Nitrogen trichloride closed sampling equipment

Abstract

The invention discloses nitrogen trichloride closed sampling equipment, and relates to the technical field of sampling equipment.The nitrogen trichloride closed sampling equipment comprises a closed box, a cap screwing assembly used for disassembling and assembling a bottle cap on a sampling bottle is arranged in the closed box, a liquid storage cylinder is further arranged in the closed box, and the nitrogen trichloride closed sampling equipment further comprises a driving base; the driving base is arranged in the closed box in a sliding manner through a linear driving assembly, and a clamping assembly for limiting a sampling bottle is arranged on the driving base. According to the nitrogen trichloride closed sampling equipment provided by the invention, by utilizing the components, the effect of automatically carrying out closed sampling on toxic samples is achieved, the situation that the environment is influenced due to misoperation in the sampling process is avoided, and the sampling efficiency is improved by utilizing automatic sampling. And the contact of a sampler with a toxic sample is reduced, so that the situation that the safety of the sampler is influenced is avoided as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to a nitrogen trichloride closed sampling equipment. Background Art

[0002] Nitrogen trichloride is an inorganic compound. It is a yellow, oily, volatile toxic liquid with a pungent odor at room temperature and pressure. Its density is 1.651, its melting point is -40.5°C, and its boiling point is 71°C. Nitrogen trichloride is very active and can easily hydrolyze and explode. In some cases, such as when nitrogen trichloride is dissolved in a solution or generated in a liquid as a reaction by-product, the liquid sampling method can be used.

[0003] However, in the prior art, the entire sampling process requires the sampler to manually use a sampling bottle to sample the nitrogen trichloride liquid, and after the sampling is completed, the sampling bottle needs to be quickly sealed. Therefore, when the sampling bottle is sealed, it is easy to cause the nitrogen trichloride liquid to volatilize due to untimely sealing, thereby causing environmental pollution. In addition, since the sampler is in contact with the nitrogen trichloride for a long time, it will also affect the safety of the sampler. Summary of the invention

[0004] The purpose of the present invention is to provide a nitrogen trichloride closed sampling device to solve the above-mentioned shortcomings in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nitrogen trichloride closed sampling device, comprising a closed box, a capping assembly for disassembling and assembling the bottle cap on the sampling bottle is arranged inside the closed box, a liquid storage cylinder is also arranged inside the closed box, and also comprising a driving base, the driving base is slidably arranged inside the closed box through a linear driving assembly, and a clamping assembly for limiting the sampling bottle is arranged on the driving base; the driving base has a first stroke, a second stroke and a third stroke in a sliding state, the driving base slides to the bottom surface of the capping assembly in the first stroke, and the bottle cap on the bottle mouth of the sampling bottle is disassembled by the capping assembly; the driving base slides to the bottom surface of the liquid storage cylinder in the second stroke, and the bottle mouth of the sampling bottle is connected to the liquid storage cylinder through the connecting assembly; the driving base slides to the bottom surface of the capping assembly again in the third stroke, and the bottle cap is installed on the bottle mouth of the sampling bottle again by the capping assembly.

[0006] Furthermore, the linear drive assembly includes a vertical drive rail fixedly installed inside the closed box, a transverse drive rail is slidably arranged on the vertical drive rail, and the drive base is slidably arranged on the transverse drive rail.

[0007] Furthermore, the clamping assembly includes a bottom tray fixedly mounted on the driving base, a middle rotating disk rotatably arranged on the top surface of the bottom tray, a plurality of arc-shaped slide grooves are opened on the middle rotating disk, a sliding rail is slidably arranged inside each of the arc-shaped slide grooves, a slide plate is slidably arranged on the surface of each of the sliding rails, each of the slide plates is radially slidably arranged on the bottom tray, and a first limiting member is fixedly mounted on one end of the plurality of slide plates close to each other, and the sampling bottle is arranged between the plurality of the first limiting members.

[0008] Furthermore, the rotary cover assembly is fixedly mounted on a driving motor inside the sealed box, an output shaft is fixedly mounted on the output end of the driving motor, a bottom sleeve is fixedly mounted on the end face of the output shaft, an extrusion block is slidably mounted on the bottom end face of the bottom sleeve, a first spring is arranged between the extrusion block and the bottom sleeve; a plurality of connecting seats are also fixedly mounted on the bottom end face of the bottom sleeve, each of the connecting seats is provided with a plurality of clamping members, the plurality of clamping members are driven by the sliding of the extrusion block, so that the plurality of extrusion blocks can rotate relative to the connecting seat.

