Closed sampling device

Abstract

The utility model discloses a closed sampling device which comprises a material pipe and a sampling bottle, the lower surface of the material pipe is fixedly connected with a positioning cylinder, a bottle opening at the top end of the sampling bottle is inserted into the positioning cylinder, a sealing film is fixed in the bottle opening of the sampling bottle, and a sample discharging needle is fixed on the lower surface of the material pipe and located in the positioning cylinder. And a conical groove is formed in the inner bottom wall of the material pipe. According to the sampling device, the material pipe, the sampling bottle, the positioning barrel, the sample discharging needle, the negative pressure pumping assembly, the plug, the boss, the driving assembly and the supporting assembly are arranged, the top of the sampling bottle is inserted into the positioning barrel, the sample discharging needle can be inserted into the sampling bottle, and the negative pressure pumping assembly is used for pumping negative pressure to the sampling bottle firstly; then the driving assembly drives the plug to be separated from the conical groove in the bottom of the material pipe, the materials can be discharged from the conical groove and enter the sampling bottle along the sample discharging needle, and the device does not need gas supply equipment for nitrogen input, so that the structure of the device is simplified, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical production sampling technology, and in particular to a closed sampling device. Background Technology

[0002] A chemical closed-loop sampler is a device used for the safe and efficient collection of samples during chemical production processes. It is primarily used for toxic, harmful, flammable, explosive, or high-temperature and high-pressure media. Its core design ensures a completely closed sampling process, preventing sample leakage or external contamination, and guaranteeing operator safety and sample accuracy. The device typically consists of a sampling bottle, valves, connecting pipelines, and sealing devices, enabling sampling without interrupting the process flow. Through precise valve control, operators can collect samples in a closed environment, preventing the leakage of harmful substances or the entry of air into the system, thus ensuring sample purity.

[0003] The sealed sampler is connected to the material conveying pipeline at both ends via flanges. During sampling, a matching sampling bottle is inserted into the bottom of the sampler. The sampling needle at the bottom of the sampler punctures the rubber diaphragm inside the bottle opening. Then, the nitrogen inlet valve and the sampler's valve are opened, allowing material in the material conveying pipeline to enter the sampling bottle through the sampling needle. Currently, this type of sealed sampler must be used with a nitrogen system, resulting in a complex sampling device structure and high sampling costs per use. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a closed sampling device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sealed sampling device, comprising a material tube and a sampling bottle, wherein a positioning cylinder is fixedly connected to the lower surface of the material tube, the top opening of the sampling bottle is inserted into the positioning cylinder, and a sealing film is fixed inside the opening of the sampling bottle, a sampling needle is fixed on the lower surface of the material tube and inside the positioning cylinder, a conical groove is formed in the bottom wall of the material tube and communicates with the top of the sampling needle, a vacuuming component for evacuating the sampling bottle is installed on the side wall of the positioning cylinder and the lower surface of the material tube, a plug is provided inside the conical groove, a boss is fixed on the top wall of the material tube above the plug, a driving component for driving the plug to move is provided through the middle of the boss, and a support component is installed on the lower surface of the material tube.

[0006] Furthermore, the negative pressure suction assembly includes a suction pump fixed to the lower surface of the material pipe. The suction port of the suction pump is fixedly connected to a suction pipe. The other end of the suction pipe extends through the side wall of the positioning cylinder into the interior of the positioning cylinder. The end of the suction pipe inside the positioning cylinder is bent downwards, and the bottom of the bent end of the suction pipe is designed with a pointed tip.

[0007] Furthermore, a valve is installed at the end of the extraction pipe near the extraction pump.

[0008] Furthermore, a threaded groove is formed at the top of the center of the boss, and a sliding groove with a diameter larger than the threaded groove is formed at the bottom of the threaded groove. The drive assembly includes a screw that is rotatably connected to the threaded groove by a thread. A sliding rod and a handwheel are fixed at the bottom and top of the screw, respectively. The sliding rod is slidably connected to the sliding groove, and the bottom of the sliding rod is fixedly connected to the plug.

[0009] Furthermore, multiple sealing rings are fixed at equal intervals on the outer wall of the slide rod.

[0010] Furthermore, the support assembly includes a vertical rod fixed to the lower surface of the material tube, and a support plate is rotatably connected to the bottom end of the vertical rod via a bearing, the support plate being located at the bottom of the sampling bottle.

[0011] Furthermore, flanges are fixed at both ends of the material pipe, and the material pipe is connected to the material conveying pipe through the flanges.

