A portable collection and detection device and detection method for petrochemical industry

Abstract

This invention discloses a portable sampling and detection device and method for petrochemical applications. The sampling and detection device includes a sampling cylinder with an open lower end. Inside the sampling cylinder are two sets of identical and synchronously rotating transmission mechanisms. Each transmission mechanism includes an upper roller, a lower roller, and a transmission belt fitted onto the upper and lower rollers. Several sampling boxes are rotatably connected to the transmission belts. Each sampling box has a sealing gasket at its opening. The sampling boxes on the two transmission belts correspond one-to-one with each other as the transmission belts move, enabling the cyclic merging and separation of the two sampling boxes. This invention uses a cable to drive the sampling cylinder vertically, coordinating with the horizontal displacement of the main housing. This, combined with the merging of the sampling boxes on the two transmission belts within the sampling cylinder, allows for continuous multi-point sampling with higher sample collection efficiency. Furthermore, it can sample some less fluid fluids or solids through a clamping method, resulting in a wider sample collection range.

Description

Technical Field

[0001] This invention relates to the field of sampling technology, and in particular to a portable sampling and detection device and method for petrochemical applications. Background Technology

[0002] In the petrochemical industry, sampling and testing are extremely important. This involves collecting petrochemical products and then analyzing them using specific methods. Petrochemical products exist in various forms, including solids, liquids, and solid-liquid mixtures. Currently, most sampling and testing devices are single-point detectors, which have significant drawbacks: First, single-point sampling cannot comprehensively reflect the characteristics of a sample because its composition may be uneven, and a single sample cannot represent the overall quality. Second, the operational process of single-point sampling limits efficiency. After each sampling, the sample must be unloaded before a second sampling can be performed. If multi-point sampling is required, the sampling and unloading process must be repeated, making continuous multi-point sampling impossible and time-consuming.

[0003] A search revealed a Chinese invention patent with publication number CN119804020A, which discloses a portable sampling and detection device and method for liquid petrochemicals. The device uses magnetic negative pressure adsorption to achieve sample aspiration and sampling, and can continuously sample from multiple points. However, due to the diverse viscosity and state of petrochemical samples, the sampling and detection device cannot directly sample highly viscous liquid samples, nor can it sample solid samples, resulting in the limitations of existing petrochemical sampling and detection methods. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a portable sampling and detection device and method for petrochemical applications. The invention utilizes a cable to drive the sampling cylinder vertically, coordinating with the horizontal movement of the main housing. Furthermore, the sampling boxes on two drive belts within the sampling cylinder move closer together, merging and converging. This enables continuous multi-point sampling with higher efficiency. Additionally, it allows for sampling of less fluid fluids or solids through a clamping mechanism, resulting in a wider sampling range.

[0005] In a first aspect, the present invention provides a portable data acquisition and detection device for petrochemical applications, which is achieved by the following technical solution.

[0006] A portable sampling and detection device for petrochemical applications includes a sampling cylinder with an open lower end. Inside the sampling cylinder are two sets of identical and synchronously rotating transmission mechanisms. Each transmission mechanism includes an upper roller, a lower roller, and a transmission belt sleeved on the upper and lower rollers. Several sampling boxes are rotatably connected to the transmission belt. The opening of each sampling box is equipped with a sealing gasket. The sampling boxes on the two transmission belts correspond one-to-one as the transmission belts rotate, realizing the cyclic merging and separation of the two sampling boxes.

[0007] Furthermore, the inner wall of the transmission belt is provided with teeth; the outer walls of the upper and lower rollers are provided with tooth grooves for the teeth to engage; the ends of the two upper rollers are meshed by gears, and one of the upper rollers is connected to the motor.

[0008] Furthermore, a main box is provided above the sampling cylinder, and a winding reel is provided inside the main box. A winding groove is formed between the inner wall of the main box and the winding reel. A winding opening communicating with the winding groove is provided at the bottom of the main box. A graduated cable is wound on the winding reel, and the unused end of the cable passes through the winding opening and connects to the sampling cylinder. A bolt is threaded through the side wall of the main box at the winding opening and connected to it. The winding reel is also connected to a crank handle placed outside the main box.

