Water supply and drainage fire-fighting inspection well shaft

Abstract

The application relates to a water supply and drainage fire-fighting inspection well shaft and belongs to the technical field of fire-fighting inspection well shafts. The bottom end of a base is fixedly provided with a well shaft body, and water inlet pipes and water outlet pipes are arranged at the two ends of the base. An exhaust pipe is arranged on the side wall of the well shaft body, a ventilation mechanism is arranged in the exhaust pipe, the ventilation mechanism comprises a fan and an arc-shaped baffle, the fan is arranged at the air outlet end of the exhaust pipe, and the arc-shaped baffle is rotationally arranged at the air inlet end of the exhaust pipe. A protection mechanism is arranged in the well shaft body, the protection mechanism comprises a turnover plate, an air bag and a supporting plate, the turnover plate, the air bag, the supporting plate and the fan are connected through linkage assemblies, when the turnover plate rotates downward, the air bag is controlled to expand, the supporting plate is controlled to rotate and the fan is controlled to open through the linkage assemblies, and the problems that the bearing capacity of the anti-falling mechanism of the current water supply and drainage fire-fighting inspection well shaft is limited and the anti-falling mechanism is prone to failure are solved.

Description

Technical Field

[0001] This invention belongs to the field of fire inspection well technology, and specifically relates to a water supply and drainage fire inspection well. Background Technology

[0002] As an important component of urban municipal infrastructure, water supply, drainage and fire protection inspection wells are widely distributed in urban roads, residential areas and public areas. They are mainly used for the inspection, maintenance and fault diagnosis of water supply and drainage pipelines and fire protection pipelines. They are key facilities to ensure the stable operation of urban water supply and drainage systems and fire protection systems. Their structure usually includes a base, well body and well cover. As a component that is in direct contact with the outside world, the well cover not only needs to withstand dynamic loads such as vehicle rolling and pedestrian trampling, but also needs to resist the effects of natural environmental factors such as wind and sun, rain and snow erosion and temperature changes over a long period of time.

[0003] In actual use, manhole covers are prone to cracking at the edges when repeatedly run over by heavy vehicles, and may even shift entirely. This is especially true at night when the light is dim or pedestrians are not paying attention. If a pedestrian steps on a defective manhole cover, there is a high risk of falling.

[0004] Existing technologies for fall protection measures in water supply, drainage, and fire protection inspection wells are significantly inadequate. Currently, most cities still do not equip inspection wells with dedicated fall protection mechanisms, relying solely on the structural integrity of the manhole cover for safety protection. The reliability of this protection is entirely dependent on the condition of the manhole cover and cannot provide effective secondary protection. While some newly built or renovated inspection wells have attempted to adopt fall protection measures, these are mostly simple mesh chain structures, where metal mesh or nylon chains are fixed to the inner wall of the well near the top. This approach has several drawbacks: First, the mesh chain has limited load-bearing capacity and cannot provide stable support against the impact of a falling adult pedestrian, easily leading to chain breakage and protection failure. Second, the mesh chain is constantly exposed to a humid environment inside the well, making it prone to corrosion or aging. Its structural strength decreases significantly over time, and the use of bolts or wire bindings for fixing the chain can easily lead to loosening and detachment at the fixing points during long-term use, further reducing the reliability of the protection.

[0005] In addition, harmful gases such as methane and hydrogen sulfide are easily generated at the bottom of water supply, drainage and fire protection inspection wells. If these gases accumulate inside the well for a long time, they may cause secondary injuries to pedestrians in emergency situations such as falling into the well.

[0006] Therefore, it is necessary to provide a new type of water supply, drainage and fire protection inspection well to solve the above-mentioned technical problems. Summary of the Invention

[0007] This invention overcomes the shortcomings of the prior art and proposes a water supply, drainage and fire protection inspection well; it solves the problems of limited load-bearing capacity and easy failure of the current anti-fall mechanism of water supply, drainage and fire protection inspection wells.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0009] A water supply, drainage, and fire protection inspection well includes a base, a well body fixedly mounted on the upper end of the base, an inlet pipe and an outlet pipe respectively mounted at both ends of the base, both of which are connected to the interior of the well body; an exhaust pipe is mounted on the side wall of the well body, and a ventilation mechanism is mounted inside the exhaust pipe, the ventilation mechanism including a fan and an arc-shaped baffle, the fan being mounted at the outlet end of the exhaust pipe, and the arc-shaped baffle being rotatably mounted at the inlet end of the exhaust pipe; a protective mechanism is mounted inside the well body, the protective mechanism including a flip plate, an airbag, and a support plate, two symmetrically mounted flip plates being rotatably mounted on the upper side inside the well body, two airbags being symmetrically mounted in the middle of the inner side of the well body, and a ring of support plates being rotatably mounted on the lower side inside the well body, the flip plates, airbags, support plates, and fan being connected by a linkage component, when the flip plate rotates downward, the linkage component controls the airbags to inflate, the support plate to rotate, and the fan to start.

