CN215568347U

CN215568347U - Remote actuating mechanism of smoke exhaust valve

Info

Publication number: CN215568347U
Application number: CN202122142065.8U
Authority: CN
Inventors: 戚江华
Original assignee: Ningbo Dongling Plumb & Air Conditioning Parts And Accessories Co ltd
Current assignee: Ningbo Dongling Plumb & Air Conditioning Parts And Accessories Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-01-18
Anticipated expiration: 2031-09-06

Abstract

The utility model discloses a remote actuating mechanism of a smoke exhaust valve, which comprises a shell, wherein a bottom plate of the shell is rotatably provided with a swing rod, a swing frame and a winch, the winch consists of a concentric limiting ring, a ratchet wheel and a rope shaft, the head end of a stay rope is fixed with the rope shaft, the stay rope is wound on the rope shaft, and the limiting ring and the ratchet wheel limit the stay rope from the upper direction and the lower direction; a pawl is arranged on the swing frame, a main torsion spring used for enabling the swing frame to swing in the positive direction so as to be far away from the ratchet wheel is arranged on the swing frame shaft, an electromagnet is arranged on the bottom plate of the shell, and a core shaft of the electromagnet is connected with the head end of the swing rod; under the initial condition, the electromagnet power-off core shaft extends out, the tail end of the oscillating bar clamps the head end of the oscillating frame, and a pawl on the oscillating frame is clamped with the ratchet wheel in a one-way manner; the pawl is hinged on the swing frame shaft, and the swing frame shaft is further provided with an auxiliary torsion spring for enabling the pawl to abut against the ratchet wheel. The remote actuating mechanism can reduce the probability of the clamping of the contact part between the tail end of the swing rod and the head end of the swing frame.

Description

Remote actuating mechanism of smoke exhaust valve

Technical Field

The utility model relates to the field of safety engineering, in particular to a remote actuating mechanism of a smoke exhaust valve.

Background

The smoke exhaust valve is matched with the remote actuating mechanism in the ventilation pipeline of the building, a reset device such as a reset torsion spring arranged on a door shaft is arranged on the door shaft of the smoke exhaust valve, or a deflector rod is fixed on the door shaft, a reset tension spring is arranged between the deflector rod and the wall of the ventilation pipeline, and a pull rope of the remote actuating mechanism is directly connected with the valve or indirectly connected with the valve through the deflector rod. Under normal conditions, the remote actuating mechanism tensions the inhaul cable to overcome the action of the reset torsion spring or the reset tension spring to close the valve, when a fire occurs, the actuating mechanism acts to loosen the inhaul cable, and the valve opens to discharge smoke under the action of the reset torsion spring or the reset tension spring.

The remote actuating mechanism of the smoke exhaust valve in the prior art is shown in a patent with the patent number of CN201920306362.1 and comprises a shell, a bottom plate of the shell is rotatably provided with a swing rod, a swing frame and a winch, the winch is composed of a limit ring, a ratchet wheel and a cable shaft, the swing rod, the swing frame and the winch are concentric and fixed into a whole, the head end of a guy cable is fixed with the cable shaft, the guy cable is wound on the cable shaft, and the limit ring and the ratchet wheel limit the wound guy cable at the upper end and the lower end; a pawl is arranged on one side of the swing frame close to the swing rod, and a main torsion spring for enabling the pawl to be separated from the ratchet wheel is arranged on the swing frame shaft; the bottom plate of the shell is provided with an electromagnet, a mandrel of the electromagnet is connected with the head end of the swing rod, under a normal condition, the electromagnet is powered off, the mandrel extends out, the tail end of the swing rod clamps the head end of the swing frame, a pawl on the swing frame is clamped with the ratchet wheel in a one-way mode to prevent the ratchet wheel and the winch from rotating in the forward direction, under the state, the winch is manually rotated in the reverse direction, the stay cable is tensioned continuously, and meanwhile the stay cable overcomes the action of the door spindle resetting device to close the valve.

