A gas online rapid sampling device and sampling method based on condensation collection principle

Abstract

The present invention belongs to the technical field of chemical equipment, and specifically relates to a gas online rapid sampling device and sampling method based on the principle of condensation collection. The gas online rapid sampling device comprises: a sampling platform, which comprises a sampling pipeline fixedly mounted on the sampling platform and a sampler slidably mounted on the sampling platform and performing feeding / retracting movement in the direction of the sampling pipeline, the sampler is provided with a docking end for docking with the sampling pipeline and a connecting end for connecting the sampling bottle, and when the sampler is fed into place, the docking end is sealed and docked with the sampling pipeline; a cooling structure, which comprises a freezing medium container located below the sampler and a lifting mechanism for adjusting the immersion depth of the sampling bottle immersed in the freezing medium container. The present invention can make the installation and disassembly of the sampler and the adjustment of the freezing medium immersion depth simpler and more convenient, while ensuring that the gas to be sampled does not leak during the entire operation, thereby achieving the purpose of shortening the operation time and improving the accuracy and safety of the operation.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a gas online rapid sampling device and a sampling method based on the condensation material collection principle. Background Art

[0002] In the chemical industry, there is often a need to extract and detect gases in the process system. When the gas can be cooled by a medium such as liquid nitrogen to turn it into a liquid or solid, a gas sampling method based on the principle of condensation collection is often used.

[0003] At present, a known device for gas sampling using the above method requires that a sampling bottle with a stop valve at the end be fixed to the process pipeline through a thread or flange connection, and then the sampling bottle is soaked in a freezing medium to collect the material. By monitoring the pressure change in the process pipeline, the amount of gas taken out can be calculated. The main disadvantages of this method are:

[0004] 1) There are many operating steps to connect the stop valve to the process pipeline, which takes a long time and cannot meet the requirements of reducing operation time and ensuring the safety of operators in special environments.

[0005] 2) When the operating space is limited, the installation quality of the sealed connection between the sampling bottle and the process pipeline cannot be effectively guaranteed, which may easily lead to gas leakage and cause safety accidents.

[0006] 3) The depth of the sampling bottle immersed in liquid nitrogen relies on visual adjustment, and the operational convenience and accuracy also need to be further improved.

[0007] Therefore, it is necessary to design a quick sampling device and sampling method that is simple to operate and safe to use. Summary of the invention

[0008] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a gas online rapid sampling device and sampling method based on the condensation collection principle, which can make the installation and disassembly of the sampler and the adjustment of the immersion depth of the freezing medium simpler and more convenient, while ensuring that the sampled gas does not leak during the entire operation process, thereby achieving the purpose of shortening the operation time and improving the operation accuracy and safety.

[0009] The technical solution adopted by the present invention to solve this problem is:

[0010] A gas online rapid sampling device based on the condensation material collection principle, comprising:

[0011] The sampling platform includes a sampling pipeline fixedly mounted on the sampling platform and a sampler slidably mounted on the sampling platform and moving forward / backward toward the sampling pipeline. The sampler is provided with a docking end for docking with the sampling pipeline and a connecting end for connecting with a sampling bottle. When the sampler is fed into place, the docking end is sealed and docked with the sampling pipeline.

[0012] The cooling structure comprises a freezing medium container located below the sampler and a lifting mechanism for adjusting the immersion depth of the sampling bottle in the freezing medium container.

[0013] Preferably, the central axis of the butt joint end coincides with the central axis of the sampling pipeline, and the butt joint end is formed with a butt joint portion which is plugged and matched with the end flange of the sampling pipeline.

[0014] Further preferably, a gasket is installed at the butt joint portion, and a sealing head is detachably installed at the butt end.

[0015] Further preferably, the connecting end is formed at the lower end of the sampler, the sampling bottle is mounted on the connecting end at the lower end of the sampler through a locking nut, and a sealing gasket is provided between the connecting end and the sampling bottle.

