Chemical sampling robot and safety protection system thereof

Abstract

The chemical sampling robot comprises a fixing mechanism, an air inlet mechanism, an opening and closing mechanism, a suction mechanism and a filtering mechanism, one side of the bottom end of a shell is rotationally connected with a cover plate through a pin shaft, an exhaust hole and a filtering hole are formed in the top end of the shell, and the opening and closing mechanism is connected with the cover plate through a pin shaft. And the position, located at the center of the exhaust hole and the filter hole, of the top end of the shell is penetrated and rotationally connected with a conduction valve, a liquid storage bottle is placed in the shell, and a screw cap is arranged at the top end of the liquid storage bottle. By arranging the opening and closing mechanism and the suction mechanism, non-contact sampling of highly toxic chemicals is achieved, and the sampling amount each time is a fixed value; by arranging the air inlet mechanism and the filtering mechanism, totally-closed sampling is achieved, and the sampling height can be freely adjusted; by arranging the fixing mechanism and the protection system, the nitrogen concentration and the atmospheric pressure in the device are monitored in real time in the sampling process.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical sampling, in particular to a chemical sampling robot and a safety protection system thereof. Background Art

[0002] Chemical sampling robots are devices used to automatically extract and collect samples from chemical storage, production, or processing environments. They are equipped with safety precautions to ensure the safety of both operators and the environment. These devices are typically used in situations requiring high levels of safety control, such as handling hazardous chemicals, corrosive liquids, or toxic gases.

[0003] After searching, the Chinese patent with patent number CN118624290A includes an isolation box, a nitrogen replacement device, an exhaust gas recovery device and a gas concentration detection device. Isolation gloves are extended inward on both sides of the isolation box to facilitate operation by the staff. The isolation gloves are set for left and right hands. The nitrogen replacement device and the exhaust gas recovery device are both connected to the isolation box. The gas concentration detection device is installed in the isolation box. The isolation box is an open box with a door at the front end. The isolation box is sealed and airtight in the closed state.

[0004] In the above patent, sampling operations are performed through an isolation box and isolation gloves to achieve closed sampling, avoid contact between operators and materials, and prevent material volatilization and leakage to the outside world, thereby enhancing operational safety and ensuring the health of operators.

[0005] However, the above patent still adopts a manual sampling method. Human errors are prone to occur during multiple sampling processes. The repeated contact between the isolation gloves and the chemicals will also increase the risk of the chemicals gradually penetrating the gloves, thereby affecting the protective effect of the device. On the other hand, when the chemicals are placed in the isolation box, the outside air is simultaneously filled into the isolation box. Furthermore, the process of introducing nitrogen into the isolation box can only dilute the air in the isolation box, and it is difficult to completely isolate the contact between the chemicals and the air, resulting in some volatile chemicals and the air in the isolation box undergoing side reactions such as oxidation, thereby increasing the difficulty of handling the mixed gas in the subsequent temporary storage box. Summary of the Invention

[0006] The purpose of the present invention is to provide a chemical sampling robot and a safety protection system thereof, which have the advantages of fully enclosed sampling and synchronous protection, and solve the problems raised in the background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a chemical sampling robot, comprising a fixing mechanism arranged on the inner wall of the bottom end of a shell, an air intake mechanism arranged at the center of the top end of the shell, an opening and closing mechanism and a suction mechanism arranged inside the shell, and a filtering mechanism arranged on one side of the top end of the shell, one side of the bottom end of the shell being rotatably connected to a cover plate via a pin, the top end of the shell being provided with an exhaust hole and a filter hole, a position of the top end of the shell being located at the center of the exhaust hole and the filter hole being penetrated and rotatably connected to a conduction valve, a liquid storage bottle being placed inside the shell, and a screw cap being provided on the top end of the liquid storage bottle;

[0008] The air intake mechanism includes a nitrogen pump for injecting nitrogen into the interior of the housing, and the bottom end of the air intake mechanism is respectively connected to the opening and closing mechanism and the suction mechanism;

[0009] The filtering mechanism comprises a temporary storage bin for filtering the mixed gas sampled from the interior of the housing, and the filtering mechanism is in transmission connection with the air intake mechanism.

