A sample return flow assembly

Abstract

The present application relates to a kind of sampling backflow components in chemical industry, including valve seat and sampling cylinder;The valve seat is equipped with sampling port and backflow port, the sampling cylinder is sleeve structure, including sampling cavity and backflow cavity, the valve seat is connected in the sampling pipe top end, the sampling port is communicated with the sampling cavity, the backflow port is communicated with the backflow cavity.The utility model sampling backflow component, by being set in the valve seat the channel that can independently enter and exit material and is mutually isolated, simultaneously cooperate the sleeve type structure of inside and outside sampling cylinder, so that the structure integration of sampling backflow is in the same component, solves the pipeline more, occupies space big and the technical problems such as high cost caused by two groups of separate structure sampling, backflow.

Description

Technical Field

[0001] This invention relates to the chemical industry, and more specifically, to a sampling reflux assembly. Background Technology

[0002] In the chemical industry, sampling intermediate reactants during chemical synthesis to control the process, or sampling reaction products after the reaction to analyze the quality of the results, is a necessary and common practice. After sampling and analysis, the sampled substances are often returned to the reactor through another set of pipelines to achieve the goals of energy conservation, pollution reduction, and prevention of harm.

[0003] In existing technologies, sampling and reflux generally employ two independent sets of valves and pipes. This structure is quite common, but it results in numerous pipes connected to the reactor, placing certain demands on structural space. For example, patent publication number CN219319847U discloses a reactor sampling device, including a reactor and a sampler mounting port located at the top of the reactor. The reactor sampling device is installed on the sampler mounting port and includes a sampler pipette, a sampler pipette valve, a sampling port, a diaphragm pump inlet, a sampling diaphragm pump, a diaphragm pump outlet, a sampling reflux valve, and a sampling reflux pipe. The sampling reflux pipe is installed above the liquid level. The sampler pipette and the sampling reflux pipe are respectively equipped with a sampler pipette valve and a sampling reflux valve. The sampling port is installed between the sampler pipette valve and the sampling diaphragm pump. The diaphragm pump inlet is connected to the sampling port, and the diaphragm pump outlet is connected to the sampling reflux valve. After the sampling device is turned on, the material circulates. Although this technology fixes the sampling and reflux pipelines through the same flange, such a structural design still requires two independent sampling and reflux pipelines. Moreover, opening two holes on the same flange will inevitably increase the flange area, that is, increase the opening area of ​​the reactor body, which is not conducive to the stability and safety of the reaction system. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a sampling reflux assembly.

[0005] A sampling reflux assembly according to the present invention includes a valve seat and a sampling cylinder; The valve seat is provided with a sampling port and a reflux port. The sampling cylinder is a sleeve structure, including a sampling chamber and a reflux chamber. The valve seat is located and connected to the top of the sampling cylinder. The sampling port is connected to the sampling chamber, and the reflux port is connected to the reflux chamber.

[0006] In some embodiments, the valve seat includes a sampling head located in the middle, the sampling head being a tube with a mountain-shaped structure, the lower end of the middle tube of the sampling head communicating with the sampling chamber, the upper end of the middle tube being the sampling port, the cavity outside the middle tube communicating with the reflux chamber, and a reflux head located on the side of the sampling head, one end of the reflux head being the reflux port, and the other end of the reflux head communicating with the cavity outside the middle tube.

[0007] In some embodiments, there are multiple reflux heads connected to the outer periphery of the sampling head.

[0008] In some embodiments, the sampling cylinder includes an inner cylinder and an outer cylinder, the outer cylinder being sleeved outside the inner cylinder, and a cavity for reflux is formed between the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder.

[0009] In some embodiments, the bottom end of the outer cylinder extends radially toward the inner cylinder and is connected and sealed, and the outer cylinder has a discharge port on its side.

[0010] In some embodiments, there are multiple discharge ports, which are spaced apart circumferentially along the outer cylinder.

