CN211401800U - Negative pressure type sampling device - Google Patents
Negative pressure type sampling device Download PDFInfo
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- CN211401800U CN211401800U CN201921748581.1U CN201921748581U CN211401800U CN 211401800 U CN211401800 U CN 211401800U CN 201921748581 U CN201921748581 U CN 201921748581U CN 211401800 U CN211401800 U CN 211401800U
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Abstract
The utility model provides a negative pressure type sampling device, which comprises a negative pressure cavity, a connecting component, a sampling tube and a negative pressure generating component; one end of the sampling tube is connected with the side wall of the negative pressure cavity, and the other end of the sampling tube is used for sucking a sample; one end of the connecting part is connected with a liquid outlet at the bottom of the negative pressure cavity, and the other end of the connecting part is used for connecting a sampling bottle; the negative pressure generating component is connected with an exhaust port at the top of the negative pressure cavity. The utility model provides a negative pressure formula simple structure can make things convenient for, swiftly take a sample to the reaction material in the ordinary pressure reation kettle, can guarantee sample operating personnel's safety, reduce the environmental pollution that organic steam caused.
Description
Technical Field
The utility model belongs to the technical field of fine chemical industry, a sampling device is related to, especially, relate to a negative pressure formula sampling device.
Background
In the fine chemical industry, the organic synthesis reaction in a reaction kettle needs to be monitored in real time in the production process, so that the product in the organic reaction process needs to be sampled and analyzed. The current common sampling method is to use a raw material belt to twine a sampling bottle, open a manhole cover or a sight glass, hang the sampling bottle into a reaction kettle for sampling, then hang the sampling bottle out, and finish sampling.
However, the sampling method is extensive in operation, a large amount of organic solvent exists in the reaction kettle, the reaction process is generally high temperature, and organic steam is easy to overflow after a manhole cover or a sight glass is opened, so that air pollution is caused and the body of an operator is injured. And the open type sampling mode has potential safety hazard, and the safety risk of flash explosion exists after the dissipated organic gas reaches a certain concentration. Finally, the open sampling mode risks introducing foreign matter into the reaction system, resulting in a reduction in product quality.
Therefore, the device capable of sampling in the closed reaction kettle is provided, and has important significance for guaranteeing personal safety of field operators, reducing air pollution and guaranteeing quality of synthetic products.
CN 203587388U discloses a vacuum sampler, which comprises a siphon tube penetrating through the wall of a reaction kettle and extending into the bottom of the inner cavity of the kettle, wherein the top of the siphon tube is sequentially communicated with a sampling tube and a vacuum generator from bottom to top; the vacuum generator is a venturi tube vacuum generator, and an outlet of the vacuum generator is communicated with the inner cavity of the reaction kettle through a return pipe. This vacuum sampler's structure is unfavorable for quick sample, and is not suitable for different reation kettle, still has the abluent problem of being not convenient for after the use.
CN 206683989U discloses a negative pressure reaction unit sampler, including connecting pipe, display tube and sampling tube, connecting pipe one end be connected with the vacuum tube, the other end passes through flange and is connected with the one end of display tube, the vacuum tube be connected with negative pressure device. The connecting pipe is provided with a feeding valve, the pipe wall of the connecting pipe between the material taking valve and the connecting flange is provided with a pressure relief pipe, the pressure relief pipe is provided with a pressure relief valve, the other end of the display pipe is connected with the sampling pipe through the connecting flange, and the sampling pipe is provided with a material discharging valve. The device can determine the material state in the negative pressure reaction device, but is limited to the structure, the position where the device is installed is inconvenient to operate, certain safety risk exists, and the device cannot be flexibly applied to a plurality of different reaction kettles.
