Split type vertical air shaft explosion door
By designing the split vertical air shaft explosion-proof door, the problem that traditional explosion-proof doors cannot be automatically closed after high-pressure airflow is solved. The split structure and buffer device are adopted to realize the stable operation of the fan and the function of quickly protecting the ventilation system.
Patent Information
- Application Number
- CN202420979569.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The explosion-proof door of the traditional vertical air shaft cannot be closed automatically after high-pressure airflow, which volatilizes and leaks the sealing oil. It is easy to be blown away in bad weather, the switching process is unstable, and it is easy to be blown away when coal dust and gas explodes, resulting in the ventilation system. Unable to recover in time.
A split vertical air shaft explosion-proof door is designed, including door panels, frame beams, ring beams, compression devices, directional redirection devices, wire ropes, heavy hammer devices, reset devices and electronic control systems, using split structures and bolts. Equipped with buffering device and reset device to ensure that the door panel can be opened and closed quickly under negative pressure and airflow impact, and ensure the normal operation of the ventilation system.
It realizes the sealing of the fan in the air shaft during normal operation, automatically turns on after shutdown, quickly protects ventilation facilities during explosion, and effectively closes in the reverse air condition to ensure the safety and rapid recovery of the ventilation system.
Smart Images
Figure CN222208014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof doors, in particular to a split-type vertical air shaft explosion-proof door. Background Art
[0002] The explosion-proof door of the wind shaft is a special sealing manhole cover installed on the exhaust manhole of the main ventilator. It is a protective device designed to prevent ventilation accidents caused by the pressure difference between the above-ground and underground areas. In mines using negative pressure ventilation, the explosion-proof door is freely placed on the locking plate at the top of the wind shaft mouth, facing the wellhead, covering the entire section of the wind shaft.
[0003] As an important part of the mine ventilation system, explosion-proof doors are blown away when coal dust or gas explodes underground, or are blown away after being opened due to severe weather or power outages. Since the explosion-proof doors cannot be reset in time, the normal operation of the ventilation system cannot be restored in time, which will increase casualties and make it impossible to quickly resume production underground. Traditional vertical shaft explosion-proof doors have the following problems during use:
[0004] (1) The explosion-proof door uses oil seals. A large amount of sealing oil will condense on the fan blades after evaporation, which will have an adverse effect on the fan. In addition, there is a risk of sealing oil leakage, which will pollute the environment and increase the air leakage rate;
[0005] (2) When there is a power outage due to severe weather such as strong winds, lightning, etc., the explosion-proof door will open due to the stop of the fan. The explosion-proof door has no fixed point and there is a risk of being blown away or blown off;
[0006] (3) During the process of opening or closing the door, due to the influence of external wind force, wire rope friction, explosion-proof door processing quality and other factors, the rising and falling of the explosion-proof door cannot be guaranteed to be smooth and synchronous, and it is easy to get stuck and skew;
[0007] (4) When encountering coal dust and gas explosion conditions, there is a risk of explosion-proof doors being blown away. Since the explosion-proof doors cannot be reset in time, the normal operation of the ventilation system cannot be restored in time, which will aggravate casualties and the inability to quickly resume production underground. Utility Model Content
[0008] The utility model provides a split type vertical air shaft explosion-proof door, aiming to solve the problem in the related art that the explosion-proof door cannot be automatically closed after passing through a high-pressure airflow.
[0009] The split vertical air shaft explosion-proof door comprises a door panel, a frame beam, a ring beam, a clamping device, a redirecting device, a steel wire rope, a weight device, a resetting device and an electric control system. A locking plate is arranged at the air shaft opening, the frame beam and the ring beam are fixedly connected, the frame beam and the ring beam are fixedly arranged on the locking plate, the door panel is rotatably arranged on the ring beam, one end of the steel wire rope is connected to the door panel, the steel wire rope is connected to the weight device after passing around the redirecting device, and the resetting device is connected to the weight device through the steel wire rope.
[0010] Preferably, a locking plate is provided at the air shaft opening, the frame beam and the ring beam are fixedly connected, the frame beam and the ring beam are fixedly set on the locking plate, the door panel is rotatably set on the ring beam, one end of the wire rope is connected to the door panel, the wire rope is connected to the weight device after passing around the redirecting device, and the reset device is connected to the weight device through the wire rope.
[0011] Preferably, the frame beam and the ring beam both adopt a split structure, and both are connected to the locking plate by bolts to facilitate the installation of both at the air shaft mouth and facilitate subsequent replacement.
[0012] Preferably, the redirecting device includes fixed rods fixedly arranged at the air shaft opening, the number of the fixed rods is the same as the number of the door panels and is arranged one-to-one with the door panels, and a fixed pulley is fixedly arranged on the top of each fixed rod.
