A gas monitoring device for working environment in confined spaces

Abstract

The present invention relates to the technical field of toxic gas monitoring, and specifically relates to a gas monitoring device for a confined space operation environment, which includes a housing, a controller and an audible and visual alarm. An air cavity is provided inside the housing. A pushing component, a detection component and a sealing component are provided in the housing. The pushing component includes a cylinder, a through hole and a push plate. The detection component includes a servo motor and a rotating disk. A number of gas storage cylinders are circumferentially arranged on the rotating disk. A harmful gas sensor is provided in the gas storage cylinder. The sealing component includes a mounting plate and a water through hole. A micro motor, a baffle a and a baffle b are provided in the mounting plate. An air inlet and a water inlet are provided on the mounting plate. A piston is provided in the water through hole. The cylinder drives the push plate to push the air in the air cavity into the gas storage cylinder for detection by the harmful gas sensor. When the push plate descends, the micro motor drives the baffle a and the baffle b to seal the air inlet, and at the same time the piston squeezes the water in the water through hole into the space between the baffle a and the baffle b for further sealing, so as to make the detection result more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of toxic gas monitoring, and particularly to a gas monitoring device for a confined space operation environment. Background Art

[0002] Harmful gases in the confined space operation environment are an important and strictly managed safety issue. Confined spaces generally refer to enclosed or partially enclosed spaces with poor natural ventilation, which are prone to the accumulation of toxic and harmful gases, flammable and explosive substances, or insufficient oxygen content, posing potential safety hazards to operators. This is particularly important in industries such as biochemistry, biopharmaceuticals, and chemical engineering. When experimenters conduct experiments in confined spaces such as biochemistry laboratories, various harmful gases may be generated, such as formaldehyde, chlorine, ammonia, carbon monoxide, etc. These gases pose a serious threat to human health, and long-term exposure may lead to poisoning, cancer, or other health problems. Therefore, it is necessary to monitor the gases through a monitoring device, promptly detect harmful gases and give an alarm to prevent damage to personnel health. The monitoring devices of the prior art usually lack an effective sealing function. After the gas enters the monitoring device, it cannot be effectively sealed inside the monitoring device, resulting in inaccurate detection results and affecting the timely alarm of the monitoring device. Moreover, the monitoring devices of the prior art cannot effectively store harmful gases, which is not conducive to the subsequent research and analysis of the harmful gases generated in the experiment.

[0003] A Chinese invention patent with the publication number CN117630293A discloses a toxic gas monitoring and sampling device for confined space operations, including a housing, and further including: a timing sampling assembly installed inside the housing and communicating with the outside of the space for regularly sampling the air inside the space; a first detection box body and a second detection box body for providing a separate detection space for the sampled gas; a toxic gas sensor installed inside the first detection box body for detecting toxic gases in the sampled gas; and an oxygen detector installed inside the second detection box body. Through the setting of the timing sampling assembly and the equal division pushing assembly, during the process of monitoring the gas, the test gas is stored simultaneously, which is beneficial to retaining the gas sample at the same time when the gas is detected to be abnormal, thus facilitating the subsequent in-depth analysis and detection of the sample gas.

[0004] Although it can separate and seal the gas entering the monitoring device to a certain extent through the equal division pushing assembly, the method of only relying on the partition board for separation and sealing may still have gaps, resulting in gas leakage and thus affecting the accuracy of the detection results. Summary of the Invention