CN 201548430U discloses a vacuum sampler, including vacuum generating device, by sampling bottle, tee bend, valve and pipe constitution, tee bend mill mouthful joint and the toper mill mouthful sealing connection of sampling bottle, tee bend pipe interface end and pipe rear end excircle sealing connection, the liquid outlet of pipe rear end is established in the mill mouthful joint, tee bend valve interface end and the one end sealing connection of valve, the other end of valve and vacuum generating device are sealed together, the anterior segment and the sample connection of pipe are sealed to be communicated. The device can be applicable to different reation kettle, can set up the sample connection at the sampling point in advance, nevertheless has the risk that the liquid that awaits measuring flows into evacuating device in, is unfavorable for the safety of production, stably goes on.
Therefore, the utility model provides a safe and simple structure can carry out the negative pressure formula sampling device of taking a sample fast conveniently, to guaranteeing personnel's safety, reduces organic steam's environmental pollution, has important meaning.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a negative pressure formula sampling device especially provides a negative pressure formula sampling device who is used for the ordinary pressure reation kettle to take a sample, negative pressure formula sampling device's simple structure can make things convenient for, swiftly take a sample to the reaction material in the ordinary pressure reation kettle, can guarantee sample operating personnel's safety, reduce the environmental pollution that organic steam caused.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a negative pressure formula sampling device, negative pressure formula sampling device includes negative pressure chamber, adapting unit, sampling tube and negative pressure production part.
One end of the sampling tube is connected with the side wall of the negative pressure cavity, and the other end of the sampling tube is used for sucking samples.
One end of the connecting part is connected with a liquid outlet at the bottom of the negative pressure cavity, and the other end of the connecting part is used for connecting a sampling bottle.
The negative pressure generating component is connected with an exhaust port at the top of the negative pressure cavity.
Use the utility model provides a when negative pressure formula sampling device takes a sample, the negative pressure produces the part and makes the negative pressure intracavity present the negative pressure to absorb the material in the ordinary pressure reation kettle to the negative pressure chamber through the sampling tube, then shift to in the sampling bottle of being connected with adapting unit. The negative pressure generating device is arranged at the top of the negative pressure cavity, so that the situation that reaction materials are sucked into the negative pressure generating component can not occur; the bottom of the negative pressure cavity is connected with the sampling bottle through a connecting part, so that the sampling bottle can be quickly replaced, and the sampling can be carried out for multiple times.
Preferably, the shape of the negative pressure chamber comprises a regular shape and/or an irregular shape.
Preferably, the negative pressure chamber comprises a cylindrical negative pressure chamber and/or a rectangular parallelepiped negative pressure chamber.
The length, width and height of the negative pressure cavity of the utility model can be reasonably selected according to the actual sampling situation on site, illustratively, the inner diameter of the cylindrical negative pressure cavity of the negative pressure cavity is 20-50mm, such as 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50 mm; the length is 40-100mm, and may be, for example, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm or 100 mm.
Preferably, the wall thickness of the negative pressure chamber is 2-3mm, for example, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, but not limited to the values listed, and values not listed in this range are equally applicable.
The negative pressure chamber needs to have the intensity enough to bear the negative pressure, but the too thick wall thickness can cause the weight of the negative pressure chamber to be larger, and the visibility reduces, therefore, the utility model discloses select the wall thickness in negative pressure chamber for use to be 2-3 mm.
Further, in order to make the negative pressure chamber have certain intensity, and make the negative pressure chamber can tolerate organic solution, the material in negative pressure chamber includes PE and/or PTFE.
Preferably, the length to diameter ratio of the sampling tube is (100- & ltSUB & gt 1000- & ltSUB & gt) 1, and can be, for example, 100:1, 200:1, 300:1, 400:1, 500:1, 600:1, 700:1, 800:1, 900:1, or 1000:1, but is not limited to the recited values, and values not recited in this range are equally applicable. The smaller length-diameter ratio is not beneficial to absorbing reaction materials from the reaction kettle. In order to suck the reaction materials in the conventional reaction kettle into the negative pressure cavity under the condition of using the negative pressure generating part, the length-diameter ratio of the sampling tube is selected to be (100) and 1000) to 1.
