A multi-process detection and sampling system for naphtha production

Abstract

The present invention relates to the field of detection and sampling technology, and specifically to a multi-process detection and sampling system for naphtha production, comprising a closed sampler, the closed sampler comprising a liquid storage tank for temporarily storing naphtha, a liquid suction mechanism for extending into different depth positions inside a reactor for sampling, and a cleaning mechanism for scraping the inner wall of the liquid storage tank provided inside the closed sampler. The present invention adopts a liquid guide tube in the liquid suction mechanism in cooperation with an opening and closing component, and can accurately extend into different liquid layer positions in the reactor for sampling by manually adjusting the sliding depth of the liquid guide tube and the opening and closing of the diversion port of the plugging cover. The present invention adopts the synergistic effect of an annular floating plate, a scraping frame and a constant force spring in the cleaning mechanism, and drives the spiral scraper of the scraping frame to rotate and scrape the inner wall of the liquid storage tank by sliding the annular floating plate up and down with the liquid level, thereby effectively removing high-viscosity naphtha residue and avoiding cross-contamination of samples from different batches.

Description

Technical Field

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

[0002] Naphtha is an important light petroleum fraction, widely used in the production of chemical raw materials and fuels. Among its physical properties, viscosity and fluidity have a significant impact on sampling and testing 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; at high temperatures, the fluidity is enhanced, and uneven stratification may occur.

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

[0004] However, the existing closed sampler still has obvious shortcomings. First, the liquid suction mechanism can only sample at a fixed depth, which makes it difficult to cover the different liquid layers in the reactor, resulting in the test results being unable to fully reflect the actual distribution status of naphtha; second, the liquid storage tank relies on gravity to naturally empty the naphtha sample, but due to its viscosity and tank structure, some liquid is likely to remain on the inner wall. These residues may contaminate subsequent batches of samples, causing cross-contamination problems and seriously affecting the accuracy of the test 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] In order to solve the above technical problems, the technical solution adopted by the present invention is: 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, a liquid suction mechanism for extending into different depths inside the reactor for sampling is provided on the lower side of 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 aspiration mechanism includes a connecting tube fixedly installed on the lower side of the closed sampler, a liquid guide tube is provided on the inner side of the connecting tube for sliding up and down, and an opening and closing component is provided on the liquid guide tube for controlling the connection between the liquid guide tube and the reactor. 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.

[0008] 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 outside 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.

[0009] Preferably, the opening and closing assembly includes a blocking cover that is slidably arranged at the lower end of the inner side of the catheter, 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 number of diversion ports that connect the inside and outside of the blocking cover at equal intervals along its circumference.

[0010] Preferably, a connecting rod is fixedly installed on the upper side of the blocking cover, a tension spring is provided 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 slot of the vortex groove wheel.

[0011] Preferably, a resistance plate is provided on the inner side of the blocking cover for sliding back and forth, the resistance plate corresponds to one of the guide ports, a coil spring is provided between the resistance plate and the blocking cover, an adjustment tube is provided on the inner side of the blocking cover for sliding up and down, and a linkage plate is hinged between the resistance plate and the adjustment tube.

[0012] Preferably, a blocking block is provided at the lower end of the liquid guide tube so as to slide 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 so as to slide left and right, and the linkage column is slidably connected to the slide groove of the guide groove plate.

[0013] Preferably, a cover plate is fixedly installed on 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 threadedly connected to the rotating box is fixedly installed on the rear side of the guide groove plate.

[0014] Preferably, a supporting plate is fixedly mounted on the lower rear end of the catheter, a buoyancy ball is placed on the upper portion of the supporting plate, and the buoyancy ball is connected to the rotating box via a thin line without elasticity and wrapped around the outer side of the rotating box.

[0015] Preferably, a screw is fixedly installed inside the liquid storage tank, a ball nut is threadedly connected to the outside of the 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.

[0016] Preferably, a linkage ring is rotatably provided inside the annular floating plate, a stirring rack is slidably provided inside the linkage ring, and an internal gear meshing with the planetary gear is fixedly installed on the upper side of the linkage ring.

[0017] Preferably, a support seat is fixedly installed on the upper side of the annular float, 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-shaped 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.

