Limited space operation protection locking system

Abstract

The invention discloses a limited space operation protection locking system, which relates to the technical field of poisonous gas protection, and comprises a detection end shell, a gas detection module mounted in the detection end shell, a protection locking response unit for locking a door structure of an entrance and an exit of a limited space, and a controller, the gas detection module comprises a plurality of first sensors used for detecting different types of poisonous gas and is arranged in an inner cavity of the detection end shell, the detection end shell is provided with a gas inlet allowing the gas to enter, and the controller controls the protection locking response unit to lock or open the door structure according to detection values of the first sensors. According to the invention, the operation safety of workers in a limited space can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of toxic gas protection, and in particular to a confined space operation protection locking system. Background Art

[0002] Confined space operations refer to construction and work in a small, non-open space. When working in a confined space, high concentrations of toxic gases, such as methane and carbon monoxide, may accumulate in the confined space. These toxic gases are usually colorless and odorless in their natural state, and it is difficult for workers to detect their presence through their senses. By the time workers realize they are poisoned, they have already inhaled an excessive amount and are unable to save themselves.

[0003] The traditional way of working in confined spaces is to first ventilate the confined space, then test for toxic gases, and then perform operations based on the test results. The entire process takes a long time, and some workers are often unwilling to wait during this process due to their lack of awareness of safe operations, so poisoning is likely to occur. Sending special personnel to manage confined space operations will greatly increase management costs. Therefore, this application proposes a new technical solution. Summary of the Invention

[0004] In order to improve the safety of workers working in confined spaces, the present application provides a confined space operation protection locking system.

[0005] This application provides a confined space operation protection locking system, which adopts the following technical solutions: A confined space operation protection locking system, comprising: The detection end housing is used as a protection and integrated system structure; The gas detection module is installed in the detection end housing and is used to collect gas in a limited space and detect the content of several specified gas components; a controller electrically connected to the gas detection module; A guard lock response unit, which is used to lock or unlock the door structure of the entrance and exit of the confined space and is connected to the controller; The gas detection module includes multiple sets of sensors 1 for detecting different toxic gases, and the multiple sets of sensors 1 are installed in the inner cavity of the detection end housing. The detection end housing is provided with an air inlet for the multiple sets of sensors 1 to contact the gas in the limited space. The controller is electrically connected to a display unit, and the display unit is located on the door structure and is configured as follows: Add identification tags to multiple sensor groups based on user interaction data, and bind each sensor group to the type of toxic gas detected; Establish a database and record the safety thresholds of various toxic gases in the database; Obtaining detection value one of the plurality of sensor groups one, and comparing the type of toxic gas bound to the plurality of sensor groups one with a safety threshold value of the corresponding toxic gas in a database; The control display unit displays the comparison result, and controls the protection locking response unit to open the door structure when the detection value is lower than the safety threshold.

[0006] Optionally, multiple groups of second sensors are further included, wherein the multiple groups of second sensors include oxygen sensors and carbon dioxide sensors, and the multiple groups of second sensors are evenly distributed in a limited space. The controller is configured as follows: Obtain detection values 2 of multiple sets of sensors 2 within a time period of t1; According to the second detection value, a change curve of the gas to be measured located at the corresponding second sensor is obtained; The change curve of the gas to be measured is analyzed. If the change curve of the gas to be measured shows obvious fluctuations, the protective locking response unit is controlled to keep the door structure in an open state.

[0007] Optionally, the protection lock response unit includes a lock tongue for locking the door structure, a positioning rod for moving the lock tongue, and a drive assembly. The door structure has a receiving groove on the movable side of the door panel, and the receiving groove opens toward the side of the movable side of the door panel. The lock tongue is located in the receiving groove and extends from the side opening of the receiving groove. The door frame is provided with a snap-fitting groove for the end portion of the lock tongue to extend into, and the opening of the snap-fitting groove faces the movable side of the door panel; The movable side of the door panel is further provided with a through slot, the through slot being parallel to the thickness direction of the door panel and opening toward the inner side of the door panel, the through slot passing through the accommodating slot, the positioning rod being movably connected in the through slot and parallel to the through slot, an extension rod being fixed on the side wall of the positioning rod, and the extension rod being vertically arranged, and an oblique slot for the end of the extension rod to extend into being provided on the lower surface of the lock tongue; The driving assembly is located on the side of the opening of the through slot, and the driving assembly has a driving part and is used to prevent the positioning rod from extending out of the inner side of the door panel, so that the lock tongue extends out of the receiving slot under the drive of the extension rod; The positioning rod is connected to a transmission mechanism and is driven by the transmission mechanism to move the positioning rod axially. The driving assembly is electrically connected to the controller and is configured as follows: If the detection value is lower than the safety threshold, the driving portion of the driving assembly is controlled to retreat from the end of the positioning rod.

