Gas sampling device for chemical safety

Abstract

The invention discloses a gas sampling device for chemical safety, and relates to the technical field of gas sampling, the gas sampling device comprises a bottom supporting plate, side connecting plates are fixedly mounted on the two sides of the outer surface of the bottom supporting plate, and supporting seats are fixedly mounted at the bottoms of the side connecting plates; the stable pipe supporting frame is used for limiting and preventing a chemical gas guiding and conveying pipe, one side of the outer surface of the stable pipe supporting frame is sleeved with a side sealing cover, and the surface of the side, away from the side sealing cover, of the stable pipe supporting frame is sleeved with a protective sealing cover. According to the gas sampling device for chemical safety, after a valve of a gas storage tank is opened by a worker, chemical gas enters a bottom cavity along a connecting pipe, and at the moment, gas flow affects a shaking guide piece, so that the shaking guide piece shakes, and the flowability of the gas in the bottom cavity is accelerated when the gas passes through the shaking guide piece and is conveyed into a bent pipe; and the disc-shaped shaking guide piece is arranged at the bottom end of the bent pipe, and part of impurities in the chemical gas are blocked and adsorbed, so that the purity of the sampled gas is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas sampling, in particular to a gas sampling device for chemical safety. Background Art

[0002] Industrial gas sampling is mainly to obtain representative gas samples for analyzing gas composition, purity, impurity content and other chemical properties. This is extremely important for quality control, environmental monitoring and safety assessment of chemical production processes. For example, in the production process of synthetic ammonia, it is necessary to regularly sample and analyze the ammonia generated by the reaction and the unreacted raw gas (such as nitrogen and hydrogen) to ensure reaction efficiency and product quality.

[0003] Gas sampling devices are essential devices for chemical plants. The sampling objects are gases produced by chemical production. The sampling devices are installed near the pipelines where these gases are transported or discharged, which facilitates regular sampling of the pipelines, thereby monitoring gas leaks and the extent of leaks. In the chemical production process, sampling and analysis of various process gases is crucial. However, there are many problems with current gas sampling devices. Traditional sampling devices lack sufficient safety protection measures when facing flammable, explosive, toxic and harmful gases, which can easily cause explosions, poisoning and other accidents. Summary of the invention

[0004] To achieve the above purpose, the present invention is implemented by the following technical solutions: The present invention is implemented by the following technical solutions: A gas sampling device for chemical safety, comprising a bottom support plate, side connecting plates are fixedly installed on both sides of the outer surface of the bottom support plate, and a support seat is fixedly installed on the bottom of the side connecting plate; A stable pipe support rack, which is used for limiting the position of chemical gas conveying pipes. A side sealing cover is sleeved on one side of the outer surface of the stable pipe support rack, and a protective sealing cover is sleeved on the surface of the stable pipe support rack away from the side sealing cover, and the side sealing cover is fixedly connected to the protective sealing cover; A sampling assembly, which is used for extracting and transporting chemical gases; A gas collecting chamber group, which is used for mixing and collecting chemical gases, and a connecting pipe is fixedly installed on the outer surface of the gas collecting chamber group; The gas collecting chamber group is fixedly installed in the middle of the top of the bottom support plate, and the stable support pipe rack is fixedly installed on the top of the gas collecting chamber group through a protective sealing cover. There are two groups of stable support pipe racks, and the two groups of stable support pipe racks are vertically cross-arranged on the surface of the sampling component, and the sampling component is fixedly installed inside the stable support pipe rack; before sampling the chemical gas, the staff first connects the sampling bottle with the control valve to the outlet pipe, and connects the connecting pipe to the gas storage tank. At this time, the staff opens the valve of the gas storage tank, so that the chemical gas in the gas storage tank enters the interior of the gas collecting chamber group through the connecting pipe. At the same time, the staff pulls the limiting circular plate so that the pull rod drives the sealing plug to slide in the extraction guide to guide the gas into the outlet pipe, so that the sliding gas is injected into the sampling bottle along the outlet pipe, and the valve of the sampling bottle is closed to complete the gas sampling.

[0005] The gas collecting chamber group includes a bottom chamber, which is fixedly installed in the middle of the top of the bottom support plate. A circular groove is opened on the top of the bottom chamber, which is compatible with the sampling assembly. The bottom chamber is provided with a connecting ring through the circular groove, and the connecting ring is fixedly connected to the bottom of the sampling assembly. A support rod is fixedly installed inside the connecting ring, and a shaking guide is fixedly installed at the axis of the support rod. After the staff opens the valve of the gas storage tank, the chemical gas enters the bottom chamber along the connecting pipe. At this time, the gas flow affects the shaking guide, causing the shaking guide to shake, so as to accelerate the gas flow in the bottom chamber when the gas passes through the shaking guide to be transported into the bent pipe, and the disc-shaped shaking guide is set at the bottom of the bent pipe to block and adsorb some impurities in the chemical gas to improve the purity of the sampled gas.