[0016] Further preferably, a valve assembly for controlling the opening and closing of the connecting end is provided in the sampler, and a handle is installed at the upper end of the sampler.

[0017] Further preferably, a crank slider mechanism is installed on the sampling platform, and the crank slider mechanism comprises:

[0018] A slide, which is fixedly mounted on the sampling platform, comprises a support seat and a base connected in one piece, a sampling pipe is fixed on the support seat, and a guide groove is formed on the base along its length direction;

[0019] A slider is slidably connected with the base through a guide groove, the sampler penetrates and is fixedly mounted on the slider, and a groove for avoiding an empty sampling bottle is provided on the base;

[0020] The slider crank is rotatably mounted on a side of the base away from the support seat through a rotating shaft. A slider connecting rod is connected between the slider crank and the slider. One end of the slider connecting rod is hinged to the slider crank, and the other end is hinged to the slider.

[0021] Further preferably, a moving platform is installed at the lower end of the sampling platform, and the moving platform includes a base plate and four columns installed between the sampling platform and the base plate, and a guide structure is slidably mounted on the columns.

[0022] Further preferably, the lifting mechanism is installed on a moving platform, and the lifting mechanism comprises:

[0023] A support plate with a lifting link, which forms a quadrilateral link mechanism, including a support plate and a lifting link assembly, wherein the support plate is connected to the column through a guide structure, and the freezing medium container is fixedly mounted on the support plate;

[0024] The hand wheel is connected to the lifting connecting rod assembly through a transmission shaft, and a ratchet mechanism for one-way braking is provided between the hand wheel and the base plate.

[0025] Further preferably, a limiting mechanism is installed on the bottom plate, and the limiting mechanism includes a positioning pin and a control rod for controlling the extension and retraction of the positioning pin.

[0026] The second invention object of the present invention is to provide a sampling method of a gas online rapid sampling device based on the condensation material collection principle, comprising the following steps:

[0027] S101: Pre-installation

[0028] Install the sampling platform and moving platform at the sampling point of the process system, and fix the sliding table and freezing medium container on them to ensure the sealing connection between the sampling pipeline and the process system;

[0029] S102: Sampler preparation

[0030] Remove the sampler's cover and keep the sampler open;

[0031] S103: Sampler Installation

[0032] By turning the slider crank, the slide table is adjusted to the sampler loading and unloading state, and the sampler is installed on the slide block of the slide table;

[0033] S104: Docking the sampler with the sampling pipeline

[0034] The slider crank is turned, and under the action of the slider connecting rod, the slider drives the sampler to move forward, and finally the gasket on the sampling end of the sampler is pressed by the end flange of the sampling pipeline, so that the sealing connection between the sampler and the sampling pipeline is achieved;

[0035] S105: Sampling operation

[0036] After the sampler and the sampling pipeline are connected, add the freezing medium into the freezing medium container, and gradually turn the hand wheel to lift the support plate, thereby controlling the depth of the sampling bottle immersed in the freezing medium to complete the collection of the gas medium in the current process pipeline;

[0037] S106: Disassembly of the sampler

[0038] After sampling is completed, turn the hand wheel, the support plate drops, and the sampling bottle is separated from the freezing medium. Close the valve assembly of the sampler, then move the slider crank to adjust the slide to the sampler loading and unloading state, and then remove the sampler.

[0039] The advantages and positive effects of the present invention are:

[0040] 1. The present invention can make the installation and disassembly of the sampler and the adjustment of the immersion depth of the freezing medium simpler and more convenient, while ensuring that the gas to be sampled does not leak during the entire operation, thereby achieving the purpose of shortening the operation time and improving the accuracy and safety of the operation.

[0041] 2. The present invention cooperates with the pipeline stop valve control in the chemical system to ensure that the gas to be sampled does not leak during the entire operation process, ensures the safety of the operation, and realizes safe and rapid sampling operation.

