Automatic cut-off closed sampler

Abstract

The present invention discloses an automatic cut-off type closed sampler, in the technical field of samplers, comprising a sampling barrel; a sampling mechanism, wherein the sampling mechanism comprises a mounting block slidably connected to the inner wall of the sampling barrel, the lower end of the mounting block penetrates the lower end of the sampling barrel and is fixedly connected with a sampling head, the side wall of the sampling barrel is symmetrically and fixedly connected with two sampling boxes, the inner walls of the two sampling boxes are both sealed and slidably connected with a sliding plug, the sliding plug divides the interior of the sampling box into two parts, a sampling cavity and a pump air cavity, the sampling cavity is connected to the sampling head through a one-way sampling tube, the one-way sampling tube is made of a hose, and the inner wall of the sampling cavity is fixedly connected with a one-way sample outlet tube. In the present invention, the sampling head is inserted into a container containing a cleaning liquid, and then the motor is driven to rotate in the opposite direction, which will extract the cleaning liquid, thereby preventing the residual petroleum sample from contaminating the next sampling sample, causing inaccurate sampling analysis results.

Description

Technical Field

[0001] The invention relates to the technical field of samplers, and in particular to an automatic cut-off sealed sampler. Background Art

[0002] The closed sampler is used for sampling and analysis of petroleum samples in petrochemical plants, and the authenticity of the sample collection must be guaranteed.

[0003] After the existing closed sampler samples the oil, there will be oil samples remaining in the sampler. When the next sample is taken, the residual sample from the previous sampling will contaminate the current sample, resulting in inaccurate sampling and analysis results. In addition, when the sampler samples the oil, sampling is more difficult because the oil has a high viscosity and poor fluidity.

[0004] Based on this, we propose an automatic cut-off closed sampler. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an automatic cut-off closed sampler.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatic cut-off closed sampler comprises a sampling tube;

[0008] A sampling mechanism, the sampling mechanism comprises a mounting block slidably connected to the inner wall of the sampling barrel, the lower end of the mounting block penetrates the lower end of the sampling barrel and is fixedly connected with a sampling head, the side wall of the sampling barrel is symmetrically and fixedly connected with two sampling boxes, the inner walls of the two sampling boxes are both sealed and slidably connected with sliding plugs, the sliding plug divides the interior of the sampling box into two parts, a sampling cavity and a pump air cavity, the sampling cavity is connected with the sampling head through a one-way sampling tube, the one-way sampling tube is made of a hose, the inner wall of the sampling cavity is fixedly connected with a one-way sampling tube, the other end of the one-way sampling tube penetrates the side wall of the sampling box and is fixedly connected with the sampling head, and the lower end of the sampling box is fixedly connected with a placement table;

[0009] The cleaning mechanism comprises a rotating shaft rotatably connected to the inner wall of the sampling cavity, a cleaning roller is fixedly connected to the side wall of the rotating shaft, and a plurality of bristles are fixedly connected to the side wall of the cleaning roller.

[0010] Preferably, the sampling mechanism also includes a slider slidably connected to the inner wall of the sampling barrel, the lower end of the slider is symmetrically rotatably connected to two connecting rods, the side wall of the sliding plug is fixedly connected to a push rod, one end of the push rod extends into the sampling barrel and is rotatably connected to the lower end of the connecting rod, the top of the sampling barrel is rotatably connected to a reciprocating screw, the side wall of the reciprocating screw is threadedly connected to the slider, the upper end of the sampling barrel is fixedly connected to a motor, and the output end of the motor passes through the upper end of the sampling barrel and is fixedly connected to the reciprocating screw.

[0011] A lead screw is fixedly connected to the lower end of the reciprocating lead screw, and a side wall of the lead screw is threadedly connected to the mounting block.

[0012] Preferably, the cleaning mechanism also includes a first air inlet cavity provided in the cleaning roller, a plurality of jet holes are provided on the inner wall of the first air inlet cavity, a one-way valve is installed on the inner wall of the jet hole, a transverse groove is provided in the rotating shaft, the transverse groove is connected with the first air inlet cavity through a connecting groove, the side wall of the sampling box is fixedly connected with a rotating joint through a bracket, one end of the rotating shaft passes through the side wall of the sampling box and is fixedly connected with the rotating joint, a one-way air inlet pipe is fixedly connected with the inner wall of the pump air cavity, a one-way air supply pipe is fixedly connected with the inner wall of the pump air cavity, and the other end of the one-way air supply pipe is fixedly connected with the rotating joint.