[0010] Furthermore, the ends of the two rotating plates that are far apart from each other are rotatably connected to the inner wall of the well body; two vertical guide rods are provided below the ends of the two rotating plates that are far apart from each other, and the guide rods are fixedly connected to the inner wall of the well body; a spring is sleeved on the outside of each guide rod, and the lower end of the spring is fixedly connected to the lower end of the guide rod; a slider is slidably sleeved on the outside of each guide rod, and the lower end of the slider is in contact with the upper end of the spring; a connecting rod is hinged on the outside of each slider, and the end of the connecting rod that is far away from the slider is hinged to the lower end face of the rotating plate on the same side.

[0011] Furthermore, two symmetrical gas storage tanks are fixedly installed at the middle height of the inner wall of the well body. The gas outlet of each gas storage tank is connected to the gas bag on the same side through a gas outlet pipe. A switching valve is installed on each gas outlet pipe. The switching valve includes a valve body and a ball valve. The ball valve is rotatably installed inside the valve body and has a connecting hole.

[0012] Furthermore, an installation ring is fixedly installed on the inner wall of the well body, and a support plate is rotatably installed inside the installation ring, with one end of the support plate rotatably connected to the inner wall of the installation ring.

[0013] Furthermore, the linkage assembly includes a T-shaped rod, a vertical rod, a rack, a U-shaped block, an incomplete gear, a ring plate, and an L-shaped rod. A U-shaped block is fixedly installed at the middle of the two rotating plates at their opposite ends. A T-shaped rod is slidably installed inside each U-shaped block. A vertical rod is rotatably installed at the lower end of the T-shaped rod, sliding vertically against the inner wall of the shaft body. A vertical rack is fixed at the lower end of the vertical rod, and an L-shaped rod is fixed at the lower end of the rack. The L-shaped rod includes a vertical rod and a horizontal rod, with the horizontal rod extending radially along the shaft body. The lower end of the vertical rod is adjacent to the outer side of the horizontal rod. One end is fixedly connected; a protruding rod is rotatably installed on the valve body of each switching valve. The inner end of the protruding rod is fixedly connected to the ball valve, and an incomplete gear is fixedly installed on the outer end of the protruding rod. The incomplete gear is in a preliminary meshing state with the rack on the same side; a circular ring plate is rotatably installed inside the mounting ring. A ring groove is provided on the side wall of the circular ring plate. The end of the support plate away from the inner wall of the mounting ring passes through the corresponding placement groove and extends into the inner side of the circular ring plate; two inclined grooves are provided on the circular ring plate. The height of one end of the inclined groove is higher than the height of the other end of the inclined groove; the horizontal rods of the two L-shaped rods are slidably inserted into the two inclined grooves respectively.

[0014] Furthermore, the linkage component also includes a trapezoidal block; a trapezoidal block is fixedly installed at the lower end of one of the L-shaped rods, and a contact slope is provided on the trapezoidal block. A control box is also fixedly installed inside the shaft body, and the control box is electrically connected to the blower; a start button is provided on the inner side of the control box, and the start button is located above the contact slope at the upper end of the trapezoidal block. The control box is electrically connected to the start button.

[0015] Furthermore, a control cabinet and an alarm are fixedly installed on the outside of the exhaust pipe's outlet end, and the control cabinet, control box, and alarm are electrically connected.

[0016] Furthermore, two symmetrical U-shaped rods are rotatably installed on the inner wall of the well body. Two vertical rods are slidably inserted into the two U-shaped rods respectively, and a handle is fixedly installed at one end of the outer side of each U-shaped rod. Two extension rods are fixedly installed on each vertical rod, and the extension rods are located on the lower side of the U-shaped rod.

[0017] Furthermore, a detachable manhole cover is installed at the upper opening of the manhole body, and a row of climbing frames is installed on the inner wall of the manhole body.

[0018] Furthermore, the two curved baffles are rotatably connected to the intake end of the exhaust pipe via the same pivot, which remains tilted.

