A confined space work rescue device and method of use

Abstract

The present application relates to the technical field of limited space operation, and particularly relates to a limited space operation rescue device and a use method thereof. The device comprises a folding telescopic support frame, a blowing fan, a monitoring device and a ring-shaped blowing mechanism. The ring-shaped blowing mechanism comprises a ring-shaped base, a folding and unfolding motor and a plurality of folding and unfolding assemblies are arranged on the ring-shaped base, adjacent folding and unfolding assemblies are rotationally connected through a hinged assembly, a blowing branch pipe is arranged around the folding and unfolding assembly, the blowing branch pipe is arranged in communication with the folding and unfolding assembly, the folding and unfolding assembly is arranged in communication with a blowing main pipe, and the blowing main pipe is connected with the blowing fan. The folding telescopic support frame is provided with a lifting mechanism, and the lifting mechanism is connected with a rescue mechanism. The use method of the device is also disclosed. The ring-shaped blowing mechanism adopts a plurality of small-size blowing branch pipes distributed in a ring shape, thereby realizing continuous, uniform and stable blowing. The rescue mechanism is arranged, and when an abnormal situation occurs, the rescue mechanism is used to transfer personnel in the limited space out of the limited space, thereby relieving the poisoning situation in the transfer process.

Description

Technical Field

[0001] This invention relates to the field of confined space operation technology, and in particular to a confined space operation rescue device and its usage method. Background Technology

[0002] Confined spaces are enclosed or partially enclosed spaces that are not used as fixed workplaces, are accessible to people, have poor ventilation, and are prone to accumulating toxic or explosive gases or experiencing oxygen deficiency. Examples include inspection wells, septic tanks, biogas digesters, storage tanks, and reaction vessels. These are generally not places for long-term work; personnel only enter confined spaces when necessary for temporary tasks such as maintenance, repairs, and cleaning. The vast majority of deaths are caused by poisoning and asphyxiation.

[0003] Current technology uses large ventilation ducts to supply air to the bottom of confined spaces. However, due to the large size of the ducts, they must be pulled out before personnel can enter or exit, and then put back in afterward. This disrupts continuous airflow, causing fluctuations in the concentration of harmful gases in the confined space and affecting operational safety. Furthermore, if a worker is in danger, blind rescue attempts could lead to further casualties, requiring rescuers to re-enter the confined space wearing protective gear, which is unsafe. Summary of the Invention

[0004] The purpose of this invention is to provide a confined space operation rescue device and its usage method to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides a confined space operation rescue device, including a folding telescopic support frame, a blower, and monitoring equipment. The blower is connected to an annular air supply mechanism. The annular air supply mechanism includes an annular base, on which several retractable components are detachably mounted. One retractable component is connected to a retractable motor. Adjacent retractable components are rotatably connected via hinge components. An air supply branch pipe is wound around the retractable component and communicates with the retractable component. The retractable component communicates with the main air supply pipe, which is connected to the blower. The folding telescopic support frame is equipped with a lifting mechanism, which is connected to a rescue mechanism.

[0006] Preferably, the take-up and release assembly includes a hollow spool with a connecting valve on it. The hinge assembly includes a first single-sided U-shaped hinge joint at both ends of the spool. Adjacent first single-sided U-shaped hinge joints are connected by double-sided U-shaped hinge joints. Each double-sided U-shaped hinge joint includes a mounting bearing seat. A connecting shaft is rotatably connected to the mounting bearing seat. A second single-sided U-shaped hinge joint is provided at both ends of the connecting shaft. The second single-sided U-shaped hinge joint is connected to the first single-sided U-shaped hinge joint via a cross hinge shaft. A drive gear is provided on the connecting shaft. The drive gear is connected to the take-up and release motor via a gear.

[0007] Preferably, the annular base includes at least two detachably connected arc-shaped plates, each arc-shaped plate having a positioning slot or a fixing latch; the bottom of the mounting bearing seat has a connector or a latch, the connector being located within the positioning slot; the latch is connected to the fixing latch.

[0008] Preferably, the folding telescopic support frame includes a fixed plate, and a telescopic support leg is hinged to the circumferential side of the fixed plate. The telescopic support leg includes a fixed tube and a telescopic tube. The telescopic tube has several linearly distributed pin holes, and a fixing pin is provided on the fixed tube.

[0009] Preferably, the lifting mechanism includes a winch, the wire rope of which is wound around a pulley on a fixed disc.

