A sampling pipette device for a combined polyether

Abstract

The utility model belongs to experimental equipment technical field provides a kind of combination polyether is with sampling pipetting device, including the cylinder main body of top opening, and with the coaxial arrangement pivot of cylinder main body;The cylinder main body top is provided with the support fixedly connected with it, the cylinder main body bottom wall is equipped with sampling pipetting mouth, the pivot bottom end portion is provided with the sealing baffle compatible with sampling pipetting mouth, the pivot top end is movably connected with the support, and its bottom end is movably connected with the cylinder main body bottom wall.The combination polyether sampling pipetting device provided by the utility model is simple in structure and convenient to use, reduces the difficulty and complexity of combination polyether sampling pipetting operation, and improves the sampling pipetting efficiency of combination polyether.

Description

Technical Field

[0001] This utility model belongs to the field of experimental equipment technology, and specifically relates to a sampling and pipetting device for combined polyethers. Background Technology

[0002] Polyether blends, commonly known as "white material," are a two-component raw material for producing rigid polyester foam. They are composed of monomeric polyethers, blowing agents, crosslinking agents, catalysts, and foam leveling agents, and are present as a brownish-yellow viscous liquid. According to Chapter 6.1 of the standard HJ1057-2019, "Determination of Ozone-Depleting Substances such as HCFC-22, CFC-11, and HCFC-141b in Polyether Blended Materials by Headspace Gas Chromatography-Mass Spectrometry," the polyether blend is collected from the original storage container using a sampling spoon. However, in actual sampling, the high viscosity of the polyether makes sampling and pipetting difficult. Firstly, the handle of the sampling spoon is short, limiting its insertion depth into the storage container. Secondly, the viscous liquid polyether adheres to the outer wall of the sampling spoon, easily splashing and dripping during transfer. Furthermore, since the polyether blend contains volatile ozone-depleting controlled substances such as CFC-11 or HCFC-141b, the sampling process should minimize or avoid exposure of the sample to the air. However, the existing sampling spoons obviously cannot avoid or reduce the exposure of the sample.

[0003] Therefore, it is necessary to design a combined polyether sampling and pipetting device that can at least solve some of the above problems and defects. Summary of the Invention

[0004] To solve the above technical problems, this utility model proposes a sampling and pipetting device for combined polyethers. It has a simple structure and is easy to use, which reduces the difficulty and complexity of sampling and pipetting operations for combined polyethers and improves the sampling and pipetting efficiency of combined polyethers.

[0005] The technical solution of this utility model is:

[0006] This utility model proposes a sampling and pipetting device for combined polyethers, including a cylindrical body with a top opening and a rotating shaft arranged coaxially with the cylindrical body;

[0007] The top of the cylinder body is provided with a bracket fixedly connected thereto. The bottom wall of the cylinder body is provided with a sampling pipetting port. The bottom end of the rotating shaft is provided with a sealing baffle adapted to the sampling pipetting port. The top end of the rotating shaft is movably connected to the bracket, and its bottom end is movably connected to the bottom wall of the cylinder body.

[0008] Preferably, the support includes four side plate frames evenly spaced along the circumferential direction with the axis of the cylinder body as the center, and a top plate frame fixedly installed at the top of the side plate frames.

[0009] Preferably, the bottom wall of the cylinder body is provided with a receiving cavity adapted to the sealing baffle, so that the sealing baffle can be rotatably embedded into the receiving cavity;

[0010] The top of the rotating shaft passes through the top plate frame and extends upward, and its end is provided with a rotating handle that is fixedly connected to it.

[0011] Preferably, the sampling and pipetting device for combined polyethers provided by this utility model further includes a lifting and lowering sealing disc disposed above the top opening of the cylinder body. The sealing disc is movably sleeved on the outer periphery of the rotating shaft and is adapted to the inner wall of the cylinder body.

[0012] Preferably, the outer ring of the sealing disc is provided with at least one sealing ring sleeve that is detachably connected thereto.

[0013] Preferably, a bushing is fixedly connected to the sealing disc above it, and a horizontal lever is fixedly connected to the bushing at its end. Both the bushing and the lever are movably sleeved on the outer circumference of the rotating shaft.

[0014] Two symmetrically arranged side plate frames are provided with first guide grooves arranged parallel to the axis of the cylinder body, and the two ends of the lever are movably embedded in the first guide grooves.

