A mobile liquid-tight sampler

Abstract

The application discloses a mobile liquid sealing sampler, which comprises a sample tank and a sample pipe, the sample pipe is fixedly communicated with the top of the sample tank, a first sampling conversion valve is threadedly connected on the sample pipe, a first nitrogen blowing valve is communicated with the end of the first sampling conversion valve away from the sample pipe through a first guide pipe, a gas guide pipe is communicated with the end of the first nitrogen blowing valve away from the first guide pipe, a second guide pipe is fixedly communicated with the bottom of the sample tank, a second sampling conversion valve is threadedly connected on the second guide pipe, and a second nitrogen blowing valve is communicated with the end of the second sampling conversion valve away from the second guide pipe through a third guide pipe. The application can return the residual sample to the corresponding sampling point, is suitable for the place where the sampling point has a certain pressure or static pressure difference, and the sample can flow into the sample tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling equipment, in particular to a mobile liquid closed sampler. BACKGROUND

[0002] In the chemical production process, liquid raw materials or products need to be sampled and analyzed. The sampling ports of most sampling valves are exposed to the outside and have short connections of different lengths. When sampling, the dead sample in the short connection needs to be replaced. The general sampling method is to place a barrel below the sampling port, first discharge the dead sample into the barrel, and then sample. After sampling, the sample is poured into a recovery tank or directly discarded.

[0003] For example, Chinese patent CN201921532503.8 discloses a reaction container liquid closed sampler, which comprises a tank body, a sampling port is arranged at the bottom of the tank body, a lower flange is fixedly connected to the bottom of the sampling port, an air inlet is arranged at the top of the tank body, a quick-opening door is hingedly connected to the right side of the tank body through a door hinge shaft, glass sight glasses are arranged on the left side of the tank body and the right side of the quick-opening door, and the quick-opening door is movably connected to the tank body through quick-opening screws on the side away from the door hinge shaft. The utility model discloses a wind inlet is arranged at the top of the sampler, an exhaust gas treatment air inlet valve is connected to the wind inlet through an upper flange, a winding drum is arranged on the sampler, and when sampling, the sampler bottle can be placed into the reactor by shaking the handle. After sampling, the sampling port valve is closed, the remaining toxic gas is discharged through the air inlet, the quick-opening door is opened to take out the sampler bottle, and the purpose of convenient sampling is achieved. The sampler of this technical solution needs to wait for the toxic gas in the air inlet to be discharged before opening, which increases the complexity of sampling.

[0004] For example, Chinese patent CN201720662454.4 discloses a pipeline liquid closed sampler, which comprises a sampling needle, a first mounting hole is vertically arranged at the top of the sampling needle, a second mounting hole coaxial with the first mounting hole is arranged at the bottom of the sampling needle, a first needle for liquid sampling is arranged in the first mounting hole, the upper end of the first needle has a material outlet, a material inlet is arranged on the outer wall of the first needle near the lower end, a second needle is installed in the second mounting hole, the second needle is sleeved outside the first needle, the material inlet is located below the second needle, an air inlet is arranged on the outer wall of the second needle, and an exhaust gas outlet is arranged on the side of the sampling needle. The sampling needle of this technical solution also directly enters the material for sampling, which causes environmental pollution.

[0005] However, most chemical raw materials or products have the characteristics of being toxic and flammable. If the sample is directly discharged into a barrel or outside, it may cause environmental pollution. If the sample is a flammable liquid, it may easily catch fire and pose a danger. If the sample is a toxic liquid, it may easily come into contact with the human body. SUMMARY

[0006] The present application aims at solving the problem of environmental pollution caused by directly discharging the sample into the barrel or outside in the prior art, and proposes a mobile liquid closed sampler.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] A mobile liquid closed sampler, comprising a sample tank and a sample pipe, the sample pipe is fixedly communicated with the top of the sample tank, a first sampling switching valve is threadedly connected on the sample pipe, a first nitrogen blowing valve is communicated with the end of the first sampling switching valve away from the sample pipe through a first conduit, a gas guide pipe is communicated with the end of the first nitrogen blowing valve away from the first conduit, a second conduit is fixedly communicated with the bottom of the sample tank, a second sampling switching valve is threadedly connected on the second conduit, a second nitrogen blowing valve is communicated with the end of the second sampling switching valve away from the second conduit through a third conduit, the second nitrogen blowing valve and the first nitrogen blowing valve are communicated through a connecting pipe, and a nitrogen quick connector is fixedly connected on the top of the connecting pipe.