[0006] Preferably, the shaking guide includes a round block, which is fixedly installed in the middle of the outer surface of the support rod. An elastic belt is arranged inside the round block. There are six elastic belts, which are distributed in a circle inside the round block. The elastic belts penetrate the round block and extend to the top of the round block. A connecting disc is fixedly installed on the top of the elastic belt.

[0007] Preferably, an adsorption block is fixedly installed at the bottom of the elastic belt, a spring is fixedly installed on the outer surface of the adsorption block, a limit plate is arranged on the outer surface of the adsorption block, and the adsorption block is slidably adapted to the limit plate through the spring. When gas is infused into the bottom cavity, the flowing gas blows the elastic belt, so that the elastic belt drives the adsorption block and the limit plate to shake with the swing of the elastic belt. At this time, the adsorption block slides in the limit plate under the influence of the swing inertia and squeezes the spring, thereby improving the fluidity of the gas at the bottom end of the elbow. The adsorption block is set to be made of activated carbon. When the gas passes through the shaking guide and is injected into the elbow, the disc-shaped limit plate limits the gas flow path. At this time, part of the gas contacts the adsorption block when injected into the elbow, and the impurities in the gas are adsorbed.

[0008] Preferably, the sampling assembly includes a curved pipe, and the curved pipe is provided with two groups, and the tops of the two groups of curved pipes are provided with air guide holes, and the outer surface of the curved pipe near the air guide hole is sleeved with an extraction air guide, and the top of the extraction air guide is fixedly installed with a guide pipe, and the guide pipe passes through the side sealing cover and extends to the outside thereof, and the bottom of the curved pipe passes through the bottom cavity and extends to the inside of the cavity, and the connecting ring is fixedly installed at the bottom of the curved pipe. Gas enters the curved pipe through the bottom cavity, and the staff pulls the limiting circular plate so that the limiting circular plate drives the drawing rod and the sealing plug to slide and displace in the extraction air guide, so that the sealing plug slides to the outside of the extraction air guide, and the curved pipe is connected with the extraction air guide to guide the gas into the guide pipe, and the sealing ring is affected by the sealing plug pulled outward, and is displaced to one side of the limiting ring and slides on the inner wall of the curved pipe, so as to avoid gas leakage in the curved pipe after the sealing plug is removed from the extraction air guide, causing an explosion.

[0009] Preferably, a limiting ring is fixedly installed at the end of the curved tube near the side sealing cover, the inner sliding part of the limiting ring is fitted with a pull-out rod, the end of the pull-out rod near the extraction air guide is fixedly installed with a sealing plug, the other end of the pull-out rod is fixedly installed with a limiting circular plate, the pull-out rod includes a surface slidingly fitted with a sealing ring on one side of the limiting circular plate, the sealing ring is frictionally fitted with the inner wall of the curved tube, and the sealing plug is frictionally fitted with the inner wall of the extraction air guide. When the sealing plug drives the sealing ring away from the extraction air guide, the volume of the cavity formed between the sealing ring and the curved tube increases, so that the gas flow rate decreases, on the contrary, when the distance between the sealing ring and the curved tube is closer, the gas flow rate increases, so that the staff can adjust the flow rate of the gas from the sampling.

[0010] Preferably, the extraction air guide comprises an outer cover, the outer cover is sleeved on the outer surface of the curved pipe, a connecting hole is opened in the middle of the top of the outer cover, the connecting hole is fixedly connected to the outlet pipe, and the connecting hole is connected to the air guide hole. After the sealing plug slides in the inner guide shaft and moves out of the air guide pipe, the gas in the curved pipe first enters the annular air guide cavity along the guide hole set in the air guide pipe, and then is transported to the outlet pipe through the connecting hole. Since the aperture of the guide hole is small, the flow and transportation of the gas is accelerated when passing through the guide hole, so that the gas contacts the solid adsorbent in the annular air guide cavity, thereby adsorbing and removing impurities in the gas. At the same time, multiple sampling cavities improve the sealing of gas sampling, avoiding the discharge of excess gas induced after gas sampling into the air.

