CN216669408U - O-methyl-N-nitroisourea sampling mechanism - Google Patents

Abstract

The utility model discloses an O-methyl-N-nitroisourea sampling mechanism, which comprises a liquid filter, a filter membrane and an air extractor; the liquid filter comprises an upper cover, a base, a sampling tube, a sampling port and an air suction port; the upper cover is detachably connected with the base, and when the upper cover is connected with the base, a cavity of the upper cover is communicated with a cavity of the base to form a filtrate cavity; the filter membrane is connected with the cavity of the base or the cavity of the upper cover; the sampling port is communicated with the cavity of the base or the cavity of the upper cover; the sampling tube is connected with the cavity of the base; the air extractor is communicated with the cavity of the upper cover or the cavity of the base through the air extraction opening and used for extracting the liquid to be detected into the filtrate cavity through the sampling tube. Above-mentioned technical scheme can ensure staff's safety, improves sample efficiency, avoids reation kettle to uncap the pollution that the sample led to the fact the product in to reation kettle.

Description

O-methyl-N-nitroisourea sampling mechanism

Technical Field

The utility model relates to the field of preparation of O-methyl-N-nitroisourea, in particular to an O-methyl-N-nitroisourea sampling mechanism.

Background

O-methyl-N-nitroisourea and methylamine hydrochloride react to generate O-methyl-N-nitroisourea and a small amount of byproducts (guanidine and salt) and the like by using a small amount of sodium bicarbonate as a catalyst in the presence of water as a solvent.

Under the condition that the reaction kettle is uncapped, a long-handle funnel or a suspension wire hanging centrifugal tube is manually used for extending into the reaction kettle for sampling, and then mother liquor (to-be-detected liquor) is sent to be analyzed and detected. This approach has the following disadvantages:

firstly, a reaction kettle is uncovered for sampling, and high risk threat is formed on the personal safety of operators for a reaction system with volatility, irritation, easiness in splashing, high-toxicity gas emission or large smell;

second, long handle funnel or suspension wire can't be fixed, need directly stretch into reation kettle in the appearance of getting, easily lead to the sampler to carelessly twine into the stirring rake or fall into reation kettle in, easily cause mechanical injury to operating personnel to lead to equipment emergency shutdown, influence product quality even.

SUMMERY OF THE UTILITY MODEL

Therefore, the O-methyl-N-nitroisourea sampling mechanism needs to be provided, and the problem that O-methyl-N-nitroisourea sampling is unsafe is solved.

In order to achieve the purpose, the inventor provides a device which comprises a liquid filter, a filter membrane and an air extractor;

the liquid filter comprises an upper cover, a base, a sampling tube, a sampling port and an air suction port; the upper cover is detachably connected with the base, and when the upper cover is connected with the base, a cavity of the upper cover is communicated with a cavity of the base to form a filtrate cavity; the filter membrane is connected with the cavity of the base or the cavity of the upper cover; the sampling port is communicated with the cavity of the base or the cavity of the upper cover and is positioned above the filter membrane; the sampling tube is connected with the cavity of the base; the air extractor is communicated with the cavity of the upper cover or the cavity of the base through the air extracting opening and is used for extracting the liquid to be detected into the filtrate cavity through the sampling tube.

Further, the air exhaust device is communicated with the cavity of the upper cover through the inflation port.

Further, still include pressure measurement, pressure measurement with the cavity of upper cover or the cavity of base is connected, pressure measurement is used for detecting the pressure in filtrating chamber.

Further, the pressure detection device is a pressure vacuum meter.

Further, the cavity of the base is provided with a buffer area, and the width of the buffer area is gradually increased from the base to the upper cover.

Further, the upper cover and the base are detachably connected in a threaded connection or a buckling connection mode.

Further, a sealing ring is arranged at the joint of the upper cover and the base.

Further, the novel endoscope is characterized by further comprising an endoscope, wherein the endoscope is arranged on the upper cover or the base.

Further, a flange is arranged on the sampling tube.

Furthermore, one end of the sampling tube, which is far away from the liquid filter, is provided with an internal thread or an external thread.