[0010] Preferably, the fixing mechanism includes a fixing seat fixedly connected to the middle of the inner wall of the bottom end of the shell, the fixing seat is penetrated and rotatably connected with an adjusting shaft, and the outer contour of the adjusting shaft extending from both ends of the fixing seat is provided with mutually opposite threaded portions, and both of the threaded portions are penetrated and screwed with a clamping arm.

[0011] Preferably, the bottom end of the nitrogen pump is penetrated and connected to an air intake pipe for limited rotation, the bottom end of the air intake pipe is penetrated and fixedly connected to a driving wheel, the outer contour of the middle section of the air intake pipe is sleeved with a roller that penetrates and is damped and connected to the center of the top end of the shell, the outer contours on both sides of the bottom end of the roller are fixedly connected to fixed arms located inside the shell, and the top end of the roller is penetrated and fixedly connected to a handle located outside the shell.

[0012] Preferably, the ends of the two fixed arms away from the sleeve roller are penetrated and are respectively connected to the opening and closing mechanism and the suction mechanism, and the opening and closing mechanism is located at the corresponding position directly above the liquid storage bottle.

[0013] Preferably, the opening and closing mechanism includes a positioning shaft 1 which penetrates and is rotationally connected to an end of a fixed arm close to the liquid storage bottle away from the sleeve roller, the bottom end of the positioning shaft 1 is fixedly connected to a driven wheel 1, the bottom end of the driven wheel 1 is fixedly connected to a threaded column, the outer contour of the fixed arm close to the liquid storage bottle at the position penetrated by the positioning shaft 1 is fixedly connected to a positioning frame 1 extending downward, the outer contour of the threaded column is screwed with a tapered sleeve, and the inner transmission connection of the tapered sleeve is connected to a tightening member;

[0014] The bottom end of the first positioning frame is attached to and abuts against the outer contour of the top end of the liquid storage bottle, and the tightening member is composed of three centrosymmetrical semi-conical heads fixedly connected to a connecting spring.

[0015] Preferably, the suction mechanism includes a second positioning shaft which passes through and is rotationally connected to an end of a fixed arm away from the liquid storage bottle and away from the sleeve roller, the bottom end of the second positioning shaft passes through and is fixedly connected to a second driven wheel, the bottom end of the second driven wheel is fixedly connected to an internally threaded tube, and a second positioning frame extending downward is fixedly connected to the outer contour of the fixed arm away from the liquid storage bottle at a position where the second positioning shaft passes through, an externally threaded tube is screwed to the interior of the internally threaded tube, and a rubber head is fixedly connected to and communicated with the top end of the externally threaded tube;

[0016] The second positioning frame has the same structural configuration as the first positioning frame and is also adapted to the outer contour of the top end of the liquid storage bottle. The rubber head is made of rubber material.

[0017] Preferably, the temporary storage bin is fixedly connected to the outer contour of the top end of the shell at a position corresponding to the filter hole, and an electric valve is penetrated and rotatably connected to the center of the top end of the temporary storage bin. The electric valve is penetrated and screwed with a lifting column located inside the temporary storage bin, and the bottom end of the lifting column is fixedly connected to a suction and pressure plate corresponding to the size of the inner wall of the temporary storage bin, and a transmission belt with the other end sleeved on the outer contour of the top end of the intake pipe is rotatably connected to the outer contour of the top end of the electric valve.

[0018] A chemical sampling safety protection system includes a processor, a nitrogen concentration detector, and a pressure detector;

[0019] The nitrogen concentration detector is disposed inside the housing and is configured to send a data signal to the processor;

[0020] The pressure detector is disposed inside the housing and is configured to send a data signal to the processor;

[0021] The processor is electrically connected to the conduction valve and the electric valve respectively and is configured to receive and process a data signal and then send a corresponding control signal.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention realizes contactless sampling of highly toxic chemicals by setting an opening and closing mechanism and a suction mechanism, and the sampling volume each time is a fixed value, which effectively reduces the human error in the process of multiple sampling and further improves the protection effect of the device.

[0024] 2. The present invention realizes fully enclosed sampling and freely adjustable sampling height by setting an air intake mechanism and a filtering mechanism, further improving the degree of automation of the device while adapting to chemical storage bottles with different liquid level heights.

