Opening power assisting device applied to mandoor of ventilation gallery of large hydropower station

Abstract

An opening power assisting device applied to a mandoor of a ventilation corridor of a large hydropower station comprises a support installed on the mandoor, a supporting rod is installed on the support in a sliding mode, a rotatable structure is rotatably installed on the supporting rod, and a bolt capable of falling, a sliding channel for the bolt to fall and a sliding groove are arranged on the supporting rod at the other end of the rotatable structure. The sliding channel is used for sliding of the falling plug pin, the sliding groove is used for locking of the falling plug pin, the compressible structure is installed between the support and the supporting rod, the compressible structure is installed on the support in a sliding mode, the rotatable structure is installed in the compressible structure in a rotating mode and used for locking or unlocking the supporting rod, and a flat pressing opening is further formed in the support. When the supporting rod is unlocked and pulled out, the flat pressing opening balances internal and external air pressure, and door opening resistance is reduced; the door opening device is exquisite in design, simple in structure, safe and reliable, solves the problems that an existing ventilation corridor access door is difficult to open, and hands are prone to being pinched, achieves easy opening of the access door, does not pinch the hands, and has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment of hydropower stations, in particular to an opening assisting device applied to an entrance door of a ventilation gallery of a large hydropower station. Background Art

[0002] In a hydropower station, the ventilation system is a key subsystem to ensure the normal operation of the equipment, of which the air duct corridor is an important component. In order to facilitate the maintenance and overhaul of the air duct corridor, an entry door is usually set. However, due to the large pressure difference on both sides of the air duct corridor, it is difficult to open the entry door, especially for female employees, who find it difficult to open it alone. In addition, due to the high internal wind pressure, the entry door after opening has the potential safety hazard of closing quickly and pinching hands.

[0003] Most existing entry doors are iron doors that are opened manually without a special power-assisting device. This design not only makes operation inconvenient, but also poses a safety hazard. Therefore, developing a device that can easily open and lock the entry door is of great significance to improving the safety and work efficiency of the hydropower station.

[0004] For example, CN103806928B discloses an assisted opening device for a high negative pressure area damper and a manufacturing method thereof, wherein the assisted opening device for a high negative pressure area damper is installed on the high pressure side of the damper, and comprises an opening arm, a ring seat, and a baffle, wherein the ring seat is installed on the door leaf of the damper, and the baffle is installed on the door frame of the damper; the opening arm is a lever with an arc-shaped elbow at the front, and a pull ring is provided on the opening arm; the opening arm is hung on the ring seat through the pull ring and can be rotated around the ring seat as a lever, and the top end of the opening arm extends out of the door leaf and presses on the baffle; when the opening arm is pulled, the lever effect is used to increase the pulling force when opening the damper in the high negative pressure area; however, the device is not provided with a pressure relief port for balancing the internal and external pressures, and the entrance door after being opened is prone to rapid closure and pinching of hands due to the high internal wind pressure; the opening degree cannot be fixed, and it is inconvenient for people to enter and exit.

[0005] Therefore, we urgently need an opening assist device for the entrance door of the ventilation corridor of a large hydropower station to solve the problem that the existing entrance door of the ventilation corridor is difficult to open and the safety hazard of easily pinching hands after opening. Summary of the invention

[0006] The technical problem to be solved by the utility model is to provide an opening assisting device applied to the entrance door of the ventilation gallery of a large hydropower station, so as to solve the safety hazard problems that the entrance door of the existing ventilation gallery is difficult to open and the hand is easily pinched after opening.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: an opening assist device for an entrance door of a ventilation corridor of a large hydropower station, comprising a support installed on the entrance door, a support rod being slidably installed on the support, a rotatable structure being rotatably installed on the support rod, a drop-down latch and a sliding channel and a slidable groove for its falling are provided on the support rod at the other end of the rotatable structure, the sliding channel is used for the sliding of the drop-down latch, and the slidable groove is used for locking the drop-down latch, a clamping structure is installed between the support and the support rod, the clamping structure is slidably installed on the support, and the rotatable structure is rotatably installed in the clamping structure for locking or unlocking the support rod, and a pressure equalization port is also provided on the support, when the support rod is unlocked and pulled outwards, the pressure equalization port balances the internal and external air pressures to reduce the resistance to opening the door.

