Naphtha production multi-process detection sampling system

Abstract

The invention relates to the technical field of detection and sampling, in particular to a naphtha production multi-process detection and sampling system which comprises a closed sampler, the closed sampler comprises a liquid storage tank used for temporarily storing naphtha, and a liquid suction mechanism used for stretching into different depth positions in a reaction kettle for sampling is arranged on the lower side of the closed sampler. According to the closed sampler, a liquid guide pipe in the liquid suction mechanism is matched with an opening and closing assembly, the sliding depth of the liquid guide pipe and opening and closing of a flow guide opening of a blocking cover are manually adjusted, and the closed sampler can accurately stretch into different liquid layer positions in a reaction kettle for sampling; by adopting the synergistic effect of the annular floating plate, the scraping frame and the constant-force spring in the cleaning mechanism, the annular floating plate slides up and down along with the floating of the liquid level to drive the spiral scraping plate of the scraping frame to rotationally scrape the inner wall of the liquid storage tank, high-viscosity naphtha residues are effectively removed, and cross contamination of different batches of samples is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of detection sampling, and specifically to a multi-process detection sampling system for naphtha production. Background Art

[0002] Naphtha is an important light petroleum fraction, which is widely used in the fields of chemical raw materials and fuel production. Among its physical properties, viscosity and fluidity have a significant impact on sampling and detection during the production process. The viscosity of naphtha varies greatly with temperature. At lower temperatures, it is easy to form a viscous layer, resulting in reduced fluidity; while at higher temperatures, the fluidity increases, and stratification may be uneven.

[0003] Existing closed samplers are usually used to extract naphtha samples from a reaction kettle. Its core structure includes a liquid suction unit, a liquid storage tank, and a valve pipeline unit. The opening and closing of each pipeline in the closed sampler are controlled by the valve pipeline unit, so that the liquid suction unit sucks the naphtha in the reaction kettle into the liquid storage tank, and then the connection between the liquid storage tank and the reaction kettle is cut off again through the valve pipeline unit. Then, the valve pipeline unit controls the flow of naphtha in the liquid storage tank into the sampling bottle, and finally the excess naphtha in the liquid storage tank is discharged into the reaction kettle.

[0004] However, there are still obvious deficiencies in existing closed samplers. Firstly, the liquid suction mechanism can only sample at a fixed depth position, making it difficult to cover different liquid layers in the reaction kettle, resulting in the detection results being unable to comprehensively reflect the actual distribution state of naphtha. Secondly, the liquid storage tank relies on gravity to naturally drain the naphtha sample. However, due to its viscosity and the limitations of the tank structure, some liquid is likely to remain on the inner wall, and these residues may contaminate subsequent batches of samples, causing cross-contamination problems and seriously affecting the accuracy of detection data.

[0005] Therefore, there is an urgent need for an improved sampling system that can achieve multi-depth sampling and effectively clean the liquid storage tank. Summary of the Invention

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a multi-process detection sampling system for naphtha production, including a closed sampler. The closed sampler includes a liquid storage tank for temporarily storing naphtha. A liquid suction mechanism for extending into different depth positions inside the reaction kettle for sampling is provided below the closed sampler, and a cleaning mechanism for scraping the inner wall of the liquid storage tank is provided inside the closed sampler.

[0007] The liquid suction mechanism includes a connecting pipe fixedly installed below the closed sampler. A liquid guiding pipe is slidably arranged up and down inside the connecting pipe. An opening and closing assembly for controlling the connection between the liquid guiding pipe and the reaction kettle is provided on the liquid guiding pipe. When the liquid guiding pipe is manually moved downward to a specified depth below the naphtha liquid level in the reaction kettle, the liquid guiding pipe can be connected to the reaction kettle through the opening and closing assembly.

[0008] The cleaning mechanism includes an annular floating plate slidably arranged up and down inside the liquid storage tank. A scraping frame is rotatably arranged on the outer side of the annular floating plate. Both the upper and lower parts of the scraping frame are in the structure of an annular plate. Spiral scraping plate structures are arranged at equal intervals in the middle of the scraping frame. A constant force spring is arranged between the upper side of the annular floating plate and the liquid storage tank.