[0025] 3. The present invention provides a fixing mechanism and a protection system to monitor the nitrogen concentration and atmospheric pressure in the device in real time during the sampling process, thereby further improving the safety performance of the device and achieving dynamic adjustment of the sampling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 It is a partial cross-sectional view of the main structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the shell structure of the present invention;

[0029] Figure 4 This is an exploded schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 5 This is an exploded cross-sectional view of the air intake mechanism of the present invention;

[0031] Figure 6 This is an exploded cross-sectional view of the opening and closing mechanism of the present invention;

[0032] Figure 7 This is an exploded cross-sectional view of the suction mechanism of the present invention;

[0033] Figure 8 This is an exploded cross-sectional view of the filter mechanism of the present invention;

[0034] Figure 9 It is the overall working flow diagram of the protection system of the present invention.

[0035] In the figure: 1. Shell; 11. Cover plate; 12. Exhaust hole; 13. Filter hole; 14. Conducting valve; 15. Liquid storage bottle; 16. Screw cap; 2. Fixed seat; 21. Adjusting shaft; 22. Threaded part; 23. Clamping arm; 3. Nitrogen pump; 31. Inlet pipe; 32. Driving wheel; 33. Sleeve roller; 34. Fixed arm; 35. Handle; 4. Positioning shaft 1; 41. Driven wheel 1; 42. Threaded column; 43. Positioning frame 1; 44. Tapered sleeve; 45. Tightening piece; 5. Positioning shaft 2; 51. Driven wheel 2; 52. Internally threaded pipe; 53. Positioning frame 2; 54. Externally threaded pipe; 55. Glue head; 6. Temporary storage bin; 61. Electric valve; 62. Lifting column; 63. Pumping plate; 64. Transmission belt. DETAILED DESCRIPTION

[0036] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Example 1:

[0038] See also Figures 1 to 9 The present invention provides a technical solution: a chemical sampling robot, comprising a fixing mechanism arranged on the inner wall of the bottom end of a shell 1, an air intake mechanism arranged at the center of the top end of the shell 1, an opening and closing mechanism and a suction mechanism arranged inside the shell 1, and a filtering mechanism arranged on one side of the top end of the shell 1, one side of the bottom end of the shell 1 is rotatably connected to a cover plate 11 through a pin shaft, the top end of the shell 1 is provided with an exhaust hole 12 and a filter hole 13, a position at the center of the exhaust hole 12 and the filter hole 13 at the top end of the shell 1 is penetrated and rotatably connected to a conduction valve 14, a liquid storage bottle 15 is placed inside the shell 1, and a screw cap 16 is provided on the top end of the liquid storage bottle 15;

[0039] The air intake mechanism includes a nitrogen pump 3 for injecting nitrogen into the housing 1. The bottom end of the air intake mechanism is respectively connected to the opening and closing mechanism and the suction mechanism.

[0040] The filtering mechanism includes a temporary storage bin 6 for filtering the mixed gas sampled from the interior of the housing 1 , and the filtering mechanism is in transmission connection with the air intake mechanism.

[0041] In the present invention, the liquid storage bottle 15 is used as a container for storing chemicals in actual use scenarios, and the screw cap 16 represents a universal sealing method for the liquid storage bottle 15 in actual use scenarios. When it is necessary to sample the chemicals in the liquid storage bottle 15, the liquid storage bottle 15 is manually placed inside the housing 1 and the position is adjusted so that the liquid storage bottle 15 is between the fixing mechanisms. The sampling dish is placed just below the suction mechanism inside the housing 1, and then the fixing mechanism is adjusted to clamp and fix the liquid storage bottle 15. Then, the cover 11 is closed to seal the interior of the housing 1.

[0042] Furthermore, the air intake mechanism is opened and adjusted so that the opening and closing mechanism corresponds to the position of the screw cap 16. At this time, nitrogen enters the interior of the shell 1 and discharges the air inside the shell 1 along the exhaust hole 12. After a period of time, the nitrogen concentration inside the shell 1 gradually increases. When the concentration reaches a preset value, the conduction valve 14 rotates to block the exhaust hole 12. At this time, the nitrogen inside the shell 1 is continuously injected but cannot be discharged. After a period of time, the internal pressure of the shell 1 gradually increases. When the pressure reaches a preset value, the filtering mechanism works synchronously, and while completing its own vacuum extraction, the opening and closing mechanism and the suction mechanism are transmitted through the air intake mechanism. The opening and closing mechanism unseals the liquid storage bottle 15 by rotating the screw cap 16, and the suction mechanism samples the chemicals in the liquid storage bottle 15.

