An automatic sampling device for petrochemical products

Abstract

The present invention relates to the technical field of sampling devices, specifically an automatic sampling device for petrochemical products; it comprises a sampling box and a rotor rotatably connected in the sampling box; a sampling belt is wound around the surface of the rotor; the sampling belt is made of PTFE material; one end of the sampling belt is fixedly connected to the rotor; a sampling port is provided on the side wall of the sampling belt; a sealing rod is slidingly sealed in the sampling port; the present invention arranges a sampling belt so that the sampling belt entering the oil tank can synchronously extract oil from oil layers of different heights in the oil tank at one time. On the one hand, the sampler does not need to repeatedly pass through 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 of the sampling belt are independent of each other, so that the oil from the oil layers of different heights will not mix, thereby improving the accuracy of the detected oil data. In addition, compared with traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, in particular to an automatic sampling device for petrochemical products. Background Art

[0002] Petrochemical products refer to various petrochemical products manufactured using petroleum or natural gas as raw materials through a series of chemical processing processes. Petrochemical products can be divided into fuels and oil products (such as refined oil, lubricants, and asphalt), organic chemical raw materials (such as ethylene and propylene), synthetic materials (such as plastics and rubber), and fine chemical products (such as coatings and pharmaceutical intermediates). 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 stratification due to density differences (such as sediment accumulation or water deposition). Therefore, it is necessary to sample the oil layers at different heights in the tank to ensure the accuracy of the oil data.

[0003] Existing samplers can only extract oil samples from a certain depth in the oil tank at a time, resulting in a single sample. If multiple sampling is taken, on the one hand, the sampler will repeatedly pass through the oil layer, causing residual oil on the sampler tube wall to cause contamination of components between adjacent layers, and the sampling efficiency is low. On the other hand, after the previous sampling is completed, oil will remain on the inner wall of the tube. When the oil sample is extracted from a certain depth again, the residual oil will mix with the new sample, resulting in inaccurate oil data.

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

[0005] In order to make up for the shortcomings of the existing technology, the present invention proposes an automatic sampling device for petrochemical products. The present invention sets a sampling belt so that the sampling belt entering the oil tank can synchronously extract oil from oil layers at different heights in the oil tank at one time. On the one hand, the sampler does not need to repeatedly pass through the oil layer, avoiding the problem of residual oil on the wall of the traditional sampler tube contaminating the oil components between adjacent layers. On the other hand, the sampling ports of the sampling belt are independent of each other, so that the oil from the oil layers at different heights will not mix, thereby improving the accuracy of the detected oil 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 described in the present invention comprises a sampling box and a rotating wheel rotatably connected to 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 sealedly connected in the sampling port; a cavity is provided inside the sampling belt; a slider is slidably connected in 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 is connected to the sampling port, and the other end is connected to the cavity; a U-shaped plate is slidably and sealedly connected in 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 sealedly connected in the cylindrical groove; a pushing unit is installed inside the slider; the pushing unit is used to push the push rod to slide in the cylindrical groove;

[0007] The traction unit is installed inside the rotating wheel; the traction unit is used to pull the sliding block upward.

[0008] Preferably, the traction unit includes a traction rod; a cylindrical cavity is provided inside the rotating wheel; the traction rod is rotatably connected in the cylindrical cavity; the end of the traction rod away from the cylindrical cavity is set as a rectangular end; a rocker is provided on the surface of the traction rod; a square groove is provided at the end of the rotating wheel close to the rocker; the rocker is slidably connected in the square groove; and a rectangular groove is provided on the side of the rocker away from the square groove.

[0009] Preferably, a threaded groove is provided at the upper end of the sampling box; a threaded rod is rotatably connected in the threaded groove; and the lower end of the threaded rod is made of fluororubber material.

[0010] Preferably, an electromagnetic sheet is embedded in one end of the sampling belt away from the rotating wheel; and a film layer made of PTFE material is fixedly connected to the surface of the electromagnetic sheet.

[0011] Preferably, the pushing unit includes an electromagnetic plate; the electromagnetic plate is embedded in the bottom of the cylindrical groove; and a magnet is embedded in the pushing rod.

[0012] Preferably, the pushing unit includes a hose; an air channel 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 is connected to the air channel, and the other end is connected to the air cavity; the steel wire rope is fixedly connected to the inner wall of the hose.

[0013] Preferably, an air hole communicating with the air cavity is provided on the upper end surface of the sampling box; and electromagnetic valves are installed in both the air hole and the air cavity.