For conventional reaction vessels, the internal diameter of the sampling tube is preferably from 2 to 5mm, and may be, for example, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, but is not limited to the values recited, and values not recited in this range are equally applicable; the length is 500-2000mm, for example, 500mm, 600mm, 700mm, 800mm, 900mm, 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 1900mm or 2000mm, but is not limited to the values listed, and values not listed in this range are also applicable.
Preferably, the sampling tube is bent downward inside the negative pressure chamber, and the length of the bent portion is 10 to 20mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, but not limited to the values listed, and values not listed in the range of values are also applicable.
The utility model discloses buckle negative pressure intracavity's sampling tube downwards, when the reaction material of negative pressure intracavity was high to the sampling tube export, the reaction material of negative pressure intracavity can prevent more reaction materials to flow into the negative pressure chamber through hydraulic effect. Thereby minimizing the effect of external sampling on the reaction conditions.
Preferably, the sampling tube is bent downwards vertically in the negative pressure cavity, namely the bending angle is 90 degrees, and the length of the vertical downward bending is 10-20 mm.
The material in the reation kettle flows into the negative pressure chamber under the effect of negative pressure in the negative pressure chamber, because the draw ratio of sampling tube is higher, the reaction mass who flows into the negative pressure chamber has higher velocity of flow, if the sampling tube horizontal layout, then the reaction mass sprays in the inner wall in negative pressure chamber, and the material that splashes is easily inhaled negative pressure and is produced the part. The utility model discloses a make the sampling tube buckle downwards in the negative pressure intracavity, make the velocity of flow sampling bottle that reaction material can be faster, and the sampling process is safer.
Preferably, in order to make the sampling tube resistant to organic solutions, the material of the sampling tube of the present invention comprises PE and/or PTFE.
The sampling tube is connected with the lateral wall in negative pressure chamber, indicates sampling tube and negative pressure chamber sealing connection, sealing connection's mode is including but not limited to using rubber packing to connect, and rubber packing's setting can prevent that the negative pressure from revealing, guarantees going on smoothly of absorbing reaction material.
The other end of sampling tube is used for absorbing the sample, preferably, the sampling tube other end inserts in reation kettle perpendicularly below reaction material's the liquid level, and whole sampling tube presents "the shape of falling", and one end sets up in the negative pressure intracavity, and one end sets up in reation kettle.
The utility model discloses do not set up the mode that sets up in reation kettle to the sampling tube and do further injectd, suitable connected mode can be selected according to sealed needs to the technical staff in the field.
Preferably, the connecting part is a rubber sleeve, one end of the rubber sleeve is sleeved on a liquid outlet at the bottom of the negative pressure cavity, and the other end of the rubber sleeve is used for connecting a sampling bottle.
The rubber sleeve is elastic, can be conveniently sleeved on a liquid outlet at the bottom of the negative pressure cavity, and is convenient to replace so as to reduce the influence of samples taken by the upper wheel during sampling at each time. And use rubber sleeve to connect the sample bottle, can reach the sample bottle and get the effect of putting fast, convenient operation is swift.
Preferably, the negative pressure generating part includes a negative pressure gun and a connection pipe connected to the exhaust port.
Negative pressure rifle carries out the negative pressure production device that extracts for manual work, and operating personnel can carry out manual operation to the negative pressure rifle according to the site conditions to guarantee site operation's security.
Preferably, a tee joint is arranged on the connecting pipeline, and the other end of the tee joint is connected with a buffer device. Preferably, the buffer device comprises a buffer bottle. The buffer device can prevent the negative pressure caused by reaction material suck-back from generating the damage of components, and can also play a role of breaking vacuum when the vacuum degree in the negative pressure cavity is higher, namely, the buffer bottle is communicated with the negative pressure cavity through the rotary tee joint to reduce the vacuum degree in the negative pressure cavity.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a negative pressure formula simple structure can make things convenient for, swiftly take a sample to the reaction material in the ordinary pressure reation kettle, can guarantee sample operating personnel's safety, reduce the environmental pollution that organic steam caused.
