Automatic sampling device for petrochemical products

Abstract

The invention relates to the technical field of sampling devices, in particular to an automatic sampling device for petrochemical products. Comprising a sampling box and a rotating wheel rotationally connected into the sampling box; a sampling belt is wound on the surface of the rotating wheel; the sampling belt is made of a PTFE (Polytetrafluoroethylene) material; one end of the sampling belt is fixedly connected with the rotating wheel; a sampling opening is formed in the side wall of the sampling belt; a sealing rod is connected in the sampling opening in a sliding and sealing manner; by arranging the sampling belt, the sampling belt entering the oil tank can synchronously extract oil liquid in oil layers with different heights in the oil tank at a time, on one hand, the sampler does not need to repeatedly penetrate through the oil layers, and the problem that oil liquid components between adjacent layers are polluted by residual oil liquid on the pipe wall of a traditional sampler is avoided; the sampling ports of the sampling belt are mutually independent, so that the problem of mixing of the oil liquid of the oil layers with different heights is avoided, the accuracy of the detected oil liquid data is improved, and in addition, the sampling efficiency is effectively improved compared with the traditional single-point sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and more specifically, to an automated sampling device for petrochemical products. Background Art

[0002] Petrochemical products refer to various petrochemical products manufactured through a series of chemical processing processes using petroleum or natural gas as raw materials; petrochemical products can be divided into fuels and oils (such as refined oil, lubricating oil, asphalt), organic chemical raw materials (such as ethylene, propylene), synthetic materials (such as plastics, rubbers), and fine chemical products (such as coatings, pharmaceutical intermediates), etc.; among them, during the production and transportation of refined oil, it is usually necessary to sample and analyze it. However, the refined oil in existing storage tanks often forms a stratification phenomenon due to density differences (such as sediment aggregation or water deposition). Therefore, it is necessary to sample oil layers at different heights in the oil tank to ensure the accuracy of oil fluid data.

[0003] Existing samplers can only extract oil fluid samples at a certain depth in the oil tank at a time, resulting in a single sample. If multiple samplings are taken, on the one hand, the sampler will repeatedly cross the oil layer, causing the oil fluid remaining on the sampler tube wall to contaminate the components between adjacent layers, and the sampling efficiency is low. On the other hand, after the previous sampling is completed, there will be residual oil fluid on the inner wall of the tube. When extracting an oil sample at a certain depth again, the residual oil fluid will be mixed with the new sample, resulting in inaccurate oil fluid data detected.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes an automated sampling device for petrochemical products, which solves the above technical problems. Summary of the Invention

[0005] To make up for the deficiencies of the prior art, the present invention proposes an automated sampling device for petrochemical products. By setting a sampling belt, the sampling belt entering the oil tank can synchronously extract oil fluids from oil layers at different heights in the oil tank at one time. On the one hand, it makes the sampler not need to repeatedly cross the oil layer, avoiding the problem of the oil fluid remaining on the traditional sampler tube wall contaminating the oil fluid components between adjacent layers. On the other hand, each sampling port of the sampling belt is independent of each other, so that the oil fluids from oil layers at different heights taken will not be mixed, improving the accuracy of the detected oil fluid data. In addition, compared with traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An automatic sampling device for petrochemical products according to the present invention includes a sampling box and a rotating wheel rotatably connected inside the sampling box; a sampling belt is wound around the surface of the rotating wheel; the sampling belt is made of PTFE material: one end of the sampling belt is fixedly connected to the rotating wheel; a sampling port is provided on the side wall of the sampling belt; a sealing rod is slidably and sealingly connected inside the sampling port; a cavity is provided inside the sampling belt; a slider is slidably connected inside the cavity; a steel wire rope is fixedly connected to the upper end of the slider; a U-shaped groove is provided inside the sampling belt; one end of the U-shaped groove communicates with the sampling port, and the other end communicates with the cavity; a U-shaped plate is slidably and sealingly connected inside the U-shaped groove; the U-shaped plate is fixedly connected to the sealing rod; a cylindrical groove is provided on the side wall of the slider; a push rod is slidably and sealingly connected inside the cylindrical groove; a pushing unit is installed inside the slider; the pushing unit is used to push the push rod to slide inside the cylindrical groove. A traction unit, the traction unit is installed inside the rotating wheel; the traction unit is used to traction the slider to rise.

