Limited space working environment gas monitoring device

Abstract

The invention relates to the technical field of toxic gas monitoring, in particular to a limited space operation environment gas monitoring device which comprises a shell, a controller and an audible and visual alarm, a gas cavity is formed in the shell, a pushing assembly, a detection assembly and a sealing assembly are arranged in the shell, and the pushing assembly comprises an air cylinder, a through hole and a pushing plate; the detection assembly comprises a servo motor and a rotating disc, a plurality of air storage cylinders are arranged on the circumference of the rotating disc, harmful gas sensors are arranged in the air storage cylinders, the sealing assembly comprises a mounting plate and a water through hole, a micro motor, a baffle a and a baffle b are arranged in the mounting plate, an air inlet and a water inlet are formed in the mounting plate, and a piston is arranged in the water through hole. The air cylinder drives the push plate to push air in the air cavity into the air storage cylinder to be detected through 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 meanwhile, the piston squeezes water in the water through hole into the position between the baffle a and the baffle b to be further sealed, so that the detection result is more accurate.

Description

Technical Field

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

[0002] Harmful gases in confined space working environments are an important safety issue that requires strict management. Confined spaces usually refer to closed or partially closed spaces. These spaces have poor natural ventilation, which can easily lead to the accumulation of toxic and harmful gases, flammable and explosive substances, or insufficient oxygen content, which can easily pose a hidden danger to the safety of operators. This is especially important in the biochemistry, biomedicine, chemical and other industries. When experimenters conduct experiments in confined spaces such as biochemical laboratories, a variety of harmful gases may be produced in the confined space, such as formaldehyde, chlorine, ammonia, carbon monoxide, etc. These gases pose a serious threat to human health. Long-term exposure may cause poisoning, cancer or other health problems. Therefore, it is necessary to monitor the gas through a monitoring device and detect harmful gases in time and alarm to prevent damage to personnel health. The monitoring devices of the prior art usually lack an effective sealing function. After entering the monitoring device, the gas cannot be effectively sealed in the monitoring device, resulting in inaccurate detection results, affecting the timely alarm of the monitoring device. In addition, the monitoring devices of the prior art cannot effectively store harmful gases, which is not conducive to the later research and analysis of harmful gases generated by the experiment.

[0003] A Chinese invention patent with announcement number CN117630293A discloses a toxic gas monitoring and collection device for confined space operations, including a shell, and also includes: a timed sampling component installed inside the shell and connected to the outside of the space, for regularly sampling the air in the space; a first detection box and a second detection box, for providing a separate detection space for the sampled gas; a toxic gas sensor installed inside the first detection box, for detecting toxic gases in the sampled gas; an oxygen detector installed inside the second detection box; this device stores the test gas while monitoring the gas through the arrangement of the timed sampling component and the equal-division push component, which is beneficial for retaining the gas sample at the same time when a gas abnormality is detected, thereby facilitating 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 by equally pushing the components, the method of relying solely on the partition plate for separation and sealing may still have gaps, causing gas to overflow, thereby affecting the accuracy of the detection results. Summary of the invention

[0005] The purpose of the present invention is to provide a gas monitoring device for a limited space working environment in view of the deficiencies of the prior art, comprising a shell, a controller arranged in the shell and an audible and visual alarm arranged on the top of the shell, an air cavity is opened inside the shell, a pushing assembly is arranged in the shell, a detection assembly is arranged below the air cavity, a sealing assembly is arranged on one side of the air cavity, the pushing assembly comprises a cylinder fixedly arranged above the air cavity and a through hole opened at the bottom of the air cavity, a push plate is fixedly connected to the front end of the cylinder, the detection assembly comprises a servo motor fixedly arranged below the air cavity and a rotating disk driven by the servo motor, a plurality of air storage cylinders are arranged on the circumference of the rotating disk, a harmful gas sensor is arranged in the air storage cylinder, the sealing assembly comprises a mounting plate fixedly arranged on the left side of the air cavity and a water through hole opened in the shell, a micro motor and baffles a and baffles b driven by the micro motor are fixedly arranged in the mounting plate, an air inlet is opened on the mounting plate, a water inlet connected to the water through hole is opened at the bottom of the mounting plate, and a piston is arranged in the water through hole, so as to solve the problem that the existing technology has a poor sealing effect and is easy to affect the accuracy of the detection result.