[0011] Preferably, an air guide tube is provided inside the outer cover, a guide hole is opened inside the air guide tube, an inner guide shaft is fixedly installed on the inner wall of the air guide tube, a circular ring is sleeved on the outer surface of the inner guide shaft, and an inner-adhering inclined pad is fixedly installed on the surface of the inner guide shaft away from the circular ring. The inner-adhering inclined pad fits snugly with the inner wall of the curved pipe, so that the sealing plug can slide and displace inside the sealing plug, thereby limiting the position of the sealing plug.

[0012] Preferably, the inner inclined pad and the air guide tube are both fixedly connected to the inner wall of the curved pipe, and the inner inclined pad and the air guide tube assembly are provided with an air guide cavity, which is connected with the connecting hole through the air guide hole.

[0013] Preferably, the stable pipe support frame includes a positioning frame, and the positioning frame is provided with two groups, and the two groups of positioning frames are arranged in a vertical cross shape. A clamping block is fixedly installed on the surface of the positioning frame, and the clamping block is symmetrically arranged with the positioning frame as the center, and an arc ring is clamped inside the clamping block. The positioning frame is set at both ends of the bent pipe through the arc ring sleeve, and the two positioning frames are arranged vertically and crosswise to limit the bent pipe, so as to improve the stability of the bent pipe.

[0014] Preferably, the arc rings are provided in two groups, and the tops of the two groups of arc rings are fixedly installed with limit strips, and connecting rods are fixedly installed between the opposite surfaces of the arc rings. The arc rings are all arranged on the outer surface of the curved pipe, and the arc rings are arranged on the two ends of the outer surface of the curved pipe through vertical cross-arrangement on the positioning frame sleeve. After the gas sampling is completed, the staff closes the valves of the sampling tube and the gas storage tank, and pushes the limit circular plate to drive the sealing ring and the sealing plug to move and reset with the pulling rod, so that the sealing ring and the sealing plug seal the extraction gas guide, and seal the residual gas in the bottom cavity to prevent gas leakage.

[0015] The present invention provides a gas sampling device for chemical safety, which has the following beneficial effects: 1. The gas sampling device for chemical safety, after the staff opens the valve of the gas storage tank, the chemical gas enters the bottom cavity along the connecting pipe. At this time, the gas flow affects the shaking guide, causing the shaking guide to shake, so as to accelerate the gas flow in the bottom cavity when the gas passes through the shaking guide to be transported into the bent pipe, and the disc-shaped shaking guide is set at the bottom end of the bent pipe to block and adsorb some impurities in the chemical gas to improve the purity of the sampled gas.

[0016] 2. The gas sampling device for chemical safety, when the gas is injected into the bottom cavity, the flowing gas blows the elastic belt, so that the elastic belt drives the adsorption block and the limit plate to shake with the swing of the elastic belt. At this time, the adsorption block slides in the limit plate due to the inertia of the swing, and squeezes the spring, thereby improving the fluidity of the gas at the bottom end of the elbow. The adsorption block is set to be made of activated carbon. When the gas passes through the shaking guide and is injected into the elbow, the disc-shaped limit plate limits the gas flow path. At this time, part of the gas contacts the adsorption block when injected into the elbow, and the impurities in the gas are adsorbed.

[0017] 3. The gas sampling device for chemical safety allows gas to enter the bent pipe through the bottom cavity. The staff pulls the limiting circular plate, so that the limiting circular plate drives the pull rod and the sealing plug to slide and displace in the extraction gas guide, so that the sealing plug slides to the outside of the extraction gas guide. At this time, the bent pipe is connected to the extraction gas guide to guide the gas to the outlet pipe. At this time, the sealing ring is affected by the sealing plug pulled outward, displaced to one side of the limiting ring and slides on the inner wall of the bent pipe to avoid gas leakage in the bent pipe after the sealing plug moves out of the extraction gas guide and causes an explosion. When the sealing plug drives the sealing ring away from the extraction gas guide, the volume of the cavity formed between the sealing ring and the bent pipe increases, which reduces the gas flow rate. On the contrary, when the distance between the sealing ring and the bent pipe is closer, the gas flow rate increases, so that the staff can adjust the gas flow rate when sampling.

[0018] 4. The gas sampling device for chemical safety, after the sealing plug slides in the inner guide shaft and is moved out of the air guide tube, the gas in the bent tube first enters the annular air guide cavity along the guide hole set in the air guide tube, and then is transported to the outlet tube through the connecting hole. Since the guide hole has a small aperture, the flow and transportation of the gas is accelerated when passing through the guide hole, so that the gas contacts the solid adsorbent in the annular air guide cavity, thereby adsorbing and removing impurities in the gas. At the same time, multiple sampling cavities improve the sealing of gas sampling, avoiding the discharge of excess gas induced after gas sampling is completed into the air.