[0008] In the preferred embodiment, the support includes a base plate with a flat pressure port. When locked, the flat pressure port can be closed by a clamping structure. A number of mounting holes are provided on both sides of the base plate to fix the base plate to the entrance door. Slide grooves are also provided on both sides of the base plate, and the clamping structure can slide along the slide grooves.

[0009] In the preferred scheme, sliders are provided on both sides of the clampable structure, and the sliders are clamped and fixed in the slide grooves on both sides of the base plate and slide along the slide grooves. An internal thread is provided in the middle of the clampable structure, and an external thread is provided on the rotatable structure. The two are screwed together to connect and fix the clampable structure and the rotatable structure together to lock or unlock the support rod.

[0010] In a preferred solution, a rotatable compression seat is provided at one end of the support rod, and the compression seat is installed between the compression structure and the rotatable structure. The support rod is unlocked or locked by rotating the rotatable structure, so that the support rod rotates around the rotatable structure.

[0011] In a preferred solution, the rotatable structure head is arranged in a plum blossom shape.

[0012] In a preferred solution, after the support rod is pulled out in the unlocked state, it is rotated and then locked, and serves as a door opening force arm and handle, and assists in opening the entrance door through the lever principle.

[0013] In a preferred embodiment, a sliding channel for a drop pin is provided on the support rod, and a sliding groove is provided at the other end of the support rod. A drop pin is slidably installed in the sliding groove. The drop pin slides on the sliding channel along the sliding groove and is limited by the front and rear ends of the sliding groove.

[0014] In a preferred embodiment, the drop-down latch comprises a latch having a handle at one end thereof for manually unlocking, pushing and pulling, sliding or locking the drop-down latch; slides are provided on both sides of the bottom of the latch; the slides pass through the slidable grooves on the support rods and slide on the sliding channel, and are limited by the front and rear ends of the slidable grooves.

[0015] In a preferred embodiment, the opening assist device also includes a fixing device, which includes a bolt that fixes the support to the entry door and is installed in the mounting hole, and also includes a locking hole into which a latch can be dropped when the entry door is opened and locked.

[0016] In a preferred solution, the opening assist device further includes a fixing device for fixing the device next to an entrance door to ensure stable operation of the device.

[0017] In a preferred solution, the entrance door is provided with a threaded hole corresponding to the mounting hole, and the bolt is inserted into the threaded hole through the mounting hole to fix the support on the entrance door, and a ventilation hole is opened on the entrance door at a hole position corresponding to the flat pressure port on the support.

[0018] The utility model provides an opening assisting device for a ventilation gallery entrance door of a large hydropower station, which has the following beneficial effects:

[0019] 1. The utility model solves the problem that the existing ventilation corridor entrance door is difficult to open and the potential safety hazard of easily pinching hands after opening;

[0020] 2. The utility model reduces the resistance when the entrance door is opened by balancing the internal and external air pressures, making the operation easier;

[0021] 3. The utility model utilizes the lever principle and realizes easy opening of the entrance door through the combination of a rotatable structure and a support rod;

[0022] 4. The utility model realizes the locking of the entry door through the cooperation of the drop-down latch and the sliding channel, avoiding the problem of rapid closing and pinching of hands caused by wind pressure;

[0023] 5. The utility model can easily open and lock the entrance door, which not only improves work efficiency but also eliminates potential safety hazards. At the same time, the device has a simple structure and is easy to operate. It is suitable for the entrance doors of ventilation corridors of various large hydropower stations. It has broad application prospects and can be widely used and promoted in hydropower stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and implementation examples:

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a structural diagram of the opening assist device of the utility model (closed state);