[0006] The technical solutions of the present invention are as follows: A gas monitoring device for a limited space working environment comprises a shell, a controller arranged in the shell, and an audible and visual alarm arranged on the top of the shell, an air cavity is opened inside the shell, a pushing assembly is arranged in the shell, a detection assembly is arranged below the air cavity, a sealing assembly is arranged on one side of the air cavity, the pushing assembly comprises a cylinder fixedly arranged above the air cavity and a through hole arranged at the bottom of the air cavity, a push plate is fixedly connected to the front end of the cylinder, the detection assembly comprises a servo motor fixedly arranged below the air cavity and a rotating disk driven by the servo motor, a plurality of gas storage cylinders are arranged on the circumference of the rotating disk, and harmful gas is arranged in the gas storage cylinders The sensor, the sealing component includes a mounting plate fixedly arranged on the left side of the air cavity and a water hole opened in the shell, a micro motor and baffle a and baffle b driven by the micro motor are fixedly arranged in the mounting plate, an air inlet is opened on the mounting plate, a water inlet connected to the water hole is opened at the bottom of the mounting plate, a piston is arranged in the water hole, the cylinder drives the push plate to push the air in the air cavity into the air storage cylinder to detect the air through the harmful gas sensor, and during the descent of the push plate, the micro motor drives the baffle a and baffle b to seal the air inlet, and the piston squeezes the water in the water hole through the water inlet into the space between the baffle a and the baffle b for further sealing.

[0007] Preferably, the pushing assembly further comprises a sleeve slidably disposed in the through hole and a touch switch a fixedly disposed on the top of the air cavity, wherein 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 cavity.

[0008] Preferably, the detection assembly also includes a guide rail fixedly arranged above the rotating disk, a plurality of support rods are arranged on the top of the rotating disk corresponding to the guide rail, a ball slidably arranged in the guide rail is fixedly arranged on the top of the support rod, and a threaded mounting hole for installing the air cylinder is opened on the circumference of the rotating disk.

[0009] As a preference, an external thread is provided on the outer side of the gas cylinder corresponding to the threaded mounting hole, a solenoid valve is provided on the top of the gas cylinder, and a touch switch b is provided on the top of the solenoid valve.

[0010] As a preferred embodiment, a slide groove is provided on the mounting plate, a mounting groove for installing a micro motor is provided on the top of the slide groove, a limiting hole is provided at the bottom of the slide groove, a rectangular groove a and a rectangular groove b are symmetrically provided at the bottom of the slide groove, a gear is rotatably arranged in the limiting hole, and one end of the gear is connected to the micro motor.

[0011] As a preferred embodiment, a rack a and a rack b are slidably arranged in the slide groove, and the rack a and the rack b are both meshed with the gear. The bottom of the rack a is fixedly connected to a connecting rod a slidably arranged in the rectangular groove a, and the other end of the connecting rod a is fixedly connected to the baffle a. The bottom of the rack b is fixedly connected to a connecting rod b slidably arranged in the rectangular groove b, and the other end of the connecting rod b is fixedly connected to the baffle b.

[0012] As a preference, a receiving groove a and a receiving groove b are respectively provided in the mounting plate corresponding to the baffle a and the baffle b.

[0013] As a preference, an auxiliary ring is fixedly provided in the middle of the piston, a spring b is sleeved on the piston, and two ends of the spring b are respectively connected to the water hole and the auxiliary ring.

[0014] As another preferred embodiment, a panel is provided on the front side of the shell, a door panel is hinged on the panel, an exhaust hole is opened on the right side of the shell, and a handle is fixedly provided on the top of the shell.

[0015] The beneficial effects of the present invention are as follows: The present invention is provided with a pushing component. In the process that the cylinder in the pushing component drives the pushing plate to descend to press the gas in the air cavity into the air storage cylinder below, the pushing plate is disconnected from the touch switch a when descending, and 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 cavity. At the same time, during the descent process, the push plate pushes the piston through the air pressure to squeeze the water in the water hole into between the baffle a and the baffle b to further seal the air cavity. The linkage effect and synchronization between the components are good, and the gas in the air cavity can be sealed in time and pressed into the air storage cylinder through the push plate for detection, thereby ensuring the accuracy of the detection result.

[0016] The present invention is provided with a sealing component. When the cylinder drives the push plate to descend, the controller immediately controls the micromotor 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, thereby achieving a preliminary sealing effect. At the same time, in the process of the push plate pressing the gas downward, the piston in the water hole is driven by the air pressure to move forward, and the water in the water hole is squeezed from the water inlet into between the baffle a and the baffle b, thereby achieving a further sealing effect on the enclosed space formed between the baffle a and the baffle b, so that the sealing effect is better, and the problem of gas in the air cavity overflowing during the downward pressure process, which affects the accuracy of the detection result, can be avoided.

