A chlorination reaction production reactor sampling device

Abstract

The present application relates to the technical field of sampling, and discloses a reaction kettle sampling device for chlorination reaction production, which comprises a sampling port arranged on a reaction kettle and a sealing cover used for closing the sampling port, a sampling bottle has an open upper end and a closed lower end, an installation hole penetrating up and down is arranged at the bottom end of the sampling bottle, a feeding pipe is arranged in the sampling bottle, a sampling pipe is arranged downward at the bottom of the sampling bottle and communicates with the feeding pipe, a negative pressure mechanism comprises a negative pressure pipe connected to the upper end of the sampling bottle, a piston block slidingly installed in the negative pressure pipe in the up-down direction, and a valve assembly arranged between the negative pressure pipe and the sampling bottle, a locking rod is slidingly installed on the reaction kettle in the horizontal direction, a pull rod one is fixedly installed on the piston block, the top end of the pull rod one exceeds the negative pressure pipe, a clamping block one is arranged at the top end of the pull rod one, and a groove matched with the clamping block one is arranged on the locking rod; the present application has the beneficial effect of improving the purity and accuracy of samples during sampling.

Description

Technical Field

[0001] This invention relates to the field of sampling technology, and specifically to a sampling device for a reaction vessel used in chlorination production. Background Technology

[0002] In the chlorination reaction process, it is crucial to conduct regular sampling and analysis to monitor the reaction progress in real time, ensure the quality of the final product, and monitor the process status. The core purpose of sampling is to obtain representative samples of the reaction mixture to accurately assess the current chlorination depth (such as chlorine content or concentration of specific products), detect the conversion rate of raw materials, and monitor the formation of key intermediates or target products. At the same time, it is necessary to monitor for the presence of abnormal by-products or excessive free chlorine. This information is the direct basis for judging whether the reaction is proceeding according to the expected path, whether the predetermined endpoint has been reached, whether the current operating conditions (such as temperature and chlorine flow rate) are suitable, and the safety of the process. It provides key data support for timely adjustment of process parameters, optimization of reaction efficiency, and ultimately ensuring that the product quality meets the specifications.

[0003] Chinese patent document CN119178647B discloses a polyester polyol sampling device, including a reaction vessel body. A flow pipe is fixedly connected to one side of the bottom of the reaction vessel body, and a sampling tube is provided on one side of the flow pipe. A discharge pipe is provided on the side of the sampling tube away from the flow pipe. Fixing components are provided on both sides of the sampling tube. The fixing components include a support frame used in conjunction with the sampling tube. A disc is fixedly connected to both sides of the support frame. A rotating plate is rotatably connected to the opposite surface of the two discs. An arc-shaped block and a first spring are symmetrically arranged on the surface of the disc. An auxiliary component and a locking component are used in conjunction with the arc-shaped block. The auxiliary component can release the limiting position of the arc-shaped block. At the same time, the auxiliary component will also drive the locking component during operation, so that the locking component and the arc-shaped block can simultaneously release the fixing of the sampling tube, so that the sampling tube can be disassembled and then disassembled and cleaned after the experiment.

[0004] In the aforementioned technology, when sampling the reactor, a fixed pipeline is set up to discharge the material inside the reactor. Then, a sampling tube is installed at the end of the pipeline to complete the sampling. After sampling, some material that has not been completely discharged remains in the pipeline. Since the pipeline is connected to the inside of the reactor, it is not convenient to clean the pipeline before the current reaction is completed. The material remaining in the pipeline may solidify or adhere. When sampling is performed at different time points during the reaction process, the sample will contain the sample remaining in the pipeline from the previous sampling, which will affect the purity and accuracy of the sample in the current sampling. Summary of the Invention

[0005] This invention provides a sampling device for a reaction vessel used in chlorination production, which aims to solve the problem in related technologies where, when sampling is performed at different time points during the reaction process, the sample may contain residual samples from the previous sampling in the pipeline, thus affecting the purity and accuracy of the sample in the current sampling.

[0006] A sampling device for a reaction vessel used in chlorination production includes a sampling port on the reaction vessel and a sealing cover for closing the sampling port, and further includes:

[0007] The sampling bottle is open at the top and closed at the bottom. The bottom of the sampling bottle has a through mounting hole. The sampling bottle is equipped with a feed tube. The lower end of the feed tube is fixedly installed in the mounting hole. The bottom of the sampling bottle extends downwards and the sampling tube is connected to the feed tube.