[0009] Furthermore, a rotating block is rotatably provided on the connecting seat, and the clamping member is fixedly mounted on the rotating block; a groove is provided on the circumferential surface of the extrusion block, and a movable rod is movably provided inside the groove, and the movable rod is fixedly mounted on the rotating block.

[0010] Furthermore, a sliding rod is fixedly mounted on the extrusion block, and the sliding rod is slidably inserted on the bottom end surface of the bottom sleeve. A locking component for limiting the sliding of the extrusion block is arranged inside the bottom sleeve.

[0011] Furthermore, the locking assembly includes a fixing plate fixedly installed in the bottom sleeve, an adjusting groove is provided on the surface of the fixing plate, a sliding rod is slidably arranged inside the adjusting groove, and the sliding rods are connected to each other by a connecting rod.

[0012] Furthermore, a liquid injection cylinder is connected to the top end of the liquid storage cylinder, and a fixing cylinder is connected to the bottom end of the liquid storage cylinder.

[0013] Further, the connecting component includes a connecting tube connected to the fixed tube, a first ball plug is slidably arranged inside the connecting tube, and a second spring is arranged between the first ball plug and the fixed tube; a docking tube is slidably arranged on the connecting tube, a third spring is arranged between the docking tube and the connecting tube, and an abutment tube is slidably inserted on the top end surface of the docking tube; the bottom end of the docking tube is connected to a sleeve that matches the mouth of the sampling bottle, a second ball plug is slidably arranged inside the docking tube, and a fourth spring is arranged between the second ball plug and the sleeve.

[0014] In the above technical solution, the present invention provides a nitrogen trichloride closed sampling device, which has the following beneficial effects: By utilizing the linear drive assembly and the clamping assembly, the drive base can fix the sampling bottle, so that the sampling bottle can be moved in the closed box driven by the drive base, thereby automatically using the sampling bottle for closed sampling.

[0015] By utilizing the screw cap assembly, when the sampling bottle is moved to an appropriate position in the closed box under the action of the driving base, the sampling bottle and the screw cap assembly can cooperate with each other to disassemble and assemble the bottle cap on the mouth of the sampling bottle, thereby not only preventing the sampling bottle from being contaminated before use, but also sealing the mouth of the sampling bottle after use, thereby avoiding the volatilization of nitrogen trichloride gas and the impact on the environment and the sampler as much as possible.

[0016] By utilizing the connecting component, after the mouth of the sampling bottle is opened, the mouth of the sampling bottle can be connected to the liquid storage cylinder by driving the driving base, thereby achieving the effect of being able to sample the nitrogen trichloride liquid in the storage cylinder.

[0017] Therefore, by utilizing the above-mentioned components, not only can the toxic samples be automatically sampled in a closed manner, thus avoiding the impact on the environment due to operational errors during the sampling process, but also the use of automatic sampling reduces the sampler's contact with the toxic samples, thereby minimizing the impact on the sampler's safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the middle box; Figure 3 The embodiment of the present invention provides Figure 2 Schematic diagram of the cross-section structure; Figure 4 The embodiment of the present invention provides Figure 3 The structural diagram at A in the middle; Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the partially disassembled structure; Figure 6 The embodiment of the present invention provides Figure 3 Schematic diagram of the local structure; Figure 7 The embodiment of the present invention provides Figure 2 A schematic diagram of the structure of the middle screw cap assembly; Figure 8 The embodiment of the present invention provides Figure 2 A schematic diagram of the structure of the liquid storage cylinder and the connecting components; Fig. 9 The embodiment of the present invention provides Figure 2 A schematic diagram of the structure of the middle clamping assembly; Fig.10 The embodiment of the present invention provides Fig. 9 Schematic diagram of the partially disassembled structure; Fig.11 The embodiment of the present invention provides Fig.10 Schematic diagram of the structure at B in the figure.