[0019] 5. After the gas sampling is completed, the staff closes the valves of the sampling tube and the gas storage tank, and pushes the limit circular plate to drive the sealing ring and the sealing plug to move and reset along with the pull rod, so that the sealing ring and the sealing plug can seal the extraction gas guide and seal the residual gas in the bottom cavity to avoid gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of a gas sampling device for chemical safety of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the protective sealing cover of the present invention; Figure 3 This is a schematic diagram of the connection structure between the stable pipe support and the sampling assembly of the present invention; Figure 4 This is a schematic diagram of the connection structure of the stable pipe support frame and the sampling assembly at another angle of the present invention; Figure 5 This is a schematic diagram of the structure of the sampling assembly of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the sampling assembly of the present invention; Figure 7 This is a schematic diagram of the structure of the air extraction guide member of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the gas collecting cavity group of the present invention; Fig. 9 It is a schematic diagram of the enlarged structure of the shaking guide of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the shaking guide of the present invention.

[0021] In the figure: 1, bottom support plate; 2, protective sealing cover; 3, stable support pipe frame; 31, positioning frame; 32, connecting rod; 33, limit strip; 34, arc ring; 35, clamping block; 4, side connecting plate; 5, gas collecting chamber group; 51, connecting ring; 52, shaking guide; 521, limit plate; 522, elastic belt; 523, round block; 524, connecting disc; 525, adsorption block; 526, spring; 53, bottom cavity; 54, support rod; 6, support Support seat; 7, sampling assembly; 71, outlet tube; 72, limiting circular plate; 73, bent pipe; 74, air guide hole; 75, limiting ring; 76, extraction air guide part; 761, outer cover; 762, air guide tube; 763, inner tilt pad; 764, inner guide shaft; 765, guide hole; 766, circular ring; 767, connecting hole; 768, air guide cavity; 77, pull rod; 78, sealing plug; 79, sealing ring; 8, connecting tube; 9, side sealing cover. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0023] The first embodiment, as Figures 1 to 3 As shown, the present invention provides a technical solution: a gas sampling device for chemical safety, comprising a bottom support plate 1, side connecting plates 4 are fixedly installed on both sides of the outer surface of the bottom support plate 1, and a support seat 6 is fixedly installed on the bottom of the side connecting plate 4; A stable pipe support frame 3 is used for limiting the position of the chemical gas guide pipe. A side sealing cover 9 is sleeved on one side of the outer surface of the stable pipe support frame 3. A protective sealing cover 2 is sleeved on the surface of the stable pipe support frame 3 away from the side sealing cover 9, and the side sealing cover 9 is fixedly connected to the protective sealing cover 2. A sampling component 7, which is used for extracting and transporting chemical gases; A gas collecting chamber group 5, which is used for mixing and collecting chemical gases, and a connecting pipe 8 is fixedly installed on the outer surface of the gas collecting chamber group 5; The gas collecting chamber group 5 is fixedly installed in the middle of the top of the bottom support plate 1, and the stable support pipe rack 3 is fixedly installed on the top of the gas collecting chamber group 5 through the protective sealing cover 2. There are two groups of stable support pipe racks 3, and the two groups of stable support pipe racks 3 are vertically cross-arranged on the surface of the sampling component 7, and the sampling component 7 is fixedly installed inside the stable support pipe rack 3; before sampling the chemical gas, the staff first connects the sampling bottle with the control valve to the outlet pipe 71, and connects the connecting pipe 8 to the gas storage tank. At this time, the staff opens the valve of the gas storage tank, so that the chemical gas in the gas storage tank enters the interior of the gas collecting chamber group 5 through the connecting pipe 8. At the same time, the staff pulls the limiting circular plate 72 so that the pull rod 77 drives the sealing plug 78 to slide in the extraction guide 76 to guide the gas into the outlet pipe 71, so that the sliding gas is injected into the sampling bottle along the outlet pipe 71, and the sampling bottle valve is closed to complete the gas sampling.

[0024] The stable pipe support frame 3 includes a positioning frame 31, and two groups of positioning frames 31 are provided, and the two groups of positioning frames 31 are arranged in a vertical cross shape. A clamping block 35 is fixedly installed on the surface of the positioning frame 31, and the clamping block 35 is symmetrically arranged with the positioning frame 31 as the center. The inside of the clamping block 35 is clamped with an arc ring 34. The positioning frame 31 is sleeved on both ends of the curved pipe 73 through the arc ring 34. The two positioning frames 31 are arranged vertically and crosswise to limit the curved pipe 73, so as to improve the stability of the curved pipe 73.

