Online continuous sampling device

Abstract

The utility model discloses an online continuous sampling device, which comprises a sampling valve arranged on a liquid main pipeline, the sampling valve comprises a valve body, a sampling port arranged on the valve body and a knob switch arranged on the valve body and used for opening or closing the sampling port, the sampling valve is fixedly connected with an assembly joint at the sampling port, and the assembly joint is fixedly connected with the valve body. The assembly joint is provided with a fluid channel in butt joint with the sampling port, and the lower end of the assembly joint is provided with a sample quantification unit in butt joint with the fluid channel and a sampling unit in butt joint with the sample quantification unit. According to the utility model, the sample quantifying unit is arranged between the sampling valve and the sampling unit, the flow meter is utilized to accurately meter the quantity of samples entering the sample bottle, and the samples are conveyed into the sample bottle at one time through the ball valve after the quantitative sampling of the sample bottle is completed, so that online time-phased or continuous accurate quantitative and constant-volume sampling is realized, the structure is simple, and the operation is convenient. The sampling is convenient, fast, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of chemical sampling technology, specifically to an online continuous sampling device. Background Technology

[0002] Online sampling involves installing a sampling valve on the main liquid pipeline, with the valve's sampling port connected to a sampling bottle to perform the sampling operation. However, when it is necessary to ensure the controllability of the liquid quality within the main pipeline, sampling needs to be conducted at different time periods to expand the sampling range and thus improve the accuracy of the samples.

[0003] Currently, online sampling relies on staff operation. In addition, the sampling bottle collects liquids only once, and it is not possible to continuously collect samples in different time periods. This makes it impossible to obtain a continuous sample at once, which increases the workload of staff. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides an online continuous sampling device to achieve one-time sampling after online continuous sampling.

[0005] The technical solution adopted by this utility model to solve its technical problem is to provide an online continuous sampling device, including a sampling valve provided on a liquid main pipeline. The sampling valve includes a valve body, a sampling port provided on the valve body, and a rotary switch provided on the valve body for opening or closing the sampling port. The sampling valve is fixedly connected to an assembly joint at its sampling port. The assembly joint has a fluid channel that connects to the sampling port. The lower end of the assembly joint is provided with a sample quantification unit that connects to the fluid channel and a sampling unit that connects to the sample quantification unit.

[0006] The sample quantification unit includes a flow meter, a sample bottle, and a ball valve. The flow meter is located between the assembly joint and the sample bottle and is used to accurately measure the amount of sample entering the sample bottle through the fluid channel. The ball valve is located on the liquid outlet at the bottom of the sample bottle and is used to open or close the liquid outlet.

[0007] The sampling unit includes a needle valve adapter that docks with the ball valve, and a bottle positioning structure provided on the needle valve adapter for positioning the sampling bottle. The needle valve adapter is provided with a sampling needle that communicates with the flow channel of the ball valve, and the bottle cap of the sampling bottle is provided with a rubber membrane that can be pierced by the sampling needle.

[0008] As a further improvement of this utility model, the liquid outlet of the sample bottle and the flow channel of the ball valve are coaxially arranged with the fluid channel. The sample bottle is provided with a connecting pipe at its liquid outlet. The inlet of the flow channel of the ball valve is sealed to the connecting pipe, and the outlet of the flow channel of the ball valve is sealed to the needle valve adapter.

[0009] As a further improvement of this utility model, the ball valve body is provided with a handle, the handle having a driving part and a connecting part connected to the valve stem of the ball valve;

[0010] The connecting part is a quarter-circle disc-shaped structure, with two mutually perpendicular right-angled walls respectively provided with limiting members along its radial direction, and an arc-shaped guide wall between the two limiting members. The driving part is connected to one of the right-angled walls of the connecting part.

[0011] A limiting block is provided on the outer wall of the valve body facing the handle. The limiting block cooperates with the two limiting members to allow the handle to rotate between 0° and 90°.

[0012] As a further improvement of this utility model, a pressure relief port is provided on one side of the needle valve adapter, and two sampling needles are provided, one of which is connected to the flow channel outlet of the ball valve, and the other is connected to the pressure relief port.

[0013] As a further improvement of this utility model, the bottle positioning structure includes a bottle protective cover and a bottle holder disposed at the lower end of the bottle protective cover and movably connected thereto. The bottle protective cover and the bottle holder form a accommodating space for positioning the sampling bottle.

[0014] The bottle protective cover is a cylindrical cavity structure. Its top end face is provided with a connection port adapted to the needle valve adapter, and the lower outer peripheral wall is provided with two connecting shafts. The two connecting shafts are arranged in a mirror symmetrical arrangement with the central axis of the bottle protective cover as the axis of symmetry.