[0020] Description of reference numerals: 11. Sealed box; 12. Box door; 13. Sealing cover; 14. Liquid injection nozzle; 2. Linear drive assembly; 21. Vertical drive rail; 22. Horizontal drive rail; 23. Drive base; 3. Clamping assembly; 31. Bottom tray; 32. Top fixed plate; 33. Middle rotating plate; 34. Arc slide; 35. Sliding rail; 36. Slide plate; 37. First stopper; 38. Fixed rail; 39. Second stopper; 4. Rotary cover assembly; 401. Output shaft; 402. Bottom sleeve; 403. Sliding rod; 404. First spring; 405. Extrusion block; 406. Connecting seat; 407 , rotating block; 408, clamping part; 409, buffer part; 410, groove; 411, movable rod; 412, connecting rod; 413, fixed plate; 414, adjusting slide groove; 415, sliding rod; 51, liquid storage cylinder; 52, liquid injection cylinder; 53, fixed cylinder; 6, connecting component; 601, connecting tube; 602, first ball plug; 603, second spring; 604, fixing ring; 605, sliding ring; 606, third spring; 607, butt tube; 608, abutment cylinder; 609, sleeve; 610, second ball plug; 611, fourth spring; 612, limit rod; 7, recovery part. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] See also Figure 1-11 A nitrogen trichloride sealed sampling device provided by an embodiment of the present invention comprises a sealed box 11, wherein a capping assembly 4 for disassembling and assembling a bottle cap on a sampling bottle is arranged inside the sealed box 11, a liquid storage cylinder 51 is also arranged inside the sealed box 11, and a driving base 23 is also included. The driving base 23 is slidably arranged inside the sealed box 11 through a linear driving assembly 2, and a clamping assembly 3 for limiting the sampling bottle is arranged on the driving base 23; the driving base 23 has a first stroke, a second stroke and a third stroke in a sliding state, the driving base 23 slides to the bottom surface of the capping assembly 4 in the first stroke, and the bottle cap on the bottle mouth of the sampling bottle is disassembled through the capping assembly 4; the driving base 23 slides to the bottom surface of the liquid storage cylinder 51 in the second stroke, and the bottle mouth of the sampling bottle is connected to the liquid storage cylinder 51 through the connecting assembly 6; the driving base 23 slides to the bottom surface of the capping assembly 4 again in the third stroke, and the bottle cap is installed on the bottle mouth of the sampling bottle again through the capping assembly 4.

[0023] In the above technical scheme, by utilizing the linear drive assembly 2 and the clamping assembly 3, the driving base 23 can fix and place the sampling bottle, so that the sampling bottle can be moved in the closed box 11 driven by the driving base 23, so that the sampling bottle can be automatically used for closed sampling; by utilizing the screw cap assembly 4, when the sampling bottle is moved to an appropriate position in the closed box 11 under the action of the driving base 23, the bottle cap on the bottle mouth of the sampling bottle can be disassembled and assembled through the mutual cooperation between the sampling bottle and the screw cap assembly 4, thereby not only preventing the sampling bottle from being contaminated before use, but also cleaning the sampling bottle after use. The bottle mouth is sealed, thereby avoiding the volatilization of nitrogen trichloride gas and the impact on the environment and the sampler as much as possible; by utilizing the connecting component 6, after the bottle mouth of the sampling bottle is opened, by utilizing the driving base 23, the bottle mouth of the sampling bottle can be connected to the liquid storage cylinder 51, thereby achieving the effect of being able to sample the nitrogen trichloride liquid in the storage cylinder; therefore, by utilizing the above-mentioned components, not only the effect of automatically performing closed sampling on toxic samples is achieved, avoiding the impact on the environment due to operational errors during the sampling process, but also by utilizing automatic sampling, the contact of the sampler with the toxic sample is reduced, thereby avoiding the impact on the safety of the sampler as much as possible.

[0024] Specifically, a sealing cover 13 is rotatably provided on the top of the sealed box 11 , and a torsion piece is provided between the sealing cover 13 and the sealed box 11 .

[0025] In the above technical solution, by utilizing the sealing cover 13, after the sampling bottle is placed into the sealed box 11 through the opening on the sealed box 11, the sealing cover 13 can be covered in the opening on the sealed box 11 through the torsion spring on the sealing cover 13, thereby achieving the effect of sealing the sealed box 11.

[0026] Specifically, a box door 12 is rotatably mounted on the sealed box 11 , and a transparent glass is fixedly mounted on the box door 12 .