When a fire occurs, the electromagnet is electrified, the mandrel retracts to pull the head end of the swing rod, the tail end of the swing rod is lifted and separated from the swing frame, the swing frame which is blocked by the swing rod is lost and swings forwards under the action of the main torsion spring, the pawl is enabled to be separated from the ratchet wheel, the restraint on the ratchet wheel and the winch is loosened, the winch rotates forwards, the stay cable is loosened, and the valve is opened to discharge smoke under the action of the door spindle resetting device such as the reset torsion spring.

When the chain needs to be re-wound after the fire is over, the electromagnet is powered off to reset the swing rod, the swing frame reversely swings, the head end of the swing frame is clamped with the tail end of the swing rod again, the pawl and the ratchet wheel are synchronously and unidirectionally clamped, and finally the ratchet wheel is reversely rotated by the wrench again, the inhaul cable is re-tensioned, and the valve is closed.

The remote actuator described above has the following drawbacks. Under a normal state, when the head end of the swing frame is clamped with the tail end of the swing rod and the pawl is also clamped with the ratchet wheel in a one-way mode, the tensioned inhaul cable can continuously drag the ratchet wheel to enable the ratchet wheel to generate a trend of forward rotation, the trend is prevented by the pawl, so that the ratchet wheel has continuous pressure on the pawl, the pressure can be transmitted to the swing frame through the pawl to generate a forward swinging torque on the swing frame, and the forward swinging torque is offset due to the fact that the tail end of the swing rod abuts against the head end of the swing frame; therefore, under a normal state, the tail end of the swing rod and the head end of the swing frame can mutually abut against each other to form larger pressure, and the pressure is changed into larger frictional resistance in the action process that the tail end of the swing rod is attempted to be separated from the head end of the swing frame; like this, when the condition of a fire takes place, the electro-magnet adsorbs the dabber and must be greater than the frictional resistance that the pendulum rod tail end received to dragging power of pendulum rod head end, could guarantee the normal action of mechanism, but in the actual work process, the pendulum rod tail end supports with the pendulum rack head end for a long time each other and leans on, frictional resistance just is great originally, including the permanent pendulum rod pendulum rack contact site of time factor such as rusty that wets, lead to the pendulum rod pendulum rack contact site card to die, the electro-magnet can't drag the pendulum rod tail end and pendulum rack head end open, lead to whole mechanism to become invalid, can't discharge fume, the job stabilization nature is poor.

Moreover, when the swing rod, the swing frame, the pawl and the ratchet wheel are disengaged, the valve resetting device provides power to pull the cable out of the winch, and the cable has large elasticity and the power of the valve resetting device is limited, so that the situation that the length of the cable which is suddenly loosened and separated is larger than the traction length of the valve resetting device is often generated in the practical working process, the surplus length of the cable suddenly expands, the cable crosses the swing frame to be hooked with other parts, and finally the cable is blocked. To overcome the above-mentioned problem, the prior art, as in patent application No. CN201920306362.1, has proposed to provide a shield in the housing of the actuator to limit the expansion of the cable, and proposed two specific structures, 1 to fix a plurality of stop pins on the stop ring, and 2 to fix a metal retainer ring on the housing bottom plate by using two sheet metal parts. However, in practice, it has been found that both of the above-described specific structures of the shade are deficient. The stop pin type structure needs to assemble each stop pin one by one, and the process is complicated and laborious; and the metal retainer ring type only has one layer of annular baffle, the strength is slightly insufficient, the metal piece bending and forming process is troublesome, any shape meeting the strength requirement cannot be made, and the manufacturing cost is also low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a smoke exhaust valve remote actuating mechanism which can reduce the probability of the clamping of the contact part between the tail end of a swing rod and the head end of a swing frame.