[0010] Preferably, the rescue mechanism includes a telescopic frame and an isolation shield mounted on the telescopic frame; The telescopic frame includes a mounting plate that is slidably mounted on a steel wire rope. A rope winding assembly is provided at the bottom of the mounting plate. Several telescopic rods are provided on the circumference of the mounting plate. The telescopic ends of the telescopic rods are connected to guide rods. Adjacent guide rods are connected by an X-shaped hinge frame. The four ends of the X-shaped hinge frame are provided with collars. The two lower collars are fixed to the bottom of the guide rods, and the two upper collars are slidably mounted on the guide rods, with one of the collars connected to an opening and closing telescopic component. The inner wall of the isolation enclosure is equipped with a strip-shaped protective airbag connected to a ventilation pipe. The ventilation pipe is connected to a ventilation fan. The strip-shaped protective airbag is equipped with an air outlet valve. The isolation enclosure is equipped with a pressure exhaust valve. The bottom of the isolation enclosure is equipped with an annular sealing airbag connected to the ventilation pipe.

[0011] Preferably, the installation plate has a through hole in the center, and an anti-slip sleeve is installed inside the through hole; The rope winding assembly includes a winding box, inside which a rope winding shaft is rotatably connected. The rope winding shaft is connected to a rope winding motor. A through hole is provided in the middle of the rope winding shaft. One end of the steel wire rope passes through the through hole and the winding box and is equipped with a connecting buckle. The connecting buckle is connected to the worker's full-body safety belt.

[0012] Preferably, the monitoring equipment includes a monitoring terminal installed in the external space, a fixed gas detection component with a release rope, a follow-up gas detection component installed on the safety helmet, and an image acquisition device installed on the safety helmet. The fixed gas detection component, the follow-up gas detection component, and the image acquisition device all communicate with the monitoring terminal.

[0013] One method of use, employing the aforementioned confined space rescue device, comprises the following steps: Step S1: Set up a folding telescopic support frame, install a ring-shaped air supply mechanism, start the air supply fan for ventilation, and lower a fixed gas detection component to monitor the concentration of harmful gases in the confined space in real time until the concentration of harmful gases is lower than the threshold. Step S2: After wearing protective equipment with a follow-up gas detection component and image acquisition device, and putting on a full-body safety harness, the staff carries a walkie-talkie and is lowered into the confined space by the lifting mechanism to carry out the operation. Safety officers can monitor the situation of staff and the concentration of harmful gases in the confined space in real time through a monitoring terminal in the external space. If the concentration of harmful gases exceeds the threshold or if staff behave abnormally, staff will be notified via intercom and then escorted out of the confined space by lifting and rescue agencies.

[0014] The preferred procedure for evacuating staff from a confined space using lifting and rescue agencies is as follows: Step S21: Activate the opening and closing telescopic component, causing the collar on the guide rod to move towards the fixed collar on the same guide rod, causing several guide rods to expand outward and unfold the telescopic frame; Step S22: Start the rope winding motor to pull the worker into the unfolded telescopic frame. After turning off the rope winding motor, start the ventilation fan. The strip protective airbag is supported and air is supplied to the isolation cover. The annular sealing airbag is supported and the lifting mechanism is started to pull the worker out of the confined space.

[0015] Therefore, the present invention, employing the above-mentioned confined space operation rescue device and method, has the following beneficial effects: (1) The ring-shaped air supply mechanism adopts multiple small-sized air supply branches distributed in a ring to replace a single large-sized air supply pipe, which realizes continuous air supply without affecting normal personnel access to the limited space. It also realizes the simultaneous retraction and release of multiple retraction and release components, avoiding the retraction and release of multiple pipes, and the position setting is evenly and stably distributed.

[0016] (2) A rescue organization is set up so that in case of an emergency, people in the confined space can be transferred out through the rescue organization. During the transfer, the space inside the rescue organization is continuously ventilated at a certain pressure (natural wind or high oxygen gas) to alleviate the poisoning situation during the transfer.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a confined space operation and rescue device according to the present invention; Figure 2 This is a schematic diagram of the folding telescopic support frame structure of the present invention; Figure 3 This is a schematic diagram of the hinge assembly structure of the present invention; Figure 4 This is a schematic diagram of the rescue mechanism structure of the present invention; Figure 5 This is a side view of the rescue mechanism of the present invention; Figure 6 This is a schematic diagram of the rope winding assembly structure of the present invention.