[0043] During this process, the working conditions inside the housing 1 can be observed in real time through the cover plate 11 made of transparent material, and the working state of the device can be dynamically adjusted in combination with the feedback data of the protection system.

[0044] Example 2:

[0045] See also Figure 4 This embodiment further illustrates the following based on the first embodiment:

[0046] The fixing mechanism includes a fixing base 2 fixedly connected to the middle of the inner wall of the bottom end of the shell 1, and the fixing base 2 is penetrated and rotatably connected with an adjusting shaft 21. The adjusting shaft 21 extends out of the outer contour of both ends of the fixing base 2 and is provided with mutually opposite threaded portions 22. Both of the threaded portions 22 are penetrated and screwed with a clamping arm 23.

[0047] When the liquid storage bottle 15 is placed inside the shell 1, the operator rotates the adjustment shaft 21, and the two threaded parts 22 rotate synchronously. Under the action of the screw connection, the two clamping arms 23 gradually approach and fit against the outer contour of the liquid storage bottle 15, thereby achieving the clamping and fixing operation of the liquid storage bottle 15. Due to the self-locking nature of the screw connection, the clamping and fixing operation will not be accidentally dislocated during the operation of the device, which effectively improves the safety performance of the device.

[0048] Example 3:

[0049] See also Figure 5 This embodiment further illustrates the following based on the second embodiment:

[0050] The bottom end of the nitrogen pump 3 is penetrated and connected to an air intake pipe 31 for limited rotation. The bottom end of the air intake pipe 31 is penetrated and fixedly connected to a driving wheel 32. A roller 33 that penetrates and is damped and connected to the center of the top end of the shell 1 is sleeved on the outer contour of the middle section of the air intake pipe 31. Fixed arms 34 located inside the shell 1 are fixedly connected to the outer contours on both sides of the bottom end of the roller 33. The top end of the roller 33 is penetrated and fixedly connected to a handle 35 located outside the shell 1.

[0051] The ends of the two fixed arms 34 away from the sleeve roller 33 are penetrated and are respectively connected to the opening and closing mechanism and the suction mechanism. The opening and closing mechanism is located at a corresponding position directly above the liquid storage bottle 15.

[0052] Furthermore, after the clamping and fixing is completed, the cover plate 11 is closed to seal the shell 1. At this time, the inside and outside of the shell 1 are connected through the exhaust hole 12. The air intake mechanism is opened to continuously inject nitrogen into the inside of the shell 1. The nitrogen is injected into the inside of the shell 1 from the nitrogen pump 3 along the intake pipe 31, and is discharged along the exhaust hole 12 after mixing with the air inside the shell 1. During this process, the overall pressure inside the shell 1 remains basically unchanged, while the nitrogen concentration gradually increases.

[0053] It should be noted that the damping connection between the sleeve roller 33 and the shell 1 specifically adopts the friction contact method of the rubber sleeve. While ensuring that the sleeve roller 33 can freely adjust the height and rotation angle, the height of the sleeve roller 33 will not deviate without external force, further avoiding the dislocation of the sleeve roller 33 during the operation of the device.

[0054] At the same time, the operator manually adjusts the height of the sleeve roller 33 by controlling the handle 35, thereby controlling the length of the sleeve roller 33 extending into the interior of the shell 1 to achieve height adjustment for overall unsealing and sampling. As the height of the sleeve roller 33 decreases, the fixed arm 34 drives the opening and closing mechanism and the suction mechanism to decrease synchronously until the opening and closing mechanism comes into contact with the rotary cover 16.

[0055] Example 4:

[0056] See also Figure 8 This embodiment further illustrates the following on the basis of the third embodiment:

[0057] The temporary storage bin 6 is fixedly connected to the outer contour of the top end of the shell 1 at a position corresponding to the filter hole 13. An electric valve 61 is penetrated and rotatably connected to the center of the top end of the temporary storage bin 6. The electric valve 61 is penetrated and screwed with a lifting column 62 located inside the temporary storage bin 6. The bottom end of the lifting column 62 is fixedly connected to a suction and pressure plate 63 corresponding to the inner wall size of the temporary storage bin 6. A transmission belt 64, the other end of which is sleeved on the outer contour of the top end of the intake pipe 31, is rotatably connected to the outer contour of the top end of the electric valve 61.