[0018] The beneficial effects of the present invention are as follows: 1. The present invention adopts the combination of the liquid guide tube in the liquid suction mechanism and the opening and closing component. By manually adjusting the sliding depth of the liquid guide tube and the opening and closing of the guide port of the plugging cover, it can accurately reach into the different liquid layer positions in the reactor to take samples, which solves the limitation of traditional technology that can only take samples at a fixed depth, and ensures that the test results fully reflect the actual stratification state of naphtha.

[0019] 2. The present invention adopts the synergistic effect of the annular floating plate, scraping frame and constant force spring in the cleaning mechanism. The annular floating plate slides up and down with the liquid level and cooperates with the elastic force of the constant force spring itself to drive the spiral scraper of the scraping frame to rotate and scrape the inner wall of the liquid storage tank, effectively removing high-viscosity naphtha residue and avoiding cross-contamination of different batches of samples.

[0020] 3. The present invention adopts a linkage mechanism between a buoyancy ball and a rotating box. The buoyancy ball pulls a thin wire to drive the rotating box to rotate, so that the guide groove plate drives the blocking block to move back and forth. As a result, when the lower end of the liquid guide tube does not reach the specified depth below the naphtha liquid surface, the blocking cover cannot be moved, and then the naphtha cannot be sampled, thereby ensuring the accuracy of the sampling depth and the accuracy of the test results.

[0021] Fourth, the present invention adopts a resistance plate that can detect the flow rate of naphtha and adjust the opening size of the guide port in real time through the regulating tube, so that naphtha of different viscosities can flow into the liquid storage tank at the same flow rate. By automatically adjusting the flow rate, the laminar flow state can be maintained, ensuring that each liquid layer is collected independently, and preventing the phenomenon of stratified sample mixing caused by excessive flow rate.

[0022] 5. The present invention adopts a stirring rack that rotates synchronously with the scraper frame to stir and mix the naphtha inside the liquid storage tank to ensure the uniformity of the sample. The spiral scraper on the scraper frame can be moved by the toggle plate, 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 accompanying drawings and examples.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a partial cross-sectional view of the closed sampler, connecting tube, liquid guide tube and opening and closing assembly of 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 guide tube, the blocking cover, the cover plate and the guide channel 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, lead screw, ball nut and linkage ring in the present invention.

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

[0033] Figure: 1, closed sampler; 2, liquid suction mechanism; 3, cleaning mechanism; 11, liquid storage tank; 21, connecting pipe; 22, liquid guide tube; 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 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 following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0035] See Figure 1 、 Figure 2 and Figure 7A multi-process detection and sampling system for naphtha production includes a closed sampler 1, which includes a liquid storage tank 11 for temporarily storing naphtha. A liquid suction mechanism 2 is provided on the lower side of the closed sampler 1 for extending into different depths inside the reactor for sampling. A cleaning mechanism 3 is provided inside the closed sampler 1 for scraping the inner wall of the liquid storage tank 11.

[0036] When it is necessary to sample and test the naphtha in the reactor, first operate the closed sampler 1 so that the liquid storage tank 11 is connected to the liquid suction mechanism 2, then move the liquid suction mechanism 2 downward to extend into the naphtha at different depths in the reactor, and then operate the closed sampler 1 to suck the naphtha in the reactor into the liquid storage tank 11 through the liquid suction mechanism 2, and at the same time stir the naphtha in the liquid storage tank 11 through the cleaning mechanism 3.

[0037] Then, the closed sampler 1 is operated to cut off the connection between the liquid storage tank 11 and the liquid suction mechanism 2, and the naphtha sample in the liquid storage tank 11 flows into the sampling bottle through the closed sampler 1, and then the closed sampler 1 is operated again to connect the liquid storage tank 11 with the liquid suction mechanism 2, thereby discharging the remaining naphtha inside the liquid storage tank 11 into the reactor, and at the same time, the naphtha attached to the inner wall of the liquid storage tank 11 is scraped off by the cleaning mechanism 3.

[0038] Afterwards, the sampling bottle is replaced and the liquid aspiration mechanism 2 is moved downward again, and the above steps are repeated to sample the naphtha at different positions in the reactor.

[0039] See Figure 1 and Figure 2 The liquid aspiration mechanism 2 includes a connecting tube 21 fixedly installed on the lower side of the closed sampler 1. A liquid guide tube 22 is provided on the inner side of the connecting tube 21 for sliding up and down. An opening and closing component 23 for controlling the connection between the liquid guide tube 22 and the reactor is provided on the liquid guide tube 22. When the liquid guide tube 22 is manually moved downward to a specified depth below the naphtha liquid level in the reactor, the liquid guide tube 22 and the reactor can be connected through the opening and closing component 23.

