A safety hidden danger prevention and control device for multi-point ventilation in a landfill pit

Abstract

This utility model discloses a multi-point ventilation safety hazard prevention and control device for operations inside garbage pits, relating to the field of garbage pit control technology. It includes an installation box fixedly installed inside a ventilation duct; an impeller is installed at the lower end of the installation box, and a drive shaft in the middle of the impeller rotates through the installation box and extends into it. A follow-up triggering mechanism is fixed on the drive shaft. The follow-up triggering mechanism includes a fixed sleeve, a rotating support, a movable rod, and a trigger block. The fixed sleeve is fixed to the drive shaft, the rotating support is fixed to the side wall of the fixed sleeve, and one end of the movable rod is rotatably sleeved on the rotating support. Through the impeller, first trigger ring, second trigger ring, and follow-up triggering mechanism, this utility model allows workers to quickly determine the location of safety hazards based on alarm information from a remote monitoring terminal or alarms issued by an audible and visual alarm, enabling timely inspection and hazard removal, thereby achieving timely risk control and improving the safety of operations inside garbage pits.

Description

Technical Field

[0001] This utility model relates to the field of landfill prevention and control technology, and in particular to a multi-point ventilation safety hazard prevention and control device for operations inside landfills. Background Technology

[0002] In landfill operations, waste is typically layered and buried in a landfill pit, with ventilation ducts installed to control the air (oxygen content) inside the waste, thereby controlling the degradation of the waste within the pit; or the gases generated in the landfill pit (including usable methane, toxic and harmful sulfur dioxide, etc.) are extracted for utilization or harmless treatment.

[0003] A search revealed a method for treating municipal solid waste in patent document CN100395041C. This method includes the following steps: 1) establishing landfill units using a zoned landfill approach; 2) digging leachate collection pits at the bottom of each landfill unit; 3) covering the surfaces in contact with the waste within the landfill unit with an impermeable membrane; 4) installing a leachate collection pump and a leachate discharge pipe in the leachate collection pit; 5) filling the landfill with waste, vertically inserting several ventilation pipes into the waste pile, installing explosion-proof fans at the other end of one or more of the ventilation pipes, and constructing a perforated protective dam around the waste pile after landfilling is completed.

[0004] Based on the above search and combined with existing technology, it was found that although the establishment of existing ventilation ducts has brought many benefits, ventilation ducts may experience leakage and blockage during long-term use, causing them to lose their due function and bring certain safety hazards (such as the leakage of toxic and harmful gases causing air pollution). The existing ventilation ducts in garbage pits are generally not equipped with corresponding monitoring equipment, so they cannot prevent and control the above-mentioned safety hazards. Therefore, there is a need for a multi-point ventilation safety hazard prevention and control device for garbage pit operations. Utility Model Content

[0005] The purpose of this application is to provide a multi-point ventilation safety hazard prevention and control device for operations inside a landfill, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit, comprising an installation box fixedly installed inside a ventilation duct;

[0007] An impeller is installed at the lower end of the mounting box. The drive shaft in the middle of the impeller rotates through the mounting box and extends into the mounting box. A follow-up triggering mechanism is fixed on the drive shaft. The follow-up triggering mechanism includes a fixed sleeve, a rotating support, a movable rod, and a trigger block. The fixed sleeve is fixed on the drive shaft. The rotating support is fixed to the side wall of the fixed sleeve. One end of the movable rod is rotatably sleeved on the rotating support. The trigger block is fixed to the end of the movable rod away from the rotating support.

[0008] The mounting box also contains a first trigger ring and a second trigger ring. Both the first trigger ring and the second trigger ring are arranged around the outside of the drive shaft and are coaxial with the drive shaft. The first trigger ring is located above the second trigger ring. The upper end of the movement path of the trigger block coincides with the position of the first trigger ring, and the lower end coincides with the position of the second trigger ring.

[0009] The mounting box also contains a control and power module for collecting electrical signals generated when the trigger block contacts the first trigger ring or the second trigger ring. The control and power module also supplies power to the trigger block, the first trigger ring, and the second trigger ring.

[0010] The top of the mounting box is covered with a lid, and the control and power module is fixedly installed inside the lid. An audible and visual alarm that is electrically connected to the control and power module is fixed on the outside of the lid.

[0011] Preferably, a sensor group is also installed inside the mounting box. The sensor group includes a gas flow sensor, a harmful gas sensor, and a temperature and humidity sensor fixed to the bottom of the mounting box. The lower ends of the gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor are all formed with probes that are fixed and penetrate the mounting box. The gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor are used to detect the gas flow, the content of toxic and harmful gases, the temperature, and the humidity in the ventilation duct, respectively.