[0008] Optionally, the driving assembly includes a limiting block for limiting the positioning rod and a driving motor for driving the limiting block to release the limiting position. A sliding groove is provided on the inner side of the door panel, and the opening path of the sliding groove passes through the opening of the through groove. The limit block is slidably connected in the sliding groove and abuts against the end of the positioning rod extending out of the through groove opening, and a tooth structure is provided on the side of the limit block facing away from the door panel. The drive motor is installed at the through slot opening on the inner side of the door panel, and the output shaft of the drive motor is arranged perpendicular to the opening direction of the sliding slot. The output shaft of the drive motor is connected to a drive wheel, and the side wall of the drive wheel is provided with a tooth structure that engages with the limit block. The drive wheel and the limit block are engaged and connected, and the limit block is driven by the drive wheel to slide along the sliding slot.

[0009] Optionally, the transmission mechanism is located in the through slot and includes a fixing ring, an abutment ring and a telescopic spring, wherein the fixing ring is fixedly connected to the inner wall of the through slot and is sleeved on the positioning rod, the abutment ring is fixedly sleeved on the positioning rod, and the abutment ring is located on the side of the fixing ring facing the opening of the through slot, and the two ends of the telescopic spring are respectively pressed against the fixing ring and the abutment ring, and are used to push the end of the positioning rod toward the opening of the through slot.

[0010] Optionally, the accommodating slot and the card-engaging slot are respectively movably connected with a pushing assembly and a linkage assembly for separating the door panel from the door frame, and the pushing assembly includes a pushing rod and an abutment block, the pushing rod is arc-shaped and is rotatably connected to the inner wall of the accommodating slot about its arc center, so that one end of the pushing rod rotates and extends out of the accommodating slot, and abuts with the pushing portion of the linkage assembly, and the abutment block is fixedly connected to the side wall of the lock tongue facing the pushing rod. When the lock tongue is retracted into the accommodating slot, the abutment block abuts with the end of the pushing rod extending deep into the inner cavity of the accommodating slot, and an abutment bar for limiting the movement of the lock tongue is fixedly connected to the inner wall of the accommodating slot, and the abutment bar extends toward the opening direction of the accommodating slot and fits with the lock tongue.

[0011] Optionally, the linkage assembly includes an abutting rod for abutting and pushing the push-away rod, a pushing rod for pushing the abutting rod, and a guide block. Wherein, a guide groove is opened on the inner wall of the clamping groove along the opening direction thereof, and the guide block is fixedly connected to the end of the push rod, and the guide block is slidably connected in the guide groove, so that the push rod slides and moves in the clamping groove; The end of the abutment rod is rotatably connected to the push rod, and the abutment rod is arc-shaped and is arranged to be separated from the arc surface between the push rod and the push rod; A push spring is provided in the inner cavity of the clamping slot, and the push spring is fixedly connected to the push rod and is used to push the push rod toward the opening of the clamping slot; A limiting column is vertically fixed on the inner wall of the clamping groove, and the limiting column abuts against the abutting rod and is used to limit the rotation angle of the abutting rod so that the end of the abutting rod abuts against the push-off rod.

[0012] To sum up, the present application includes the following beneficial technical effects: multiple groups of sensors for detecting the toxic gas content in a confined space are arranged in the detection end shell, and the locking and opening states of the door structure installed at the entrance and exit of the confined space are controlled by the toxic gas content detected by sensor 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of the detection end housing of an embodiment of the present application; Figure 3 is a schematic structural diagram of a drive assembly according to an embodiment of the present application; Figure 4 is a structural schematic diagram of the transmission mechanism of an embodiment of the present application; Figure 5 It is a structural diagram of the push-away component and the linkage component of an embodiment of the present application.

[0014] Explanation of the accompanying drawings: 1. Detection end housing; 2. Gas detection module; 3. Protection locking response unit; 31. Lock tongue; 311. Accommodating groove; 312. Snap-fit groove; 313. Oblique groove; 32. Positioning rod; 321. Extension rod; 33. Drive assembly; 331. Limit block; 332. Drive motor; 333. Slide groove; 334. Drive wheel; 34. Through groove; 4. Sensor 2; 5. Transmission mechanism; 51. Fixed ring; 52. Abutment ring; 53. Telescopic spring; 6. Push-off assembly; 61. Push-off rod; 62. Abutment block; 63. Abutment bar; 7. Linkage assembly; 71. Abutment rod; 72. Push rod; 73. Guide block; 74. Guide groove; 75. Push spring; 76. Limit column. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1-5 This application is described in further detail.

[0016] The embodiment of the present application discloses a confined space operation protection locking system.

[0017] As a confined space operation protection system, this system is used to detect toxic gases in confined spaces and work in conjunction with door structures. The door structure of the confined space is locked by this system. Only when the toxic gas content detected by this system is lower than the standard threshold value that is harmful to the human body can the door structure be opened and workers can enter the confined space to operate.