[0042] 3. In the present invention, the installation and disassembly of the sampler can be completed only by moving the crank of the slide, which is simple and convenient to operate. At the same time, the elastic force of the pad and the slide size chain design are utilized to make the sampler naturally have an anti-accidental touch function after being installed in place, further ensuring the safety and speed of the operation.

[0043] 4. In the present invention, the lifting mechanism can control the lifting of the freezing medium container relative to the sampler, and the depth of the sampling bottle immersed in the freezing medium can be adjusted, thereby controlling the sampling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0045] Figure 1 It is a structural schematic diagram of the sampler in the present invention in a loading and unloading state;

[0046] Figure 2 yes Figure 1 The main cross-sectional view of

[0047] Figure 3 yes Figure 1 Side view of

[0048] Figure 4 yes Figure 3 A schematic diagram of the structure of the middle limit mechanism in a locked state;

[0049] Figure 5 It is a structural schematic diagram of the sampler on the sampling platform in the loading and unloading state;

[0050] Figure 6 It is a structural schematic diagram of the sampler in the present invention in a docking state;

[0051] Figure 7 yes Figure 6 The main cross-sectional view of

[0052] Figure 8 yes Figure 6 Main view of the sampling platform;

[0053] Fig. 9 yes Figure 8 The front view of the middle crank slider mechanism at the "dead point" position;

[0054] Fig.10 yes Figure 6 A cross-sectional view of the sampling platform;

[0055] Fig.11 yes Figure 6 A top view of the sampling platform;

[0056] Fig.12 It is a schematic diagram of the structure of the sampler;

[0057] Fig.13 is a cross-sectional view of the sampler;

[0058] Fig.14 It is a partial exploded view of the sampler;

[0059] Fig.15 It is the main view of the moving platform;

[0060] Fig.16 is a side view of the moving platform;

[0061] Fig.17 is a top view of the base plate;

[0062] Fig.18 It is the front view of the pallet;

[0063] Fig.19 is a side view of the pallet;

[0064] Fig. 20 is a side view of the limiting mechanism;

[0065] Fig.21 It is a side view of the limit mechanism in a changing state;

[0066] Fig. 22 It is the front view of the limiting mechanism.

[0067] In the figure: 1-sampler, 101-stop valve housing, 102-gasket, 103-sampling bottle, 104-sealing gasket, 105-locking nut, 106-handle, 107-head, 108-valve assembly, 109-butt end, 110-connecting end, 2-slide, 3-moving platform, 301-top plate, 302-bottom plate, 303-column, 304-guide structure, 305-support plate, 306-lifting connecting rod assembly, 307-handwheel, 308-ratchet mechanism, 309-limiting mechanism, 3091-locating pin, 3092-control rod, 4-refrigerating medium container, 5-sampling pipeline, 6-crank slider mechanism, 601-slider crank, 602-slider connecting rod, 603-slider, 604-base, 605-guide groove. DETAILED DESCRIPTION

[0068] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked only in one place in the same drawing.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "screwing" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The present invention is described in detail below with reference to the accompanying drawings.

[0070] Embodiment 1:

[0071] A gas online rapid sampling device based on the condensation material collection principle, a sampling platform, which includes a sampling pipe 5 fixedly mounted on the sampling platform and a sampler 1 slidably mounted on the sampling platform and performing feeding / retracting movements toward the sampling pipe 5, the sampler 1 is provided with a docking end 109 for docking with the sampling pipe 5 and a connecting end 110 for connecting with a sampling bottle 103, when the sampler 1 is fed into place, the docking end 109 is sealed and docked with the sampling pipe 5; a cooling structure, which includes a freezing medium container 4 located below the sampler 1 and a lifting mechanism for adjusting the immersion depth of the sampling bottle 103 immersed in the freezing medium container 4.