[0019] The beneficial effects of this invention compared to the prior art are as follows:

[0020] (1) The design of the protective mechanism achieves dual fall protection. When a pedestrian falls, the protective mechanism is activated quickly, causing the compressed gas in the gas tank to rapidly fill the airbag. The airbag expands instantly to form a soft buffer layer with a certain load-bearing capacity. This design can effectively reduce the impact force in the initial stage of a pedestrian's fall, reducing the risk of injury from direct impact with hard objects and providing the first line of safety protection for pedestrians. While the airbag buffers the fall, the support plate, driven by the ring plate, converges towards the axis of the shaft body to form a complete support frame. The support frame supports the expanded airbag and together bears the weight of the falling pedestrian, preventing the pedestrian from falling further. This dual protection mechanism works together to greatly enhance the reliability and effectiveness of fall protection, providing more comprehensive safety for pedestrians.

[0021] (2) Through the design of the ventilation mechanism, the ventilation mechanism operates synchronously during the activation of the protective mechanism, quickly drawing harmful gases such as methane and hydrogen sulfide from the bottom of the well body into the exhaust pipe and discharging them to the outside. This design can promptly discharge harmful gases from the well body, preventing pedestrians from suffering secondary injuries due to inhalation of harmful gases and ensuring their safety.

[0022] (3) The filter and protective cover installed at the exhaust pipe outlet can effectively prevent rainwater and debris from entering the exhaust pipe, ensure the normal operation of the ventilation mechanism, guarantee ventilation efficiency, and further improve the exhaust effect of harmful gases. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention after half-section of the well body;

[0026] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0027] Figure 4 This is a schematic diagram of the internal structure of the base and the well body after partial cross-section;

[0028] Figure 5 This is a schematic diagram of the protective mechanism;

[0029] Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle;

[0030] Figure 7 yes Figure 5 A magnified view of a portion of point C in the middle;

[0031] Figure 8 This is a schematic diagram of the protective mechanism after removing the mounting ring and support plate;

[0032] Among them, 1 is the base, 2 is the well body, 3 is the well cover, 4 is the water inlet pipe, 5 is the water outlet pipe, 6 is the flip plate, 7 is the support plate, 8 is the exhaust pipe, 9 is the T-shaped rod, 10 is the rack, 11 is the incomplete gear, 12 is the U-shaped block, 13 is the vertical rod, 14 is the air tank, 15 is the valve body, 16 is the ball valve, 17 is the mounting ring, 18 is the circular ring plate, 19 is the inclined groove, 20 is the L-shaped rod, 21 is the trapezoidal block, 22 is the fan, 23 is the control box, 24 is the start button, 25 is the arc-shaped baffle, 26 is the filter screen, 27 is the protective cover, 28 is the connecting rod, 29 is the guide rod, 30 is the spring, 31 is the slider, 32 is the climbing frame, 33 is the U-shaped rod, 34 is the airbag, 35 is the extension rod, 36 is the control cabinet, 37 is the alarm, and 38 is the rotating shaft. Detailed Implementation

[0033] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0034] like Figure 1 As shown in Figure 8, this invention provides a water supply, drainage, and fire protection inspection well, including a base 1. A well body 2 is fixedly mounted on the upper end of the base 1. An inlet pipe 4 and an outlet pipe 5 are respectively provided at both ends of the base 1, and both the inlet pipe 4 and the outlet pipe 5 are connected to the interior of the well body 2. An exhaust pipe 8 is provided on the side wall of the well body 2, and a ventilation mechanism is provided inside the exhaust pipe 8. The ventilation mechanism includes a fan 22 and an arc-shaped baffle 25. The fan 22 is located at the outlet end of the exhaust pipe 8, and the arc-shaped baffle 25 is rotatably located at the inlet end of the exhaust pipe 8. A protective mechanism is provided inside the shaft body 2. The protective mechanism includes a flip plate 6, an airbag 34, and a support plate 7. Two symmetrical flip plates 6 are rotatably arranged on the upper side inside the shaft body 2. Two airbags 34 are symmetrically arranged in the middle of the inner side of the shaft body 2. A ring of support plates 7 is rotatably arranged on the lower side inside the shaft body 2. The flip plates 6, airbags 34, support plates 7, and blowers 22 are connected by a linkage component. When the flip plates 6 rotate downward, the linkage component controls the airbags 34 to inflate, the support plates 7 to rotate, and the blowers 22 to turn on.

[0035] The well body 2 is a cylindrical structure with openings at both the top and bottom. A detachable well cover 3 is provided at the upper opening of the well body 2. The exhaust pipe 8 is located on the left side of the well body 2. The air inlet end of the exhaust pipe 8 is the connection point between the exhaust pipe 8 and the well body 2. The connection point between the exhaust pipe 8 and the well body 2 is located below a ring of support plates 7.