[0018] Reference Figure 1 and Figure 2The confined space operation protection locking system includes a detection end shell 1, a gas detection module 2, a controller and a protection locking response unit 3, wherein the detection end shell 1 serves as the structure of the protection and integrated system, the gas detection module 2 is installed in the detection end shell 1, and the gas in the confined space is collected through the gas detection module 2 and the content of several specified gas components is detected. The protection locking response unit 3 is installed on the door structure at the entrance and exit of the confined space and is used to lock or open the door structure.

[0019] The gas detection module 2 includes multiple groups of sensors for detecting different toxic gases, and the multiple groups of sensors are fixedly installed in the inner cavity of the detection end shell 1 by bolts. The detection end shell 1 is provided with an air inlet for gas in a limited space to enter, so as to facilitate detection by the multiple groups of sensors (the multiple groups of sensors in this embodiment include but are not limited to electrochemical sensors, metal oxide semiconductor sensors, and photoionization sensors).

[0020] The gas detection module 2 and the protective lock response unit 3 are electrically connected to the controller, and the controller is electrically connected to the display unit, and the content of toxic gas detected by the gas detection module 2 is displayed through the display unit. The display unit is fixedly installed on the inner and outer sides of the door panel by bolts, so that the staff can understand the situation of toxic gas in the confined space.

[0021] Among them, the controller configuration is: Add identification tags to multiple sensor groups based on user interaction data, and bind each sensor group to the type of toxic gas detected; It is understandable that since it is necessary to detect multiple toxic gases in a confined space, multiple sensors are required. In order to facilitate operators to better monitor the conditions of each toxic gas, each sensor needs to be distinguished and numbered and bound to the corresponding type of toxic gas detected.

[0022] Establish a database and record the safety thresholds of various toxic gases in the database; Obtaining detection value one of the plurality of sensor groups one, and comparing the type of toxic gas bound to the plurality of sensor groups one with a safety threshold value of the corresponding toxic gas in a database; It is understandable that it is necessary to conduct real-time detection of toxic gases in a confined space and compare the detection results with the safety thresholds of each toxic gas established in the database to ensure whether the current toxic gas content allows workers to enter.

[0023] The control display unit displays the comparison result and controls the protection locking response unit 3 to open the door structure when the detection value is lower than the safety threshold; It can be understood that the display unit displays the result of comparing the detection value of the toxic gas with the corresponding safety threshold value, so that the staff can understand the content of the toxic gas in the current confined space; when the detection value is lower than the safety threshold value, it means that the content of each toxic gas in the current confined space is low and will not affect the human body, then the protection locking response unit 3 will release the lock on the door structure (it should be noted that the opening of the door structure by the protection locking response unit 3 refers to the unlocking of the door structure).

[0024] Through the above-mentioned setting, the gas detection module 2 is used to detect various toxic gases in the confined space, and the detection results are compared with the safety threshold, and the comparison results are displayed in the display unit, so that the staff can understand the current content of various toxic gases in the confined space when entering the confined space. During the period when the gas detection module 2 detects toxic gases, the door structure of the entrance and exit of the confined space is locked by the protective locking response unit 3 to prevent the staff from entering the confined space to perform construction work when the content of toxic gases is higher than the safety threshold, thereby improving the safety of the staff working in the confined space.

[0025] In order to facilitate the gas detection module to detect toxic gases in a limited space, a fan is installed at the air inlet at the lower end of the detection end shell 1 through bolts. The fan is used to suck gas into the detection end shell 1 for detection by the gas detection module.

[0026] It should be noted that in this embodiment, in addition to automatically locking the door when the toxic gas in the confined space exceeds the safety threshold, the first door locking can also be achieved by a specific manager at the construction site using an authorized remote control (after pairing and connection with the controller) to remotely control the protective locking response unit 3 to lock the door structure. This operation can be performed after the protective locking response unit 3 is installed on the door.

[0027] Reference Figure 1 In another embodiment of the present application, in order to prevent the staff from closing the door casually while working in the confined space, and toxic gas may be generated during the operation, causing the content of toxic gas in the confined space to gradually increase and exceed the safety threshold, causing the protective locking response unit 3 to lock the door structure, causing the staff to be trapped in the confined space, it is necessary to monitor the staff in the confined space.

[0028] Multiple groups of sensors 24 are evenly distributed in the confined space. The multiple groups of sensors 24 include oxygen sensors, carbon dioxide sensors, etc. By detecting changes in the detection values of each group of sensors 24, it is monitored whether there are staff in the confined space. The multiple groups of sensors 24 are electrically connected to a controller, and the controller is configured as follows: Obtain detection values 2 of multiple sensor groups 2 and 4 within a time period of t1; It is understandable that the t1 duration, as the interval for monitoring whether there are workers in the confined space, can be set by the operator according to the changes in the toxic gas content. When the toxic gas content in the confined space changes greatly, the t1 duration can be shortened as much as possible to ensure the safety of workers working in the confined space.