Different from the prior art, the technical scheme has the following advantages: firstly, the upper cover is detachably connected with the base, and filter membranes with different apertures and materials can be replaced according to the characteristics of different materials; secondly, the filter membrane can filter out solid particles in the liquid to be detected, so that the influence of the solid particles on the detection result is reduced; third, air exhaust device can take out the gas in filtrate chamber, makes the filtrate chamber be negative pressure state, and then extracts a certain amount and wait to detect during liquid takes out the filtrate chamber, can ensure staff's safety, improves sample efficiency, can also avoid reation kettle to uncap the pollution that the sample led to the fact to the product in the reation kettle simultaneously.

Drawings

FIG. 1 is a schematic cross-sectional view of a liquid filter according to an embodiment of the present invention;

FIG. 2 is a second schematic cross-sectional view of the liquid filter of the present embodiment;

FIG. 3 is a schematic cross-sectional view of the liquid filter and the air extractor in this embodiment;

FIG. 4 is a schematic cross-sectional view of the liquid filter, the air extractor, and the inflator in this embodiment;

FIG. 5 is a schematic cross-sectional view of a sampling mechanism with a view mirror according to the present embodiment;

fig. 6 is a schematic cross-sectional view of a sampling mechanism with a valve according to the present embodiment.

Description of reference numerals:

1. a liquid filter;

11. an upper cover; 12. a base; 13. a filtrate chamber; 14. a buffer region;

15. a sampling tube; 16. a sampling port; 17. an air extraction opening; 18. an inflation inlet;

2. filtering the membrane;

3. an air extraction device;

4. an inflator;

5. a pressure detection device;

6. a sight glass;

7. a valve;

8. and (4) a flange.

Detailed Description

In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.

Referring to fig. 1 to 6, the present embodiment provides a sampling mechanism of O-methyl-N-nitroisourea, which includes a liquid filter 1, a filter membrane 2 and an air pumping device 3. The liquid filter 1 comprises an upper cover 11, a base 12, a sampling tube 15, a sampling port 16 and an extraction port 17. The upper cover 11 is detachably connected with the base 12, when the upper cover 11 is connected with the base 12, the cavity of the upper cover 11 is communicated with the cavity of the base 12 to form a filtrate cavity 13, and the filtrate cavity 13 accommodates a solution to be detected, which is drawn from the reaction kettle, and the structure is shown in fig. 1. The filter membrane 2 is connected to the cavity of the base 12 or the cavity of the upper cover 11. The sampling port 16 is communicated with the cavity of the base 12 or the cavity of the upper cover 11, and the sampling port 16 is positioned above the filter membrane 2. the sampling port 16 is used as a channel for sampling the solution filtered by the filter membrane 2. The sampling tube 15 is connected with the cavity of the base 12, and the sampling tube 15 is used for connecting the liquid filter 1 and the reaction kettle. The air extractor 3 is communicated with the cavity of the upper cover 11 or the cavity of the base 12 through the air extracting opening 17, and the air extractor 3 is used for extracting the liquid to be detected into the filtrate cavity 13 through the sampling tube.

The reaction vessel is a place where the liquid to be detected (O-methyl-N-nitroisourea) is generated, and is generally placed on the ground. The filtrate cavity 13 of the liquid filter 1 can contain the liquid to be detected, the liquid filter 1 is connected with the reaction kettle through the sampling tube 15, the O-methyl-N-nitroisourea generated in the reaction kettle is pumped into the filtrate cavity 13 under the action of the air pumping device 3, the filter membrane 2 can filter out solid particles in the liquid to be detected, and the liquid to be detected rises to the sampling port 16 through the filter membrane 2.

The technical scheme has the following advantages: firstly, the upper cover is detachably connected with the base, and filter membranes with different apertures and materials can be replaced according to the characteristics of different materials; secondly, the filter membrane can filter out solid particles in the liquid to be detected, so that the influence of the solid particles on the detection result is reduced; third, air exhaust device can take out the gas in filtrate chamber, makes the filtrate chamber be negative pressure state, and then extracts a certain amount and wait to detect during liquid takes out the filtrate chamber, can ensure staff's safety, improves sample efficiency, can also avoid reation kettle to uncap the pollution that the sample led to the fact to the product in the reation kettle simultaneously.

Referring to fig. 1, in the present embodiment, the filter membrane 2 can allow the liquid to flow from one side of the filter membrane 2 to the other side of the filter membrane 2, and the filter membrane 2 can retain the solid particles in the liquid to be detected, so as to prevent the solid particles from flowing from one side of the filter membrane 2 to the other side of the filter membrane 2. The material of the filter membrane 2 can be selected from polytetrafluoroethylene, polyvinylidene chloride, water system polyethersulfone, water system mixed fiber resin, resin activated carbon, bamboo activated carbon filter material and the like.