[0025] There are two groups of arc rings 34, and the tops of the two groups of arc rings 34 are fixedly installed with limit strips 33, and connecting rods 32 are fixedly installed between the opposite surfaces of the arc rings 34. The arc rings 34 are all arranged on the outer surface of the curved pipe 73, and the arc rings 34 are arranged on the two ends of the outer surface of the curved pipe 73 through vertical cross-arrangement of the positioning frame 31. After the gas sampling is completed, the staff closes the valves of the sampling tube and the gas storage tank, and pushes the limit circular plate 72 to drive the sealing ring 79 and the sealing plug 78 to move and reset with the pull rod 77, so that the sealing ring 79 and the sealing plug 78 seal the extraction guide 76, and seal the residual gas in the bottom cavity 53 to prevent gas leakage.

[0026] The second embodiment is based on the first embodiment. Figures 4 to 7As shown, the sampling assembly 7 includes a curved pipe 73, and two groups of curved pipes 73 are provided. Air guide holes 74 are opened on the tops of the two groups of curved pipes 73. The outer surface of the curved pipe 73 close to the air guide holes 74 is sleeved with an extraction air guide member 76. A guide pipe 71 is fixedly installed on the top of the extraction air guide member 76. The guide pipe 71 passes through the side sealing cover 9 and extends to the outside thereof. The bottom of the curved pipe 73 passes through the bottom cavity 53 and extends to the inside of the cavity. The connecting ring 51 is fixedly installed on the bottom of the curved pipe 73. The gas enters the bent pipe 73 through the bottom cavity 53, and the staff pulls the limiting circular plate 72, so that the limiting circular plate 72 drives the pulling rod 77 and the sealing plug 78 to slide and displace in the extraction air guide 76, so that the sealing plug 78 slides to the outside of the extraction air guide 76. At this time, the bent pipe 73 is connected to the extraction air guide 76 to guide the gas to the outlet pipe 71. At this time, the sealing ring 79 is affected by the sealing plug 78 pulled outward, displaced to the side of the limiting ring 75 and slid on the inner wall of the bent pipe 73 to avoid gas leakage in the bent pipe 73 after the sealing plug 78 moves out of the extraction air guide 76 and causes an explosion.

[0027] A limit ring 75 is fixedly installed at the end of the curved tube 73 near the side sealing cover 9, and a pull rod 77 is slidably adapted inside the limit ring 75. A sealing plug 78 is fixedly installed at one end of the pull rod 77 near the extraction gas guide 76, and a limit circular plate 72 is fixedly installed at the other end of the pull rod 77. The pull rod 77 includes a sealing ring 79 slidably adapted on the surface of one side of the limit circular plate 72. The sealing ring 79 is frictionally adapted with the inner wall of the curved tube 73, and the sealing plug 78 is frictionally adapted with the inner wall of the extraction gas guide 76. When the sealing plug 78 drives the sealing ring 79 away from the extraction gas guide 76, the volume of the cavity formed between the sealing ring 79 and the curved tube 73 increases, so that the gas flow speed is reduced. On the contrary, when the distance between the sealing ring 79 and the curved tube 73 is close, the gas flow speed is accelerated, so that the staff can adjust the flow rate of the gas when sampling.

[0028] The extraction air guide 76 includes an outer cover 761, which is sleeved on the outer surface of the curved tube 73. A connection hole 767 is opened in the middle of the top of the outer cover 761. The connection hole 767 is fixedly connected to the outlet tube 71, and the connection hole 767 is connected to the air guide hole 74. After the sealing plug 78 slides in the inner guide shaft 764 and moves out of the air guide tube 762, the gas in the curved tube 73 first enters the annular air guide cavity 768 along the guide hole 765 set in the air guide tube 762, and then is transported to the outlet tube 71 through the connection hole 767. Since the aperture of the guide hole 765 is small, the flow and transportation of the gas is accelerated when passing through the guide hole 765, so that the gas contacts the solid adsorbent in the annular air guide cavity 768, thereby adsorbing and removing impurities in the gas. At the same time, multiple sampling cavities improve the sealing of gas sampling, and prevent the excess gas induced after the gas sampling is completed from being discharged into the air.

[0029] An air guide tube 762 is provided inside the outer cover 761, a guide hole 765 is provided inside the air guide tube 762, an inner guide shaft 764 is fixedly installed on the inner wall of the air guide tube 762, a circular ring 766 is sleeved on the outer surface of the inner guide shaft 764, and an inner-adhering inclined pad 763 is fixedly installed on the surface of the inner guide shaft 764 away from the circular ring 766. The inner-adhering inclined pad 763 fits closely with the inner wall of the curved tube 73, so that the sealing plug 78 can slide and move inside it, and the sealing plug 78 is limited and protected.