[0040] See Figure 2 and Figure 4 The opening and closing component 23 includes a blocking cover 231 that is slidably arranged at the lower end of the inner side of the liquid guide tube 22. The lower side of the blocking cover 231 is a closed structure, and the lower end of the outer side of the blocking cover 231 is provided with a plurality of guide ports 232 at equal intervals along its circumference to connect the inside and outside.

[0041] See Figure 2 、 Figure 3 and Figure 4A connecting rod 233 is fixedly installed on the upper side of the blocking cover 231, and a tension spring is provided between the connecting rod 233 and the liquid guide tube 22. The outer side of the liquid guide tube 22 is rotatably connected to a rotating handle 234 through a branch pipe. The rotating handle 234 is located inside the liquid guide tube 22 and one end thereof is fixedly installed with a vortex groove wheel 235. The upper end of the connecting rod 233 is slidably connected to the inside of the slot of the vortex groove wheel 235.

[0042] It should be noted that the notches on the vortex sheave 235 are in a vortex line structure, so that when the vortex sheave 235 rotates, the notches thereon can push the connecting rod 233 to move along the radial direction of the vortex sheave 235 .

[0043] In the initial state, the lower side of the blocking cover 231 is flush with the lower side of the liquid guide tube 22, so that the liquid guide tube 22 blocks the guide port 232 to prevent naphtha from flowing into the liquid guide tube 22, and the upper end of the connecting rod 233 is located at the position of the notch of the vortex groove wheel 235 close to the axis of the vortex groove wheel 235.

[0044] See Figure 2 、 Figure 4 and Figure 5 The lower end of the liquid guide tube 22 is provided with a blocking block 221 through the support plate for sliding back and forth. A linkage column 222 is fixedly installed on the upper side of the blocking block 221. A guide groove plate 223 is provided on the upper side of the support plate of the liquid guide tube 22 for sliding left and right. The linkage column 222 is slidably connected to the slide groove of the guide groove plate 223.

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

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

[0047] Continue reading Figure 4 and Figure 5 A supporting plate 228 is fixedly installed at the lower end of the rear side of the catheter 22, and a buoyancy ball 229 is placed on the upper part of the supporting plate 228. The buoyancy ball 229 is connected to the rotating box 225 through a thin wire without elasticity and wrapped around the outside of the rotating box 225.

[0048] In the initial state, the clockwork spring 226 drives the rotating box 225 to rotate by its own elastic force, so that the rotating box 225 pulls the buoyancy ball 229 against the upper part of the supporting plate 228 by the winding thin wire.

[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 tube 22 to move downward through the branch pipe. When the liquid guide tube 22 drives the buoyancy ball 229 to move to the liquid level of the naphtha, the naphtha pushes the buoyancy ball 229 to float on the liquid level of the naphtha through buoyancy, so that the liquid guide tube 22 drives the rotating box 225 to move downward relative to the buoyancy ball 229, and the buoyancy ball 229 pulls the rotating box 225 to rotate through the thin wire.

[0050] The rotating box 225 drives the guide slot plate 223 to move to the left through the threaded rod 227. At the same time, the rotating box 225 winds the clockwork spring 226 to store force. When the guide slot plate 223 moves to the left, it pushes the linkage column 222 backward through the sliding groove thereon. When the linkage column 222 moves to the first and last point of the sliding groove of the guide slot plate 223 from left to right, the linkage column 222 drives the blocking block 221 to move completely 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 vortex groove wheel 235 to rotate synchronously, so that the position of the vortex groove wheel 235 slot away from the axis of the vortex groove wheel 235 rotates to the bottom, so that the vortex groove wheel 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 tube 22 no longer blocks the guide port 232.

[0052] See Figure 2 、 Figure 4 and Figure 6 A resistance plate 24 is provided on the inside of the blocking cover 231 for sliding back and forth. The resistance plate 24 corresponds to one of the guide ports 232. A coil spring is provided between the resistance plate 24 and the blocking cover 231. An adjustment tube 241 is provided on the inside of the blocking cover 231 for sliding up and down. A linkage plate 242 is hinged between the resistance plate 24 and the adjustment tube 241.