[0019] Figure Labels 1. Folding telescopic support frame; 11. Fixed plate; 12. Fixed tube; 13. Telescopic tube; 131. Pin hole; 14. Fixed pin; 15. Pulley; 2. Air supply fan; 3. Lifting mechanism; 4. Circular air supply mechanism; 41. Circular base; 42. Retraction assembly; 421. Reel; 422. Connecting valve; 43. Retraction motor; 44. Hinge assembly; 441. First single-sided U-shaped hinge joint; 442. Mounting bearing seat; 443. Second single-sided U-shaped hinge joint; 444. Cross hinge shaft; 445. Drive gear; 45. 46. ​​Air supply branch pipe; 5. Air supply main pipe; 6. Rescue mechanism; 7. Telescopic frame; 8. Mounting plate; 9. Telescopic pole; 10. Guide rod; 11. X-type hinge frame; 12. Collar; 13. Opening and closing telescopic component; 14. Isolation cover; 15. Strip protective airbag; 16. Air outlet valve; 17. Pressure exhaust valve; 18. Annular sealing airbag; 19. Ventilation pipe; 10. Ventilation fan; 11. Rope winding assembly; 12. Retraction box; 13. Rope winding motor; 14. Rope winding shaft; 15. Cable guide hole. Detailed Implementation

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example 1 like Figure 1 As shown, a confined space operation rescue device includes a folding telescopic support frame 1, a blower 2, and monitoring equipment (not shown in the figure).

[0023] like Figure 2 As shown, the folding telescopic support frame 1 provides stable support for lifting. The folding telescopic support frame 1 is equipped with a lifting mechanism 3. The folding telescopic support frame 1 includes a fixed plate 11. Telescopic support legs are hinged to the circumferential side of the fixed plate 11. The telescopic support legs include a fixed tube 12 and a telescopic tube 13. The telescopic tube 13 has several linearly distributed pin holes 131. The fixed tube 12 is equipped with a fixing pin 14. The support height can be adjusted according to the actual situation and is easy to store.

[0024] The air supply fan 2 is connected to an annular air supply mechanism 4. The annular air supply mechanism 4 includes an annular base 41. To facilitate the laying and retraction of multiple small-sized pipes, several retraction components 42 are detachably mounted on the annular base 41. One of the retraction components 42 is connected to a retraction motor 43. Adjacent retraction components 42 are rotatably connected via a hinge component 44. The retraction component 42 includes a hollow reel 421, on which a connecting valve 422 is mounted. Figure 3 As shown, the hinge assembly 44 includes a first single-sided U-shaped hinge joint 441 disposed at both ends of the reel 421. Adjacent first single-sided U-shaped hinge joints 441 are connected by double-sided U-shaped hinge joints. The double-sided U-shaped hinge joint includes a mounting bearing seat 442. The mounting bearing seat 442 is rotatably connected to a connecting shaft. The two ends of the connecting shaft are provided with second single-sided U-shaped hinge joints 443. The second single-sided U-shaped hinge joints 443 are connected to the first single-sided U-shaped hinge joints 441 through a cross hinge shaft 444. A drive gear 445 is disposed on the connecting shaft. The drive gear 445 is connected to the take-up and release motor 43 through a gear, so that one motor drives multiple reels 421 to rotate, achieving synchronous take-up and release. Air supply branch pipes 45 are wound around the spool 421. The size of the several air supply branch pipes 45 is much smaller than that of a single ventilation pipe 53. The several air supply branch pipes 45 are distributed circumferentially so as not to affect the entry and exit operation. The air supply branch pipes 45 are connected to the hollow spool 421. The hollow spool 421 is connected to the main air supply pipe 46. The main air supply pipe 46 is connected to the air supply fan 2, so that multiple air supply branch pipes 45 can supply air at the same time.

[0025] The annular base 41 includes two detachably connected arc-shaped plates (semicircles). In this embodiment, the arc-shaped plates are provided with positioning slots (a detachable connection can also be achieved by using a fixed locking tongue and a latch). The bottom of the mounting bearing seat 442 is provided with a plug-in (cylinder). The plug-in is inserted into the positioning slot, which realizes the installation of multiple retractable components 42.

[0026] In this embodiment, the lifting mechanism 3 includes a winch, and the winch's wire rope is wound around a pulley 15 on a fixed disc 11. Figures 4-5As shown, the lifting mechanism 3 is connected to the rescue mechanism 5. The rescue mechanism 5 includes a telescopic frame 51 and an isolation cover 52 fitted onto the telescopic frame 51. The telescopic frame 51 includes a mounting plate 511 slidably mounted on a wire rope. A rope winding assembly 55 is provided at the bottom of the mounting plate 511. Several telescopic rods 512 are provided on the circumference of the mounting plate 511. The telescopic ends of the telescopic rods 512 are connected to guide rods 513. Adjacent guide rods 513 are connected by an X-shaped hinge frame 514. The four ends of the X-shaped hinge frame 514 are provided with collars 515. The two lower collars 515 are fixed to the bottom of the guide rods 513, and the two upper collars 515 are slidably mounted on the guide rods 513, with one of the collars 515 connected to an opening and closing telescopic component 516. A strip-shaped protective airbag 521 connected to a ventilation pipe 53 is provided on the circumferential side of the inner wall of the isolation cover 52. The ventilation pipe 53 is connected to a ventilation fan 54. The strip-shaped protective airbag 521 is provided with an air outlet valve 522. A pressure exhaust valve 523 is provided on the isolation cover 52. An annular sealing airbag 524 is provided at the bottom of the isolation cover 52 and is connected to the ventilation pipe 53.