[0012] The gas flow sensor, harmful gas sensor, and temperature and humidity sensor are all electrically connected to the control and power module.

[0013] Preferably, a sealing ring is fixed at the lower end of the mounting box. The sealing ring is fixedly sleeved on the outside of the probes of the gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor. The sealing ring seals the connection gap between the gas flow sensor, the harmful gas sensor, the temperature and humidity sensor and the mounting box.

[0014] A sealed bearing is also fixed at the lower end of the mounting box, and the drive shaft is rotatably connected to the mounting box and sealed through the sealed bearing.

[0015] Preferably, a support rod is also fixed inside the mounting box. Multiple support rods are provided, and the multiple support rods are respectively fixed to the outside of the first trigger ring and the second trigger ring.

[0016] Preferably, a fixed bracket is fixed on the airflow-facing side of the mounting box, and a flow guide is fixed at the lower end of the fixed bracket. The flow guide is used to direct the airflow in the ventilation duct to one side of the impeller and the probes of the gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor.

[0017] Preferably, the flow guide includes a gas collection hood, a first flow guide bucket, and a second flow guide bucket. The gas collection hood is fixed to the lower end of the fixed bracket, and both the first and second flow guide buckets are fixed to the rear end of the gas collection hood. The output end of the first flow guide bucket faces one side of the impeller, and the output end of the second flow guide bucket faces the probes of the gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor.

[0018] In summary, the technical effects and advantages of this utility model are as follows:

[0019] 1. In this utility model, by setting up an impeller, a first trigger ring, a second trigger ring and a follow-up triggering mechanism, the staff can quickly determine the location of the safety hazard based on the alarm information on the remote monitoring terminal or the alarm issued by the sound and light alarm, and carry out timely inspection and hazard elimination operations, thereby achieving timely prevention and control of risks and improving the safety of operations in the garbage pit.

[0020] 2. In this utility model, by setting up a gas flow sensor, a harmful gas sensor, and a temperature and humidity sensor, the gas flow, toxic and harmful gas content, temperature, and humidity in the ventilation duct can be detected. If the gas flow, toxic and harmful gas content, temperature, and humidity in the ventilation duct exceed the threshold, an alarm will be issued through the control and power module and the audible and visual alarm, thereby providing more comprehensive monitoring and achieving a comprehensive prevention and control effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment;

[0023] Figure 2 This is a cross-sectional view of the mounting box in this embodiment;

[0024] Figure 3 This is a schematic diagram of the sensor group structure in this embodiment;

[0025] Figure 4 This is a schematic diagram of the first trigger ring, the second trigger ring, and the follow-up trigger mechanism in this embodiment;

[0026] Figure 5 This is a schematic diagram of the flow guide structure in this embodiment.

[0027] In the diagram: 1. Mounting box; 11. Box cover; 12. Fixing bracket; 13. Support rod; 14. Sealed bearing; 15. Sealing ring; 2. Impeller; 21. Drive shaft; 3. Sensor group; 31. Gas flow sensor; 32. Harmful gas sensor; 33. Temperature and humidity sensor; 4. First trigger ring; 5. Second trigger ring; 6. Follow-up trigger mechanism; 61. Fixing sleeve; 62. Rotating support; 63. Movable rod; 64. Trigger block; 7. Flow guide; 71. Gas collection hood; 72. First flow guide hopper; 73. Second flow guide hopper; 8. Control and power module; 9. Audible and visual alarm. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example: Reference Figures 1-5 The device shown is a multi-point ventilation safety hazard prevention and control device for operations in a garbage pit, including an installation box 1 fixedly installed in a ventilation duct;

[0030] An impeller 2 is installed at the lower end of the mounting box 1. The drive shaft 21 in the middle of the impeller 2 rotates through the mounting box 1 and extends into the mounting box 1. A follow-up triggering mechanism 6 is fixed on the drive shaft 21. The follow-up triggering mechanism 6 includes a fixed sleeve 61, a rotating support 62, a movable rod 63 and a trigger block 64. The fixed sleeve 61 is fixed on the drive shaft 21. The rotating support 62 is fixed to the side wall of the fixed sleeve 61. One end of the movable rod 63 is rotatably sleeved on the rotating support 62. The trigger block 64 is fixed to the end of the movable rod 63 away from the rotating support 62.