[0009] Furthermore, a sampling plate is slidably connected inside the sampling box, and the sampling plate is connected to the bottom wall of the sampling box via a tension spring; the sampling plate is connected to a drive bar, which passes through the bottom of the sampling box and the transmission belt; a double-headed hook with a conical end is also provided between the upper roller and the lower roller, and the drive bar passes through the transmission belt and abuts against the double-headed hook.

[0010] Furthermore, the lower outer wall of the double-headed hook is provided with multiple spherical protrusions at intervals; the end of the drive bar is arc-shaped and can pass over the spherical protrusions.

[0011] Furthermore, the sampling box has box rods on both sides, which are slidably inserted into the box holes on both sides of the sampling box. A spring is provided between the bottom wall of the box hole and the box rod. The two sides of the transmission belt are bent outward to form side belts. The sampling box is inserted into the side holes on the side belts through the box rods.

[0012] Furthermore, the sampling box opening is provided with a sealing groove for embedding a sealing gasket, and the sealing groove is connected to the space between the bottom wall of the sampling box and the sampling plate through an air hole.

[0013] Furthermore, the inner wall of the sampling tube is symmetrically provided with scrapers, which are in contact with the opening of the sampling box; both the upper and lower ends of the scraper are provided with inclined guide surfaces.

[0014] Furthermore, a notch is formed at the top of the sampling tube.

[0015] Secondly, the present invention provides a portable acquisition and detection method for petrochemical applications, which is achieved by the following technical solution.

[0016] A portable data acquisition and detection method for petrochemical applications, employing the aforementioned portable data acquisition and detection device for petrochemical applications, comprises the following specific steps: S1: Loosen the bolt to disengage from the cable, turn the handle to unwind the cable, and the cable will move the sampling cylinder down to the corresponding sampling position. Then, tighten the bolt to re-engage with the cable and adjust the horizontal position of the sampling cylinder. S2: Start the motor to drive the two transmission belts to drive synchronously in opposite directions. The transmission belts will drive the sampling boxes on the outer wall to drive. The sampling boxes on the two transmission belts will circulate and collect samples. After the sampling of one point is completed, the motor will stop working. S3: After the sampling cylinder moves to the next sampling position, the motor is started again, and the two corresponding sampling boxes are closed to collect samples, thus completing multi-point continuous sampling. S4: After the sampling tube has been collected, the motor is controlled to rotate in the opposite direction. Multiple closed sampling boxes will open in sequence, and the samples will be released from the sampling boxes one by one.

[0017] This application has the following beneficial effects: (1) The present invention uses a cable to drive the sampling cylinder to move vertically and the main box to move horizontally. Then, the sampling boxes on the two transmission belts inside the sampling cylinder move closer to each other and merge. In this way, on the one hand, continuous sampling at multiple points can be achieved, and the sample collection efficiency is higher. On the other hand, it can also sample some fluids or solids with poor flowability by clamping, and the sample collection range is wider.

[0018] (2) During the process of the drive bar moving along the end of the double-headed hook, the tension spring will pull the sampling plate to slide inside the sampling box and approach the bottom wall of the sampling box, so that the sampling space of the sampling box is opened. After the two corresponding sampling boxes are combined, the sampling space inside the sampling box is opened to the maximum. During the process of opening the sampling space, the two corresponding sampling boxes will be closed to sample, thus improving the accuracy of the sample sampling position and the sampling effect of the sampling box, and avoiding the sample entering the sampling box in a non-sampling position, which will affect the sample collection effect.