Referring to fig. 1, in the present embodiment, the air-extracting device 3 can extract the air in the filter cavity, so that the filtrate cavity 13 is in a negative pressure state. The air extracting device 3 comprises an air extracting power source and an air extracting pipeline, and the air extracting power source is connected with the air extracting opening 17 through the air extracting pipeline. The air-extracting power source can be a vacuum air-extracting pump, an air-extracting fan, an air-extracting cylinder and the like, so that a negative pressure state is quickly formed in the filtrate cavity 13, and the liquid to be detected can flow into the filtrate cavity 13 from the reaction kettle.

The inventor finds that the redundant liquid to be detected after sampling can not be directly injected into the reaction kettle again. If the redundant liquid to be detected is directly injected into the reaction kettle, the product of the reaction kettle is easy to deteriorate; this would greatly increase the workload if the excess of the fluid to be tested was subjected to filtration/centrifugation. In order to solve the above problem, referring to fig. 3, in this embodiment, the sampling mechanism further includes an air charging device 4, an air charging port 18 is disposed on the upper cover 11, and the air charging device 3 is communicated with the cavity of the upper cover 11 or the cavity of the base 12 through the air charging port 18. Stopping air exhaust device 3 operation, letting aerating device 4 fill nitrogen gas, helium, neon, argon or krypton into filtrate chamber 13 for form the malleation in filtrate chamber 13, let wait to detect liquid and flow back to reation kettle through sampling tube 15 gradually in, can avoid waiting to detect the waste of liquid and the product in the reation kettle and take place to deteriorate.

Referring to fig. 3, preferably, the base 12 is located below the upper cover 11 and first receives the liquid to be detected, and the pumping port 17 is located at the top of the upper cover 11 to prevent the inflation device 4 from pumping out the liquid during pumping, thereby preventing the liquid to be detected from being lost.

Referring to fig. 3, preferably, the inflation port 18 is located at the top of the upper cover 11, and the liquid level can overflow to the inflation port 18 later, so as to prevent the liquid from flowing to the inflation device 4 along the inflation port 18.

Preferably, the filter membrane 2 is disposed on the base 12, and the sampling port 16, the inflation port 18 and the suction port 17 are disposed on the upper cover 11, respectively. The structure in which the upper cover 11 is separated from the base 12 is shown in fig. 2, and the structure in which the upper cover 11 is coupled to the base 12 is shown in fig. 1, 3, 4, 5, and 6.

Referring to fig. 2 and 3, in the present embodiment, in order to detect the pressure of the filtrate chamber 13, the sampling mechanism further includes a pressure detecting device 5. The pressure detection device 5 is connected with the cavity of the upper cover 11, and the pressure detection device 5 is used for detecting the pressure of the filtrate cavity 13. The pressure condition of the filtrate cavity 13 is obtained in real time by the staff through the pressure detection device 5 to detect the air exhaust state or the air inflation state. When the air extractor 3 extracts air from the liquid filter 1, the pressure detection device 5 detects that the pressure value in the filtrate cavity 13 is gradually reduced, and a worker can control the air extraction amount of the air extractor 3 in real time according to the pressure value detected by the pressure detection device 5; when the inflation device 4 is inflated into the liquid filter 1, the pressure detection device 5 detects that the pressure value in the filtrate cavity 13 gradually rises, and a worker can control the inflation amount of the inflation device 4 in real time by means of the pressure value detected by the pressure detection device 5; this avoids drawing too much solution into the liquid filter 1.

Referring to fig. 3, preferably, the pressure detecting device 5 is a pressure vacuum meter, and the pressure vacuum meter can measure both pressure and vacuum pressure, and is particularly suitable for the air extracting device 3 of the vacuum air extracting pump.

Referring to fig. 4, in the present embodiment, the cavity of the base 12 has a buffer area 14, and the buffer area 14 is located at the connection position of the cavity of the base 12 and the sampling tube 15. The width of the buffer area 14 gradually increases from the base 12 toward the cover 11. The upper cover 11 is located above the base 12, that is, the buffer area 14 is in a shape with a wide top and a narrow bottom, and as shown in fig. 4, the buffer area 14 is in a tapered shape. So can avoid solid-liquid mixture to cause the jam of pipeline and local vacuum to too big cause mechanical damage to filter membrane 2, extension sampling mechanism's life also avoids sampling mechanism to damage to staff on every side and causes the damage.

