A sample injector for water content analysis of chemical polyether

Abstract

This utility model discloses a sample injector for moisture analysis of chemical polyethers, comprising an injector body, a dustproof box fixedly installed on the front of the injector body, a sample holder located below the dustproof box at the bottom of the injector body, a through hole at the bottom of the dustproof box, a threaded rod rotatably connected inside the dustproof box to the rear side of the through hole, a lifting motor fixedly installed inside the dustproof box to the rear side of the threaded rod, the output end of the lifting motor being drivenly connected to the bottom of the threaded rod, and a lifting frame located inside the dustproof box being threadedly connected to the threaded rod, with a sample injection tube fixedly installed on the front of the lifting frame directly above the through hole. When the sample injection tube rises, a cleaning sponge cleans the sample outside the needle tube, while the interior of the dustproof box effectively ensures the cleanliness of the injection needle, thus improving the practicality of the sample injector.

Description

Technical Field

[0001] This utility model relates to the field of sample injector technology, specifically to a sample injector for moisture analysis of chemical polyethers. Background Technology

[0002] Polyether polyols (polyethers for short) are organic polymers produced by addition polymerization of initiators (compounds containing active hydrogen groups) with ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), etc., in the presence of a catalyst. The largest production volume of polyethers is achieved using glycerol (glycerol) as an initiator and epoxides (usually PO and EO used together). By changing the feeding method of PO and EO (mixed or separate addition), the feeding ratio, and the order of addition, various general-purpose polyether polyols can be produced.

[0003] During the production of polyether, it is necessary to use an analyzer to detect its moisture content. However, the injection tube head of the existing injector is exposed to the outside for a long time, which is prone to dust accumulation. Before using the injector device, the needle needs to be cleaned, which is too cumbersome and time-consuming, thus reducing the practicality of the injector in use.

[0004] Therefore, we propose a sampler for moisture analysis of chemical polyethers. Utility Model Content

[0005] The purpose of this invention is to provide a sample injector for moisture analysis of chemical polyethers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sample injector for moisture analysis of chemical polyethers, comprising an injector body, a dustproof box fixedly installed on the front of the injector body, a sample holder located below the dustproof box at the bottom of the injector body, a through hole at the bottom of the dustproof box, a threaded rod rotatably connected inside the dustproof box to the rear side of the through hole, a lifting motor fixedly installed inside the dustproof box to the rear side of the threaded rod, the output end of the lifting motor being drivenly connected to the bottom of the threaded rod, a lifting frame located inside the dustproof box being threadedly connected through the threaded rod, and a sample injector fixedly installed on the front of the lifting frame directly above the through hole. The sample inlet tube has a needle tube integrally installed at its bottom. An electric push rod located on one side of the through hole is fixedly installed inside the dust box. A transmission located on the other side of the through hole is rotatably connected inside the dust box. A movable plate is fixedly installed at the movable end of the electric push rod. A first rack is fixedly installed on the side of the movable plate and slidably connected to the inside of the dust box. The first rack meshes with one side of the transmission gear. A second rack located behind the transmission gear is slidably connected inside the dust box. The second rack meshes with the other side of the transmission gear. Another movable plate is fixedly installed at the end of the second rack facing the through hole. A cleaning sponge is detachably installed on the opposite sides of the two movable plates.

[0007] Optionally, a first bevel gear is fixedly installed at the output end of the lifting motor, and a second bevel gear is fixedly installed at the bottom of the threaded rod, with the first bevel gear meshing with the second bevel gear.

[0008] Optionally, the dustproof box is internally fixedly equipped with guide slides located on both sides of the threaded rod, and the two sides of the lifting frame are slidably connected to the guide slides.

[0009] Optionally, a sliding groove located in front of the through hole is fixedly installed inside the dust box, and the first rack is slidably connected to the inside of the sliding groove.

[0010] Optionally, a limiting groove located behind the transmission gear is fixedly installed inside the dust box, and the inside of the limiting groove is slidably connected to the second rack.

[0011] Optionally, the diameter of the through hole is larger than the diameter of the injection tube, and the through hole is coaxial with the injection tube.

[0012] Optionally, the top of the injection tube is provided with a connecting hose, and the other end of the connecting hose is connected to the interior of the injector body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This injector for moisture analysis of chemical polyethers, by incorporating cleaning sponges, allows for the following process: When the injection tube moves downwards to collect a sample through the needle, an electric push rod pushes a moving plate towards the through hole, simultaneously moving the first gear. This, in turn, causes the transmission gear to rotate, driving the second rack to push another moving plate closer to the through hole. This allows the two cleaning sponges to wrap around the needle. As the injection tube rises, the cleaning sponges clean the sample outside the needle. Simultaneously, the sponges, located inside the dustproof box, effectively ensure the cleanliness of the injection needle, thus improving the practicality of the injector.

