place the cross-sectional view of the tube in the BB direction.

[0019] Wherein, the accompanying drawings are marked as follows:

[0020] 1. Placement platform; 2. Placement cylinder; 3. Rotating shaft; 4. Clamping plate; 5. Rotating rod; 6. Slide groove; 7. Pressure rod; 8. Protective cover. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] For easier understanding, see Figures 2 to 6The present embodiment provides an automatic sampling device for a total organic carbon analyzer, including a placement platform 1, a rotating mechanism is provided below the placement platform 1, the rotating mechanism is connected to the placement platform 1 for transmission, so that the placement platform 1 rotates with the center of the placement platform 1 as the center of the circle, and a lifting mechanism is provided below the rotation mechanism, the lifting mechanism is used to make the placement platform 1 and the rotation mechanism move vertically up and down together, and by setting the rotation mechanism and the lifting mechanism, an automatic sampling mode of first rotating and then lifting is realized. A plurality of placement tubes 2 are fixedly provided above the placement platform 1 and are arranged at intervals along the circumferential direction of the rotation center of the placement platform 1. The placement tube 2 is an internal hollow structure for placing test tubes. The left and right side walls of the placement tube 2 are respectively rotatably connected with a rotating shaft 3, and a clamping plate 4 for clamping and fixing the test tube is respectively fixed on the rotating shaft 3. The rotating shaft 3 is connected to the driving component for transmission, and the driving component can make the clamping plate 4 swing with the rotating shaft 3 as the axis.

[0026] After the staff inserts the test tube containing the sample to be tested into the placement tube 2, the two clamping plates 4 in the placement tube 2 are swung toward the center of the test tube by the driving assembly until both clamping plates 4 are in contact with the outer wall of the test tube, completing the clamping and fixing action of the test tube. The placement platform 1 is rotated as a whole by the rotating mechanism under the placement platform 1, and after the test tube in the placement tube 2 is moved to the bottom of the injection needle, the lifting mechanism raises the placement platform 1 until the injection needle can be inserted into the test tube to suck the sample, thereby realizing automatic injection. The clamping and fixing of the test tube by the clamping plate 4 prevents the test tube containing the sample to be tested from being tilted due to the centrifugal force and inertia during the multiple rotation injection process, thereby enabling the center of the test tube to be accurately moved to the bottom of the injection needle, ensuring that the injection needle can be inserted into the test tube to suck the sample after the lifting mechanism rises. After completing the inspection of the sample in the test tube, the staff swings the two clamping plates 4 in the placement tube 2 away from the center of the test tube through the driving assembly to release the clamping of the test tube, and then the test tube can be drawn out from above.

[0027] For easier understanding, please refer to Figures 2 to 6 One end of the rotating shaft 3 passes through the side wall of the placing tube 2 and extends to be fixedly connected to the rotating rod 5. The other end of the rotating shaft 3 is fixedly connected to the torsion spring. The other end of the torsion spring is fixedly connected to the placing tube 2. When the torsion spring is stationary, the clamping plate 4 is in an inward clamping state. When the torsion spring is subjected to torsion, the clamping plate 4 is in an outward loosening state. A sliding groove 6 is provided on the outer wall of the placing tube 2. A pressure rod 7 is slidably connected to the sliding groove 6. The lower part of the pressure rod 7 abuts against the two rotating rods 5 at intervals.

[0028] When the staff inserts the test tube containing the sample to be tested into the placement tube 2, the test tube will squeeze the clamping plates 4 on both sides to make it swing outward with the corresponding rotating shaft 3 as the axis. Since the clamping plates 4 are fixedly connected to the rotating shaft 3, the rotating shaft 3 is driven to rotate when the clamping plates 4 swing. Since the rotating shaft 3 is fixedly connected with a torsion spring, the rotating shaft 3 will apply torsion force to the torsion spring when it rotates. The clamping plates 4 will be pressed against the outer wall of the test tube by the torsion spring to clamp and fix the test tube. When it is necessary to take out the test tube in the placement tube 2, the staff presses the pressure rod 7, and the pressure rod 7 slides vertically downward in the slide groove 6. Since the pressure rod 7 is in contact with the two rotating rods 5 below, when the pressure rod 7 slides downward, the two rotating rods 5 are forced to rotate downward with the corresponding rotating shaft 3 as the axis, driving the rotating shaft 3 to rotate, and then the clamping plate 4 swings outward, releasing the clamping fixation of the test tube, and the test tube can be drawn out from the placement tube 2; when the staff releases the pressure rod 7, the two rotating rods 5 are respectively acted upon by the torsion springs, and rotate upward and reset with the rotating shaft 3 as the axis, pushing the pressure rod 7 to slide vertically upward and reset, that is, the clamping plate 4 is reset to the inward clamping state, waiting for the next test tube to be placed.

[0029] For easier understanding, see Figure 1 , a protective cover 8 made of a transparent material is provided on the outside of the placement tube 2. The protective cover 8 can wrap and protect the drive assembly, leaving only a pressing stroke of the pressure rod 7 at the top to prevent other factors from affecting the transmission relationship between the components in the drive assembly. At the same time, the transparent material can better observe the movement of the drive assembly. A buffer pad is provided on the contact surface between each clamping plate 4 and the test tube. The material of the buffer pad is preferably silicone. The buffer pad can play a buffering role between the test tube wall and the clamping plate 4 to prevent the clamping plate 4 from damaging the test tube when clamping the test tube.

[0030] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An automatic sampling device for a total organic carbon analyzer, comprising a placement platform (1), a rotating mechanism and a lifting mechanism are provided below the placement platform (1), characterized in that: The placement platform (1) is provided with a placement cylinder (2) for placing a test tube, and the left and right side walls of the placement cylinder (2) are rotatably connected to a rotating shaft (3), and a clamping plate (4) for clamping and fixing the test tube is fixedly provided on the rotating shaft (3), and the rotating shaft (3) is transmission-connected to a driving component for driving the clamping plate (4) to swing.

2. The automatic sampling device of the total organic carbon analyzer according to claim 1, characterized in that: The driving assembly comprises a rotating rod (5) fixedly connected to the rotating shaft (3), a pressure rod (7) is arranged above the rotating rod (5), a sliding groove (6) is opened on the side wall of the placement cylinder (2), the pressure rod (7) is slidably connected to the placement cylinder (2) through the sliding groove (6), the rotating shaft (3) is fixedly connected to one end of a torsion spring, and the other end of the torsion spring is fixedly connected to the placement cylinder (2).

3. The automatic sampling device of the total organic carbon analyzer according to claim 2, characterized in that: A protective cover (8) for wrapping and protecting the driving component is provided on the outside of the placement tube (2).

4. The automatic sampling device of the total organic carbon analyzer according to claim 3, characterized in that: The protective cover (8) is made of transparent material.

5. The automatic sampling device of the total organic carbon analyzer according to claim 1, characterized in that: A buffer pad is provided on the contact surface between the clamping plate (4) and the test tube.

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