[0009] Preferably, the opening and closing component includes a blocking cover slidably arranged up and down at the lower end inside the liquid guide pipe. The lower side surface of the blocking cover is in a closed structure. A plurality of diversion openings for communicating its inner and outer sides are arranged at equal intervals along the circumference at the lower end of the outer side of the blocking cover.

[0010] Preferably, a connecting rod is fixedly installed on the upper side of the blocking cover. A tension spring is arranged between the connecting rod and the liquid guide pipe. The outer side of the liquid guide pipe is rotatably connected with a rotating handle through a branch pipe. A spiral groove pulley is fixedly installed at one end of the rotating handle located inside the liquid guide pipe. The upper end of the connecting rod is slidably connected inside the groove of the spiral groove pulley.

[0011] Preferably, a resistance plate is slidably arranged back and forth inside the blocking cover. The resistance plate corresponds to one of the diversion openings. A spiral spring is arranged between the resistance plate and the blocking cover. An adjusting pipe is slidably arranged up and down inside the blocking cover. A linkage plate is hinged between the resistance plate and the adjusting pipe.

[0012] Preferably, a blocking block is slidably arranged back and forth through a support plate at the lower end of the liquid guide pipe. A linkage column is fixedly installed on the upper side of the blocking block. A guide groove plate is slidably arranged left and right on the upper side of the support plate of the liquid guide pipe. The linkage column is slidably connected on the chute of the guide groove plate.

[0013] Preferably, a cover plate is fixedly installed at the rear end of the support plate of the liquid guide pipe. A rotating box is rotatably arranged on the left side of the cover plate. A clockwork spring is arranged between the cover plate and the rotating box. A threaded rod threadedly connected with the rotating box is fixedly installed at the rear side of the guide groove plate.

[0014] Preferably, a supporting plate is fixedly installed at the lower rear end of the liquid guide pipe. A buoyancy ball is placed on the upper part of the supporting plate. The buoyancy ball is connected with the rotating box through a thin wire without elasticity and wound around the outer side of the rotating box.

[0015] Preferably, a lead screw is fixedly installed inside the liquid storage tank. A ball nut is threadedly connected to the outer side of the lead screw. The ball nut is rotatably connected with the annular floating plate. A planetary gear is fixedly installed on the ball nut. An external gear meshing with the planetary gear is fixedly installed on the scraping frame.

[0016] Preferably, a linkage ring is rotatably arranged inside the annular floating plate. A stirring row frame is slidably arranged up and down inside the linkage ring. An internal gear meshing with the planetary gear is fixedly installed on the upper side of the linkage ring.

[0017] Preferably, a support base is fixedly installed on the upper side of the annular floating plate. A toggle plate is slidably arranged along the radial direction of the liquid storage tank on the upper side of the support base. The side of the toggle plate away from the axis of the liquid storage tank is of an arc structure, and a return spring is arranged between the side of the toggle plate close to the axis of the liquid storage tank and the support base.

[0018] The beneficial effects of the present invention are as follows: First, the present invention uses the liquid guide tube in the liquid absorption mechanism to cooperate with the opening and closing assembly. By manually adjusting the sliding depth of the liquid guide tube and the opening and closing of the diversion port of the blocking cover, it can accurately extend into different liquid layer positions in the reaction kettle for sampling, solving the limitation of the traditional technology that can only sample at a fixed depth, and ensuring that the detection results comprehensively reflect the actual stratification state of naphtha.

[0019] Second, the present invention uses the synergistic effect of the annular floating plate, scraping frame and constant force spring in the cleaning mechanism. Through the up and down sliding of the annular floating plate floating with the liquid level and the elastic force of the constant force spring itself, the spiral scraper of the scraping frame is driven to rotate and scrape the inner wall of the liquid storage tank, effectively removing the residue of high-viscosity naphtha and avoiding cross-contamination of samples from different batches.