[0015] 2. The sampler for moisture analysis of chemical polyether is equipped with a threaded rod. During sampling, the lifting motor drives the threaded rod to rotate, which in turn causes the lifting frame to lower the sample tube along the guide slide. The needle is inserted into the sample bottle placed in the sample rack through the through hole to take a sample. After sampling, the lifting motor reverses and raises the sample tube into the dustproof box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a sampler for moisture analysis of chemical polyethers according to this utility model;

[0017] Figure 2 This is a schematic diagram of the dustproof box of a sampler for moisture analysis of chemical polyethers according to this utility model.

[0018] Figure 3 This is a schematic diagram of the threaded rod of a sampler for moisture analysis of chemical polyethers according to this utility model.

[0019] Figure 4 This is a schematic diagram of the cleaning sponge for a sampler used in moisture analysis of chemical polyethers according to this utility model.

[0020] In the diagram: 1. Injector body; 2. Dustproof box; 3. Sample holder; 4. Through hole; 5. Threaded rod; 6. Lifting motor; 7. Lifting frame; 8. Injection tube; 9. Needle tube; 10. Connecting hose; 11. Guide slide rod; 12. First bevel gear; 13. Second bevel gear; 14. Electric push rod; 15. Moving plate; 16. Cleaning sponge; 17. First rack; 18. Sliding groove; 19. Limiting groove; 20. Second rack; 21. Transmission gear. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 This utility model provides a sample injector for moisture analysis of chemical polyethers, including an injector body 1, a dustproof box 2 fixedly installed on the front of the injector body 1, a sample holder 3 located below the dustproof box 2 at the bottom of the injector body 1, a through hole 4 at the bottom of the dustproof box 2, a threaded rod 5 rotatably connected to the inside of the dustproof box 2 located behind the through hole, a lifting motor 6 fixedly installed inside the dustproof box 2 located behind the threaded rod 5, the output end of the lifting motor 6 being drivenly connected to the bottom of the threaded rod 5, a lifting frame 7 located inside the dustproof box 2 being threadedly connected through the threaded rod 5, a sample inlet tube 8 fixedly installed on the front of the lifting frame 7 located directly above the through hole 4, a needle tube 9 integrally provided at the bottom of the sample inlet tube 8, an electric push rod 14 fixedly installed inside the dustproof box 2 located on one side of the through hole 4, a drive mechanism rotatably connected inside the dustproof box 2 located on the other side of the through hole 4, a movable plate 15 fixedly installed on the movable end of the electric push rod 14, and a component fixedly installed on the side of the movable plate 15. A first rack 17 is slidably connected inside the dust box 2, and the first rack 17 meshes with one side of the transmission gear 21. A second rack 20 located behind the transmission gear 21 is slidably connected inside the dust box 2, and the second rack 20 meshes with the other side of the transmission gear. Another movable plate 15 is fixedly installed on one end of the second rack 20 facing the through hole 4. Cleaning sponges 16 are detachably installed on the opposite sides of the two movable plates 15. By setting the cleaning sponges 16, when the injection tube 8 moves down to take a sample through the needle tube 9, the electric push rod 14 pushes the movable plate 15 to move towards the through hole 4, and at the same time drives the first gear to move, thereby causing the transmission gear 21 to rotate, driving the second rack 20 to push the other movable plate 15 closer to the through hole 4, so that the two cleaning sponges 16 wrap the needle tube 9. When the injection tube 8 rises, the cleaning sponges 16 clean the sample outside the needle tube 9. At the same time, the presence inside the dust box 2 effectively ensures the cleanliness of the injection needle and improves the practicality of the injector.

[0023] A first bevel gear 12 is fixedly installed at the output end of the lifting motor 6, and a second bevel gear 13 is fixedly installed at the bottom of the threaded rod 5. The first bevel gear 12 and the second bevel gear 13 mesh with each other.

[0024] Inside the dust box 2, guide slide rods 11 are fixedly installed on both sides of the threaded rod 5. The two sides of the lifting frame 7 are slidably connected to the guide slide rods 11. By setting the threaded rod 5, when sampling, the lifting motor 6 drives the threaded rod 5 to rotate, which in turn causes the lifting frame 7 to drive the injection tube 8 to descend along the guide slide rod 11. The needle tube 9 is inserted into the sample bottle placed in the sample rack 3 through the through hole 4 to take a sample. After sampling, the lifting motor 6 reverses and raises the injection tube 8 into the dust box 2.

