A closed hydrofluoric acid sampling device

Abstract

The invention discloses a closed sampling device for hydrofluoric acid, relates to the technical field related to sampling devices, solves the problem that the sampled hydrofluoric acid sample is difficult to represent the quality of hydrofluoric acid, and solves the problem that the external gas will contact and react with the hydrofluoric acid during the sampling process, affecting the storage sampling state of the hydrofluoric acid. The closed sampling device for hydrofluoric acid includes a storage tank, an external support component, an input pipeline, a closed sampling mechanism, a temperature control component and a sampling cylinder, wherein the storage tank is installed on the ground through the external support component installed on the outside, and the two sides of the top of the storage tank are equipped with input pipelines, and the sides of the input pipeline are equipped with a closed sampling mechanism extending to the inside of the storage tank. In the present invention, the sampling operation of hydrofluoric acid can be automatically realized, and the ambient temperature during storage and sampling can be controlled and adjusted at the same time to ensure the quality of hydrofluoric acid. Moreover, during the sampling process, the external gas will not contact the hydrofluoric acid, ensuring that the hydrofluoric acid is in a sealed environment.

Description

Technical Field

[0001] The present invention relates to the technical field related to sampling devices, and in particular to a closed hydrofluoric acid sampling device. Background Art

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming corrosive liquid with a strong pungent odor. Therefore, when storing hydrofluoric acid, it is necessary to store it in a sealed container. When using hydrofluoric acid, it is necessary to sample the hydrofluoric acid.

[0003] The existing Chinese patent application with publication number CN115597915A discloses a closed sampling device for hydrofluoric acid, including a storage bottle for storing hydrofluoric acid, a connecting mechanism arranged at the connection port of the storage bottle, and a sampling mechanism for sampling hydrofluoric acid in cooperation with the connecting mechanism, wherein the connecting mechanism includes a sealing cover arranged at the connection port of the storage bottle, a connecting component arranged on the sealing cover, and a cleaning component arranged on the connecting component; the connecting component includes an infusion piece with one end passing through the bottom wall of a storage groove opened in the storage bottle and the other end passing through the top of the sealing cover, and a connecting piece arranged above the sealing cover and connected to the infusion piece; the cleaning component includes a cleaning block that can be connected to the cleaning component through the connecting groove, and a cleaning component connected to the cleaning block; the invention is connected to the connecting component on the sealing cover through the sampling mechanism, so as to facilitate sampling of the hydrofluoric acid in the storage bottle through the sampling mechanism.

[0004] However, the sampling device has the following defects when used:

[0005] When the existing sampling device samples the sealed hydrofluoric acid, since the hydrofluoric acid is in liquid state, the sampling operation is generally completed by extracting it through a liquid pump. However, in the above scheme, when sampling is actually performed, the sampled liquid (hydrofluoric acid) is generally at the bottom of the storage container, and the sampled sample is difficult to represent the quality of the liquid. At the same time, during the sampling process, some gas will enter the interior of the storage container, contact and react with the liquid (hydrofluoric acid), and affect the state of the liquid (hydrofluoric acid) when it is stored;

[0006] When existing sampling devices sample and store hydrofluoric acid, the sampled hydrofluoric acid samples are generally placed and stored inside a sampling tube. However, hydrofluoric acid has too high a storage temperature requirement. When the weather temperature is too high or too low, it will affect the state of the hydrofluoric acid and the quality of the sampled hydrofluoric acid. In subsequent tests, the accuracy of the test results is low. Summary of the invention

[0007] The object of the present invention is to provide a closed hydrofluoric acid sampling device to solve the problems raised in the above background technology.

[0008] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0009] The present invention provides a closed sampling device for hydrofluoric acid, comprising a storage tank, an external support component, an input pipeline, a closed sampling mechanism, a temperature control component and a sampling barrel, wherein the storage tank is installed on the ground through the external support component installed on the outside, input pipelines are installed on both sides of the top of the storage tank, and the closed sampling mechanism extending to the inside of the storage tank is installed on the side of the input pipeline, and the output end of the closed sampling mechanism extends to the inside of the sampling barrel,

[0010] A temperature control component is installed inside the storage tank, the temperature control component extends to the outside of the storage tank and is supported on the top of the outer support component, and the sampling tube is installed inside the temperature control component;

[0011] Wherein, the closed sampling mechanism includes:

[0012] a staged sampling assembly, the staged sampling assembly being installed inside the storage tank, and a sealing assembly being installed on the outside of the top, the sealing assembly being installed at the center of the top of the storage tank, and the staged sampling assembly extending to the outside of the storage tank; and

[0013] A sampling control assembly, wherein the sampling control assembly is installed on the top of the graded sampling assembly and on the top of the sealing assembly, and the output end of the sampling control assembly extends to the interior of the sampling cylinder, wherein the temperature control assembly and the sampling control assembly are both electrically connected to the control end, and a temperature sensor is also installed on the inner wall of the storage tank, and the temperature sensor is electrically connected to the control end.