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

[0013] In use, this utility model provides a sealed sampling device comprising a material tube, a sampling bottle, a positioning cylinder, a sampling needle, a negative pressure extraction component, a plug, a boss, a drive component, and a support component. The top of the sampling bottle is inserted into the positioning cylinder, and the sampling needle is inserted into the sampling bottle. First, the negative pressure extraction component draws negative pressure into the sampling bottle. Then, the drive component drives the plug to separate from the conical groove at the bottom of the material tube, and the material is discharged from the conical groove and enters the sampling bottle along the sampling needle. This device does not require a gas supply equipment for nitrogen input, thereby simplifying the device structure and reducing operating costs. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 : Overall perspective view of this utility model;

[0016] Figure 2 : Overall sectional view of this utility model;

[0017] Figure 3 The present utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 The present utility model Figure 2 Enlarged view of section B in the middle.

[0019] The attached figures are labeled as follows:

[0020] 1. Material pipe; 101. Conical groove; 2. Sampling bottle; 21. Sealing membrane; 3. Positioning cylinder; 4. Sampling needle; 5. Negative pressure assembly; 51. Air pump; 52. Air extraction pipe; 53. Valve; 6. Plug; 7. Boss; 71. Threaded groove; 72. Slide groove; 8. Drive assembly; 81. Screw; 82. Slide rod; 83. Sealing ring; 84. Handwheel; 9. Support assembly; 91. Vertical rod; 92. Support plate. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-4 As shown, a closed sampling device is disclosed, comprising a material tube 1 and a sampling bottle 2. A positioning cylinder 3 is fixedly connected to the lower surface of the material tube 1. The top opening of the sampling bottle 2 is inserted into the interior of the positioning cylinder 3, and a sealing membrane 21 is fixed inside the opening of the sampling bottle 2. A sampling needle 4 is fixedly installed on the lower surface of the material tube 1 inside the positioning cylinder 3. A conical groove 101 is provided on the bottom wall of the material tube 1, and the conical groove 101 communicates with the top of the sampling needle 4. A vacuum suction component 5 for evacuating the sampling bottle 2 is installed on the side wall of the positioning cylinder 3 and the lower surface of the material tube 1. A plug 6 is provided inside the conical groove 101. A boss 7 is fixed on the top wall of the material tube 1 above the plug 6. A driving component 8 for driving the plug 6 to move is provided through the middle of the boss 7. A support component 9 is installed on the lower surface of the material tube 1.

[0023] The negative pressure assembly 5 includes a vacuum pump 51 fixed to the lower surface of the material pipe 1. The vacuum pump 51 has a vacuum pipe 52 fixedly connected to its suction port. The other end of the vacuum pipe 52 extends through the side wall of the positioning cylinder 3 into the interior of the positioning cylinder 3. The end of the vacuum pipe 52 located inside the positioning cylinder 3 is bent downwards, and the bottom of the bent end of the vacuum pipe 52 is designed with a pointed tip.

[0024] During sampling, the top of the sampling bottle 2 is inserted into the positioning cylinder 3, and the sampling needle 4 and the suction tube 52 simultaneously pass through the sealing membrane 21 and enter the sampling bottle 2. If the suction pump 51 is turned on at this time, negative pressure can be drawn from inside the sampling bottle 2 through the suction tube 52.

[0025] A valve 53 is installed at the end of the air extraction pipe 52 near the air pump 51.

[0026] When using the air pump 51, the valve 53 needs to be opened first. By setting the valve 53, it is possible to prevent materials from entering the air pump 51 along the air extraction pipe 52.

[0027] The top of the boss 7 has a threaded groove 71, and the bottom of the threaded groove 71 has a sliding groove 72 with a diameter larger than the threaded groove 71. The drive assembly 8 includes a screw 81 that is rotatably connected to the threaded groove 71 by a thread. The bottom and top of the screw 81 are respectively fixed to the sliding rod 82 and the handwheel 84. The sliding rod 82 is slidably connected to the sliding groove 72, and the bottom of the sliding rod 82 is fixedly connected to the plug 6.

[0028] By rotating the handwheel 84 at the top of the screw 81, the screw 81 can be moved along the threaded groove 71. The screw 81 then drives the slide bar 82 to move inside the slide groove 72. The slide bar 82 drives the plug 6 to move. When the slide bar 82 moves upward, the plug 6 separates from the conical groove 101, and the material entering the material pipe 1 can be discharged from the conical groove 101 and enter the discharge needle 4. When the slide bar 82 moves downward, the plug 6 blocks the conical groove 101, thereby closing the conical groove 101 and stopping the discharge.

[0029] Multiple sealing rings 83 are fixed at equal intervals on the outer wall of the slide bar 82.

[0030] The sealing ring 83 can increase the sealing between the slide rod 82 and the inner wall of the slide groove 72.