[0019] (3) The sampling plate of the present invention will push the sample inside the sampling box out. The sampling plate will move to the position of the sampling box opening. When the driving space expands, a negative pressure is formed. Under the action of negative pressure, the gas in the sealing groove is sucked into the driving space along the air hole. The sealing gasket shrinks back into the sealing groove. Since the sampling box rotates and transitions at the lower end of the transmission belt, the sampling box can have a flipping force, so that the sample in the sampling box is thrown out under the multiple actions of inertia and the pushing force of the sampling plate, thereby improving the sample unloading effect in the sampling box. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an isometric view of the present invention; Figure 3 This is a cross-sectional view of the main box of the present invention; Figure 4 This is a schematic diagram of the sampling tube of the present invention; Figure 5 This is a schematic diagram of the internal structure of the sampling cylinder of the present invention; Figure 6 yes Figure 5 Enlarged view of section A in the middle; Figure 7 This is a schematic diagram of the structure of the upper roller, double-headed hook, and lower roller of the present invention; Figure 8 This is a schematic diagram of the structure of the double-headed hook of the present invention; Figure 9 This is a cross-sectional view of the transmission belt and sampling box of the present invention; Figure 10 This is a schematic diagram of the sampling box of the present invention; Figure 11 This is a cross-sectional view of the sampling box of the present invention; Figure 12 This is a flowchart of the method of the present invention.

[0021] Among them, 1. Sampling cylinder; 11. Upper roller; 12. Lower roller; 13. Gear; 14. Motor; 15. Gear groove; 16. Probe; 17. Annular groove; 18. Notch; 2. Transmission belt; 21. Side belt; 22. Tooth; 23. Side hole; 24. Through groove; 3. Sampling box; 30. Box hole; 301. Spring; 31. Box rod; 32. Sealing gasket; 33. Sampling plate; 34. Drive groove; 35. Drive bar; 36. Tension spring; 37. Sampling space; 38. Drive space; 381. Air hole; 39. Sealing groove; 4. Main box; 41. Power supply; 42. Rewinding groove; 43. Alarm; 44. Rewinding opening; 45. Crank handle; 46. Bolt; 5. Cable; 51. Sealing cover; 6. Double-headed hook; 61. Spherical protrusion; 7. Scraper; 71. Guide surface. Detailed Implementation

[0022] The present patent application will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1-11 As shown, a portable sampling and detection device for petrochemical applications includes a sampling cylinder 1 with an open lower end; an upper roller 11 and a lower roller 12 are rotatably connected to the upper and lower sides of the inner side of the sampling cylinder 1, respectively; the ends of the two upper rollers 11 are meshed by gears 13, and one of the upper rollers 11 is driven by a motor 14; a transmission belt 2 is driven to the outer wall of the upper roller 11 and the corresponding lower roller 12; the edge of the transmission belt 2 is bent outward to form a side strip 21; the two side strips 21 on the outer side of the transmission belt 2 are rotatably connected to the box rod 31 of the sampling box 3; a sealing gasket 32 ​​is connected to the opening of the sampling box 3; the sampling boxes 3 on the two transmission belts 2 correspond one-to-one with the transmission belt 2; the sampling boxes 3 on the two transmission belts 2 can be cyclically merged and separated; the inner wall of the transmission belt 2 is provided with teeth 22; the outer walls of the upper roller 11 and the lower roller 12 are provided with tooth grooves 15 for the teeth 22 to engage.

[0024] In this embodiment, a main box 4 is provided above the sampling cylinder 1; a power supply 41 is provided on the rear side of the main box 4 and a winding reel is rotatably provided inside; an alarm 43 is provided on the top of the main box 4; a winding opening 44 is provided at the bottom of the main box 4, and a winding groove 42 is formed between the winding reel and the inner wall of the main box 4, with the winding opening 44 communicating with the winding groove 42; a crank handle 45 located outside the main box 4 is connected to the center of the winding reel; a graduated cable 5 is wound on the winding reel; the cable 5 is electrically connected to the power supply 41; the other end of the cable 5 passes through the winding opening 44 and is fixed to the top of the sampling cylinder 1; a threaded bolt 46 is threaded through the side wall of the main box 4 at the winding opening 44; a probe 16 is provided at the lower port of the sampling cylinder 1; a sealing cover 51 is provided between the main box 4 and the sampling cylinder 1, which is sleeved on the outside of the cable 5.