[0017] The present invention is provided with a detection component. The servo motor in the detection component can regularly drive a rotating disk equipped with several gas cylinders to rotate in a circle under the action of a controller. When the cylinder drives the push plate to descend to press the gas downward, the air pressure drives the sleeve slidingly arranged in the through hole to slide down. The sleeve contacts the touch switch b at the top of the electromagnetic valve at the top of the gas cylinder, so that the touch switch b sends a signal to the controller. The controller sends a signal to open the electromagnetic valve so that the gas in the air cavity can enter the gas cylinder for detection by the harmful gas sensor. After the detection is completed, the push plate is reset, and the servo motor drives the rotating disk to rotate 90° so that the next gas cylinder is switched to the bottom of the air cavity to wait for the next round of detection. By arranging multiple gas cylinders, not only can the detection gas be retained for subsequent research and analysis, but also continuous sampling can be satisfied. When the space needs to be detected again or continuously detected, continuous sampling can be performed to avoid errors in the detection results.

[0018] In summary, the present invention has the advantages of better sealing effect, guaranteed accuracy of detection results, good linkage of various components, good synchronization effect, ingenious structure, etc., and is suitable for the field of toxic gas monitoring technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of the gas monitoring device for the confined space working environment; Figure 2 It is a side structural diagram of a gas monitoring device for a confined space working environment; Figure 3 It is a schematic diagram of the position structure of the detection component; Figure 4 It is a schematic diagram of the position structure of the sealing component; Figure 5 It is a schematic diagram of the structure of the detection component; Figure 6 It is a schematic diagram of a state in which the pushing component presses gas into the detection component in a state in which the sealing component seals the air cavity; Figure 7 for Figure 6A magnified schematic diagram of point A; Figure 8 is a schematic diagram of the cross-sectional structure of the mounting plate; Fig. 9 It is a schematic diagram of the state when the micro motor drives the rack a and the rack b to move in the opposite direction and reset through the gear; Fig.10 It is a schematic diagram of the state when baffle a and baffle b do not seal the air cavity.

[0020] In the figure: housing 1, controller 2, push assembly 3, detection assembly 4, sealing assembly 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 a35, spring a36, 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 b411, mounting plate 51, water hole 52, micro motor 53, baffle a54, baffle b55, air inlet 56, water inlet 57, piston 58, slide groove 59, mounting groove 510, limiting hole 511, rectangular groove a512, rectangular groove b513, gear 514, rack a515, rack b516, connecting rod a517, connecting rod b518, storage groove a519, storage groove b5110, auxiliary ring 5111, spring b5112. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0022] Embodiment 1

[0023] like 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figure 8 and Fig. 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.

[0028] like Figure 7 , Fig. 9 and Fig.10As shown, a rack a515 and a rack b516 are slidably arranged in the slide groove 59, and the rack a515 and the rack b516 are both meshed with the gear 514. The bottom of the rack a515 is fixedly connected to a connecting rod a517 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 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 drive 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, thereby achieving a preliminary sealing effect. At the same time, in the process of the push plate 33 pressing down the gas, 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, thereby achieving a further sealing effect on the enclosed space formed between the baffle a54 and the baffle b55, thereby achieving a better sealing effect, and being able to avoid the gas in the air cavity 11 from overflowing during the downward pressure process, thereby affecting the accuracy of the detection result; the material of the baffle a54 and the baffle b55 can be made of waterproof material to avoid affecting its sealing after long-term contact with water.

[0029] like Figure 8 and Fig. 9 As shown, the mounting plate 51 is provided with receiving grooves a519 and b5110 corresponding to the baffle a54 and b55, respectively. After the rack a515 and the rack b516 drive the baffle a54 and b55 to reset, the baffle a54 and b55 are respectively received in the receiving grooves a519 and b5110, which can avoid affecting the air intake of the air inlet 56. The sizes of the baffle a54 and b55 match the receiving grooves a519 and b5110; the baffle a54 and b55 are staggered, which can achieve the effect of two layers of sealing, one in front and one in the back.

[0030] like Figure 6 As shown, an auxiliary ring 5111 is fixedly arranged in the middle of the piston 58, and a spring b5112 is sleeved on the piston 58, and the two ends of the spring b5112 are respectively connected to the water hole 52 and the auxiliary ring 5111. The auxiliary ring 5111 makes the piston 58 move more smoothly and also acts as a limiter for the piston 58 to prevent the piston 58 from deviating and affecting the squeezing of water in the water hole 52; after the push plate 33 rises and resets, it contacts the limiter of the piston 58 and drives the piston 58 to move back and reset through the spring b5112, and at the same time, the water between the baffle a54 and the baffle b55 flows back to the water hole 52 through the water inlet 57.