[0008] The negative pressure mechanism includes a negative pressure tube connected to the upper end of the sampling bottle, a piston block slidably installed in the negative pressure tube in the vertical direction, and a valve assembly disposed between the negative pressure tube and the sampling bottle. A locking rod is slidably installed on the reactor in the horizontal direction. A pull rod is fixedly installed on the piston block. The top end of the pull rod extends beyond the upper end of the negative pressure tube. A locking block is provided at the top end of the pull rod. A groove adapted to the locking block is provided on the locking rod.

[0009] Its advantages are as follows: By setting up a sampling bottle and a negative pressure mechanism, during sampling, after the sampling bottle is placed into the reaction vessel, the downward movement of the sampling bottle creates a negative pressure state in the negative pressure tube, eliminating the need for a separate negative pressure pump. When the sampling tube comes into contact with the material, a valve assembly controls the connection between the sampling bottle and the negative pressure tube, allowing the material to be quickly drawn into the sampling bottle after contact. Since the sampling bottle is placed directly into the reaction vessel for sampling, there is no need to set up a long liquid outlet pipeline. Due to the short length of the sampling tube, only the sampling tube needs to be cleaned for the next sampling, avoiding the retention of residual liquid from the previous sampling in the long liquid outlet pipeline, thereby improving the purity and accuracy of the sample during sampling.

[0010] Preferably, the valve assembly includes an annular platform fixedly installed inside the negative pressure pipe, a sealing block slidably installed in the annular platform in the vertical direction, a driving component three for driving the sealing block to move, and a locking component for locking the sealing block to the annular platform. An exhaust groove is provided on the outer circumferential wall of the sealing block. When the sampling tube comes into contact with the material, the locking component disconnects the sealing block from the annular platform, and the driving component three drives the sealing block to rise inside the annular platform, so that the exhaust groove connects the negative pressure pipe to the sampling bottle.

[0011] Its effect is that by setting a sealing block, the chamber inside the negative pressure tube and the chamber inside the sampling bottle can be separated into two separate chambers, and the chamber inside the negative pressure tube and the chamber inside the sampling bottle can also be connected, thereby enabling the sampling bottle to be in a negative pressure state.

[0012] Preferably, the locking element includes an elastic telescopic block that is slidably mounted on the sealing block in the horizontal direction. An annular groove is provided on the inner wall of the ring platform. In the initial state, the elastic telescopic block is stuck in the annular groove. When the sampling tube comes into contact with the material, the driving element drives the sealing block to move upward relative to the ring platform.

[0013] Preferably, the driving component three includes a pull rod two fixedly installed on the sealing block, a through hole five extending vertically through the piston block, the pull rod two passing through the through hole five, the top end of the pull rod two extending beyond the upper end of the piston block, and a limiting plate one fixedly installed on the top end of the pull rod two, and a limiting plate two fixedly installed on the pull rod two below the piston block.

[0014] Its effect is that by setting limiting plate one and limiting plate two on the upper and lower sides of the piston block respectively, the piston block can move in the negative pressure pipe to make the sealing block rise or fall in the ring platform without the need for an additional power source.

[0015] Preferably, the lower end of the ring extends beyond the lower end of the negative pressure pipe, and the outer circumferential surface of the ring is made of flexible material.

[0016] Preferably, the upper end of the feed pipe is closed, and a through hole penetrating both the inside and outside is provided on the circumferential wall of the feed pipe.

[0017] Preferably, a sleeve is fitted onto the feed pipe, and an elastic element is provided between the sleeve and the feed pipe to position the sleeve on the upper side of the through hole. The sampling device also includes a cylindrical plug.

[0018] Its effect is that by setting up a cylindrical plug and sleeve one, the through hole one can be closed at the same time by using the process of sealing the sampling bottle with the cylindrical plug after sampling is completed.

[0019] Preferably, the outer circumferential surface of the plunger is made of a flexible material.

[0020] Preferably, the sampling device further includes a lifting mechanism, which includes a lifting plate disposed in the sampling port and a driving component for driving the lifting plate to move up and down. The lifting plate has a through hole extending vertically, and a sleeve is fixedly installed on the lifting plate. A rotating rod is rotatably installed on the lifting plate, and a locking block is connected to the top of the rotating rod.

[0021] Its effect is that by setting up a lifting plate and a second locking block, the negative pressure tube and the sampling bottle can be lifted together during the lifting process of the lifting plate. At the same time, by setting up a first locking block and a locking rod, negative pressure is generated in the negative pressure tube and the sampling bottle during the lifting process.

[0022] Preferably, the driving component includes a motor fixedly mounted on the reactor and a lead screw connected to the output end of the motor. The lead screw passes through the lifting plate and is threadedly engaged with the lifting plate.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0024] 1. The sample tube is designed to be replaceable, allowing for quick cleaning after sampling. The cleaning process is also simple and convenient due to the short length of the sample tube.

