Glycerol triacetate sampling device

Abstract

The utility model provides a glyceryl triacetate sampling device which comprises a sealing cover screwed on a feed port of a sample barrel, the top of the sealing cover is rotatably clamped with a knob, the sealing cover is slidably clamped with a sampling tube along the axis, the sampling tube is in threaded connection with the knob, a piston rod is arranged in the sampling tube in a penetrating manner, and the piston rod is in threaded connection with the knob. A piston hermetically connected with the sampling tube is arranged at the lower end of the piston rod, and the sampling tube can axially slide along the sealing cover by rotating the knob. According to the application, an existing sample barrel is optimized and improved, the rotatable knob is additionally arranged, and the sampling tube can be driven by the knob to extend into the sample barrel by a target depth by virtue of sliding clamping fit of the sampling tube and the sealing cover, so that glyceryl triacetate at the target depth can be sampled under a sealing condition.

Description

Technical Field

[0001] The present application relates to the technical field of sampling equipment, and in particular to a triacetin sampling device. Background Art

[0002] During the triacetin production process, sampling and testing are required to ensure consistent product quality. In practice, sampling is typically performed by directly opening the sample barrel and removing the sample with a sampling spoon. However, because triacetin is partially hygroscopic and susceptible to moisture from the outside air, this introduces an uncertain moisture variable into the sampling process. To address this issue, the inventors have proposed a triacetin sampling device. Utility Model Content

[0003] The purpose of the present application is to provide a triacetin sampling device, which can sample triacetin at a target depth under sealed conditions.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides a triacetin sampling device, comprising a sealing cover screwed onto a feed port of a sample barrel, a knob rotatably engaged with the top of the sealing cover, a sampling tube slidably engaged along an axis on the sealing cover, the sampling tube being threadedly connected to the knob, a piston rod passing through the interior of the sampling tube, a piston sealably connected to the sampling tube being provided at the lower end of the piston rod, and the sampling tube being slidably connected along the axis of the sealing cover by rotating the knob.

[0006] The present application optimizes and improves the existing sample barrel by adding a rotatable knob. By utilizing the sliding engagement between the sampling tube and the sealing cover, the sampling tube can be driven by the knob to extend into the target depth inside the sample barrel, thereby achieving sampling of triacetin at the target depth under sealed conditions.

[0007] In an optional embodiment, the lower end surface of the sealing cover is provided with a slot for engaging the feed port.

[0008] In an alternative embodiment, the clamping groove is configured in a ring shape coaxially arranged with the sealing cover.

[0009] In an optional embodiment, the inner wall of the sealing cover is provided with a limiting groove for snapping the knob.

[0010] In an optional embodiment, the limiting groove is configured as a ring that is coaxially arranged with the sealing cover.

[0011] In an optional embodiment, the inner wall of the sealing cover is further provided with a clamping strip for clamping the sampling tube.

[0012] In an optional embodiment, the clip strip extends entirely along the axial direction of the sealing cover.

[0013] In an optional embodiment, the outer wall of the sampling tube is provided with a sliding groove that is engaged with the clamping strip.

[0014] In an optional embodiment, a sampling cavity is provided at the lower end of the sampling tube.

[0015] In an optional embodiment, a sampling nozzle is provided at the lower end of the sampling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a triacetin sampling device according to an embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of a triacetin sampling device according to an embodiment of the present application;

[0019] Reference numerals:

[0020] 10. Sealing cover;

[0021] 20. Knob;

[0022] 30. Sampling tube;

[0023] 40. Piston rod;

[0024] 50. Sample barrel;

[0025] 11. Card slot;

[0026] 12. Card strip;

[0027] 13. Limiting slot;

[0028] 21. convex edge;

[0029] 31. Chute;

[0030] 32. Sampling cavity;

[0031] 33. Sampling nozzle;

[0032] 41. Piston;

[0033] 51. Feed inlet. DETAILED DESCRIPTION

[0034] Example 1

[0035] See also Figure 1-Figure 2In this embodiment, the triacetin sampling device includes a sealing cover 10 screwed onto the feed port 51 of the sample barrel 50. A knob 20 is rotatably engaged with the top of the sealing cover 10. A sampling tube 30 is slidably engaged with the sealing cover 10 along the axis. The sampling tube 30 is threadedly connected to the knob 20. A piston rod 40 is passed through the interior of the sampling tube 30. A piston 41 is provided at the lower end of the piston rod 40 and is sealedly connected to the sampling tube 30. Rotating the knob 20 can cause the sampling tube 30 to slide along the axial direction of the sealing cover 10.

[0036] This embodiment optimizes and improves the existing sample barrel by adding a rotatable knob 20. By utilizing the sliding engagement between the sampling tube 30 and the sealing cover 10, the sampling tube 30 can be driven by the knob 20 to extend into the target depth inside the sample barrel 50, thereby achieving the sampling of triacetin at the target depth under sealed conditions.