[0005] The object of the present invention is to provide a gas monitoring device for a confined space operation environment in view of the deficiencies of the prior art. The device includes a housing, a controller disposed inside the housing, and an audible and visual alarm disposed on the top of the housing. An air chamber is opened inside the housing. A pushing component is disposed inside the housing. A detection component is disposed below the air chamber. A sealing component is disposed on one side of the air chamber. The pushing component includes a cylinder fixedly disposed above the air chamber and a through hole opened at the bottom of the air chamber. A push plate is fixedly connected to the front end of the cylinder. The detection component includes a servo motor fixedly disposed below the air chamber and a rotating disk driven by the servo motor. A plurality of gas storage cylinders are circumferentially disposed on the rotating disk. A harmful gas sensor is disposed inside the gas storage cylinder. The sealing component includes a mounting plate fixedly disposed on the left side of the air chamber and a water through hole opened inside the housing. A micro motor is fixedly disposed inside the mounting plate, and a baffle a and a baffle b driven by the micro motor. An air inlet is opened on the mounting plate. A water inlet communicating with the water through hole is opened at the bottom of the mounting plate. A piston is disposed inside the water through hole, solving the problem that the prior art has a poor sealing effect and easily affects the accuracy of the detection result.

[0006] The technical solution measures of the present invention are as follows:

[0007] A gas monitoring device for a confined space operation environment includes a housing, a controller disposed inside the housing, and an audible and visual alarm disposed on the top of the housing. An air chamber is opened inside the housing. A pushing component is disposed inside the housing. A detection component is disposed below the air chamber. A sealing component is disposed on one side of the air chamber. The pushing component includes a cylinder fixedly disposed above the air chamber and a through hole opened at the bottom of the air chamber. A push plate is fixedly connected to the front end of the cylinder. The detection component includes a servo motor fixedly disposed below the air chamber and a rotating disk driven by the servo motor. A plurality of gas storage cylinders are circumferentially disposed on the rotating disk. A harmful gas sensor is disposed inside the gas storage cylinder. The sealing component includes a mounting plate fixedly disposed on the left side of the air chamber and a water through hole opened inside the housing. A micro motor is fixedly disposed inside the mounting plate, and a baffle a and a baffle b driven by the micro motor. An air inlet is opened on the mounting plate. A water inlet communicating with the water through hole is opened at the bottom of the mounting plate. A piston is disposed inside the water through hole. The cylinder drives the push plate to push the air in the air chamber into the gas storage cylinder, and the air is detected by the harmful gas sensor. During the descending process of the push plate, the micro motor drives the baffle a and the baffle b to seal the air inlet, and at the same time, the piston squeezes the water in the water through hole into the space between the baffle a and the baffle b through the water inlet for further sealing.

[0008] As a preference, the pushing component further includes a sleeve slidably disposed inside the through hole and a touch switch a fixedly disposed on the top of the air chamber. A spring a is sleeved on the sleeve, and the other end of the spring a is fixedly connected to the bottom of the air chamber.

[0009] As a preference, the detection component further includes a guide rail fixedly arranged above the rotating disk. A number of support rods are correspondingly arranged on the top of the rotating disk with respect to the guide rail. A spherical ball which is slidably arranged in the guide rail is fixedly arranged at the top end of the support rod. Threaded mounting holes for mounting the air storage cylinder are circumferentially formed on the rotating disk.

[0010] As a preference, external threads are arranged on the outer side of the air storage cylinder corresponding to the threaded mounting holes. An electromagnetic valve is arranged at the top of the air storage cylinder. A touch switch b is arranged at the top of the electromagnetic valve.

[0011] As a preference, a chute is formed on the mounting plate. An installation groove for installing a micro motor is formed at the top of the chute. A limiting hole is formed at the bottom of the chute. A rectangular groove a and a rectangular groove b are symmetrically formed at the bottom of the chute. A gear is rotatably arranged in the limiting hole. One end of the gear is connected with the micro motor.

[0012] As a preference, a rack a and a rack b are slidably arranged in the chute. Both the rack a and the rack b are meshed with the gear. A connecting rod a which is slidably arranged in the rectangular groove a is fixedly connected to the bottom of the rack a. The other end of the connecting rod a is fixedly connected with a baffle a. A connecting rod b which is slidably arranged in the rectangular groove b is fixedly connected to the bottom of the rack b. The other end of the connecting rod b is fixedly connected with a baffle b.

[0013] As a preference, a storage groove a and a storage groove b are respectively formed in the mounting plate corresponding to the baffle a and the baffle b.