[0027] Figure 3 This is a structural diagram of the opening assist device of the utility model (opening process);

[0028] Figure 4 This is a structural diagram of the opening assist device of the utility model (opening state);

[0029] Figure 5 This is a structural diagram of the opening assist device of the utility model (locked state);

[0030] Figure 6 It is a structural schematic diagram of the support of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the rotatable structure of the utility model;

[0032] Figure 8 It is a structural schematic diagram of the support rod of the utility model;

[0033] Fig. 9 This is a schematic diagram of the structure of the drop-down latch of the utility model;

[0034] Fig.10 It is a structural schematic diagram of the compactable structure of the utility model;

[0035] In the figure: support 1, rotatable structure 2, support rod 3, dropable latch 4, sliding channel 5, clamping structure 6, flat pressure port 7, slidable groove 8, locking hole 9, entry door 10, bottom plate 11, mounting hole 12, slide groove 13, clamping seat 31, latch 41, handle 42, slide table 43, slider 61, internal thread 62. DETAILED DESCRIPTION

[0036] like Figures 1 to 10 As shown, an opening assist device applied to an entrance door of a ventilation gallery of a large hydropower station comprises a support 1 installed on an entrance door 10, the support 1 being slidably installed with a support rod 3, a rotatable structure 2 being rotatably installed on the support rod 3, a drop-down latch 4 and a sliding channel 5 and a slidable groove 8 for its drop are provided on the support rod 3 at the other end of the rotatable structure 2, the sliding channel 5 is used for the sliding of the drop-down latch 4, the slidable groove 8 is used for locking the drop-down latch 4, a compressible structure 6 is installed between the support 1 and the support rod 3, the compressible structure 6 is slidably installed on the support 1, the rotatable structure 2 is rotatably installed in the compressible structure 6, and is used for locking or unlocking the support rod 3, and a pressure equalization port 7 is also provided on the support 1, when the support rod 3 is unlocked and pulled outwards, the pressure equalization port 7 balances the internal and external air pressures, and reduces the resistance to opening the door.

[0037] In this embodiment, the support 1 includes a base plate 11, and a flat pressure port 7 is provided on the base plate 11. When locked, the flat pressure port 7 can be closed by the clamping structure 6. A plurality of mounting holes 12 are provided on both sides of the base plate 11, and the base plate 11 and the entrance door 10 are fixed together. Slide grooves 13 are also provided on both sides of the base plate 11, and the clamping structure 6 can slide along the slide grooves.

[0038] Furthermore, sliders 61 are provided on both sides of the clamping structure 6, and the sliders 61 are clamped and fixed in the slide grooves 13 on both sides of the bottom plate 11 and slide along the slide grooves 13. An internal thread 62 is provided in the middle of the clamping structure 6, and an external thread is provided on the rotatable structure 2. The two are screwed together to connect and fix the clamping structure 6 and the rotatable structure 2 together, thereby locking or unlocking the support rod 3.

[0039] Furthermore, a clamping seat 31 of the rotatable structure 2 is provided at one end of the support rod 3, and the clamping seat 31 is installed between the clamping structure 6 and the rotatable structure 2. The support rod 3 is unlocked or locked by rotating the rotatable structure 2, so that the support rod 3 rotates around the rotatable structure 2.

[0040] Furthermore, the head of the rotatable structure 2 is arranged in a plum blossom shape.

[0041] Furthermore, after the support rod 3 is pulled out in the unlocked state, it is rotated and then locked, and serves as a door opening lever and handle, and assists in opening the entry door 10 through the lever principle.

[0042] Furthermore, a sliding channel 5 for a drop pin 4 is provided on the support rod 3, and a sliding groove 8 is also provided at the other end of the support rod 3. The drop pin 4 is slidably installed in the sliding groove 8. The drop pin 4 slides on the sliding channel 5 along the sliding groove 8 and is limited by the front and rear ends of the sliding groove 8.