[0029] According to the detection value 2, a change curve of the gas to be measured located at the corresponding sensor 2 4 is obtained; It is understandable that the sensor 2 4 obtains real-time detection values. By collecting the detection values 2 within a time period of t1, a change curve of the gas to be measured at the current position of the sensor 2 4 within a time period of t1 can be drawn.

[0030] Analyze the change curve of the gas to be tested. If the change curve of the gas to be tested shows obvious fluctuations, control the protection lock response unit 3 to keep the door structure open. It is understandable that, taking the oxygen sensor as an example, when there are workers near the oxygen sensor, the oxygen content in the surrounding area will gradually decrease, causing the detection value of the oxygen sensor to deviate significantly (that is, the oxygen change curve drawn based on its detection value will fluctuate significantly). In this case, the protective locking response unit 3 will be kept open to the door structure to ensure that the door structure will not be locked.

[0031] Through the above settings, the changes in the detection values 2 of the multiple groups of sensors 2 4 within the time period t1 are used to determine whether there are workers in the current confined space. When the detection results show that there are workers carrying out construction and the toxic gas content in the confined space exceeds the threshold, the protective locking response unit 3 is still ensured to be in the open state of the door structure to prevent the workers from being locked in the confined space, thereby improving the safety of the system.

[0032] Reference Figure 3 、 Figure 4 as well as Figure 5 The protective locking response unit 3 includes a lock tongue 31 for locking the door structure, a positioning rod 32 for moving the lock tongue 31, and a driving assembly 33, wherein a receiving groove 311 is opened on the movable side of the door panel of the door structure, and the opening of the receiving groove 311 is facing the side opening of the movable side of the door panel, the lock tongue 31 is movably connected in the receiving groove 311, and the end of the lock tongue 31 extends from the side opening of the receiving groove 311.

[0033] A snap-fitting groove 312 is formed on the movable side of the door frame facing the door panel. The end of the lock tongue 31 extends into the snap-fitting groove 312 and is limited by the snap-fitting groove 312 to lock the door structure.

[0034] A through slot 34 is also provided on the movable side of the door panel. The opening direction of the through slot 34 is parallel to the thickness direction of the door panel, and the opening of the through slot 34 faces the inner side of the door panel. The through slot 34 and the accommodating slot 311 are interconnected. The positioning rod 32 is slidably connected in the through slot 34 along the opening direction of the through slot 34. The driving component 33 is arranged on the side of the opening of the through slot 34, and the driving part of the driving component 33 can prevent the positioning rod 32 from extending out of the inner side of the door panel.

[0035] Reference Figure 4 A transmission mechanism 5 is provided on the positioning rod 32, and the transmission mechanism 5 enables the positioning rod 32 to move axially along the through groove 34 in the through groove 34, and an extension rod 321 is fixedly connected to the side wall of the positioning rod 32 by bolts, and the extension rod 321 is vertically arranged, and an oblique groove 313 is provided on the lower surface of the lock tongue 31 for the end of the extension rod 321 to extend into.

[0036] The oblique slot 313 is opened at an angle. When the driving part of the driving assembly 33 pushes the positioning rod 32 into the through slot 34, the extension rod 321 extends into the through slot 34 along with the positioning rod 32. Under the limitation of the oblique slot 313, the extension rod 321 drives the lock tongue 31 to move toward the opening of the accommodating slot 311; when the driving part of the driving assembly 33 is moved away from the opening of the through slot 34 to release the limitation of the positioning rod 32, the positioning rod 32 is pushed axially toward the opening of the through slot 34 through the transmission mechanism 5. Under the limitation of the oblique slot 313, the extension rod 321 drives the lock tongue 31 to extend deep into the inner cavity of the accommodating slot 311, thereby driving the movement of the lock tongue 31 through the movement of the positioning rod 32 to achieve locking / unlocking of the door structure.

[0037] The drive assembly 33 is electrically connected to the controller, and the controller is configured as follows: If the detection value is lower than the safety threshold, the driving portion of the control driving assembly 33 is retreated from the end of the positioning rod 32; It can be understood that, through the limitation of the driving part of the driving assembly 33, the positioning rod 32 is extended into the through groove 34, so that under the cooperation of the extension rod 321 and the oblique groove 313, the lock tongue 31 is extended into the clamping groove 312 to achieve the locking effect of the door structure. When the detection value is lower than the safety threshold, the staff is allowed to enter the limited space for construction, and the door structure needs to be unlocked. After the driving part of the driving assembly 33 is moved away from the end of the positioning rod 32, the end of the positioning rod 32 is controlled by the transmission mechanism 5 to extend out of the through groove 34 opening, and the extension rod 321 is driven to drive the lock tongue 31 to extend into the inner cavity of the accommodating groove 311 to release the locking effect of the door structure.