[0014] Preferably, a through slot is provided on one side of the sampling box; a rubber glove is fixed in the through slot; and the sampling box is made of acrylic material.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention sets a sampling belt so that the sampling belt entering the oil tank can extract oil from oil layers at different heights in the oil tank at one time. On the one hand, the sampler does not need to repeatedly pass through the oil layer, avoiding the problem of residual oil on the tube wall of the traditional sampler contaminating the oil components between adjacent layers. On the other hand, the sampling ports of the sampling belt are independent of each other, so that the oil from the oil layers at different heights will not mix, thereby improving the accuracy of the detected oil data. In addition, compared with traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

[0017] 2. The present invention sets air holes to connect them with the air cavity and the external nitrogen delivery pipeline, so that the external nitrogen delivery pipeline can deliver nitrogen to the sampling box, and then discharge the air in the sampling box. When the sampling belt enters the oil tank or tanker, the sampling belt will only bring the nitrogen in the sampling box into the oil tank or tanker. During the sampling process, it can effectively prevent the oil tank or tanker from entering the air, prevent the oxygen in the air from contacting the oil product, and significantly reduce the risk of fire and explosion. Therefore, the present invention can safely sample gasoline, diesel and other oil tanks or tankers, thereby improving the practical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a three-dimensional diagram of a sampling box equipped with an electromagnetic plate according to the present invention;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0022] Figure 4 It is a partial cross-sectional view of a sampling belt with an airway in the present invention;

[0023] Figure 5 yes Figure 4 Enlarged view of point C in the middle;

[0024] Figure 6 It is a partial cross-sectional view of the sampling box with a hose installed in the present invention;

[0025] Figure 7 yes Figure 6 Enlarged view of point D in the middle;

[0026] In the figure: 1. sampling box; 11. rotating wheel; 111. rocker; 112. square slot; 113. rectangular slot; 12. sampling belt; 121. sampling port; 122. sealing rod; 13. cavity; 131. slider; 132. wire rope; 133. cylindrical slot; 134. pushing rod; 135. electromagnetic plate; 136. magnet; 14. U-shaped slot; 141. U-shaped plate; 15. traction rod; 151. cylindrical cavity; 16. threaded slot; 161. threaded rod; 17. electromagnetic sheet; 171. film layer; 18. hose; 181. air duct; 182. air cavity; 183. air hole; 184. electromagnetic valve; 19. through slot. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] like Figures 1 to 7 As shown, the present invention includes the following embodiments:

[0029] Example 1, an automatic sampling device for petrochemical products, comprising a sampling box 1 and a rotating wheel 11 rotatably connected to the sampling box 1; a sampling belt 12 is wound around 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 provided on the side wall of the sampling belt 12; a sealing rod 122 is slidably and sealedly connected to the sampling port 121; a cavity 13 is provided inside the sampling belt 12; a slider 131 is slidably connected to the cavity 13; the upper end of the slider 131 is fixedly connected to the A steel wire rope 132 is provided; a U-shaped groove 14 is provided inside the sampling belt 12; one end of the U-shaped groove 14 is connected to the sampling port 121, and the other end is connected to the cavity 13; a U-shaped plate 141 is slidably and sealedly 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 provided on the side wall of the slider 131; a push rod 134 is slidably and sealedly connected inside 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 inside the cylindrical groove 133;

[0030] The traction unit is installed inside the rotating wheel 11; the traction unit is used to pull the sliding block 131 upward.

[0031] In this embodiment, the traction unit includes a traction rod 15; a cylindrical cavity 151 is provided inside the rotating wheel 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 provided on the surface of the traction rod 15; a square groove 112 is provided at the end of the rotating wheel 11 close to the rocker 111; the rocker 111 is slidably connected in the square groove 112; a rectangular groove 113 is provided on the side of the rocker 111 away from the square groove 112.

[0032] 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; and the lower end of the threaded rod 161 is made of fluororubber material.

[0033] In this embodiment, an electromagnetic sheet 17 is embedded in one end of the sampling belt 12 away from the rotating wheel 11 ; a thin film layer 171 made of PTFE material is fixedly connected to the surface of the electromagnetic sheet 17 .

[0034] In this embodiment, the pushing unit includes an electromagnetic plate 135 ; the electromagnetic plate 135 is embedded in the bottom of the cylindrical groove 133 ; and a magnet 136 is embedded in the pushing rod 134 .

[0035] When working, the existing sampler can only extract oil samples from a certain depth in the oil tank at a time, resulting in a single sample. If multiple sampling is taken, on the one hand, the sampler will repeatedly pass through the oil layer, causing residual oil on the sampler tube wall to cause contamination of components between adjacent layers, and the sampling efficiency is low. On the other hand, after the previous sampling is completed, oil will remain on the inner wall of the tube. When the oil sample at a certain depth is extracted again, the residual oil will mix with the new sample, resulting in inaccurate oil data.