[0014] As a preference, an auxiliary ring is fixedly arranged in the middle of the piston. A spring b is sleeved on the piston. Two ends of the spring b are respectively connected with the water through hole and the auxiliary ring.

[0015] As another preference, a panel is arranged on the front surface of the housing. A door panel is hinged on the panel. An exhaust hole is formed on the right side of the housing. A handle is fixedly arranged at the top of the housing.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention is provided with a pushing component. During the process that the air cylinder in the pushing component drives the push plate to descend and press the gas in the air chamber down into the air storage cylinder below, when the push plate descends and disconnects from the touch switch a, the touch switch a sends a signal to the controller. The controller sends a signal to control the micro motor to start and drive the baffle a and the baffle b to close the air inlet to seal the air chamber. At the same time, during the descending process of the push plate, the piston is pushed by the air pressure to squeeze the water in the water through hole into the space between the baffle a and the baffle b to further seal the air chamber. The linkage effect among the components is good, and the synchronism is good. The gas in the air chamber can be timely sealed and pressed into the air storage cylinder through the push plate for detection, ensuring the accuracy of the detection result.

[0018] The present invention is provided with a sealing assembly. When the air cylinder drives the push plate to descend, the controller immediately controls the micro motor to start, and drives the rack a and the rack b to move in opposite directions through the gear, so that the baffle a and the baffle b close the air inlet, achieving a preliminary sealing effect. At the same time, during the process of the push plate pressing down the gas, the piston in the water passing hole is driven forward by the air pressure to squeeze the water in the water passing hole into the space between the baffle a and the baffle b from the water inlet, further sealing the closed space formed between the baffle a and the baffle b, making the sealing effect better, and avoiding the problem that the gas in the air cavity overflows during the pressing process, which affects the accuracy of the detection result.

[0019] The present invention is provided with a detection assembly. The servo motor in the detection assembly can drive the rotating disk equipped with a plurality of gas storage cylinders to rotate circumferentially at regular intervals under the action of the controller. When the air cylinder drives the push plate to descend and press down the gas, the air pressure drives the sleeve slidingly arranged in the through hole to slide down. The sleeve contacts the touch switch b on the top of the solenoid valve on the top of the gas storage cylinder, and the touch switch b sends a signal to the controller. The controller sends a signal to open the solenoid valve, so that the gas in the air cavity can enter the gas storage cylinder for detection by the harmful gas sensor. After the detection is completed, the push plate resets. The servo motor drives the rotating disk to rotate 90°, so that the next gas storage cylinder is switched below the air cavity to wait for the next round of detection. By setting a plurality of gas storage cylinders, not only can the detected gas be retained for subsequent research and analysis, but also continuous sampling can be satisfied. When it is necessary to re-detect or continuously detect the space, continuous sampling can be carried out to avoid errors in the detection results.

[0020] In summary, the present invention has the advantages of better sealing effect, guaranteed accuracy of detection results, good linkage of each component, good synchronization effect, ingenious structure, etc., and is suitable for the technical field of toxic gas monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following further describes the present invention with reference to the drawings:

[0022] Figure 1 It is a schematic structural diagram of the gas monitoring device for the confined space operation environment;

[0023] Figure 2 It is a schematic side structure diagram of the gas monitoring device for the confined space operation environment;

[0024] Figure 3 It is a schematic position structure diagram of the detection assembly;

[0025] Figure 4 It is a schematic position structure diagram of the sealing assembly;

[0026] Figure 5 It is a schematic structural diagram of the detection assembly;

[0027] Figure 6 Schematic diagram of the state where the pushing component presses gas into the detection component when the sealing component seals the air cavity;

[0028] Figure 7 It is Figure 6 Enlarged schematic diagram at position A of

[0029] Figure 8 Schematic cross-sectional structure diagram of the mounting plate;

[0030] Figure 9 Schematic diagram of the state when the micro motor drives the rack a and the rack b to move in the reverse direction and reset through gears;

[0031] Figure 10 Schematic diagram of the state when the baffle a and the baffle b do not seal the air cavity.