[0038] Through the above-mentioned setting, under the limit of the driving part of the driving assembly 33, the lock tongue 31 extends out of the accommodating groove 311, which has a locking effect to prevent workers from entering the confined space for construction when the toxic gas content is higher than the safety threshold, thereby improving the safety of workers when working in the confined space.

[0039] Reference Figure 3 In one embodiment of the present application, in order to facilitate the control of the lock tongue 31 through the positioning rod 32, the driving assembly 33 includes a limit block 331 for blocking the positioning rod 32 and a driving motor 332 for driving the limit block 331 to contact the limit.

[0040] Among them, a sliding groove 333 is opened on the inner side of the door panel, and the opening path of the sliding groove 333 passes through the opening of the through groove 34. The limit block 331 is slidably connected in the sliding groove 333, so that the limit block 331 can abut against the positioning rod 32 during the sliding process, and prevent the end of the positioning rod 32 from extending out of the limit block 331. The side of the limit block 331 facing away from the door panel is provided with a tooth structure for cooperating with the drive motor 332.

[0041] The drive motor 332 is fixedly installed at the opening of the through slot 34 on the inner side of the door panel by bolts, and the output shaft of the drive motor 332 is perpendicular to the opening direction of the sliding slot 333. The output shaft of the drive motor 332 is coaxially fixedly connected to the drive wheel 334 through a coupling, and a tooth structure that meshes with the limit block 331 is provided on the side wall of the drive wheel 334. Through the meshing connection of the tooth structure between the drive wheel 334 and the limit block 331, when the drive wheel 334 rotates driven by the output shaft of the drive motor 332, the limit block 331 can slide along the opening direction of the sliding slot 333 through the gear connection, thereby playing the role of limiting the positioning rod 32.

[0042] Reference Figure 4 In order to facilitate the resetting of the positioning rod 32 after the blocking of the limit block 331 is released, so that the lock tongue 31 can extend into the accommodating groove 311 and release the locking effect on the door structure, the transmission mechanism 5 is located in the through groove 34, and the transmission mechanism 5 includes a fixing ring 51, an abutting ring 52 and a telescopic spring 53, wherein the fixing ring 51 is fixedly connected to the inner wall of the through groove 34 by bolts, and the fixing ring 51 is sleeved on the positioning rod 32, and the abutting ring 52 is fixedly sleeved on the positioning rod 32, and the abutting ring 52 is located on the side of the fixing ring 51 facing the opening of the through groove 34.

[0043] The two ends of the telescopic spring 53 are respectively in contact with the fixing ring 51 and the abutting ring 52. When the limit block 331 blocks the positioning rod 32, the positioning rod 32 extends into the through groove 34. Since the fixing ring 51 is fixed on the inner wall of the through groove 34, the telescopic spring 53 gradually contracts under the drive of the abutting ring 52. When the output shaft of the driving motor 332 is controlled to rotate to release the blocking of the positioning rod 32 by the limit block 331, the telescopic spring 53 gradually extends and drives the positioning rod 32 to slide toward the opening direction of the through groove 34. Driven by the extension rod 321, the oblique groove 313 brings the lock tongue 31 into the accommodating groove 311 to release the lock of the door structure.

[0044] Reference Figure 4 and Figure 5 In another embodiment of the present application, in order to release the lock on the door structure while driving the door panel to achieve the effect of automatic opening (it should be noted that the automatic opening of the door panel means that a gap is left between the door panel and the door frame to facilitate the circulation of gas in the limited space with the outside air, and it is also convenient for staff to observe whether they can enter for construction), a push-off component 6 and a linkage component 7 are respectively movably connected in the accommodating groove 311 and the clamping groove 312, and the effect of separating the door panel from the door frame is achieved through the cooperation between the push-off component 6 and the linkage component 7.

[0045] The push-off assembly 6 includes a push-off rod 61 and an abutment block 62. The push-off rod 61 is arranged in an arc shape and the concave side of the arc faces the inner side of the limited space (i.e., indoors), and the push-off rod 61 is rotatably connected to the inner wall of the accommodating groove 311, and the rotation connection of the push-off rod 61 is located at the center of its arc, so that when the push-off rod 61 rotates, one end of the push-off rod 61 can extend out of the accommodating groove 311 and abut against the pushing part of the linkage assembly 7, thereby achieving the effect of separating the door panel.

[0046] The abutment block 62 is fixedly connected to the side wall of the lock tongue 31 facing the push-off rod 61 by bolts, and when the lock tongue 31 is retracted into the accommodating groove 311, the abutment block 62 is driven to abut against the end of the push-off rod 61 extending deep into the inner cavity of the accommodating groove 311, and the push-off rod 61 is driven to rotate.

