Automatic sampling vehicle for dinitrogen tetroxide

Abstract

The invention discloses an automatic sampling vehicle for dinitrogen tetroxide, which belongs to the technical field of sampling equipment and comprises a movable chassis, a totally-enclosed sampling cabin, a rotary sampling device and a waste gas treatment module, and the rotary sampling device comprises a driving motor; the main shaft is driven by the driving motor to rotate; the mounting frame is fixed on the outer side of the main shaft; the plurality of sampling steel cylinders are circumferentially and uniformly distributed on the periphery of the mounting frame; the sealing butt joint ring is fixed at the top of the mounting frame and is provided with a plurality of groups of liquid inlet interfaces and exhaust interfaces which are communicated with the sampling steel cylinders; the fixing ring is fixed in the fully-closed sampling cabin, is in sealing running fit with the sealing butt joint ring, and is provided with a sampling pipe and a waste gas output pipe; in the sampling process of the sampling vehicle, a sample flows in the closed pipeline and the steel cylinder all the time, an operator completes sampling operation through an external control terminal and does not need to make direct contact with dinitrogen tetroxide or dinitrogen tetroxide steam, and the probability that the operator is exposed to toxic substances is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sampling equipment, and particularly relates to a dinitrogen tetroxide automatic sampling vehicle. BACKGROUND

[0002] Dinitrogen tetroxide is a strong oxidizing inorganic compound, which is a red-brown gas at room temperature and is easy to gasify. In chemical synthesis, it can be used as an oxidizing agent to participate in organic reactions, and it can also be used in the preparation of specific functional materials in the field of material processing. During storage, transportation and use, its quality needs to be detected and analyzed regularly to ensure the reliability and safety of the propulsion system.

[0003] At present, the sampling of dinitrogen tetroxide mainly relies on manual operation. The specific process is as follows: the operator introduces the liquid sample into an open tube through a valve, and then transfers the sample to a narrow-mouthed sampling bottle through the tube. In this process, the sample is in an open state. This open sampling method has significant technical defects: poor safety, the operator is directly exposed to the hazards of dinitrogen tetroxide and its decomposition products, which manifests as follows: during the sampling process, dinitrogen tetroxide is easy to cause the operator's skin to come into contact with or inhale toxic vapors due to liquid splashing, valve operation errors or pipeline leakage, etc., causing health problems such as chemical burns and respiratory damage; at the same time, the leaked dinitrogen tetroxide will quickly decompose into red-brown nitrogen dioxide gas, causing environmental pollution and corrosion of the equipment.

[0004] Therefore, we propose a dinitrogen tetroxide automatic sampling vehicle to solve the above problems. SUMMARY

[0005] The purpose of the present application is to solve the problem of unavoidable liquid overflow and different degrees of leakage caused by open sampling in the prior art, and to propose a dinitrogen tetroxide automatic sampling vehicle.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: A dinitrogen tetroxide automatic sampling vehicle, comprising: a mobile chassis; a fully-closed sampling cabin arranged on the mobile chassis, wherein the side wall of the fully-closed sampling cabin is provided with a sealed cabin door; a rotary sampling device, comprising: a drive motor; a main shaft driven to rotate by the drive motor; a mounting bracket fixed to the outer side of the main shaft; a plurality of sampling cylinders circumferentially distributed on the outer periphery of the mounting bracket; a sealed butt joint ring fixed to the top of the mounting bracket and provided with a plurality of liquid inlet interfaces and exhaust interfaces in communication with each of the sampling cylinders; A fixed ring is fixed in the full-closed sampling cabin, the fixed ring is in sealing rotary connection with the sealing butt joint ring, and a sampling pipe and a waste gas output pipe are arranged. A waste gas treatment module is connected with the waste gas output pipe.

[0007] Preferably, the sampling steel bottle comprises a bottle body, a sealing butt joint sleeve is arranged on the top of the bottle body, a liquid inlet pipe and an exhaust pipe are further arranged on the bottle body, and the liquid inlet pipe and the exhaust pipe penetrate through the sealing butt joint sleeve and form a plane with the top surface of the sealing butt joint sleeve.