[0007] Preferably, the traction unit includes a traction rod; a cylindrical cavity is provided inside the rotating wheel; the traction rod is rotatably connected inside the cylindrical cavity; the end of the traction rod away from the cylindrical cavity is provided as a rectangular end; a rocker is sleeved on the surface of the traction rod; a square groove is provided at one end of the rotating wheel close to the rocker; the rocker is slidably connected inside the square groove; a rectangular groove is provided on the side of the rocker away from the square groove.

[0008] Preferably, a threaded groove is provided at the upper end of the sampling box; a threaded rod is rotatably connected inside the threaded groove; the lower end of the threaded rod is made of fluororubber material.

[0009] Preferably, an electromagnetic sheet is inlaid at one end of the sampling belt away from the rotating wheel; a thin film layer made of PTFE material is fixedly connected to the surface of the electromagnetic sheet.

[0010] Preferably, the pushing unit includes an electromagnetic plate; the electromagnetic plate is inlaid at the bottom of the cylindrical groove; a magnet is inlaid inside the push rod.

[0011] Preferably, the pushing unit includes a hose; an air passage is provided at the bottom of the cylindrical groove; an air cavity penetrating the sampling box is provided inside the traction rod; one end of the hose communicates with the air passage, and the other end communicates with the air cavity; the steel wire rope is fixedly connected to the inner wall of the hose.

[0012] Preferably, air holes communicating with the air cavity are provided on the upper end surface of the sampling box; solenoid valves are installed in both the air holes and the air cavity.

[0013] Preferably, a through groove is provided on one side of the sampling box; a rubber glove is fixedly connected inside the through groove; the sampling box is made of acrylic material.

[0014] The beneficial effects of the present invention are as follows: 1. By providing a sampling belt, the sampling belt entering the oil tank can synchronously extract the oil liquid from different height oil layers in the oil tank at one time. On the one hand, it enables the sampler to avoid repeatedly passing through the oil layer, preventing the problem of residual oil liquid on the pipe wall of the traditional sampler contaminating the oil liquid components between adjacent layers. On the other hand, the sampling ports of the sampling belt are independent of each other, preventing the mixing of the oil liquid taken from different height oil layers, improving the accuracy of the detected oil liquid data. In addition, compared with the traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

[0015] 2. By providing air holes, which are connected to the air cavity and the external nitrogen delivery pipeline, the present invention realizes the delivery of nitrogen from the external nitrogen delivery pipeline into the sampling box, and then discharges the air in the sampling box. When the sampling belt enters the oil tank or the oil tanker, the sampling belt only brings the nitrogen in the sampling box into the oil tank or the oil tanker. During the sampling process, it can effectively prevent air from entering the oil tank or the oil tanker, prevent the oxygen in the air from contacting the oil product, significantly reduce the risk of fire and explosion, and thus enable the present invention to safely sample oil tanks or oil tankers containing gasoline, diesel, etc., expanding the practical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a perspective view of the sampling box equipped with an electromagnetic plate in the present invention; Figure 2 is Figure 1 an enlarged view of part A in Figure 3 is Figure 1 an enlarged view of part B in Figure 4 is a partial cross-sectional view of the sampling belt with an air passage opened in the present invention; Figure 5 is Figure 4 an enlarged view of part C in Figure 6 is a partial cross-sectional view of the sampling box equipped with a hose in the present invention; Figure 7 is Figure 6 an enlarged view of part D in In the figure: 1. Sampling box; 11. Rotating wheel; 111. Rocker; 112. Square groove; 113. Rectangular groove; 12. Sampling belt; 121. Sampling port; 122. Sealing rod; 13. Cavity; 131. Slide block; 132. Steel wire rope; 133. Cylindrical groove; 134. Pushing rod; 135. Electromagnetic plate; 136. Magnet; 14. U-shaped groove; 141. U-shaped plate; 15. Traction rod; 151. Cylindrical cavity; 16. Threaded groove; 161. Threaded rod; 17. Electromagnetic sheet; 171. Thin film layer; 18. Hose; 181. Air passage; 182. Air cavity; 183. Air hole; 184. Solenoid valve; 19. Through groove. Detailed implementation mode