[0013] Preferably, an extrusion mechanism is installed on the sampling barrel, and the extrusion mechanism includes a circular ring plate fixedly connected to the side wall of the sampling barrel, two slide grooves are symmetrically provided on the upper end of the circular ring plate, and two moving blocks are symmetrically slidably connected to the inner walls of the two slide grooves, and the upper ends of the two moving blocks are fixedly connected to a mounting plate, and the side walls of the two mounting plates close to each other are fixedly connected to multiple extrusion heads, the multiple extrusion heads are staggered and arranged, and the multiple extrusion heads are made of materials with good thermal conductivity.

[0014] Preferably, the extrusion mechanism also includes a second air inlet cavity opened in the mounting plate, and a third air inlet cavity is opened in each of the plurality of extrusion heads. The second air inlet cavity is connected with the third air inlet cavity through a connecting hole, an air leakage hole is opened on the inner wall of the third air inlet cavity, a pressure relief valve is installed on the inner wall of the air leakage hole, and the pump air cavity is connected with the second air inlet cavity through a one-way air outlet pipe.

[0015] Preferably, a driving mechanism is installed in the pump air cavity, and the driving mechanism includes a first rotating rod rotatably connected to the inner wall of the pump air cavity, a gear is fixedly connected to the side wall of the first rotating rod, a rack is fixedly connected to the upper end of the push rod, the gear and the rack are meshingly connected, one end of the first rotating rod passes through the side wall of the sampling box and is fixedly connected to a driving wheel, a driven wheel is fixedly connected to the side wall of the rotating shaft, and the driving wheel is connected to the driven wheel through a synchronous belt.

[0016] Preferably, the driving mechanism also includes a bidirectional screw rotatably connected to the inner wall of the slide groove, the side wall of the bidirectional screw is threadedly connected to the two moving blocks, the side wall of the bidirectional screw is fixedly connected to the first bevel gear, the side wall of the sampling box is fixedly connected to the cross plate, the lower end of the cross plate is rotatably connected to the second rotating rod, the lower end of the second rotating rod is fixedly connected to the second bevel gear, the first bevel gear is meshingly connected to the second bevel gear, the side wall of the first rotating rod is fixedly connected to the third bevel gear, the upper end of the second rotating rod passes through the upper end of the cross plate and is fixedly connected to the fourth bevel gear, and the third bevel gear is meshingly connected to the fourth bevel gear.

[0017] The present invention has the following beneficial effects:

[0018] 1. By setting up a cleaning mechanism, insert the sampling head into a container containing cleaning liquid, and then drive the motor to rotate in the opposite direction to extract the cleaning liquid, thereby preventing the residual petroleum sample from contaminating the next sampling sample and causing inaccurate sampling analysis results;

[0019] 2. During the cleaning process, the cleaning roller will rotate, driving multiple bristles to rotate, and then the bristles will cooperate with the cleaning liquid to clean the inner wall of the sampling cavity and the side wall of the sliding plug, further improving the cleaning effect;

[0020] 3. As the cleaning progresses, the mounting block will move upward, driving the sampling head to move upward. When the sampling head leaves the cleaning liquid surface, the sampling head will extract air, and the airflow will flow inside. At this time, the cleaning liquid remaining in the sampling head, one-way sampling tube, sampling cavity, one-way sampling tube and sampling head will be taken out together with the airflow, thereby avoiding the cleaning liquid residue and contaminating the next sampling sample;

[0021] 4. When cleaning the residual cleaning liquid, hot air will be pumped into the third air inlet cavity simultaneously to heat the extrusion head, thereby heating the air in the one-way sampling tube. The hot air will heat the residual cleaning liquid, making it easier for the cleaning liquid to evaporate and be discharged with the air flow. The hot air will also be sprayed into the sampling cavity through multiple jet holes simultaneously, further heating the inside of the sampling cavity, making it easier for the residual cleaning liquid to evaporate and be discharged, thereby improving the cleaning effect of the residual cleaning liquid.

[0022] 5. By setting up a sampling mechanism, the driving motor rotates forward, driving the reciprocating screw to rotate, and synchronously driving the screw to rotate forward. At this time, the mounting block will slide downward, driving the sampling head to move downward. When the sampling head moves downward to contact the oil in the oil storage tank, it will start to extract the oil, and the rotation of the reciprocating screw will drive the slider to slide up and down, thereby driving the connecting rod to move up and down, and rotate. The connecting rod will drive the push rod to slide back and forth left and right, thereby driving the sliding plug to slide back and forth, so that a suction force is generated in the sampling cavity. The oil in the oil storage pipe will be extracted through the sampling head, and then the oil will enter the sampling cavity through the one-way sampling tube, and then the oil will enter the sampling head through the one-way sampling tube, and then the oil will flow out through the sampling head and flow into the sample bottle for collection, so as to carry out sampling analysis;