[0031] The mounting box 1 also has a first trigger ring 4 and a second trigger ring 5 fixed inside. The first trigger ring 4 and the second trigger ring 5 are both arranged around the outside of the transmission shaft 21 and are coaxial with the transmission shaft 21. The first trigger ring 4 is located above the second trigger ring 5. The upper end of the movement path of the trigger block 64 coincides with the position of the first trigger ring 4 and the lower end coincides with the position of the second trigger ring 5.

[0032] The mounting box 1 also contains a control and power module 8 for collecting electrical signals generated when the trigger block 64 contacts the first trigger ring 4 or the second trigger ring 5 (the control and power module 8 consists of a control module and a power module; the control module can be a commonly used control module with alarm and remote communication functions, such as the MG series gas alarm controller; the power module can be a conventional power module that can provide power for a long time, such as an IGBT power module). The control and power module 8 also supplies power to the trigger block 64, the first trigger ring 4, and the second trigger ring 5.

[0033] The upper end of the mounting box 1 is covered by a box cover 11. The control and power module 8 is fixedly installed inside the box cover 11. The outer side of the box cover 11 is fixed with an audible and visual alarm 9 that is electrically connected to the control and power module 8 (the audible and visual alarm 9 can be a commonly used audible and visual alarm in the prior art that is suitable for this embodiment, such as the BBJ series and BZXF-01 series explosion-proof audible and visual alarms).

[0034] Based on the above structure, when the gas flowing through the ventilation duct passes through the impeller 2, it causes the impeller 2 to rotate. The rotation of the impeller 2 drives the fixed sleeve 61 to rotate via the drive shaft 21, thereby causing the movable rod 63 and the trigger block 64 to rotate. The movable rod 63 rotates along its connecting shaft with the rotating support 62, thus maintaining the trigger block 64 at a certain height under centrifugal force. When the gas flow rate in the ventilation duct increases or decreases (changes in gas flow rate reflect safety hazards; for example, a decrease in gas flow rate may indicate a blockage), the rotational speed of the impeller 2 changes, causing the centrifugal force on the trigger block 64 to increase or decrease. When the centrifugal force on the trigger block 64 is greater, the trigger block 64 rises under the action of centrifugal force and contacts the first trigger ring 4, forming an alarm signal. When triggered... When the centrifugal force on block 64 is small, the trigger block 64 descends under the action of gravity and contacts the second trigger ring 5, forming another alarm signal. Both alarm signals are sent to the remote monitoring terminal (not shown in the figure, a monitoring terminal that can receive remote communication signals, commonly used in the prior art and applicable to this embodiment, such as the 4GRTU remote monitoring and control terminal) through the control and power module 8. At the same time, an alarm is issued through the audible and visual alarm 9. The staff can quickly determine the location of the safety hazard based on the alarm information on the remote monitoring terminal or the alarm issued by the audible and visual alarm 9, and carry out timely inspection and hazard elimination operations, thereby realizing timely risk prevention and control and improving the safety of operations in the garbage pit (referring to degradation, fermentation and other reactions in the garbage pit).

[0035] Furthermore, a sensor group 3 is also installed inside the mounting box 1. The sensor group 3 includes a gas flow sensor 31, a harmful gas sensor 32, and a temperature and humidity sensor 33, which are fixed to the bottom of the mounting box 1. The gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33 can all be sensors commonly used in the prior art and suitable for this embodiment, such as: BSDF-0.5 wet gas flow meter, DVS-DN20 vortex flow meter, mining wireless methane and carbon monoxide sensor, MQ-5 semiconductor sensor, explosion-proof 4-20MA output detector, JM100HTV and JM100HTI temperature and humidity sensor, etc. One or more of them can be installed and used to achieve good monitoring effect.

[0036] The lower ends of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33 are all fixed and penetrate the mounting box 1. The gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33 are used to detect the gas flow, the content of toxic and harmful gases, the temperature, and the humidity in the ventilation duct, respectively.

[0037] The gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33 are all electrically connected to the control and power module 8.

[0038] By setting up gas flow sensor 31, harmful gas sensor 32 and temperature and humidity sensor 33, the gas flow, toxic and harmful gas content, temperature and humidity in the ventilation duct can be detected. If the gas flow, toxic and harmful gas content, temperature and humidity in the ventilation duct exceed the threshold, an alarm will be issued through the control and power module 8 and the audible and visual alarm 9, thereby providing more comprehensive monitoring and achieving the effect of comprehensive prevention and control.