Drawings
Fig. 1 is a schematic structural view of a negative pressure type sampling device provided in embodiment 1;
fig. 2 is a schematic structural view of the negative pressure type sampling device provided in embodiment 2;
fig. 3 is a schematic structural view of the negative pressure type sampling apparatus provided in comparative example 1.
Wherein: 1, a negative pressure cavity; 2, a rubber sleeve; 3, sampling a tube; 4, a negative pressure gun; and 5, buffering the bottle.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides a negative pressure formula sampling device, negative pressure formula sampling device's structural schematic is shown in fig. 1, including the connecting tube that cylindrical negative pressure chamber 1, rubber sleeve 2, sampling tube 3, negative pressure rifle 4 and negative pressure rifle 4 are connected with the 1 top gas vent in negative pressure chamber.
One end of the sampling tube 3 is connected with the side wall of the negative pressure cavity 1 in a sealing way through a rubber sealing gasket, and the other end of the sampling tube 3 is vertically inserted below the liquid level of the reaction materials of the reaction kettle and used for absorbing samples.
One end of the rubber sleeve 2 is connected with a liquid outlet at the bottom of the negative pressure cavity 1, and the other end of the rubber sleeve 2 is used for connecting a sampling bottle.
The cylindrical negative pressure cavity 1 is a PTEF cylindrical negative pressure cavity 1 with the wall thickness of 2mm, and the inner diameter and the length of the cylindrical negative pressure cavity 1 are respectively 20mm and 40 mm; the sampling tube 3 is a PE sampling tube 3 with the inner diameter of 5mm and the length of 500mm, the sampling tube 3 is vertically bent downwards in the cylindrical negative pressure cavity 1, and the length of the bent part is 10 mm.
When the negative pressure type sampling device provided by the embodiment 1 is used for sampling, one end of the sampling tube 3 is vertically inserted below the liquid level of the reaction materials in the reaction kettle through a quick opening which is preset in the reaction kettle; an operator manually presses the negative pressure gun 4 to enable the negative pressure cavity 1 to be in a negative pressure state, so that reaction materials are sucked into the negative pressure cavity 1 from the reaction kettle and transferred to a sampling bottle sleeved by the rubber sleeve 2.
Example 2
The embodiment provides a negative pressure formula sampling device, negative pressure formula sampling device's structural schematic is shown in fig. 2, including the connecting tube that cylindrical negative pressure chamber 1, rubber sleeve 2, sampling tube 3, negative pressure rifle 4 and negative pressure rifle 4 are connected with the 1 top gas vent in negative pressure chamber.
One end of the sampling tube 3 is connected with the side wall of the negative pressure cavity 1 in a sealing way through a rubber sealing gasket, and the other end of the sampling tube 3 is vertically inserted below the liquid level of the reaction materials of the reaction kettle and used for absorbing samples.
One end of the rubber sleeve 2 is connected with a liquid outlet at the bottom of the negative pressure cavity 1, and the other end of the rubber sleeve 2 is used for connecting a sampling bottle.
The cylindrical negative pressure cavity 1 is a PE cylindrical negative pressure cavity 1 with the wall thickness of 3mm, and the inner diameter and the length of the cylindrical negative pressure cavity 1 are 50mm and 100mm respectively; the sampling tube 3 is a PTEF sampling tube 3 with the inner diameter of 2mm and the length of 2000mm, the sampling tube 3 is vertically bent downwards in the cylindrical negative pressure cavity 1, and the length of the bent part is 20 mm.
The connecting pipeline is provided with a tee joint, and the other end of the tee joint is connected with the buffer bottle 5.