[0020] Third, the present invention uses the linkage mechanism of the buoyancy ball and the rotating box. The buoyancy ball pulls the thin line to drive the rotating box to rotate, so that the guide groove plate drives the blocking block to move back and forth. Thus, when the lower end of the liquid guide tube does not reach the specified depth below the naphtha liquid level, the blocking cover cannot be moved, and thus the naphtha cannot be sampled, ensuring the accuracy of the sampling depth and the accuracy of the detection results.

[0021] Fourth, the present invention uses the resistance plate to be able to adjust the opening size of the diversion port in real time through the adjusting tube by detecting the flow rate of naphtha, so that naphtha with different viscosities flows into the liquid storage tank at the same flow rate. By automatically adjusting the flow rate, the laminar flow state can be maintained, ensuring the independent collection of each liquid layer and preventing the mixing of stratified samples caused by too fast flow rate.

[0022] Fifth, the present invention uses the stirring and discharging frame that rotates synchronously with the scraping frame to stir and mix the naphtha inside the liquid storage tank to ensure the uniformity of the sample. And the toggle plate can be used to toggle the spiral scraper on the scraping frame, so that the spiral scraper vibrates and shakes off the naphtha on it, ensuring the scraping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the drawings and embodiments.

[0024] Figure 1 is the overall structural schematic diagram of the present invention.

[0025] Figure 2 is the partial cross-sectional view of the closed sampler, connecting pipe, liquid guide tube and opening and closing assembly in the present invention.

[0026] Figure 3It is a partial cross-sectional view of the liquid guide tube, connecting rod, rotating handle and vortex groove wheel in the present invention.

[0027] Figure 4 It is a partial cross-sectional view of the liquid guiding tube, the plugging cover, the cover plate and the guide groove plate in the present invention.

[0028] Figure 5 It is a partial cross-sectional view of the guide groove plate, cover plate, rotating box and threaded rod in the present invention.

[0029] Figure 6 It is a partial cross-sectional view of the blocking cover, linkage plate, resistance plate and regulating pipe in the present invention.

[0030] Figure 7 It is a partial cross-sectional view of the liquid storage tank and the cleaning mechanism in the present invention.

[0031] Figure 8 It is a partial cross-sectional view of the liquid storage tank, the lead screw, the ball nut and the linkage ring in the present invention.

[0032] Figure 9 It is a structural schematic diagram of the annular floating plate, the scraping frame, the linkage ring and the stirring rack in the present invention.

[0033] In the figure: 1, closed sampler; 2, liquid suction mechanism; 3, cleaning mechanism; 11, liquid storage tank; 21, connecting pipe; 22, liquid guide pipe; 23, opening and closing assembly; 24, resistance plate; 31, annular floating plate; 32, scraping frame; 33, lead screw; 34, linkage ring; 35, support seat; 221, blocking block; 222, linkage column; 223, guide groove plate; 224, cover plate; 225, rotating box; 22 6. Spring; 227. Threaded rod; 228. Support plate; 229. Buoyancy ball; 231. Blocking cover; 232. Diversion port; 233. Connecting rod; 234. Rotating handle; 235. Vortex groove wheel; 241. Adjusting tube; 242. Linkage plate; 331. Ball nut; 332. Planetary gear; 333. External gear; 341. Stirring rack; 342. Internal gear; 351. Toggle plate. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product specifications are used.

[0035] See also Figure 1 , Figure 2 and Figure 7, A multi-process detection and sampling system for naphtha production, including a closed sampler 1. The closed sampler 1 includes a liquid storage tank 11 for temporarily storing naphtha. A liquid suction mechanism 2 for extending into different depth positions inside the reaction kettle for sampling is arranged on the lower side of the closed sampler 1. A cleaning mechanism 3 for scraping the inner wall of the liquid storage tank 11 is arranged inside the closed sampler 1.