The technical scheme of the utility model is that the remote actuating mechanism of the smoke exhaust valve comprises a shell, a bottom plate of the shell is rotatably provided with a swing rod, a swing frame and a winch, the winch comprises a concentric limiting ring, a ratchet wheel and a rope shaft, the head end of a stay rope is fixed with the rope shaft, the stay rope is wound on the rope shaft, and the limiting ring and the ratchet wheel limit the stay rope from the upper direction and the lower direction; a pawl is arranged on the swing frame, a main torsion spring used for enabling the swing frame to swing in the positive direction so as to be far away from the ratchet wheel is arranged on the swing frame shaft, an electromagnet is arranged on the bottom plate of the shell, and a core shaft of the electromagnet is connected with the head end of the swing rod; under the initial condition, the electromagnet power-off core shaft extends out, the tail end of the oscillating bar clamps the head end of the oscillating frame, and a pawl on the oscillating frame is clamped with the ratchet wheel in a one-way manner; the pawl is hinged on the swing frame shaft, and the swing frame shaft is further provided with an auxiliary torsion spring for enabling the pawl to abut against the ratchet wheel.

Compared with the prior art, the remote actuating mechanism of the smoke exhaust valve with the structure has the following advantages.

The force of the executing mechanism is analyzed in a normal state, namely when the head end of the swing frame is clamped with the tail end of the swing rod and the pawl is also clamped with the ratchet wheel in a one-way mode. In this state, the tensioned cable can still continuously drag the ratchet wheel to make the ratchet wheel generate a trend of forward rotation, the trend is still prevented by the pawl, so the ratchet wheel still keeps a continuous pressure on the pawl, but because the pawl is directly hinged on the swing frame shaft and is not eccentrically arranged on one side of the swing frame shaft, the pressure of the ratchet wheel on the pawl can not form a forward swinging torque like the prior art but is completely born by the swing frame shaft, thus, the partial pressure can not be transmitted to the contact part of the swing frame and the swing rod, the partial pressure can not increase the contact force between the tail end of the swing rod and the head end of the swing frame, thereby greatly reducing the resistance when the tail end of the swing rod is separated from the head end of the swing frame, further obviously reducing the probability of the dead clamping of the contact part of the swing rod and the swing frame, namely obviously improving the probability of the electromagnet absorbing the core shaft to pull the swing rod open, and enabling the mechanism to normally act, enhancing the working stability.

Preferably, the swing frame is a channel steel formed by a top steel plate, a side steel plate and a bottom steel plate, an opening of the swing frame faces the ratchet wheel, and a swing frame shaft penetrates through the top steel plate and the bottom steel plate; the main torsion spring is sleeved on the shaft section of the swing frame shaft between the bottom steel plate and the shell bottom plate, and two ends of the main torsion spring are respectively fixed with the shell bottom plate and the bottom steel plate; the auxiliary torsion spring is sleeved on the shaft section of the swing frame shaft between the bottom steel plate and the top steel plate, and two ends of the auxiliary torsion spring are respectively fixed with the pawl and the top steel plate; therefore, the structure is convenient to assemble, and only the auxiliary torsion springs need to be placed in the swing frame and then pass through the swing frame shaft, the main torsion springs are sleeved on the swing frame shaft section below the swing frame, and each end of the two torsion springs is welded and fixed on the corresponding part; the two torsion springs are reasonable in layout and are just separated by the bottom steel plate of the swing frame, and the functions of the two torsion springs are not interfered with each other; moreover, the channel-section steel structure of rocker just retrains vice torsional spring between the top steel sheet of rocker and end steel sheet, so ensure that vice torsional spring installation is firm, and difficult pine takes off, and in the same way, the main torsional spring of installing between end steel sheet and casing bottom plate is installed firmly reliably equally.

Preferably, the bottom plate of the shell is connected with a side rectangular frame with an opening at the upper right corner through two mounting seats, a C-shaped upper reinforcing plate with an opening at the upper right corner is arranged at the upper edge of the side rectangular frame, a C-shaped lower reinforcing plate with an opening at the upper right corner is arranged at the lower edge of the side rectangular frame, the C-shaped upper reinforcing plate, the side rectangular frame and the C-shaped lower reinforcing plate are integrated into a plastic shell cover, a rope shaft is sleeved in a central hole of the plastic shell cover, and the plastic shell cover is positioned between the limiting ring and the ratchet wheel; therefore, the shielding object with the structure is arranged in the shell, and the integrity and firmness of the plastic shell cover are obviously improved by the upper reinforcing plate and the lower reinforcing plate, so that the ideal strength and long service life of the plastic shell cover are ensured; moreover, the shielding object is a plastic part, is formed by die casting, is convenient to prepare, and the cost is reduced by mass production after the die is opened, and the manufacturing cost of a single plastic shell cover is lower than that of a metal retainer ring and a sheet metal part in the prior art.