[0015] The bottle holder has a U-shaped structure, and the upper end of its vertical section is provided with a connecting hole that is compatible with the two connecting shafts.

[0016] As a further improvement of this utility model, a nitrogen purging unit is provided on one side of the assembly joint. The nitrogen purging unit includes a purging pipe. The inlet end of the purging pipe is connected to a nitrogen source, and the outlet end is connected to the assembly joint and communicates with the fluid channel. A pressure regulating valve and an on / off valve are sequentially provided on the purging pipe from the inlet end to the outlet end.

[0017] The beneficial effects of this utility model are: by setting a sample quantification unit between the sampling valve and the sampling unit, the flow meter is used to accurately measure the amount of sample entering the sample bottle, and after the sample bottle completes online continuous sampling, the sample is transported to the sampling bottle in one go through the ball valve, realizing online time-segmented continuous accurate quantitative and volumetric sampling. The structure is simple, the sampling is convenient and fast, and it is safe and reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded structural diagram of the present invention;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the ball valve of this utility model.

[0022] Referring to the accompanying drawings, the following explanations are provided:

[0023] 1. Sampling valve; 101. Valve body; 102. Sampling port; 103. Rotary switch;

[0024] 104. Assembly joint; 1041. Fluid channel; 2. Sample quantification unit; 201. Flow meter; 202. Sample bottle; 2021. Outlet; 2022. Connecting pipe; 203. Ball valve; 2031. Flow channel inlet; 2032. Flow channel outlet; 2033. Valve body; 20331. Limiting block; 2034. Handle; 20341. Drive unit; 20342. Connecting part; 20343. Limiting element; 20344. Guide wall; 2035. Valve 3. Sampling unit; 301. Needle valve adapter; 3011. Sampling needle; 3012. Pressure relief port; 302. Bottle positioning structure; 3021. Bottle protective cover; 30211. Connection port; 30212. Connection shaft; 3022. Bottle holder; 30221. Connection hole; 3023. Accommodation space; 4. Sampling bottle; 401. Bottle cap; 4011. Rubber membrane; 5. Nitrogen purging unit; 501. Purging gas pipe; 502. Pressure regulating valve; 503. Opening and closing valve. Detailed Implementation

[0025] The preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] See Figure 1 Reference numeral 1 indicates an exemplary embodiment of the sampling valve 1, which is disposed on a main liquid pipeline for obtaining sample liquid from the main pipeline. The sampling valve 1 includes a valve body 101, a sampling port 102 disposed on the valve body 101, and a rotary switch 103 disposed on the valve body 101 for opening or closing the sampling port 102. In existing systems, the lower end of the rotary switch 103 is provided with a plunger adapted to the sampling port 102, so that the plunger moves up and down when the rotary switch 103 is rotated, thereby opening or closing the sampling port 102.

[0027] Note: Sampling valve 1 is a plunger-type sampling valve, and its working principle is the same as existing technology, so it will not be described in detail here.

[0028] See Figures 1 to 4The difference between this utility model and the prior art is that: the sampling valve 1 is fixedly connected to an assembly connector 104 at its sampling port 102. The assembly connector 104 has a fluid channel 1041 that connects to the sampling port 102. The lower end of the assembly connector 104 is provided with a sample quantification unit 2 that connects to the fluid channel 1041, and a sampling unit 3 that connects to the sample quantification unit 2. By setting the sample quantification unit 2 between the sampling valve 1 and the sampling unit 3, the sampling process is not only simplified, but also the sample liquid can be continuously obtained from the main pipeline through the sample quantification unit 2, expanding the sampling range of the sample. At the same time, the amount of sample entering the sampling unit 3 can be precisely controlled. The online continuous sampling is completed first by using the sample quantification unit 2, and then the sampling unit 3 is used to achieve one-time sampling.

[0029] Specifically, the sample quantification unit 2 includes a flow meter 201, a sample bottle 202, and a ball valve 203. The flow meter 201 is located between the assembly joint 104 and the sample bottle 202, and is used to accurately measure the amount of sample entering the sample bottle 202 through the fluid channel 1041. The ball valve 203 is located on the liquid outlet 2021 at the bottom of the sample bottle 202 and is used to open or close the liquid outlet 2021. The liquid outlet 2021 of the sample bottle 202 and the flow channel of the ball valve 203 are both coaxially arranged with the fluid channel 1041. Specifically, the sample bottle 202 has a connecting pipe 2022 at its liquid outlet 2021. The flow channel inlet 2031 of the ball valve 203 is sealed to the connecting pipe 2022, and the flow channel outlet 2032 of the ball valve 203 is sealed to the needle valve adapter 301. In this embodiment, the flow meter 201 is an electromagnetic flow meter, which can automatically complete the measurement function and display the corresponding measurement data. It can be used in conjunction with the control unit (not shown) to enable the device to take multiple samples at once or take multiple samples at regular intervals.