[0014] As a preferred solution of the present invention, the outer support component is composed of an inner positioning ring and an outer support column. The positioning ring is provided in two groups and is installed on the outer side of the storage tank.

[0015] There are four groups of support columns which are equidistantly arranged in a ring shape and are installed on the outside of the positioning ring. The top of the support column supports a temperature control component.

[0016] As a preferred embodiment of the present invention, the temperature control component includes:

[0017] A temperature control device is installed at the top of the support column and the positioning ring. The output end of the temperature control device is connected to a gas input pipe, and the gas input pipe extends to the interior of the storage tank.

[0018] The bottom of the gas input pipe is connected to a temperature control tube body, and a plurality of temperature sensing protrusions are arranged in an annular shape and at equal intervals on the outer side of the temperature control tube body; and

[0019] A gas output pipeline is connected to the bottom of the temperature control tube body and extends to the outside of the storage tank. The gas output pipeline runs through the support column.

[0020] Wherein, an activated carbon grid is installed at the inner bottom of the gas output pipeline.

[0021] As a preferred solution of the present invention, the temperature control device is composed of a shell, a control module, an air extraction module, a heating and cooling module, an air supply module and an execution module. The shell is installed on the top of the support column and the positioning ring, two sets of air extraction modules are installed on one side of the shell, and the control module is installed on the other side of the shell.

[0022] The back of the control module is electrically connected to an execution module, and the side of the execution module is electrically connected to two groups of heating and cooling modules, and the heating and cooling modules are connected to the exhaust module to heat and / or cool the gas.

[0023] The bottom of the execution module is electrically connected to a gas supply module, the gas supply module is connected to the heating and cooling module, the output end of the gas supply module is connected to a gas input pipe, and

[0024] Wherein, the heating and cooling module, the air supply module and the execution module are all arranged inside the shell and connected to the power supply.

[0025] As a preferred embodiment of the present invention, the side of the gas input pipe is connected to a shunt pipe, the bottom of the shunt pipe extends to the interior of the temperature control sampling assembly, and the temperature control sampling assembly includes:

[0026] A support platform, the support platform is mounted on the top of the support column and the positioning ring by screws, the top of the support platform supports an outer protective frame, the inner part of the outer protective frame is movably connected to a rotating platform, and the outer protective frame is connected to the diversion pipeline; and

[0027] An inner positioning protrusion is fixedly mounted on the top of the rotating table and is located at the eccentric position of the rotating table. A sampling tube located on the top of the rotating table is installed on the inner side of the inner positioning protrusion.

[0028] Wherein, the sampling tube extends to the outside of the outer protective frame, and the rotating table is driven by a motor installed at the bottom of the supporting table.

[0029] As a preferred solution of the present invention, a rubber ring is sleeved on the outer side of the top of the sampling tube, and a sealing cover is arranged on the inner side of the rubber ring.

[0030] Wherein, the sealing cover body and the sampling control component are connected.

[0031] As a preferred embodiment of the present invention, the graded sampling assembly comprises:

[0032] The extraction pipe is installed at the center of the storage tank, and a partition is installed on the outside. The partition is provided in two groups and both are fixed inside the storage tank.

[0033] The two groups of partitions divide the space inside the storage tank into three parts, which are arranged from top to bottom as an upper connecting part, a middle storage part and a lower extraction part, and the upper connecting part, the middle storage part and the lower extraction part are connected through a through hole, and the through hole is opened inside the partition; and

[0034] An external extraction pipe, the external extraction pipe is connected to the outside of the extraction pipe and is provided with a plurality of baffles, the outside of the extraction pipe is provided with baffles, the baffles are provided with two groups, and are respectively installed at the bottom of the sealing assembly and the top of the partition,

[0035] Wherein, a stabilizing spring is arranged between the two groups of baffles, and the stabilizing spring is arranged on the outside of the extraction pipe.

[0036] As a preferred solution of the present invention, a sealing component is installed on the outer side of the top of the extraction pipeline, and the top of the extraction pipeline is connected to a sampling control component.

[0037] As a preferred embodiment of the present invention, the sealing assembly comprises:

[0038] A sealing sleeve, wherein the sealing sleeve is installed at the center of the top of the storage tank, a buffer seat is installed on the top of the sealing sleeve, and a sampling control assembly is supported on the top of the buffer seat; and

[0039] A waterproof ring, the waterproof ring is installed on the inner bottom of the sealing sleeve, a protective ring is arranged on the top of the waterproof ring, a bearing is arranged on the inner side of the protective ring, a sealing ring is arranged on the top of the protective ring, and the sealing ring is arranged on the inner top of the sealing sleeve,

[0040] Wherein, an extraction pipeline is arranged through the interior of the waterproof ring, the bearing and the sealing ring.