[0013] Preferably, the clamping device is installed on the upper part of the frame beam, the clamping device is connected to the electric control system, and the clamping device is installed outside the frame beam to facilitate subsequent maintenance.
[0014] Preferably, a hinge support is installed between the door panel and the ring beam, and the door panel and the ring beam are connected by the hinge support to ensure the stability of the connection between the door panel and the ring beam.
[0015] Preferably, a buffer device is fixedly provided on the redirecting device, and the buffer device is arranged toward the direction of the door panel.
[0016] Preferably, the buffer device comprises a sleeve fixedly arranged on the redirecting device, a movable rod is slidably arranged in the sleeve, and a spring is installed between the movable rod and the sleeve.
[0017] Preferably, the resetting device can not only complete the resetting function of the weight device, but also play a damping and buffering function during the descent of the weight device.
[0018] By adopting the above technical solution, the beneficial effects of the utility model are as follows:
[0019] When the fan in the air shaft is operating normally, the door panel, under the action of negative pressure, is tightly attached to the upper part of the frame beam, forming an effectively enclosed environment, and the clamping device is in the open state. When the fan stops running, the door panel loses the negative pressure and will gradually open under the action of the weight device to ensure normal ventilation of the air shaft; when an explosion occurs underground, the door panel loses the negative pressure and, at the same time, opens quickly under the impact of the airflow, thereby effectively protecting the fan facilities from damage; in the reverse wind state, the clamping device is in the closed state, exerting additional pressure on the door body to ensure effective closure in the reverse wind state; when the door body needs to be reset and closed from the open state, the reset device lifts the weight device, and the door panel gradually closes under the action of its own gravity and is tightly attached to the upper part of the frame beam, restoring the ventilation system of the mine. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the door closing structure of the utility model.
[0021] Figure 2 It is a structural schematic diagram of the door body of the utility model in an open state.
[0022] Figure 3 It is a schematic diagram of the top structure of the utility model.
[0023] Reference numerals:
[0024] 1. Door panel; 2. Frame beam; 3. Ring beam; 4. Clamping device; 5. Redirecting device; 6. Buffer device; 7. Hinge support; 8. Wire rope; 9. Heavy hammer device; 10. Resetting device. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.
[0026] like Figure 1-Figure 3 As shown, the split vertical shaft explosion-proof door includes a door panel 1, a frame beam 2, a ring beam 3, a clamping device 4, a redirecting device 5, a wire rope 8, a heavy hammer device 9, a resetting device 10 and an electric control system.
[0027] A locking plate is provided at the air shaft opening, the frame beam 2 and the ring beam 3 are fixedly connected, the frame beam 2 and the ring beam 3 are both fixedly set on the locking plate, the door panel 1 is rotatably set on the ring beam 3, one end of the wire rope 8 is connected to the door panel 1, the wire rope 8 is connected to the weight device 9 after passing around the redirecting device 5, and the reset device 10 is connected to the weight device 9 through the wire rope 8.
[0028] During the specific use of the utility model, when the fan in the air shaft operates normally, the door panel 1 is pressed against the upper part of the frame beam 2 under the action of negative pressure to form an effectively enclosed environment, and the clamping device 4 is in an open state. When the fan stops running, the door panel 1 loses the negative pressure and will gradually open under the action of the weight device 9 to ensure normal ventilation of the air shaft; when an explosion occurs underground, the door panel 1 loses the negative pressure and will open quickly under the impact of the airflow, thereby effectively protecting the fan facilities from damage; in the reverse wind state, the clamping device 4 is in a closed state, applying additional pressure to the door body to ensure effective closure in the reverse wind state; when the door body needs to be reset and closed from the open state, the reset device 10 lifts the weight device 9, and the door panel 1 gradually closes under the action of its own gravity and presses against the upper part of the frame beam 2 to restore the ventilation system of the mine.
[0029] Preferably, the door panel 1 comprises four hexagonal steel plates, and a sealing ring is installed on a side of the door panel 1 close to the ring beam 3; when the door panel 1 is closed, the door panel 1 fits tightly against the ring beam 3 to seal the ring beam 3.
[0030] Furthermore, the frame beam 2 and the ring beam 3 both adopt a split structure, and both are connected to the locking plate by bolts to facilitate the installation of the two at the air shaft mouth and facilitate subsequent replacement.
[0031] Specifically, the redirecting device 5 includes fixed rods fixedly arranged at the air shaft opening, the number of the fixed rods is the same as the number of the door panels 1 and is arranged one-to-one with the door panels 1, and a fixed pulley is fixedly arranged on the top of each fixed rod. In the specific implementation process, one end of the wire rope 8 is connected to the door panel 1, and the other end is fixedly connected to the weight device 9 after passing around the fixed pulley.