[0009] Preferably, the first nitrogen blowing valve and the second nitrogen blowing valve are both threadedly connected with a sampling connector.

[0010] Preferably, a sight glass is threadedly inserted on the sample tank.

[0011] Preferably, the sight glass is acid and alkali resistant tempered glass.

[0012] Preferably, the first sampling switching valve and the second sampling switching valve are both three-way ball valves.

[0013] Preferably, the sight glass comprises a sight glass seat connected with the sample tank, a sight glass door is hingedly connected at the front end of the sight glass seat, and a glass is arranged on the sight glass door.

[0014] Preferably, the sight glass is located at the middle and lower section of the sample tank.

[0015] Preferably, the sample tank is a cylindrical tank body.

[0016] Preferably, the first nitrogen blowing valve and the second nitrogen blowing valve both use ball valves.

[0017] The present application has the following beneficial effects:

[0018] 1. The present application is used in places with relatively strict requirements for the environment of the sampling site, and the sampling process is slightly more complex than direct discharge sampling, but the better sealing is beneficial to protect the working environment.

[0019] 2. The present application can return the remaining sample to the corresponding sampling point, which is suitable for the place with certain pressure or static pressure difference, so that the sample can flow into the sample tank.

[0020] 3. The portable sample tank can be used as a handheld part. The length of the sample tank is determined according to the sampling amount. The sight glass position is positioned according to the sampling amount. The sight glass is made of acid and alkali resistant tempered glass, and is fixed to a certain position of the sample tank by a round threaded window. The sampling converter uses a three-way ball valve combined with a nitrogen purge valve to avoid dead samples during sampling. The nitrogen purge valve uses a ball valve for quick switching. The nitrogen joint uses a quick joint matched with the on-site nitrogen pipe. The sampling joint matches the on-site sampling joint, and the sample pipe joint is suitable for laboratory operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural diagram of a mobile liquid sealed sampler is provided. In the figure: 1 sample tank, 2 sample pipe, 3 first sampling conversion valve, 4 first conduit, 5 first nitrogen purge valve, 6 second conduit, 7 second sampling conversion valve, 8 third conduit, 9 second nitrogen purge valve, 10 connecting pipe, 11 nitrogen quick joint, 12 sampling joint, 13 sight glass, 14 gas guide pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all.

[0023] REFERENCE Figure 1 A mobile liquid sealed sampler includes a sample tank 1 and a sample pipe 2. The sample tank 1 is threaded with a sight glass 13, which is acid and alkali resistant tempered glass. The sample pipe 2 is fixedly communicated with the top of the sample tank 1, and the sample pipe 2 is threaded with a first sampling conversion valve 3.

[0024] In this embodiment, the first sampling conversion valve 3 is communicated with a first nitrogen purge valve 5 through a first conduit 4 away from the sample pipe 2. The first nitrogen purge valve 5 is communicated with a gas guide pipe 14 away from the first conduit 4. The bottom of the sample tank 1 is fixedly communicated with a second conduit 6, and the second conduit 6 is threaded with a second sampling conversion valve 7.

[0025] In this embodiment, the first sampling conversion valve 3 and the second sampling conversion valve 7 are both three-way ball valves. The second sampling conversion valve 7 is communicated with a second nitrogen purge valve 9 through a third conduit 8 away from the second conduit 6. In the present application, the first sampling conversion valve 3 and the second sampling conversion valve 7 use three-way ball valves, and are combined with nitrogen purge valves to avoid dead samples during sampling. In addition, the nitrogen purge valve of the present application uses a ball valve for quick switching.

[0026] In the embodiment, the first nitrogen purging valve 5 and the second nitrogen purging valve 9 are both threadedly connected with a sampling joint 12, the second nitrogen purging valve 9 and the first nitrogen purging valve 5 are communicated through a connecting pipe 10, and the top of the connecting pipe 10 is fixedly connected with a nitrogen quick joint 11. In the application, the nitrogen joint uses a quick joint and matches with a field nitrogen pipe.

[0027] In the embodiment, the sight glass 13 comprises a sight glass seat connected with the sample tank, a sight glass door is hingedly connected at the front end of the sight glass seat, and the sight glass door is provided with a glass.