[0041] As a preferred embodiment of the present invention, the sampling control component includes:

[0042] An external frame, the external frame is installed on the top of the buffer seat, an extraction pump is arranged on the inner side of the external frame, and the extraction pump is connected to the extraction pipeline;

[0043] A central valve is installed on the inner side of the external frame and is connected to the output end of the extraction pump. An outer tube body is installed on the top of the central valve.

[0044] The middle-through valve and the outer tube body are movably connected with a piston, the top of the piston is connected with a connecting shaft, the connecting shaft is connected to the output end of the servo electric cylinder, the servo electric cylinder is installed on the top of the cylinder seat, and the cylinder seat is installed on the top of the external frame; and

[0045] an infusion tube, the infusion tube being connected to the side of the middle-through valve and being communicated with the infusion port, the infusion tube penetrating the sealing cover body and extending to the interior of the sampling tube,

[0046] Wherein, the infusion port is opened inside the middle-through valve.

[0047] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0048] 1. In the closed sampling device for hydrofluoric acid, the sampling operation of hydrofluoric acid is completed by using the power generated by the extraction pump to transfer the hydrofluoric acid stored in the storage tank through the extraction pipeline to the inside of the central valve, and then to the inside of the sampling tube through the infusion tube connected to the side of the central valve, so as to complete the sampling operation of hydrofluoric acid. The operation is simple and convenient. At the same time, when the hydrofluoric acid sampling operation is actually carried out, the waterproof ring and sealing ring installed on the outside of the extraction pipeline can reduce the probability of outside air entering the storage tank and contacting and reacting with hydrofluoric acid. In addition, when the hydrofluoric acid is actually sampled, the central valve for circulating hydrofluoric acid drives the output end coupling and piston to move telescopically through the servo electric cylinder to complete the switch and closure of the infusion port inside the central valve. In this way, the sealing operation after the hydrofluoric acid sampling can be completed without affecting the normal sampling of hydrofluoric acid, further reducing the probability of outside gas entering the storage tank during the hydrofluoric acid sampling, and improving the overall sealing of the device;

[0049] 2. In the hydrofluoric acid closed sampling device, when storing hydrofluoric acid, the temperature inside the storage tank is controlled by transmitting the temperature-adjusted gas to the temperature control tube through the temperature control device, thereby ensuring that the storage tank storing the hydrofluoric acid has the best hydrofluoric acid storage temperature. At the same time, the temperature-adjusted gas can be transmitted to the inside of the outer protective frame through the shunt pipe when sampling hydrofluoric acid, thereby performing temperature adjustment on the sampling cylinder set on the inner side of the outer protective frame, ensuring that the sampling cylinder for hydrofluoric acid sampling is at the best sample (hydrofluoric acid) storage temperature, and improving the accuracy of subsequent detection of hydrofluoric acid;

[0050] 3. In the hydrofluoric acid closed sampling device, when extracting hydrofluoric acid, the design of several external extraction tubes (with different positions and heights) outside the extraction pipeline can be used to simultaneously sample hydrofluoric acid at different positions and heights inside the storage tank, so as to ensure that when sampling hydrofluoric acid, the hydrofluoric acid sample can reflect the average quality of the hydrofluoric acid stored inside the storage tank;

[0051] 4. In the hydrofluoric acid closed sampling device, when adjusting the temperature of the sampling tube installation position, the hydrofluoric acid set inside the sampling tube can be circulated by the motor driving the output end rotating table and the sampling tube to rotate, thereby ensuring that the temperature-adjusting shunt pipe can evenly contact different positions of the sampling tube, thereby improving the efficiency of regulating the internal temperature of the sampling tube. In addition, the top of the sampling tube is sealed by a rubber ring and a sealing cover, and an infusion tube connected to the rubber ring and the sealing cover is provided at the opening at the top of the sampling tube, thereby ensuring the sealing of the sampling tube when the sampling tube rotates, while preventing hydrofluoric acid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0053] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0055] Figure 2 It is a schematic diagram of the structure of the overall partial cross-section of the present invention;

[0056] Figure 3 It is a structural schematic diagram of the storage tank of the present invention;

[0057] Figure 4 It is a schematic structural diagram of a side section of a storage tank of the present invention;

[0058] Figure 5 It is a structural schematic diagram of the cross-section view of the connection between the temperature control component and the sampling tube of the present invention;

[0059] Figure 6 It is a structural schematic diagram of the connection between the temperature control component and the sampling tube of the present invention;

[0060] Figure 7 It is a structural schematic diagram of the temperature control device of the present invention;

[0061] Figure 8 It is a schematic diagram of the structure in which the gas input pipe of the present invention is connected to the explosion through the diversion pipe and the sampling tube;

[0062] Fig. 9It is a structural schematic diagram of the closed sampling mechanism of the present invention;

[0063] Fig.10 It is a structural schematic diagram of the cross-section of the connection between the extraction pipeline and the sealing assembly of the present invention;