[0036] When it is necessary to sample and detect the naphtha in the reaction kettle, first operate the closed sampler 1 to make the liquid storage tank 11 communicate with the liquid suction mechanism 2. Then move the liquid suction mechanism 2 downward to extend into the naphtha at different depths in the reaction kettle. Then operate the closed sampler 1 to suck the naphtha in the reaction kettle into the liquid storage tank 11 through the liquid suction mechanism 2. At the same time, stir the naphtha in the liquid storage tank 11 through the cleaning mechanism 3.

[0037] Next, operate the closed sampler 1 to cut off the connection between the liquid storage tank 11 and the liquid suction mechanism 2, and flow the naphtha sample in the liquid storage tank 11 into the sampling bottle through the closed sampler 1. Then operate the closed sampler 1 again to make the liquid storage tank 11 communicate with the liquid suction mechanism 2, so as to discharge the remaining naphtha inside the liquid storage tank 11 into the reaction kettle. At the same time, scrape the naphtha attached to the inner wall of the liquid storage tank 11 through the cleaning mechanism 3.

[0038] After that, replace the sampling bottle and move the liquid suction mechanism 2 downward again, repeating the above steps to sample the naphtha at different positions in the reaction kettle.

[0039] Refer to Figure 1 and Figure 2 , The liquid suction mechanism 2 includes a connecting pipe 21 fixedly installed on the lower side of the closed sampler 1. A liquid guide pipe 22 is slidably arranged up and down inside the connecting pipe 21. An opening and closing assembly 23 for controlling the communication between the liquid guide pipe 22 and the reaction kettle is arranged on the liquid guide pipe 22. When manually moving the liquid guide pipe 22 downward to a specified depth below the liquid level of the naphtha in the reaction kettle, the liquid guide pipe 22 can be communicated with the reaction kettle through the opening and closing assembly 23.

[0040] Refer to Figure 2 and Figure 4 , The opening and closing assembly 23 includes a blocking cover 231 slidably arranged at the lower end inside the liquid guide pipe 22. The lower side surface of the blocking cover 231 is of a closed structure. A plurality of diversion openings 232 for communicating its inside and outside are equidistantly arranged along the circumferential direction at the lower end of the outer side of the blocking cover 231.

[0041] Refer to Figure 2 , Figure 3 and Figure 4, a connecting rod 233 is fixedly installed on the upper side of the plugging cover 231. A tension spring is arranged between the connecting rod 233 and the liquid guide pipe 22. The outer side of the liquid guide pipe 22 is rotatably connected with a rotating handle 234 through a branch pipe. One end of the rotating handle 234 located inside the liquid guide pipe 22 is fixedly installed with a spiral groove pulley 235. The upper end of the connecting rod 233 is slidably connected inside the groove opening of the spiral groove pulley 235.

[0042] It should be noted that the groove opening on the spiral groove pulley 235 is in a spiral line structure, so that when the spiral groove pulley 235 rotates, it can push the connecting rod 233 to move along the radial direction of the spiral groove pulley 235 through the groove opening on it.

[0043] In the initial state, the lower side surface of the plugging cover 231 is flush with the lower side surface of the liquid guide pipe 22, so that the liquid guide pipe 22 blocks the diversion port 232 to prevent the naphtha from flowing into the liquid guide pipe 22. The upper end of the connecting rod 233 is located at a position close to the axis of the spiral groove pulley 235 inside the groove opening of the spiral groove pulley 235.

[0044] Refer to Figure 2 , Figure 4 and Figure 5 , a blocking block 221 is slidably arranged before and after at the lower end of the liquid guide pipe 22 through a support plate. A linkage column 222 is fixedly installed on the upper side of the blocking block 221. A guide groove plate 223 is slidably arranged left and right on the upper side of the support plate of the liquid guide pipe 22. The linkage column 222 is slidably connected on the sliding groove of the guide groove plate 223.

[0045] It should be noted that the sliding groove of the guide groove plate 223 is in a continuous bending shape. In the initial state, the linkage column 222 is located at the leftmost part of the sliding groove of the guide groove plate 223, so that the sliding groove of the guide groove plate 223 drives the blocking block 221 to move and block the lower part of the plugging cover 231 by pushing the linkage column 222 forward, thereby preventing the plugging cover 231 from moving downward.