[0036] The flipping plate 6 is a horizontally arranged square plate structure, with two flipping plates 6 maintaining left-right symmetry. The ends of the two flipping plates 6 that are furthest from each other are rotatably connected to the inner wall of the well body 2. Below each end of the two flipping plates 6 that are furthest from each other, two vertical guide rods 29 are provided, with the two guide rods 29 on the same side maintaining front-back symmetry, and the guide rods 29 are fixedly connected to the inner wall of the well body 2. A spring 30 is sleeved on the outside of each guide rod 29, with the lower end of the spring 30 fixedly connected to the lower end of the guide rod 29. A slider 31 is slidably sleeved on the outside of each guide rod 29, with the slider 31 located above the spring 30, and the lower end of the slider 31 contacting the upper end of the spring 30. A connecting rod 28 is hinged to the outside of each slider 31, with the end of the connecting rod 28 furthest from the slider 31 hinged to the lower end face of the flipping plate 6 on the same side, and the two connecting rods 28 at the lower end of the same flipping plate 6 maintaining front-back symmetry.

[0037] When the flip plate 6 is not subjected to external force, the slider 31 is in its initial position under the support of the spring 30. The slider 31 supports the flip plate 6 through the connecting rod 28, thus keeping the flip plate 6 in a horizontal state. When the flip plate 6 is subjected to a downward force, it begins to rotate downward. The downward rotating flip plate 6 drives the slider 31 to slide downward along the guide rod 29 through the connecting rod 28, thereby compressing the spring 30. When the downward force applied to the flip plate 6 disappears, under the action of the spring 30's rebound force, the slider 31 begins to slide upward along the guide rod 29 until it returns to its initial position, so that the flip plate 6 returns to a horizontal state. When the flip plate 6 is subjected to an upward force, it begins to rotate upward. The upward rotating flip plate 6 drives the slider 31 to slide upward along the guide rod 29 through the connecting rod 28, so that the slider 31 gradually disengages from the spring 30. When the upward force applied to the flip plate 6 disappears, the flip plate 6 begins to rotate downward under the action of gravity until it returns to a horizontal state. The downward rotating flip plate 6 also drives the slider 31 to slide downward along the guide rod 29 through the connecting rod 28 until the slider 31 returns to its initial position.

[0038] Two symmetrical air tanks 14 are fixedly installed at the middle height of the inner wall of the well body 2. Each air tank 14 has an outlet connected to an air bladder 34 on the same side via an outlet pipe. The air bladder 34, when inflated, has a semi-circular structure. A switching valve is installed on each outlet pipe. The switching valve includes a valve body 15 and a ball valve 16. The ball valve 16 is rotatably mounted inside the valve body 15, and a sealing gasket is provided between the ball valve 16 and the valve body 15. The ball valve 16 has a connecting hole. When the connecting hole on the ball valve 16 is rotated to a state where it does not coincide with the outlet pipe, the air tank 14 and the air bladder 34 are isolated from each other, and the compressed air inside the air tank 14 cannot enter the air bladder 34, leaving the air bladder 34 deflated. When the connecting hole on the ball valve 16 is rotated to a state where it coincides with the outlet pipe, the air tank 14 and the air bladder 34 are connected, and the compressed air inside the air tank 14 can enter the air bladder 34, causing the air bladder 34 to inflate. The compressed air stored inside the air tank 14 is the amount that fills one air bladder 34.

[0039] An installation ring 17 is fixedly installed on the inner wall of the well body 2. The installation ring 17 is a horizontally arranged circular ring structure. A ring of support plates 7 is rotatably arranged inside the installation ring 17. One end of the support plate 7 is rotatably connected to the inner wall of the installation ring 17. The hinge axis between the support plate 7 and the installation ring 17 remains vertical.

[0040] The linkage assembly includes a T-shaped rod 9, a vertical rod 13, a rack 10, a U-shaped block 12, an incomplete gear 11, a circular ring plate 18, an L-shaped rod 20, and a trapezoidal block 21.

[0041] A U-shaped block 12 is fixedly installed at the middle of the two rotating plates 6 at their opposite ends, with the U-shaped opening of the U-shaped block 12 facing away from the rotating plate 6. A T-shaped rod 9 is slidably installed inside each U-shaped block 12. A vertical rod 13 is rotatably installed at the lower end of the T-shaped rod 9 and slides vertically on the inner wall of the well body 2. A vertical rack 10 is fixed at the lower end of the vertical rod 13, and an L-shaped rod 20 is fixed at the lower end of the rack 10. The L-shaped rod 20 includes a vertical rod and a horizontal rod. The horizontal rod extends radially along the well body 2, and the lower end of the vertical rod is fixedly connected to the outer end of the horizontal rod.

[0042] A protruding rod is rotatably mounted on the valve body 15 of each switching valve. The inner end of the protruding rod is fixedly connected to the ball valve 16, and an incomplete gear 11 is fixedly mounted on the outer end of the protruding rod. The effective tooth segment of the incomplete gear 11 corresponds to a central angle of 90 degrees. The incomplete gear 11 is in a preliminary meshing state with the rack 10 on the same side.