[0047] In order to prevent the positioning rod 32 from sliding along the axial direction of the through groove 34 in the through groove 34 and causing the lock tongue 31 to slide along the thickness direction of the door panel, an abutment strip 63 is fixedly connected to the inner wall of the accommodating groove 311 by bolts. The abutment strip 63 extends toward the opening direction of the accommodating groove 311 and fits with the lock tongue 31, so that the lock tongue 31 can move along the opening direction of the accommodating groove 311 when the positioning rod 32 moves under the limitation of the abutment strip 63.

[0048] Through the above arrangement, when the limit block 331 releases the obstruction of the positioning rod 32, the positioning rod 32 slides toward the opening of the through slot 34 under the drive of the telescopic spring 53, and the lock tongue 31 extends into the accommodating groove 311. The abutment block 62 abuts against the push-off rod 61 as the lock tongue 31 extends into the deep inner cavity of the accommodating groove 311 and drives one end of the push-off rod 61 to rotate toward the direction close to the linkage assembly 7, so that one end of the push-off rod 61 extends into the accommodating groove 311 and abuts against the pushing part of the linkage assembly 7. At the same time, the linkage assembly 7 is linked with the lock tongue 31 to apply a thrust to the push-off rod 61, thereby achieving the effect of separating the door panel from the door frame.

[0049] Reference Figure 5 In one embodiment of the present application, in order to cooperate with the pushing rod 61 so that the pushing rod 61 drives the door panel to separate from the door frame, the linkage assembly 7 includes an abutting rod 71 for abutting and pushing the pushing rod 61, a pushing rod 72 for pushing the abutting rod 71, and a guide block 73.

[0050] Among them, a guide groove 74 is opened on the inner wall of the clamping groove 312 along the opening direction of the clamping groove 312, and the guide block 73 is slidably connected in the guide groove 74. The end of the push rod 72 is fixedly connected to the guide block 73 by a bolt, so that the push rod 72 slides in the clamping groove 312 along with the guide block 73.

[0051] The push rod 72 is fixedly sleeved with a connecting block, the abutting rod 71 is arc-shaped with its arc-shaped concave side facing the outside of the limited space, and one end of the abutting rod 71 is rotatably connected to the connecting block. In order to make the push rod 72 move in conjunction with the movement of the lock tongue 31, a push spring 75 is fixed at the bottom of the inner cavity of the clamping groove 312, and the push spring 75 extends toward the opening of the clamping groove 312. A limiting rod is welded on the side wall of the push rod 72, and the push spring 75 is sleeved on the limiting rod and abuts against the push rod 72.

[0052] The limit column 76 is vertically fixed on the inner wall of the clamping groove 312 by a bolt, and the arc surface between the abutting rod 71 and the pushing rod 61 is set to face each other. At the same time, the abutting rod 71 is arranged on the side of the pushing rod 61 facing the inner side of the limited space, and the limit column 76 abuts against the side of the abutting rod 71 and the pushing rod 61, and the limit column 76 is arranged on the side of the arc center of the abutting rod 71 that is biased toward the pushing rod 61. At the same time, a torsion spring is installed at the rotating connection of the connecting block of the abutting rod 71 and the pushing rod 72. By setting the torsion spring, a force is applied to the abutting rod 71 to always keep the abutting rod 71 pressed against the limit column 76.

[0053] As a result, the abutting rod 71 is pushed by the pushing rod 72 through the limiting column 76 and moves toward the opening of the clamping groove 312, so that the abutting rod 71 can approach and rotate toward the direction of the pushing rod 61, so that the end of the abutting rod 71 can abut against the pushing rod 61 when rotating, applying a pushing force to the pushing rod 61, thereby causing the pushing rod 61 to drive the door panel to separate from the door frame. It should be noted that in this embodiment, the door panel opens by rotating toward the outside of the limited space.

[0054] At the same time, the limiting post 76 abuts against the locking tongue 31 extending into the engaging groove 312 to ensure the locking effect of the door panel and prevent the door panel from being pushed after being locked.

[0055] When the locking bolt 31 is pushed into the locking groove 312 by the limiting post 76, the limiting effect of the abutment block 62 on the push-off rod 61 is released, so that the push-off rod 61 can be rotated and retracted into the receiving groove 311. At the same time, the locking bolt 31 pushes the push rod 72, so that the push rod 72 drives the abutment rod 71 to extend into the locking groove 312, thereby locking the door panel. When the output shaft of the driving motor 332 is reversed, so that the limit block 331 releases the obstruction of the positioning rod 32, the locking tongue 31 extends back to the accommodating groove 311, and under the elastic effect of the push spring 75, the push rod 72 drives the abutting rod 71 toward the opening of the clamping groove 312. The abutting rod 71 is limited by the limiting column 76 to adjust the rotation position of the end of the abutting rod 71, so that the abutting rod 71 can position the rotation angle of the abutting rod 71 during the abutment with the pushing rod 61, so as to facilitate the abutment of the abutting rod 71 with the pushing rod 61.