[0046] Refer to Figure 4 and Figure 5 , a cover plate 224 is fixedly installed at the rear end of the support plate of the liquid guide pipe 22. A rotating box 225 is rotatably arranged on the left side of the cover plate 224. A clockwork spring 226 is arranged between the cover plate 224 and the rotating box 225. A threaded rod 227 threadedly connected with the rotating box 225 is fixedly installed at the rear side of the guide groove plate 223.

[0047] Continue to refer to Figure 4 and Figure 5 , a supporting plate 228 is fixedly installed at the lower rear side of the liquid guide pipe 22. A buoyancy ball 229 is placed on the upper part of the supporting plate 228. The buoyancy ball 229 is connected with the rotating box 225 through a thin wire that has no elasticity and is wound around the outside of the rotating box 225.

[0048] In the initial state, the clockwork spring 226 drives the rotation of the rotating box 225 through its own elastic force, causing the rotating box 225 to pull the buoyancy ball 229 by winding the thin wire and abut against the upper part of the supporting plate 228.

[0049] When it is necessary to sample the naphtha in the reactor, the operator holds the rotating handle 234 and moves it downward. The rotating handle 234 drives the liquid guide pipe 22 to move downward through the branch pipe. When the liquid guide pipe 22 drives the buoyancy ball 229 to move to the liquid level position of the naphtha, the naphtha pushes the buoyancy ball 229 to float on the liquid surface of the naphtha through buoyancy, so that the liquid guide pipe 22 drives the rotating box 225 to move downward relative to the buoyancy ball 229, and the buoyancy ball 229 drives the rotating box 225 to rotate by pulling the thin wire.

[0050] The rotating box 225 drives the guide groove plate 223 to move leftward through the threaded rod 227. At the same time, the rotating box 225 winds the clockwork spring 226 to store energy. When the guide groove plate 223 moves leftward, it pushes the linkage column 222 backward through the chute on it. When the linkage column 222 moves to the last point of the first chute of the guide groove plate 223 from left to right, the linkage column 222 drives the blocking block 221 to completely move to the rear of the blocking cover 231, so that the blocking block 221 no longer blocks the blocking cover 231.

[0051] Then the operator manually rotates the rotating handle 234, so that the rotating handle 234 drives the spiral groove pulley 235 to rotate synchronously, so that the position of the groove opening of the spiral groove pulley 235 far from the axis of the spiral groove pulley 235 rotates to the lower part, so that the spiral groove pulley 235 pushes the connecting rod 233 downward, and the connecting rod 233 drives the blocking cover 231 to move downward, so that the liquid guide pipe 22 no longer blocks the diversion port 232.

[0052] Refer to Figure 2 、 Figure 4 and Figure 6 As shown in, a resistance plate 24 is slidably arranged inside the blocking cover 231 in the front and rear direction. The resistance plate 24 corresponds to one of the diversion ports 232. A spiral spring is arranged between the resistance plate 24 and the blocking cover 231. An adjusting pipe 241 is slidably arranged inside the blocking cover 231 in the up and down direction. A linkage plate 242 is hinged between the resistance plate 24 and the adjusting pipe 241.

[0053] When the diversion port 232 moves to the lower part of the liquid guide pipe 22, the operator controls the closed sampler 1 to evacuate the liquid storage tank 11, so that a negative pressure is formed inside the liquid storage tank 11. Subsequently, the liquid storage tank 11 sucks the naphtha in the reactor through the liquid guide pipe 22, so that the naphtha in the reactor flows into the liquid guide pipe 22 through the diversion port 232.

[0054] When naphtha flows through the diversion port 232 into the liquid guide pipe 22, the naphtha pushes the resistance plate 24 backward, causing the resistance plate 24 to pull the adjustment pipe 241 downward through the linkage plate 242. The arc-shaped wall of the adjustment pipe 241 shields all the diversion ports 232, thereby reducing the opening size of the diversion ports 232, automatically reducing the flow rate of the naphtha, maintaining a laminar flow state, ensuring independent collection of each liquid layer, and preventing the occurrence of stratified sample mixing due to excessive flow rate.