[0043] A circular annular plate 18 is rotatably disposed inside the mounting ring 17. The circular annular plate 18 is a cylindrical structure with openings at both the top and bottom. The axis of the circular annular plate 18 coincides with the axis of the mounting ring 17, and the circular annular plate 18 rotates around the axis of the mounting ring 17. A circular array of placement grooves is provided on the side wall of the circular annular plate 18, with each groove corresponding to a support plate 7. The end of the support plate 7 away from the inner wall of the mounting ring 17 extends into the inner side of the circular annular plate 18 through the corresponding placement groove. Two inclined grooves 19 are provided on the circular annular plate 18, symmetrically arranged with respect to the axis of the circular annular plate 18. The height of one end of the inclined groove 19 is higher than the height of the other end. Two horizontal L-shaped rods 20 slide inward from the outside of the circular annular plate 18 and are inserted into the two inclined grooves 19.

[0044] A trapezoidal block 21 is fixedly installed at the lower end of the L-shaped rod 20 on the left side. A contact slope is provided on the upper side of the end of the trapezoidal block 21 away from the axis of the shaft body 2, with the upper end of the contact slope located on the side close to the axis of the shaft body 2. A control box 23 is also fixedly installed inside the shaft body 2, and the control box 23 is electrically connected to the blower 22. The control box 23 is located above the connection between the exhaust pipe 8 and the shaft body 2. A start button 24 is provided on the inner side of the control box 23, located above the contact slope at the upper end of the trapezoidal block 21. The control box 23 is electrically connected to the start button 24. When the start button 24 is pressed, the control box 23 controls the blower 22 to start rotating; when the start button 24 is released, the control box 23 controls the blower 22 to stop rotating.

[0045] Two symmetrical U-shaped rods 33 are rotatably installed on the inner wall of the well body 2. The U-shaped rods 33 are located between the airbag 34 and the flip plate 6. Two vertical rods 13 are slidably inserted into the two U-shaped rods 33 respectively. A handle is fixedly installed at one end of the outer side of each U-shaped rod 33. Two symmetrical extension rods 35 are fixedly installed on each vertical rod 13. The two extension rods 35 are horizontally arranged along the front-back direction and are located below the U-shaped rods 33.

[0046] A row of vertically arranged climbing frames 32 is also installed on the inner wall of the shaft body 2.

[0047] The ventilation mechanism also includes a filter screen 26 and a protective cover 27. The filter screen 26 is fixedly installed inside the upper outlet of the exhaust pipe 8, and the protective cover 27 is fixedly installed outside the upper outlet of the exhaust pipe 8.

[0048] Two arc-shaped baffles 25 are rotatably installed at the connection between the exhaust pipe 8 and the shaft body 2. The two arc-shaped baffles 25 are semi-circular plate structures. The ends of the two arc-shaped baffles 25 that are close to each other are rotatably connected to the air inlet end of the exhaust pipe 8 via the same rotating shaft 38. The rotating shaft 38 remains inclined, with its upper end tilted towards one side of the axis of the shaft body 2. Because the rotating shaft 38 of the two arc-shaped baffles 25 remains inclined, when the fan 22 is not running, the two arc-shaped baffles 25 are not subjected to external force and, under their own weight, fit against the air inlet end of the exhaust pipe 8, keeping the air inlet end of the exhaust pipe 8 in a closed state. When the fan is running, a negative pressure is generated inside the exhaust pipe 8, and the two arc-shaped baffles 25 are subjected to air pressure and rotate against gravity, keeping the air inlet end of the exhaust pipe 8 in an open state.

[0049] A control cabinet 36 and an alarm 37 are also fixedly installed on the outside of the exhaust end of the exhaust pipe 8. The control cabinet 36 is electrically connected to the control box 23 and the alarm 37.

[0050] The working principle of this invention is as follows:

[0051] When the fire inspection shaft is in its normal state, the two flip plates 6 are in a horizontal state, and the U-shaped blocks 12 on the two flip plates 6 are in contact with the T-shaped rods 9. The T-shaped rods 9, vertical rods 13, racks 10, L-shaped rods 20, and trapezoidal blocks 21 are all at their initial heights. The switching valve is in the closed state, and the airbag 34 is in a deflated state. The end of the ring support plate 7 away from the inner wall of the mounting ring 17 is close to the inner wall of the ring plate 18, so that the middle area of ​​the ring plate 18 remains unobstructed vertically. The contact slope at the upper end of the trapezoidal block 21 is disengaged from the start button 24, the fan 22 is in the closed state, and the two arc-shaped baffles 25 are also in the closed state.