[0072] In this embodiment, the sampler 1 is laterally formed with a docking end 109 and vertically formed with a connecting end 110. The sampler 1 has a stop valve function. Preferably, the main structure of the sampler 1 is designed as a rectangular stop valve housing 101. The sampler 1 is provided with a valve assembly 108 for controlling the opening or closing of the connecting end 110. The stop valve housing 101 and the valve assembly 108 together form a stop valve structure. The regular outer surface of the stop valve can be used to complete the installation and fixation of the sampler 1 on the slide 2. In conjunction with the pipeline stop valve control in the chemical system, it can ensure that the gas to be sampled does not leak during the entire operation process, thereby ensuring the safety of the operation.

[0073] During operation, first press the Figure 1 As shown, the sampling platform and the freezing medium container 4 are installed in advance, and the sampling pipeline 5 is sealed and connected with the process system. Then, the sampler 1 is advanced to dock with the sampling pipeline 5, and then the freezing medium is added to the freezing medium container 4. The depth of the sampling bottle 103 immersed in the freezing medium is adjusted by the lifting mechanism to complete the collection of the gas medium in the current process pipeline, thereby realizing a safe and fast sampling operation.

[0074] The gas online rapid sampling device can make the installation and disassembly of the sampler 1 and the adjustment of the immersion depth of the freezing medium simpler and more convenient, while ensuring that the sampled gas does not leak during the entire operation, thereby achieving the purpose of shortening the operation time and improving the operation accuracy and safety.

[0075] Furthermore, in this embodiment, it can be considered that the central axis of the docking end 109 coincides with the central axis of the sampling pipe 5 , and the docking end 109 is formed with a docking interface portion that is plugged and matched with the end flange of the sampling pipe 5 .

[0076] Furthermore, in this embodiment, it can be considered that the docking interface is equipped with a gasket 102, and through the matching design of the size chain between the stop valve and the sampling pipe 5, the gasket can obtain a reasonable compression amount after the sampler 1 is installed in place, such as Figure 12-14As shown, the gasket is sleeved on the docking port. When the sampler 1 is docked in place, the gasket 102 is clamped between the docking end 109 and the end flange of the sampling pipe 5, thereby ensuring the seal between the sampler 1 and the sampling pipe 5.

[0077] Furthermore, in the present embodiment, it can be considered that the docking end 109 is detachably mounted with a sealing head 107 for protecting the docking interface of the sampler 1 after the sampler 1 is removed, and at the same time adding a second seal to prevent gas leakage in the sampler 1.

[0078] Furthermore, in this embodiment, it can be considered that the connection end 110 is formed at the lower end of the sampler 1, and the sampling bottle 103 is installed on the connection end 110 at the lower end of the sampler 1 through a locking nut 105, and a sealing gasket is provided between the connection end 110 and the sampling bottle 103. Figure 12-14 As shown, a sampling bottle 103 is installed at the lower end of the stop valve in the sampler 1, and is sealed and connected to the locking nut 105 through a sealing gasket. The sampling bottle 103 is made of a polymer material with high chemical stability, non-hygroscopicity, and airtightness, which, on the one hand, meets the requirements of low temperature resistance and sealing performance of the sampling bottle 103; on the other hand, after the sampling bottle 103 is immersed in a freezing medium (such as liquid nitrogen), the low thermal conductivity of the material can ensure that the gasket will not fail to seal due to too low a temperature.

[0079] Furthermore, in this embodiment, it can be considered that the sampler 1 is provided with a valve assembly 108 for controlling the opening and closing of the connection end 110, such as Figure 12-14 As shown, the main structure of the sampler 1 is designed as a rectangular structure, in which a functional cavity is formed, and the functional cavity is connected with the channel in the docking end 109 and the channel in the connecting end 110. The valve assembly 108 includes a valve flap installed in the functional cavity and a valve stem that drives the valve flap to be squeezed downward. The valve flap protrudes toward the channel in the connecting end 110. When the valve stem drives the valve flap to be squeezed downward, the connecting end 110 is closed; when the force applied to the valve flap disappears, the valve flap resets upward, and the connecting end 110 is opened.