[0032] In the figure: housing 1, controller 2, pushing component 3, detection component 4, sealing component 5, air cavity 11, panel 12, door panel 13, exhaust hole 14, handle 15, sound and light alarm 21, cylinder 31, through hole 32, push plate 33, sleeve 34, touch switch a 35, spring a 36, servo motor 41, rotating disk 42, air storage cylinder 43, harmful gas sensor 44, guide rail 45, support rod 46, ball 47, threaded mounting hole 48, external thread 49, solenoid valve 410, touch switch b 411, mounting plate 51, water through hole 52, micro motor 53, baffle a 54, baffle b 55, air inlet 56, water inlet 57, piston 58, sliding groove 59, mounting groove 510, limiting hole 511, rectangular groove a 512, rectangular groove b 513, gear 514, rack a 515, rack b 516, connecting rod a 517, connecting rod b 518, storage groove a 519, storage groove b 5110, auxiliary ring 5111, spring b 5112. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0034] Embodiment 1

[0035] As Figures 1 to 10As shown, a gas monitoring device for a limited space working environment includes a shell 1, a controller 2 arranged in the shell 1, and an audible and visual alarm 21 arranged on the top of the shell 1. An air cavity 11 is opened inside the shell 1, a pushing component 3 is arranged in the shell 1, a detection component 4 is arranged below the air cavity 11, and a sealing component 5 is arranged on one side of the air cavity 11. The pushing component 3 includes a cylinder 31 fixedly arranged above the air cavity 11 and a through hole 32 opened at the bottom of the air cavity 11. A push plate 33 is fixedly connected to the front end of the cylinder 31. The detection component 4 includes a servo motor 41 fixedly arranged below the air cavity 11 and a rotating disk 42 driven by the servo motor 41. A plurality of air storage cylinders 43 are arranged on the circumference of the rotating disk 42. A harmful gas sensor 44 is arranged in the air storage cylinder 43. The sealing component The housing 1 comprises a mounting plate 51 fixedly arranged on the left side of the air cavity 11 and a water hole 52 provided in the housing 1. A micro motor 53 and baffles a54 and baffles b55 driven by the micro motor 53 are fixedly arranged in the mounting plate 51. An air inlet 56 is provided on the mounting plate 51. A water inlet 57 connected to the water hole 52 is provided at the bottom of the mounting plate 51. A piston 58 is provided in the water hole 52. The cylinder 31 drives the push plate 33 to push the air in the air cavity 11 into the air storage cylinder 43 to detect the air through the harmful gas sensor 44. During the descending process of the push plate 33, the micro motor 53 drives the baffles a54 and baffles b55 to seal the air inlet 56. At the same time, the piston 58 squeezes the water in the water hole 52 through the water inlet 57 into the space between the baffles a54 and baffles b55 for further sealing. When the cylinder 31 drives the push plate 33 to descend, the touch switch a35 is disconnected and then sends a signal to the controller 2. The controller 2 immediately sends a signal to control the micro motor 53 to start and drive the baffle a54 and the baffle b55 to close the air inlet 56 to seal the air cavity 11. At the same time, during the descent process, the push plate 33 pushes the piston 58 through the air pressure to squeeze the water in the water hole 52 into between the baffle a54 and the baffle b55 to further seal the air cavity 11. The push plate 33 presses the gas in the air cavity 11 into the air storage cylinder 43 for detection through the harmful gas sensor 44. The linkage effect and synchronization between the components are good, and the gas in the air cavity 11 can be sealed in time and pressed into the air storage cylinder 43 through the push plate 33 for detection, thereby ensuring the accuracy of the detection result and solving the problem that the monitoring device in the prior art cannot achieve an effective sealing effect, resulting in easy errors in the detection result.