[0023] 6. During the sampling process, as the sampling proceeds, the oil level in the oil storage tank will drop, and the sampling head will also drop synchronously, so that the sampling head is always kept below the oil level, thereby ensuring the sampling process. When the mounting block moves to the bottom, the sampling head stops descending, and the sampling head will be out of contact with the oil, thereby automatically stopping sampling;

[0024] 7. During the reciprocating seal sliding process of the sliding plug, the external hot air will enter the pump air cavity through the one-way air inlet pipe, and then the hot air will enter the second air inlet cavity through the one-way air outlet pipe, and then the hot air will enter the third air inlet cavity through the connecting hole. The hot air will heat the extrusion head, so that the temperature of the extrusion head increases, and then the extrusion head will simultaneously heat the oil in the one-way sampling tube, so that its temperature increases, thereby further increasing the fluidity of the oil and facilitating the oil flow sampling;

[0025] 8. The rotation of the first rotating rod will synchronously drive the driving wheel to rotate, and then drive the driven wheel to rotate, drive the rotating shaft to rotate, drive the cleaning roller to rotate, and then drive the multiple bristles to rotate, stirring the oil in the sampling chamber, thereby improving the fluidity of the oil and facilitating sampling. In addition, the hot air in the pump air chamber will enter the horizontal groove through the one-way air supply pipe, and then the hot air will enter the first air inlet chamber through the connecting groove, and then the hot air will be ejected through multiple jet holes and sprayed into the oil in the sampling chamber, further heating the oil, thereby further enhancing the fluidity of the oil and improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of an automatic cut-off sealed sampler proposed by the present invention;

[0027] Figure 2 for Figure 1 A top view of the structure in FIG.

[0028] Figure 3 for Figure 1 A schematic cross-sectional view of the structure;

[0029] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the sampling box;

[0030] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of the middle ring plate;

[0031] Figure 6 for Figure 3 A schematic diagram of the structure enlargement at point A;

[0032] Figure 7 for Figure 3 Schematic diagram of the enlarged structure at point B in FIG.

[0033] In the figure: 1, sampling tube; 2, mounting block; 3, sampling head; 4, sampling box; 5, sliding plug; 501, sampling cavity; 502, pump air cavity; 6, one-way sampling tube; 7, one-way sample tube; 8, sample head; 9, placing table; 10, slider; 11, connecting rod; 12, push rod; 13, reciprocating screw; 14, motor; 15, screw; 16, rotating shaft; 17, cleaning roller; 18, brush; 19, first air inlet cavity; 20, air jet hole; 21, transverse groove; 22, connecting groove; 23, rotary joint; 24, one-way air inlet Tube; 25, one-way air supply pipe; 26, slide groove; 27, moving block; 28, mounting plate; 29, extrusion head; 30, second air inlet chamber; 31, third air inlet chamber; 32, connecting hole; 33, air leakage hole; 34, one-way air outlet pipe; 35, first rotating rod; 36, gear; 37, rack; 38, driving wheel; 39, driven wheel; 40, two-way lead screw; 41, first bevel gear; 42, cross plate; 43, second rotating rod; 44, second bevel gear; 45, third bevel gear; 46, fourth bevel gear; 47, circular ring plate. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0035] Reference Figure 1-Figure 7 , an automatic cut-off closed sampler, comprising a sampling tube 1;

[0036] The sampling mechanism comprises a mounting block 2 which is slidably connected to the inner wall of the sampling barrel 1, the lower end of the mounting block 2 penetrates the lower end of the sampling barrel 1 and is fixedly connected with a sampling head 3, two sampling boxes 4 are symmetrically and fixedly connected to the side wall of the sampling barrel 1, the inner walls of the two sampling boxes 4 are both sealed and slidably connected with a sliding plug 5, the sliding plug 5 divides the interior of the sampling box 4 into two parts, a sampling cavity 501 and a pump air cavity 502, the sampling cavity 501 is connected with the sampling head 3 through a one-way sampling tube 6, the one-way sampling tube 6 is made of a hose, the one-way sampling tube 6 only allows the oil in the sampling head 3 to enter the sampling cavity 501, the inner wall of the sampling cavity 501 is fixedly connected with a one-way sample outlet tube 7, the other end of the one-way sample outlet tube 7 penetrates the side wall of the sampling box 4 and is fixedly connected with a sample outlet head 8, the one-way sample outlet tube 7 only allows the oil in the sampling cavity 501 to be discharged, and the lower end of the sampling box 4 is fixedly connected with a placing table 9;

[0037] Furthermore, when sampling, the sampling head 3 is inserted into the external oil storage tank. During the sampling process, as the sampling proceeds, the oil level in the oil storage tank will drop, and the sampling head 3 will also drop synchronously, so that the sampling head 3 is always kept below the oil level, thereby ensuring the sampling. When the mounting block 2 moves to the lowermost end, the sampling head 3 stops descending, and the sampling head 3 will lose contact with the oil, thereby automatically stopping sampling.