[0011] In some embodiments, the sampling cylinder is further provided with a protective sleeve, which covers the outer peripheral surface of the outer cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The sampling and reflux assembly of this utility model solves the technical problems of multiple pipelines, large space occupation, and high cost caused by sampling and reflux through two separate structures by setting mutually isolated channels in the valve seat and combining them with the inner and outer sleeve structure of the sampling cylinder.

[0013] 2. The sampling reflux assembly of this utility model solves the technical problem of simultaneous reflux of multiple samples during various tests by optimizing the structural design of the valve seat to include multiple reflux heads, thus effectively expanding the application scenarios. Attached Figure Description

[0014] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the sampling and reflux assembly of this utility model; Figure 2 This is a cross-sectional view of the sampling and reflux assembly of this utility model. Figure 3 This is a frontal perspective view of the valve seat of this utility model; Figure 4 This is a three-dimensional structural diagram of the valve seat of this utility model from the reverse side; Figure 5 This is a cross-sectional view of the valve seat of this utility model. Figure 6 This is a schematic diagram of the structure of the sampling and reflux assembly after connecting the pipeline. Detailed Implementation

[0015] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention. Example

[0016] This embodiment provides a sampling reflux assembly, such as... Figure 1-6 As shown, it includes a valve seat 1 and a sampling cylinder 2 connected and communicating with the valve seat 1.

[0017] like Figure 3-5 As shown, the valve seat 1 has a flange-like structure, including a valve plate 10 with a central through hole. A sampling head 11 is integrally formed on the central through hole of the valve plate 10. The sampling head 11 has a tube structure in the shape of a mountain, including a central tube 111 located in the middle and an annular wall plate 112 located outside the central tube 111. A cavity is formed between the inner circumferential surface of the annular wall plate 112 and the outer circumferential surface of the central tube 111. The sampling head 11 is connected to the central through hole of the valve plate 10 in an inverted manner, and the annular wall plate 112 is connected to the valve plate 10. The upper opening of the central tube 111 is the sampling port 101, located above the upper surface of the valve plate 10, and the lower opening of the central tube 111 is basically flush with the lower surface of the valve plate 10. At this time, the cavity formed between the inner circumferential surface of the central through hole of the valve plate 10 and the cavity formed between the central tube 111 and the annular wall plate 112 are vertically connected and are basically in a straight-through structure. In this embodiment, the side of the sampling head 11 is connected to and communicates with a return head 12, which is located on the valve plate 10. The return head 12 is a tube structure, one end of which is connected to the annular wall plate 112 and communicates with the cavity between the annular wall plate 112 and the central tube 111. The other end of the return head 12 is a return port 102, and the end face of the return port 102 is basically flush with the circumferential surface of the valve plate 10.

[0018] like Figure 1-2As shown, the sampling cylinder 2 is a sleeve structure, including an inner cylinder 21 and an outer cylinder 22. The outer cylinder 22 is sleeved around the inner cylinder 21, and there is a predetermined gap between the outer circumferential surface of the inner cylinder 21 and the inner circumferential surface of the outer cylinder 22, forming a cavity for fluid reflux. In this embodiment, the sampling cylinder 2 is also provided with a sheath 23, which wraps around the outer circumferential surface of the outer cylinder 22. This not only improves the overall structural strength of the sampling cylinder 2, but also enhances its overall corrosion resistance in acidic and alkaline sampling environments by using a sheath 23 made of corrosion-resistant material. In some embodiments, the length of the outer cylinder 22 is shorter than the length of the inner cylinder 21. The bottom of the outer cylinder 22 extends radially toward the inner cylinder 21 to form a closed port, and a discharge port 221 is provided on the lower circumferential surface of the outer cylinder 22. The refluxed material is discharged through the discharge port 221 located on the side of the outer cylinder 22, which avoids some of it being directly taken away by the inner cylinder 21 when discharged from the bottom, thus affecting the subsequent detection accuracy. Furthermore, there are multiple discharge ports 221, which are evenly spaced along the circumference of the outer cylinder 22. For example... Figure 2 and Figure 6 As shown, multiple racetrack-shaped discharge ports 221 are equally spaced at the bottom of the outer cylinder 22. By opening multiple discharge ports 22 at the bottom of the outer cylinder 22, the returned material can be mixed with the sampled material from all directions, improving the uniformity of the mixture.