[0025] After grasping the handle on top of the main box 4, use the handle to move the main box 4 to the top opening position of the sampling container. The sampling cylinder 1 is suspended by the cable 5 and moved to the top opening position of the sampling container. Then loosen the bolt 46. After the bolt 46 is removed from the take-up reel 44, the contact between the bolt 46 and the cable 5 is released. After the bolt 46 is separated from the cable 5, the cable 5 is unlocked. Then turn the crank 45. The crank 45 is connected to the take-up reel, and the cable 5 is wound on the take-up reel. Therefore, the cable 5 will be unwound during the rotation of the crank 45. During the unwinding process, the cable 5 will gradually extend out of the take-up reel 44. The upper end of the cable 5 is electrically connected to the power supply 41, and the lower end of the cable 5 is fixedly connected to the sampling cylinder 1. Therefore, the cable 5 will be unwound during the unwinding process. During the process, the sampling cylinder 1 will move downwards, entering the sampling container. This device can sample not only petrochemical samples inside the container but also samples from other locations. As the sampling cylinder 1 moves downwards, the probe 16 at its lower end will move downwards synchronously. The probe 16 can be a camera or an infrared sensor, collecting data on obstacles around the sampling cylinder 1 to sense the lower end and prevent damage from contact with the bottom. The cable 5 has graduations on its outer wall, similar to a ruler, allowing the depth of the sampling cylinder 1 to be determined. The cable 5 is unwound and wound up with the rotation of the crank 45. Unwinding the cable 5 causes the sampling cylinder 1 to move downwards, and winding the cable 5 causes the sampling cylinder 1 to move downwards. Move the sampling cylinder 1 upwards to adjust its vertical position. Then tighten the bolt 46 so that it rests against the cable 5, pressing the cable 5 against the winding opening 44. A rubber sleeve is fitted to the end of the bolt 46 to reduce wear on the cable 5. After the cable 5 is pressed by the bolt 46, it is positioned, locking the vertical position of the sampling cylinder 1. Controlling the main box 4 to move horizontally will cause the main box 4 to move the cable 5 and the sampling cylinder 1 connected to the cable 5 horizontally. This allows the sampling cylinder 1 to be adjusted in both the vertical and horizontal directions. After the sampling cylinder 1 and probe 16 have completed the sampling position adjustment, press the start button on the main box 4. Pressing the button will activate the motor 14, which will then work with the cable. 5. Electrical connection: Power supply 41 transmits power to cable 5, which in turn transmits power to motor 14 inside sampling cylinder 1. During rotation, motor 14 drives one of the upper rollers 11. The ends of the two upper rollers 11 mesh with gears 13, causing the two gears 13 to rotate synchronously in opposite directions. The outer wall of each upper roller 11 has grooves 15 for the teeth 22 of the inner wall of the transmission belt 2 to engage, allowing the upper roller 11 to drive the transmission belt 2. The two transmission belts 2 rotate synchronously in opposite directions, with their edges moving upwards from bottom to top. During this rotation, the transmission belts 2 drive the sampling boxes 3 on their outer walls to move synchronously. The sampling boxes 3 on the two transmission belts 2 correspond one-to-one.As the sampling boxes 3 at the lower end of the two drive belts 2 rotate upwards and approach each other, they surround and merge the sample. This allows for sampling of highly fluid pure liquids, poorly fluid fluids, solids, and suspended solids in liquids. Existing sampling devices, which use negative pressure adsorption, are limited in their ability to sample solids or poorly fluid fluids. This device addresses this limitation. The alarm 43 in this device provides an alert upon completion of a single sampling. Both the drive belts 2 and the sampling boxes 3 on them are made of rigid materials, making them resistant to damage. After the two corresponding sampling boxes 3 merge, the sealing gasket 32 ​​at the opening of the sampling box 3 serves as a buffer and seal. During sampling, the sealing cap 51 covers the opening of the sampling container. After sampling is completed at one location of the sampling cylinder 1, the sampling stops. When motor 14 stops rotating, the transmission belt 2 also stops rotating. Then, without removing the sampling cylinder 1 from the sampling container, it moves directly to the next sampling position. Motor 14 is then rotated again, and the transmission belt 2 rotates again, allowing the two empty sampling boxes 3 to be combined and tightened for sampling. This process is repeated to achieve continuous multi-point sampling. After sampling, bolt 46 is loosened, unlocking the cable 5 at the winding opening 44. Then, the crank handle 45 is turned in the opposite direction to wind up the cable 5. The cable 5 causes the sampling cylinder 1 to move upwards, and impurities on the surface of the cable 5 are removed by the sealing cover 51. The clean cable 5 is wound into the winding groove 42, ready for the next use. Bolt 46 is tightened to lock the cable 5. Then, motor 14 is turned in the opposite direction, and multiple combined sampling boxes 3 open sequentially. The samples from multiple sampling boxes 3 fall into the prepared sample bag, where they are then analyzed.