In this embodiment, the cover 11 and the base 12 are detachable to facilitate replacement of the filter membrane 2. The detachable connection of the upper cover 11 and the base 12 is a threaded connection or a snap connection. The threaded connection means that: the inner wall of the bottom of the upper cover 11 is provided with an internal thread, the outer wall of the top of the base 12 is provided with an external thread, and the upper cover 11 can be screwed with the base 12; the outer wall of the bottom of the upper cover 11 is provided with external threads, the inner wall of the top of the base 12 is provided with internal threads, and the upper cover 11 can be screwed with the base 12; the connection mode of the external thread and the internal thread has a small gap, and liquid is not easy to flow out from a gap between the upper cover 11 and the base 12. The snap connection means that: the bottom of the upper cover 11 is provided with a male buckle, and the top of the base 12 is provided with a female buckle; or the bottom of the upper cover 11 is provided with a female buckle, and the top of the base 12 is provided with a male buckle; the buckle is made of plastic with certain flexibility, the female buckle is provided with a cavity for accommodating the buckle, bayonets for clamping the buckle are respectively arranged on two sides of the cavity, the male buckle is inserted into the female buckle and can be clamped on the bayonets, the upper cover is connected with the base, and the structure is shown in figure 1; when needs are dismantled, press the buckle and make it break away from the bayonet socket, alright in order to pull out the pin thread from the box, upper cover and base phase separation, the structure is shown in fig. 2.

In a preferred embodiment, the liquid filter 1 is divided into two parts, namely an upper cover 11 and a base 12, when the upper cover 11 is connected with the base 12, a filtrate chamber 13 is formed by the cavity of the upper cover 11 and the cavity of the base 12, and in order to prevent the liquid to be detected from flowing out from the gap between the upper cover 11 and the base 12, a sealing ring is arranged at the joint of the upper cover 11 and the base 12, and the sealing ring can be made of NBR nitrile rubber, HNBR hydrogenated nitrile rubber, NR natural rubber and the like, so that the liquid filter has the advantages of good air tightness, stable performance and no medium pollution.

It should be noted that fig. 3 to 6 show the connection relationship of the liquid filter, the air extractor and the inflator, and the relationship of the sizes of the liquid filter, the air extractor and the inflator is not limited to that shown in fig. 3 to 6.

Referring to fig. 4, in this embodiment, in order to facilitate the staff to observe the liquid level condition in the liquid filter 1, the sampling mechanism further includes a viewing mirror 6, the viewing mirror 6 is disposed on the upper cover 11 or the base 12, the staff can see the liquid level condition in the liquid filter 1 through a test mirror, if the liquid level is too low, more liquid to be detected can be extracted through the air extractor 3, and if the liquid level is too high, the liquid level can be pressed down through the air charger 4, so as to regulate and control the amount of the liquid to be detected in the filtrate chamber 13, thereby avoiding sampling too much or too little.

Referring to fig. 5, in this embodiment, one end of the sampling tube 15 is communicated with the cavity of the base 12, the other end of the sampling tube 15 is communicated with the reaction kettle, a connection tube is disposed on the reaction kettle, and the other end of the sampling tube 15 is sleeved with the connection tube of the reaction kettle. Set up flange 8 on the sampling tube 15, also set up flange 8 on reation kettle's the connecting pipe, flange 8 on the sampling tube 15 with flange on the connecting pipe docks mutually, and flange joint has the advantage that connects fast, intensity is good, the leakproofness is good, realizes the totally enclosed operation of sample to realize "special use of special ware" or "a ware is multi-purpose". The flange 8 can be a welding type flat flange, and is simple to manufacture, low in cost and wide in application; the flange can be a welding neck flange, is not easy to deform in connection, has better sealing effect and can resist high temperature … …

In this embodiment, the one end that the liquid filter 1 was kept away from to sampling tube 15 sets up internal thread or external screw thread, the one end that liquid filter 1 was kept away from to sampling tube 15 with reation kettle's connecting pipe cup joints mutually. When the inner wall of one end of the sampling tube 15, which is far away from the liquid filter 1, is provided with an internal thread, the outer wall of the connecting tube of the reaction kettle is provided with an external thread, and the sampling tube 15 can be screwed with the connecting tube; when the outer wall of one end of the sampling tube 15 far away from the liquid filter 1 is provided with an external thread, the inner wall of the connecting tube of the reaction kettle is provided with an internal thread, and the sampling tube 15 can be screwed with the connecting tube.