[0055] Refer to Figure 1 、 Figure 7 and Figure 9 Refer to

[0056] Refer to Figure 7 、 Figure 8 and Figure 9 Refer to

[0057] Continue to refer to Figure 7 、 Figure 8 and Figure 9 Refer to

[0058] When the naphtha flows upward along the liquid guide pipe 22 into the inside of the liquid storage tank 11, the naphtha pushes the annular floating plate 31 upward through buoyancy. The annular floating plate 31 compresses the constant force spring. At the same time, the annular floating plate 31 drives the scraping frame 32 and the linkage ring 34 to move upward synchronously. The stirring row frame 341 moves downward relative to the linkage ring 34 under the action of gravity. When the annular floating plate 31 moves upward, it drives the ball nut 331 to move upward along the lead screw 33, causing the ball nut 331 to rotate in cooperation with the lead screw 33.

[0059] The ball nut 331 drives the internal gear 342 and the external gear 333 to rotate synchronously through the planetary gear 332. The internal gear 342 drives the stirring row frame 341 to rotate through the linkage ring 34, so that the stirring row frame 341 extending downward into the naphtha inside the liquid storage tank 11 stirs the naphtha, thereby improving the uniformity of the naphtha in the liquid storage tank 11.

[0060] Then the operator turns the valve between the liquid storage tank 11 and the liquid conduit 22 to cut off the connection between the liquid storage tank 11 and the liquid conduit 22, and stops extracting the gas inside the liquid storage tank 11. Then the operator operates the valve on the lower left side of the liquid storage tank 11 to make the naphtha inside the liquid storage tank 11 flow into the sampling bottle. When the naphtha sample in the sampling bottle reaches the specified volume, the valve on the lower left side of the liquid storage tank 11 is closed, and the valve between the liquid storage tank 11 and the liquid conduit 22 is opened, so that the naphtha inside the liquid storage tank 11 is discharged into the reactor again through the liquid conduit 22 under the action of gravity.

[0061] When the naphtha in the liquid storage tank 11 decreases, the liquid level of the naphtha in the liquid storage tank 11 gradually decreases, and the annular float 31 moves downward synchronously with the liquid level of the naphtha under the dual effects of its own gravity and the elastic force of the constant force spring, so that the ball nut 331 drives the scraper frame 32 to rotate through the external gear 333, and the scraper frame 32 scrapes the naphtha attached to the inner wall of the liquid storage tank 11 through the spiral scraper structure thereon, and at the same time, the scraped naphtha can be transmitted downward through the spiral structure of its scraper, so that the attached naphtha drips and flows back into the reactor.

[0062] See also Figure 7 A support seat 35 is fixedly installed on the upper side of the annular floating plate 31, and a toggle plate 351 is provided on the upper side of the support seat 35 for radial sliding along the liquid storage tank 11. The toggle plate 351 has an arc-shaped structure on the side away from the axis of the liquid storage tank 11, and a return spring is provided between the toggle plate 351 and the support seat 35 on the side close to the axis of the liquid storage tank 11.

[0063] It should be noted that the spiral scraper structure of the scraper frame 32 is made of elastic material, such as plastic.

[0064] When the scraper frame 32 rotates, the spiral scraper on the scraper frame 32 intermittently contacts with the toggle plate 351, so that the toggle plate 351 deforms by abutting against the spiral scraper. At the same time, the spiral scraper pushes the toggle plate 351 toward the direction close to the axis of the liquid storage tank 11. When the spiral scraper passes over the toggle plate 351, the spiral scraper returns to its original shape through its own elastic force, so that the toggle plate 351 continuously toggle the spiral scraper, causing the spiral scraper to vibrate, thereby shaking off the naphtha attached to the spiral scraper.