[0064] Fig.11 It is a schematic structural diagram of a cross-section of a sampling control assembly of the present invention;

[0065] Fig.12 The present invention Fig.11 Schematic diagram of the structure of the enlarged area A in the middle;

[0066] In the figure:

[0067] 10. Storage tank; 101. Temperature sensor;

[0068] 20. External support member; 201. Positioning ring; 202. Support column;

[0069] 30. Input pipeline;

[0070] 40. Closed sampling mechanism;

[0071] 50. Temperature control assembly; 501. Temperature control device; 5011. Shell; 5012. Control module; 5013. Air extraction module; 5014. Heating and cooling module; 5015. Air supply module; 5016. Execution module; 502. Gas input pipe; 5021. Diversion pipe; 5022. Support platform; 5023. External protective frame; 5024. Rotating platform; 5025. Internal positioning protrusion; 5026. Motor; 503. Temperature control tube body; 504. Temperature sensing protrusion; 505. Gas output pipe; 506. Activated carbon grid;

[0072] 60, sampling tube; 601, rubber ring; 602, sealing cover;

[0073] 70, graded sampling assembly; 701, extraction pipeline; 702, partition; 7021, upper connecting part; 7022, middle storage part; 7023, lower extraction part; 7024, through hole; 703, outer extraction tube; 704, baffle; 705, stabilizing spring;

[0074] 80, sealing assembly; 801, sealing sleeve; 802, buffer seat; 803, waterproof ring; 804, protective ring; 805, bearing; 806, sealing ring;

[0075] 90. Sampling control assembly; 901. External rack; 902. Extraction pump; 903. Center-through valve; 9031. Infusion port; 904. External tube body; 905. Piston; 906. Coupling; 907. Servo electric cylinder; 9071. Cylinder seat; 908. Infusion tube. DETAILED DESCRIPTION

[0076] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0077] See also Figure 1-Figure 12 A closed sampling device for hydrofluoric acid includes a storage tank 10, an outer support component 20, an input pipe 30, a closed sampling mechanism 40, a temperature control component 50 and a sampling barrel 60. The storage tank 10 is installed on the ground through the outer support component 20 installed on the outside. The input pipes 30 are installed on both sides of the top of the storage tank 10. The side of the input pipe 30 is installed with a closed sampling mechanism 40 extending to the inside of the storage tank 10. The output end of the closed sampling mechanism 40 extends to the inside of the sampling barrel 60. At the same time, a temperature control component 50 is installed inside the storage tank 10. The temperature control component 50 extends to the outside of the storage tank 10 and is supported on the top of the outer support component 20. The sampling barrel 60 is installed inside the temperature control component 50; wherein the closed sampling mechanism 40 includes There are: a graded sampling component 70, which is installed inside the storage tank 10, and a sealing component 80 is installed on the outside of the top, the sealing component 80 is installed at the center of the top of the storage tank 10, and the graded sampling component 70 extends to the outside of the storage tank 10; and a sampling control component 90, which is installed on the top of the graded sampling component 70 and on the top of the sealing component 80, and the output end of the sampling control component 90 extends to the inside of the sampling tube 60, wherein the temperature control component 50 and the sampling control component 90 are both electrically connected to the control end, a switch control valve is provided inside the input pipe 30, and a temperature sensor 101 is also installed on the inner wall of the storage tank 10, and the temperature sensor 101 is electrically connected to the control end.

[0078] The above working principle: when sampling the hydrofluoric acid stored in the storage tank 10, the extraction force generated by the sampling control component 90 can be transmitted to the inside of the graded sampling component 70 through the operation of the sampling control component 90, and the graded sampling and extraction operation of the hydrofluoric acid is completed through the graded sampling component 70, so that the sampled hydrofluoric acid meets the average quality of the stored hydrofluoric acid. Among them, when the graded sampling component 70 transmits the sampled hydrofluoric acid to the inside of the sampling tube 60 through the sampling control component 90, the sealing component 80 can ensure that during the sampling process, the external gas will not enter the inside of the storage tank 10 and affect the state of the stored hydrofluoric acid. At the same time, when hydrofluoric acid is actually stored and sampled, the temperature control component 50 can control and adjust the storage environment of the hydrofluoric acid so that the interior of the storage tank 10 is at an optimal storage temperature. In addition, for the hydrofluoric acid sample sampled into the sampling tube 60, temperature control processing can be performed simultaneously to ensure that the sampled hydrofluoric acid sample and the stored hydrofluoric acid sample have the same quality, so that more accurate hydrofluoric acid quality data can be obtained in subsequent testing.

[0079] Specific reference Figure 2 The outer support component 20 is composed of an inner positioning ring 201 and an outer support column 202. There are two groups of positioning rings 201, which are installed on the outside of the storage tank 10. At the same time, there are four groups of support columns 202 that are equidistantly arranged in a ring shape and installed on the outside of the positioning ring 201. The top of the support column 202 supports the temperature control component 50. The design of the positioning ring 201 can stably and firmly install and fix the storage tank 10, and cooperate with the support column 202 to stably support the storage tank 10.