Referring to fig. 6, in this embodiment, a valve 7 is disposed on the inflation port 18 and/or the suction port 17 and/or the sampling port 16 to control the connection or disconnection of the inflation port 18 and/or the suction port 17 and/or the sampling port 16, and the valve 7 may be a ball valve, a butterfly valve, a stop valve, or the like.

In this embodiment, the gas filling port 18 is a port on the filter 1, and may be a port of a pipe on the filter 1; and/or the suction opening 17 is a port on the liquid filter 1, and can be a port of a pipe on the liquid filter 1; and/or, the sampling port 16 is a port on the liquid filter 1, and can be a port of a tube on the liquid filter 1.

The use of the sampling mechanism is described herein:

1. the sampling tube of the sampling mechanism is sleeved with the connecting tube of the reaction kettle, and the flange can be used for reinforcing to ensure the air tightness.

2. The liquid in the reaction kettle is pumped into the filtrate cavity through the air pumping device, if the liquid level is too high, the air charging device can lower the liquid level, the filter membrane can filter out solid particles which are not dissolved in the solution, such as O-methyl-N-nitroisourea, so that the influence of the solid particles on a sampling result is avoided, and then the liquid is drained into the sampling bottle through the sampling port.

3. And (3) sampling and analyzing the solution in the sampling bottle, for example, detecting that the gas phase purity of the O-methyl-N-nitroisourea in the water phase is less than or equal to 5 percent, indicating that the reaction is finished and the O-methyl-N-nitroisourea meets the production standard.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.

In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".

In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.

As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and expressions relating to "plurality" similar thereto are also to be understood, such as "plurality", etc., unless explicitly defined otherwise.

In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application are to be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains in accordance with specific situations.

It should be noted that, although the above embodiments have been described herein, the utility model is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.

Claims (10)

1. An O-methyl-N-nitroisourea sampling mechanism is characterized by comprising a liquid filter, a filter membrane and an air extractor;

the liquid filter comprises an upper cover, a base, a sampling tube, a sampling port and an air suction port; the upper cover is detachably connected with the base, and when the upper cover is connected with the base, a cavity of the upper cover is communicated with a cavity of the base to form a filtrate cavity; the filter membrane is connected with the cavity of the base or the cavity of the upper cover; the sampling port is communicated with the cavity of the base or the cavity of the upper cover and is positioned above the filter membrane; the sampling tube is connected with the cavity of the base; the air extractor is communicated with the cavity of the upper cover or the cavity of the base through the air extracting opening and is used for extracting the liquid to be detected into the filtrate cavity through the sampling tube.

2. The O-methyl-N-nitroisourea sampling mechanism of claim 1, further comprising an inflation device, wherein an inflation port is disposed on the upper cover, and the air-pumping device is communicated with the cavity of the upper cover through the inflation port.

3. The O-methyl-N-nitroisourea sampling mechanism of claim 1 or 2, further comprising a pressure detection device connected to the cavity of the upper cover or the cavity of the base, the pressure detection device being configured to detect a pressure in the filtrate chamber.

4. The O-methyl-N-nitroisourea sampling mechanism of claim 3, wherein the pressure detection device is a pressure vacuum gauge.

5. The O-methyl-N-nitroisourea sampling mechanism of claim 1 wherein the cavity of the base has a buffer region, the width of the buffer region gradually increasing from the base toward the upper cover.

6. The O-methyl-N-nitroisourea sampling mechanism of claim 1 wherein the detachable connection of the cap to the base is a threaded connection or a snap-fit connection.

7. The O-methyl-N-nitroisourea sampling mechanism of claim 1 or 6 wherein a seal ring is provided at the junction of the upper cap and the base.

8. The O-methyl-N-nitroisourea sampling mechanism of claim 1, further comprising a sight glass disposed on the lid or the base.

9. The O-methyl-N-nitroisourea sampling mechanism of claim 1 wherein the sampling tube is flanged.

10. The O-methyl-N-nitroisourea sampling mechanism of claim 1 wherein the end of the sampling tube distal from the liquid filter is internally or externally threaded.

Images