Drawings

FIG. 1 is a schematic top view of a remote actuator for a smoke evacuation valve according to the present invention.

FIG. 2 is a schematic view of the remote actuator of the smoke damper of the present invention with a portion of the housing removed.

FIG. 3 is a schematic view of the remote actuator of the smoke damper of the present invention with portions of the housing and plastic housing removed.

FIG. 4 is a schematic view of the explosion structure of the winch of the remote actuator of the smoke damper of the present invention.

The device comprises a shell 1, a shell 2, a swing rod 3, a swing frame 3.1, a top steel plate 3.2, a side steel plate 3.3, a bottom steel plate 4, a limiting ring 5, a ratchet wheel 6, a rope shaft 7, a rope 8, a pawl 9, a swing frame shaft 10, a main torsion spring 11, an electromagnet 12, an auxiliary torsion spring 13, a mounting seat 14, a side rectangular frame 15, a C-shaped upper reinforcing plate 16 and a C-shaped lower reinforcing plate.

Detailed Description

The utility model is further described with reference to the following figures and specific examples.

As shown in figures 1-4, the remote actuating mechanism of the smoke exhaust valve comprises a shell 1, wherein a bottom plate of the shell 1 is rotatably provided with a swing rod 2, a swing frame 3 and a winch. The winch is composed of a concentric limiting ring 4, a ratchet wheel 5 and a rope shaft 6, and the rope shaft 6 passes through a central hole of the ratchet wheel 5 and then is rotatably arranged on a bottom plate of the shell 1; the head end of the inhaul cable 7 is fixed with the inhaul cable shaft 6, the inhaul cable 7 is wound on the inhaul cable shaft 6, and the limiting ring 4 and the ratchet wheel 5 limit the inhaul cable 7 from the upper direction and the lower direction.

The swing frame 3 is provided with a pawl 8, and the swing frame shaft 9 is provided with a main torsion spring 10 which is used for enabling the swing frame 3 to swing in the positive direction so as to enable the head end of the swing frame 3 to be far away from the ratchet wheel 5. The bottom plate of the shell 1 is provided with an electromagnet 11, and a mandrel of the electromagnet 11 is connected with the head end of the oscillating bar 2; under the initial condition, the electromagnet 11 cuts off the power supply core shaft and extends out, the tail end of the swing rod 2 clamps the head end of the swing frame 3, the pawl 8 on the swing frame 3 is in one-way clamping with the ratchet wheel 5 to prevent the ratchet wheel 5 and the winch from rotating in the forward direction, and the inhaul cable 7 is tensioned and overcomes the action of the smoke exhaust valve resetting device to close the valve.

The connection structure of the winch, the swing rod 2, the swing frame 3, the inhaul cable 7 and the electromagnet 11 and the action principle of the cooperation with the smoke exhaust valve resetting device are completely the same as those in the prior art. The improvement of the application is that 1 is the installation position of the pawl 8 and the connecting structure of the pawl 8 and the swing frame 3; 2 is a structure for restricting a shade of the cable 7 near the capstan.

In particular, the pawl 8 is hinged on the rocker shaft 9, and a secondary torsion spring 12 for urging the pawl 8 against the ratchet 5 is also provided on the rocker shaft 9. More specifically, the swing frame 3 is a channel steel composed of a top steel plate 3.1, a side steel plate 3.2 and a bottom steel plate 3.3, an opening of the swing frame 3 faces the ratchet wheel 5, and a swing frame shaft 9 penetrates through the top steel plate 3.1 and the bottom steel plate 3.3; the main torsion spring 10 is sleeved on the shaft section of the swing frame shaft 9 between the bottom steel plate 3.3 and the bottom plate of the shell 1, and two ends of the main torsion spring 10 are respectively fixed with the bottom plate of the shell 1 and the bottom steel plate 3.3; the auxiliary torsion spring 12 is sleeved on the shaft section of the swing frame shaft 9 between the bottom steel plate 3.3 and the top steel plate 3.1, and two ends of the auxiliary torsion spring 12 are respectively fixed with the pawl 8 and the top steel plate 3.1.