[0080] Specific reference Figure 6 The temperature control assembly 50 includes: a temperature control device 501, which is installed at the top of the support column 202 and the positioning ring 201. The output end of the temperature control device 501 is connected to a gas input pipe 502, and the gas input pipe 502 extends to the inside of the storage tank 10, wherein the bottom of the gas input pipe 502 is connected to a temperature control tube body 503, and the outer side of the temperature control tube body 503 is annularly and equidistantly provided with a plurality of temperature sensing protrusions 504; and a gas output pipeline 505, which is connected to the bottom of the temperature control tube body 503 and extends to the outside of the storage tank 10, and the gas output pipeline 505 is arranged through the support column 202, and an activated carbon grid 506 is installed at the inner bottom of the gas output pipeline 505.

[0081] In the hydrofluoric acid sealed sampling device of the present invention, the temperature control device 501 transmits the regulated gas (after temperature adjustment) to the interior of the temperature control tube body 503 through the gas input pipe 502. Afterwards, the gas moved to the interior of the temperature control tube body 503 will contact the stored hydrofluoric acid through the temperature sensing protrusion 504, and the temperature of the hydrofluoric acid in the storage state will be controlled and adjusted. The design of the gas output pipeline 505 allows the gas after contact to be transmitted to the outside through the gas output pipeline 505, which is convenient for continuous temperature adjustment. The design of the activated carbon grid 506 can isolate impurities such as dust from the outside, thereby preventing impurities such as dust from entering the interior of the temperature control tube body 503, so as to prevent damage to the inner wall of the temperature control tube body 503.

[0082] Specific reference Figure 7 In the above scheme, the temperature control device 501 is composed of a shell 5011, a control module 5012, an air extraction module 5013, a heating and cooling module 5014, an air supply module 5015 and an execution module 5016. The shell 5011 is installed on the top of the support column 202 and the positioning ring 201. Two sets of air extraction modules 5013 are installed on one side of the shell 5011, and the control module 5012 is installed on the other side of the shell 5011. The back of the control module 5012 is electrically connected to the execution module 5016, and the side of the execution module 5016 is electrically connected to the Two groups of heating and cooling modules 5014 are connected, the heating and cooling module 5014 is connected to the exhaust module 5013, and the gas is heated and / or cooled; wherein, the bottom of the execution module 5016 is electrically connected to the air supply module 5015, the air supply module 5015 is connected to the heating and cooling module 5014, the output end of the air supply module 5015 is connected to the gas input pipe 502, and the heating and cooling module 5014, the air supply module 5015 and the execution module 5016 are all arranged inside the shell 5011 and connected to the power supply.

[0083] According to the temperature control device 501 provided above, in actual use, the execution module 5016 receives the temperature transmitted by the temperature sensor 101, and starts the air extraction module 5013 to extract the external gas. Afterwards, the extracted air will enter the interior of the heating and cooling module 5014, and the heating and / or cooling operation of the gas will be completed through the units inside the heating and cooling module 5014. The gas that has completed the heating and / or cooling operation will be transmitted to the interior of the air supply module 5015, and transmitted to the interior of the gas input pipe 502 through the air supply module 5015 to complete the gas temperature adjustment operation. Among them, the design of the control module 5012 can realize automatic control and adjustment of the gas, thereby ensuring that the temperature inside the storage tank 10 is the preferred or even optimal hydrofluoric acid storage temperature. In addition, there can be multiple units inside the heating and cooling module 5014, which can simultaneously complete the heating of part of the gas and the cooling of part of the gas.

[0084] Specific reference Figure 8 When the temperature control assembly 50 is in operation, the side of the gas input pipe 502 is connected to a bypass pipe 5021, and the bottom of the bypass pipe 5021 extends to the interior of the temperature control sampling assembly. The temperature-controlled sampling assembly includes: a support platform 5022, which is installed on the top of the support column 202 and the positioning ring 201 by screws, the top of the support platform 5022 supports an outer protective frame 5023, the inner part of the outer protective frame 5023 is movably connected to a rotating table 5024, and the outer protective frame 5023 is connected to the diversion pipe 5021; and an inner positioning protrusion 5025, which is installed and fixed on the top of the rotating table 5024 and is located at the eccentric position of the rotating table 5024, and the inner side of the inner positioning protrusion 5025 is installed with a sampling barrel 60 located on the top of the rotating table 5024, wherein the sampling barrel 60 extends to the outside of the outer protective frame 5023, and the rotating table 5024 is driven by a motor 5026 installed at the bottom of the support platform 5022.

[0085] A one-way valve is provided at the connection portion between the diversion pipe 5021 and the outer protective frame 5023 .