[0065] When the naphtha is completely discharged into the reactor, the sampling bottle is replaced, and the external force on the rotating handle 234 is removed. The tension spring pulls the connecting rod 233 upward by its own elastic force, so that the connecting rod 233 drives the blocking cover 231 and the vortex groove wheel 235 to return to their initial positions, and then the liquid guide tube 22 is moved downward again, so that the rotating box 225 continues to rotate, and the guide groove plate 223 continues to move to the left, so that the blocking block 221 moves to the lower part of the blocking cover 231 again for blocking.

[0066] In this embodiment, by introducing gas into the liquid storage tank 11 to increase the pressure, the naphtha can be pushed to be completely discharged into the reaction kettle along the liquid guide pipe 22.

[0067] When the linkage column 222 moves to the second last point of the chute of the guide groove plate 223 from left to right, repeat the above steps to sample the naphtha in the reaction kettle into the sampling bottle. Then, move the liquid guide pipe 22 downward again, so that the linkage column 222 moves to the second last point of the chute of the guide groove plate 223 from left to right, and sample again. Subsequently, move the liquid guide pipe 22 upward to the initial position, so as to sample the naphtha at different depth positions in the reaction kettle.

[0068] Refer to Figures 1 to 9 , when sampling the naphtha in the reaction kettle of the present invention, the following steps are further included: First step, the operator holds the rotating handle 234 and moves downward, so that the guide groove plate 223 pushes the linkage column 222 backward to the first last point of the chute from left to right. The operator manually rotates the rotating handle 234 and turns the valve to connect the liquid storage tank 11 and the liquid guide pipe 22.

[0069] Second step, the operator controls the closed sampler 1 to evacuate the liquid storage tank 11, so that the naphtha in the reaction kettle flows through the diversion port 232 into the liquid guide pipe 22. The resistance plate 24 automatically adjusts the flow rate of the naphtha by pulling the adjusting pipe 241 downward.

[0070] Third step, the naphtha flows upward along the liquid guide pipe 22 into the liquid storage tank 11 and pushes the annular floating plate 31 upward by buoyancy, so that the stirring row frame 341 in the naphtha extending downward into the liquid storage tank 11 by gravity stirs the naphtha, thereby improving the uniformity of the naphtha in the liquid storage tank 11.

[0071] Fourth step, the operator makes the naphtha in the liquid storage tank 11 flow into the sampling bottle, and then makes the naphtha in the liquid storage tank 11 be discharged into the reaction kettle again through the liquid guide pipe 22 under the action of gravity.

[0072] Fifth step, the annular floating plate 31 moves downward synchronously with the liquid level of the naphtha under the dual action of its own gravity and the elastic force of the constant force spring, so that the scraping frame 32 scrapes the naphtha attached to the inner wall of the liquid storage tank 11 through the spiral scraping structure thereon. At the same time, through the spiral structure of its scraper, the scraped naphtha can also be conveyed downward, so that the attached naphtha drips and flows back into the reaction kettle.

[0073] Step 6: Replace the sampling bottle, and move the liquid guide pipe 22 downward again so that the linkage column 222 moves to the second last point from left to right in the chute of the chute plate 223. Repeat the above steps to sample the naphtha in the reactor into the sampling bottle. Then move the liquid guide pipe 22 downward again so that the linkage column 222 moves to the second last point from left to right in the chute of the chute plate 223, and sample again. Subsequently, move the liquid guide pipe 22 upward to the initial position, so as to sample the naphtha at different depth positions in the reactor.

[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. A multi-process detection and sampling system for naphtha production, including a closed sampler. The closed sampler includes a liquid storage tank for temporarily storing naphtha, and is characterized in that, The lower side of the closed sampler is provided with a liquid suction mechanism for extending into different depths inside the reactor to take samples, and the closed sampler is provided with a cleaning mechanism for scraping the inner wall of the liquid storage tank; The liquid suction mechanism comprises a connecting tube fixedly mounted on the lower side of the closed sampler, a liquid guide tube is slidably arranged inside the connecting tube, and an opening and closing component for controlling the connection between the liquid guide tube and the reactor is arranged on the liquid guide tube. When the liquid guide tube is manually moved downward to a specified depth below the naphtha liquid level in the reactor, the liquid guide tube and the reactor can be connected through the opening and closing component; The cleaning mechanism includes an annular floating plate that slides up and down inside the liquid storage tank, a scraper frame is rotatably arranged on the outer side of the annular floating plate, the upper and lower parts of the scraper frame are both annular plate structures, and a spiral scraper structure is arranged at equal intervals in the middle of the scraper frame, and a constant force spring is arranged between the upper side of the annular floating plate and the liquid storage tank.