[0026] This invention uses cable 5 to drive the sampling cylinder 1 to move vertically and coordinate with the horizontal displacement of the main box 4. In addition, the sampling boxes 3 on the two transmission belts 2 inside the sampling cylinder 1 move closer and merge with each other. This enables continuous sampling at multiple points, resulting in higher sample collection efficiency. Furthermore, it can also sample some fluids or solids with poor flowability by clamping, thus expanding the sample collection range.

[0027] In another embodiment, a sampling plate 33 is slidably connected to the inner side of the sampling box 3; a drive groove 34 is provided through the bottom of the sampling box 3; a drive bar 35 is slidably connected in the drive groove 34; the drive bar 35 is fixedly connected to the sampling plate 33; the sampling plate 33 is fixedly connected to the inner bottom wall of the sampling box 3 by a tension spring 36; a through groove 24 is provided on the outer wall of the transmission belt 2 for the drive bar 35 to pass through; an annular groove 17 is provided on the outer walls of the upper roller 11 and the lower roller 12; the annular groove 17 on the outer wall of the upper roller 11 and the annular groove 17 on the lower roller 12 hook the double-headed hook 6; the inner openings of the two double-headed hooks 6 are arranged opposite each other; the ends of the double-headed hooks 6 are conical.

[0028] During the sampling process, the transmission belt 2 drives the sampling box 3 to move. As the transmission belt 2 moves, the sampling box 3 also drives the sampling plate 33 on its inner side to move. The sampling box 3 gradually moves from the side where the two double-headed hooks 6 are far apart to the side where they are close together. The sampling box 3 drives the sampling plate 33 and the drive bar 35 to move. The tension spring 36 provides a tension force to the sampling plate 33 near the inner bottom wall of the sampling box 3, so that the sampling plate 33 drives the drive bar 35 to press against the outer wall of the double-headed hooks 6. At the non-end position of the double-headed hooks 6, the drive bar 35 is restricted, so the sampling plate 33 is located on the inner side of the sampling box 3 near the opening, thus blocking the inner side of the sampling box 3. Since the ends of the double-headed hooks 6 are conical, that is, the thickness of the ends of the double-headed hooks 6 is reduced, as the drive bar 35 moves along the ends of the double-headed hooks 6, the tension spring 36 pulls the sampling plate 33 to slide and move closer to the sampling box 3. The inner bottom wall allows the sampling space 37 of the sampling box 3 to open. After the two corresponding sampling boxes 3 are combined, the sampling space 37 inside the sampling box 3 opens to its maximum. During the opening of the sampling space 37, the two corresponding sampling boxes 3 will retract to collect samples, thus improving the accuracy of the sample sampling position and the sampling effect of the sampling box 3, and preventing samples from entering the sampling box 3 in non-sampling positions and affecting the sample collection effect. When it is necessary to control the opening of the sampling box 3, the transmission belt 2 will drive the sampling box 3 to reverse the transmission, and the two corresponding sampling boxes 3 will separate and open at the opening of the sampling cylinder 1. The drive bar 35 corresponding to the sampling box 3 will be squeezed outward by the double-headed hook 6. During the outward movement of the drive bar 35, it will overcome the tension spring 36 and drive the sampling plate 33 to move inside the sampling box 3. The sampling plate 33 will push the sample out of the sampling box 3, so that the sample can be successfully unloaded from the device.