[0038] The cleaning mechanism includes a rotating shaft 16 rotatably connected to the inner wall of the sampling chamber 501 , a cleaning roller 17 is fixedly connected to the side wall of the rotating shaft 16 , and a plurality of bristles 18 are fixedly connected to the side wall of the cleaning roller 17 .

[0039] The sampling mechanism also includes a slider 10 slidably connected to the inner wall of the sampling tube 1, and the lower end of the slider 10 is symmetrically rotatably connected to two connecting rods 11, and the side wall of the sliding plug 5 is fixedly connected to a push rod 12, one end of the push rod 12 extends into the sampling tube 1 and is rotatably connected to the lower end of the connecting rod 11, and a reciprocating screw 13 is rotatably connected to the top of the sampling tube 1, and the side wall of the reciprocating screw 13 is threadedly connected to the slider 10, and a motor 14 is fixedly connected to the upper end of the sampling tube 1, and the output end of the motor 14 passes through the upper end of the sampling tube 1 and is fixedly connected to the reciprocating screw 13.

[0040] A lead screw 15 is fixedly connected to the lower end of the reciprocating lead screw 13 , and a side wall of the lead screw is threadedly connected to the mounting block 2 .

[0041] Furthermore, the driving motor 14 rotates forward, driving the reciprocating screw 13 to rotate, and synchronously driving the screw 15 to rotate forward. At this time, the mounting block 2 will slide downward, driving the sampling head 3 to move downward. When the sampling head 3 moves downward to contact the oil in the oil storage tank, it will start to extract the oil, and the rotation of the reciprocating screw 13 will drive the slider 10 to slide back and forth, thereby driving the connecting rod 11 to move up and down and rotate. The connecting rod 11 will drive the push rod 12 to slide back and forth left and right, thereby driving the sliding plug 5 to slide back and forth in a sealed manner, so that a suction force is generated in the sampling cavity 501, and the oil in the oil storage pipe will be extracted through the sampling head 3, and then the oil will enter the sampling cavity 501 through the one-way sampling tube 6, and then the oil will enter the sampling head 8 through the one-way sample outlet tube 7, and then the oil will flow out through the sample outlet head 8, and the sample bottle will be placed on the placement table 9, and the oil in the sample outlet head 8 will flow into the sample bottle for collection, so as to perform sampling and analysis.

[0042] It is worth mentioning that the sampling head 3 is inserted into the container containing the cleaning liquid, and the sampling head 3 is located at the lowest point of the container, and then the driving motor 14 is rotated in the opposite direction to drive the sliding plug 5 to slide back and forth. At this time, the cleaning liquid will be drawn into the one-way sampling tube 6 through the sampling head 3, and then the cleaning liquid will enter the sampling cavity 501, and finally the cleaning liquid will be discharged through the one-way sample outlet tube 7. When the cleaning liquid flows, the residual petroleum sample in the sampling head 3, the one-way sampling tube 6, the sampling cavity 501, the one-way sample outlet tube 7 and the sampling head 8 will be cleaned, thereby avoiding the residual petroleum sample from contaminating the next sampling sample, resulting in inaccurate sampling analysis results. In addition, during the cleaning process, the cleaning roller 17 will rotate, driving the multiple bristles 18 to rotate, and then the bristles 18 will cooperate with the cleaning liquid to clean the inner wall of the sampling cavity 501 and the side wall of the sliding plug 5, further improving the cleaning effect.

[0043] It is worth mentioning that as the cleaning proceeds, the mounting block 2 will move upward, driving the sampling head 3 to move upward. When the sampling head 3 leaves the cleaning liquid surface, the sampling head 3 will draw air, and the airflow will flow inside. At this time, the cleaning liquid remaining in the sampling head 3, the one-way sampling tube 6, the sampling cavity 501, the one-way sampling tube 7 and the sampling head 8 will be brought out together with the airflow, thereby avoiding the residual cleaning liquid and contaminating the next sampling sample.

[0044] The cleaning mechanism also includes a first air inlet cavity 19 provided in the cleaning roller 17, a plurality of air jet holes 20 are provided on the inner wall of the first air inlet cavity 19, a one-way valve is installed on the inner wall of the air jet hole 20, and the one-way valve only allows the air in the first air inlet cavity 19 to be discharged through the air jet hole 20, a transverse groove 21 is provided in the rotating shaft 16, and the transverse groove 21 is connected to the first air inlet cavity 19 through a connecting groove 22, a rotating joint 23 is fixedly connected to the side wall of the sampling box 4 through a bracket, and one end of the rotating shaft 16 passes through the sampling The side wall of the box 4 is fixedly connected to the rotary joint 23, and the inner wall of the pump air cavity 502 is fixedly connected with a one-way air inlet pipe 24. The other end of the one-way air inlet pipe 24 is connected to an external device storing hot air, and the one-way air inlet pipe 24 only allows external hot air to enter the pump air cavity 502. The inner wall of the pump air cavity 502 is fixedly connected with a one-way air supply pipe 25. The other end of the one-way air supply pipe 25 is fixedly connected to the rotary joint 23, and the one-way air supply pipe 25 only allows the hot air in the pump air cavity 502 to be discharged.