[0025] 2. By setting up locking blocks one and two and locking rod, negative pressure can be generated in the negative pressure tube and sampling bottle during the lifting process of the lifting plate. Furthermore, by setting up a feed pipe in the sampling bottle, the residual material in the feed pipe and sampling tube can be automatically discharged into the reactor during the lifting process of the lifting plate, thereby reducing the waste of materials during sampling and making the sampling tube and feed pipe easier to clean in the subsequent cleaning process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the overall structure of sleeve three of the present invention.

[0028] Figure 3 This is a cross-sectional view of the negative pressure mechanism of the present invention.

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0030] Figure 5 This is a schematic diagram of the sampling bottle of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of tie rod one and tie rod two of the present invention.

[0032] Figure 7 This is a schematic diagram of the lifting plate of the present invention.

[0033] Figure 8 This is a front view of the sampling tube of the present invention.

[0034] Figure 9 This is a schematic diagram of the locking rod of the present invention.

[0035] Figure 10 This is a front view of the cylindrical stopper and sampling bottle of the present invention.

[0036] Figure label:

[0037] 1. Reactor; 2. Sleeve 3; 21. Sleeve 4; 22. Threaded rod; 23. Sleeve 5; 24. Ring; 3. Sealing cap; 4. Sampling bottle; 41. Feed pipe; 42. Sampling pipe; 43. Cylindrical plug; 44. Sleeve 1; 45. Compression spring 1; 46. Through hole 1; 5. Negative pressure mechanism; 51. Negative pressure pipe; 52. Piston block; 53. Pull rod 1; 54. Locking block 1; 55. Ring platform; 56. Sealing block; 57. Exhaust groove; 58. Sliding block; 59. Compression spring 2; 510. Pull rod 2; 511. Limiting plate 1; 512. Limiting plate 2; 6. Lifting mechanism; 61. Lifting plate; 62. Motor; 63. Smooth rod; 64. Lead screw; 65. Rotating rod; 66. Locking block 2; 67. Through hole 2; 68. Locking rod; 69. Sleeve 2. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] like Figure 1 , Figure 2 and Figure 10 As shown in the figure, a sampling device for a chlorination reaction production reactor according to an embodiment of the present invention includes a sampling port, a sealing cap 3, a sampling bottle 4, a negative pressure mechanism 5, and a lifting mechanism 6. The sampling port is opened on the reactor 1, the sealing cap 3 is hinged to the reactor 1 and is used to seal the sampling port, the sampling bottle 4 is used to store the material taken out from the reactor 1, the negative pressure mechanism 5 is used to generate a negative pressure in the sampling bottle 4, thereby drawing the material in the reactor 1 into the sampling bottle 4, and the lifting mechanism 6 is set in the sampling port and is used to move the sampling bottle 4 in the vertical direction in the reactor 1.

[0040] During sampling, the staff first installs the negative pressure mechanism 5 on the sampling bottle 4, then opens the sealing cap 3, and then places the sampling bottle 4 on the lifting mechanism 6. When the lifting mechanism 6 moves the sampling bottle 4 downward in the reactor 1, after the lower end of the sampling bottle 4 comes into contact with the material, the negative pressure mechanism 5 creates a negative pressure inside the sampling bottle 4, and then the material is sucked into the sampling bottle 4. Finally, the lifting mechanism 6 raises the sampling bottle 4, and the staff removes the sampling bottle 4 from the lifting mechanism 6 and separates the negative pressure mechanism 5 from the sampling bottle 4, thus completing the sampling.

[0041] like Figure 1As shown, a through-sleeve 2 is fixedly installed on the reactor 1 at the sampling port. The sealing cover 3 is hinged to the through-sleeve 2, and four hinge shafts are provided at the upper end of the through-sleeve 2. A sleeve 21 is fitted on each of the four hinge shafts. A threaded rod 22 extends outward along the radial direction of the outer circumferential wall of the sleeve 21. A sleeve 23 is fitted on the threaded rod 22, and a ring 24 is provided above the sleeve 23. The ring 24 has an opening. A through hole 3 is provided, and a threaded rod 22 passes through the through hole 3. The threaded rod 22 is threadedly engaged with the ring 24. When the sealing cover 3 closes the upper end of the sleeve 3 2, the threaded rod 22 is rotated so that the axis of the threaded rod 22 coincides with the vertical direction. Then the ring 24 is rotated so that the ring 24 moves downward along the threaded rod 22, thereby causing the ring 24 to press down on the sleeve 5 23, so that the sleeve 5 23 abuts against the sealing cover 3, thereby locking the sealing cover 3 and the sleeve 3 2.