[0056] The working principle of this embodiment is as follows: by rotating the output shaft of the driving motor 332, the driving wheel 334 drives the limiting block 331 to slide along the direction of the sliding groove 333 and limit the positioning rod 32; After being limited by the limiting block 331 , the positioning rod 32 drives the extension rod 321 to extend into the through slot 34 . The extension rod 321 drives the lock tongue 31 from the receiving slot 311 to extend into the engaging slot 312 under the limitation of the oblique slot 313 to complete the locking of the door structure.

[0057] When the detection value of the multiple groups of sensors used to detect the content of toxic gases is lower than the safety threshold, the output shaft of the drive motor 332 is controlled to reverse, so that the limit block 331 releases the limit on the positioning rod 32, and the positioning rod 32 drives the extension rod 321 to move toward the inside of the door panel, so that the lock tongue 31 is retracted into the receiving groove 311 to release the lock on the door structure. Only then can the staff enter the limited space to work, thereby improving the safety of the staff's work.

[0058] When the lock tongue 31 moves toward the deep inner cavity of the accommodating groove 311, the abutment block 62 abuts against one end of the push-off rod 61 located deep in the inner cavity of the accommodating groove 311 and drives the other end of the push-off rod 61 to rotate toward the inner side of the door panel; when the lock tongue 31 moves out of the engaging groove 312, the pushing spring 75 stretches and drives the pushing rod 72 to move toward the opening of the engaging groove 312, and the abutment rod 71 moves with the pushing rod 72 and rotates toward the outer side of the door panel under the limit of the limiting column 76, so that it abuts against the pushing rod 61 and drives the door panel to open, thereby realizing the automatic door opening and ventilation effect.

[0059] When the detection value of sensor 2 4 shows that there are workers working in the limited space, the protective locking response unit 3 always keeps the door structure open to prevent the door structure from being locked after the toxic gas content rises, ensuring that the workers can leave at any time during the operation.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A confined space operation protection locking system, characterized in that: include: A detection end housing (1) serving as a protection and integrated system structure; A gas detection module (2) is installed on the detection end housing (1) and is used to collect gas in a limited space and detect the content of several specified gas components; A controller electrically connected to the gas detection module (2); A protection lock response unit (3) is used to lock or unlock a door structure of an entrance or exit of a confined space and is connected to a controller; The gas detection module (2) includes a plurality of sensor groups for detecting different toxic gases, and the plurality of sensor groups are installed in the inner cavity of the detection end housing (1). The detection end housing (1) is provided with an air inlet for the plurality of sensor groups to contact the gas in the limited space. The controller is electrically connected to a display unit, and the display unit is located on the door structure and is configured as follows: Add identification tags to multiple sensor groups based on user interaction data, and bind each sensor group to the type of toxic gas detected; Establish a database and record the safety thresholds of various toxic gases in the database; Obtaining detection value one of the plurality of sensor groups one, and comparing the type of toxic gas bound to the plurality of sensor groups one with a safety threshold value of the corresponding toxic gas in a database; The control display unit displays the comparison result, and controls the protection locking response unit (3) to open the door structure when the detection value is lower than the safety threshold.

2. The confined space operation protection locking system according to claim 1, characterized in that: It also includes multiple sets of sensors (4), the multiple sets of sensors (4) include oxygen sensors and carbon dioxide sensors, the multiple sets of sensors (4) are evenly distributed in a limited space, and the controller is configured as follows: Obtain detection values 2 of multiple sensor groups 2 (4) within a time period of t1; According to the detection value 2, a change curve of the gas to be measured at the corresponding sensor 2 (4) is obtained; The change curve of the gas to be measured is analyzed. If the change curve of the gas to be measured shows obvious fluctuations, the protective locking response unit (3) is controlled to keep the door structure in an open state.