[0052] When the manhole cover 3 is damaged or displaced due to vehicle traffic or environmental erosion, pedestrians may accidentally step into the gap and fall into the manhole body 2. A falling pedestrian will first come into contact with the two adjacent ends of the flip plates 6. Under the pedestrian's weight, the adjacent ends of the two flip plates 6 experience a downward force, causing them to rotate downwards. The downward-rotating flip plates 6, through the connecting rod 28, drive the slider 31 to slide downwards along the guide rod 29, thereby compressing the spring 30. The compressed spring 30 provides the power for the subsequent reset of the flip plates 6.

[0053] When the two flip plates 6 rotate downwards at their closest points, the U-shaped blocks 12 on the two flip plates 6 rotate upwards around the rotation axis of the flip plates 6. The two U-shaped blocks 12 drive the two T-shaped rods 9 to slide upwards. The two T-shaped rods 9 drive the two vertical rods 13, the two racks 10, and the two L-shaped rods 20 to slide upwards simultaneously. At the same time, the trapezoidal block 21 on the left also slides upwards along with the L-shaped rod 20 on the left. The two vertical rods 13 drive the two sets of extension rods 35 to slide upwards, and the two sets of extension rods 35 drive the two U-shaped rods 33 to rotate upwards.

[0054] The upward sliding rack 10 drives the meshing incomplete gear 11 to rotate 90 degrees. The incomplete gear 11 drives the ball valve 16 to rotate 90 degrees through the convex rod, so that the connecting hole on the ball valve 16 corresponds to the air outlet pipe. The switching valve switches from the closed state to the open state. The air tank 14 is connected to the airbag 34. The compressed air inside the air tank 14 can enter the airbag 34, causing the airbag 34 to expand rapidly. After expansion, the two airbags 34 fill the interior of the well body 2, forming a soft buffer layer with a certain load-bearing capacity, providing the first impact protection for falling pedestrians.

[0055] The horizontal bar of the upward-sliding L-shaped rod 20 slides inside the inclined groove 19 on the annular plate 18, sliding from one end of the inclined groove 19 to the other. Due to the height difference between the two ends of the inclined groove 19, the annular plate 18 rotates inside the mounting ring 17. The rotating annular plate 18 pushes a ring of support plates 7 to rotate, so that the end of each support plate 7 away from the inner wall of the mounting ring 17 rotates towards the axis of the well body 2. After rotation, the ring of support plates 7 is in a converged state, forming a circular support frame. The support frame supports the two inflated airbags 34, jointly bearing the body weight of the falling pedestrian and preventing the pedestrian from continuing to fall. At the same time, the cushioning effect of the airbags 34 can greatly reduce the impact force when the support plates 7 are supported, reducing the risk of pedestrian injury.

[0056] After sliding upwards, the trapezoidal block 21 is level with the control box 23. The contact slope on the trapezoidal block 21 gradually contacts the start button 24 and squeezes the start button 24, causing the fan 22 to start running. The running fan 22 creates a negative pressure environment inside the exhaust pipe 8, causing the two arc-shaped baffles 25 inside the air inlet of the exhaust pipe 8 to start rotating against their own weight. In this way, harmful gases such as methane and hydrogen sulfide generated at the bottom of the well body 2 due to pipe leakage and sewage accumulation are quickly drawn into the exhaust pipe 8, filtered by the filter screen 26 at the air outlet, and discharged to the outside, preventing pedestrians from being injured by inhaling harmful gases. The protective cover 27 above the air outlet of the exhaust pipe 8 can prevent rainwater and debris from entering the exhaust pipe 8, ensuring ventilation efficiency.

[0057] As the fan 22 starts, the control box 23 transmits the signal to the control cabinet 36 fixed on the outer wall of the exhaust pipe 8 via the line. The alarm 37 on one side of the control cabinet 36 immediately emits an audible and visual alarm signal to remind pedestrians and vehicles in the vicinity to pay attention to safety. At the same time, the control cabinet 36 transmits the fall event information to the municipal rescue department through the built-in communication module to provide positioning and early warning support for rapid rescue.

[0058] Once the support plate 7 converges to form a support surface and the airbag 34 completes its cushioning function, the falling pedestrian can be in a relatively safe state. At this time, the pedestrian can use the climbing frame 32, which is fixed at equal intervals on the inner wall of the shaft body 2, to gradually climb to the top of the shaft and achieve self-rescue. If the pedestrian cannot climb on their own, they can wait for rescue on the support surface until the rescuers arrive.