[0008] Preferably, a butt joint groove is arranged on the bottom surface of the sealing butt joint ring, the butt joint groove can be clamped with the sealing butt joint sleeve to form a sealing structure, and the liquid inlet pipe and the exhaust pipe are connected with a liquid inlet interface and an exhaust interface. The sampling pipe and the waste gas output pipe are located on the rotary paths of the liquid inlet interface and the exhaust interface, and when the sampling pipe and the waste gas output pipe are connected with the liquid inlet interface and the exhaust interface, the liquid inlet pipe and the exhaust pipe are connected with the sampling pipe and the waste gas output pipe respectively.

[0009] Preferably, sealing rings corresponding to the liquid inlet pipe and the exhaust pipe are arranged on the top surface of the sealing butt joint sleeve.

[0010] Preferably, a support frame and a limiting structure for fixing the sampling steel bottle are further arranged on the mounting frame, an arc-shaped support gap matched with the bottom of the sampling steel bottle is arranged on the outer circle of the support frame. The limiting structure comprises two parallel threaded rods and matched nuts, the side wall of the sampling steel bottle is provided with a positioning lug, the threaded rods pass through the positioning lug and are fixed by the nuts.

[0011] Preferably, the waste gas treatment module comprises an absorption chamber and an adsorption chamber connected in sequence, the absorption chamber is filled with hydrogen peroxide solution, the adsorption chamber is filled with activated carbon particles, and the output end of the waste gas output pipe is located below the liquid level of the absorption liquid in the absorption chamber.

[0012] In summary, the technical effects and advantages of the present application are as follows: The full-closed sampling cabin structure is adopted in the present application, the sample flows in the closed pipeline and the steel bottle during the sampling process, the operator completes the sampling operation through the external control terminal, and there is no need to directly contact the nitrogen tetroxide or its vapor, so that the probability of the operator exposed to toxic substances is reduced, and the present application is significantly superior to the traditional open sampling mode.

[0013] The mounting frame is driven by the driving motor to rotate, the automatic butt joint of different steel bottles with the sampling pipe and the waste gas output pipe is realized, the manual bottle replacement operation is avoided, and the single sampling time is shortened.

[0014] The waste gas treatment module in the application adopts a double-stage purification process of "absorption + adsorption", wherein the 2% hydrogen peroxide solution in the absorption chamber can quickly oxidize nitrogen dioxide into nitrate, and the activated carbon particles in the adsorption chamber further remove residual gas, thereby solving the environmental pollution problem caused by traditional open sampling. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the application; Figure 2 It is a schematic diagram of the appearance structure of the application; Figure 3 It is a schematic diagram of the cross-sectional structure of the application; Figure 4 It is a schematic diagram of the structure of the rotary sampling device of the application; Figure 5 It is a schematic diagram of the structure of the mounting rack of the application; Figure 6 It is a schematic diagram of the structure of the sampling steel bottle of the application; Figure 7 It is Figure 4 It is a schematic diagram of the enlarged structure of part A.

[0016] In the figure: 1, mobile chassis; 2, fully-closed sampling cabin; 3, rotary sampling device; 31, driving motor; 32, main shaft; 33, mounting rack; 331, support frame; 332, arc-shaped support notch; 333, limiting structure; 334, threaded rod; 335, nut; 34, sampling steel bottle; 341, bottle body; 342, sealing butt joint sleeve; 343, liquid inlet pipe; 344, exhaust pipe; 345, positioning lug; 35, sealing butt joint ring; 351, liquid inlet interface; 352, exhaust interface; 36, fixing ring; 361, sampling pipe; 362, waste gas output pipe; 4, waste gas treatment module; 41, absorption chamber; 42, adsorption chamber; 421, activated carbon particles. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0018] Referring to Figures 1-7 , a dinitrogen tetroxide automatic sampling vehicle includes a mobile chassis 1, a fully-closed sampling cabin 2, a rotary sampling device 3, and a waste gas treatment module 4.

[0019] The mobile chassis 1 serves as the bearing basis of the entire sampling vehicle and is made of high-strength alloy material, has good bearing capacity and corrosion resistance, and is provided below with four low-hardness solid rubber wide-tire wheels, which have the functions of steering, driving, and braking, and the minimum ground clearance of the mobile chassis 1 is set to be greater than 20 cm to adapt to complex terrains.

[0020] The fully-closed sampling cabin 2 is arranged on the mobile chassis 1, is a core safety area of the whole sampling process, is welded by stainless steel, has excellent sealing performance and corrosion resistance, and is provided with a sealed cabin door on the side wall.