[0031] The support assembly 9 includes a vertical rod 91 fixed to the lower surface of the material tube 1. The bottom end of the vertical rod 91 is rotatably connected to a support plate 92 via a bearing. The support plate 92 is located at the bottom of the sampling bottle 2.

[0032] The tray 92 can rotate at the bottom of the vertical rod 91. When the tray 92 rotates to the bottom of the sampling bottle 2, it can support the sampling bottle 2.

[0033] Both ends of the material pipe 1 are fixed with flanges, and the material pipe 1 is connected to the material conveying pipe through the flanges. The material pipe 1 can be fixedly connected to the material conveying pipe through the flanges.

[0034] Working principle: The material pipe 1 is connected to the chemical material conveying pipeline through a flange. During sampling, the top of the sampling bottle 2 is first inserted into the positioning cylinder 3, so that the sampling needle 4 and the suction pipe 52 both pass through the sealing membrane 21 and are inserted into the sampling bottle 2. Then, the support plate 92 is rotated to the bottom of the sampling bottle 2 to support it. Then, the valve 53 is opened and the suction pump 51 is started. The suction pipe 52 is used to draw negative pressure into the sampling bottle 2. After the negative pressure is drawn, the suction pump 51 and the valve 53 are closed. Then, the handwheel 84 is rotated to drive the screw 81, the slide bar 82 and the plug 6 to move upward, so that the plug 6 separates from the conical groove 101. The material is discharged from the conical groove 101 and enters the sampling bottle 2 along the sampling needle 4. After sampling, the handwheel 84 is rotated in the opposite direction to make the plug 6 descend and close the conical groove 101. Then, the support plate 92 is rotated away from the sampling bottle 2. Finally, the top of the sampling bottle 2 is pulled out from the positioning cylinder 3.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A closed sampling device, comprising a material tube (1) and a sampling bottle (2), characterized in that: A positioning cylinder (3) is fixedly connected to the lower surface of the material tube (1). The top mouth of the sampling bottle (2) is inserted into the positioning cylinder (3), and a sealing film (21) is fixed inside the mouth of the sampling bottle (2). A sampling needle (4) is fixed on the lower surface of the material tube (1) and inside the positioning cylinder (3). A conical groove (101) is opened on the bottom wall of the material tube (1), and the conical groove (101) is connected to the top of the sampling needle (4). A vacuum suction component (5) for evacuating the sampling bottle (2) is installed on the side wall of the positioning cylinder (3) and the lower surface of the material tube (1). A plug (6) is provided inside the conical groove (101). A boss (7) is fixed on the top wall of the material tube (1) and above the plug (6). A driving component (8) for driving the plug (6) to move is provided through the middle of the boss (7). A support component (9) is installed on the lower surface of the material tube (1).

2. The sealed sampling device according to claim 1, characterized in that: The negative pressure assembly (5) includes a vacuum pump (51) fixed to the lower surface of the material pipe (1). The vacuum pump (51) has a vacuum pipe (52) fixedly connected to its suction port. The other end of the vacuum pipe (52) extends through the side wall of the positioning cylinder (3) into the interior of the positioning cylinder (3). The end of the vacuum pipe (52) inside the positioning cylinder (3) is bent downwards, and the bottom of the bent end of the vacuum pipe (52) is designed with a pointed tip.

3. The sealed sampling device according to claim 2, characterized in that: A valve (53) is installed at one end of the air extraction pipe (52) near the air pump (51).

4. The sealed sampling device according to claim 1, characterized in that: The top of the boss (7) is provided with a threaded groove (71), and the bottom of the threaded groove (71) is provided with a sliding groove (72) with a diameter larger than the threaded groove (71). The drive assembly (8) includes a screw (81) that is rotatably connected to the threaded groove (71) by a thread. The bottom and top of the screw (81) are respectively fixed with a sliding rod (82) and a handwheel (84). The sliding rod (82) is slidably connected with the sliding groove (72), and the bottom of the sliding rod (82) is fixedly connected with the plug (6).

5. A closed sampling device according to claim 4, characterized in that: Multiple sealing rings (83) are fixed at equal intervals on the outer wall of the slide rod (82).

6. A sealed sampling device according to claim 1, characterized in that: The support assembly (9) includes a vertical rod (91) fixed to the lower surface of the material tube (1), and a support plate (92) is rotatably connected to the bottom end of the vertical rod (91) via a bearing. The support plate (92) is located at the bottom of the sampling bottle (2).

7. A closed sampling device according to claim 1, characterized in that: Both ends of the material pipe (1) are fixed with flanges, and the material pipe (1) is connected to the material conveying pipe through the flanges.

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