[0028] In the embodiment, the sight glass 13 is located at the middle and lower section of the sample tank 1.

[0029] In the embodiment, the sample tank 1 is a cylindrical tank body.

[0030] In the embodiment, the first nitrogen purging valve 5 and the second nitrogen purging valve 9 both use ball valves.

[0031] The application is used in places where the environment requirement of a sampling site is relatively strict, and the sampling process is slightly more complex than direct discharge sampling, but the good airtightness is beneficial to protect the working environment.

[0032] The application can return the remaining sample to the corresponding sampling point, is suitable for places where the sampling point has a certain pressure or static pressure difference, so that the sample can flow into the sample tank.

[0033] The portable sample tank can be used as a handheld part. The length of the sample tank is determined according to the sampling amount. The position of the sight glass is determined according to the sampling amount. The sight glass uses acid and alkali resistant tempered glass, and is fixed to a certain position of the sample tank by a round thread window. The sampling converter uses a three-way ball valve, which is combined with a nitrogen purging valve to avoid dead samples in the sampling process. The nitrogen purging valve uses a ball valve to facilitate quick switching. The nitrogen joint uses a quick joint and matches with a field nitrogen pipe. The sampling joint matches with a field sampling joint, and the sample pipe joint is suitable for laboratory operation.

[0034] In this embodiment, before first use, the sampler is replaced completely with nitrogen, and all valves are closed, and the sampler is in normal pressure state. Then the sampler is connected to the sampling valve at the sampling point, the sampler is vertical, and all sampler valves are closed. Then the nitrogen pipe is connected. The nitrogen valve is opened, the second sampling switching valve 7 is opened, the second nitrogen purge valve 9 is opened to the nitrogen position, the sampling valve at the sampling point is opened, and a small amount of nitrogen is used to blow the dead sample of the sampling valve into the system. Then the second nitrogen purge valve 9 is closed, and then the second sampling switching valve 7 is closed. If there is sample in the sample tank, the sample is blown into the system with nitrogen for recovery, and the gas pressure in the sample tank 1 is released. The second nitrogen purge valve 9 is opened to the sampling position, and the sample flows into the sample tank under the action of pipeline pressure (10-50 kpa) under normal pressure, and then the second nitrogen purge valve 9 is closed. The second nitrogen purge valve 9 is opened to the nitrogen position, and the liquid in the sampling pipe is blown into the system with nitrogen. The pipeline sampling valve is closed first, and then the second nitrogen purge valve 9 and the second sampling switching valve 7 are closed in turn. Finally, the nitrogen valve is closed, and the sampler is removed. The sampler is sent to the laboratory for analysis.

[0035] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A mobile liquid sealed sampler, comprising a sample tank (1) and a sample tube (2), characterized in that The sample tube (2) is fixedly connected to the top of the sample tank (1), and a first sampling conversion valve (3) is threadedly connected to the sample tube (2). The end of the first sampling conversion valve (3) away from the sample tube (2) is connected to a first nitrogen purge valve (5) through a first conduit (4). The end of the first nitrogen purge valve (5) away from the first conduit (4) is connected to an air guide pipe (14). The bottom of the sample tank (1) is fixedly connected to a second conduit (6). The second conduit (6) is threadedly connected to a second sampling conversion valve (7). The second sampling conversion valve (7) is away from the sample tube (2). One end of the second conduit (6) is connected to a second nitrogen purge valve (9) through a third conduit (8); the second nitrogen purge valve (9) and the first nitrogen purge valve (5) are connected through a connecting pipe (10); the top of the connecting pipe (10) is fixedly connected to a nitrogen quick connector (11); a sampling connector (12) is threadedly connected to the second sampling conversion valve (7); a sight glass (13) is inserted into the round thread on the sample tank (1); the sight glass (13) is made of acid and alkali resistant tempered glass; the first sampling conversion valve (3) and the second sampling conversion valve (7) are both three-way ball valves; The sight glass (13) comprises a sight glass seat connected to the sample tank, a sight glass door is hingedly connected to the front end of the sight glass seat, and the sight glass door is provided with glass; The sight glass (13) is located in the middle and lower section of the sample tank.

2. A mobile liquid sealed sampler according to claim 1, characterized in that : The sample tank is a cylindrical tank.

3. A mobile liquid sealed sampler according to claim 1, characterized in that The first nitrogen purge valve (5) and the second nitrogen purge valve (9) both use ball valves.

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