[0025] The dust box 2 has a sliding groove 18 fixedly installed inside, located in front of the through hole 4, and the first rack 17 is slidably connected to the inside of the sliding groove 18.

[0026] The dust box 2 has a fixedly installed limiting slide groove 19 located behind the transmission gear 21. The inside of the limiting slide groove 19 is slidably connected to the second rack 20.

[0027] The diameter of the through hole 4 is larger than the diameter of the sample inlet tube 8, and the through hole 4 and the sample inlet tube 8 are set on the same axis.

[0028] A connecting hose 10 is provided at the top of the injection tube 8, and the other end of the connecting hose 10 is connected to the inside of the injector body 1.

[0029] Working principle:

[0030] During sampling, the lifting motor 6 drives the threaded rod 5 to rotate, which in turn causes the lifting frame 7 to lower the injection tube 8 along the guide slide 11. The needle 9 is inserted into the sample bottle placed in the sample holder 3 through the through hole 4 to take a sample. After sampling, the lifting motor 6 reverses and raises the injection tube 8 into the dustproof box 2. When the needle 9 is taking a sample, the electric push rod 14 pushes the moving plate 15 to move towards the through hole 4, and at the same time drives the first gear to move, which in turn causes the transmission gear 21 to rotate, which drives the second rack 20 to push another moving plate 15 closer to the through hole 4, so that the two cleaning sponges 16 wrap the needle 9. When the injection tube 8 rises, the cleaning sponges 16 clean the sample outside the needle 9, and at the same time, the inside of the dustproof box 2 effectively ensures the cleanliness of the injection needle.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sample injector for moisture analysis of chemical polyethers, comprising a sample injector body (1), characterized in that, A dustproof box (2) is fixedly installed on the front of the injector body (1). A sample holder (3) is provided at the bottom of the injector body (1) below the dustproof box (2). A through hole (4) is provided at the bottom of the dustproof box (2). A threaded rod (5) located behind the through hole is rotatably connected inside the dustproof box (2). A lifting motor (6) located behind the threaded rod (5) is fixedly installed inside the dustproof box (2). The output end of the lifting motor (6) is connected to the bottom of the threaded rod (5). A lifting frame (7) located inside the dustproof box (2) is threadedly connected through the threaded rod (5). An injection tube (8) located directly above the through hole (4) is fixedly installed on the front of the lifting frame (7). A needle tube (9) is integrally provided at the bottom of the injection tube (8). The dustproof box (2) contains... An electric push rod (14) is fixedly installed on one side of the through hole (4). The dust box (2) is rotatably connected to a transmission located on the other side of the through hole (4). A movable plate (15) is fixedly installed on the movable end of the electric push rod (14). A first rack (17) is fixedly installed on the side of the movable plate (15) and slidably connected to the inside of the dust box (2). The first rack (17) meshes with one side of the transmission gear (21). A second rack (20) is slidably connected to the inside of the dust box (2) and located behind the transmission gear (21). The second rack (20) meshes with the other side of the transmission gear. Another movable plate (15) is fixedly installed on one end of the second rack (20) facing the through hole (4). A cleaning sponge (16) is detachably installed on the opposite sides of the two movable plates (15).

2. A sample injector for water content analysis of chemical polyether according to claim 1, characterized in that, The output end of the lifting motor (6) is fixedly equipped with a first bevel gear (12), and the bottom of the threaded rod (5) is fixedly equipped with a second bevel gear (13). The first bevel gear (12) meshes with the second bevel gear (13).

3. A moisture analyzer sample injector for chemical polyether according to claim 1, characterized in that, The dust box (2) is fixedly installed with guide slide rods (11) on both sides of the threaded rod (5), and the two sides of the lifting frame (7) are slidably connected to the guide slide rods (11).

4. The moisture analyzer sample injector for chemical polyether according to claim 1, characterized in that, The dust box (2) has a sliding groove (18) fixedly installed inside, located in front of the through hole (4), and the first rack (17) is slidably connected to the inside of the sliding groove (18).

5. The moisture analyzer sample injector for chemical polyether according to claim 1, characterized in that, The dust box (2) has a limiting groove (19) fixedly installed inside, located behind the transmission gear (21), and the inside of the limiting groove (19) is slidably connected to the second rack (20).

6. A moisture analyzer sample injector for chemical polyether according to claim 1, characterized in that, The diameter of the through hole (4) is larger than the diameter of the injection tube (8), and the through hole (4) and the injection tube (8) are arranged on the same axis.

7. A moisture analyzer sample injector for chemical polyether according to claim 1, characterized in that, The top of the injection tube (8) is provided with a connecting hose (10), and the other end of the connecting hose (10) is connected to the interior of the injector body (1).

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