[0080] Furthermore, in this embodiment, it can be considered that a handle 106 is installed at the upper end of the sampler 1 to increase the distance between the operator's hand and the sampling bottle 103 to ensure safe operation. At the same time, its length design also ensures that the handle does not interfere with the slide 2 and the process pipeline flange during the installation of the sampler 1.

[0081] Furthermore, in this embodiment, it can be considered that the sampling platform is equipped with a crank slider mechanism 6, such as Figure 8-10 As shown, the crank slider mechanism 6 includes:

[0082] The slide 2 is fixedly mounted on the sampling platform, and comprises a support seat and a base 604 which are integrally connected, a sampling pipe 5 is fixed on the support seat, and a guide groove 605 is formed on the base 604 along its length direction;

[0083] The slider 603 is slidably connected with the base through a guide groove, the sampler 1 passes through and is fixedly mounted on the slider, and a clearance groove for avoiding the empty sampling bottle 103 is provided on the base;

[0084] The slider crank 601 is rotatably mounted on a side of the base away from the support seat via a rotating shaft. A slider connecting rod 602 is connected between the slider crank 601 and the slider 603. One end of the slider connecting rod is hinged to the slider crank, and the other end is hinged to the slider.

[0085] In this embodiment, the slide 2 is composed of a slider crank, a slider connecting rod, a slider, a base, and a sampling pipe 5 to form a crank slider mechanism 6, and the rotating shaft is connected by a pin. The size of the slider in the slide 2 is matched with the sampler 1 to ensure the stable installation of the sampler 1. The slider crank, the slider connecting rod and the slider are connected in sequence, and the slide 2 can be moved along the guide groove on the base by moving the slider crank. The process pipeline (sampling pipeline 5) in the slide 2 is installed on the base, and the accurate control of the size chain between it and the slide 2 can be achieved by adjusting the gasket, so as to ensure that when the sampler 1 is docked with the process pipeline, the gasket at the interface obtains a reasonable amount of compression, and the sealing performance is reliable. The installation and disassembly of the sampler 1 can be completed by moving the crank of the slide 2, which can be simple and convenient to operate. At the same time, the gasket elasticity and the size chain design of the slide 2 are used to make the sampler 1 naturally have an anti-mistouch function after being installed in place, which further ensures the safety and speed of operation.

[0086] It should be noted that the crank slider mechanism 6 in the slide 2 has specific size parameters, so that in the process of moving the slider crank to complete the docking of the sampler 1 with the process pipeline, it is necessary to first pass through the "dead point" position. The advantage of this design is that when the sampler 1 is installed in place, even if the slider crank is accidentally touched, the mechanism can still rely on the rebound effect of the gasket at the interface of the sampler 1 to quickly restore the mechanism to the state where the sampler 1 is installed in place, and it can ensure that the compression of the gasket does not decrease during the whole process, effectively realizing the function of preventing accidental touch.

[0087] Furthermore, in this embodiment, it can be considered that Figure 15-16 As shown, a moving platform 3 is installed at the lower end of the sampling platform, and the moving platform 3 includes a base plate 302 and four columns 303 installed between the sampling platform and the base plate 302. A guide structure 304 is slidably mounted on the column 303. Preferably, the guide structure 304 is a guide sleeve.

[0088] Furthermore, in this embodiment, it can be considered that the lifting mechanism is installed on the moving platform 3, and the lifting mechanism includes:

[0089] A support plate with a lifting link, which forms a quadrilateral link mechanism, including a support plate 305 and a lifting link assembly 306, wherein the support plate 305 is connected to the column 303 through a guide structure 304, and the freezing medium container 4 is fixedly mounted on the support plate 305;

[0090] The hand wheel 307 is connected to the lifting link assembly 306 via a transmission shaft, and a ratchet mechanism 308 for one-way braking is provided between the hand wheel 307 and the base plate 302 .