[0027] In the above technical solution, by utilizing the transparent glass on the box door 12, it is convenient for the sampler to monitor the internal sampling process in real time through the transparent glass.

[0028] Specifically, the linear drive assembly 2 includes a vertical drive rail 21 fixedly installed inside the closed box 11 , a transverse drive rail 22 is slidably arranged on the vertical drive rail 21 , and a drive base 23 is slidably arranged on the transverse drive rail 22 .

[0029] Furthermore, the clamping assembly 3 includes a bottom tray 31 fixedly mounted on the driving base 23, a middle rotating disk 33 is rotatably arranged on the top surface of the bottom tray 31, a plurality of arc-shaped slide grooves 34 are provided on the middle rotating disk 33, a sliding rail 35 is slidably arranged inside each arc-shaped slide groove 34, a slide plate 36 is slidably arranged on the surface of each sliding rail 35, each slide plate 36 is radially slidably arranged on the bottom tray 31, and a first limiting member 37 is fixedly mounted on one end of the plurality of slide plates 36 close to each other, and the sampling bottle is arranged between the plurality of first limiting members 37.

[0030] Furthermore, a top fixed plate 32 is fixedly installed on the top surface of the bottom tray 31, a middle rotating plate 33 is rotatably set between the bottom tray 31 and the top fixed plate 32, a plurality of fixed rails 38 are fixedly installed on the bottom surface of the top fixed plate 32, and a slide plate 36 is slidably set on the fixed rails 38.

[0031] In the above technical scheme, by utilizing the clamping assembly 3, with the help of an external driving source, the electric push rod or the motor can be enabled, as long as it can drive the middle rotating disk 33 to rotate. Since there are too many replacement schemes, they are not described in detail. After the sampling bottle is placed on the bottom tray 31, the middle rotating disk 33 is rotated, so that the first limiting members 37 on the multiple slides 36 can slide along the radial direction of the top fixed disk 32, so that the sampling bottle on the bottom tray 31 can be clamped and limited between the multiple first limiting members 37. After the sampling bottle on the bottom tray 31 is clamped and limited by the clamping assembly 3, the linear driving assembly 2 is used to enable the sampling bottle on the bottom tray 31 after clamping and limiting to slide horizontally and vertically in the closed box 11.

[0032] Specifically, a second limiting member 39 is fixedly mounted on the top of the first limiting member 37 , and an anti-slip sleeve is provided on the second limiting member 39 .

[0033] In the above technical solution, the anti-slip sleeve is used to protect the sampling bottle body, and the squeezing of the sampling bottle body due to the squeezing force of the first limiter 37 is avoided as much as possible, thereby preventing the sampling bottle body from being squeezed and then damaged.

[0034] Specifically, the rotary cover assembly 4 is fixedly mounted on a driving motor inside the sealed box 11, an output end of the driving motor is fixedly mounted with an output shaft 401, an end face of the output shaft 401 is fixedly mounted with a bottom sleeve 402, an extrusion block 405 is slidably mounted on the bottom end face of the bottom sleeve 402, a first spring 404 is arranged between the extrusion block 405 and the bottom sleeve 402; a plurality of connecting seats 406 are also fixedly mounted on the bottom end face of the bottom sleeve 402, each connecting seat 406 is provided with a plurality of clamping members 408, the plurality of clamping members 408 are driven by the sliding movement of the extrusion block 405, so that the plurality of extrusion blocks 405 can rotate relative to the connecting seat 406.

[0035] Furthermore, a rotating block 407 is rotatably provided on the connecting seat 406 , and the clamping member 408 is fixedly installed on the rotating block 407 ; a groove 410 is opened on the circumferential surface of the extrusion block 405 , and a movable rod 411 is movably provided inside the groove 410 , and the movable rod 411 is fixedly installed on the rotating block 407 .

[0036] In the above technical solution, by utilizing the screw cap assembly 4, the sampling bottle after being clamped and limited on the bottom tray 31 is moved to the position of the screw cap assembly 4 under the drive of the linear drive assembly 2, and the sampling bottle on the bottom tray 31 is moved upward, so that the bottle cap of the sampling bottle can squeeze the squeezing block 405, so that when the squeezing block 405 slides upward, the clamping members 408 on the multiple connecting seats 406 can rotate close to each other, so that the multiple clamping members 408 can clamp the bottle cap on the sampling bottle, and by utilizing the driving motor, the bottom sleeve 402 can rotate under the action of the driving motor and the output shaft 401, so that the bottle cap on the bottle mouth of the sampling bottle can be removed.