[0058] Furthermore, after a period of nitrogen injection, the nitrogen concentration inside housing 1 reaches a threshold, and filter hole 13 begins to rotate and block exhaust hole 12, thereby eliminating the connection between the inside and outside of housing 1. At this point, housing 1 is completely sealed. Continued nitrogen injection causes the pressure inside housing 1 to gradually increase. The high-pressure environment increases the external pressure on the molecules on the liquid surface, making it more difficult for the liquid molecules to escape into the gas phase. As the air pressure rises, the vapor pressure of the chemical will find it more difficult to reach ambient pressure, and the volatilization rate will slow accordingly, effectively suppressing the volatilization of the chemical. Nitrogen is an inert gas that does not react with most chemicals. Therefore, during the sampling process, nitrogen can act as a protective gas, preventing the chemical from coming into contact with oxygen in the air, preventing chemical reactions and the production of harmful gases.

[0059] When the internal pressure of the shell 1 reaches the threshold, the electric valve 61 starts to rotate and drives the lifting column 62 and the pressure plate 63 to spirally rise. At this time, the filter hole 13 is in a blocked state, and the spiral rise of the pressure plate 63 realizes the vacuum treatment of the interior of the temporary storage bin 6, thereby adjusting the interior of the temporary storage bin 6 to a negative pressure state.

[0060] At the same time, the electric valve 61 synchronously drives the transmission belt 64 and realizes the rotation of the intake pipe 31 in the intake mechanism. The intake pipe 31 further drives the driving wheel 32 and realizes the operation of the opening and closing mechanism and the suction mechanism.

[0061] Embodiment 5:

[0062] See also Figure 6-Figure 7 This embodiment further illustrates the following based on the fourth embodiment:

[0063] The opening and closing mechanism includes a positioning shaft 4 that penetrates and is limitedly rotatably connected to an end of a fixed arm 34 near the liquid storage bottle 15 away from the sleeve roller 33. The bottom end of the positioning shaft 4 is fixedly connected to a driven wheel 41, and the bottom end of the driven wheel 41 is fixedly connected to a threaded column 42. A downwardly extending positioning frame 43 is fixedly connected to the outer contour of the fixed arm 34 near the liquid storage bottle 15 at the position penetrated by the positioning shaft 4. A tapered sleeve 44 is screwed on the outer contour of the threaded column 42, and a tightening member 45 is connected to the interior of the tapered sleeve 44 in a transmission manner.

[0064] The bottom end of the positioning frame 1 43 is attached to and abuts against the outer contour of the top end of the liquid storage bottle 15 , and the tightening member 45 is composed of three centrosymmetrical semi-conical heads fixedly connected to a connecting spring.

[0065] The suction mechanism includes a second positioning shaft 5 that penetrates and is limitedly rotatably connected to an end of a fixed arm 34 away from the liquid storage bottle 15 and away from the sleeve roller 33. The bottom end of the second positioning shaft 5 penetrates and is fixedly connected to a second driven wheel 51. The bottom end of the second driven wheel 51 is fixedly connected to an internally threaded tube 52. A second positioning frame 53 extending downward is fixedly connected to the outer contour of the fixed arm 34 away from the liquid storage bottle 15 at the position penetrated by the second positioning shaft 5. An externally threaded tube 54 is screwed to the interior of the internally threaded tube 52. The top end of the externally threaded tube 54 is fixedly connected and communicated with a glue head 55.

[0066] The second positioning frame 53 has the same structural configuration as the first positioning frame 43 and is also adapted to the outer contour of the top end of the liquid storage bottle 15 . The rubber head 55 is made of rubber.