[0018] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0019] As Figures 1 to 7 shown, the present invention includes the following embodiments: Embodiment 1, an automatic sampling device for petrochemical products, including a sampling box 1 and a rotating wheel 11 rotatably connected inside the sampling box 1; a sampling belt 12 is wound on the surface of the rotating wheel 11; the sampling belt 12 is made of PTFE material: one end of the sampling belt 12 is fixedly connected to the rotating wheel 11; a sampling port 121 is opened on the side wall of the sampling belt 12; a sealing rod 122 is slidably and sealingly connected inside the sampling port 121; a cavity 13 is opened inside the sampling belt 12; a slide block 131 is slidably connected inside the cavity 13; a steel wire rope 132 is fixedly connected to the upper end of the slide block 131; a U-shaped groove 14 is opened inside the sampling belt 12; one end of the U-shaped groove 14 communicates with the sampling port 121, and the other end communicates with the cavity 13; a U-shaped plate 141 is slidably and sealingly connected inside the U-shaped groove 14; the U-shaped plate 141 is fixedly connected to the sealing rod 122; a cylindrical groove 133 is opened on the side wall of the slide block 131; a pushing rod 134 is slidably and sealingly connected inside the cylindrical groove 133; a pushing unit is installed inside the slide block 131; the pushing unit is used to push the pushing rod 134 to slide inside the cylindrical groove 133; A traction unit, the traction unit is installed inside the rotating wheel 11; the traction unit is used to traction the slide block 131 to rise.

[0020] In this embodiment, the traction unit includes a traction rod 15; a cylindrical cavity 151 is opened inside the rotating wheel 11; the traction rod 15 is rotatably connected inside the cylindrical cavity 151; one end of the traction rod 15 away from the cylindrical cavity 151 is set as a rectangular end; a rocker 111 is sleeved on the surface of the traction rod 15; a square groove 112 is opened at one end of the rotating wheel 11 close to the rocker 111; the rocker 111 is slidably connected inside the square groove 112; a rectangular groove 113 is opened on one side of the rocker 111 away from the square groove 112.

[0021] In this embodiment, a threaded groove 16 is formed at the upper end of the sampling box 1; a threaded rod 161 is rotatably connected in the threaded groove 16; the lower end of the threaded rod 161 is made of fluororubber material.

[0022] In this embodiment, an electromagnetic sheet 17 is inlaid at one end of the sampling belt 12 away from the runner 11; a thin film layer 171 made of PTFE material is fixedly connected to the surface of the electromagnetic sheet 17.

[0023] In this embodiment, the pushing unit includes an electromagnetic plate 135; the electromagnetic plate 135 is inlaid at the bottom of the cylindrical groove 133; a magnet 136 is inlaid inside the push rod 134.

[0024] During operation, the existing sampler can only extract the oil sample at a certain depth in the oil tank at a time, resulting in a single sample. If multiple samplings are taken, on the one hand, the sampler will repeatedly penetrate the oil layer, causing the residual oil on the sampler wall to contaminate the components between adjacent layers, and the sampling efficiency is low. On the other hand, after the previous sampling is completed, there will be residual oil on the inner wall of the pipe. When extracting the oil sample at a certain depth again, the residual oil will be mixed with the new sample, resulting in inaccurate oil data detected.