[0043] Furthermore, the drop-down latch 4 includes a latch 41, one end of which is provided with a handle 42 for manually unlocking, pushing and pulling, sliding or locking the drop-down latch 4, and both sides of the bottom of the latch 41 are provided with slides 43, which pass through the slidable groove 8 on the support rod 3 and slide on the sliding channel 5, and are limited by the front and rear ends of the slidable groove 8.

[0044] Furthermore, the opening assist device also includes a fixing device, which includes a bolt that fixes the support 1 to the entry door 10 and is inserted into the mounting hole 12, and also includes a locking hole 9 into which the latch 4 can be dropped when the entry door 10 is opened and locked.

[0045] Furthermore, the entrance door 10 is provided with a threaded hole corresponding to the mounting hole 12, and the bolt passes through the mounting hole 12 and is installed into the threaded hole to fix the support 1 on the entrance door 10. The entrance door 10 is provided with an air vent at a hole position corresponding to the flat pressure port 7 on the support 1.

[0046] When the whole device is used, after the trial assembly and debugging are qualified, the bolt is inserted into the mounting hole 12 and screwed into the threaded hole on the entry door 10 to fix it to the entry door 10 of the hydropower station ventilation corridor. In the initial state, the entry door 10 is closed, the clamping structure 6 is clamped, the support rod 3 is locked, and the drop pin 7 is fixed to the front end of the slidable groove 8. At this time, the device is in Figure 2 The closed state shown;

[0047] When the entry door 10 needs to be opened, the compressible structure 6 is first rotated to the left to unlock the support rod 3, and then the support rod 3 is pulled out to the right. At this time, the equalizing port 7 is opened, the internal and external air pressures are relatively balanced, and the resistance to opening the door is reduced. At this time, the device is in Figure 3 The status shown;

[0048] Then, the compressible structure 6 is rotated to the right to lock the support rod 3. By using the lever principle, the rotatable structure 2 is used as a fulcrum and the support rod 3 is used as a lever arm, and the entry door 10 can be easily opened. Figure 4 shown.

[0049] After the entry door 10 is opened, the handle 42 of the drop-down latch 4 is held, and the drop-down latch 4 is pushed by the handle 42 to slide along the slidable groove 8 on the sliding channel 5 until the drop-down latch 4 is inserted into the locking hole 9 that has been opened, thereby locking the entry door 10 to prevent the problem of rapid closing and pinching of hands caused by wind pressure. Figure 5 shown.

[0050] The opening assist device of the utility model can easily open and lock the entrance door 10, which not only improves work efficiency but also eliminates safety hazards. At the same time, the device has a simple structure and is easy to operate, and is suitable for the entrance doors 10 of ventilation corridors of various large hydropower stations.

[0051] In the preferred scheme, the support 1 includes a base plate 11, and a flat pressure port 7 is provided on the base plate 11. When locked, the flat pressure port 7 can be closed by the clamping structure 6. A number of mounting holes 12 are provided on both sides of the base plate 11, and the base plate 11 and the entrance door 10 are fixed together. Slide grooves 13 are also provided on both sides of the base plate 11, and the clamping structure 6 can slide along the slide grooves. The above arrangement enables the opening and closing of the flat pressure port 7 to be realized, and the sliding of the clamping structure 6 is stable and reliable. At the same time, the flat pressure port 7 is connected to the inside of the air duct corridor to achieve air pressure balance, thereby reducing the resistance when the entrance door is opened, making the operation easier, thereby further improving the practicality and reliability of the device.

[0052] In the preferred scheme, sliders 61 are provided on both sides of the clampable structure 6, and the sliders 61 are clamped and fixed in the slide grooves 13 on both sides of the bottom plate 11 and slide along the slide grooves 13. An internal thread 62 is provided in the middle of the clampable structure 6, and an external thread is provided on the rotatable structure 2. The two are screwed together to connect and fix the clampable structure 6 and the rotatable structure 2 together to lock or unlock the support rod 3. The above settings enable the unlocking and clamping functions of the clampable structure 6 to be realized, and the structure is simple and easy to operate.