[0091] A limiting mechanism 309 is installed on the bottom plate 302 , and the limiting mechanism 309 includes a positioning pin 3091 and a control rod 3092 for controlling the extension and retraction of the positioning pin 3091 .

[0092] In this embodiment, Figure 1-11 As shown in 15-22, the gas online rapid sampling device mainly includes a sampler 1, a sampling platform, a slide 2, a moving platform 3 and a freezing medium container 4. The moving platform 3 is installed at the lower end of the sampling platform (the sampling platform can also be called the top plate 301), and is composed of a bottom plate 302, a column 303 with a guide structure 304, a support plate with a lifting connecting rod, a handwheel 307, a ratchet mechanism 308 and a limit mechanism 309. The top plate 301 is used to fix the slide 2. The four columns 303 installed on the bottom plate 302 support the top plate 301 and the slide 2, and are connected to the support plate 305 through the guide structure 304, playing the role of a sliding guide rail. The lifting connecting rod assembly 306 includes a plurality of hinged connecting rods, so that the support plate 305 with the lifting connecting rod constitutes a quadrilateral connecting rod mechanism, which is connected to the handwheel 307 by a transmission shaft. A ratchet mechanism 308 is provided between the hand wheel 307 and the bottom plate 302 for one-way braking. The ratchet mechanism 308 includes a ratchet, a pawl, a pawl pin, and a pawl torsion spring. The lifting and lowering of the support plate 305 can be controlled by rotating the hand wheel 307 in one direction. The limit mechanism 309 of the moving platform 3 is a small crank slider mechanism 6. The control rod 3092 of the limit mechanism 309 can control the extension and retraction of the positioning pin 3091, thereby cooperating with the lifting connecting rod assembly and the ratchet mechanism to achieve locking of the support plate 305 at the maximum height position. When the height of the support plate 305 needs to be lowered, the locking state can be released by simply toggling the control rod 3092 in the opposite direction.

[0093] Furthermore, in this embodiment, it can be considered that the freezing medium container 4 is a rectangular parallelepiped structure, fixed on the support plate 305 of the moving platform 3. It is used to contain the freezing medium. The height of the container is coordinated with the sampler 1 to ensure that a part of the sampling bottle 103 can be immersed in the freezing medium, and the immersion depth can be controlled by adjusting the height of the support plate 305. The lifting mechanism can control the lifting of the freezing medium container 4 relative to the sampler 1, and the depth of the sampling bottle 103 immersed in the freezing medium can be adjusted, thereby controlling the sampling speed.

[0094] Embodiment 2:

[0095] A sampling method of a gas online rapid sampling device based on the condensation material collection principle comprises the following steps:

[0096] S101: Pre-installation

[0097] Press at the sampling point in the process system Figure 1 As shown, the sampling platform and the moving platform 3 are installed in advance, and the slide 2 and the freezing medium container 4 are fixed thereon to ensure that the sampling pipeline 5 is sealed and connected with the process system;

[0098] S102: Sampler preparation

[0099] Remove the cover of sampler 1 and open the stop valve;

[0100] S103: Sampler Installation

[0101] By turning the slider crank, the slide table 2 is adjusted to the sampler 1 loading and unloading state, and the sampler 1 is installed on the slide table 2;

[0102] S104: Docking the sampler with the sampling pipeline

[0103] The slider crank is turned, and under the action of the slider connecting rod, the slider drives the sampler 1 to move forward, and finally the gasket on the sampling end of the sampler 1 is pressed by the end flange of the sampling pipe 5, so that the sampler 1 and the sampling pipe 5 are sealed. At the same time, if the slider crank is accidentally touched at this time, the gasket at the end of the stop valve will also provide a certain elastic force, so that the sampler 1 and the sampling pipe 5 always maintain a sealed connection state;