[0025] In response to this, the present invention sets the sampling belt 12, so that the sampling belt 12 entering the oil tank can synchronously extract the oil in different height oil layers in the oil tank at one time. On the one hand, it enables the sampler to avoid repeatedly penetrating the oil layer, avoiding the problem of residual oil on the wall of the traditional sampler contaminating the oil components between adjacent layers. On the other hand, the sampling ports 121 of the sampling belt 12 are independent of each other, so that the oil in different height oil layers taken will not be mixed, improving the accuracy of the detected oil data. In addition, compared with the traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

[0026] In the initial state, a rubber suction cup is installed at the lower end of the sampling box 1, and a placement opening is formed at the lower end of the sampling box 1. Petroleum fuel products include gasoline, diesel, kerosene, etc. Among them, kerosene is less volatile and is not easily oxidized and self-ignited after contacting with air. Therefore, when sampling kerosene-based refined oil products in the present invention, only need to open the tank opening at the upper end of the oil tank or the oil tanker, and then place the sampling box 1 at the upper end of the oil tank or the oil tanker, so that the tank opening at the upper end of the oil tank or the oil tanker can extend into the placement opening at the lower end of the sampling box 1. Since a rubber suction cup is installed at the lower end of the sampling box 1, the sampling box 1 can be adsorbed on the upper end of the oil tank or the oil tanker through the rubber suction cup at the lower end, so that the sampling box 1 can be stabilized on the upper end of the oil tank or the oil tanker during the sampling process.

[0027] Before sampling, the user first pushes the rocker 111 close to the runner 11. Since one end of the rocker 111 close to the runner 11 is set as a square end that matches the square groove 112, by pushing the rocker 111 close to the runner 11, the square end of the rocker 111 is inserted into the square groove 112 of the runner 11, so that the rocker 111 is slidably connected to the runner 11. At this time, when the user rotates the rocker 111, the rocker 111 can drive the runner 11 to rotate, so that the sampling tape 12 wound on the surface of the runner 11 can be released.

[0028] Since one end of the sampling tape 12 with the electromagnetic sheet 17 is located directly above the placement opening, when the sampling tape 12 is released, the end of the sampling tape 12 with the electromagnetic sheet 17 will fall into the placement opening through the guide rod. And because the port of the oil tank or the oil tanker is inserted into the placement opening, the end of the sampling tape 12 with the electromagnetic sheet 17 will fall into the port of the oil tank or the oil tanker, so that the end of the sampling tape 12 with the electromagnetic sheet 17 will submerge into the kerosene liquid level in the oil tank or the oil tanker and penetrate towards the bottom of the oil tank or the oil tanker until the end of the sampling tape 12 with the electromagnetic sheet 17 contacts the bottom of the oil tank or the oil tanker. At this time, control the electromagnetic sheet 17 to be energized, so that the electromagnetic sheet 17 can generate magnetism and adsorb on the bottom of the oil tank or the oil tanker. Then rotate the runner 11 in the reverse direction, so that the runner 11 drives the sampling tape 12 to wind on its surface, so that the sampling tape 12 is in a straightened state under the pull of the runner 11. At this time, the user only needs to rotate the threaded rod 161, so that the threaded rod 161 spirally enters the thread groove 16, and the threaded rod 161 entering the thread groove 16 contacts the runner 11 through the fluororubber end at the lower end, so that the threaded rod 161 tightly fixes the runner 11 through the friction force between its fluororubber end and the runner 11.

[0029] The electromagnetic sheet 17 will be energized when in use, and the current is likely to cause an explosion in an environment where kerosene vapor exists. Therefore, in the present invention, a thin film layer 171 is wrapped on the surface of the electromagnetic sheet 17, and the thin film layer 171 is made of PTFE material. The thin film layer 171 made of PTFE material not only has good electrical insulation but also has the characteristic of chemical corrosion resistance. On the one hand, the thin film layer 171 can isolate the electromagnetic sheet 17 from direct contact with kerosene, preventing the risk of fire caused by current leakage. On the other hand, the thin film layer 171 made of PTFE material can resist kerosene corrosion, which not only improves the service life of the thin film layer 171 but also enhances the protection effect of the thin film layer 171 on the electromagnetic sheet 17, so that the practicality of the present invention is steadily improved.

[0030] Since the sampling belt 12 extending deep into the oil tank or the tanker is in a taut state, the sampling belt 12 is in a vertical state inside the oil tank or the tanker. The vertical sampling belt 12 is parallel to the oil layer interface, thus ensuring the independent extraction of each layer of oil. If the sampling belt 12 is in an inclined state, the sampling path will obliquely cut the interfaces of multiple oil layers, which will not only disrupt the distribution of the oil layers but also cause the mixing of the oil from different oil layers, affecting the accuracy and representativeness of the sampling. Therefore, keeping the sampling belt 12 in a vertical state can improve the effect of oil layer separation and avoid the mixing of oil from different layers.

