Rapid detection device for TDI in air

Abstract

The utility model discloses a rapid detection device for TDI in air, which comprises a chromatographic instrument main body, a functional groove is arranged on the chromatographic instrument main body through a support frame, a rotating frame is arranged in the functional groove through a driving motor, the rotating frame is provided with a fixing frame, the fixing frame is provided with a placing groove, a test tube is arranged in the placing groove through a top plate, and the test tube is connected with the top plate. A reciprocating lead screw is rotationally arranged on the fixing frame and connected with the top plate through a lifting mechanism. The number of the test tubes is eight, the test tubes are circumferentially distributed in the placing groove at equal intervals, the test tube close to the chromatograph main body is located at the highest position through the unique lifting mechanism, more test tubes are ejected out by the ejection plate, and the test tubes are convenient to grasp and take out and are more convenient to take and use. And the test tube farthest from the chromatograph main body is located at the lowest position, and the leaked part is least, so that the test tube can be effectively prevented from being separated from the placing groove, the test tube has enough placing stability, and the safety of a sample in the detection process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of air analysis and detection technology, and in particular to a rapid detection device for TDI in air. Background Technology

[0002] In the current design architecture of airborne toluene diisocyanate (TDI) detection devices, the test tube rack, as a key component for holding sample tubes, exhibits several drawbacks in its layout. Most mainstream designs employ a linear test tube rack structure, arranging the test tubes in a linear fashion. This layout results in relatively large intervals between test tubes, especially those located at the far end of the rack, significantly increasing the spatial distance between the tubes and the operator. This undoubtedly poses considerable difficulties for retrieving and handling the test tubes.

[0003] To overcome the obstacle of retrieving test tubes from distant locations, operators often choose to increase the length of the test tube extending beyond the placement area. However, while this improves ease of retrieval, it severely compromises the stability of the test tube placement. From a mechanical perspective, increasing the length of the extended test tube shifts its center of gravity upwards, while simultaneously reducing the effective support area at the bottom. During the operation of the testing device, even extremely minor vibrations can easily cause the test tube to wobble due to the imbalance between the center of gravity and the support structure. With continued vibration, the amplitude of the wobble will cumulatively increase, eventually potentially causing the test tube to fall from its designated position. Once a test tube falls, it will have a series of serious consequences for the testing process. The primary impact is the loss of samples, which directly leads to the inability to complete the testing task as planned, rendering the previously invested manpower, resources, and time wasted. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid detection device for TDI in the air.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rapid detection device for TDI in air includes a chromatograph body. The chromatograph body has a functional slot provided by a support frame. A rotating frame is mounted within the functional slot via a drive motor. A fixed frame is mounted on the rotating frame. A placement slot is mounted on the fixed frame. A test tube is placed in the placement slot via a top plate. A reciprocating screw is rotatably mounted on the fixed frame. The reciprocating screw is connected to the top plate via a lifting mechanism. A gear ring is provided within the functional slot. The reciprocating screw is connected to the gear ring via a transmission mechanism. A baffle plate is provided within the functional slot. The baffle plate has an opening and is connected to the gear ring via a contact mechanism. A mounting ring is provided on the baffle plate. A positioning frame is slidably mounted through the mounting ring via an elastic mechanism. A rotating slot is provided on the outer wall of the functional slot.

[0007] Preferably, the lifting mechanism includes a lifting frame threaded onto a reciprocating screw, and the end of the lifting frame is fixedly connected to the top plate.

[0008] Preferably, the transmission mechanism includes a gear mounted on a fixed frame and connected to a reciprocating lead screw, the gear meshing with a gear ring.

[0009] Preferably, the contact mechanism includes a limiting ring installed at the bottom of the baffle plate, and the upper end face of the toothed ring is provided with a rotating groove.

[0010] Preferably, the elastic mechanism includes a spring sleeved on the outside of the positioning frame rod, with both ends of the spring connected to the outer wall of the positioning frame head and the outer wall of the mounting ring, respectively.

[0011] Preferably, the number of test tubes is eight, and the eight test tubes are distributed at equal intervals around the circumference.