[0029] In another embodiment, scrapers 7 are symmetrically arranged on the inner wall of the sampling cylinder 1; guide surfaces 71 are inclinedly arranged at the upper and lower ends of the scrapers 7; the scrapers 7 are in contact with the opening of the sampling box 3.

[0030] In this embodiment, the sampling plate 33 is slidably and sealed to the sampling box 3; the driving strip 35 is slidably and sealed to the driving groove 34; the sampling plate 33 divides the internal space of the sampling box 3 into a sampling space 37 and a driving space 38; the opening of the sampling box 3 is provided with a sealing groove 39 corresponding to the sealing gasket 32; the sealing gasket 32 ​​is an elastic membrane and is fixedly connected in the sealing groove 39; the inner side of the sealing groove 39 is connected to the driving space 38 through an air hole 381.

[0031] During sampling, the drive belt 2 moves the sampling box 3 from the side where the two double-headed hooks 6 are far apart to the side where they are close together. The drive bar 35 corresponding to the sampling box 3 gradually loses the restraint of the double-headed hooks 6. The tension spring 36 pulls the sampling plate 33 to slide along the inner side of the sampling box 3 and move closer to the bottom wall of the sampling box 3. The gas in the drive space 38 is pressurized and flows into the sealing groove 39 through the air hole 381, causing the sealing gasket 32 ​​in the sealing groove 39 to bulge under pressure. Thus, after the two sampling boxes 3 are closed for sampling, the expanded sealing gasket 32 ​​seals the opening of the two sampling boxes 3, preventing sample leakage and ensuring the sampling stability. When it is necessary to remove the sample from the sampling box 3, the sampling box 3 moves from the side where the two double-headed hooks 6 are close together to the side where they are far apart. The double-headed hooks 6 gradually increase the pressure on the drive bar 35 of the sampling box 3. The drive bar 35 then moves the sampling plate 33 to the sampling box 3. The inner side of the box 3 slides and overcomes the movement of the tension spring 36. The sampling plate 33 pushes the sample inside the sampling box 3 out. The sampling plate 33 moves to the position of the opening of the sampling box 3. When the driving space 38 expands, a negative pressure is formed. Under the action of negative pressure, the gas in the sealing groove 39 is sucked into the driving space 38 along the air hole 381. The sealing gasket 32 ​​shrinks and retracts into the sealing groove 39. Since the sampling box 3 rotates and transitions at the lower end of the transmission belt 2, the sampling box 3 can have a flipping force, so that the sample in the sampling box 3 is thrown out under the multiple actions of inertia and the pushing force of the sampling plate 33, improving the sample unloading effect in the sampling box 3. In addition, as the sampling box 3 moves to the two double-headed hooks 6 away from each other, the sampling box 3 will contact the scraper 7, so that the sample attached to the opening of the sampling box 3 is further scraped away. Since the sealing gasket 32 ​​retracts into the sealing groove 39, the sealing gasket 32 ​​is prevented from being scratched, thus protecting the sealing gasket 32.

[0032] In another embodiment, the double-headed hook 6 has multiple spherical protrusions 61 fixedly connected at intervals to the outer wall of its lower end; the end of the drive bar 35 is arc-shaped and can pass over the spherical protrusions 61.