[0086] In the hydrofluoric acid sealed sampling device of the present invention, when sampling hydrofluoric acid, the gas controlled by temperature inside the gas input pipe 502 will be transmitted to the inside of the outer frame 5023 through the shunt pipe 5021, and the sampling barrel 60 arranged on the side of the outer frame 5023 will be temperature-adjusted to ensure that the quality of the hydrofluoric acid sample inside the sampling barrel 60 will not change significantly due to the temperature. Among them, the sampling barrel 60 is installed on the inner side of the inner positioning protrusion 5025 and on the top of the rotating table 5024. The sampling barrel 60 can be clamped and positioned by a plurality of inner positioning protrusions 5025. The sampling barrel 60 can also be driven to rotate by the motor 5026 to drive the rotating table 5024 to rotate, thereby facilitating the shunt pipe 5021 to perform temperature control on various parts of the sampling barrel 60, so that the temperature inside the sampling barrel 60 can be quickly adjusted.

[0087] Specific reference Figure 8 A rubber ring 601 is sleeved on the outer side of the top of the sampling tube 60, and a sealing cover 602 is arranged on the inner side of the rubber ring 601. Meanwhile, the sealing cover 602 is connected to the sampling control assembly 90. The design of the rubber ring 601 can improve the sealing performance during the sampling of hydrofluoric acid.

[0088] Specific reference Fig. 9The graded sampling assembly 70 includes: an extraction pipe 701, which is installed at the center of the storage tank 10, and a partition 702 is installed on the outside. The partition 702 is provided in two groups, and both are installed and fixed inside the storage tank 10. At the same time, the two groups of partitions 702 divide the space inside the storage tank 10 into three parts, which are arranged from top to bottom in sequence as an upper connecting part 7021, a middle storage part 7022 and a lower extraction part 7023. The upper connecting part 7021, the middle storage part 7022 and the lower extraction part 70 23 are connected through a through hole 7024, which is opened inside the partition 702; and an external extraction pipe 703, which is connected to the outside of the extraction pipe 701 and is provided with a plurality of baffles 704 installed on the outside of the extraction pipe 701, and the baffles 704 are provided with two groups, and are respectively installed at the bottom of the sealing assembly 80 and the top of the partition 702, wherein a stabilizing spring 705 is provided between the two groups of baffles 704, and the stabilizing spring 705 is provided on the outside of the extraction pipe 701.

[0089] In this embodiment, a sealing component 80 is installed on the outer side of the top of the extraction pipe 701, and the top of the extraction pipe 701 is connected to a sampling control component 90. When hydrofluoric acid is extracted, the design of the sealing component 80 can ensure that the gas does not enter the interior of the storage tank 10.

[0090] In the hydrofluoric acid sealed sampling device of the present invention, the extraction pipe 701 simultaneously extracts the hydrofluoric acid arranged in the middle storage part 7022 and the lower extraction part 7023 through the outer extraction pipe 703 installed on the outer side thereof, thereby realizing the graded extraction operation. In addition, the stabilizing spring 705 arranged on the inner side of the baffle 704 can stabilize the extraction pipe 701 in the extraction state, thereby improving the stability when extracting and sampling hydrofluoric acid.

[0091] Specific reference Fig.10 The sealing assembly 80 includes: a sealing sleeve 801, which is installed at the center of the top of the storage tank 10, a buffer seat 802 is installed on the top of the sealing sleeve 801, and the top of the buffer seat 802 supports the sampling control assembly 90; and a waterproof ring 803, which is installed on the inner bottom of the sealing sleeve 801, a protective ring 804 is arranged on the top of the waterproof ring 803, a bearing 805 is arranged on the inner side of the protective ring 804, a sealing ring 806 is arranged on the top of the protective ring 804, and the sealing ring 806 is arranged on the inner top of the sealing sleeve 801, wherein the interior of the waterproof ring 803, the bearing 805 and the sealing ring 806 are penetrated by an extraction pipe 701.

[0092] In the hydrofluoric acid sealed sampling device of the present invention, the design of the waterproof ring 803 and the sealing ring 806 inside the sealing sleeve 801 can achieve the effect of separating the external air and the hydrofluoric acid stored inside, effectively preventing the external gas from entering the inside of the storage tank 10 through the sealing sleeve 801, and preventing the hydrofluoric acid stored inside the storage tank 10 from leaking to the outside of the storage tank 10 through the waterproof ring 803. In addition, the design of the bearing 805 can achieve the support of the extraction pipe 701 and the positioning of the extraction pipe 701.