2. The multi-process detection and sampling system for naphtha production according to claim 1, wherein The opening and closing assembly includes a blocking cover that is slidably arranged at the lower end of the inner side of the liquid guide tube. The lower side of the blocking cover is a closed structure, and the lower end of the outer side of the blocking cover is provided with a plurality of guide ports that connect the inside and the outside thereof at equal intervals along its circumference.

3. The multi-process detection and sampling system for naphtha production according to claim 2, wherein, A connecting rod is fixedly installed on the upper side of the blocking cover, a tension spring is arranged between the connecting rod and the liquid guide tube, a rotating handle is rotatably connected to the outer side of the liquid guide tube through a branch tube, a vortex groove wheel is fixedly installed on one end of the rotating handle located inside the liquid guide tube, and the upper end of the connecting rod is slidably connected to the inside of the groove of the vortex groove wheel.

4. A multi-process inspection and sampling system for naphtha production according to claim 2, characterized in that A resistance plate is provided inside the blocking cover for sliding back and forth, the resistance plate corresponds to one of the guide ports, a spiral spring is provided between the resistance plate and the blocking cover, an adjustment tube is provided inside the blocking cover for sliding up and down, and a linkage plate is hinged between the resistance plate and the adjustment tube.

5. The multi-process detection and sampling system for naphtha production according to claim 1, characterized in that, The lower end of the liquid guide tube is provided with a blocking block which slides forward and backward through the support plate, a linkage column is fixedly installed on the upper side of the blocking block, a guide groove plate is provided on the upper side of the support plate of the liquid guide tube for sliding left and right, and the linkage column is slidably connected to the slide groove of the guide groove plate.

6. The multi-process detection and sampling system for naphtha production according to claim 5, wherein, A cover plate is fixedly installed at the rear end of the support plate of the liquid guide tube, a rotating box is rotatably arranged on the left side of the cover plate, a spring is arranged between the cover plate and the rotating box, and a threaded rod threadably connected to the rotating box is fixedly installed at the rear side of the guide groove plate.

7. A multi-process inspection and sampling system for naphtha production according to claim 6, characterized in that A support plate is fixedly installed at the lower end of the rear side of the liquid guiding tube, a buoyancy ball is placed on the upper part of the support plate, and the buoyancy ball is connected to the rotating box through a thin line without elasticity and wound around the outer side of the rotating box.

8. A multi-process detection and sampling system for naphtha production according to claim 1, characterized in that, A lead screw is fixedly installed inside the liquid storage tank, a ball nut is threadedly connected to the outer side of the lead screw, the ball nut is rotatably connected to the annular floating plate, a planetary gear is fixedly installed on the ball nut, and an external gear meshing with the planetary gear is fixedly installed on the scraper frame.

9. A multi-process inspection and sampling system for naphtha production according to claim 8, characterized in that, A linkage ring is rotatably arranged inside the annular floating plate, a stirring rack is slidably arranged inside the linkage ring, and an internal gear meshing with the planetary gear is fixedly installed on the upper side of the linkage ring.

10. A multi-process detection and sampling system for naphtha production according to claim 8, characterized in that, A support seat is fixedly installed on the upper side of the annular floating plate, and a toggle plate is provided on the upper side of the support seat for radial sliding along the liquid storage tank. The side of the toggle plate away from the axis of the liquid storage tank is an arc structure, and a return spring is provided between the side of the toggle plate close to the axis of the liquid storage tank and the support seat.

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