[0032] Furthermore, a clamping device 4 is installed on the upper part of the frame beam 2, and the clamping device 4 is connected to the electronic control system. The clamping device 4 is installed on the outside of the frame beam 2 to facilitate subsequent maintenance. The clamping device 4 includes a hydraulic rod, and a shift rod in contact with the door panel 1 is installed at the movable end of the hydraulic rod. When the clamping device 4 is closed, the shift rod moves down and abuts against the door panel 1 to press the door panel 1 against the ring beam 3.
[0033] Furthermore, a hinge support 7 is installed between the door panel 1 and the ring beam 3, and the door panel 1 and the ring beam 3 are connected by the hinge support 7 to ensure the stability of the connection between the door panel 1 and the ring beam 3.
[0034] Preferably, a buffer device 6 is fixedly provided on the redirecting device 5, and the buffer device 6 is arranged in the direction of the door panel 1. When an explosion occurs in the air shaft or the air pressure inside the air shaft is high and will quickly force the door panel 1 open, the door panel 1 will hit the buffer device 6 to avoid damage to the door panel 1.
[0035] The buffer device 6 includes a sleeve fixedly mounted on the redirecting device 5, a movable rod is slidably mounted in the sleeve, a spring is installed between the movable rod and the sleeve, when the door panel 1 is opened quickly, the door panel 1 hits the movable rod to prevent the door panel 1 from being damaged.
[0036] Preferably, the resetting device 10 can not only complete the resetting function of the weight device 9, but also play a damping and buffering function during the descending process of the weight device 9.
[0037] The working principle of this utility model:
[0038] When the fan in the air shaft operates normally, the door panel 1 is pressed against the upper part of the frame beam 2 under the action of negative pressure, forming an effectively enclosed environment, and the clamping device 4 is in an open state. When the fan stops running, the door panel 1 loses the negative pressure and will gradually open under the action of the weight device 9 to ensure normal ventilation of the air shaft; when an explosion occurs underground, the door panel 1 loses the negative pressure and will open quickly under the impact of the airflow, thereby effectively protecting the fan facilities from damage; in the reverse wind state, the clamping device 4 is in a closed state, applying additional pressure to the door body to ensure effective closure in the reverse wind state; when the door body needs to be reset and closed from the open state, the reset device 10 lifts the weight device 9, and the door panel 1 gradually closes under the action of its own gravity and presses against the upper part of the frame beam 2 to restore the ventilation system of the mine.
[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. Split vertical air shaft explosion-proof door, It is characterized in that include: A door panel (1), a frame beam (2), a ring beam (3), a pressing device (4), a redirecting device (5), a steel wire rope (8), a weight device (9), a reset device (10) and an electric control system. A locking plate is arranged at the air shaft opening. The frame beam (2) and the ring beam (3) are fixedly connected. The frame beam (2) and the ring beam (3) are both fixedly arranged on the locking plate. The door panel (1) is rotatably arranged on the ring beam (3). One end of the steel wire rope (8) is connected to the door panel (1). The steel wire rope (8) is connected to the weight device (9) after passing around the redirecting device (5). The reset device (10) is connected to the weight device (9) via the steel wire rope (8).
2. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that The door panel (1) comprises four hexagonal steel plates, and a sealing ring is installed on one side of the door panel (1) close to the ring beam (3).
3. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that The frame beam (2) and the ring beam (3) both adopt a split structure, and both are connected to the locking plate by bolts, so as to facilitate the installation of the two at the air shaft opening and facilitate subsequent replacement.
4. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that The redirecting device (5) comprises a fixing rod fixedly arranged at the air shaft opening, the number of the fixing rods being the same as the number of the door panels (1) and being arranged in one-to-one correspondence with the door panels (1), and a fixed pulley being fixedly arranged at the top of each fixing rod.
5. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that The clamping device (4) is installed on the upper part of the frame beam (2), the clamping device (4) is connected to the electric control system, and the clamping device (4) is installed outside the frame beam (2) to facilitate subsequent maintenance.
6. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that The clamping device (4) comprises a hydraulic rod, the movable end of which is provided with a stop rod in contact with the door panel (1); when the clamping device (4) is closed, the stop rod moves downward to abut against the door panel (1) to clamp the door panel (1) against the ring beam (3).
7. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that A hinge support (7) is installed between the door panel (1) and the ring beam (3), and the door panel (1) and the ring beam (3) are connected via the hinge support (7), thereby ensuring the stability of the connection between the door panel (1) and the ring beam (3).
8. The split vertical air shaft explosion-proof door according to claim 1, It is characterized in that A buffer device (6) is fixedly arranged on the redirection device (5), and the buffer device (6) is arranged in the direction of the door panel (1).
9. The split vertical air shaft explosion-proof door according to claim 8, It is characterized in that The buffer device (6) comprises a sleeve fixedly arranged on the redirecting device (5), a movable rod slidably arranged in the sleeve, and a spring is installed between the movable rod and the sleeve.