[0045] An extrusion mechanism is installed on the sampling tube 1, and the extrusion mechanism includes a circular plate 47 fixedly connected to the side wall of the sampling tube 1, and two slide grooves 26 are symmetrically opened on the upper end of the circular plate 47. The inner walls of the two slide grooves 26 are symmetrically slidably connected to two moving blocks 27, and the upper ends of the two moving blocks 27 are fixedly connected to mounting plates 28. The side walls of the two mounting plates 28 close to each other are fixedly connected to multiple extrusion heads 29. The multiple extrusion heads 29 are staggered and made of materials with good thermal conductivity.

[0046] The extrusion mechanism also includes a second air inlet cavity 30 opened in the mounting plate 28, and a third air inlet cavity 31 is opened in each of the multiple extrusion heads 29. The second air inlet cavity 30 is connected with the third air inlet cavity 31 through a connecting hole 32. An air leakage hole 33 is opened on the inner wall of the third air inlet cavity 31. A pressure relief valve is installed on the inner wall of the air leakage hole 33. The pump air cavity 502 is connected with the second air inlet cavity 30 through a one-way air outlet pipe 34. The one-way air outlet pipe 34 only allows the hot air in the pump air cavity 502 to enter the second air inlet cavity 30.

[0047] Furthermore, during the reciprocating sealed sliding of the sliding plug 5, the external hot air will enter the pump air chamber 502 through the one-way air inlet pipe 24, and then the hot air will enter the second air inlet chamber 30 through the one-way air outlet pipe 34, and then the hot air will enter the third air inlet chamber 31 through the connecting hole 32. The hot air will heat the extrusion head 29, so that the temperature of the extrusion head 29 increases, and then the extrusion head 29 will simultaneously heat the oil in the one-way sampling tube 6 to increase its temperature, thereby further increasing the fluidity of the oil and facilitating the oil flow sampling.

[0048] It is worth mentioning that when cleaning the residual cleaning liquid, hot air will be simultaneously pumped into the third air inlet chamber 31 to heat the extrusion head 29, thereby heating the air in the one-way sampling tube 6. The hot air will heat the residual cleaning liquid, making it easier for the cleaning liquid to evaporate and be discharged with the airflow. The hot air will also be simultaneously sprayed into the sampling chamber 501 through multiple jet holes 20, further heating the inside of the sampling chamber 501, making it easier for the residual cleaning liquid to evaporate and discharge, thereby improving the cleaning effect of the residual cleaning liquid.

[0049] It is worth mentioning that when the one-way sampling tube 6 is cleaned with residual cleaning liquid, scale may be generated in the one-way sampling tube 6 due to repeated cooling and heating, and the scale will contaminate the petroleum sample. The scale will also narrow the inner diameter of the one-way sampling tube 6, affecting the sampling. Therefore, when the extrusion head 29 repeatedly squeezes the one-way sampling tube 6, the one-way sampling tube 6 is deformed, and the scale attached to its inner wall will fall off, which plays a certain role in removing scale.

[0050] A driving mechanism is installed in the pump air cavity 502, and the driving mechanism includes a first rotating rod 35 rotatably connected to the inner wall of the pump air cavity 502, a gear 36 is fixedly connected to the side wall of the first rotating rod 35, a rack 37 is fixedly connected to the upper end of the push rod 12, the gear 36 is meshingly connected to the rack 37, one end of the first rotating rod 35 passes through the side wall of the sampling box 4 and is fixedly connected to a driving wheel 38, a driven wheel 39 is fixedly connected to the side wall of the rotating shaft 16, and the driving wheel 38 is connected to the driven wheel 39 through a synchronous belt.

[0051] Furthermore, the rotation of the first rotating rod 35 will synchronously drive the driving wheel 38 to rotate, and then drive the driven wheel 39 to rotate, drive the rotating shaft 16 to rotate, drive the cleaning roller 17 to rotate, and then drive the multiple bristles 18 to rotate, stirring the oil in the sampling chamber 501, thereby improving the fluidity of the oil and facilitating sampling, and the hot air in the pump air chamber 502 will enter the transverse groove 21 through the one-way air supply pipe 25, and then the hot air will enter the first air inlet chamber 19 through the connecting groove 22, and then the hot air will be ejected through the multiple jet holes 20 and sprayed into the oil in the sampling chamber 501, further heating the oil, thereby further enhancing the fluidity of the oil and improving the sampling efficiency.