[0093] Specific reference Fig.11 and Fig.12 The sampling control assembly 90 includes: an external frame 901, which is installed on the top of the buffer seat 802, and an extraction pump 902 is arranged on the inner side of the external frame 901, and the extraction pump 902 is connected to the extraction pipeline 701; a central valve 903, which is installed on the inner side of the external frame 901 and is connected to the output end of the extraction pump 902, and an outer tube body 904 is installed on the top of the central valve 903, wherein the central valve 903 and the outer tube body 904 are internally movably connected with a piston 905, and the piston The top of 905 is connected with a connecting shaft 906, which is connected to the output end of a servo electric cylinder 907. The servo electric cylinder 907 is mounted on the top of a cylinder seat 9071, and the cylinder seat 9071 is mounted on the top of an external frame 901; and an infusion tube 908, which is connected to the side of the center-through valve 903 and communicated with the infusion port 9031. The infusion tube 908 passes through the sealing cover body 602 and extends to the interior of the sampling tube 60, wherein the infusion port 9031 is opened inside the center-through valve 903.

[0094] In the hydrofluoric acid sealed sampling device of the present invention, when sampling hydrofluoric acid, hydrofluoric acid will be transmitted to the middle valve 903 connected to the top due to the power generated by the extraction pump 902. At this time, the hydrofluoric acid inside the middle valve 903 will flow to the inside of the infusion port 9031 and be transmitted to the infusion tube 908 through the infusion port 9031. Afterwards, the infusion tube 908 inside the infusion tube 908 will enter the interior of the sampling cylinder 60 to complete the automatic sampling operation of hydrofluoric acid. Before the sampling is completed, the servo electric cylinder 907 can operate to drive the piston 905 connected to its output end through the connecting shaft 906 to move telescopically, and open one side of the infusion port 9031 of the middle valve 903 to facilitate the sampling of hydrofluoric acid. After the sampling of hydrofluoric acid is completed, the servo electric cylinder 907 can drive the piston 905 to move telescopically, seal one side of the infusion port 9031, and prevent the entry of external gas (through the infusion tube 908).

[0095] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A closed sampling device for hydrofluoric acid, comprising a storage tank (10), an external support component (20), an input pipeline (30), a closed sampling mechanism (40), a temperature control component (50) and a sampling tube (60), characterized in that: The storage tank (10) is installed on the ground via the outer support component (20) installed on the outside; the input pipe (30) is installed on both sides of the top of the storage tank (10); the closed sampling mechanism (40) extending into the interior of the storage tank (10) is installed on the side of the input pipe (30); the output end of the closed sampling mechanism (40) extends into the interior of the sampling cylinder (60); A temperature control component (50) is installed inside the storage tank (10), the temperature control component (50) extends to the outside of the storage tank (10) and is supported on the top of the outer support component (20), and the sampling tube (60) is installed inside the temperature control component (50). Wherein, the sealed sampling mechanism (40) comprises: a stepped sampling assembly (70), the stepped sampling assembly (70) being installed inside the storage tank (10), and a sealing assembly (80) being installed on the outside of the top, the sealing assembly (80) being installed at the center of the top of the storage tank (10), and the stepped sampling assembly (70) extending to the outside of the storage tank (10); and a sampling control assembly (90), the sampling control assembly (90) being mounted on the top of the graded sampling assembly (70) and on the top of the sealing assembly (80), the output end of the sampling control assembly (90) extending into the interior of the sampling cylinder (60), The temperature control component (50) and the sampling control component (90) are both electrically connected to the control end, and a temperature sensor (101) is also installed on the inner wall of the storage tank (10), and the temperature sensor (101) is electrically connected to the control end; The outer support component (20) is composed of an inner positioning ring (201) and an outer support column (202). Two sets of the positioning rings (201) are provided and are installed on the outer side of the storage tank (10). The support columns (202) are arranged in four groups at equal intervals in a ring shape and are installed on the outside of the positioning ring (201); the top of the support columns (202) supports a temperature control component (50); The temperature control component (50) comprises: a temperature control device (501), the temperature control device (501) being mounted on the top of the support column (202) and the positioning ring (201), the output end of the temperature control device (501) being connected to a gas input pipe (502), the gas input pipe (502) extending into the interior of the storage tank (10), The bottom of the gas input pipe (502) is connected to a temperature control tube body (503), and a plurality of temperature sensing protrusions (504) are arranged in an annular shape and at equal intervals on the outer side of the temperature control tube body (503); and a gas output pipeline (505), the gas output pipeline (505) being connected to the bottom of the temperature control tube body (503) and extending to the outside of the storage tank (10), the gas output pipeline (505) being arranged to penetrate the support column (202), Wherein, an activated carbon grid (506) is installed at the inner bottom of the gas output pipeline (505); The temperature control device (501) is composed of a housing (5011), a control module (5012), an air extraction module (5013), a heating and cooling module (5014), an air supply module (5015), and an execution module (5016); the housing (5011) is installed on the top of the support column (202) and the positioning ring (201); two groups of the air extraction modules (5013) are installed on one side of the housing (5011); and the control module (5012) is installed on the other side of the housing (5011). The back of the control module (5012) is electrically connected to the execution module (5016), the side of the execution module (5016) is electrically connected to two groups of the heating and cooling modules (5014), and the heating and cooling modules (5014) are connected to the exhaust module (5013) to heat and / or cool the gas. The bottom of the execution module (5016) is electrically connected to the gas supply module (5015), the gas supply module (5015) is connected to the heating and cooling module (5014), the output end of the gas supply module (5015) is connected to the gas input pipe (502), and Wherein, the heating and cooling module (5014), the air supply module (5015) and the execution module (5016) are all arranged inside the housing (5011) and connected to a power source; The side of the gas input pipe (502) is connected to a shunt pipe (5021), and the bottom of the shunt pipe (5021) extends to the interior of the temperature control sampling component, and the temperature control sampling component includes: a support platform (5022), the support platform (5022) being mounted on the top of the support column (202) and the positioning ring (201) by means of screws, the top of the support platform (5022) supporting an outer protective frame (5023), the interior of the outer protective frame (5023) being movably connected to a rotating platform (5024), the outer protective frame (5023) being in communication with the diversion pipe (5021); and an inner positioning protrusion (5025), the inner positioning protrusion (5025) being fixedly mounted on the top of the rotating platform (5024) and being located at an eccentric position of the rotating platform (5024), the sampling tube (60) being located at the top of the rotating platform (5024) being mounted on the inner side of the inner positioning protrusion (5025), The sampling tube (60) extends to the outside of the outer protective frame (5023), and the rotating platform (5024) is driven by a motor (5026) installed at the bottom of the supporting platform (5022); A rubber ring (601) is sleeved on the outer side of the top of the sampling tube (60), and a sealing cover (602) is provided on the inner side of the rubber ring (601). Wherein, the sealing cover (602) and the sampling control component (90) are in communication; The graded sampling component (70) comprises: An extraction pipe (701), the extraction pipe (701) being installed at the center of the storage tank (10), and having a partition (702) installed on the outside, wherein two groups of partitions (702) are provided and both are installed and fixed inside the storage tank (10), The two groups of partitions (702) divide the space inside the storage tank (10) into three parts, which are arranged from top to bottom in sequence as an upper connecting part (7021), a middle storage part (7022) and a lower extraction part (7023); the upper connecting part (7021), the middle storage part (7022) and the lower extraction part (7023) are connected via a through hole (7024); and the through hole (7024) is provided inside the partition (702); and an external extraction pipe (703), the external extraction pipe (703) being connected to the outside of the extraction pipe (701) and being provided with a plurality of baffles (704), the outside of the extraction pipe (701) being provided with two groups of baffles (704), which are respectively installed at the bottom of the sealing assembly (80) and the top of the partition (702), Wherein, a stabilizing spring (705) is arranged between the two groups of baffles (704), and the stabilizing spring (705) is arranged on the outside of the extraction pipe (701).