[0067] When the driving wheel 32 rotates, the driven wheel 141 drives the positioning shaft 14 and the threaded column 42 to rotate synchronously. At this time, the rotary cover 16 contacts and squeezes the inner wall of the tightening member 45. The tightening member 45 further squeezes the tapered sleeve 44, so that a displacement difference occurs between the tapered sleeve 44 and the threaded column 42. At this time, under the action of the screw connection between the tapered sleeve 44 and the threaded column 42, the tapered sleeve 44 slowly rises along the threaded column 42, and the tightening member 45 rises synchronously with the tapered sleeve 44. When it rises to the point where the tightening member 45 contacts the threaded column 42, When the screw cap 16 is tightened, the tightening piece 45 is unable to rise due to the restriction of the threaded column 42, while the conical sleeve 44 continues to rise under the action of the screw connection, thereby increasing the pressure between the conical sleeve 44 and the tightening piece 45, and the tightening piece 45 is gradually compressed and clamps the screw cap 16; further, during the rising process of the conical sleeve 44, the threaded column 42 drives the conical sleeve 44, the tightening piece 45 and the screw cap 16 to rotate synchronously under the action of the screw connection, and the liquid storage bottle 15 is clamped and fixed, so that the liquid storage bottle 15 can be unsealed by rotating the screw cap 16.

[0068] When the liquid storage bottle 15 needs to be resealed, the electric valve 61 can be rotated in the reverse direction. At this time, the reverse rotation of the threaded column 42 realizes the tightening of the screw cap 16 on the liquid storage bottle 15, and gradually reduces the pressure between the tightening member 45 and the tapered sleeve 44, so that the tightening member 45 is reset to release the clamping state of the screw cap 16, thereby realizing the resealing of the liquid storage bottle 15.

[0069] After the unsealing operation of the liquid storage bottle 15 is completed, the handle 35 is turned and the height is adjusted so that the external threaded tube 54 is inserted into the liquid storage bottle 15. At this time, the driving wheel 32 drives the driven wheel 2 51, the positioning shaft 2 5 and the internal threaded tube 52 to rotate synchronously, and the external threaded tube 54 contacts and squeezes the inner wall of the liquid storage bottle 15, so that a displacement difference occurs between the external threaded tube 54 and the internal threaded tube 52. Further, under the screw connection between the internal threaded tube 52 and the external threaded tube 54, the external threaded tube 54 and the rubber head 55 are synchronously lowered. When it is lowered to the rubber head 5 When the outer threaded tube 54 contacts the second positioning shaft 5, the continued descent of the outer threaded tube 54 causes the rubber head 55 to be squeezed, thereby injecting the nitrogen inside the outer threaded tube 54 into the chemicals in the liquid storage bottle 15. As a protective gas, the nitrogen will not affect the performance of the chemicals. At this time, the outer threaded tube 54 is in a negative pressure state. The electric valve 61 is rotated in the reverse direction, causing the outer threaded tube 54 and the rubber head 55 to rise again. The squeezing of the rubber head 55 by the second positioning shaft 5 is released, and the chemical liquid in the liquid storage bottle 15 is sucked into the outer threaded tube 54, thereby completing the suction operation.

[0070] It should be noted that, during the suction operation, the external threaded tube 54 is lifted and lowered once, at which time the conical sleeve 44 of the opening and closing mechanism is lifted and lowered synchronously, and the screw cap 16 is not in contact with the liquid storage bottle 15 at this time because the synchronous opening and closing mechanism and the suction mechanism are swapped in position, and the tightening member 45 always clamps the screw cap 16 to ensure that the screw cap 16 does not fall off accidentally; similarly, during the opening and closing operation, the conical sleeve 44 rises during unsealing and falls during sealing, and the external threaded tube 54 moves synchronously at this time and falls synchronously during sealing, accompanied by the re-squeezing of the rubber head 55 by the positioning shaft 2 5, and the chemical liquid sucked in the external threaded tube 54 is discharged into the sampling dish below to complete the overall sampling process.

[0071] Example 6:

[0072] See also Figure 9 This embodiment further illustrates the following based on the fifth embodiment:

[0073] A chemical sampling safety protection system includes a processor, a nitrogen concentration detector, and a pressure detector;

[0074] The nitrogen concentration detector is disposed inside the housing 1 and is configured to send a data signal to the processor;

[0075] The pressure detector is disposed inside the housing 1 and is configured to send a data signal to the processor;

[0076] The processor is electrically connected to the conduction valve 14 and the electric valve 61 respectively and is configured to receive and process data signals and then send corresponding control signals.