[0031] When sampling is required, the user first pulls the rocker 111, causing the square end of the rocker 111 to extend out of the square groove 112, enabling the rocker 111 to move along the towing rod 15 towards the rectangular end of the towing rod 15 until the rectangular end of the towing rod 15 is inserted into the rectangular groove 113 of the rocker 111, making the rocker 111 slidably connected to the towing rod 15. Subsequently, the rocker 111 is rotated, causing the rocker 111 to drive the towing rod 15 to rotate, enabling the rotating towing rod 15 to pull the wire rope 132 to wind around its surface, allowing the wire rope 132 to pull the slider 131 to rise along the cavity 13 until the slider 131 moves to the U-shaped groove 14. Then, the electromagnetic plate 135 is energized, causing the electromagnetic plate 135 to generate the same magnetic pole as the magnet 136. Due to the principle of like poles repelling each other, the magnet 136 is pushed by the magnetic repulsive force to move away from the cylindrical groove 133, causing the magnet 136 to drive the push rod 134 fixedly connected to it to move synchronously, making the push rod 134 contact the U-shaped plate 141 and push the U-shaped plate 141 to drive the sealing rod 122 closer to the slider 131, increasing the space of the sampling port 121 continuously. Since the sampling port 121 is located below the kerosene liquid level and the sealing rod 122 is in sliding sealing contact with the sampling port 121, when the sealing rod 122 slides in the sampling port 121, a sealed space is formed inside the sampling port 121. The backward pulling of the sealing rod 122 generates a negative pressure, so that the kerosene will be sucked into the syringe. And because the sealing performance between the sealing rod 122 and the inner wall of the sampling port 121 is good, the kerosene sucked into the sampling port 121 will not flow out from the sampling port 121.

[0032] Since a plurality of U-shaped grooves 14 are provided and longitudinally distributed along the vertical sampling belt 12, during the upward movement of the slider 131, the sliders 131 from bottom to top will successively drive the U-shaped plates 141 in the plurality of U-shaped grooves 14 to open the corresponding sampling ports 121 through the push rods 134, so as to sample the oil in oil layers at different heights. After the sampling is completed, the user first pushes the traction rod 15 to rotate reversely through the rocker 111, so that the steel wire rope 132 is released, and the slider 131 is reset. Then, the rocker 111 is pushed to be connected to the runner 11, so that the rocker 111 drives the runner 11 to rotate reversely, and the runner 11 can pull the sampling belt 12 to rise, so as to facilitate the user to collect and detect the sampled samples.

[0033] The difference between Embodiment 2 and Embodiment 1 is that: The pushing unit includes a hose 18; an air passage 181 is opened at the bottom of the cylindrical groove 133; an air cavity 182 penetrating through the sampling box 1 is opened inside the traction rod 15; one end of the hose 18 is communicated with the air passage 181, and the other end is communicated with the air cavity 182; the steel wire rope 132 is fixedly connected to the inner wall of the hose 18.

[0034] In this embodiment, an air hole 183 communicated with the air cavity 182 is opened on the upper end surface of the sampling box 1; electromagnetic valves 184 are installed in both the air hole 183 and the air cavity 182.

[0035] In this embodiment, a through groove 19 is opened on one side of the sampling box 1; a rubber glove is fixedly connected in the through groove 19; the sampling box 1 is made of acrylic material.

[0036] During operation, since refined oils such as gasoline and diesel are flammable and explosive, during the sampling process, it is necessary to pay attention to the entry of oxygen in the air into the oil tank to prevent the oxygen in the air from mixing with the oil, reduce the risks of fire and explosion, and ensure the safety of the oil tank and the surrounding area. For this, the present invention realizes the delivery of nitrogen from the external nitrogen delivery pipeline to the inside of the sampling box 1 by providing the air hole 183 and connecting it to the air cavity 182 and the external nitrogen delivery pipeline, so as to discharge the air inside the sampling box 1. When the sampling belt 12 enters the oil tank or the oil tanker, the sampling belt 12 will only bring the nitrogen inside the sampling box 1 into the oil tank or the oil tanker. During the sampling process, it can effectively prevent the entry of air into the oil tank or the oil tanker, prevent the oxygen in the air from contacting the oil product, significantly reduce the risks of fire and explosion, and further enable the present invention to safely sample oil tanks or oil tankers such as gasoline and diesel, thereby improving the practical scope of the present invention.