[0027] The installation plate 511 has a through hole in its center, and an anti-slip sleeve (rubber sleeve) is installed inside the through hole to prevent the rescue mechanism 5 from sliding freely under normal conditions. Figure 6 As shown, the rope take-up assembly 55 includes a take-up box 551, a take-up shaft 553 is rotatably connected inside the take-up box 551, a take-up motor 552 is connected to the take-up shaft 553, a wire hole 554 is provided in the middle of the take-up shaft 553, one end of the wire rope passes through the wire hole 554 and the take-up box 551 and is provided with a connecting buckle, and the connecting buckle is connected to the worker's full-body safety belt.

[0028] In order to understand the environment in the confined space in real time, monitoring equipment is set up. The monitoring equipment includes a monitoring terminal set up in the external space, a fixed gas detection component with a release rope, a follow-up gas detection component installed on the safety helmet, and an image acquisition device installed on the safety helmet. The fixed gas detection component, the follow-up gas detection component, and the image acquisition device all communicate with the monitoring terminal.

[0029] Example 2 One method of use, employing a confined space operation rescue device as described in Example 1, includes the following specific steps: Step S1: Set up the folding telescopic support frame 1, install the ring-shaped air supply mechanism 4, start the air supply fan 2 for ventilation, and lower the fixed gas detection component to monitor the concentration of harmful gases in the confined space in real time until the concentration of harmful gases is lower than the threshold.

[0030] Step S2: The staff wears protective equipment with a follow-up gas detection component and an image acquisition device, and puts on a full-body safety belt. They carry a walkie-talkie and are lowered into the confined space by the lifting mechanism 3 to carry out the work.

[0031] Safety officers can monitor the situation of staff and the concentration of harmful gases in the confined space in real time through a monitoring terminal in the external space.

[0032] When the concentration of harmful gases exceeds the threshold or abnormal behavior occurs among staff, the system notifies staff via intercom, and then uses lifting mechanism 3 and rescue mechanism 5 to remove staff from the confined space. The specific process of removing staff from the confined space using lifting mechanism 3 and rescue mechanism 5 is as follows: Step S21: Activate the opening and closing telescopic component 516, so that the collar 515 on the guide rod 513 moves to the collar 515 fixed on the same guide rod 513, so that several guide rods 513 expand outward and unfold the telescopic frame 51.

[0033] Step S22: Start the rope retraction motor 552 to pull the worker into the unfolded telescopic frame 51. After turning off the rope retraction motor 552, start the ventilation fan 54. The strip-shaped protective airbag 521 is supported and supplies air to the isolation cover 52. The annular sealing airbag 524 is supported and fits against the lower body of the worker, so that the sealing cover forms a relatively sealed environment, reducing the further entry of toxic gases into the sealing cover. When a certain pressure is reached during the air supply process, the gas is discharged from the pressure exhaust valve or the small gap between the human body and the annular sealing airbag 524. Toxic gases cannot enter the sealing cover, so that the worker's poisoning is alleviated in the ventilated and oxygen-rich environment. At the same time, start the lifting mechanism 3 to pull the worker out of the confined space.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A confined space operation rescue device, comprising a folding telescopic support frame, a blower, and monitoring equipment, characterized in that: The air supply fan is connected to a ring-shaped air supply mechanism; the ring-shaped air supply mechanism includes a ring-shaped base, on which several retractable components are detachably mounted, one of which is connected to a retractable motor, adjacent retractable components are rotatably connected by a hinge component, an air supply branch pipe is wound around the retractable component, the air supply branch pipe is connected to the retractable component, the retractable component is connected to the main air supply pipe, and the main air supply pipe is connected to the air supply fan; the folding telescopic support frame is equipped with a lifting mechanism, and the lifting mechanism is connected to a rescue mechanism.