[0059] After the rescue work is completed, the operator will reset the system to ensure that the wellbore returns to normal protection. Specifically, the operator will first rotate the flip plate 6 upward to open it. During this process, the slider 31 will move upward along the guide rod 29 via the connecting rod 28, and the spring 30 will not be compressed. Then, the operator will rotate the T-shaped rod 9 90 degrees around its own axis so that the direction of the T-shaped rod 9 is consistent with the opening direction of the U-shaped block 12, thereby releasing the limiting relationship between the T-shaped rod 9 and the U-shaped block 12.

[0060] Next, the operator holds the handle at the end of the U-shaped rod 33 and rotates the U-shaped rod 33 downward. The inner wall of the U-shaped rod 33 presses against the extension rod 35 on the vertical rod 13, causing the vertical rod 13 to slide downward along the sliding trajectory and reset. The T-shaped rod 9 at the top of the vertical rod 13 and the rack 10 and L-shaped rod 20 at the bottom move downward synchronously.

[0061] When the L-shaped rod 20 moves down, the horizontal bar of the L-shaped rod 20 slides along the inner wall of the inclined groove 19 of the annular plate 18, and the reverse pressure on the inclined groove 19 causes the annular plate 18 to rotate around the axis of the mounting ring 17, and drives the support plate 7 in the placement groove inside the annular plate 18 to rotate and reset. The operator then opens the exhaust valve of the airbag 34 to release the internal gas, replaces the used air tank 14 and airbag 34, and adjusts the meshing position of the incomplete gear 11 and the rack 10 to ensure precise linkage for the next use.

[0062] During the downward movement of the L-shaped rod 20, the trapezoidal block 21 is driven to move downward synchronously through the connecting rod. The trapezoidal block 21 disengages from the start button 24 on the control box 23, the fan 22 stops running, and the arc-shaped baffle 25 at the air inlet of the exhaust pipe 8 closes under its own gravity to prevent external debris from entering the exhaust pipe 8. The alarm 37 is turned off by the manual reset button on the control cabinet 36. Then, the T-shaped rod 9 is rotated in the opposite direction to engage with the U-shaped block 12, and the system returns to the initial standby state.