[0104] S105: Sampling operation

[0105] After the sampler 1 is docked with the sampling pipeline 5, the freezing medium is added to the freezing medium container 4, and the hand wheel 307 of the platform 3 is gradually turned to lift the support plate 305, thereby controlling the depth of the sampling bottle 103 immersed in the freezing medium to complete the collection of the gas medium in the current process pipeline; when the support plate 305 is lifted to the highest point, the control rod of the positioning pin mechanism can be toggled to achieve position locking;

[0106] S106: Disassembly of the sampler

[0107] After sampling is completed, continue to turn the hand wheel 307 of the moving platform 3, the support plate 305 descends, and the sampling bottle 103 is separated from the freezing medium. Close the valve assembly 108 of the sampler 1, then move the slider crank, adjust the slide 2 to the sampler 1 loading and unloading state, and then remove the sampler 1. If necessary, the end cap can be installed at the end of the sampler 1 to provide a second seal for the gas medium in the sampler 1. At this point, the gas medium in the process pipeline has been extracted into the sampler 1.

[0108] The present invention can make the installation and disassembly of the sampler and the adjustment of the immersion depth of the freezing medium simpler and more convenient, while ensuring that the gas to be sampled does not leak during the entire operation process, thereby achieving the purpose of shortening the operation time and improving the operation accuracy and safety.

[0109] It should be noted that the technical solution of the present invention solves a technical problem that has been long desired to be solved in the field of this project but has never been successfully solved. The sampling device and sampling method have been put into use in a certain test system. So far, no safety accidents or mechanical failures of the sampling device have occurred, and safe and fast sampling operations have been achieved.

[0110] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A gas online rapid sampling device based on the condensation collection principle, Features: include: A sampling platform, comprising a sampling pipe (5) fixedly mounted on the sampling platform and a sampler (1) slidably mounted on the sampling platform and capable of advancing / retreating in the direction of the sampling pipe (5), wherein the sampler (1) is provided with a docking end (109) for docking with the sampling pipe (5) and a connecting end (110) for connecting with a sampling bottle (103); when the sampler (1) is fed into place, the docking end (109) is sealed and docked with the sampling pipe (5); A cooling structure comprising a freezing medium container (4) located below the sampler (1) and a lifting mechanism for adjusting the immersion depth of the sampling bottle (103) in the freezing medium container (4); A crank slider mechanism (6) is installed on the sampling platform, and the crank slider mechanism (6) comprises: A slide (2) is fixedly mounted on the sampling platform, comprising a support seat and a base (604) connected in one piece, a sampling pipe (5) is fixed on the support seat, and a guide groove (605) is formed on the base (604) along its length direction; The slider (603) is slidably connected to the base (604) via a guide groove (605), the sampler (1) passes through and is fixedly mounted on the slider (603), and the base (604) is provided with a groove for avoiding the empty sampling bottle (103); A slider crank (601) is rotatably mounted on a side of the base (604) away from the support seat via a rotating shaft, a slider connecting rod (602) is connected between the slider crank (601) and the slider (603), one end of the slider connecting rod (602) is hinged to the slider crank (601), and the other end is hinged to the slider (603); The sampler (1) is provided with a valve assembly (108) for controlling the opening and closing of the connecting end (110). The main structure of the sampler (1) is designed as a rectangular parallelepiped structure, in which a functional cavity is formed. The functional cavity is connected with the channel in the docking end (109) and the channel in the connecting end (110). The valve assembly (108) includes a valve flap installed in the functional cavity and a valve stem that drives the valve flap to be squeezed downward. The valve flap protrudes toward the channel in the connecting end (110). When the valve stem drives the valve flap to be squeezed downward, the connecting end (110) is closed; when the force applied to the valve flap disappears, the valve flap resets upward, and the connecting end (110) is opened.