[0042] like Figures 2-10 As shown, the lifting mechanism 6 includes a lifting plate 61 and a driving component 1. A sleeve 2 69 is fixedly installed on the upper end surface of the lifting plate 61. The sleeve 2 69 is used to place the sampling bottle 4. The driving component 1 is used to drive the lifting plate 61 to move up and down inside the reaction vessel 1.

[0043] like Figures 2-4 and Figure 7 As shown, the driving component includes a motor 62, a lead screw 64, and a guide rod 63. The motor 62 is fixedly installed on the outer circumferential wall of the sleeve 3 2 located inside the reactor 1. The lead screw 64 is connected to the output end of the motor 62. The guide rod 63 is fixedly installed on the sleeve 3 2, and the lead screw 64 and the guide rod 63 are arranged in a circumferential array around the sleeve 3 2. The lifting plate 61 has two through holes 4 that extend vertically. The lead screw 64 and the guide rod 63 are respectively inserted into the two through holes 4, and the lead screw 64 and the lifting plate 61 are threadedly engaged. During sampling, after the sampling bottle 4 is placed inside the sleeve 3 2, the motor 62 starts and drives the lead screw 64 to rotate forward. The forward rotation of the lead screw 64 drives the lifting plate 61 to descend inside the reactor 1.

[0044] like Figures 3-10As shown, the sampling bottle 4 includes a feed tube 41, a sampling tube 42, a cylindrical plug 43, and a sleeve 44. The upper end of the sampling bottle 4 is open, and the lower end is closed. A through-hole is provided at the bottom of the sampling bottle 4. The feed tube 41 is located inside the sampling bottle 4, and its lower end is fixedly installed in the mounting hole. A thread is provided on the inner circumferential wall of the mounting hole. A threaded groove is provided at the upper end of the outer circumferential wall of the sampling tube 42. During sampling, the sampling tube 42 is first installed in the mounting hole, so that the sampling tube 42... 2. A hexagonal prism is fixedly installed on the outer circumferential wall of the sampling tube 42, which is connected to the feed pipe 41 and located below the threaded groove. The hexagonal prism makes it easier to rotate the sampling tube 42. An annular gasket is fixedly installed on the upper end of the hexagonal prism. The upper end of the gasket is made of rubber. The gasket is used to improve the sealing of the connection between the sampling tube 42 and the sampling bottle 4. The lifting plate 61 has a through hole 67 that runs vertically through the tube. When the sampling bottle 4 is placed inside the sleeve 2, the sampling tube 42 is inserted into the sleeve. The sample tube 42 passes through the through hole 67 and its lower end extends beyond the lifting plate 61. It is used to draw material from the reactor 1. The upper end of the feed pipe 41 is closed, and a through hole 46 penetrating the inside and outside of the feed pipe 41 is provided on its circumferential wall. This allows the material to enter the sampling bottle 4 through the through hole 46 on the feed pipe 41, preventing the material from adhering to the negative pressure mechanism 5. A sleeve 44 is fitted onto the upper end of the feed pipe 41, with the upper end of the sleeve 44 closing the lower end opening. An elastic element, a compression spring 45, is provided between the upper end of the cylinder 44 and the feed tube 41. The diameter of the outer circumferential wall of the cylindrical plug 43 is the same as the diameter of the inner circumferential wall of the sampling bottle 4, and the outer circumferential surface of the cylindrical plug 43 is made of flexible material. When the cylindrical plug 43 is inserted into the sampling bottle 4, the cylindrical plug 43 will push the sleeve 44 downward, so that the sleeve 44 blocks the through hole 46, preventing the material in the sampling bottle 4 from entering the feed tube 41 through the through hole 46 and causing material leakage.

[0045] like Figures 2-6 As shown, the negative pressure mechanism 5 includes a negative pressure tube 51, a piston block 52, and a valve assembly. The lower end of the negative pressure tube 51 is connected to the upper end of the sampling bottle 4. The piston block 52 is slidably installed inside the negative pressure tube 51 in the vertical direction. The valve assembly is located between the negative pressure tube 51 and the sampling bottle 4 and is used to connect or disconnect the negative pressure tube 51 and the sampling bottle 4. A sliding groove is provided on the inner side wall of the sleeve 3 2. A locking rod 68 is slidably installed in the sliding groove 1 in the horizontal direction. A groove is provided on the locking rod 68. Two pull rods 1 53 extend upward from the upper end face of the piston block 52. The two pull rods 1 53 are arranged in a circular array around the axis of the piston block 52, and the top of the pull rods 1 53 extends beyond the upper end of the negative pressure tube 51. A locking block 1 54 is fixedly installed at the top of the pull rods 1 53. A rotating rod 65 is rotatably installed on the lifting plate 61. A locking block 2 66 is fixedly installed at the top of the rotating rod 65.