[0036] To this end, the present invention sets a sampling belt 12 so that the sampling belt 12 entering the oil tank can simultaneously extract oil from oil layers of different heights in the oil tank at one time. On the one hand, the sampler does not need to repeatedly pass through the oil layer, avoiding the problem of residual oil on the wall of the traditional sampler tube 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 from the oil layers of different heights will not mix, thereby improving the accuracy of the detected oil data. In addition, compared with traditional single-point sampling, the sampling efficiency of the present invention is effectively improved.

[0037] In the initial state, a rubber suction cup is installed at the lower end of the sampling box 1, and a placement port is opened at the lower end of the sampling box 1. Petroleum fuel finished oils include gasoline, diesel and kerosene, among which kerosene is not easily oxidized and spontaneously combusted after contact with air due to its relatively low volatility. Therefore, when sampling kerosene finished oils, the present invention only needs to open the tank mouth at the upper end of the oil tank or tanker, and then place the sampling box 1 at the upper end of the oil tank or tanker, so that the tank mouth at the upper end of the oil tank or tanker can penetrate into the placement port 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 tanker through the rubber suction cup at the lower end, so that during the sampling process, the sampling box 1 can be firmly fixed on the upper end of the oil tank or tanker.

[0038] Before sampling, the user first pushes the rocker 111 close to the rotating wheel 11. Since the end of the rocker 111 close to the rotating wheel 11 is set to be a square end that matches the square groove 112, by pushing the rocker 111 close to the rotating wheel 11, the square end of the rocker 111 is inserted into the square groove 112 of the rotating wheel 11, so that the rocker 111 is slidingly connected to the rotating wheel 11. At this time, the user rotates the rocker 111 to make the rocker 111 drive the rotating wheel 11 to rotate, so that the sampling tape 12 wrapped around the surface of the rotating wheel 11 can be released.

[0039] Since the end of the sampling belt 12 equipped with the electromagnetic sheet 17 is located just above the placement port, when the sampling belt 12 is released, the end of the sampling belt 12 equipped with the electromagnetic sheet 17 will fall into the placement port through the guide rod, and because the port of the oil tank or oil tanker is inserted into the placement port, the end of the sampling belt 12 equipped with the electromagnetic sheet 17 will fall into the port of the oil tank or oil tanker, so that the end of the sampling belt 12 equipped with the electromagnetic sheet 17 will be immersed in the kerosene liquid level in the oil tank or oil tanker, and go deep into the bottom of the oil tank or oil tanker until the end of the sampling belt 12 equipped with the electromagnetic sheet 17 contacts the bottom of the oil tank or oil tanker. The electromagnetic sheet 17 is controlled to be energized so that the electromagnetic sheet 17 can generate magnetism and be adsorbed on the bottom of the oil tank or tanker truck, and then the runner 11 is rotated in the opposite direction so that the runner 11 drives the sampling tape 12 to be wound around its surface, so that the sampling tape 12 is pulled by the runner 11 and is in a straight state. At this time, the user only needs to rotate the threaded rod 161 so that the threaded rod 161 spirals into the thread groove 16, so that 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 presses and fixes the runner 11 tightly through the friction between its fluororubber end and the runner 11.

[0040] The electromagnetic sheet 17 will pass through an electric current when in use, and the electric current is likely to cause an explosion in an environment where kerosene vapor exists. Therefore, the present invention wraps a thin film layer 171 on the surface of the electromagnetic sheet 17, and the thin film layer 171 is made of PTFE material, so that the thin film layer 171 made of PTFE material not only has good electrical insulation, but also has the characteristics of chemical corrosion resistance. On the one hand, the thin film layer 171 can isolate the electromagnetic sheet 17 from direct contact with kerosene, and prevent the risk of fire caused by current leakage. On the other hand, the thin film layer 171 made of PTFE material is resistant to kerosene corrosion, which not only improves the service life of the thin film layer 171, but also improves 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.

[0041] Since the sampling belt 12 that penetrates into the oil tank or tank truck is in a taut state, the sampling belt 12 is in a vertical state inside the oil tank or tank truck, and the vertical sampling belt 12 is parallel to the oil layer interface, thereby 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 interface of multiple oil layers, which will not only disrupt the distribution of oil layers, but also cause the oils of different oil layers to mix, 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 mixing of oils of different layers.