[0037] Specifically, a sliding rod 403 is fixedly mounted on the extrusion block 405 , and the sliding rod 403 is slidably inserted on the bottom end surface of the bottom sleeve 402 . A locking component for limiting the sliding of the extrusion block 405 is arranged inside the bottom sleeve 402 .

[0038] Furthermore, the locking assembly includes a fixing plate 413 fixedly mounted in the bottom sleeve 402 , an adjusting groove 414 is provided on the surface of the fixing plate 413 , a sliding rod 415 is slidingly provided inside the adjusting groove 414 , and the sliding rod 415 is connected to the sliding rod 403 via a connecting rod 412 .

[0039] In the above technical solution, by utilizing the locking assembly, during the process of the squeezing block 405 sliding upward under the squeezing of the sampling bottle, the elastic force of the first spring 404 can be overcome, so that the slide bar 415 on the connecting rod 412 can slide along the adjusting slide groove 414. Therefore, after the squeezing block 405 is squeezed and lifted to a certain position, the slide bar 415 on the connecting rod 412 is utilized to temporarily clamp the slide bar 415 at the corresponding position in the adjusting slide groove 414, thereby playing the effect of limiting the sliding of the squeezing block 405, thereby playing the effect of enabling the clamping members 408 on the multiple connecting seats 406 to clamp and limit the bottle caps removed from the bottle mouths of the sampling bottles; and when sampling the samples, Afterwards, by utilizing the linear drive assembly 2, the sampling bottle on the bottom tray 31 passes through the screw cap assembly 4 again, and by utilizing the drive motor to control the reverse rotation of the output shaft 401, the bottle cap can be rotated and installed to the bottle mouth of the sampling bottle again, and by virtue of the bottle mouth of the sampling bottle contacting the squeezing block 405 again, the sliding rod 415 on the connecting rod 412 can slide along the adjusting slide groove 414 again, and by contacting the first spring 404, the squeezing block 405 can slide downward, thereby enabling the clamping members 408 on the multiple connecting seats 406 to rotate in a direction away from each other, so that the bottle cap can be loosened from between the multiple clamping members 408, thereby achieving the effect of sealing the sampling bottle.

[0040] Specifically, a buffer member 409 is fixedly mounted on each of the plurality of clamping members 408 , and the buffer member 409 is a rubber pad.

[0041] In the above technical solution, the rubber pad is used to protect the bottle cap clamped by the clamping member 408, and the situation that the bottle cap is deformed due to excessive clamping force of the clamping member 408, thereby affecting the installation of the bottle cap, is avoided as much as possible.

[0042] Specifically, the top end of the liquid storage cylinder 51 is connected to the liquid injection cylinder 52 , and the bottom end of the liquid storage cylinder 51 is connected to the fixing cylinder 53 .

[0043] Furthermore, a liquid injection nozzle 14 is provided on the top surface of the sealed box 11 , and the liquid injection nozzle 14 is connected to the liquid injection cylinder 52 .

[0044] In the above technical solution, by utilizing the injection nozzle 14 and the injection cylinder 52 , it is possible to conveniently add samples into the liquid storage cylinder 51 .

[0045] Specifically, the connecting component 6 includes a connecting tube 601 connected to the fixed cylinder 53, a first ball plug 602 is slidably arranged inside the connecting tube 601, and a second spring 603 is arranged between the first ball plug 602 and the fixed cylinder 53; a docking tube 607 is slidably arranged on the connecting tube 601, a third spring 606 is arranged between the docking tube 607 and the connecting tube 601, and an abutment tube 608 is slidably inserted on the top end surface of the docking tube 607; the bottom end of the docking tube 607 is connected to a sleeve 609 that matches the mouth of the sampling bottle, a second ball plug 610 is slidably arranged inside the docking tube 607, and a fourth spring 611 is arranged between the second ball plug 610 and the sleeve 609.

[0046] Furthermore, a fixing ring 604 is fixedly mounted on the circumference of the connecting pipe 601 , a sliding ring 605 is fixedly mounted on the circumference of the butt-jointing pipe 607 , and both ends of the second spring 603 are fixedly mounted on the fixing ring 604 and the sliding ring 605 , respectively.