[0021] The rotary sampling device 3 comprises a driving motor 31, a main shaft 32, a mounting frame 33, a sealed butt joint ring 35, a fixed ring 36 and a plurality of sampling steel cylinders 34.

[0022] The main shaft 32 is driven to rotate by the driving motor 31, the driving motor 31 is a high-performance stepping motor, has the characteristics of high precision, large torque and stable operation, is fixed on the bottom of the fully-closed sampling cabin 2 by bolts, the output shaft thereof is connected with the main shaft 32 through a shaft coupling, the main shaft 32 is made of high-strength stainless steel, is vertically arranged in the fully-closed sampling cabin 2, the upper end thereof is connected with the fixed ring 36 through a bearing, and the lower end thereof is connected with the driving motor 31, and can rotate around the axis thereof under the driving of the driving motor 31.

[0023] The mounting frame 33 is fixed to the outer side of the main shaft 32 and is tightly connected with the main shaft 32 through bolts, a plurality of work stations for mounting the sampling steel cylinders 34 are circumferentially arranged on the mounting frame 33, and the number of the sampling steel cylinders 34 is 8 in this embodiment.

[0024] Referring to Figures 3-7 The plurality of sampling steel cylinders 34 are circumferentially arranged on the outer periphery of the mounting frame 33 and are detachably mounted on the work stations around the mounting frame 33, different sampling steel cylinders 34 can be used for sampling different positions, and finally unified analysis is performed, the sampling steel cylinder 34 comprises a cylinder body 341, a sealed butt joint sleeve 342 is mounted on the top of the cylinder body 341, the sealed butt joint sleeve 342 is used for pipeline butt joint with the sealed butt joint ring 35 when the sampling steel cylinder 34 is mounted, and plays a fixing role on the sampling steel cylinder 34, a liquid inlet pipe 343 and an exhaust pipe 344 are further mounted on the cylinder body 341, the liquid inlet pipe 343 and the exhaust pipe 344 penetrate through the sealed butt joint sleeve 342 and form a plane with the top surface of the sealed butt joint sleeve 342, during sampling, the sample enters the sampling steel cylinder 34 through the liquid inlet pipe 343, and at the same time, the gas in the sampling steel cylinder 34 is discharged through the exhaust pipe 344, so that the pressure balance is maintained during the sampling process.

[0025] The liquid inlet pipe 343 and the exhaust pipe 344 are both provided with control valves, the valves are opened when the empty bottle is sampled, and are closed before the sampling steel cylinder 34 is taken out after the sampling is completed.

[0026] The sealing butt joint ring 35 is fixed on the top of the mounting frame 33, and is provided with a plurality of groups of liquid inlet interfaces 351 and exhaust interfaces 352 which are communicated with the respective sampling steel cylinders 34. The number of the liquid inlet interfaces 351 and the exhaust interfaces 352 is the same as the number of the sampling steel cylinders 34, and they are one-to-one corresponding.

[0027] With reference to Figures 3-7 The bottom surface of the sealing butt joint ring 35 is provided with a butt joint groove. The butt joint groove can be clamped with the sealing butt joint sleeve 342 to form a sealing structure, so that the liquid inlet pipe 343 and the exhaust pipe 344 are communicated with the liquid inlet interface 351 and the exhaust interface 352. Specifically, when the sampling steel cylinder 34 is installed, the sealing butt joint sleeve 342 is aligned with the butt joint groove and clamped into the butt joint groove, so that the top surface of the sealing butt joint sleeve 342 is tightly attached to the inner wall of the butt joint groove, until the liquid inlet pipe 343 and the exhaust pipe 344 are communicated with the liquid inlet interface 351 and the exhaust interface 352, and the installation is completed. In order to further improve the sealing performance, the top surface of the sealing butt joint sleeve 342 is provided with a sealing ring corresponding to the liquid inlet pipe 343 and the exhaust pipe 344. When the butt joint groove is clamped with the sealing butt joint sleeve 342, the sealing ring is compressed to form a reliable seal, so as to prevent the leakage of dinitrogen tetroxide.