[0036] like Figure 3 and Figure 6As shown, the pushing assembly 3 also includes a sleeve 34 slidably arranged in the through hole 32 and a touch switch a35 fixedly arranged on the top of the air cavity 11. A spring a36 is sleeved on the sleeve 34, and the other end of the spring a36 is fixedly connected to the bottom of the air cavity 11. In the process of the cylinder 31 driving the push plate 33 to descend and press the gas in the air cavity 11 into the air storage cylinder 43 below, the push plate 33 is disconnected from the touch switch a35 when descending, and the touch switch a35 sends a signal to the controller 2. The controller 2 sends a signal to control the micro motor 53 to start and drive the baffle a54 and the baffle b55 to close the air inlet 56 to seal the air cavity 11. At the same time, during the descent process, the push plate 33 pushes the piston 58 through the air pressure to squeeze the water in the water hole 52 into between the baffle a54 and the baffle b55 to further seal the air cavity 11. The linkage effect and synchronization between the components are good, and the gas in the air cavity 11 can be sealed in time and pressed into the air storage cylinder 43 through the push plate 33 for detection, thereby ensuring the accuracy of the detection result. As the push plate 33 descends to press the gas downward, the air pressure drives the sleeve 34 slidingly arranged in the through hole 32 to slide down, and the sleeve 34 contacts the touch switch b411 on the top of the solenoid valve 410 on the top of the gas cylinder 43, so that the touch switch b411 sends a signal to the controller 2. The controller 2 sends a signal to open the solenoid valve 410 so that the gas in the air cavity 11 can enter the gas cylinder 43 and be detected by the harmful gas sensor 44; after the detection is completed, the push plate 33 is reset, and the sleeve 34 rises and resets under the action of the spring a36 to release the contact with the touch switch b411 on the top of the solenoid valve 410, and the harmful gas sensor 44 sends the detection result to the controller 2. The size of the sleeve 34 matches the through hole 32; the touch switch a35 is a prior art and will not be elaborated on here.

[0037] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the detection assembly 4 also includes a guide rail 45 fixedly arranged above the rotating disk 42, a plurality of support rods 46 are arranged at the top of the rotating disk 42 corresponding to the guide rail 45, a ball 47 slidably arranged in the guide rail 45 is fixedly arranged at the top of the support rod 46, and a threaded mounting hole 48 for mounting the gas storage cylinder 43 is opened on the circumference of the rotating disk 42. By setting the guide rail 45, the rotating disk 42 can be limited and supported, and the support rod 46 can move along the guide rail 45 when the servo motor 41 drives the rotating disk 42 to rotate, which can limit the rotating disk 42 and make the rotating disk 42 rotate more smoothly. The ball 47 arranged at the top of the support rod 46 is embedded in the guide rail 45 to support the rotating disk 42, and the rounded shape of the ball 47 can also reduce the blockage when the rotating disk 42 rotates, so that the rotating disk 42 rotates more smoothly; the threaded mounting hole 48 is provided with an internal thread, and the gas storage cylinder 43 can be installed by cooperating with the threaded mounting hole 48 and the external thread 49 arranged on the outside of the gas storage cylinder 43.

[0038] like Figure 4 , Figure 5 and Figure 6 As shown, an external thread 49 is provided on the outer side of the gas cylinder 43 corresponding to the threaded mounting hole 48, a solenoid valve 410 is provided on the top of the gas cylinder 43, and a touch switch b411 is provided on the top of the solenoid valve 410. After the detection is completed, the push plate 33 is reset, and the sleeve 34 rises and resets under the action of the spring a36 to release the contact with the touch switch b411 on the top of the solenoid valve 410. The harmful gas sensor 44 sends the detection result to the controller 2. When the harmful gas sensor 44 detects an abnormal concentration of harmful gas, the controller 2 turns on the sound and light alarm 21 to alarm, reminding the staff to evacuate the working environment, and controls the solenoid valve 410 to close, so that the gas remains in the gas cylinder 43, which is convenient for subsequent research and analysis; when the harmful gas sensor 44 does not detect harmful gas, the controller 2 first controls the solenoid valve 4 10 is closed to retain the gas in the gas cylinder 43, and then the rotating disk 42 is rotated 90° to switch the second gas cylinder 43 to the bottom of the air cavity 11. When the rotating disk 42 is rotated 180°, the controller 2 controls the solenoid valve 410 of the first gas cylinder 43 with gas retained to open, so that the internal gas is discharged from the gas cylinder 43 and then discharged from the shell 1 through the exhaust hole 14, and the subsequent processes are circulated in sequence; the gas cylinder 43 and the rotating disk 42 are threadedly connected, so that the gas cylinder 43 can be easily disassembled, assembled and replaced; the solenoid valve 410 and the touch switch b411 are prior art and will not be elaborated on here.