[0033] During solid sample collection, the drive bar 35 moves along the end of the double-headed hook 6. When the drive bar 35 encounters the spherical protrusion 61, it is pressed outward. When the drive bar 35 passes the spherical protrusion 61, it is pulled inward by the tension spring 36 and moves back to its original position. This causes the sampling plate 33 inside the sampling box 3 to slide back and forth while maintaining a tendency to be close to the bottom wall of the sampling box 3. Thus, during the closing sampling process of the two corresponding sampling boxes 3, the sampling plates 33 inside the sampling boxes 3 can repeatedly squeeze the sample while maintaining a tendency to be close to each other, thereby compacting the sample and making the sample more compactly gathered inside the two sampling boxes 3, improving the sample collection effect. When it is necessary to remove the solid sample from the sampling box 3, the two corresponding sampling boxes 3 will separate and open. The sampling plates 33 inside the sampling boxes 3 will fluctuate back and forth while maintaining a distance from the bottom wall of the sampling box 3, thereby allowing the sample inside the sampling box 3 to fall out smoothly under the fluctuation, improving the stability of sample unloading.

[0034] In another embodiment, the sampling tube 1 has a notch 18 at the top; the upper inner side of the sampling tube 1 is connected to the outside through the notch 18.

[0035] During liquid sampling, residual gas and other fluids inside sampling cylinder 1 can flow smoothly from bottom to top from the inside of sampling cylinder 1 to ensure the stability of sampling cylinder 1 as it moves up and down in the sampling liquid.

[0036] In another embodiment, the sampling box 3 is provided with box holes 30 on the front and rear sides; the box rod 31 is slidably connected in the box hole 30; the bottom wall of the box hole 30 and the box rod 31 are connected by a spring 301; the side strip 21 is provided with side holes 23 evenly along the transmission direction; the box rod 31 can be inserted into the side holes 23.

[0037] Pressing the box rod 31 overcomes the spring 301, allowing it to move along the box hole 30 and approach the inner bottom wall of the box hole 30, so that the box rod 31 can be disengaged from the side hole 23, allowing the sampling box 3 to be replaced; after replacement, the sampling box 3 aligns the box rod 31 with the side hole 23, and the spring 301 can push the box rod 31 outward and lock it into the side hole 23.

[0038] like Figure 11 As shown, the present invention also provides a portable acquisition and detection method for petrochemical applications. This method employs the aforementioned portable acquisition and detection device for petrochemical applications, and the steps of this method are as follows: S1: Loosen bolt 46 to disengage from cable 5, turn handle 45 to unwind cable 5, cable 5 moves sampling cylinder 1 down to the corresponding sampling position, tighten bolt 46 to contact cable 5, and adjust the horizontal position of sampling cylinder 1. S2: Start motor 14 drives two transmission belts 2 to synchronously reverse transmission. Transmission belt 2 will drive the sampling box 3 on the outer wall to drive. The sampling box 3 on the two transmission belts 2 will circulate and collect samples. After completing the sampling at one point, stop motor 14. S3: After the sampling cylinder 1 moves to the next sampling position, the motor 14 is started again, and the two corresponding sampling boxes 3 are brought together to collect samples, thus completing multi-point continuous sampling. S4: After the sampling tube 1 is collected, the motor 14 is controlled to rotate in the opposite direction. The multiple closed sampling boxes 3 will open in sequence, and the samples will be released from the sampling boxes 3 in sequence.

[0039] The motor 14 of this application adopts an explosion-proof design to achieve the purpose of explosion protection, thereby ensuring that the device can operate stably for a long time.

[0040] In this application, the sampling cylinder 1 is directly fixed to a holding rod (not shown in the figure) at the upper end, and the holding rod directly drives the sampling cylinder 1 to move up and down and left and right.

[0041] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A portable sampling and detection device for petrochemical applications, comprising a sampling cylinder (1) with an open lower end, characterized in that: Two sets of identical and synchronously rotating transmission mechanisms are set inside the sampling cylinder (1). Each set of transmission mechanisms includes an upper roller (11), a lower roller (12), and a transmission belt (2) sleeved on the upper roller (11) and the lower roller (12). Several sampling boxes (3) are rotatably connected on the transmission belt (2). A sealing gasket (32) is provided at the opening of the sampling box (3). The sampling boxes (3) on the two transmission belts (2) correspond one-to-one with the transmission of the transmission belt (2), realizing the cyclic merging and separation of the two sampling boxes (3).