[0053] When the diversion port 232 moves to the lower part of the liquid guide tube 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, and then the liquid storage tank 11 absorbs the naphtha in the reactor through the liquid guide tube 22, so that the naphtha in the reactor flows into the liquid guide tube 22 through the diversion port 232.

[0054] When naphtha flows into the liquid guide tube 22 through the guide port 232, the naphtha pushes the resistance plate 24 to move backward, so that the resistance plate 24 pulls the regulating tube 241 downward through the linkage plate 242. The curved wall of the regulating tube 241 blocks all the guide ports 232, thereby reducing the opening size of the guide port 232, and then automatically reducing the flow rate of the naphtha, thereby maintaining a laminar flow state, ensuring that each liquid layer is collected independently, and preventing the phenomenon of stratified sample mixing caused by excessive flow rate.

[0055] See Figure 1 、 Figure 7 and Figure 9 The cleaning mechanism 3 includes an annular floating plate 31 that slides up and down inside the liquid storage tank 11, and a scraper frame 32 is rotatably arranged on the outside of the annular floating plate 31. The upper and lower parts of the scraper frame 32 are both annular plate structures. A spiral scraper structure is arranged at equal intervals in the middle of the scraper frame 32, and a constant force spring is arranged between the upper side of the annular floating plate 31 and the liquid storage tank 11.

[0056] See Figure 7 、 Figure 8 and Figure 9 A screw 33 is fixedly installed inside the liquid storage tank 11, and a ball nut 331 is threadedly connected to the outer side of the screw 33. The ball nut 331 is rotatably connected to the annular floating plate 31, and a planetary gear 332 is fixedly installed on the ball nut 331. The scraping frame 32 is fixedly installed with an external gear 333 that meshes with the planetary gear 332.

[0057] Continue reading Figure 7 、 Figure 8 and Figure 9 A linkage ring 34 is rotatably provided inside the annular floating plate 31 , a stirring rack 341 is slidably provided inside the linkage ring 34 , and an internal gear 342 meshing with the planetary gear 332 is fixedly installed on the upper side of the linkage ring 34 .

[0058] When naphtha flows upward along the liquid guide tube 22 to the inside of the liquid storage tank 11, the naphtha pushes the annular float 31 upward through buoyancy, and the annular float 31 compresses the constant force spring. At the same time, the annular float 31 drives the scraper frame 32 and the linkage ring 34 to move upward synchronously, and the stirring rack 341 moves downward relative to the linkage ring 34 under the action of gravity. When the annular float 31 moves upward, it drives the ball nut 331 to move upward along the screw 33, so that the ball nut 331 and the screw 33 rotate in coordination.

[0059] The ball nut 331 drives the internal gear 342 and the external gear 333 to rotate synchronously through the planetary gear 332, and the internal gear 342 drives the stirring rack 341 to rotate through the linkage ring 34, so that the stirring rack 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] The operator then turns the valve between the liquid storage tank 11 and the liquid guide tube 22 to cut off the connection between the liquid storage tank 11 and the liquid guide tube 22, and stops extracting the gas inside the liquid storage tank 11. The operator then operates the valve on the lower left side of the liquid storage tank 11 to allow the naphtha inside the liquid storage tank 11 to 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 guide tube 22 is opened, so that the naphtha inside the liquid storage tank 11 is discharged into the reactor again through the liquid guide tube 22 under the action of gravity.

[0061] When the amount of naphtha in the liquid storage tank 11 decreases, the liquid level of the naphtha in the liquid storage tank 11 gradually decreases. The annular float 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 ball nut 331 drives the scraper rack 32 to rotate through the external gear 333. The scraper rack 32 scrapes the naphtha attached to the inner wall of the liquid storage tank 11 through the spiral scraper structure thereon. At the same time, the spiral structure of its scraper can also transmit the scraped naphtha downward, so that the attached naphtha drips and flows back into the reactor.

[0062] See 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 side of the toggle plate 351 away from the axis of the liquid storage tank 11 is an arc-shaped structure, and a return spring is provided between the side of the toggle plate 351 close to the axis of the liquid storage tank 11 and the support seat 35.

[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 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 in 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] After 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 to block it.

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

[0067] When the linkage column 222 moves to the second last point of the guide plate 223 from left to right, repeat the above steps to sample the naphtha in the reactor into the sampling bottle, and then move the liquid guide tube 22 downward again to make the linkage column 222 move to the second last point of the guide plate 223 from left to right, sample again, and then move the liquid guide tube 22 upward to the initial position, so as to sample the naphtha at different depths in the reactor.