When the negative pressure type sampling device provided by the embodiment 1 is used for sampling, one end of the sampling tube 3 is vertically inserted below the liquid level of the reaction materials in the reaction kettle through a quick opening which is preset in the reaction kettle; an operator manually presses the negative pressure gun 4 to enable the negative pressure cavity 1 to be in a negative pressure state, so that reaction materials are sucked into the negative pressure cavity 1 from the reaction kettle and transferred to a sampling bottle sleeved by the rubber sleeve 2.
When the vacuum degree in the negative pressure cavity 1 exceeds the requirement, the buffer bottle 5 can be communicated with the negative pressure cavity 1 through the conversion of the tee joint, so that the vacuum degree in the negative pressure cavity 1 is reduced, and the smooth sampling is ensured.
Comparative example 1
This comparative example provides a negative pressure type sampling apparatus, which is shown in fig. 3 in a schematic structural view and is the same as in example 1 except that a sampling tube 3 is horizontally arranged inside a cylindrical negative pressure chamber 1.
Because the reaction material that flows into negative pressure chamber 1 has higher velocity of flow, sampling tube 3 horizontal arrangement in negative pressure chamber 1, and the reaction material sprays in the inner wall in negative pressure chamber 1, and the material that splashes is easily inhaled negative pressure rifle 4, is unfavorable for the safety of sample to go on.
To sum up, the utility model provides a negative pressure formula simple structure can make things convenient for, swiftly take a sample to the reaction material in the ordinary pressure reation kettle, can guarantee sample operating personnel's safety, reduce the environmental pollution that organic steam caused.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. A negative pressure type sampling device is characterized by comprising a negative pressure cavity, a connecting part, a sampling tube and a negative pressure generating part;
one end of the sampling tube is connected with the side wall of the negative pressure cavity, and the other end of the sampling tube is used for sucking a sample;
one end of the connecting part is connected with a liquid outlet at the bottom of the negative pressure cavity, and the other end of the connecting part is used for connecting a sampling bottle;
the negative pressure generating component is connected with an exhaust port at the top of the negative pressure cavity.
2. The negative-pressure sampling device of claim 1, wherein the shape of the negative-pressure lumen comprises a regular shape and/or an irregular shape.
3. The negative pressure sampling device of claim 2, wherein the negative pressure lumen comprises a cylindrical negative pressure lumen and/or a rectangular parallelepiped negative pressure lumen.
4. The negative pressure sampling device of claim 3, wherein the negative pressure chamber has a wall thickness of 2-3 mm.
5. The negative pressure sampling device as claimed in claim 1, wherein the length/diameter ratio of the sampling tube is (100): 1000): 1.
6. The negative pressure sampling device as claimed in claim 5, wherein the sampling tube has an inner diameter of 2-5mm and a length of 500-2000 mm.
7. The negative pressure sampling device according to claim 6, wherein the sampling tube is bent downward inside the negative pressure chamber, and the length of the bent portion is 10-20 mm.
8. The negative pressure type sampling device according to claim 1, wherein the connecting part is a rubber sleeve, one end of the rubber sleeve is sleeved on the liquid outlet at the bottom of the negative pressure cavity, and the other end of the rubber sleeve is used for connecting a sampling bottle.
9. The negative pressure sampling device of claim 1, wherein the negative pressure generating member comprises a negative pressure gun and a connection pipe connected to an exhaust port.
10. The negative pressure type sampling device according to claim 9, wherein a tee joint is arranged on the connecting pipeline, and a buffer device is connected to the other end of the tee joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748581.1U CN211401800U (en) | 2019-10-17 | 2019-10-17 | Negative pressure type sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748581.1U CN211401800U (en) | 2019-10-17 | 2019-10-17 | Negative pressure type sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN211401800U true CN211401800U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921748581.1U Active CN211401800U (en) | 2019-10-17 | 2019-10-17 | Negative pressure type sampling device |
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| CN (1) | CN211401800U (en) |
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2019
- 2019-10-17 CN CN201921748581.1U patent/CN211401800U/en active Active
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