[0077] The overall process of device operation is divided into five stages:

[0078] S1. Exhaust: The exhaust hole 12 is connected, and the nitrogen pump 3 continuously injects nitrogen into the shell 1 to increase the nitrogen concentration inside the shell 1 and exhaust the air inside the shell 1 along the exhaust hole 12. This process is to reduce the chemical reaction between the air inside the shell 1 and the volatile gas of the chemicals in the liquid storage bottle 15 during the unsealing process, thereby increasing the difficulty of subsequent filtration processing.

[0079] S2. Pressurization: When the nitrogen concentration detector detects that the nitrogen concentration inside the shell 1 reaches a threshold value, the processor controls the conduction valve 14 to rotate. The conduction valve 14 rotates to fully seal the exhaust hole 12 and the filter hole 13. The nitrogen pump 3 continuously injects nitrogen into the shell 1 to increase the internal pressure of the shell 1. This process is to reduce the volatilization rate of the chemicals in the liquid storage bottle 15 during the unsealing process, thereby further improving the protection performance of the device.

[0080] S3. Unsealing: When the pressure detector detects that the air pressure inside the shell 1 reaches the threshold, the processor controls the electric valve 61 to rotate, the opening and closing mechanism rises, and the unsealing operation of the liquid storage bottle 15 is realized by rotating the screw cap 16. Then, under the limiting action of the positioning frame 1 43 and the positioning frame 2 53, the roller 33 is rotated to exchange the positions of the opening and closing mechanism and the suction mechanism, and the height of the roller 33 is readjusted.

[0081] S4. Sampling: The processor controls the electric valve 61 to rotate in the opposite direction and then in the opposite direction again. The suction mechanism synchronously descends and then rises. The external threaded tube 54 sucks the chemicals in the liquid storage bottle 15 by squeezing the rubber head 55 by the positioning shaft 2 5. Then, the sleeve roller 33 is rotated again to reset the opening and closing mechanism and the suction mechanism. Then, the electric valve 61 is reversed again. The opening and closing mechanism realizes the resealing operation, and the suction mechanism injects the sucked sample into the sampling dish to complete the overall sampling operation.

[0082] S5. Filtration: The processor controls the conduction valve 14 to rotate, the conduction valve 14 closes the exhaust hole 12, and the filter hole 13 is connected. The nitrogen pump 3 continuously injects nitrogen into the interior of the shell 1 and carries a small amount of chemical volatile gas into the temporary storage bin 6 along the filter hole 13. In the temporary storage bin 6, the chemical volatile gas is filtered through existing technical means such as adsorption, condensation or chemical absorption. In this process, since the interior of the temporary storage bin 6 is in a negative pressure environment, the rate at which the mixed gas enters the temporary storage bin 6 is effectively increased to increase the filtration rate.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A chemical sampling robot, comprising a fixing mechanism arranged on the inner wall of the bottom end of a shell (1), an air intake mechanism arranged at the center of the top end of the shell (1), an opening and closing mechanism and a suction mechanism arranged inside the shell (1), and a filtering mechanism arranged on one side of the top end of the shell (1), characterized in that: A cover plate (11) is rotatably connected to one side of the bottom end of the shell (1) via a pin shaft, an exhaust hole (12) and a filter hole (13) are provided at the top end of the shell (1), a conducting valve (14) is penetrated and rotatably connected at a position located at the center of the exhaust hole (12) and the filter hole (13) at the top end of the shell (1), a liquid storage bottle (15) is placed inside the shell (1), and a screw cap (16) is provided at the top end of the liquid storage bottle (15); The air intake mechanism comprises a nitrogen pump (3) for injecting nitrogen into the interior of the housing (1); the bottom end of the air intake mechanism is respectively connected in transmission with the opening and closing mechanism and the suction mechanism; The filtering mechanism comprises a temporary storage bin (6) for filtering the mixed gas sampled from the interior of the housing (1), and the filtering mechanism is in transmission connection with the air intake mechanism.

2. A chemical sampling robot according to claim 1, characterized in that: The fixing mechanism comprises a fixing seat (2) fixedly connected to the middle of the inner wall of the bottom end of the shell (1); an adjusting shaft (21) is passed through and rotatably connected to the fixing seat (2); the adjusting shaft (21) extends out of the outer contours of both ends of the fixing seat (2) and is provided with mutually opposite threaded portions (22); the two threaded portions (22) are both passed through and screwed with a clamping arm (23).