[0063] When routine maintenance is performed on the inlet pipe 4, outlet pipe 5, and the interior of the well body 2, the protective mechanism will not be activated. The specific operating procedure is as follows: The operator starts the fan 22 through the manual control key on the control cabinet 36. The operation of the fan 22 creates a negative pressure at the air inlet end of the exhaust pipe 8, and the arc-shaped baffle 25 opens, forcibly exhausting the harmful gases accumulated at the bottom of the well body 2 for 5-10 minutes to ensure that the air quality inside the well meets the standards. After the exhaust is completed, the operator removes the well cover 3 and rotates the flip plate 6 upward. At this time, the U-shaped blocks 12 at both ends of the flip plate 6 gradually separate from the T-shaped rod 9. The T-shaped rod 9 is not subject to upward thrust, and the protective mechanism remains silent. The operator enters the bottom along the climbing frame 32 on the inner wall of the well body 2. After completing the maintenance work, the operator climbs out of the well in the reverse order, turns off the fan 22, resets the flip plate 6, and covers the well cover 3 to complete the maintenance process.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A water supply, drainage, and fire protection inspection well, characterized in that: The well body (2) is fixedly installed on the upper end of the base (1). A water inlet pipe (4) and a water outlet pipe (5) are respectively installed at both ends of the base (1). The water inlet pipe (4) and the water outlet pipe (5) are connected to the inside of the well body (2). An exhaust pipe (8) is installed on the side wall of the well body (2). A ventilation mechanism is installed inside the exhaust pipe (8). The ventilation mechanism includes a fan (22) and an arc-shaped baffle (25). The fan (22) is installed at the air outlet end of the exhaust pipe (8), and the arc-shaped baffle (25) is rotatably installed at the air inlet end of the exhaust pipe (8). Inside the well body (2) The protective mechanism includes a flip plate (6), an airbag (34), and a support plate (7). Two symmetrical flip plates (6) are rotatably arranged on the upper side inside the shaft body (2). Two airbags (34) are symmetrically arranged in the middle of the inner side of the shaft body (2). A ring of support plates (7) is rotatably arranged on the lower side inside the shaft body (2). The flip plate (6), airbag (34), support plate (7), and fan (22) are connected by a linkage component. When the flip plate (6) rotates downward, the linkage component controls the airbag (34) to expand, the support plate (7) to rotate, and the fan (22) to start. Two symmetrical gas storage tanks (14) are fixedly installed at the middle height of the inner wall of the well body (2). Each gas storage tank (14) is connected to the gas bag (34) on the same side through a gas outlet pipe. A switching valve is installed on each gas outlet pipe. The switching valve includes a valve body (15) and a ball valve (16). The ball valve (16) is rotatably installed inside the valve body (15). A connecting hole is provided on the ball valve (16). An installation ring (17) is fixedly installed on the inner wall of the well body (2), and a support plate (7) is rotatably installed inside the installation ring (17). One end of the support plate (7) is rotatably connected to the inner wall of the installation ring (17). The linkage assembly includes a T-shaped rod (9), a vertical rod (13), a rack (10), a U-shaped block (12), an incomplete gear (11), a ring plate (18), and an L-shaped rod (20). A U-shaped block (12) is fixedly installed at the middle of the two flip plates (6) at their opposite ends. A T-shaped rod (9) is slidably installed inside each U-shaped block (12). A vertical rod (13) is rotatably installed at the lower end of the T-shaped rod (9). The vertical rod (13) is slidably installed on the inner wall of the shaft body (2) along the vertical direction. A vertical rack (10) is fixed at the lower end of the vertical rod (13). An L-shaped rod (20) is fixed at the lower end of the rack (10). The L-shaped rod (20) includes a vertical rod and a horizontal rod. The horizontal rod extends radially along the shaft body (2). The lower end of the vertical rod is connected to the horizontal rod. One end of the outer side is fixedly connected; a protruding rod is rotatably provided on the valve body (15) of each switching valve, the inner end of the protruding rod is fixedly connected to the ball valve (16), and an incomplete gear (11) is fixedly provided on the outer end of the protruding rod. The incomplete gear (11) is in a preliminary meshing state with the rack (10) on the same side; a circular ring plate (18) is rotatably provided inside the mounting ring (17), and a ring groove is provided on the side wall of the circular ring plate (18). The end of the support plate (7) away from the inner wall of the mounting ring (17) passes through the corresponding placement groove and extends into the inner side of the circular ring plate (18); two inclined grooves (19) are provided on the circular ring plate (18), and the height of one end of the inclined groove (19) is higher than the height of the other end of the inclined groove (19); the horizontal rods of the two L-shaped rods (20) are slidably inserted into the two inclined grooves (19) respectively. The linkage component also includes a trapezoidal block (21); a trapezoidal block (21) is fixedly installed at the lower end of one of the L-shaped rods (20), and a contact slope is provided on the trapezoidal block (21). A control box (23) is also fixedly installed inside the shaft body (2), and the control box (23) is electrically connected to the fan (22); a start button (24) is provided on the inner side of the control box (23), and the start button (24) is located above the contact slope at the upper end of the trapezoidal block (21). The control box (23) is electrically connected to the start button (24).

2. The water supply and drainage fire-fighting inspection well shaft according to claim 1, characterized in that: Two rotating plates (6) are rotatably connected to the inner wall of the shaft body (2) at their opposite ends; two vertical guide rods (29) are provided below each of the opposite ends of the two rotating plates (6), and the guide rods (29) are fixedly connected to the inner wall of the shaft body (2); a spring (30) is sleeved on the outside of each guide rod (29), and the lower end of the spring (30) is fixedly connected to the lower end of the guide rod (29); a slider (31) is slidably sleeved on the outside of each guide rod (29), and the lower end of the slider (31) is in contact with the upper end of the spring (30); a connecting rod (28) is hinged on the outside of each slider (31), and the end of the connecting rod (28) away from the slider (31) is hinged to the lower end face of the rotating plate (6) on the same side.

3. The water supply and drainage fire-fighting inspection well shaft according to claim 1, characterized in that: A control cabinet (36) and an alarm (37) are fixedly installed on the outside of the exhaust end of the exhaust pipe (8). The control cabinet (36) is electrically connected to the control box (23) and the alarm (37).

4. The water supply and drainage fire-fighting inspection well shaft according to claim 1, characterized in that: Two symmetrical U-shaped rods (33) are also rotatably installed on the inner wall of the shaft body (2). Two vertical rods (13) are slidably inserted into the two U-shaped rods (33). A handle is fixedly installed at one end of the outer side of each U-shaped rod (33). Two extension rods (35) are fixedly installed on each vertical rod (13). The extension rods (35) are located on the lower side of the U-shaped rod (33).

5. The water supply and drainage fire-fighting inspection well shaft according to claim 1, characterized in that: A detachable manhole cover (3) is provided at the upper opening of the manhole body (2), and a row of climbing frames (32) is provided on the inner wall of the manhole body (2).

6. The water supply and drainage fire-fighting inspection well shaft according to claim 1, characterized in that: The two arc-shaped baffles (25) are connected to the intake end of the exhaust pipe (8) by the same pivot (38) at one end, and the pivot (38) is kept tilted.

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