2. The confined space operation rescue device according to claim 1, characterized in that: The take-up and release assembly includes a hollow spool with a connecting valve on it. The hinge assembly includes a first single-sided U-shaped hinge joint at both ends of the spool. Adjacent first single-sided U-shaped hinge joints are connected by double-sided U-shaped hinge joints. Each double-sided U-shaped hinge joint includes a mounting bearing seat, which is rotatably connected to a connecting shaft. The connecting shaft has a second single-sided U-shaped hinge joint at both ends. The second single-sided U-shaped hinge joint is connected to the first single-sided U-shaped hinge joint via a cross hinge shaft. The connecting shaft has a drive gear, which is connected to the take-up and release motor via a gear.

3. A confined space operation rescue device according to claim 2, characterized in that: The annular base includes at least two detachably connected arc-shaped plates, each with a positioning slot or a fixing latch; the bottom of the mounting bearing seat is provided with a connector or a latch, the connector being located within the positioning slot; the latch is connected to the fixing latch.

4. A confined space operation rescue device according to claim 3, characterized in that: The folding telescopic support frame includes a fixed plate, and a telescopic support leg is hinged to the circumference of the fixed plate. The telescopic support leg includes a fixed tube and a telescopic tube. The telescopic tube has several linearly distributed pin holes, and the fixed tube is provided with a fixing pin.

5. A confined space operation rescue device according to claim 4, characterized in that: The lifting mechanism includes a winch, whose wire rope is wound around a pulley on a fixed disc.

6. A confined space operation rescue device according to claim 5, characterized in that: The rescue equipment includes a telescopic frame and an isolation shield mounted on the telescopic frame; The telescopic frame includes a mounting plate that is slidably mounted on a steel wire rope. A rope winding assembly is provided at the bottom of the mounting plate. Several telescopic rods are provided on the circumference of the mounting plate. The telescopic ends of the telescopic rods are connected to guide rods. Adjacent guide rods are connected by an X-shaped hinge frame. The four ends of the X-shaped hinge frame are provided with collars. The two lower collars are fixed to the bottom of the guide rods, and the two upper collars are slidably mounted on the guide rods, with one of the collars connected to an opening and closing telescopic component. The inner wall of the isolation enclosure is equipped with a strip-shaped protective airbag connected to a ventilation pipe. The ventilation pipe is connected to a ventilation fan. The strip-shaped protective airbag is equipped with an air outlet valve. The isolation enclosure is equipped with a pressure exhaust valve. The bottom of the isolation enclosure is equipped with an annular sealing airbag connected to the ventilation pipe.

7. A confined space operation rescue device according to claim 6, characterized in that: The installation plate has a through hole in the center, and an anti-slip sleeve is installed inside the through hole; The rope winding assembly includes a winding box, inside which a rope winding shaft is rotatably connected. The rope winding shaft is connected to a rope winding motor. A through hole is provided in the middle of the rope winding shaft. One end of the steel wire rope passes through the through hole and the winding box and is equipped with a connecting buckle. The connecting buckle is connected to the worker's full-body safety belt.

8. A confined space operation rescue device according to claim 7, characterized in that: The monitoring equipment includes a monitoring terminal installed in the external space, a fixed gas detection component with a release rope, a follow-up gas detection component installed on a safety helmet, and an image acquisition device installed on a safety helmet. The fixed gas detection component, the follow-up gas detection component, and the image acquisition device all communicate with the monitoring terminal.

9. A method of use, employing the confined space operation and rescue device as described in claim 8, characterized in that, The specific steps are as follows: Step S1: Set up a folding telescopic support frame, install a ring-shaped air supply mechanism, start the air supply fan for ventilation, and lower a fixed gas detection component to monitor the concentration of harmful gases in the confined space in real time until the concentration of harmful gases is lower than the threshold. Step S2: After wearing protective equipment with a follow-up gas detection component and image acquisition device, and putting on a full-body safety harness, the staff carries a walkie-talkie and is lowered into the confined space by the lifting mechanism to carry out the operation. Safety officers can monitor the situation of staff and the concentration of harmful gases in the confined space in real time through a monitoring terminal in the external space. When the concentration of harmful gases exceeds the threshold or staff behavior becomes abnormal, staff are notified via intercom and then lifted and rescued out of the confined space.

10. A method of use according to claim 9, characterized in that: The specific process of using evacuation and rescue agencies to remove staff from the confined space is as follows: Step S21: Activate the opening and closing telescopic component, causing the collar on the guide rod to move towards the fixed collar on the same guide rod, causing several guide rods to expand outward and unfold the telescopic frame; Step S22: Start the rope winding motor to pull the worker into the unfolded telescopic frame. After turning off the rope winding motor, start the ventilation fan. The strip protective airbag is supported and air is supplied to the isolation cover. The annular sealing airbag is supported and the lifting mechanism is started to pull the worker out of the confined space.

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