[0052] The driving mechanism also includes a bidirectional screw 40 rotatably connected to the inner wall of the slide groove 26, the side wall of the bidirectional screw 40 is threadedly connected to the two moving blocks 27, the side wall of the bidirectional screw 40 is fixedly connected to the first bevel gear 41, the side wall of the sampling box 4 is fixedly connected to the cross plate 42, the lower end of the cross plate 42 is rotatably connected to the second rotating rod 43, the lower end of the second rotating rod 43 is fixedly connected to the second bevel gear 44, the first bevel gear 41 is meshingly connected with the second bevel gear 44, the side wall of the first rotating rod 35 is fixedly connected to the third bevel gear 45, the upper end of the second rotating rod 43 passes through the upper end of the cross plate 42 and is fixedly connected to the fourth bevel gear 46, and the third bevel gear 45 is meshingly connected with the fourth bevel gear 46.

[0053] Furthermore, during the reciprocating sliding process of the push rod 12, the rack 37 will be synchronously driven to move back and forth, driving the gear 36 to rotate forward and reversely, and then driving the first rotating rod 35 to rotate forward and reversely, driving the third bevel gear 45 to rotate forward and reversely, driving the fourth bevel gear 46 to rotate forward and reversely, driving the second rotating rod 43 to rotate forward and reversely, thereby driving the second bevel gear 44 to rotate forward and reversely, driving the first bevel gear 41 to rotate forward and reversely, and driving the bidirectional lead screw 40 to rotate forward and reversely, thereby driving the two moving blocks 27 to move closer to and away from each other, driving the two mounting plates 28 to move closer to and away from each other, and driving the multiple extrusion heads 29 to move closer to or away from each other, squeezing the one-way sampling tube 6, and then squeezing the petroleum inside the one-way sampling tube 6, increasing its fluidity, and facilitating sampling.

[0054] In the present invention, when sampling, first place the sample bottle on the placement table 9, then insert the sampling head 3 into the oil storage tank, then the annular plate 47 abuts against the upper end of the oil storage tank, so that the entire device is stabilized on the oil storage tank, and then the driving motor 14 rotates forward, driving the reciprocating screw 13 to rotate, and synchronously driving the screw 15 to rotate forward, at this time the mounting block 2 will slide downward, driving the sampling head 3 to move downward, when the sampling head 3 moves downward to contact the oil in the oil storage tank, it will start to extract the oil, and the rotation of the reciprocating screw 13 will drive The slider 10 slides up and down reciprocatingly, thereby driving the connecting rod 11 to move up and down and rotate. The connecting rod 11 will drive the push rod 12 to slide left and right reciprocatingly, thereby driving the sliding plug 5 to slide back and forth in a sealed manner, so that a suction force is generated in the sampling cavity 501, and the oil in the oil storage pipe will be extracted through the sampling head 3, and then the oil will enter the sampling cavity 501 through the one-way sampling tube 6, and then the oil will enter the sampling head 8 through the one-way sampling tube 7, and then the oil will flow out through the sampling head 8 and flow into the sample bottle for collection, so as to perform sampling analysis.

[0055] During the reciprocating sliding process of the push rod 12, the rack 37 will be synchronously driven to move back and forth, driving the gear 36 to rotate forward and reversely, and then driving the first rotating rod 35 to rotate forward and reversely, driving the third bevel gear 45 to rotate forward and reversely, driving the fourth bevel gear 46 to rotate forward and reversely, driving the second rotating rod 43 to rotate forward and reversely, thereby driving the second bevel gear 44 to rotate forward and reversely, driving the first bevel gear 41 to rotate forward and reversely, and driving the bidirectional lead screw 40 to rotate forward and reversely, thereby driving the two moving blocks 27 to move closer to and away from each other, driving the two mounting plates 28 to move closer to and away from each other, and driving the multiple extrusion heads 29 to move closer to or away from each other, squeezing the one-way sampling tube 6, and then squeezing the oil inside the one-way sampling tube 6, increasing its fluidity, and facilitating sampling.

[0056] During the reciprocating sealed sliding of the sliding plug 5, the external hot air will enter the pump air chamber 502 through the one-way air inlet pipe 24, and then the hot air will enter the second air inlet chamber 30 through the one-way air outlet pipe 34, and then the hot air will enter the third air inlet chamber 31 through the connecting hole 32. The hot air will heat the extrusion head 29, so that the temperature of the extrusion head 29 increases, and then the extrusion head 29 will simultaneously heat the oil in the one-way sampling tube 6 to increase its temperature, thereby further increasing the fluidity of the oil and facilitating the oil flow sampling.