[0046] After the sampling bottle 4 is inserted into the sleeve 69, the locking block 54 is first inserted into the groove, thereby fixing the piston block 52 and the locking rod 68 together. Then, the rotating rod 65 is rotated so that the lower end face of the locking block 66 abuts against the upper end face of the negative pressure tube 51. Then, when the lifting plate 61 moves downward, the lifting plate 61 drives the sampling bottle 4 and the negative pressure tube 51 to move downward synchronously through the locking block 66. Since the locking block 54 is inserted into the groove at this time, during the downward movement of the negative pressure tube 51, the piston block 52 moves upward relative to the negative pressure tube 51 within the negative pressure tube 51. And because the valve at this time... With the door assembly closed, the negative pressure pipe 51 is not connected to the sampling bottle 4. Therefore, as the negative pressure pipe 51 moves downward, the pressure inside it gradually decreases. When the sampling pipe 42 comes into contact with the material, the valve assembly opens, connecting the negative pressure pipe 51 to the sampling bottle 4. At this time, the material in the reactor 1 enters the sampling bottle 4 through the sampling pipe 42 and the feed pipe 41 under the influence of negative pressure. Once the pressure in the sampling bottle 4 and the negative pressure pipe 51 is the same as the pressure in the reactor 1, no more material is fed into the sampling bottle 4. At this point, the liquid level in the sampling bottle 4 is lower than the through hole 4 on the feed pipe 41. The lifting plate 61 rises to a height of 6, then resets. During the rising process of the lifting plate 61, the piston block 52 moves downward relative to the negative pressure tube 51, thereby squeezing the air in the negative pressure tube 51 downward. Since the negative pressure tube 51 is connected to the sampling bottle 4 at this time, the air in the negative pressure tube 51 is squeezed into the sampling bottle 4 by the piston block 52. Since the height of the through hole 46 on the feed pipe 41 is higher than the liquid level of the material in the sampling bottle 4, the air entering the sampling bottle 4 from the negative pressure tube 51 will enter the feed pipe 41 through the through hole 46, and finally exit from the sampling tube 42. The process of removing the sample bottle 4 from the reactor 1 avoids residual material in the feed pipe 41 and sampling pipe 42, reducing material waste during sampling. It also reduces the dripping of material from the sampling pipe 42 when the sampling bottle 4 is removed from the reactor 1, preventing environmental pollution. Furthermore, when air passes through the feed pipe 41 and sampling pipe 42, it blows off some of the material on the inner walls of the feed pipe 41 and sampling pipe 42, facilitating cleaning of the feed pipe 41 and sampling pipe 42 after sampling. When the lifting plate 61 is reset, the valve assembly closes again, preventing material in the sampling bottle 4 from entering the negative pressure pipe 51.

[0047] like Figure 3 , Figure 4 and Figure 6As shown, the valve assembly includes a ring platform 55, a sealing block 56, a driving component 3, and a locking component. The ring platform 55 is fixedly installed inside the negative pressure pipe 51, and the lower end of the ring platform 55 extends beyond the lower end face of the negative pressure pipe 51. The sealing block 56 is slidably installed inside the ring platform 55 in the vertical direction. The driving component 3 is used to drive the sealing block 56 to move in the vertical direction inside the ring platform 55. The locking component is used to lock the sealing block 56 and the ring platform 55. Two exhaust grooves 57 are opened on the outer circumferential wall of the sealing block 56. The upper end of the exhaust grooves 57 is closed and the lower end is through. The two exhaust grooves 57 are arranged in a circular array around the axis of the sealing block 56. When the negative pressure pipe 51 is connected to the sampling bottle 4, the part of the ring platform 55 that extends beyond the negative pressure pipe 51 is inserted into the sampling bottle 4. The part of the lower end of the ring platform 55 that extends beyond the negative pressure pipe 51 is made of flexible material to improve the sealing between the negative pressure pipe 51 and the sampling bottle 4.