The bottom plate of the shell 1 is in threaded connection with two mounting seats 13, the two mounting seats 13 are connected with a side rectangular frame 14 with an opening at the upper right corner, the side rectangular frame 14 is centered, the two mounting seats 13 are respectively positioned at two sides, a C-shaped upper reinforcing plate 15 with an opening at the upper right corner is arranged on the upper side of the side rectangular frame 14, a C-shaped lower reinforcing plate 16 with an opening at the upper right corner is arranged on the lower side of the side rectangular frame 14, the C-shaped upper reinforcing plate 15, the side rectangular frame 14 and the C-shaped lower reinforcing plate 16 are integrally formed into a plastic shell, and the two mounting seats 13 and the plastic shell are also integrally formed by injection molding; the central hole of the plastic shell covers the rope shaft 6, and the height of the plastic shell is between the limiting ring 4 and the ratchet wheel 5.

Claims

1. A smoke exhaust valve remote actuating mechanism comprises a shell (1), wherein a bottom plate of the shell (1) is rotatably provided with a swing rod (2), a swing frame (3) and a winch, the winch is composed of a concentric limiting ring (4), a ratchet wheel (5) and a rope shaft (6), the head end of a stay rope (7) is fixed with the rope shaft (6), the stay rope (7) is wound on the rope shaft (6), and the limiting ring (4) and the ratchet wheel (5) limit the stay rope (7) from the upper direction and the lower direction; a pawl (8) is arranged on the swing frame (3), a main torsion spring (10) which is used for enabling the swing frame (3) to swing in the positive direction so as to be far away from the ratchet wheel (5) is arranged on a swing frame shaft (9), an electromagnet (11) is arranged on a bottom plate of the shell (1), and a core shaft of the electromagnet (11) is connected with the head end of the swing rod (2); under the initial condition, the electromagnet (11) cuts off the power and the mandrel extends out, the tail end of the swing rod (2) clamps the head end of the swing frame (3), and the pawl (8) on the swing frame (3) is clamped with the ratchet wheel (5) in a one-way mode; the method is characterized in that: the pawl (8) is hinged on the swing frame shaft (9), and an auxiliary torsion spring (12) used for enabling the pawl (8) to abut against the ratchet wheel (5) is further arranged on the swing frame shaft (9).

2. A remote actuator for a smoke exhaust valve according to claim 1, wherein: the swing frame (3) is a channel steel consisting of a top steel plate (3.1), a side steel plate (3.2) and a bottom steel plate (3.3), an opening of the swing frame (3) faces the ratchet wheel (5), and a swing frame shaft (9) penetrates through the top steel plate (3.1) and the bottom steel plate (3.3); the main torsion spring (10) is sleeved on the shaft section of the swing frame shaft (9) between the bottom steel plate (3.3) and the bottom plate of the shell (1), and two ends of the main torsion spring (10) are respectively fixed with the bottom plate of the shell (1) and the bottom steel plate (3.3); the auxiliary torsion spring (12) is sleeved on the shaft section of the swing frame shaft (9) between the bottom steel plate (3.3) and the top steel plate (3.1), and two ends of the auxiliary torsion spring (12) are respectively fixed with the pawl (8) and the top steel plate (3.1).

3. A remote actuator for a smoke exhaust valve according to claim 1, wherein: casing (1) bottom plate is connected with upper right corner open-ended side rectangle frame (14) through two mount pads (13), be equipped with reinforcing plate (15) on the upper right corner open-ended C shape above side rectangle frame (14), be equipped with reinforcing plate (16) under the upper right corner open-ended C shape below side rectangle frame (14), reinforcing plate (15) on the C shape, reinforcing plate (16) are integrated into one piece's plastics clamshell under side rectangle frame (14) and the C shape, rope shaft (6) are lived to the centre bore cover of this plastics clamshell, this plastics clamshell is located between spacing ring (4) and ratchet (5).