[0057] In addition, the rotation of the first rotating rod 35 will synchronously drive the driving wheel 38 to rotate, and then drive the driven wheel 39 to rotate, drive the rotating shaft 16 to rotate, drive the cleaning roller 17 to rotate, and then drive the multiple bristles 18 to rotate, stirring the oil in the sampling chamber 501, thereby improving the fluidity of the oil and facilitating sampling, and the hot air in the pump air chamber 502 will enter the transverse groove 21 through the one-way air supply pipe 25, and then the hot air will enter the first air inlet chamber 19 through the connecting groove 22, and then the hot air will be ejected through the multiple jet holes 20 and sprayed into the oil in the sampling chamber 501, further heating the oil, thereby further enhancing the fluidity of the oil and improving the sampling efficiency.

[0058] During the sampling process, as the sampling proceeds, the oil level in the oil storage tank will drop, and the sampling head 3 will also drop synchronously, so that the sampling head 3 is always kept below the oil level, thereby ensuring the sampling process. When the mounting block 2 moves to the lower end, the sampling head 3 stops descending, and the sampling head 3 will lose contact with the oil, thereby automatically stopping sampling.

[0059] After sampling, the sampling head 3 is inserted into the container containing the cleaning liquid, and the sampling head 3 is located at the lowest point of the container. The motor 14 is then driven to rotate in the opposite direction to drive the sliding plug 5 to slide back and forth. At this time, the cleaning liquid will be drawn into the one-way sampling tube 6 through the sampling head 3, and then the cleaning liquid will enter the sampling cavity 501. Finally, the cleaning liquid will be discharged through the one-way sample outlet tube 7. When the cleaning liquid flows, the residual petroleum sample in the sampling head 3, the one-way sampling tube 6, the sampling cavity 501, the one-way sample outlet tube 7 and the sample outlet head 8 will be cleaned, thereby preventing the residual petroleum sample from contaminating the next sampling sample, resulting in inaccurate sampling analysis results.

[0060] In addition, during the cleaning process, the cleaning roller 17 will rotate, driving the multiple bristles 18 to rotate, and then the bristles 18 will cooperate with the cleaning liquid to clean the inner wall of the sampling cavity 501 and the side wall of the sliding plug 5, further improving the cleaning effect.

[0061] As the cleaning proceeds, the mounting block 2 will move upward, driving the sampling head 3 to move upward. When the sampling head 3 leaves the cleaning liquid surface, the sampling head 3 will draw air, and the airflow will flow inside. At this time, the cleaning liquid remaining in the sampling head 3, the one-way sampling tube 6, the sampling cavity 501, the one-way sampling tube 7 and the sampling head 8 will be brought out together with the airflow, thereby avoiding the residual cleaning liquid and contaminating the next sampling sample.

[0062] And when cleaning the residual cleaning liquid, the hot air will be simultaneously pumped into the third air inlet chamber 31 to heat the extrusion head 29, thereby heating the air in the one-way sampling tube 6. The hot air will heat the residual cleaning liquid, making it easier for the cleaning liquid to evaporate and be discharged with the airflow. The hot air will also be simultaneously sprayed into the sampling chamber 501 through multiple jet holes 20, further heating the inside of the sampling chamber 501, making it easier for the residual cleaning liquid to evaporate and discharge, thereby improving the cleaning effect of the residual cleaning liquid.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic cut-off closed sampler, characterized in that: include: Sampling tube (1); A sampling mechanism, the sampling mechanism comprising a mounting block (2) slidably connected to the inner wall of a sampling barrel (1), the lower end of the mounting block (2) passing through the lower end of the sampling barrel (1) and being fixedly connected to a sampling head (3), the side wall of the sampling barrel (1) being symmetrically fixedly connected to two sampling boxes (4), the inner walls of the two sampling boxes (4) being sealed and slidably connected to a sliding plug (5), the sliding plug (5) dividing the interior of the sampling box (4) into two parts, a sampling cavity (501) and a pump air cavity (502), the sampling cavity (501) being connected to the sampling head (3) via a one-way sampling tube (6), the one-way sampling tube (6) being made of a hose, the inner wall of the sampling cavity (501) being fixedly connected to a one-way sample outlet tube (7), the other end of the one-way sample outlet tube (7) passing through the side wall of the sampling box (4) and being fixedly connected to a sample outlet head (8), the lower end of the sampling box (4) being fixedly connected to a placement table (9); A cleaning mechanism, the cleaning mechanism comprising a rotating shaft (16) rotatably connected to the inner wall of the sampling chamber (501), a cleaning roller (17) being fixedly connected to the side wall of the rotating shaft (16), and a plurality of bristles (18) being fixedly connected to the side wall of the cleaning roller (17); The sampling mechanism further comprises a slider (10) slidably connected to the inner wall of the sampling barrel (1), the lower end of the slider (10) being symmetrically rotatably connected to two connecting rods (11), the side wall of the sliding plug (5) being fixedly connected to a push rod (12), one end of the push rod (12) extending into the sampling barrel (1) and being rotatably connected to the lower end of the connecting rod (11), a reciprocating screw (13) being rotatably connected to the top of the sampling barrel (1), the side wall of the reciprocating screw (13) being threadedly connected to the slider (10), the upper end of the sampling barrel (1) being fixedly connected to a motor (14), the output end of the motor (14) passing through the upper end of the sampling barrel (1) and being fixedly connected to the reciprocating screw (13); The lower end of the reciprocating screw (13) is fixedly connected to a screw (15), and the side wall of the screw (15) is threadedly connected to the mounting block (2); The cleaning mechanism further comprises a first air inlet cavity (19) provided in the cleaning roller (17), a plurality of air jet holes (20) being provided on the inner wall of the first air inlet cavity (19), a one-way valve being installed on the inner wall of the air jet hole (20), a transverse groove (21) being provided in the rotating shaft (16), the transverse groove (21) being connected to the first air inlet cavity (19) via a connecting groove (22), a rotating joint (23) being fixedly connected to the side wall of the sampling box (4) via a bracket, one end of the rotating shaft (16) passing through the side wall of the sampling box (4) and being fixedly connected to the rotating joint (23), a one-way air inlet pipe (24) being fixedly connected to the inner wall of the pump air cavity (502), a one-way air supply pipe (25) being fixedly connected to the inner wall of the pump air cavity (502), and the other end of the one-way air supply pipe (25) being fixedly connected to the rotating joint (23).