[0048] When the sampling tube 42 comes into contact with the material, as the negative pressure tube 51 continues to descend, the driving component causes the sealing block 56 to move upward relative to the ring platform 55 within the ring platform 55. Simultaneously, the locking component disconnects and locks the sealing block 56 from the ring platform 55. When the exhaust groove 57 on the outer circumferential wall of the sealing block 56 connects the negative pressure tube 51 to the sampling bottle 4, the air pressure inside the negative pressure tube 51 and the sampling bottle 4 is the same and both are negative pressure. At the same time, the material in the reactor 1, under the action of the negative pressure in the negative pressure tube 51 and the sampling bottle 4, passes through the sampling tube 42 and... The feed pipe 41 enters the sampling bottle 4. When the sampling bottle 4 stops feeding, the lifting plate 61 moves upward, causing the negative pressure pipe 51 and the sampling bottle 4 to move upward. When the lifting plate 61 resets, the driving component 3 drives the sealing block 56 to move downward relative to the ring platform 55. When the sealing block 56 resets on the ring platform 55, the exhaust groove 57 is sealed by the inner circumferential wall of the ring platform 55. At this time, the chamber in the negative pressure pipe 51 is disconnected from the chamber in the sampling bottle 4, and the locking component locks the sealing block 56 and the ring platform 55 again.

[0049] like Figure 3 , Figure 4 and Figure 6 As shown, the locking component includes two elastic telescopic blocks. Two sliding grooves are formed on the outer circumferential wall of the sealing block 56 along the radial direction of the sealing block 56. The two sliding grooves are arranged in a circular array around the axis of the sealing block 56. The two elastic telescopic blocks are slidably installed in the two sliding grooves in the horizontal direction, and the ends of the two elastic telescopic blocks that are far apart from each other are hemispherical. The elastic telescopic block is composed of a slider 58 and a compression spring 59. The two ends of the compression spring 59 are fixedly connected to the slider 58 and the sealing block 56, respectively. An annular groove is formed on the inner circumferential wall of the ring platform 55. In the initial state, the hemispherical end of the slider 58 is stuck in the annular groove under the push of the compression spring 59.

[0050] When the sampling tube 42 comes into contact with the material, the driving component three drives the sealing block 56 to move upward along the negative pressure tube 51. At this time, the slider 58 retracts into the sealing block 56 under the pressure of the annular groove, and the compression spring 59 is compressed and stores force until the slider 58 gradually moves to the upper side of the annular platform 55. Then, the compression spring 59 is released, and the slider 58 gradually extends out of the sliding groove under the pushing force of the compression spring 59. At this time, the exhaust groove 57 connects the negative pressure tube 51 with the sampling bottle 4. When the lifting plate 61 is reset, the driving component three drives the sealing block 56 to move upward. 6. Moves downward relative to the ring platform 55. At this time, the slider 58 retracts into the sealing block 56 again under the push of the ring platform 55, and the second spring 59 is compressed and stored again. As the second slide groove gradually reaches the same horizontal height as the ring groove, the second spring 59 is released again. The slider 58 gradually extends out from the second slide groove under the push of the second spring 59 and gets stuck in the ring groove. At this time, the exhaust groove 57 is sealed by the inner circumferential wall of the ring platform 55, and the chamber in the negative pressure pipe 51 is disconnected from the chamber in the sampling bottle 4.

[0051] like Figures 3-6 As shown, the driving component three includes a second pull rod 510, a first limiting plate 511, and a second limiting plate 512. The second pull rod 510 is fixedly installed on the upper end face of the sealing block 56. A through hole 5 is provided at the axis of the piston block 52, and the second pull rod 510 passes through the through hole 5, with the upper end of the second pull rod 510 extending beyond the upper end face of the piston block 52. The first limiting plate 511 and the second limiting plate 512 are located above and below the piston block 52, respectively, and both the first limiting plate 511 and the second limiting plate 512 are fixedly installed on the second pull rod 510. The diameters of the first limiting plate 511 and the second limiting plate 512 are both larger than the diameter of the through hole 5.

[0052] When the sampling tube 42 comes into contact with the material, the piston block 52 moves upward relative to the negative pressure tube 51. The upper end face of the piston block 52 abuts against the lower end face of the limiting plate 511. As the piston block 52 continues to move upward relative to the negative pressure tube 51, the upper end face of the piston block 52 pushes the limiting plate 511 upward, thereby driving the pull rod 510 upward. Since the pull rod 510 is fixedly installed on the sealing block 56, its upward movement causes the sealing block 56 to move upward, thus connecting the exhaust groove 57 to the negative pressure tube 51 and the sampling bottle 4. When the sampling bottle... 4. After the material is sucked up, the lifting plate 61 rises. At this time, the piston block 52 gradually moves downward relative to the negative pressure pipe 51. When the lower end face of the piston block 52 abuts against the upper end face of the second limiting plate 512, as the piston block 52 continues to descend, the lower end face of the piston block 52 pushes the second limiting plate 512 downward, and then pushes the sealing block 56 to move downward relative to the ring platform 55 through the second pull rod 510. The exhaust groove 57 is sealed again by the inner peripheral wall of the ring platform 55 until the slider 58 is stuck into the second sliding groove again, and the lifting plate 61 is completely reset.