[0039] Furthermore, a sealing ring 15 is fixed at the lower end of the mounting box 1. The sealing ring 15 is fixedly sleeved on the outside of the probes of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33. The sealing ring 15 seals the connection gap between the gas flow sensor 31, the harmful gas sensor 32, the temperature and humidity sensor 33 and the mounting box 1.

[0040] A sealed bearing 14 is also fixed at the lower end of the mounting box 1. The drive shaft 21 is rotatably connected to the mounting box 1 through the sealed bearing 14 and is sealed.

[0041] By using the sealed bearing 14 and the sealing ring 15, gas in the ventilation duct can be prevented from entering the mounting box 1, thereby preventing the gas from corroding the internal components (power module 8, gas flow sensor 31, harmful gas sensor 32, and temperature and humidity sensor 33, etc.) and extending the service life of the internal components of the mounting box 1.

[0042] Furthermore, a support rod 13 is fixed inside the mounting box 1. Multiple support rods 13 are provided, and the multiple support rods 13 are respectively fixed to the outside of the first trigger ring 4 and the second trigger ring 5.

[0043] Furthermore, a fixed bracket 12 is fixed on the airflow-facing side of the mounting box 1, and a flow guide 7 is fixed at the lower end of the fixed bracket 12. The flow guide 7 is used to direct the airflow in the ventilation duct to one side of the impeller 2 and the probes of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33.

[0044] The flow guide shroud 7 includes a gas collection shroud 71, a first flow guide hopper 72, and a second flow guide hopper 73. The gas collection shroud 71 is fixed to the lower end of the fixed bracket 12. The first flow guide hopper 72 and the second flow guide hopper 73 are both fixed to the rear end of the gas collection shroud 71. The output end of the first flow guide hopper 72 faces one side of the impeller 2, and the output end of the second flow guide hopper 73 faces the probes of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33.

[0045] By setting up the gas collection hood 71, the first guide bucket 72, and the second guide bucket 73, the gas collection hood 71 increases the gas collection range, the first guide bucket 72 guides a portion of the gas to one side of the impeller 2, driving the impeller 2 to rotate, and the second guide bucket 73 guides another portion of the gas to the probes of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33, thereby ensuring the detection effectiveness of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33.

[0046] The working principle of this utility model is as follows: During daily use, the gas in the ventilation duct is collected when it flows through the gas collection hood 71. The first guide bucket 72 guides a part of the gas to one side of the impeller 2, driving the impeller 2 to rotate. The second guide bucket 73 guides another part of the gas to the probes of the gas flow sensor 31, the harmful gas sensor 32, and the temperature and humidity sensor 33.

[0047] When the impeller 2 rotates, it drives the fixed sleeve 61 to rotate through the transmission shaft 21, thereby driving the movable rod 63 and the trigger block 64 to rotate. When the movable rod 63 rotates, it rotates along the connecting shaft with the rotating support 62, so that the trigger block 64 maintains a certain height under the action of centrifugal force. When the gas flow rate of the ventilation duct increases or decreases, the rotation speed of the impeller 2 changes, thereby increasing or decreasing the centrifugal force on the trigger block 64. When the centrifugal force on the trigger block 64 is large, the trigger block 64 rises under the action of centrifugal force and contacts the first trigger ring 4, forming an alarm signal. When the centrifugal force on the trigger block 64 is small, the trigger block 64 falls under the action of gravity and contacts the second trigger ring 5, forming another alarm signal. Both alarm signals send alarm information to the remote monitoring terminal through the control and power module 8, and at the same time, the alarm is issued through the sound and light alarm 9.

[0048] Gas flow sensor 31, harmful gas sensor 32 and temperature and humidity sensor 33 are used to detect gas flow, toxic and harmful gas content, temperature and humidity in the ventilation duct, respectively. If the gas flow, toxic and harmful gas content, temperature and humidity in the ventilation duct exceed the threshold, an alarm will be issued through the control and power module 8 and the audible and visual alarm 9.

[0049] Staff can quickly determine the location of safety hazards based on alarm information on the remote monitoring terminal or alarms issued by the audible and visual alarm 9, and carry out timely inspections and hazard removal operations, thereby achieving timely risk control and improving the safety of operations inside the garbage pit.