2. A hydrofluoric acid sealed sampling device according to claim 1, characterized in that: The sealing component (80) is installed on the outer side of the top of the extraction pipeline (701), and the top of the extraction pipeline (701) is connected to the sampling control component (90).

3. A hydrofluoric acid sealed sampling device according to claim 2, characterized in that: The sealing assembly (80) comprises: a sealing sleeve (801), the sealing sleeve (801) being installed at the center of the top of the storage tank (10), a buffer seat (802) being installed on the top of the sealing sleeve (801), and the top of the buffer seat (802) supporting the sampling control assembly (90); and A waterproof ring (803), the waterproof ring (803) being installed on the inner bottom of the sealing sleeve (801), a protective ring (804) being arranged on the top of the waterproof ring (803), a bearing (805) being arranged on the inner side of the protective ring (804), a sealing ring (806) being arranged on the top of the inner top of the sealing sleeve (801), The extraction pipe (701) is provided through the interior of the waterproof ring (803), the bearing (805) and the sealing ring (806).

4. A hydrofluoric acid sealed sampling device according to claim 3, characterized in that: The sampling control component (90) comprises: An external frame (901), the external frame (901) being mounted on the top of the buffer seat (802), an extraction pump (902) being arranged on the inner side of the external frame (901), the extraction pump (902) being connected to the extraction pipeline (701); A central valve (903), the central valve (903) being installed on the inner side of the external frame (901) and being connected to the output end of the extraction pump (902), an outer tube body (904) being installed on the top of the central valve (903), The middle-through valve (903) and the outer tube (904) are movably connected to a piston (905) inside, the top of the piston (905) is connected to a connecting shaft (906), the connecting shaft (906) is connected to the output end of a servo electric cylinder (907), the servo electric cylinder (907) is mounted on the top of a cylinder seat (9071), and the cylinder seat (9071) is mounted on the top of the external frame (901); and an infusion tube (908), the infusion tube (908) being connected to the side of the middle-through valve (903) and communicating with the infusion port (9031); the infusion tube (908) being arranged through the sealing cover (602) and extending to the interior of the sampling tube (60); Wherein, the infusion port (9031) is opened inside the center-through valve (903).

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