[0047] Furthermore, a limiting rod 612 is slidably inserted on the fixing ring 604 , the bottom end of the limiting rod 612 is fixedly mounted on the sliding ring 605 , and the second spring 603 is sleeved on the limiting rod 612 .

[0048] In the above technical solution, after the bottle cap on the mouth of the sampling bottle on the bottom tray 31 is removed by using the screw cap assembly 4, the mouth of the sampling bottle on the bottom tray 31 can be moved to the bottom end of the liquid storage cylinder 51 by using the linear drive assembly 2, and the sampling bottle on the bottom tray 31 is driven to move upward by the linear drive assembly 2, so that the mouth of the sampling bottle can be connected with the bottom end of the sleeve, that is, the sleeve is sleeved on the mouth of the sampling bottle, and the sampling bottle on the bottom tray 31 is continuously moved upward, so that the abutting cylinder 608 on the docking cylinder can abut the first ball plug 602 and the second ball plug 610, so that the connecting tube 601 and the docking tube 607 are connected. They are interconnected, so that the sample in the liquid storage cylinder 51 can flow along the connecting tube 601 and the docking tube 607 to the sampling bottle, thereby completing the automatic sampling of the sample; and after using the sampling bottle to sample the sample, by utilizing the downward movement of the linear drive assembly 2, the docking tube 607 can be reset downward under the elastic force of the second spring 603, so that the connecting tube 601 can be separated from the docking tube 607, and the first ball plug 602 in the separated connecting tube 601 can rebound under the elastic force of the third spring 606, so that the first ball plug 602 can seal the bottom end face of the connecting tube 601.

[0049] When using the sampling bottle on the driving chassis to automatically sample the nitrogen trichloride sample, it is impossible to completely prevent the volatilization of the nitrogen trichloride gas. Therefore, in order to avoid the nitrogen trichloride gas from flowing out of the closed box 11, the nitrogen trichloride gas needs to be processed. Specifically, a recovery part 7 is provided on the side wall of the closed box 11, and an adsorption plate is fixedly installed inside the recovery part 7, and an adsorbent is provided on the adsorption plate.

[0050] Furthermore, a spraying component is also provided inside the recovery component 7, and the spraying component is located above the adsorption plate.

[0051] In the above technical scheme, by utilizing the adsorbent on the adsorption plate, the nitrogen trichloride gas volatilized in the closed box 11 can be adsorbed, and the adsorbent can be activated carbon; and by utilizing the spray part, the spray part can spray the adsorption plate, thereby treating the nitrogen trichloride gas, and the liquid sprayed by the spray part is alkali solution, which can chemically react with nitrogen trichloride to generate harmless chlorides and nitrogen, thereby avoiding the volatilization of nitrogen trichloride gas from the closed box 11 as much as possible.