[0037] In use, the user first controls the solenoid valve 184 in the air hole 183 to open and the solenoid valve 184 in the air duct 181 to close, and controls the nitrogen delivery pipeline from the outside to deliver nitrogen into the sampling box 1 through the air hole 183. Since the density of nitrogen is slightly smaller than that of air, nitrogen will slowly diffuse upward. Therefore, by setting the air hole 183 at the upper end face of the sampling box 1, the nitrogen is delivered from top to bottom into the sampling box 1, so that the nitrogen entering the sampling box 1 slowly fills the sampling box 1 from the top to the bottom, and the air in the sampling box 1 is pushed by the nitrogen and discharged from the placement port at the lower end of the sampling box 1, thus achieving a better nitrogen replacement effect.

[0038] After the air is discharged, the user places the sampling box 1 on the upper end of the oil tank or the oil tanker, so that the port covered with the end cap is inserted into the sampling box 1 through the placement port. At this time, the user inserts the hand into the through groove 19 and wears the rubber gloves fixed in the through groove 19, so that the user removes the end cap inserted into the sampling box 1 through the rubber gloves. Since the sampling box 1 is filled with nitrogen, when the end cap is removed from the sampling box 1, it can prevent the outside air from entering through the port of the oil tank or the oil tanker, further preventing the oxygen in the air from contacting the oil product and significantly reducing the risks of fire and explosion. Then the user rotates the runner 11, so that the sampling tape 12 wound on the runner 11 is released and falls into the port of the oil tank or the oil tanker. The sampling box 1 is made of acrylic material, so that the sampling box 1 made of acrylic material has the characteristics of high transparency, easy processing and chemical resistance. When the user twists the end cap with the rubber gloves, the user can directly observe the internal end cap through the transparent sampling box 1, which is convenient for the user to remove the end cap. Moreover, the sampling box 1 made of acrylic material can also resist the corrosion of refined oil, effectively improving the service life of the sampling box 1.