[0012] The beneficial effects of this utility model are:

[0013] 1. The test tubes are arranged in eight equal intervals around the circumference in the placement slot. Through a unique lifting mechanism, the test tubes closest to the main body of the chromatograph are at the highest point and are pushed out by the top plate, making them easy to grasp and take out, and extremely convenient to use.

[0014] 2. The test tube furthest from the main body of the chromatograph is located at the lowest point, with minimal leakage, which effectively prevents it from detaching from the placement slot, ensuring sufficient placement stability and guaranteeing the safety of the sample during the detection process.

[0015] 3. The positioning frame connected by the elastic mechanism cooperates with the rotating groove of the gear ring. The positioning frame can be dragged to stretch the spring, so that the positioning frame rod is separated from the rotating groove. Then, the mounting ring is lifted to drive the baffle plate to detach from the functional groove for disassembly, which can facilitate cleaning and other operations inside the functional groove.

[0016] 4. The drive motor serves as the power source, and through a series of transmission structures such as the rotating frame, fixed frame, gear ring, gears, and reciprocating screw, it enables the test tube to be stably lifted and rotated. All components work together and operate smoothly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a rapid detection device for TDI in air proposed in this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0019] Figure 3 A vertical cross-sectional view of components such as functional slots;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;

[0021] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B.

[0022] In the diagram: 1. Chromatograph body, 2. Support frame, 3. Functional slot, 4. Mounting ring, 5. Baffle plate, 6. Opening, 7. Placement slot, 8. Test tube, 9. Drive motor, 10. Rotating frame, 11. Fixed frame, 12. Reciprocating screw, 13. Lifting frame, 14. Top plate, 15. Gear, 16. Gear ring, 17. Limiting ring, 18. Contact slot, 19. Positioning frame, 20. Spring, 21. Rotating slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 This device is used for the rapid detection of TDI in the air, and its core is the chromatograph body 1. Its specific structure and working principle can be found in existing technology. The chromatograph body 1 is supported by a support frame 2, and the functional slot 3 plays a crucial role in supporting and operating the instrument.

[0025] Within functional slot 3, drive motor 9 serves as the power source. After starting, drive motor 9 causes rotating frame 10 to rotate within functional slot 3. A fixed frame 11 is mounted on rotating frame 10, and the fixed frame 11 rotates together with rotating frame 10. The fixed frame 11 has a placement slot 7, where test tubes 8 for testing are placed. Eight test tubes 8 are placed in the placement slot 7, evenly spaced circumferentially. Each test tube 8 is fixed in the placement slot 7 by a top plate 14. The sample is sealed inside the test tube 8.

[0026] A reciprocating screw 12 is rotatably mounted on the fixed frame 11, and the reciprocating screw 12 is connected to the top plate 14 via a lifting mechanism. The lifting mechanism consists of a lifting frame 13 threaded onto the reciprocating screw 12, with its end fixedly connected to the top plate 14. When the reciprocating screw 12 rotates, due to the threaded engagement between the lifting frame 13 and the reciprocating screw 12, the lifting frame 13 moves up and down along the axial direction of the reciprocating screw 12, thereby driving the top plate 14 and the test tube 8 to move up and down.

[0027] As shown in the figure, the vertical part of the lifting frame 13 serves as a limit to prevent it from rotating along with the reciprocating screw 12.

[0028] A gear ring 16 is provided in the functional slot 3, and the reciprocating screw 12 is connected to the gear ring 16 through a transmission mechanism. The transmission mechanism includes a gear 15 mounted on the fixed frame 11 and connected to the reciprocating screw 12, and the gear 15 meshes with the gear ring 16. When the gear ring 16 rotates, it drives the meshing gear 15 to rotate, and the gear 15 drives the reciprocating screw 12 to rotate, thereby realizing the lifting and lowering movement of the test tube 8.

[0029] The functional slot 3 is also equipped with a baffle plate 5, which has an opening 6. The baffle plate 5 is connected to the gear ring 16 through a contact mechanism. The contact mechanism consists of a limiting ring 17 installed at the bottom of the baffle plate 5 and a rotating groove 21 on the upper end face of the gear ring 16. The limiting ring 17 is located in the rotating groove 21, which can ensure the stability of the gear ring 16 in the functional slot 3.