2. An automatic cut-off sealed sampler according to claim 1, characterized in that: in: The sampling tube (1) is provided with an extrusion mechanism, the extrusion mechanism comprising an annular plate (47) fixedly connected to the side wall of the sampling tube (1), the upper end of the annular plate (47) being symmetrically provided with two slide grooves (26), the inner walls of the two slide grooves (26) being symmetrically slidably connected with two moving blocks (27), the upper ends of the two moving blocks (27) being fixedly connected with a mounting plate (28), the side walls of the two mounting plates (28) being close to each other being fixedly connected with a plurality of extrusion heads (29), the plurality of extrusion heads (29) being arranged in an interlaced manner, and the plurality of extrusion heads (29) being made of a material with good thermal conductivity.

3. An automatic cut-off sealed sampler according to claim 2, characterized in that: in: The extrusion mechanism further comprises a second air inlet cavity (30) provided in the mounting plate (28); a third air inlet cavity (31) is provided in each of the plurality of extrusion heads (29); the second air inlet cavity (30) is connected to the third air inlet cavity (31) via a connecting hole (32); an air leakage hole (33) is provided on an inner wall of the third air inlet cavity (31); a pressure relief valve is installed on an inner wall of the air leakage hole (33); and the pump air cavity (502) is connected to the second air inlet cavity (30) via a one-way air outlet pipe (34).

4. The automatic cut-off sealed sampler according to claim 3, characterized in that: in: A driving mechanism is installed in the pump air cavity (502), and the driving mechanism includes a first rotating rod (35) rotatably connected to the inner wall of the pump air cavity (502), a gear (36) fixedly connected to the side wall of the first rotating rod (35), a rack (37) fixedly connected to the upper end of the push rod (12), the gear (36) and the rack (37) meshingly connected, one end of the first rotating rod (35) passes through the side wall of the sampling box (4) and is fixedly connected to a driving wheel (38), the side wall of the rotating shaft (16) is fixedly connected to a driven wheel (39), and the driving wheel (38) is connected to the driven wheel (39) through a synchronous belt.

5. The automatic cut-off sealed sampler according to claim 4, characterized in that: in: The driving mechanism further comprises a bidirectional lead screw (40) rotatably connected to the inner wall of the slide groove (26); the side wall of the bidirectional lead screw (40) is threadedly connected to the two moving blocks (27); the side wall of the bidirectional lead screw (40) is fixedly connected to a first bevel gear (41); the side wall of the sampling box (4) is fixedly connected to a transverse plate (42); the lower end of the transverse plate (42) is rotatably connected to a second rotating rod (43); the lower end of the second rotating rod (43) is fixedly connected to a second bevel gear (44); the first bevel gear (41) is meshingly connected to the second bevel gear (44); the side wall of the first rotating rod (35) is fixedly connected to a third bevel gear (45); the upper end of the second rotating rod (43) passes through the upper end of the transverse plate (42) and is fixedly connected to a fourth bevel gear (46); the third bevel gear (45) is meshingly connected to the fourth bevel gear (46).

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