[0053] In the preferred scheme, a clamping seat 31 of the rotatable structure 2 is provided at one end of the support rod 3, and the clamping seat 31 is installed between the clamping structure 6 and the rotatable structure 2. The support rod 3 is unlocked or locked by rotating the rotatable structure 2, so that the support rod 3 rotates around the rotatable structure 2; the above setting enables the support rod 3 to lock or unlock the device, and can also be used as a lever to help open the entrance door 10. One rod has multiple uses, making the device structure more simple and compact, and the operation more convenient.

[0054] In a preferred embodiment, the head of the rotatable structure 2 is arranged in a plum blossom shape; the above arrangement facilitates the operation of the rotatable structure 2 and protects the operator from getting hurt, thereby further improving the practicability of the device.

[0055] In the preferred embodiment, after the support rod 3 is pulled out in the unlocked state, it is rotated and then locked, and serves as a door opening lever and handle, and assists in opening the entrance door 10 through the lever principle; the above arrangement enables the lever and handle functions of the support rod 3 to be realized, and the device has a simple structure and is easy to operate.

[0056] In the preferred solution, a sliding channel 5 for a drop pin 4 is provided on the support rod 3, and a sliding groove 8 is further provided at the other end of the support rod 3, in which the drop pin 4 is slidably installed, and the drop pin 4 slides along the sliding groove 8 on the sliding channel 5, and is limited by the front and rear ends of the sliding groove 8; the above arrangement enables the drop pin 4 to slide stably and reliably on the sliding channel 5 along the sliding groove 8, and be limited front and back, thereby further improving the reliability and stability of the device.

[0057] In a preferred embodiment, the opening assist device also includes a fixing device, which includes a bolt that fixes the support 1 to the entrance door 10 and is inserted into the mounting hole 12, and also includes a locking hole 9 into which the latch 4 can be dropped when the entrance door 10 is opened and locked. The above arrangement allows the device to be effectively fixed while the entrance door 10 can be locked after it is opened to prevent the operator's hands from being pinched by the door when it is closed quickly due to strong winds.

[0058] In the preferred solution, the entrance door 10 is provided with a threaded hole corresponding to the mounting hole 12, and the bolt is passed through the mounting hole 12 and installed into the threaded hole to fix the support 1 on the entrance door 10, and an air vent is opened on the entrance door 10 at a hole position corresponding to the equalizing port 7 on the support 1; the above arrangement enables the device to be effectively fixed while the equalizing port 7 is connected to the inside of the air duct corridor during the process of pulling the support rod 3 outward to unlock it, thereby achieving air pressure balance, thereby reducing the resistance when the entrance door is opened and making the operation easier.

[0059] In summary, the utility model provides an opening assist device for the entrance door of the ventilation corridor of a large hydropower station, which solves the problem that the existing entrance door 10 of the ventilation corridor is difficult to open and the safety hazard of easy pinching of hands after opening; by designing the equalizing port 7 for balancing the internal and external air pressures, the resistance when the entrance door 10 is opened is reduced, making the operation easier; by utilizing the lever principle, through the combination of the rotatable structure and the support rod 3, the easy opening of the entrance door 10 is achieved; by the cooperation of the dropable latch 4 and the sliding channel 5, the locking of the entrance door 10 is achieved, avoiding the problem of rapid closing and pinching of hands caused by wind pressure; the utility model can easily open and lock the entrance door 10, which not only improves the work efficiency, but also eliminates the safety hazard. At the same time, the device has exquisite design, simple structure, convenient operation and good practicality. It is suitable for the entrance doors 10 of ventilation corridors of various large hydropower stations, has broad application prospects, good economic and social benefits, and can be widely used and promoted in hydropower stations.