[0030] A mounting ring 4 is installed on the baffle plate 5, and a positioning frame 19 is slidably mounted on the mounting ring 4 via an elastic mechanism. The elastic mechanism consists of a spring 20 sleeved on the outside of the rod of the positioning frame 19, with both ends of the spring 20 connected to the outer wall of the head of the positioning frame 19 and the outer wall of the mounting ring 4, respectively. The spring 20 enables the positioning frame 19 to be dragged, ensuring that its rod is within the rotating groove 21, thus preventing the mounting ring 4 from moving vertically.

[0031] Components not specifically described in this utility model are all standard parts and can be purchased from the market. The specific connection methods for each component all employ mature methods from the prior art, and will not be detailed here. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0032] In use, the drive motor 9 rotates the rotating frame 10, causing the fixed frame 11 and test tubes 8 to rotate accordingly. The rotation of the gear ring 16 causes the reciprocating screw 12 to rotate through the transmission mechanism, thus raising and lowering the test tubes 8. When the test tubes 8 are close to the chromatograph body 1, they are at their highest point, meaning they are pushed out more by the top plate 14, making them easier to grasp and remove. The test tubes 8 furthest from the chromatograph body 1 are at their lowest point, meaning they are in the lowest position with the least amount of leakage, effectively preventing them from detaching from the placement slot 7 and providing sufficient placement stability.

[0033] In this solution, the positioning frame 19 can be dragged to stretch the spring 20, and then the rod of the positioning frame 19 will disengage from the rotating groove 21. Then the mounting ring 4 can be lifted to drive the baffle plate 5 to disengage from the functional groove 3 for disassembly. After that, the inside of the functional groove 3 can be easily cleaned and other operations can be performed.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for rapid detection of TDI in air comprising a chromatograph body (1), characterized in that, The chromatograph body (1) is provided with a functional slot (3) via a support frame (2). A rotating frame (10) is provided in the functional slot (3) via a drive motor (9). A fixed frame (11) is installed on the rotating frame (10). A placement slot (7) is installed on the fixed frame (11). A test tube (8) is placed in the placement slot (7) via a top plate (14). A reciprocating screw (12) is rotatably provided on the fixed frame (11). The reciprocating screw (12) is connected to the top plate (14) via a lifting mechanism. The functional slot (3) is provided with a gear ring (16), and the reciprocating screw (12) is connected to the gear ring (16) through a transmission mechanism. The functional slot (3) is provided with a baffle plate (5), and the baffle plate (5) is provided with an opening (6). The baffle plate (5) is connected to the gear ring (16) through a contact mechanism. The baffle plate (5) is provided with an mounting ring (4), and the mounting ring (4) is provided with a positioning frame (19) that slides through it through an elastic mechanism. The outer wall of the functional slot (3) is provided with a rotating slot (21).

2. The device for rapid detection of TDI in air according to claim 1, characterized in that, The lifting mechanism includes a lifting frame (13) threadedly mounted on a reciprocating screw (12), and the end of the lifting frame (13) is fixedly connected to the top plate (14).

3. The device for rapid detection of TDI in air according to claim 2, characterized in that, The transmission mechanism includes a gear (15) mounted on a fixed frame (11) and connected to a reciprocating lead screw (12), the gear (15) meshing with a gear ring (16).

4. The device for rapid detection of TDI in air according to claim 3, characterized in that, The contact mechanism includes a limiting ring (17) installed at the bottom of the baffle plate (5), and the upper end face of the toothed ring (16) is provided with a rotating groove (21).

5. The device for rapid detection of TDI in air according to claim 4, characterized in that, The elastic mechanism includes a spring (20) sleeved on the outside of the rod of the positioning frame (19), and the two ends of the spring (20) are respectively connected to the outer wall of the head of the positioning frame (19) and the outer wall of the mounting ring (4).

6. The device for rapid detection of TDI in air according to claim 5, characterized in that, The number of test tubes (8) is eight, and the eight test tubes (8) are distributed at equal intervals around the circumference.

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