[0042] When sampling is required, the user first pulls the rocker 111 so that the square end of the rocker 111 extends out of the square slot 112, so that the rocker 111 can move along the traction rod 15 toward the rectangular end of the traction rod 15 until the rectangular end of the traction rod 15 is inserted into the rectangular slot 113 of the rocker 111, so that the rocker 111 and the traction rod 15 are slidably connected. Then, the rocker 111 is rotated so that the rocker 111 can drive the traction rod 15 to rotate, so that the rotating traction rod 15 can pull the wire rope 132 to be wrapped around its surface, so that the wire rope 132 can pull the slider 131 to rise along the cavity 13 until the slider 131 moves to the U-shaped slot 14, and the electromagnetic plate 135 is energized so that the electromagnetic plate 135 can generate the same magnetic pole as the magnet 136. Due to the principle of like charges repelling each other, the magnet 136 136 is pushed by the magnetic repulsive force to move in the direction away from the cylindrical groove 133, so that the magnet 136 drives the push rod 134 fixed thereto to move synchronously, so that the push rod 134 contacts the U-shaped plate 141 and pushes the U-shaped plate 141 to drive the sealing rod 122 close to the slider 131, so that the space of the sampling port 121 continues to increase. Since the sampling port 121 is located below the kerosene liquid level, the sealing rod 122 is in sliding and 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 sealing rod 122 is pulled backward to generate negative pressure, so that the kerosene will be sucked into the syringe. Since the sealing rod 122 and the inner wall of the sampling port 121 are well sealed, the kerosene sucked into the sampling port 121 will not flow out of the sampling port 121.

[0043] Since there are multiple U-shaped grooves 14 and they are distributed longitudinally along the vertical sampling belt 12, during the rising process of the slider 131, the slider 131 from bottom to top will drive the corresponding sampling ports 121 to open the U-shaped plates 141 in the multiple U-shaped grooves 14 in turn through the push rod 134, thereby realizing the sampling of oil in oil layers of different heights. After the sampling is completed, the user first pushes the traction rod 15 to rotate in the opposite direction through the rocker 111 to release the wire rope 132, so that the slider 131 is reset, and then pushes the rocker 111 to connect with the rotary wheel 11, so that the rocker 111 drives the rotary wheel 11 to rotate in the opposite direction, so that the rotary wheel 11 can pull the sampling belt 12 upward, so that the user can collect and test the sampled samples.

[0044] The difference between Example 2 and Example 1 is that:

[0045] The pushing unit includes a hose 18; an air channel 181 is provided at the bottom of the cylindrical groove 133; an air cavity 182 is provided inside the traction rod 15 and passes through the sampling box 1; one end of the hose 18 is connected to the air channel 181, and the other end is connected to the air cavity 182; the steel wire rope 132 is fixedly connected to the inner wall of the hose 18.

[0046] In this embodiment, an air hole 183 communicating with the air cavity 182 is formed on the upper end surface of the sampling box 1 ; and electromagnetic valves 184 are installed in both the air hole 183 and the air cavity 182 .

[0047] In this embodiment, a through slot 19 is provided on one side of the sampling box 1; a rubber glove is fixedly connected to the through slot 19; and the sampling box 1 is made of acrylic material.

[0048] During operation, refined oils such as gasoline and diesel are flammable and explosive. Therefore, during the sampling process, it is necessary to pay attention to the oxygen in the air entering the oil tank to prevent the oxygen in the air from mixing with the oil, reduce the risk of fire and explosion, and ensure the safety of the oil tank and the surrounding area. To this end, the present invention sets an air hole 183 to connect it to the air cavity 182 and the external nitrogen delivery pipeline, so that the external nitrogen delivery pipeline can deliver nitrogen to the sampling box 1, and then discharge the air in the sampling box 1. When the sampling belt 12 enters the oil tank or tanker, the sampling belt 12 will only bring the nitrogen in the sampling box 1 into the oil tank or tanker. During the sampling process, it can effectively prevent the oil tank or tanker from entering the air, prevent the oxygen in the air from contacting the oil product, and significantly reduce the risk of fire and explosion, so that the present invention can safely sample oil tanks or tankers such as gasoline and diesel, thereby improving the practical scope of the present invention.

[0049] During use, the user first controls the solenoid valve 184 in the air hole 183 to open, and the solenoid valve 184 in the airway 181 to close, and controls the external nitrogen delivery pipeline 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, the nitrogen will slowly diffuse upward. Therefore, by setting the air hole 183 to be located on the upper end surface of the sampling box 1, the nitrogen is transported 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 downward, so that 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, thereby achieving a better nitrogen replacement effect.