[0015] Preferably, the sampling and pipetting device for combined polyethers provided by this utility model further includes a scraping ring movably sleeved on the outer periphery of the cylinder body. The inner wall of the scraping ring is adapted to the outer wall of the cylinder body, and the bottom of the scraping ring is provided with a ring blade whose thickness gradually decreases from top to bottom along the axial direction of the cylinder body.

[0016] Preferably, two guide rods are fixedly connected to the scraping ring above it, and the two guide rods are symmetrically distributed about the axis center of the cylinder body;

[0017] Two symmetrically distributed side plate frames are provided with second guide grooves arranged parallel to the axis of the cylinder body, and the guide rod is provided with a guide block that is movably embedded in the second guide groove.

[0018] This utility model has the following advantages and effects compared with the prior art:

[0019] (1) The main body of the cylinder with a sampling pipetting port on the bottom wall and a sealing baffle that is compatible with the sampling pipetting port are adopted. The opening and sealing of the sampling pipetting port are achieved by rotating the rotating shaft to drive the sealing baffle to rotate, so as to avoid the splashing and dripping of the sample liquid during the pipetting process, reduce the difficulty and complexity of the sampling pipetting operation, and improve the efficiency and safety of the sampling pipetting operation.

[0020] (2) A lifting and lowering sealing plate is used above the top opening of the cylinder body, and the sealing plate is adapted to the inner wall of the cylinder body so that the sealing plate can slide into the inner cavity of the cylinder body, thereby achieving the sealing of the cylinder body during the liquid transfer process, thereby avoiding and reducing the exposure of the combined polyether sample liquid to the air. At the same time, the sample liquid can be injected into the sample bottle by pushing the sealing plate downward, which is flexible and convenient to use.

[0021] (3) A scraping ring is used to attach to the outer circumference of the cylinder body. After the cylinder body is inserted into the original storage container of the polyether combination to complete the sampling of the sample liquid, the viscous liquid of the polyether combination adhering to the outer wall of the cylinder body can be scraped off by pushing the scraping ring downward, thereby avoiding the splashing and dripping of liquid during the transfer process and the resulting environmental pollution. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the sampling and pipetting device for combined polyethers in an embodiment of this utility model;

[0023] Figure 2 for Figure 1 Enlarged structural diagram at position A in the middle;

[0024] Figure 3 This is another schematic diagram of the sampling and pipetting device for combined polyethers in this embodiment of the present invention;

[0025] Figure 4 for Figure 3 A magnified structural diagram at position B in the middle.

[0026] Reference numerals: 1. Cylinder body; 11. Sampling and pipetting port; 12. Receiving cavity; 2. Rotating shaft; 21. Sealing baffle; 22. Rotating handle; 3. Support; 31. Side plate support; 32. Top plate support; 33. First guide groove; 34. Second guide groove; 4. Sealing disc; 41. Sealing ring sleeve; 5. Bushing; 6. Toggle lever; 61. Toggle handle; 7. Scraping ring; 71. Ring blade; 8. Guide rod; 81. Guide block. Detailed Implementation

[0027] To enable those skilled in the art to better understand this utility model, it will now be further described in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0028] Example:

[0029] like Figures 1-4As shown, this utility model provides a sampling and pipetting device for combined polyethers, which includes a cylindrical body 1 with a top opening and a rotating shaft 2 coaxially arranged with the cylindrical body 1. A support 3 is fixedly connected to the top of the cylindrical body 1. Specifically, the support 3 includes four side plate frames 31 evenly spaced along the circumferential direction with the axis of the cylindrical body 1 as the center, and a top plate frame 32 fixedly arranged at the top of the side plate frames 31.

[0030] Optionally, in some embodiments, the top plate frame 32, the side plate frame 31, and the cylinder body 1 are connected in an integral structure.

[0031] refer to Figure 3 and Figure 4 As shown, the bottom wall of the cylinder body 1 is provided with a sampling pipetting port 11. The bottom of the rotating shaft 2 is rotatably embedded in the bottom wall of the cylinder body 1, and its bottom end is provided with a sealing baffle 21 that is adapted to the sampling pipetting port 11. By rotating the rotating shaft 2, the sealing baffle 21 is rotated, thereby opening or blocking the sampling pipetting port 11. The bottom wall of the cylinder body 1 is provided with a receiving cavity 12 that is adapted to the sealing baffle 21, so that the sealing baffle 21 can rotate and be completely embedded in the receiving cavity 12, thereby making the sampling pipetting port 11 completely open for sampling or pipetting.