2. The portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The inner wall of the transmission belt (2) is provided with teeth (22); the outer walls of the upper roller (11) and the lower roller (12) are provided with tooth grooves (15) for the teeth (22) to be engaged; the ends of the two upper rollers (11) are meshed by gears (13), and one of the upper rollers (11) is connected to the motor (14).

3. The portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The sampling cylinder (1) is provided with a main box (4) above it. The main box (4) is provided with a winding reel. A winding groove (42) is formed between the inner wall of the main box (4) and the winding reel. The bottom of the main box (4) is provided with a winding opening (44) that communicates with the winding groove (42). A graduated cable (5) is wound on the winding reel. The unused end of the cable (5) passes through the winding opening (44) and connects to the sampling cylinder (1). A bolt (46) is threaded through the side wall of the main box (4) at the winding opening (44). The winding reel is also connected to a crank (45) placed outside the main box (4).

4. A portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The sampling box (3) is slidably connected to the sampling plate (33), and the sampling plate (33) is connected to the bottom wall of the sampling box (3) through the tension spring (36); the sampling plate (33) is connected to the drive bar (35), and the drive bar (35) passes through the bottom of the sampling box (3) and the transmission belt (2); a double-headed hook (6) with a curved cone shape is also provided between the upper roller (11) and the lower roller (12), and the drive bar (35) passes through the transmission belt (2) and abuts against the double-headed hook (6).

5. A portable data acquisition and detection device for petrochemical industry according to claim 4, characterized in that: The lower outer wall of the double-headed hook (6) is provided with a plurality of spherical protrusions (61) spaced apart; the end of the drive bar (35) is arc-shaped and can pass over the spherical protrusions (61).

6. A portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The sampling box (3) has a box rod (31) on both sides. The box rod (31) is slidably inserted into the box hole (30) on both sides of the sampling box (3). A spring (301) is provided between the bottom wall of the box hole (30) and the box rod (31). The transmission belt (2) has its edges bent outward to form a side belt (21). The sampling box (3) is inserted into the side hole (23) on the side belt (21) through the box rod (31).

7. A portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The sampling box (3) has a sealing groove (39) at the opening for the sealing gasket (32) to be embedded. The sealing groove (39) is connected to the space between the bottom wall of the sampling box (3) and the sampling plate (33) through the air hole (381).

8. A portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The inner wall of the sampling tube (1) is symmetrically provided with scrapers (7), and the scrapers (7) are in contact with the opening of the sampling box (3); the upper and lower ends of the scrapers (7) are provided with guide surfaces (71) at an incline.

9. A portable data acquisition and detection device for petrochemical industry according to claim 1, characterized in that: The sampling tube (1) has a notch (18) at the top.

10. A portable data acquisition and detection method for petrochemical applications, characterized in that: The portable data acquisition and detection device for petrochemical industry described in any one of claims 1-9 comprises the following specific steps: S1: Loosen the bolt (46) to disengage from the cable (5), turn the handle (45) to unwind the cable (5), and the cable (5) will move the sampling cylinder (1) down to the corresponding sampling position. Then tighten the bolt (46) to contact the cable (5) and adjust the horizontal position of the sampling cylinder (1). S2: Start the motor (14) to drive the two transmission belts (2) to drive synchronously in opposite directions. The transmission belts (2) will drive the sampling box (3) on the outer wall to drive. The sampling boxes (3) on the two transmission belts (2) will cycle and collect samples. After completing the sampling at one of the points, stop the motor (14) from working. S3: After the sampling tube (1) moves to the next sampling position, the motor (14) is started again, and the two corresponding sampling boxes (3) are gathered together to collect samples, thus completing the multi-point continuous sampling. S4: After the sampling tube (1) is collected, the control motor (14) is rotated in the opposite direction. Multiple closed sampling boxes (3) will open in sequence, and the samples will be released from the sampling boxes (3) in sequence.

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