[0030] The inner inclined pad 763 and the air guide tube 762 are both fixedly connected to the inner wall of the curved tube 73 , and the inner inclined pad 763 and the air guide tube 762 assembly is provided with an air guide cavity 768 , and the air guide cavity 768 is connected with the connecting hole 767 through the air guide hole 74 .

[0031] The third embodiment is based on the first and second embodiments. Figures 8 to 10 As shown, the gas collecting chamber group 5 includes a bottom chamber 53, which is fixedly installed at the middle of the top of the bottom support plate 1. A circular groove is opened at the top of the bottom chamber 53, which is adapted to the sampling assembly 7. The bottom chamber 53 is provided with a connecting ring 51 through the circular groove. The connecting ring 51 is fixedly connected to the bottom of the sampling assembly 7. A support rod 54 is fixedly installed inside the connecting ring 51, and a shaking guide 52 is fixedly installed at the axis of the support rod 54. After the staff opens the valve of the gas storage tank, the chemical gas enters the bottom chamber 53 along the connecting pipe 8. At this time, the gas flow affects the shaking guide 52, causing the shaking guide 52 to shake, so as to accelerate the gas flow in the bottom chamber 53 when the gas passes through the shaking guide 52 and is transported to the curved pipe 73. The disc-shaped shaking guide 52 is arranged at the bottom end of the curved pipe 73 to block and adsorb some impurities in the chemical gas to improve the purity of the sampled gas.

[0032] The shaking guide 52 includes a round block 523, which is fixedly installed in the middle of the outer surface of the support rod 54. An elastic belt 522 is arranged inside the round block 523. There are six elastic belts 522. The six elastic belts 522 are distributed in a circle inside the round block 523, and the elastic belts 522 penetrate the round block 523 and extend to the top thereof. A connecting disc 524 is fixedly installed on the top of the elastic belt 522.

[0033] The bottom of the elastic belt 522 is fixedly installed with an adsorption block 525, and the outer surface of the adsorption block 525 is fixedly installed with a spring 526. The outer surface of the adsorption block 525 is provided with a limit plate 521, and the adsorption block 525 is slidably adapted to the limit plate 521 through the spring 526. When the gas is injected into the bottom cavity 53, the flowing gas blows the elastic belt 522, so that the elastic belt 522 drives the adsorption block 525 and the limit plate 521 to shake with the swing of the elastic belt 522. At this time, the adsorption block 525 slides in the limit plate 521 under the influence of the swing inertia, and squeezes the spring 526, thereby improving the fluidity of the gas at the bottom end of the curved pipe 73. The adsorption block 525 is set to be made of activated carbon. When the gas passes through the shaking guide 52 and is injected into the curved pipe 73, the disc-shaped limit plate 521 limits the gas flow path. At this time, part of the gas contacts the adsorption block 525 when injected into the curved pipe 73, and the impurities in the gas are adsorbed.

[0034] When in use, before sampling the chemical gas, the staff first connects the sampling bottle with a control valve to the outlet pipe 71, and connects the connecting pipe 8 to the gas storage tank. At this time, the staff opens the valve of the gas storage tank, so that the chemical gas in the gas storage tank enters the interior of the gas collecting chamber group 5 through the connecting pipe 8. At the same time, the staff pulls the limiting circular plate 72 so that the pulling rod 77 drives the sealing plug 78 to slide in the extraction guide 76 to guide the gas into the outlet pipe 71, so that the sliding gas is injected into the sampling bottle along the outlet pipe 71, and the valve of the sampling bottle is closed to complete the gas sampling.

[0035] After the staff opens the valve of the gas storage tank, the chemical gas enters the bottom cavity 53 along the connecting pipe 8. At this time, the gas flow affects the shaking guide 52, causing the shaking guide 52 to shake, so as to accelerate the gas flow in the bottom cavity 53 when the gas passes through the shaking guide 52 and is transported to the curved pipe 73. The disc-shaped shaking guide 52 is set at the bottom end of the curved pipe 73 to block and adsorb some impurities in the chemical gas to improve the purity of the sampled gas.

[0036] When gas is injected into the bottom cavity 53, the flowing gas blows the elastic belt 522, so that the elastic belt 522 drives the adsorption block 525 and the limiting plate 521 to shake with the swing of the elastic belt 522. At this time, the adsorption block 525 slides in the limiting plate 521 due to the inertia of the swing, and squeezes the spring 526, so as to improve the fluidity of the gas at the bottom end of the curved pipe 73. The adsorption block 525 is set to be made of activated carbon. When the gas passes through the shaking guide 52 and is injected into the curved pipe 73, the disc-shaped limiting plate 521 limits the gas flow path. At this time, part of the gas contacts the adsorption block 525 when injected into the curved pipe 73, so as to adsorb the impurities in the gas.