[0039] like Figure 8 and Figure 9 As shown, a slide groove 59 is provided on the mounting plate 51, a mounting groove 510 for mounting the micro motor 53 is provided on the top of the slide groove 59, a limiting hole 511 is provided at the bottom of the slide groove 59, a rectangular groove a512 and a rectangular groove b513 are symmetrically provided at the bottom of the slide groove 59, a gear 514 is rotatably provided in the limiting hole 511, and one end of the gear 514 is connected to the micro motor 53. The slide groove 59 is provided for the installation of the rack a515 and the rack b516, the limiting hole 511 is used for the installation and limiting of the gear 514, the rectangular groove a512 and the rectangular groove b513 respectively limit the connecting rod a517 and the connecting rod b518, so that the rack a515 and the rack b516 move more smoothly, and the micro motor 53 drives the gear 514 to rotate and then drives the rack a515 and the rack b516 to translate.

[0040] like Figure 7 , Figure 9 and Figure 10As shown in the figure, a rack a515 and a rack b516 are slidably arranged in the chute 59. Both the rack a515 and the rack b516 are engaged with the gear 514. The bottom of the rack a515 is fixedly connected to a connecting rod a517 that is slidably arranged in the rectangular groove a512, and the other end of the connecting rod a517 is fixedly connected to the baffle a54. The bottom of the rack b516 is fixedly connected to a connecting rod b518 that is slidably arranged in the rectangular groove b513, and the other end of the connecting rod b518 is fixedly connected to the baffle b55. When the cylinder 31 drives the push plate 33 to descend, the controller 2 immediately controls the micro-motor 53 to start, and drives the rack a515 and the rack b516 to move in opposite directions through the gear 514, so that the baffle a54 and the baffle b55 close the air inlet 56, achieving a preliminary sealing effect. At the same time, during the process of the push plate 33 pressing down the gas, the piston 58 in the water passage hole 52 is driven to move forward by the air pressure, and the water in the water passage hole 58 is squeezed from the water inlet 57 into the space between the baffle a54 and the baffle b55, further sealing the enclosed space formed between the baffle a54 and the baffle b55, making the sealing effect better, and avoiding the problem that the gas in the air chamber 11 overflows during the pressing process, which affects the accuracy of the detection result; the materials of the baffle a54 and the baffle b55 can be selected as waterproof materials to avoid affecting their sealing performance after long-term contact with water.

[0041] As Figure 8 and Figure 9 shown in the figure, a receiving groove a519 and a receiving groove b5110 are respectively formed in the mounting plate 51 corresponding to the baffle a54 and the baffle b55. After the rack a515 and the rack b516 drive the baffle a54 and the baffle b55 to reset, the baffle a54 and the baffle b55 are respectively received in the receiving groove a519 and the receiving groove b5110, which can avoid affecting the intake of the air inlet 56. The sizes of the baffle a54 and the baffle b55 match those of the receiving groove a519 and the receiving groove b5110; the baffle a54 and the baffle b55 are arranged in an alternating manner, which can achieve a two-layer sealing effect of one in front and one behind.