[0052] Working principle: by using the clamping assembly 3 and an external driving source, after the sampling bottle is placed on the bottom tray 31, the central rotating disk 33 is rotated, so that the first limiting members 37 on the plurality of slide plates 36 can slide along the radial direction of the top fixed disk 32, thereby enabling the sampling bottle on the bottom tray 31 to be clamped and limited between the plurality of first limiting members 37, and after the clamping assembly 3 is used to clamp and limit the sampling bottle on the bottom tray 31, the linear driving assembly 2 is used to enable the clamped and limited sampling bottle on the bottom tray 31 to slide horizontally and vertically in the closed box 11; Then, by utilizing the cap screwing assembly 4, the sampling bottle on the bottom tray 31 after being clamped and limited is moved to the position of the cap screwing assembly 4 under the drive of the linear drive assembly 2, and by moving the sampling bottle on the bottom tray 31 upward, the bottle cap of the sampling bottle can squeeze the squeezing block 405, so that when the squeezing block 405 slides upward, the clamping members 408 on the multiple connecting seats 406 can rotate close to each other, so that the multiple clamping members 408 can clamp the bottle cap on the sampling bottle, and by utilizing the driving motor, the bottom sleeve 402 can rotate under the action of the driving motor and the output shaft 401, so that the sampling bottle can be squeezed. The locking assembly allows the extrusion block 405 to slide upward under the extrusion of the sampling bottle, and the elastic force of the first spring 404 can be overcome, so that the slide bar 415 on the connecting rod 412 can slide along the adjusting slide groove 414. Therefore, after the extrusion block 405 is extruded and lifted to a certain position, the slide bar 415 on the connecting rod 412 is used to temporarily clamp the slide bar 415 at the corresponding position in the adjusting slide groove 414, thereby limiting the sliding of the extrusion block 405, thereby enabling the clamping members 408 on the multiple connecting seats 406 to clamp and limit the bottle caps removed from the bottle mouths of the sampling bottles. After the bottle cap on the mouth of the sampling bottle on the bottom tray 31 is removed by using the screw cap assembly 4, the mouth of the sampling bottle on the bottom tray 31 can be moved to the bottom end of the liquid storage cylinder 51 by using the linear drive assembly 2, and the sampling bottle on the bottom tray 31 is driven to move upward by the linear drive assembly 2, so that the mouth of the sampling bottle can be connected with the bottom end of the sleeve, that is, the sleeve is arranged on the mouth of the sampling bottle, and the sampling bottle on the bottom tray 31 is continuously moved upward, so that the abutment tube 608 on the docking tube can abut the first ball plug 602 and the second ball plug 610, so that the connecting tube 601 and the docking tube 607 are connected to each other. , so that the sample in the liquid storage cylinder 51 can flow into the sampling bottle along the connecting tube 601 and the docking tube 607, thereby completing the automatic sampling of the sample; and after the sampling bottle is used to sample the sample, the linear drive assembly 2 is moved downward, so that the docking tube 607 can be reset downward under the elastic force of the second spring 603, so that the connecting tube 601 can be separated from the docking tube 607, and the first ball plug 602 in the separated connecting tube 601 can rebound under the elastic force of the third spring 606, so that the first ball plug 602 can block the bottom end surface of the connecting tube 601; After sampling the sample, the sampling bottle on the bottom tray 31 passes through the capping assembly 4 again by using the linear drive assembly 2, and the output shaft 401 is controlled by the drive motor to reverse, so that the bottle cap can be rotated and installed on the bottle mouth of the sampling bottle again, and the bottle mouth of the sampling bottle is contacted with the squeezing block 405 again, so that the sliding rod 415 on the connecting rod 412 can slide along the adjusting slide groove 414 again, and the squeezing block 405 can slide downward by contacting the first spring 404, so that the clamping members 408 on the multiple connecting seats 406 can rotate in a direction away from each other, so that the bottle cap can be loosened from between the multiple clamping members 408, thereby achieving the effect of sealing the sampling bottle; Finally, by utilizing the linear drive assembly 2, the sampling bottle on the bottom tray 31 is moved again to the position of the opening of the sealed box 11 after being sealed by means of the screw cap assembly 4, so that the sampling bottle can be taken out of the sealed box 11 by lifting the sealing cover 13 on the sealed box 11; it is worth mentioning that in the whole process of automatic sealed sampling of the sampling bottle, the adsorbent on the adsorption plate should be utilized to achieve the effect of adsorbing the nitrogen trichloride gas volatilized in the sealed box 11, and the adsorbent can be activated carbon; and by utilizing the spray part, the spray part can spray the adsorption plate, thereby achieving the purpose of processing the nitrogen trichloride gas, and the liquid sprayed by the spray part is alkaline solution, thereby avoiding the volatilization of nitrogen trichloride gas from the sealed box 11 as much as possible. The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A nitrogen trichloride closed sampling device, comprising a closed box (11), characterized in that: The sealed box (11) is provided with a screw cap assembly (4) for disassembling and assembling the bottle cap on the sampling bottle. The sealed box (11) is also provided with a liquid storage cylinder (51) and further comprises: A driving base (23) which is slidably arranged inside the closed box (11) via a linear driving assembly (2), wherein a clamping assembly (3) for limiting the position of the sampling bottle is arranged on the driving base (23); The driving base (23) has the following travel in the sliding state: In a first stroke, the driving base (23) slides to the bottom surface of the cap screwing assembly (4), and the bottle cap on the mouth of the sampling bottle is removed by the cap screwing assembly (4); In the second stroke, the driving base (23) slides to the bottom surface of the liquid storage cylinder (51), and the mouth of the sampling bottle is connected to the liquid storage cylinder (51) through the connecting component (6); In the third stroke, the driving base (23) slides again to the bottom surface of the cap screwing assembly (4), and the bottle cap is installed on the mouth of the sampling bottle again through the cap screwing assembly (4).