[0068] See Figures 1 to 9 When sampling naphtha in the reactor, the present invention also includes the following steps: In the first step, the operator holds the rotating handle 234 and moves it downward, so that the guide groove plate 223 pushes the linkage column 222 backward to the first last point of the slide groove 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 tube 22.

[0069] In the second step, the operator controls the closed sampler 1 to evacuate the liquid storage tank 11, so that the naphtha in the reactor flows into the liquid guide pipe 22 through the guide port 232, and the resistance plate 24 automatically adjusts the flow rate of the naphtha by pulling the regulating pipe 241 downward.

[0070] In the third step, the naphtha flows upward along the liquid guide pipe 22 to the inside of the liquid storage tank 11, and pushes the annular float plate 31 upward by buoyancy, so that the stirring rack 341 extending downward into the naphtha inside the liquid storage tank 11 by gravity stirs the naphtha, thereby improving the uniformity of the naphtha in the liquid storage tank 11.

[0071] In the fourth step, the operator allows the naphtha in the liquid storage tank 11 to flow into the sampling bottle, and then allows the naphtha in the liquid storage tank 11 to be discharged into the reactor again through the liquid conduit 22 under the action of gravity.

[0072] In the fifth step, the annular float 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 scraper structure thereon. At the same time, the spiral structure of its scraper can also transmit the scraped naphtha downward, so that the attached naphtha drips and flows back into the reactor.

[0073] Step 6: Replace the sampling bottle and move the liquid guide tube 22 downward again so that the linkage column 222 moves to the second last point of the guide plate 223 from left to right. Repeat the above steps to sample the naphtha in the reactor into the sampling bottle, and then move the liquid guide tube 22 downward again so that the linkage column 222 moves to the second last point of the guide plate 223 from left to right. Sampling is performed again, and then the liquid guide tube 22 is moved upward to the initial position to sample the naphtha at different depths in the reactor.

[0074] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A multi-process detection sampling system for naphtha production, comprising a closed sampler, the closed sampler including a liquid storage tank for temporarily storing naphtha, characterized in that: The lower side of the closed sampler is provided with a liquid suction mechanism for inserting into the reactor at different depths for sampling, and the inside of the closed sampler is provided with a cleaning mechanism for scraping the inner wall of the liquid storage tank; The liquid aspiration mechanism includes a connecting tube fixedly mounted on the lower side of the closed sampler, a liquid guide tube is provided on the inner side of the connecting tube for sliding up and down, and an opening and closing assembly for controlling the connection between the liquid guide tube and the reactor is provided 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 are connected through the opening and closing assembly; 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 outside 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. A constant force spring is provided between the upper side of the annular floating plate and the liquid storage tank; The opening and closing component 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 diversion ports that connect the inside and the outside thereof at equal intervals along its circumference.

2. A naphtha production multi-process detection sampling system according to claim 1, characterized in that: A connecting rod is fixedly installed on the upper side of the blocking cover, a tension spring is provided 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 slot of the vortex groove wheel.

3. A naphtha production multi-process detection sampling system according to claim 1, characterized in that: A resistance plate is provided on the inner side of the blocking cover for sliding back and forth, the resistance plate corresponds to one of the guide ports, a coil spring is provided between the resistance plate and the blocking cover, an adjustment tube is provided on the inner side of the blocking cover for sliding up and down, and a linkage plate is hinged between the resistance plate and the adjustment tube.

4. A naphtha production multi-process detection sampling system 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, and 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.

5. A naphtha production multi-process detection sampling system according to claim 4, characterized in that: A cover plate is fixedly installed on 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 threadedly connected to the rotating box is fixedly installed on the rear side of the guide groove plate.

6. A naphtha production multi-process detection sampling system according to claim 5, characterized in that: A supporting 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 supporting plate, and the buoyancy ball is connected to the rotating box through a thin line without elasticity and wrapped around the outside of the rotating box.

7. The naphtha production multi-process detection sampling system 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 outside 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.

8. A naphtha production multi-process detection and sampling system according to claim 7, characterized in that: A linkage ring is rotatably provided inside the annular floating plate, a stirring rack is slidably provided inside the linkage ring, and an internal gear meshing with the planetary gear is fixedly installed on the upper side of the linkage ring.

9. A naphtha production multi-process detection and sampling system according to claim 7, 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 sliding radially 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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