[0050] It should be further noted that the first trigger ring, the second trigger ring, and the trigger block involved in this utility model patent application are made of conductive materials. When the trigger block contacts the first trigger ring or the second trigger ring, a circuit is formed, thereby generating an electrical signal. The technical features such as the power module, the audible and visual alarm, the gas flow sensor, the harmful gas sensor, and the temperature and humidity sensor should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can adopt conventional choices in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated in detail.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit, comprising an installation box (1) fixedly installed inside a ventilation duct, characterized in that: An impeller (2) is installed at the lower end of the mounting box (1). The drive shaft (21) in the middle of the impeller (2) rotates through the mounting box (1) and extends into the mounting box (1). A follow-up trigger mechanism (6) is fixed on the drive shaft (21). The follow-up trigger mechanism (6) includes a fixed sleeve (61), a rotating support (62), a movable rod (63), and a trigger block (64). The fixed sleeve (61) is fixed on the drive shaft (21). The rotating support (62) is fixed to the side wall of the fixed sleeve (61). One end of the movable rod (63) is rotatably sleeved on the rotating support (62). The trigger block (64) is fixed to the end of the movable rod (63) away from the rotating support (62). The mounting box (1) also has a first trigger ring (4) and a second trigger ring (5) fixed inside. The first trigger ring (4) and the second trigger ring (5) are both arranged around the outside of the transmission shaft (21) and are coaxial with the transmission shaft (21). The first trigger ring (4) is located at the upper end of the second trigger ring (5). The upper end of the movement path of the trigger block (64) coincides with the position of the first trigger ring (4) and the lower end coincides with the position of the second trigger ring (5). The mounting box (1) is also equipped with a control and power module (8) for collecting electrical signals generated when the trigger block (64) contacts the first trigger ring (4) or the second trigger ring (5). The control and power module (8) also supplies power to the trigger block (64), the first trigger ring (4), and the second trigger ring (5). The upper end of the mounting box (1) is covered with a box cover (11), the control and power module (8) is fixedly installed inside the box cover (11), and an audible and visual alarm (9) electrically connected to the control and power module (8) is fixed on the outside of the box cover (11).

2. The multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit according to claim 1, characterized in that: The mounting box (1) is also equipped with a sensor group (3). The sensor group (3) includes a gas flow sensor (31), a harmful gas sensor (32), and a temperature and humidity sensor (33) fixed to the bottom of the mounting box (1). The lower ends of the gas flow sensor (31), the harmful gas sensor (32), and the temperature and humidity sensor (33) are all formed with probes that penetrate the mounting box (1). The gas flow sensor (31), the harmful gas sensor (32), and the temperature and humidity sensor (33) are used to detect the gas flow, the content of toxic and harmful gases, the temperature, and the humidity in the ventilation duct, respectively. The gas flow sensor (31), harmful gas sensor (32), and temperature and humidity sensor (33) are all electrically connected to the control and power module (8).

3. The multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit according to claim 2, characterized in that: A sealing ring (15) is fixed at the lower end of the mounting box (1). The sealing ring (15) is fixedly sleeved on the outside of the probes of the gas flow sensor (31), the harmful gas sensor (32), and the temperature and humidity sensor (33). The sealing ring (15) seals the connection gap between the gas flow sensor (31), the harmful gas sensor (32), the temperature and humidity sensor (33) and the mounting box (1). The lower end of the mounting box (1) is also fixed with a sealed bearing (14), and the drive shaft (21) is rotatably connected to the mounting box (1) and sealed through the sealed bearing (14).

4. A multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit, as described in any one of claims 1-3, characterized in that: The mounting box (1) is also fixed with a support rod (13). Multiple support rods (13) are provided, and the multiple support rods (13) are respectively fixed to the outside of the first trigger ring (4) and the second trigger ring (5).

5. The multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit according to claim 2, characterized in that: The mounting box (1) is fixed with a fixed bracket (12) on the flow-facing side. The lower end of the fixed bracket (12) is fixed with a flow guide (7). The flow guide (7) is used to guide the airflow in the ventilation duct to one side of the impeller (2) and the probes of the gas flow sensor (31), the harmful gas sensor (32), and the temperature and humidity sensor (33).

6. The multi-point ventilation safety hazard prevention and control device for operations inside a garbage pit according to claim 5, characterized in that: The flow guide shroud (7) includes a gas collection shroud (71), a first flow guide bucket (72), and a second flow guide bucket (73). The gas collection shroud (71) is fixed to the lower end of the fixed bracket (12). The first flow guide bucket (72) and the second flow guide bucket (73) are both fixed to the rear end of the gas collection shroud (71). The output end of the first flow guide bucket (72) faces one side of the impeller (2), and the output end of the second flow guide bucket (73) faces the probes of the gas flow sensor (31), the harmful gas sensor (32), and the temperature and humidity sensor (33).

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