2. According to claim 1, a gas online rapid sampling device based on the condensation material collection principle, Features: The central axis of the butt joint end (109) coincides with the central axis of the sampling pipe (5), and the butt joint end (109) is formed with a butt joint portion that is plugged and matched with the sampling pipe (5).

3. A gas online rapid sampling device based on the condensation material collection principle according to claim 2, Features: The butt joint portion is provided with a gasket (102), and the butt end (109) is provided with a detachable sealing head (107).

4. According to claim 2, a gas online rapid sampling device based on the condensation material collection principle, Features: The sampling bottle is mounted on a connecting end (110) at the lower end of the sampler (1) via a locking nut (105), and a sealing gasket (104) is provided between the connecting end (110) and the sampling bottle.

5. According to claim 2, a gas online rapid sampling device based on the condensation material collection principle, Features: A handle (106) is installed at the upper end of the sampler (1).

6. A gas online rapid sampling device based on the condensation material collection principle according to claim 1, Features: A moving platform (3) is installed at the lower end of the sampling platform. The moving platform (3) comprises a base plate (302) and four columns (303) installed between the sampling platform and the base plate (302). A guide structure (304) is slidably mounted on the columns (303).

7. A gas online rapid sampling device based on the condensation material collection principle according to claim 6, Features: The lifting mechanism is installed on the moving platform (3), and the lifting mechanism comprises: A support plate with a lifting connecting rod, which forms a quadrilateral connecting rod mechanism, comprising a support plate (305) and a lifting connecting rod assembly (306), wherein the support plate (305) is connected to a column (303) via a guide structure (304), and the freezing medium container (4) is fixedly mounted on the support plate (305); A hand wheel (307) is connected to the lifting connecting rod assembly (306) via a transmission shaft, and a ratchet mechanism (308) for one-way braking is provided between the hand wheel (307) and the base plate (302).

8. A gas online rapid sampling device based on the condensation material collection principle according to claim 7, Features: A limiting mechanism (309) is installed on the bottom plate (302), and the limiting mechanism (309) comprises a positioning pin (3091) and a control rod (3092) for controlling the extension and retraction of the positioning pin.

9. A gas online rapid sampling device based on the condensation material collection principle according to any one of claims 1 to 8, using a sampling method of a gas online rapid sampling device based on the condensation material collection principle, Features: The following steps are involved: S101: Pre-installation A sampling platform and a moving platform (3) are installed at the sampling point of the process system, and a sliding platform (2) and a freezing medium container (4) are fixed thereon to ensure that the sampling pipeline (5) is sealed and connected to the process system; S102: Sampler preparation Remove the cover of the sampler (1) and put the sampler (1) into an open state; S103: Sampler Installation By turning the slider crank (601), the slide table (2) is adjusted to a state for loading and unloading the sampler (1), and the sampler (1) is installed on the slide table (2); S104: Docking the sampler with the sampling pipeline The slider crank (601) is turned, and under the action of the slider connecting rod, the slider drives the sampler (1) to move forward, and finally the gasket on the sampling end of the sampler (1) is pressed by the end flange of the sampling pipe (5), thereby achieving a sealed connection between the sampler (1) and the sampling pipe (5); S105: Sampling operation After the sampler (1) and the sampling pipeline (5) are docked, the freezing medium is added to the freezing medium container (4), and the hand wheel (307) is gradually turned to lift the support plate (305), thereby controlling the depth of the sampling bottle immersed in the freezing medium, and completing the collection of the gas medium in the current process pipeline; S106: Disassembly of the sampler After sampling is completed, the hand wheel (307) is turned, the support plate (305) is lowered, the sampling bottle (103) is separated from the freezing medium, the valve assembly of the sampler (1) is closed, and then the slider crank (601) is moved to adjust the slide (2) to the sampler (1) loading and unloading state, and the sampler (1) can be removed.

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