[0042] As Figure 6 shown in the figure, an auxiliary ring 5111 is fixedly arranged in the middle of the piston 58, and a spring b5112 is sleeved on the piston 58. The two ends of the spring b5112 are respectively connected to the water passage hole 52 and the auxiliary ring 5111. Through the auxiliary ring 5111, the piston 58 moves more smoothly and at the same time plays a limiting role on the piston 58 to prevent the piston 58 from shifting and affecting the extrusion of the water in the water passage hole 52; after the push plate 33 rises and resets and contacts and releases the limit on the piston 58, the piston 58 is driven to move backward and reset by the spring b5112. At the same time, the water between the baffle a54 and the baffle b55 flows back into the water passage hole 52 through the water inlet 57.

[0043] As Figure 1 and Figure 2As shown, a panel 12 is provided on the front of the housing 1, a door panel 13 is hinged on the panel 12, and an exhaust hole 14 is provided on the right side of the housing 1. The panel 12 is threaded and detachable, which is convenient for maintenance of various components in the housing 1. The door panel 13 is provided to facilitate the staff to disassemble, assemble and replace the gas cylinder 43 in the housing 1, and the gas in the housing 1 can be discharged through the exhaust hole 14.

[0044] Embodiment 2

[0045] like Figure 1 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between the second embodiment and the first embodiment is that a handle 15 is fixedly provided on the top of the housing 1. The handle 15 makes the monitoring device more portable.

[0046] The working process is as follows:

[0047] When the device is running, the controller 2 drives the cylinder 31 to rise and fall at a fixed time. When the cylinder 31 drives the push plate 33 to descend, the controller 2 immediately controls the micro motor 53 to start and drives the rack a515 and the rack b516 to move in opposite directions through the gear 514, so that the baffle a54 and the baffle b55 close the air inlet 56, and have a preliminary sealing effect on the air cavity 11. At the same time, in the process of the push plate 33 pressing the gas downward, the air pressure drives the piston 58 in the water hole 52 to move forward, and the water in the water hole 58 is squeezed from the water inlet 57 into between the baffle a54 and the baffle b55, so as to further seal the enclosed space formed between the baffle a54 and the baffle b55. In the process of the cylinder 31 driving the push plate 33 to descend and press the gas downward, the air pressure drives the sleeve 34 slidingly set in the through hole 32 to slide down, and the sleeve 34 The touch switch b411 on the top of the solenoid valve 410 on the top of the gas cylinder 43 contacts so that the touch switch b411 sends a signal to the controller 2. The controller 2 sends a signal to open the solenoid valve 410 so that the gas in the air cavity 11 can enter the gas cylinder 43 and be detected by the harmful gas sensor 44. After the detection is completed, the push plate 33 is reset, and the sleeve 34 rises and resets under the action of the spring a36 to release the contact with the touch switch b411 on the top of the solenoid valve 410. The harmful gas sensor 44 sends the detection result to the controller 2. When the harmful gas sensor 44 detects an abnormal concentration of harmful gas, the controller 2 turns on the sound and light alarm 21 to alarm, reminding the staff to evacuate the working environment, and controls the solenoid valve 410 to close, so that the gas remains in the gas cylinder 43, which is convenient for subsequent research and analysis.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the invention.

[0049] Of course, in this technical solution, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of this element can be multiple. The term "a" should not be construed as a limitation to the quantity.