3. The chemical sampling robot according to claim 1, characterized in that: The bottom end of the nitrogen pump (3) is penetrated and connected to an air intake pipe (31) in a limited rotation manner. The bottom end of the air intake pipe (31) is penetrated and fixedly connected to a driving wheel (32). The outer contour of the middle section of the air intake pipe (31) is sleeved with a sleeve roller (33) that penetrates and is damped and connected to the center of the top end of the shell (1). The outer contours on both sides of the bottom end of the sleeve roller (33) are fixedly connected to fixed arms (34) located inside the shell (1). The top end of the sleeve roller (33) is penetrated and fixedly connected to a handle (35) located outside the shell (1).

4. The chemical sampling robot according to claim 3, characterized in that: The ends of the two fixed arms (34) away from the sleeve roller (33) are penetrated and are respectively connected to the opening and closing mechanism and the suction mechanism. The opening and closing mechanism is located at a corresponding position directly above the liquid storage bottle (15).

5. The chemical sampling robot according to claim 1, characterized in that: The opening and closing mechanism includes a positioning shaft (4) that penetrates and is rotationally connected to an end of a fixed arm (34) close to the liquid storage bottle (15) away from the sleeve roller (33), the bottom end of the positioning shaft (4) is fixedly connected to a driven wheel (41), the bottom end of the driven wheel (41) is fixedly connected to a threaded column (42), the outer contour of the fixed arm (34) close to the liquid storage bottle (15) at the position penetrated by the positioning shaft (4) is fixedly connected to a positioning frame (43) extending downward, the outer contour of the threaded column (42) is screwed with a tapered sleeve (44), and the inner transmission connection of the tapered sleeve (44) is a tightening member (45); The bottom end of the positioning frame (43) is attached to and abuts against the outer contour of the top end of the liquid storage bottle (15), and the tightening member (45) is composed of three centrosymmetrical semi-conical heads fixedly connected to a connecting spring.

6. The chemical sampling robot according to claim 1, characterized in that: The suction mechanism includes a positioning shaft (5) that penetrates and is limitedly rotatably connected to an end of a fixed arm (34) away from the liquid storage bottle (15) and away from the sleeve roller (33); the bottom end of the positioning shaft (5) penetrates and is fixedly connected to a driven wheel (51); the bottom end of the driven wheel (51) is fixedly connected to an internal threaded tube (52); the outer contour of the fixed arm (34) away from the liquid storage bottle (15) is fixedly connected to a positioning frame (53) extending downward at the position penetrated by the positioning shaft (5); the interior of the internal threaded tube (52) is screwed with an external threaded tube (54); the top end of the external threaded tube (54) is fixedly connected and communicated with a rubber head (55); The second positioning frame (53) is structurally consistent with the first positioning frame (43) and is also adapted to the outer contour of the top end of the liquid storage bottle (15). The rubber head (55) is made of rubber material.

7. The chemical sampling robot according to claim 1, characterized in that: The temporary storage bin (6) is fixedly connected to a position on the outer contour of the top end of the housing (1) corresponding to the filter hole (13); an electric valve (61) is penetrated and rotatably connected to the center of the top end of the temporary storage bin (6); the electric valve (61) is penetrated and screwed to a lifting column (62) located inside the temporary storage bin (6); the bottom end of the lifting column (62) is fixedly connected to a pressure plate (63) corresponding to the size of the inner wall of the temporary storage bin (6); and a transmission belt (64) is rotatably connected to the outer contour of the top end of the electric valve (61), the other end of which is sleeved on the outer contour of the top end of the intake pipe (31).

8. A chemical sampling safety protection system, applied to a chemical sampling robot according to any one of claims 1 to 7, characterized in that: Including a processor, a nitrogen concentration detector and a pressure detector; The nitrogen concentration detector is arranged inside the housing (1) and is configured to send a data signal to the processor; The pressure detector is arranged inside the housing (1) and is configured to send a data signal to the processor; The processor is electrically connected to the conduction valve (14) and the electric valve (61) respectively and is configured to receive and process data signals and then send corresponding control signals.

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