[0039] When the sampling belt 12 is straightened, the user pulls the rocker 111 which is connected to the towing rod 15. By rotating the rocker 111, the rocker 111 can drive the towing rod 15 to rotate, so that the rotating towing rod 15 can pull the steel wire rope 132 and the hose 18 to wind around the towing rod 15. Since the steel wire rope 132 is fixedly connected to the inner wall of the hose 18, the steel wire rope 132 not only increases the structural strength of the hose 18, but also can support the inner wall of the hose 18 to prevent the hose 18 wound around the towing rod 15 from being flattened due to extrusion deformation, so that the hose 18 wound around the towing rod 15 is still in a good ventilation state. When the slider 131 is straightened at the U-shaped groove 14, the solenoid valve 184 in the air chamber 182 is opened, and the solenoid valve 184 in the air hole 183 is closed, so that the nitrogen gas transported by the nitrogen gas delivery pipeline directly enters the air chamber 182. The nitrogen gas entering the air chamber 182 can enter the cylindrical groove 133 through the hose 18 and the air passage 181, so that the push rod 134 in the cylindrical groove 133 is pushed by the nitrogen gas to extend out of the cylindrical groove 133. The push rod 134 extending out of the cylindrical groove 133 can push the U-shaped plate 141 to drive the sealing rod 122 to approach the slider 131, so that the sampling port 121 is opened, and the oil liquid is sucked into the sampling port 121. Compared with the method of using the electromagnetic plate 135 and the magnet 136 to push the sealing rod 122, the nitrogen gas used in the present invention will not generate a second magnetic field in the oil tank or the oil tanker, so as to prevent the electromagnetic plate 135 from being too close to the electromagnetic sheet 17, resulting in magnetic interference between the electromagnetic plate 135 and the electromagnetic sheet 17, or even causing the magnetic fields of the two to be superimposed or offset from each other, thereby affecting their respective working states. Therefore, using nitrogen gas as the driving source can not only ensure the stable adsorption effect of the electromagnetic sheet 17 on the bottom of the oil tank or the oil tanker, but also ensure that the sealing rod 122 is stably pushed out of the cylindrical groove 133, thereby further improving the actual application effect of the present invention.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated sampling device for petrochemical products, characterized in that: It includes a sampling box (1) and a runner (11) rotatably connected inside the sampling box (1); a sampling belt (12) is wound on the surface of the runner (11); the sampling belt (12) is made of PTFE material: one end of the sampling belt (12) is fixedly connected to the runner (11); a sampling port (121) is formed in the side wall of the sampling belt (12); a sealing rod (122) is slidably and sealingly connected in the sampling port (121); a cavity (13) is formed inside the sampling belt (12); a slider (131) is slidably connected in the cavity (13); a steel wire rope (132) is fixedly connected to the upper end of the slider (131); a U-shaped groove (14) is formed inside the sampling belt (12); one end of the U-shaped groove (14) communicates with the sampling port (121), and the other end communicates with the cavity (13); a U-shaped plate (141) is slidably and sealingly connected in the U-shaped groove (14); the U-shaped plate (141) is fixedly connected to the sealing rod (122); a cylindrical groove (133) is formed in the side wall of the slider (131); a push rod (134) is slidably and sealingly connected in the cylindrical groove (133); a pushing unit is installed inside the slider (131); the pushing unit is used to push the push rod (134) to slide in the cylindrical groove (133). A traction unit, the traction unit is installed inside the runner (11); the traction unit is used to traction the slider (131) to rise.

2. The automated sampling device for petrochemical products according to claim 1, wherein: The traction unit includes a traction rod (15); a cylindrical cavity (151) is formed inside the runner (11); the traction rod (15) is rotatably connected in the cylindrical cavity (151); the end of the traction rod (15) away from the cylindrical cavity (151) is set as a rectangular end; a rocker (111) is sleeved on the surface of the traction rod (15); a square groove (112) is formed at one end of the runner (11) close to the rocker (111); the rocker (111) is slidably connected in the square groove (112); a rectangular groove (113) is formed on the side of the rocker (111) away from the square groove (112).

3. The automatic sampling device for petrochemical products according to claim 2, wherein: A threaded groove (16) is formed at the upper end of the sampling box (1); a threaded rod (161) is rotatably connected in the threaded groove (16); the lower end of the threaded rod (161) is made of fluororubber material.

4. The automatic sampling device for petrochemical products according to claim 3, wherein: An electromagnetic sheet (17) is embedded at one end of the sampling belt (12) away from the runner (11); a thin film layer (171) made of PTFE material is fixedly connected to the surface of the electromagnetic sheet (17).

5. An automated sampling device for petrochemical products according to claim 4, characterized in that: The pushing unit includes an electromagnetic plate (135); the electromagnetic plate (135) is embedded at the bottom of the cylindrical groove (133); a magnet (136) is embedded inside the push rod (134).

6. The automated sampling device for petrochemical products according to claim 4, characterized in that: The pushing unit includes a hose (18); an air passage (181) is formed at the bottom of the cylindrical groove (133); an air cavity (182) penetrating the sampling box (1) is formed inside the traction rod (15); one end of the hose (18) communicates with the air passage (181), and the other end communicates with the air cavity (182); the steel wire rope (132) is fixedly connected to the inner wall of the hose (18).

7. The automated sampling device for petrochemical products according to claim 6, wherein: The upper end surface of the sampling box (1) is provided with a gas hole (183) communicating with the gas cavity (182); electromagnetic valves (184) are installed in both the gas hole (183) and the gas cavity (182).

8. The automatic sampling device for petrochemical products according to claim 7, wherein: A through groove (19) is provided on one side of the sampling box (1); a rubber glove is fixedly connected in the through groove (19); the sampling box (1) is made of acrylic material.

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