[0037] The gas enters the bent pipe 73 through the bottom cavity 53, and the staff pulls the limiting circular plate 72, so that the limiting circular plate 72 drives the pulling rod 77 and the sealing plug 78 to slide and displace in the extraction air guide 76, so that the sealing plug 78 slides to the outside of the extraction air guide 76. At this time, the bent pipe 73 is connected to the extraction air guide 76 to guide the gas to the outlet pipe 71. At this time, the sealing ring 79 is affected by the sealing plug 78 pulled outward, displaced to the side of the limiting ring 75 and slid on the inner wall of the bent pipe 73 to avoid gas leakage in the bent pipe 73 after the sealing plug 78 moves out of the extraction air guide 76 and causes an explosion.

[0038] When the sealing plug 78 drives the sealing ring 79 away from the extraction air guide 76, the volume of the cavity formed between the sealing ring 79 and the curved pipe 73 increases, which reduces the gas flow rate. On the contrary, when the distance between the sealing ring 79 and the curved pipe 73 is closer, the gas flow rate is accelerated, so that the staff can adjust the gas flow rate during sampling.

[0039] After the sealing plug 78 slides in the inner guide shaft 764 and moves out of the air guide tube 762, the gas in the curved tube 73 first enters the annular air guide cavity 768 along the guide hole 765 set in the air guide tube 762, and is then transported to the outlet tube 71 through the connecting hole 767. Since the aperture of the guide hole 765 is small, the flow and transportation of the gas is accelerated when passing through the guide hole 765, so that the gas contacts the solid adsorbent in the annular air guide cavity 768, thereby adsorbing and removing impurities in the gas. At the same time, multiple sampling cavities improve the sealing of gas sampling to prevent excess gas induced after gas sampling from being discharged into the air.

[0040] The inner inclined pad 763 fits snugly with the inner wall of the curved pipe 73 to facilitate the sliding displacement of the sealing plug 78 therein, thereby providing position limiting protection for the sealing plug 78 .

[0041] The positioning frames 31 are sleeved on both ends of the curved pipe 73 through the circular arc ring 34 . The two positioning frames 31 are vertically cross-arranged to limit the curved pipe 73 so as to improve the stability of the curved pipe 73 .

[0042] After the gas sampling is completed, the staff closes the valves of the sampling tube and the gas storage tank, and pushes the limiting circular plate 72 to drive the sealing ring 79 and the sealing plug 78 to move and reset along with the pulling rod 77, so that the sealing ring 79 and the sealing plug 78 seal the extraction guide 76, and seal the residual gas in the bottom cavity 53 to prevent gas leakage.

[0043] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A gas sampling device for chemical safety, characterized in that: include: A bottom support plate (1), side connecting plates (4) being fixedly mounted on both sides of the outer surface of the bottom support plate (1), and a support seat (6) being fixedly mounted on the bottom of the side connecting plate (4); A stable pipe support frame (3) is used for limiting the position of a chemical gas conveying pipe, wherein a side sealing cover (9) is sleeved on one side of the outer surface of the stable pipe support frame (3), a protective sealing cover (2) is sleeved on a side of the stable pipe support frame (3) away from the side sealing cover (9), and the side sealing cover (9) is fixedly connected to the protective sealing cover (2); A sampling assembly (7), the sampling assembly (7) is used for extracting and transporting chemical gases; A gas collecting chamber group (5), the gas collecting chamber group (5) being used for mixing and collecting chemical gases, a connecting pipe (8) being fixedly mounted on the outer surface of the gas collecting chamber group (5); The gas collecting chamber group (5) is fixedly mounted at the middle of the top of the bottom support plate (1); the stable pipe support frame (3) is fixedly mounted on the top of the gas collecting chamber group (5) via a protective sealing cover (2); two groups of the stable pipe support frames (3) are provided, and the two groups of the stable pipe support frames (3) are vertically cross-arranged on the surface of the sampling component (7); and the sampling component (7) is fixedly mounted inside the stable pipe support frames (3); The gas collecting chamber group (5) comprises a bottom chamber (53), the bottom chamber (53) is fixedly mounted at the middle of the top of the bottom support plate (1), a circular groove is provided at the top of the bottom chamber (53), the circular groove is adapted to the sampling assembly (7), a connecting ring (51) is provided in the bottom chamber (53) through the circular groove, the connecting ring (51) is fixedly connected to the bottom of the sampling assembly (7), a support rod (54) is fixedly mounted inside the connecting ring (51), and a shaking guide (52) is fixedly mounted at the axis of the support rod (54).