[0031] like 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.

[0032] Embodiment 2

[0033] 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.

[0034] The working process is as follows: 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.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0036] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0037] The above is only a preferred specific embodiment 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 a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas monitoring device for a confined space working environment, comprising a housing (1), a controller (2) arranged in the housing (1), and an audible and visual alarm (21) arranged on the top of the housing (1), characterized in that: An air cavity (11) is provided inside the shell (1), a pushing assembly (3) is provided inside the shell (1), a detecting assembly (4) is provided below the air cavity (11), a sealing assembly (5) is provided on one side of the air cavity (11), the pushing assembly (3) comprises a cylinder (31) fixedly arranged above the air cavity (11) and a through hole (32) provided at the bottom of the air cavity (11), a pushing plate (33) is fixedly connected to the front end of the cylinder (31), the detecting assembly (4) comprises 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 provided on the circumference of the rotating disk (42), a harmful gas sensor (44) is provided in the air storage cylinder (43), the sealing assembly (5) comprises a mounting plate (51) fixedly arranged on the left side of the air cavity (11) and a through hole (32) provided on the shell (11). A water through hole (52) is provided in the body (1); a micro motor (53) and a baffle a (54) and a baffle b (55) driven by the micro motor (53) are fixedly provided in the mounting plate (51); an air inlet (56) is provided on the mounting plate (51); a water inlet (57) connected to the water through hole (52) is provided at the bottom of the mounting plate (51); a piston (58) is provided in the water through hole (52); and the cylinder (31) The push plate (33) is driven 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 descent 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), while the piston (58) squeezes the water in the water hole (52) through the water inlet (57) into the space between the baffle a (54) and the baffle b (55) to further seal the air.

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

3. A gas monitoring device for a confined space working environment according to claim 2, characterized in that: The detection assembly (4) further comprises 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 round ball (47) is fixedly arranged at the top of the support rod (46) and is slidably arranged in the guide rail (45); and a threaded mounting hole (48) for mounting the air storage cylinder (43) is provided on the circumference of the rotating disk (42).

4. A gas monitoring device for a confined space working environment according to claim 3, characterized in that: An external thread (49) is provided on the outside of the gas storage cylinder (43) corresponding to the threaded mounting hole (48), a solenoid valve (410) is provided on the top of the gas storage cylinder (43), and a touch switch b (411) is provided on the top of the solenoid valve (410).

5. A gas monitoring device for a confined space working environment according to claim 4, characterized in that: The mounting plate (51) is provided with a slide groove (59), a mounting groove (510) for mounting a micro motor (53) is provided at the top of the slide groove (59), a limiting hole (511) is provided at the bottom of the slide groove (59), a rectangular groove a (512) and a rectangular groove b (513) are symmetrically provided at the bottom of the slide groove (59), a gear (514) is rotatably arranged in the limiting hole (511), and one end of the gear (514) is connected to the micro motor (53).

6. A gas monitoring device for a confined space working environment according to claim 5, characterized in that A rack a (515) and a rack b (516) are slidably arranged in the slide groove (59), and the rack a (515) and the rack b (516) are both meshed with the gear (514). The bottom of the rack a (515) is fixedly connected to a connecting rod a (517) slidably arranged 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 arranged in the rectangular groove b (513), and the other end of the connecting rod b (518) is fixedly connected to the baffle b (55).

7. A gas monitoring device for a confined space working environment according to claim 6, characterized in that: The mounting plate (51) is provided with a receiving groove a (519) and a receiving groove b (5110) corresponding to the baffle plate a (54) and the baffle plate b (55), respectively.

8. A gas monitoring device for a confined space working environment according to claim 7, characterized in that: An auxiliary ring (5111) is fixedly arranged in the middle of the piston (58), and a spring b (5112) is sleeved on the piston (58), with two ends of the spring b (5112) being respectively connected to the water through hole (52) and the auxiliary ring (5111).

9. A gas monitoring device for a confined space working environment according to claim 8, characterized in that: The front of the shell (1) is provided with a panel (12), a door panel (13) is hingedly connected to the panel (12), an exhaust hole (14) is opened on the right side of the shell (1), and a handle (15) is fixedly provided on the top of the shell (1).

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