[0053] The specific working principle of this invention embodiment:

[0054] During sampling, the operator first rotates the four rings 24 in sequence to release the pressure of the sleeve 23 on the sealing cap 3. Then, the sealing cap 3 is opened, and the operator pulls the cylindrical plug 43 from the sampling bottle 4. The sampling tube 42 is then installed at the mounting hole at the bottom of the sampling bottle 4. Next, the operator inserts the ring 55 on the negative pressure tube 51 into the sampling bottle 4, thus connecting the negative pressure tube 51 to the sampling bottle 4. Then, the operator inserts the sampling bottle 4 into the sleeve 69. After the sampling bottle 4 is inserted into the sleeve 69, the operator pulls the locking rod 68 towards the negative pressure tube 51, causing the locking block 54 on the pull rod 53 to insert into the groove on the locking rod 68, thus fixing the piston block 52 and the locking rod 68 together. Finally, the operator rotates the lifting plate... The rotating rod 65 on the 61 causes the lower end face of the second locking block 66 on the rotating rod 65 to abut against the upper end face of the negative pressure pipe 51. Then, the motor 62 is started. When the motor 62 rotates in the forward direction, it drives the lead screw 64 to rotate in the forward direction. The forward rotation of the lead screw 64 causes the lifting plate 61 to move downward in the reactor 1. During the descent of the lifting plate 61, since the piston block 52 is fixedly connected to the locking rod 68, the height of the piston block 52 remains unchanged. Since the lower end face of the second locking block 66 abuts against the upper end face of the negative pressure pipe 51, during the descent of the lifting plate 61, the lifting plate 61 drives the negative pressure pipe 51 to move downward through the second locking block 66 on the rotating rod 65. This causes the piston block 52 to move upward relative to the negative pressure pipe 51 within the negative pressure pipe 51. The sampling tube 42 and the material in the reactor 1... Before the material comes into contact, the pressure inside the negative pressure pipe 51 gradually decreases as the piston block 52 moves upward relative to the negative pressure pipe 51. After the sampling pipe 42 comes into contact with the material in the reactor 1, as the lifting plate 61 continues to descend, the piston block 52 moves upward relative to the negative pressure pipe 51 and abuts against the limiting plate 511. As the piston block 52 continues to move upward relative to the negative pressure pipe 51, it pushes the limiting plate 511 upward, which in turn drives the sealing block 56 upward through the pull rod 510. This allows the exhaust groove 57 to connect the negative pressure pipe 51 and the sampling bottle 4. Then, the material in the reactor 1 gradually enters the sampling bottle 4 under the suction of the negative pressure inside the sampling bottle 4. After the sampling bottle 4 has absorbed all the material, the motor 62 reverses... The rotation drives the lifting plate 61 to rise via the lead screw 64. At this time, the piston block 52 gradually moves downward relative to the negative pressure pipe 51. When the piston block 52 abuts against the second limiting plate 512, as the piston block 52 continues to descend relative to the negative pressure pipe 51, the piston block 52 pushes the second limiting plate 512 downward, thereby pushing the sealing block 56 downward relative to the ring platform 55 via the second pull rod 510. The exhaust groove 57 is sealed again by the inner circumferential wall of the ring platform 55 until the slider 58 is locked back into the second sliding groove. The lifting plate 61 is then fully reset. Finally, the operator rotates the rotating rod 65 to remove the second locking block 66 from above the negative pressure pipe 51. Then, the operator moves the moving locking rod 68 away from the negative pressure pipe 51, causing the first locking block 54 to disengage from the groove.The staff then removed sampling bottle 4 from sleeve 2 69, pulled the negative pressure tube 51 off sampling bottle 4, inserted the cylindrical stopper 43 into sampling bottle 4, and finally removed sampling tube 42 from sampling bottle 4, completing the sampling process.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sampling device for a reaction vessel used in chlorination production, comprising a sampling port disposed on the reaction vessel (1) and a sealing cap (3) for sealing the sampling port, characterized in that, Also includes: The sampling bottle (4) is open at the top and closed at the bottom. The bottom of the sampling bottle (4) has a through mounting hole. The sampling bottle (4) is equipped with a feed pipe (41). The lower end of the feed pipe (41) is fixedly installed in the mounting hole. The bottom of the sampling bottle (4) is provided with a sampling pipe (42) extending downwards. The sampling pipe (42) is connected to the feed pipe (41). The negative pressure mechanism (5) includes a negative pressure tube (51) connected to the upper end of the sampling bottle (4), a piston block (52) slidably installed in the negative pressure tube (51) in the vertical direction, and a valve assembly set between the negative pressure tube (51) and the sampling bottle (4). A locking rod (68) is slidably installed on the reactor (1) in the horizontal direction. A pull rod (53) is fixedly installed on the piston block (52). The top end of the pull rod (53) extends beyond the upper end of the negative pressure tube (51). A locking block (54) is provided at the top end of the pull rod (53). A groove adapted to the locking block (54) is provided on the locking rod (68). The valve assembly includes an annular platform (55) fixedly installed in the negative pressure pipe (51), a sealing block (56) slidably installed in the annular platform (55) in the vertical direction, a driving component three for driving the sealing block (56) to move, and a locking component for locking the sealing block (56) and the annular platform (55). The outer circumferential wall of the sealing block (56) is provided with an exhaust groove (57). When the sampling pipe (42) comes into contact with the material, the locking component disconnects the sealing block (56) from the annular platform (55), and the driving component three drives the sealing block (56) to rise in the annular platform (55), so that the exhaust groove (57) connects the negative pressure pipe (51) and the sampling bottle (4). The driving component three includes a pull rod two (510) fixedly installed on the sealing block (56), a through hole five extending vertically through the piston block (52), the pull rod two (510) passing through the through hole five, the top end of the pull rod two (510) extending beyond the upper end of the piston block (52), and a limiting plate one (511) fixedly installed on the top end of the pull rod two (510), and a limiting plate two (512) fixedly installed on the pull rod two (510) below the piston block (52). During the upward movement of the lifting plate (61), the piston block (52) moves downward relative to the negative pressure tube (51) in the negative pressure tube (51), thereby squeezing the air in the negative pressure tube (51) downward. The air entering the sampling bottle (4) from the negative pressure tube (51) will enter the feed tube (41) through the through hole one (46) and finally be discharged from the sampling tube (42). The height of the through hole one (46) on the feed tube (41) is higher than the liquid level of the material in the sampling bottle (4).