2. A nitrogen trichloride closed sampling device according to claim 1, characterized in that: The linear drive assembly (2) comprises a vertical drive rail (21) fixedly mounted inside the closed box (11), a transverse drive rail (22) being slidably disposed on the vertical drive rail (21), and the drive base (23) being slidably disposed on the transverse drive rail (22).

3. A nitrogen trichloride closed sampling device according to claim 2, characterized in that: The clamping assembly (3) comprises a bottom tray (31) fixedly mounted on the driving base (23); a middle rotating disk (33) is rotatably mounted on the top surface of the bottom tray (31); a plurality of arc-shaped slide grooves (34) are provided on the middle rotating disk (33); a sliding rail (35) is slidably mounted inside each of the arc-shaped slide grooves (34); a slide plate (36) is slidably mounted on the surface of each of the sliding rails (35); each of the slide plates (36) is slidably mounted on the bottom tray (31) in a radial direction; and a first limiting member (37) is fixedly mounted on one end of each of the plurality of slide plates (36) that is close to each other, and a sampling bottle is arranged between the plurality of the first limiting members (37).

4. A nitrogen trichloride closed sampling device according to claim 1, characterized in that: The rotary cover assembly (4) is fixedly mounted on a driving motor inside the sealed box (11); an output shaft (401) is fixedly mounted on the output end of the driving motor; a bottom sleeve (402) is fixedly mounted on the end surface of the output shaft (401); an extrusion block (405) is slidably mounted on the bottom end surface of the bottom sleeve (402); and a first spring (404) is disposed between the extrusion block (405) and the bottom sleeve (402); A plurality of connecting seats (406) are fixedly mounted on the bottom end surface of the bottom sleeve (402), and a plurality of clamping members (408) are provided on each of the connecting seats (406). The plurality of clamping members (408) are driven by the sliding movement of the extrusion blocks (405) so that the plurality of extrusion blocks (405) can rotate relative to the connecting seats (406).

5. A nitrogen trichloride closed sampling device according to claim 4, characterized in that: A rotating block (407) is rotatably provided on the connecting seat (406), and the clamping member (408) is fixedly mounted on the rotating block (407); A groove (410) is provided on the circumferential surface of the extrusion block (405), a movable rod (411) is movably provided inside the groove (410), and the movable rod (411) is fixedly mounted on the rotating block (407).

6. A nitrogen trichloride closed sampling device according to claim 4, characterized in that: A sliding rod (403) is fixedly mounted on the extrusion block (405), and the sliding rod (403) is slidably inserted on the bottom end surface of the bottom sleeve (402). A locking component for limiting the sliding of the extrusion block (405) is arranged inside the bottom sleeve (402).

7. A nitrogen trichloride closed sampling device according to claim 6, characterized in that: The locking assembly comprises a fixing plate (413) fixedly mounted in the bottom sleeve (402), an adjusting slide groove (414) being provided on the surface of the fixing plate (413), a sliding rod (415) being slidably arranged inside the adjusting slide groove (414), and the sliding rod (415) being connected to the sliding rod (403) via a connecting rod (412).

8. A nitrogen trichloride closed sampling device according to claim 1, characterized in that: The top end of the liquid storage cylinder (51) is connected to a liquid injection cylinder (52), and the bottom end of the liquid storage cylinder (51) is connected to a fixing cylinder (53).

9. A nitrogen trichloride closed sampling device according to claim 8, characterized in that: The connecting assembly (6) comprises a connecting tube (601) connected to the fixed tube (53), a first ball plug (602) being slidably arranged inside the connecting tube (601), and a second spring (603) being arranged between the first ball plug (602) and the fixed tube (53); A butt joint tube (607) is slidably provided on the connecting tube (601), a third spring (606) is provided between the butt joint tube (607) and the connecting tube (601), and an abutment tube (608) is slidably inserted on the top end surface of the butt joint tube (607); The bottom end of the butt joint tube (607) is connected to a sleeve (609) matched with the mouth of the sampling bottle, and a second ball plug (610) is slidably provided inside the butt joint tube (607), and a fourth spring (611) is provided between the second ball plug (610) and the sleeve (609).

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