[0032] The top of the rotating shaft 2 passes through the top plate frame 32 of the bracket 3 and extends upward, and a rotating handle 22 is fixedly connected to its top end so that the operator can grasp and hold the rotating handle 22 to rotate the rotating shaft 2.

[0033] Furthermore, in combination Figure 1 and Figure 2 As shown, the sampling and pipetting device for combined polyether in this embodiment also includes a lifting and lowering sealing disk 4 disposed above the top opening of the cylinder body 1. The sealing disk 4 is movably sleeved on the outer periphery of the rotating shaft 2 and is adapted to the inner wall of the cylinder body 1. At least one sealing ring sleeve 41 is provided on the outer ring of the sealing disk 4 so that the sealing disk 4 is sealed against the inner wall of the cylinder body 1, thereby achieving sealing and plugging at the top opening of the cylinder body 1.

[0034] A bushing 5 is fixedly connected to the sealing disc 4 above it. A horizontal lever 6 is fixedly connected to the end of the bushing 5 vertically. Both the bushing 5 and the lever 6 are movably sleeved on the outer circumference of the rotating shaft 2. Two side plate frames 31 arranged symmetrically are provided with a first guide groove 33 arranged parallel to the axis of the cylinder body 1. The two ends of the lever 6 are movably embedded in the first guide groove 33, and the two ends of the lever 6 are provided with outwardly protruding actuating handles 61, so that the operator can drive the sealing disc 4 to move axially up and down by pushing the actuating handles 61, thereby realizing the opening and closing of the top opening of the cylinder body 1.

[0035] Furthermore, in combination Figure 1 and Figure 3As shown, the sampling and pipetting device for combined polyether in this embodiment also includes a scraping ring 7 movably sleeved on the outer periphery of the cylinder body 1. The inner wall of the scraping ring 7 is adapted to the outer wall of the cylinder body 1 so as to scrape off the combined polyether sample liquid adhering to the outer wall of the cylinder body 1. The bottom of the scraping ring 7 is provided with a ring blade 71 whose thickness gradually decreases from top to bottom along the axial direction of the cylinder body 1. Specifically, in this embodiment, the cutting surface of the ring blade 71 is concave arc-shaped so that the viscous combined polyether sample liquid scraped off will automatically fall off after passing through the ring blade 71 and will not accumulate upwards.

[0036] Two guide rods 8 are fixedly connected to the scraping ring 7 above it. The two guide rods 8 are symmetrically distributed about the axis of the cylinder body 1. Another set of two symmetrically distributed side plate frames 31 are provided with second guide grooves 34 arranged parallel to the axis of the cylinder body 1. The top end of the guide rod 8 is provided with a guide block 81 that is movably embedded in the second guide groove 34, so that the operator can push the guide block 81 and the guide rod 8 to realize the axial lifting and lowering movement of the scraping ring 7, thereby scraping and wiping away the viscous polyether sample liquid adhering to the outer wall of the cylinder body 1.

[0037] In practical use, the operator rotates the rotating shaft 2 using the rotating handle 22, causing the sealing baffle 21 to be fully inside the receiving cavity 12 at the bottom of the main body 1. At this time, the sampling pipette port 11 is fully open. Simultaneously, the operator adjusts the position of the lever 6 and the sealing plate 4 by using the toggle handle 61, so that the sealing plate 4 is above the top opening of the main body 1, and the top opening of the main body 1 is in an open state. The operator adjusts the position of the guide rod 8 and the scraper ring 7 by using the guide block 81, so that the scraper ring 7 is positioned close to the top opening of the main body 1. The main body 1 with the sampling pipette port 11 open is slowly inserted into the original storage container containing the combined polyether. The combined polyether sample liquid is poured into the cavity of the main body 1 through the sampling pipette port 11. After being inserted to a certain depth (the top opening of the main body 1 and the scraper ring 7 are above the surface of the combined polyether liquid), the operator rotates the rotating handle 22 and the rotating shaft 2, so that... The sealing baffle 21 rotates to seal the sampling pipetting port 11, at which point the sampling pipetting port 11 at the bottom of the main body 1 is in a sealed state. Pulling the entire device upward causes the bottom of the main body 1 to detach from the polyether liquid surface. By pushing the sealing plate 4 downward through the lever 61, the sealing plate 4 seals the top opening of the main body 1. By pushing the scraping ring 7 downward through the guide block 81 or guide rod 8, the scraping ring 7 scrapes away the polyether sample liquid adhering to the outer wall of the main body 1. The entire device is then moved to the top of the sample bottle. By rotating the rotating shaft 2 and the sealing baffle 21 through the rotating handle 22, the sampling pipetting port 11 is opened. At this point, the polyether sample liquid can automatically flow into the sample bottle below by its own gravity, or the polyether sample liquid inside the main body 1 can be pushed and injected into the sample bottle by pushing the sealing plate 4 downward, thus completing the sampling and pipetting operation of the polyether sample liquid.