[0028] The fixing ring 36 is fixed in the fully-closed sampling cabin 2, and is sealingly and rotatably connected with the sealing butt joint ring 35. The fixing ring 36 is provided with a sampling pipe 361 and a waste gas output pipe 362. The sampling pipe 361 and the waste gas output pipe 362 are respectively located on the rotating paths of the liquid inlet interface 351 and the exhaust interface 352. When the driving motor 31 drives the mounting frame 33 to rotate, so that the certain sampling steel cylinder 34 is rotated to a specific sampling position, the sampling pipe 361 and the waste gas output pipe 362 are communicated with the liquid inlet interface 351 and the exhaust interface 352, and the liquid inlet pipe 343 and the exhaust pipe 344 are respectively communicated with the sampling pipe 361 and the waste gas output pipe 362, so as to realize the sampling of dinitrogen tetroxide and the exhaust of waste gas.

[0029] With reference to Figures 3-7In order to ensure that the sampling steel cylinder 34 is fixed firmly on the mounting frame 33, the mounting frame 33 is further provided with a support frame 331 and a limiting structure 333 for fixing the sampling steel cylinder 34. The outer circle of the support frame 331 is provided with an arc-shaped support gap 332 matched with the bottom of the sampling steel cylinder 34, and the bottom of the sampling steel cylinder 34 can be placed in the arc-shaped support gap 332 to play a role of preliminary positioning and supporting. The limiting structure 333 comprises two parallel threaded rods 334 and matched nuts 335, wherein the side wall of the sampling steel cylinder 34 is provided with a positioning lug 345, the threaded rod 334 passes through the positioning lug 345 and is tightly fixed by the nut 335. By adjusting the tightness of the nut 335, it can be ensured that the sampling steel cylinder 34 is fixed firmly on the mounting frame 33 and will not be loose or displaced during rotation. The cooperation of the nut 335 and the positioning lug 345 can limit the sampling steel cylinder 34 in the circumferential direction, so that the sampling steel cylinder 34 will not be deflected, thereby ensuring the accuracy of the sealed docking position of the liquid inlet pipe 343 and the exhaust pipe 344 with the liquid inlet interface 351 and the exhaust interface 352.

[0030] The exhaust gas treatment module 4 is connected with the exhaust gas output pipe 362, which is used for treating the exhaust gas discharged from the sampling steel cylinder 34 in the sampling process to prevent the exhaust gas from being discharged into the environment to cause pollution.

[0031] Referring to Figures 1-3 The exhaust gas treatment module 4 comprises an absorption chamber 41 and an adsorption chamber 42 which are sequentially communicated. The absorption chamber 41 contains an absorption liquid of 2% hydrogen peroxide solution. The hydrogen peroxide solution has strong oxidizing property and can react with nitrogen dioxide and other substances in the exhaust gas to oxidize them into nitric acid, so as to achieve the purpose of purifying the exhaust gas. The output end of the exhaust gas output pipe 362 is located below the liquid level of the absorption liquid in the absorption chamber 41, so as to ensure that the exhaust gas can fully contact with the absorption liquid and improve the absorption efficiency.

[0032] The adsorption chamber 42 is filled with activated carbon particles 421. The activated carbon has a large specific surface area and rich pore structure, and can adsorb trace harmful substances remaining in the exhaust gas to further purify the exhaust gas. After the double treatment of the absorption chamber 41 and the adsorption chamber 42, the exhaust gas is discharged through the exhaust port, and the content of harmful substances in the exhaust gas is greatly reduced to reach the national relevant emission standard, so that the exhaust gas can be directly discharged into the environment.

[0033] The top of the fully-closed sampling cabin 2 is provided with a sampling pipe 361 storage box and a tool storage box, which are equipped with a slidable cover to facilitate the overall taking out.

[0034] The working principle of the present application is as follows: In actual use, the operator first moves the sampling vehicle to the designated position, connects the external power supply and control equipment, then connects the dinitrogen tetroxide storage tank to be sampled with the sampling pipe 361, starts the drive motor 31 through the external control terminal, the drive motor 31 drives the main shaft 32 and the mounting frame 33 to rotate, the liquid inlet pipe 343 and the exhaust pipe 344 of a certain sampling steel cylinder 34 are rotated to the position communicated with the sampling pipe 361 and the exhaust gas output pipe 362, at this time, the dinitrogen tetroxide enters the sampling steel cylinder 34 through the sampling pipe 361, and the air and exhaust gas in the steel cylinder enter the exhaust gas treatment module 4 through the exhaust pipe 344 and the exhaust gas output pipe 362 for treatment, when the sampling of one sampling steel cylinder 34 is completed, the drive motor 31 continues to drive the mounting frame 33 to rotate, the next sampling steel cylinder 34 is rotated to the sampling position, and the next sampling operation is performed, after the sampling is completed, the sealing cabin door is opened, the sampling steel cylinder 34 is taken out, and the subsequent detection and analysis work can be performed.