[0030] Furthermore, the ball valve 203 has a handle 2034 on its valve body 2033. The handle 2034 has a drive part 20341 and a connecting part 20342 that is connected to the valve stem 2035 of the ball valve 203.

[0031] The connecting part 20342 has a quarter-circle disc-shaped structure. Two right-angled walls that are perpendicular to each other are respectively provided with limiting members 20343 along their radial direction. Between the two limiting members 20343 is an arc-shaped guide wall 20344. The driving part 20341 is connected to one of the right-angled walls of the connecting part 20342.

[0032] A limiting block 20331 is provided on the outer wall of the valve body 2033 facing the handle 2034. The limiting block 20331 cooperates with two limiting members 20343 to allow the handle 2034 to rotate between 0° and 90°.

[0033] Note: The internal structure of ball valve 203 is existing technology. The difference between this embodiment of ball valve 203 and the existing technology is that the valve body 2033 and the handle 2034 of ball valve 203 are provided with mutually cooperating limiting blocks 20331 and limiting members 20343 to control the handle 2034 to rotate within a specific angle range, thereby realizing the opening or closing of ball valve.

[0034] In addition, the sampling unit 3 includes a needle valve adapter 301 that docks with the ball valve 203, and a bottle positioning structure 302 provided on the needle valve adapter 301 for positioning the sampling bottle 4. The needle valve adapter 301 is provided with a sampling needle 3011 that communicates with the flow channel of the ball valve 203, and the bottle cap 401 of the sampling bottle 4 is provided with a rubber membrane 4011 that can be pierced by the sampling needle 3011.

[0035] Furthermore, a pressure relief port 3012 is provided on one side of the needle valve adapter 301, and two sampling needles 3011 are provided, one of which is connected to the flow channel outlet 2032 of the ball valve 203, and the other is connected to the pressure relief port 3012. That is, when the sampling needle 3011 connected to the ball valve 203 transports the liquid sample from the sample bottle 202 to the sampling bottle 4, the air inside the bottle is compressed upward by the liquid and discharged from the sampling bottle 4 through the sampling needle connected to the pressure relief port 3012, preventing the pressure inside the bottle from increasing.

[0036] Furthermore, the bottle positioning structure 302 includes a bottle protective cover 3021 and a bottle holder 3022 located at the lower end of the bottle protective cover 3021 and movably connected thereto. The bottle protective cover 3021 and the bottle holder 3022 together form a accommodating space 3023 for positioning the sampling bottle 4. The bottle protective cover 3021 is a cylindrical cavity structure with a connection port 30211 adapted to the needle valve adapter 301 on its top end face. Two connecting shafts 30212 are provided on the outer peripheral wall of the lower end. The two connecting shafts 30212 are mirror-symmetrically arranged with the central axis of the bottle protective cover 3021 as the axis of symmetry. The bottle holder 3022 is a U-shaped structure. The upper end of its vertical section is provided with a connecting hole 30221 adapted to the two connecting shafts 30212. That is, the bottle holder 3022 can swing around the central axis of the connecting shafts 30212, thereby opening or closing the lower end of the accommodating space 3023 to realize the removal or placement and positioning of the sampling bottle 4.

[0037] Furthermore, a nitrogen purging unit 5 is provided on one side of the assembly connector 104. The nitrogen purging unit 5 includes a purging pipe 501. The inlet end of the purging pipe 501 is connected to a nitrogen source (not shown), and the outlet end is connected to the assembly connector 104 and communicates with the fluid channel 1041. A pressure regulating valve 502 and an on / off valve 503 are sequentially arranged on the purging pipe 501 from its inlet end to its outlet end. After sampling is completed and the ball valve is kept open, nitrogen purging is used to remove residual liquid samples from the assembly connector 104, sample bottle 202, and needle valve adapter 301, ensuring that the flow channels inside the device are clean and dry, while preventing residual samples from affecting the quality of the next sampling.

[0038] It should be noted that, in order to achieve automated sampling, a control unit (not shown), such as a PLC control system, can be set up. The PLC control system can power on and off each unit and control the coordinated operation between the units to achieve multiple sampling at one time or multiple sampling at timed intervals. This is a conventional technical means in this field and will not be described in detail in this embodiment.

[0039] In summary, the online continuous sampling device provided by this utility model sets up a sample quantification unit between the sampling valve and the sampling unit, uses a flow meter to accurately measure the amount of sample entering the sample bottle, and after the sample bottle completes the quantitative sampling, the sample is transported to the sampling bottle in one go through a ball valve, realizing online time-segmented or continuous accurate quantitative and volumetric sampling. It has a simple structure, convenient and fast sampling, and is safe and reliable.