2. The sampling device for a reaction vessel used in chlorination production according to claim 1, characterized in that, The locking component includes an elastic telescopic block that is slidably mounted on the sealing block (56) in the horizontal direction. An annular groove is provided on the inner wall of the ring platform (55). In the initial state, the elastic telescopic block is stuck in the annular groove. When the sampling tube (42) comes into contact with the material, the driving component drives the sealing block (56) to move upward relative to the ring platform (55).

3. The sampling device for a reaction vessel used in chlorination production according to claim 1, characterized in that, The lower end of the ring platform (55) extends beyond the lower end of the negative pressure pipe (51), and the outer circumferential surface of the ring platform (55) is made of flexible material.

4. The sampling device for a reaction vessel used in chlorination production according to claim 1, characterized in that, The upper end of the feed pipe (41) is closed, and a through hole (46) is provided on the circumferential wall of the feed pipe (41) that penetrates both inside and outside.

5. A sampling device for a reaction vessel used in chlorination production according to claim 4, characterized in that, A sleeve (44) is fitted on the feed pipe (41), and an elastic element is provided between the sleeve (44) and the feed pipe (41) to make the sleeve (44) located on the upper side of the through hole (46). The sampling device also includes a cylindrical plug (43).

6. A sampling device for a reaction vessel used in chlorination production according to claim 5, characterized in that, The outer circumferential surface of the cylindrical plug (43) is made of flexible material.

7. A sampling device for a reaction vessel used in chlorination production according to claim 1, characterized in that, The sampling device also includes a lifting mechanism (6), which includes a lifting plate (61) set in the sampling port and a driving component for driving the lifting plate (61) to rise and fall. The lifting plate (61) has a through hole (67) that runs vertically through it, and a sleeve (69) is fixedly installed on the lifting plate (61). A rotating rod (65) is rotatably installed on the lifting plate (61), and a locking block (66) is connected to the top of the rotating rod (65).

8. A sampling device for a reaction vessel used in chlorination production according to claim 7, characterized in that, The drive unit includes a motor (62) fixedly mounted on the reactor (1) and a lead screw (64) connected to the output end of the motor (62). The lead screw (64) passes through the lifting plate (61) and is threadedly engaged with the lifting plate (61).

Images