[0037] It should be noted that triacetin is contained in the sample barrel 50, and under normal conditions, an end cap (not shown in the figure) is screwed on the feed port 51 of the sample barrel 50 for sealing. When sampling is performed, the end cap is unscrewed, and then the sealing cap 10 of this embodiment is screwed on the feed port 51. When the sampling is completed, the end cap needs to be reinstalled on the feed port 51. That is, when sampling is performed, the sealing cap 10 of this embodiment is used to replace the traditional end cap to seal the feed port 51, thereby achieving the purpose of sampling under sealed conditions.

[0038] In this embodiment, optionally, a slot 11 for clamping the feed port 51 is provided on the lower end face of the sealing cover 10, and the slot 11 is constructed into a ring coaxially arranged with the sealing cover 10. Specifically, a thread is provided on the outer wall of the slot 11, and a thread is provided on the outer wall of the feed port 51. The thread in the slot 11 is screwed together with the thread on the feed port 51. When the sealing cover 10 is screwed onto the feed port 51, the feed port 51 is clamped inside the slot 11 as a whole.

[0039] In addition, a limiting groove 13 for clamping the knob 20 is provided on the inner wall of the sealing cover 10, and the limiting groove 13 is constructed into a ring shape coaxially arranged with the sealing cover 10. A clamping strip 12 for clamping the sampling tube 30 is also provided on the inner wall of the sealing cover 10, and the clamping strip 12 extends along the axial direction of the sealing cover 10 as a whole. The clamping strip 12 is arranged below the limiting groove 13, and the knob 20 is kept coaxially with the sealing cover 10 as a whole. An outwardly protruding annular ridge 21 is provided on the outer edge of the lower end of the knob 20, and the ridge 21 is adaptively clamped in the limiting groove 13, so that the knob 20 can be rotatably locked on the sealing cover 10, and the sampling tube 30 is kept coaxial with the sealing cover 10 and the knob 20 as a whole. The sampling tube 30 passes through the knob 20 and the sealing cover 10 in sequence along the axis, and the sampling tube 30 is threadedly connected to the knob 20. A slide groove 31 is provided on the outer wall of the sampling tube 30 to be engaged with the clamping strip 12. The slide groove 31 is formed on the outer wall of the sampling tube 30 and is arranged parallel to the axis of the sampling tube 30. The sliding engagement between the clamping strip 12 and the slide groove 31 allows the sampling tube 30 to only slide along the axial direction of the sealing cover 10. At the same time, the threaded connection between the knob 20 and the sampling tube 30 is utilized. When the knob 20 is turned, the sampling tube 30 can be driven to move along the axial direction of the sealing cover 10, thereby extending the sampling tube 30 to the target depth inside the sample barrel 50.

[0040] In addition, a sampling chamber 32 is provided at the lower end of the sampling tube 30, and a sampling nozzle 33 is provided at the lower end of the sampling chamber. The piston 41 can be slidably engaged in the sampling chamber 32, and the outer wall of the piston 41 is sealed with the inner wall of the sampling chamber 32. The piston rod 40 is fixedly connected to the upper part of the piston 41, and the top of the piston rod 40 extends to the top of the sampling tube 30. The piston 41 and the piston rod 40 move synchronously with the sampling tube 30. When the sampling nozzle 33 moves with the sampling tube 30 into the sample barrel 50 and moves to the target depth, pulling the piston rod 40 outward can drive the piston 41 to move upward in the sampling chamber 32, so that the triacetin at the target depth can be extracted into the sampling chamber 32 to complete the sampling operation.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A triacetin sampling device, characterized in that: It includes a sealing cover that is screwed onto the feed port of the sample barrel, a knob is rotatably engaged with the top of the sealing cover, a sampling tube is slidably engaged with the sealing cover along the axis, the sampling tube is threadedly connected to the knob, a piston rod is passed through the interior of the sampling tube, and a piston is provided at the lower end of the piston rod that is sealed with the sampling tube. Rotating the knob can make the sampling tube slide along the axial direction of the sealing cover.

2. The triacetin sampling device according to claim 1, wherein: The lower end surface of the sealing cover is provided with a clamping groove for clamping the feed port.

3. The triacetin sampling device according to claim 2, wherein: The clamping groove is configured in an annular shape coaxially arranged with the sealing cover.

4. The triacetin sampling device according to claim 3, wherein: The inner wall of the sealing cover is provided with a limiting groove for clamping the knob.

5. The triacetin sampling device according to claim 4, wherein: The limiting groove is configured in a ring shape coaxially arranged with the sealing cover.

6. The triacetin sampling device according to claim 5, wherein: The inner wall of the sealing cover is also provided with a clamping strip for clamping the sampling tube.

7. The triacetin sampling device according to claim 6, wherein: The clamping strip extends as a whole along the axial direction of the sealing cover.

8. The triacetin sampling device according to claim 7, wherein: The outer wall of the sampling tube is provided with a sliding groove which is clamped with the clamping strip.

9. The triacetin sampling device according to claim 8, wherein: A sampling cavity is provided at the lower end of the sampling tube.

10. The triacetin sampling device according to claim 9, wherein: A sampling mouth is provided at the lower end of the sampling cavity.

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