[0040] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. An on-line continuous sampling device, comprising a sampling valve (1) arranged on a main pipeline of liquid, the sampling valve (1) comprising a valve body (101), a sampling port (102) arranged on the valve body (101), and a rotary knob switch (103) arranged on the valve body (101) and used for opening or closing the sampling port (102), characterized in that: The sampling valve (1) is fixedly connected with a fitting joint (104) at the sampling port (102), the fitting joint (104) has a fluid channel (1041) connected with the sampling port (102), the lower end of the fitting joint (104) is provided with a sample quantification unit (2) connected with the fluid channel (1041), and a sampling unit (3) connected with the sample quantification unit (2); The sample quantification unit (2) comprises a flow meter (201), a sample bottle (202) and a ball valve (203), the flow meter (201) is arranged between the fitting joint (104) and the sample bottle (202) and is used for accurately metering the sample amount entering the sample bottle (202) from the fluid channel (1041); the ball valve (203) is arranged on the bottom liquid outlet (2021) of the sample bottle (202) and is used for opening or closing the liquid outlet (2021); The sampling unit (3) comprises a needle valve adapter (301) connected with the ball valve (203), and a bottle positioning structure (302) arranged on the needle valve adapter (301) and used for positioning a sampling bottle (4), the needle valve adapter (301) is provided with a sampling needle (3011) connected with the flow channel of the ball valve (203), and the bottle cap (401) of the sampling bottle (4) is provided with a rubber film (4011) which can be pierced by the sampling needle (3011).

2. The on-line continuous sampling device according to claim 1, characterized in that: The liquid outlet (2021) of the sample bottle (202) and the flow channel of the ball valve (203) are coaxially arranged with the fluid channel (1041), the sample bottle (202) is provided with a connecting pipe (2022) at the liquid outlet (2021), the flow channel inlet (2031) of the ball valve (203) is sealingly connected with the connecting pipe (2022), and the flow channel outlet (2032) of the ball valve (203) is sealingly connected with the needle valve adapter (301).

3. The on-line continuous sampling device of claim 2, wherein: The valve body (2033) of the ball valve (203) is provided with a handle (2034), the handle (2034) has a driving part (20341) and a connecting part (20342) connected with the valve rod (2035) of the ball valve (203); The connecting part (20342) is a quarter circular pie structure, two mutually perpendicular right angle walls of the connecting part (20342) are respectively provided with limiting pieces (20343) along the radial direction, an arc-shaped guide wall (20344) is arranged between the two limiting pieces (20343), and the driving part (20341) is connected with one of the right angle walls of the connecting part (20342); The valve body (2033) is provided with a limiting block (20331) on the side wall facing the handle (2034), the limiting block (20331) cooperates with the two limiting pieces (20343) to enable the handle (2034) to rotate at 0°-90°.

4. The on-line continuous sampling device of claim 3, wherein: The needle valve adapter (301) is provided with a pressure relief port (3012) on one side, and the sampling needle (3011) is provided with two, one of which communicates with the flow channel outlet (2032) of the ball valve (203), and the other communicates with the pressure relief port (3012).

5. The online continuous sampling device of claim 1, wherein: The bottle positioning structure (302) comprises a bottle protection cover (3021) and a bottle holder (3022) movably connected to the lower end of the bottle protection cover (3021), and the bottle protection cover (3021) and the bottle holder (3022) form a containing space (3023) for positioning the sampling bottle (4); The bottle protection cover (3021) is a cylindrical cavity structure, and a connecting port (30211) matched with the needle valve adapter (301) is arranged on the top end face of the bottle protection cover (3021), and two connecting shafts (30212) are arranged on the outer peripheral wall of the lower end of the bottle protection cover (3021), and the two connecting shafts (30212) are arranged in mirror image symmetry with the central axis of the bottle protection cover (3021) as the axis of symmetry. The bottle holder (3022) is a U-shaped structure, and the upper end of the vertical section of the bottle holder (3022) is provided with a connecting hole (30221) matched with the two connecting shafts (30212).

6. The online continuous sampling device of claim 1, wherein: One side of the assembly joint (104) is provided with a nitrogen purging unit (5), the nitrogen purging unit (5) comprises a purging gas pipe (501), the gas inlet end of the purging gas pipe (501) is connected with a nitrogen source, the gas outlet end is connected to the assembly joint (104) and communicates with the fluid channel (1041), and a pressure regulating valve (502) and an on-off valve (503) are sequentially arranged on the purging gas pipe (501) from the gas inlet end side to the gas outlet end side.

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