[0038] It should be noted that, given the high viscosity of the combined polyether sample solution, during the actual sampling process, the sealing disc 4 can be pushed downwards to a position close to the sampling port 11 at the bottom of the main body 1. After inserting the bottom of the main body 1 into the original storage container for storing the combined polyether sample solution, the sealing disc 4 can be slid upwards by pulling the lever 61 and the lever 6, thereby achieving a sampling similar to that of a syringe, thus improving the sampling efficiency.

[0039] In summary, the sampling and pipetting device for combined polyethers provided by this utility model has a simple structure and is easy to use, reducing the difficulty and complexity of sampling and pipetting operations for combined polyethers and improving the sampling and pipetting efficiency of combined polyethers.

[0040] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sampling and pipetting device for composite polyethers, characterized in that: It includes a cylindrical body (1) with an opening at the top, and a rotating shaft (2) that is coaxially arranged with the cylindrical body (1). The top of the cylinder body (1) is provided with a bracket (3) fixedly connected thereto. The bottom wall of the cylinder body (1) is provided with a sampling pipetting port (11). The bottom end of the rotating shaft (2) is provided with a sealing plate (21) adapted to the sampling pipetting port (11). The top end of the rotating shaft (2) is movably connected to the bracket (3), and its bottom end is movably connected to the bottom wall of the cylinder body (1).

2. The sampling and pipetting device for combined polyethers according to claim 1, characterized in that: The support (3) includes four side plate frames (31) evenly spaced along the circumferential direction with the axis of the cylinder body (1) as the center, and a top plate frame (32) fixedly installed at the top of the side plate frames (31).

3. The sampling and pipetting device for combined polyethers according to claim 2, characterized in that: The bottom wall of the cylinder body (1) is provided with a receiving cavity (12) that is adapted to the sealing plate (21), so that the sealing plate (21) can be rotatably embedded into the receiving cavity (12); The top of the rotating shaft (2) passes through the top plate frame (32) and extends upward, and its end is provided with a rotating handle (22) fixedly connected to it.

4. The sampling and pipetting device for combined polyethers according to claim 2, characterized in that: It also includes a lifting and lowering sealing disc (4) disposed above the top opening of the cylinder body (1), the sealing disc (4) being movably sleeved on the outer periphery of the rotating shaft (2) and adapted to the inner wall of the cylinder body (1).

5. The sampling and pipetting device for combined polyethers according to claim 4, characterized in that: The outer ring of the sealing disc (4) is provided with at least one sealing ring sleeve (41) that is detachably connected thereto.

6. The sampling and pipetting device for combined polyethers according to claim 4, characterized in that: A bushing (5) is fixedly connected to the sealing disc (4) above it, and a horizontal lever (6) is fixedly connected to the bushing (5) at the end of the bushing (5) vertically. Both the bushing (5) and the lever (6) are movably sleeved on the outer circumference of the rotating shaft (2). Two symmetrically arranged side plate frames (31) are provided with a first guide groove (33) arranged parallel to the axis of the cylinder body (1), and the two ends of the lever (6) are movably embedded in the first guide groove (33).

7. The sampling and pipetting device for combined polyethers according to claim 2, characterized in that: It also includes a scraping ring (7) that is movably sleeved on the outer periphery of the cylinder body (1). The inner wall of the scraping ring (7) is adapted to the outer wall of the cylinder body (1). The bottom of the scraping ring (7) is provided with a ring blade (71) whose thickness gradually decreases from top to bottom along the axial direction of the cylinder body (1).

8. The sampling and pipetting device for combined polyethers according to claim 7, characterized in that: Two guide rods (8) are fixedly connected to the scraping ring (7) above it, and the two guide rods (8) are symmetrically distributed about the axis center of the cylinder body (1); Two symmetrically distributed side plate frames (31) are provided with second guide grooves (34) arranged parallel to the axis of the cylinder body (1), and the guide rod (8) is provided with guide blocks (81) that are movably embedded in the second guide grooves (34).

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