[0050] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art under the technical disclosure of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A gas monitoring device for a confined space operation environment, comprising a housing (1), a controller (2) disposed within the housing (1), and an audible and visual alarm (21) disposed at the top of the housing (1), characterized in that, An air chamber (11) is provided inside the housing (1). A pushing component (3) is arranged inside the housing (1). A detection component (4) is arranged below the air chamber (11). A sealing component (5) is arranged on one side of the air chamber (11). The pushing component (3) includes a cylinder (31) fixedly arranged above the air chamber (11) and a through hole (32) opened at the bottom of the air chamber (11). The front end of the cylinder (31) is fixedly connected with a push plate (33). The detection component (4) includes a servo motor (41) fixedly arranged below the air chamber (11) and a rotating disk (42) driven by the servo motor (41). A plurality of gas storage cylinders (43) are circumferentially arranged on the rotating disk (42). A harmful gas sensor (44) is arranged inside the gas storage cylinder (43). The sealing component (5) includes a mounting plate (51) fixedly arranged on the left side of the air chamber (11) and a water through hole (52) opened inside the housing (1). A micro motor (53), a baffle a (54) and a baffle b (55) driven by the micro motor (53) are fixedly arranged inside the mounting plate (51). An air inlet (56) is opened on the mounting plate (51). A water inlet (57) communicating with the water through hole (52) is opened at the bottom of the mounting plate (51). A piston (58) is arranged inside the water through hole (52). The cylinder (31) drives the push plate (33) to push the air in the air chamber (11) into the gas storage cylinder (43), and the air is detected by the harmful gas sensor (44). During the descending process of the push plate (33), the micro motor (53) drives the baffle a (54) and the baffle b (55) to seal the air inlet (56), and at the same time, the piston (58) squeezes the water in the water through hole (52) into the space between the baffle a (54) and the baffle b (55) through the water inlet (57) for further sealing; The detection component (4) further includes a guide rail (45) fixedly arranged above the rotating disk (42). A plurality of support rods (46) corresponding to the guide rail (45) are arranged on the top of the rotating disk (42). A ball (47) slidably arranged inside the guide rail (45) is fixedly arranged at the top end of the support rod (46). Threaded mounting holes (48) for mounting the gas storage cylinders (43) are circumferentially opened on the rotating disk (42); External threads (49) are arranged on the outer side of the gas storage cylinder (43) corresponding to the threaded mounting holes (48). An electromagnetic valve (410) is arranged at the top of the gas storage cylinder (43). A touch switch b (411) is arranged at the top of the electromagnetic valve (410); An auxiliary ring (5111) is fixedly arranged in the middle of the piston (58). A spring b (5112) is sleeved on the piston (58). Two ends of the spring b (5112) are respectively connected with the water through hole (52) and the auxiliary ring (5111).

2. The gas monitoring device for a confined space operation environment according to claim 1, characterized in that, The pushing component (3) further includes a sleeve (34) slidably disposed in the through hole (32) and a touch switch a (35) fixedly disposed at the top of the air chamber (11). A spring a (36) is sleeved on the sleeve (34), and the other end of the spring a (36) is fixedly connected to the bottom of the air chamber (11).

3. The gas monitoring device for a confined space operation environment according to claim 2, wherein The mounting plate (51) is provided with a chute (59). An installation groove (510) for installing a micro motor (53) is provided at the top of the chute (59), a limiting hole (511) is provided at the bottom of the chute (59), a rectangular groove a (512) and a rectangular groove b (513) are symmetrically provided at the bottom of the chute (59), a gear (514) is rotatably disposed in the limiting hole (511), and one end of the gear (514) is connected to the micro motor (53).

4. The gas monitoring device for a confined space operation environment according to claim 3, wherein , A rack a (515) and a rack b (516) are slidably disposed in the chute (59). Both the rack a (515) and the rack b (516) are engaged with the gear (514). The bottom of the rack a (515) is fixedly connected to a connecting rod a (517) slidably disposed in the rectangular groove a (512), and the other end of the connecting rod a (517) is fixedly connected to the baffle a (54). The bottom of the rack b (516) is fixedly connected to a connecting rod b (518) slidably disposed in the rectangular groove b (513), and the other end of the connecting rod b (518) is fixedly connected to the baffle b (55).

5. The gas monitoring device for a confined space operation environment according to claim 4, characterized in that, The mounting plate (51) is respectively provided with a storage groove a (519) and a storage groove b (5110) corresponding to the baffle a (54) and the baffle b (55).

6. The gas monitoring device for a confined space operation environment according to claim 5, wherein A panel (12) is provided on the front surface of the housing (1). A door panel (13) is hinged on the panel (12). An exhaust hole (14) is provided on the right side of the housing (1). A handle (15) is fixedly provided on the top of the housing (1).

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