2. A chemical safety gas sampling device according to claim 1, characterized in that: The shaking guide (52) comprises a round block (523), the round block (523) being fixedly mounted at the middle of the outer surface of the support rod (54), an elastic belt (522) being arranged inside the round block (523), six elastic belts (522) being arranged, the six elastic belts (522) being distributed in a circular shape inside the round block (523), and the elastic belts (522) passing through the round block (523) and extending to the top thereof, and a connecting round piece (524) being fixedly mounted on the top of the elastic belt (522).

3. A chemical safety gas sampling device according to claim 2, characterized in that: An adsorption block (525) is fixedly mounted on the bottom of the elastic band (522), a spring (526) is fixedly mounted on the outer surface of the adsorption block (525), a limit plate (521) is arranged on the outer surface of the adsorption block (525), and the adsorption block (525) is slidably matched with the limit plate (521) via the spring (526).

4. A chemical safety gas sampling device according to claim 1, characterized in that: The sampling assembly (7) comprises a curved tube (73), wherein two groups of the curved tubes (73) are provided, and the tops of the two groups of curved tubes (73) are each provided with an air guide hole (74). The outer surface of the curved tube (73) on a side close to the air guide hole (74) is sleeved with an air extraction guide member (76), and a guide pipe (71) is fixedly mounted on the top of the air extraction guide member (76). The guide pipe (71) passes through the side sealing cover (9) and extends to the outside thereof. The bottom of the curved tube (73) passes through the bottom cavity (53) and extends to the inside of the cavity thereof, and the connecting ring (51) is fixedly mounted on the bottom of the curved tube (73).

5. A chemical safety gas sampling device according to claim 4, characterized in that: A limiting ring (75) is fixedly installed at the end of the curved tube (73) close to the side sealing cover (9), and a pull-out rod (77) is slidably adapted inside the limiting ring (75). A sealing plug (78) is fixedly installed at one end of the pull-out rod (77) close to the extraction air guide (76), and a limiting circular plate (72) is fixedly installed at the other end of the pull-out rod (77). The pull-out rod (77) includes a sealing ring (79) slidably adapted on the surface of one side of the limiting circular plate (72), and the sealing ring (79) is frictionally adapted to the inner wall of the curved tube (73), and the sealing plug (78) is frictionally adapted to the inner wall of the extraction air guide (76).

6. A chemical safety gas sampling device according to claim 5, characterized in that: The extraction air guide member (76) comprises an outer cover (761), the outer cover (761) being sleeved on the outer surface of the curved pipe (73), a connection hole (767) being provided in the middle of the top of the outer cover (761), the connection hole (767) being fixedly connected to the outlet pipe (71), and the connection hole (767) being communicated with the air guide hole (74).

7. A chemical safety gas sampling device according to claim 6, characterized in that: An air guide tube (762) is arranged inside the outer cover (761), a guide hole (765) is opened inside the air guide tube (762), an inner guide shaft (764) is fixedly mounted on the inner wall of the air guide tube (762), a circular ring (766) is sleeved on the outer surface of the inner guide shaft (764), and an inner tilt pad (763) is fixedly mounted on the surface of the inner guide shaft (764) away from the circular ring (766).

8. A chemical safety gas sampling device according to claim 7, characterized in that: The inner-attached tilting pad (763) and the air guide tube (762) are both fixedly connected to the inner wall of the curved tube (73); the inner-attached tilting pad (763) and the air guide tube (762) assembly are provided with an air guide cavity (768); the air guide cavity (768) is connected to the connection hole (767) via the air guide hole (74).

9. A chemical safety gas sampling device according to claim 1, characterized in that: The stable pipe support frame (3) comprises a positioning frame (31), wherein two groups of the positioning frames (31) are provided, and the two groups of the positioning frames (31) are arranged in a vertical cross shape, and a clamping block (35) is fixedly mounted on the surface of the positioning frame (31), and the clamping block (35) is symmetrically arranged with the positioning frame (31) as the center, and an arc ring (34) is clamped inside the clamping block (35).

10. A chemical safety gas sampling device according to claim 9, characterized in that: Two groups of the circular arc rings (34) are provided. Limiting strips (33) are fixedly installed on the tops of the two groups of circular arc rings (34). Connecting rods (32) are fixedly installed between opposite surfaces of the circular arc rings (34). The circular arc rings (34) are all arranged on the outer surface of the curved pipe (73). The circular arc rings (34) are arranged on the positioning frame (31) in a vertically cross manner and are sleeved on both ends of the outer surface of the curved pipe (73).

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