[0050] After the air is exhausted, the user places the sampling box 1 on the upper end of the oil tank or tanker truck 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 his hand into the through slot 19 and wears the rubber gloves fixed in the through slot 19 so that the user can remove the end cap inserted into the sampling box 1 through the rubber gloves. Since the sampling box 1 is filled with nitrogen, the end cap is removed from the sampling box 1 to prevent the outside air from entering through the port of the oil tank or tanker truck, further preventing the oxygen in the air from coming into contact with the oil product, significantly reducing the risk of fire and explosion. Then, use The user rotates the wheel 11, so that the sampling tape 12 wrapped around the wheel 11 is released and falls into the port of the oil tank or 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 uses rubber gloves to twist the end cover, the user can directly observe the internal end cover through the transparent sampling box 1, thereby facilitating the user to remove the end cover. Moreover, the sampling box 1 made of acrylic material can also resist the corrosion of refined oil, so that the service life of the sampling box 1 is effectively improved.

[0051] When the sampling tape 12 is straightened, the user pulls the rocker 111 to connect with the traction rod 15, and by rotating the rocker 111, the rocker 111 can drive the traction rod 15 to rotate, so that the rotating traction rod 15 can pull the wire rope 132 and the hose 18 to be wound around the traction rod 15. Since the wire rope 132 is fixed to the inner wall of the hose 18, the wire rope 132 not only increases the structural strength of the hose 18, but also supports the inner wall of the hose 18, thereby preventing the hose 18 wound on the traction rod 15 from being flattened due to extrusion deformation, so that the hose 18 wound on the traction 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 cavity 182 is controlled to open, and the solenoid valve 184 in the air hole 183 is closed, so that the nitrogen transported by the nitrogen delivery pipeline directly enters the air cavity 182, so that the nitrogen entering the air cavity 182 can enter the cylindrical groove 133 through the hose 18 and the air channel 181. The push rod 134 in the cylindrical groove 133 is pushed by the nitrogen and extends out of the cylindrical groove 133, so that the push rod 134 extending out of the cylindrical groove 133 can push the U-shaped plate 141 to drive the sealing rod 122 close to the slider 131, so that the sampling port 121 is opened, and the oil 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 used in the present invention will not generate a second magnetic field in the oil tank or tanker, so as to prevent the electromagnetic plate 135 from being too close to the electromagnetic sheet 17, causing magnetic interference between the electromagnetic plate 135 and the electromagnetic sheet 17, or even causing the magnetic fields of the two to superimpose or cancel each other, thereby affecting their respective working states. Therefore, using nitrogen as a driving source can not only ensure the stable adsorption effect of the electromagnetic sheet 17 on the bottom of the oil tank or tanker, but also ensure that the sealing rod 122 is stably pushed out of the cylindrical groove 133, thereby further improving the practical application effect of the present invention.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic sampling device for petrochemical products, characterized by: The invention comprises a sampling box (1) and a rotating wheel (11) rotatably connected to the sampling box (1); a sampling belt (12) is wound around 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 provided on the side wall of the sampling belt (12); a sealing rod (122) is slidably and sealedly connected to the sampling port (121); a cavity (13) is provided inside the sampling belt (12); a slider (131) is slidably connected to 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 provided inside the sampling belt (12); one end of the U-shaped groove (14) is communicated with the sampling port (121), and the other end is communicated with the cavity (13); a U-shaped plate (141) is connected in a sliding and sealing manner inside the U-shaped groove (14); the U-shaped plate (141) is fixedly connected to the sealing rod (122); a cylindrical groove (133) is provided on the side wall of the slider (131); a push rod (134) is connected in a sliding and sealing manner inside 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 is installed inside the rotating wheel (11); the traction unit is used to pull the sliding block (131) upward.

2. The petrochemical product automatic sampling device according to claim 1, characterized in that: The traction unit comprises a traction rod (15); a cylindrical cavity (151) is provided inside the rotating wheel (11); the traction rod (15) is rotatably connected in the cylindrical cavity (151); an 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 provided at one end of the rotating wheel (11) close to the rocker (111); the rocker (111) is slidably connected in the square groove (112); and a rectangular groove (113) is provided on the side of the rocker (111) away from the square groove (112).

3. The petrochemical product automatic sampling device according to claim 2, characterized in that: The upper end of the sampling box (1) is provided with a threaded groove (16); 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, characterized in that: An electromagnetic sheet (17) is embedded at one end of the sampling belt (12) away from the rotating wheel (11); a film layer (171) made of PTFE material is fixedly connected to the surface of the electromagnetic sheet (17).

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

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

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

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

Images