3. The confined space operation protection locking system according to claim 1, characterized in that: The protective locking response unit (3) comprises a lock tongue (31) for locking the door structure, a positioning rod (32) for moving the lock tongue (31), and a driving assembly (33). The movable side of the door panel of the door structure is provided with a receiving groove (311), and the receiving groove (311) opens toward the side of the movable side of the door panel, and the lock tongue (31) is located in the receiving groove (311) and extends from the side opening of the receiving groove (311); The door frame is provided with a clamping groove (312) for the end of the lock tongue (31) to extend into, and the opening of the clamping groove (312) faces the movable side of the door panel; A through slot (34) is further provided on the movable side of the door panel. The through slot (34) is parallel to the thickness direction of the door panel and opens toward the inner side of the door panel. The through slot (34) passes through the accommodating slot (311). The positioning rod (32) is movably connected to the through slot (34) and is parallel to the through slot (34). An extension rod (321) is fixed to the side wall of the positioning rod (32), and the extension rod (321) is vertically arranged. An oblique slot (313) is provided on the lower surface of the lock tongue (31) for the end of the extension rod (321) to extend into. The driving assembly (33) is located on the side of the opening of the through slot (34), and the driving assembly (33) has a driving portion and is used to prevent the positioning rod (32) from extending out of the inner side of the door panel, so that the lock tongue (31) extends out of the receiving slot (311) under the drive of the extension rod (321); The positioning rod (32) is connected to a transmission mechanism (5) and the positioning rod (32) is driven by the transmission mechanism (5) to move axially. The driving assembly (33) is electrically connected to a controller and is configured as follows: If the detection value is lower than the safety threshold, the driving portion of the driving assembly (33) is controlled to retreat from the end of the positioning rod (32).

4. The confined space operation protection locking system according to claim 3, characterized in that: The driving assembly (33) comprises a limiting block (331) for limiting the positioning rod (32) and a driving motor (332) for driving the limiting block (331) to release the limiting position. A sliding groove (333) is provided on the inner side of the door panel, and the opening path of the sliding groove (333) passes through the opening of the through groove (34); the limit block (331) is slidably connected in the sliding groove (333) and abuts against an end of the positioning rod (32) extending out of the opening of the through groove (34); and a tooth structure is provided on the side of the limit block (331) facing away from the door panel; The drive motor (332) is installed at the opening of the through slot (34) on the inner side of the door panel, and the output shaft of the drive motor (332) is arranged perpendicular to the opening direction of the sliding slot (333). The output shaft of the drive motor (332) is connected to a drive wheel (334), and a tooth structure meshing with the limit block (331) is provided on the side wall of the drive wheel (334). The drive wheel (334) is meshingly connected with the limit block (331), and the limit block (331) is driven by the drive wheel (334) to slide along the sliding slot (333).

5. The confined space operation protection locking system according to claim 3, characterized in that: The transmission mechanism (5) is located in the through slot (34) and comprises a fixed ring (51), an abutting ring (52) and a telescopic spring (53), wherein the fixed ring (51) is fixedly connected to the inner wall of the through slot (34) and the fixed ring (51) is sleeved on the positioning rod (32), the abutting ring (52) is fixedly sleeved on the positioning rod (32), and the abutting ring (52) is located on the side of the fixed ring (51) facing the opening of the through slot (34), and the two ends of the telescopic spring (53) are respectively pressed against the fixed ring (51) and the abutting ring (52) and are used to push the end of the positioning rod (32) toward the opening of the through slot (34).

6. The confined space operation protection locking system according to claim 3, characterized in that: A push-off assembly (6) and a linkage assembly (7) for separating the door panel from the door frame are movably connected in the receiving groove (311) and the clamping groove (312), respectively. The push-off assembly (6) comprises a push-off rod (61) and an abutment block (62). The push-off rod (61) is arc-shaped and is connected to the inner wall of the receiving groove (311) by rotating at its arc center, so that one end of the push-off rod (61) rotates and extends out of the receiving groove (311) and abuts against the pushing portion of the linkage assembly (7). The block (62) is fixedly connected to the side wall of the lock tongue (31) facing the push-off rod (61). When the lock tongue (31) is retracted into the receiving groove (311), the abutment block (62) abuts against the end of the push-off rod (61) extending deep into the inner cavity of the receiving groove (311). An abutment strip (63) for limiting the movement of the lock tongue (31) is fixedly connected to the inner wall of the receiving groove (311). The abutment strip (63) extends toward the opening direction of the receiving groove (311) and fits with the lock tongue (31).

7. The confined space operation protection locking system according to claim 6, characterized in that: The linkage assembly (7) comprises an abutting rod (71) for abutting and pushing the push-off rod (61), a pushing rod (72) for pushing the abutting rod (71), and a guide block (73). A guide groove (74) is provided on the inner wall of the clamping groove (312) along its opening direction, and the guide block (73) is fixedly connected to the end of the push rod (72), and the guide block (73) is slidably connected in the guide groove (74), so that the push rod (72) slides and moves in the clamping groove (312); The end of the abutting rod (71) is rotatably connected to the pushing rod (72), and the abutting rod (71) is arc-shaped and is arranged with its arc surface facing away from the pushing rod (61); A push spring (75) is provided in the inner cavity of the clamping groove (312), and the push spring (75) is fixedly connected to the push rod (72) and is used to push the push rod (72) toward the opening of the clamping groove (312); A limiting column (76) is vertically fixed on the inner wall of the clamping groove (312), and the limiting column (76) abuts against the abutting rod (71) and is used to limit the rotation angle of the abutting rod (71), so that the end of the abutting rod (71) abuts against the push-off rod (61).

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