Claims

1. Applied to the opening assist device of the ventilation gallery entrance door of a large hydropower station, characterized by: The invention comprises a support (1) installed on an entry door (10), wherein the support (1) is slidably mounted with a support rod (3), a rotatable structure (2) is rotatably mounted on the support rod (3), a drop-down latch (4) and a sliding channel (5) and a slidable groove (8) for dropping the drop-down latch (4) are arranged on the support rod (3) at the other end of the rotatable structure (2), the sliding channel (5) is used for the sliding of the drop-down latch (4), and the slidable groove (8) is used for locking the drop-down latch (4), a compressible structure (6) is installed between the support (1) and the support rod (3), the compressible structure (6) is slidably mounted on the support (1), the rotatable structure (2) is rotatably mounted in the compressible structure (6) and is used for locking or unlocking the support rod (3), and a pressure-equalizing port (7) is also arranged on the support (1), and when the support rod (3) is unlocked and pulled outward, the pressure-equalizing port (7) balances the internal and external air pressures to reduce the resistance to opening the door.

2. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 1 is characterized in that: The support (1) comprises a bottom plate (11), and a flat pressure opening (7) is arranged on the bottom plate (11). When locked, the flat pressure opening (7) can be closed by the pressing structure (6). A plurality of mounting holes (12) are arranged on both sides of the bottom plate (11), and the bottom plate (11) and the entrance door (10) are fixedly mounted together. Slide grooves (13) are also arranged on both sides of the bottom plate (11), and the pressing structure (6) can slide along the slide grooves.

3. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 2 is characterized in that: Slide blocks (61) are provided on both sides of the compressible structure (6). The slide blocks (61) are fixed in the slide grooves (13) on both sides of the bottom plate (11) and slide along the slide grooves (13). An internal thread (62) is provided in the middle of the compressible structure (6). An external thread is provided on the rotatable structure (2). The two are screwed together to connect and fix the compressible structure (6) and the rotatable structure (2) together, thereby locking or unlocking the support rod (3).

4. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 3 is characterized in that: A pressing seat (31) of the rotatable structure (2) is provided at one end of the support rod (3); the pressing seat (31) is installed between the pressing structure (6) and the rotatable structure (2); the support rod (3) is unlocked or locked by rotating the rotatable structure (2), so that the support rod (3) rotates around the rotatable structure (2).

5. The opening assisting device for the entrance door of the ventilation gallery of a large hydropower station according to claim 4 is characterized in that: The head of the rotatable structure (2) is arranged in a plum blossom shape.

6. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 4 is characterized in that: After being pulled out in the unlocked state, the support rod (3) is rotated and then locked, and serves as a door opening lever and handle, and assists in opening the entry door (10) through the lever principle.

7. The opening assisting device for the entrance door of the ventilation gallery of a large hydropower station according to claim 4 is characterized in that: The support rod (3) is provided with a sliding channel (5) for a drop pin (4), and the other end of the support rod (3) is also provided with a sliding groove (8), in which the drop pin (4) is slidably installed. The drop pin (4) slides on the sliding channel (5) along the sliding groove (8) and is limited by the front and rear ends of the sliding groove (8).

8. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 7 is characterized in that: The drop-down latch (4) comprises a latch (41), one end of which is provided with a handle (42) for manually unlocking, pushing and pulling, sliding or locking the drop-down latch (4), and two sides of the bottom of the latch (41) are provided with slides (43), which pass through a slidable groove (8) on the support rod (3) and slide on the slide channel (5).

9. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 8 is characterized in that: The opening assist device also includes a fixing device, which includes a bolt that fixes the support (1) to the entry door (10) and is inserted into the mounting hole (12), and also includes a locking hole (9) into which the latch (4) can be dropped when the entry door (10) is opened and locked.

10. The opening assist device for the entrance door of the ventilation gallery of a large hydropower station according to claim 9, characterized in that: The entry door (10) is provided with a threaded hole corresponding to the mounting hole (12), and a bolt is inserted into the threaded hole through the mounting hole (12) to fix the support (1) on the entry door (10). The entry door (10) is provided with an air vent at a hole position corresponding to the flat pressure port (7) on the support (1).

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