[0019] The working principle of the sampling and reflux assembly provided by this utility model is as follows: the valve seat 1 is located and connected to the top of the sampling cylinder 2, wherein the upper end of the inner cylinder 21 is sleeved with the middle tube 111, the top surface of the outer cylinder 22 is connected to the lower surface of the valve plate 10, and the cavity between the outer cylinder 22 and the inner cylinder 21 and the cavity between the middle tube 111 and the annular wall plate 112 are connected. The sampling pipeline is connected through the sampling port 101, and the reflux pipeline is connected through the reflux port 102. For example, if the sample is the reaction liquid in the chemical reactor, under the action of negative pressure adsorption, the reaction liquid in the reactor enters from the port of the inner cylinder 21, flows out after passing through the sampling head 11 for testing, and the reaction liquid that has completed testing enters the cavity between the inner cylinder 21 and the outer cylinder 22 through the reflux head 12, and is discharged back into the reactor through the discharge port 221. This embodiment solves the technical problems of multiple pipelines, large space occupation, and high cost caused by sampling and reflux caused by two separate structures for sampling and reflux by setting mutually isolated channels in the valve seat and combining them with inner and outer sleeve-type sampling cylinders. Example

[0020] This second embodiment is based on the first embodiment. By optimizing the valve seat structure to include multiple reflux heads, it solves the technical problem of simultaneous reflux of multiple samples during various tests, effectively expanding the application scenarios. Specifically: Multiple reflux heads 12 are located on the valve seat 1, and all reflux heads 12 are connected and communicate with the sampling head 11. The arrangement of the reflux heads 12 is mainly based on the piping layout of the reactor to be installed. For example, multiple reflux heads 12 can be adjacent or distributed at a certain angle. For example, without special requirements, when three reflux heads 12 are installed, the three reflux heads 12 can be distributed at a 120° interval.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A sample return flow assembly, characterized by, Includes valve seat (1) and sampling cylinder (2); The valve seat (1) is provided with a sampling port (101) and a reflux port (102). The sampling cylinder (2) is a sleeve structure, including a sampling chamber (201) and a reflux chamber (202). The valve seat (1) is located on the top of the sampling cylinder (2). The sampling port (101) is connected to the sampling chamber (201), and the reflux port (102) is connected to the reflux chamber (202).

2. The sampling return assembly of claim 1, wherein, The valve seat (1) includes a sampling head (11) in the middle. The sampling head (11) is a tube with a mountain-shaped structure. The lower end of the middle tube (111) of the sampling head (11) is connected to the sampling chamber (201). The upper end of the middle tube (111) is the sampling port (101). The cavity outside the middle tube (111) is connected to the reflux chamber (202). A reflux head (12) is provided on the side of the sampling head (11). One end of the reflux head (12) is the reflux port (102). The other end of the reflux head (12) is connected to the cavity outside the middle tube (111).

3. The sampling return assembly of claim 2, wherein, There are multiple reflux heads (12), and the multiple reflux heads (12) are connected to the outer periphery of the sampling head (11).

4. The sampling return assembly of any of claims 1-3, wherein, The sampling tube (2) includes an inner tube (21) and an outer tube (22). The outer tube (22) is sleeved outside the inner tube (21), and a cavity for reflux is formed between the outer circumferential surface of the inner tube (21) and the inner circumferential surface of the outer tube (22).

5. The sampling return assembly of claim 4, wherein, The bottom end of the outer cylinder (22) extends radially toward the inner cylinder (21) and is connected and sealed. The outer cylinder (22) has a discharge port (221) on its side.

6. The sampling return assembly of claim 5, wherein, There are multiple discharge ports (221), and the multiple discharge ports (221) are arranged at intervals along the circumference of the outer cylinder (22).

7. The sampling return assembly of claim 4, wherein, The sampling cylinder (2) is also provided with a protective sleeve (23), which covers the outer circumferential surface of the outer cylinder (22).

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