[0035] In summary, the dinitrogen tetroxide automatic sampling vehicle provided in the embodiment adopts a fully-closed sampling cabin structure, the operator does not need to directly contact dinitrogen tetroxide or its vapor, the probability of the operator being exposed to toxic substances is effectively reduced, and the safety of the sampling process is significantly improved. At the same time, the automatic docking of different sampling steel cylinders 34 with the sampling pipe 361 and the exhaust gas output pipe 362 is realized through the rotary sampling device 3, manual bottle changing operation is avoided, and the sampling efficiency is improved.

Claims

1. A nitrogen tetroxide automated sampling vehicle, characterized by, The utility model relates to a mobile chassis (1), rotating sampling device (3), mobile chassis (1) is provided with the all -closed sampling cabin (2) on, and the all -closed sampling cabin (2) side wall is equipped with sealed cabin door, rotating sampling device (3) includes drive motor (31), drive motor (31) is connected with the main shaft (32), and the main shaft (32) outside is fixed with mounting bracket (33), and mounting bracket (33) is uniformly distributed with mounting bracket (33) on the outer circumferential circle, and mounting bracket (33) top is fixed with sealed butt joint ring (35), and sealed butt joint ring (35) is equipped with multiple groups with each sampling steel cylinder (34) intercommunication's liquid inlet interface (351) and exhaust port (352), and sealed butt joint ring (35) is sealed with the fixed ring (36) fixedly arranged in the all -closed sampling cabin (2) rotation cooperation, and fixed ring (36) is equipped with sampling pipe (361) and waste gas output pipe (362), and waste gas output pipe (362) is connected with waste gas treatment module (4).

2. A nitrous oxide auto-sampler cart according to claim 1, wherein, The sampling steel cylinder (34) includes a bottle body (341), a sealing adapter sleeve (342) is installed on the top of the bottle body (341), a liquid inlet pipe (343) and an exhaust pipe (344) are also installed on the bottle body (341), and the liquid inlet pipe (343) and the exhaust pipe (344) penetrate through the sealing adapter sleeve (342) to form a plane with the top surface of the sealing adapter sleeve (342).

3. A Dinitrogen Tetroxide Automated Sampling Vehicle as defined in claim 2, wherein, The bottom surface of the sealing adapter sleeve (342) is provided with an adapter groove, which can be clamped with the sealing adapter sleeve (342) to form a sealing structure, so that the liquid inlet pipe (343) and the exhaust pipe (344) are in communication with the liquid inlet interface (351) and the exhaust interface (352). The sampling pipe (361) and the waste gas output pipe (362) are located on the rotation path of the liquid inlet interface (351) and the exhaust interface (352), respectively, when the sampling pipe (361) and the waste gas output pipe (362) are in communication with the liquid inlet interface (351) and the exhaust interface (352), the liquid inlet pipe (343) and the exhaust pipe (344) are in communication with the sampling pipe (361) and the waste gas output pipe (362), respectively.

4. The nitrous oxide auto-sampler cart of claim 2, wherein, The top surface of the sealing adapter sleeve (342) is provided with a sealing ring corresponding to the liquid inlet pipe (343) and the exhaust pipe (344).

5. The nitrous oxide auto-sampler cart of claim 1, wherein, The mounting bracket (33) is also provided with a support frame (331) and a limiting structure (333) for fixing the sampling steel cylinder (34), and an arc-shaped support gap (332) matching the bottom of the sampling steel cylinder (34) is formed on the outer circle of the support frame (331). The limiting structure (333) includes two parallel threaded rods (334) and matching nuts (335), wherein the side wall of the sampling steel cylinder (34) is provided with a positioning ear (345), and the threaded rod (334) penetrates through the positioning ear (345) and is tightly fixed by the nut (335).

6. The nitrous oxide auto-sampler cart of claim 1, wherein, The waste gas treatment module (4) includes an absorption chamber (41) and an adsorption chamber (42) in sequence, the absorption chamber (41) contains 2% hydrogen peroxide solution, the adsorption chamber (42) is filled with activated carbon particles (421), and the output end of the waste gas output pipe (362) is located below the liquid level of the absorption liquid in the absorption chamber (41).

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