A fire hydrant intelligent lock

Abstract

The present invention discloses a fire hydrant smart lock in the technical field of fire-fighting equipment Internet of Things terminals, comprising a pipeline, a lock shell is fixedly installed on the front wall of the pipeline, a valve stem is provided in the inner cavity of the pipeline, a ratchet is clamped on the outer wall of the valve stem, the ratchet is located in the inner cavity of the lock shell, a first limit switch and a second limit switch are respectively provided in the inner cavity of the lock shell, a reduction motor is screwed on the front wall of the lock shell through a reduction motor fixing block, the output shaft of the reduction motor passes through the front wall of the lock shell, an eccentric cam is installed on the output shaft of the reduction motor through a C key, a pawl is pinned in the inner cavity of the lock shell, the end of the pawl is clamped on the outer wall of the ratchet, the outer wall of the eccentric cam contacts the outer wall of the pawl, a tension spring column is fixedly installed on the front wall of the lock shell, and a tension spring is provided on the outer wall of the tension spring column. The device avoids the situation that the valve cannot be closed when the valve is not closed when the lock is closed, avoids the inability to quickly activate the fire hydrant or valve in the event of an unlocking failure or a fire emergency, and has stronger environmental adaptability.

Description

Technical Field

[0001] The invention discloses a fire hydrant smart lock, specifically in the technical field of fire-fighting equipment Internet of Things terminals. Background Art

[0002] Fire protection systems include outdoor fire hydrant systems, indoor fire hydrant systems, fire extinguisher systems, and some also have automatic sprinkler systems, water cannon systems, gas fire extinguishing systems, fire detection systems, water mist systems, etc. Fire hydrant sets are generally composed of fire boxes + fire hoses + water guns + connectors + plugs + clips, etc. Fire hydrants are mainly used for fire trucks to take water from the municipal water supply network or outdoor fire water supply network to extinguish fires, and can also be directly connected to water hoses and water guns to discharge water for fire extinguishing. Therefore, indoor and outdoor fire hydrant systems are also one of the important firefighting facilities for fighting fires.

[0003] Traditional fire hydrants and fire hydrant valves are opened and closed by turning the valve stem with a wrench, which makes it easy to illegally take water and steal water. Summary of the invention

[0004] The purpose of the present invention is to provide a fire hydrant intelligent lock to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fire hydrant intelligent lock comprises a pipe, a lock shell is fixedly installed on the front wall of the pipe, a valve stem is provided in the inner cavity of the pipe, a ratchet is clamped on the outer wall of the valve stem, the ratchet is located in the inner cavity of the lock shell, the inner cavity of the lock shell is respectively provided with a first limit switch and a second limit switch, the front wall of the lock shell is screwed with a reduction motor through a reduction motor fixing block, the output shaft of the reduction motor passes through the front wall of the lock shell, an eccentric cam is installed on the output shaft of the reduction motor through a C key, the eccentric cam is located in the inner cavity of the lock shell, a pawl is pinned in the inner cavity of the lock shell, the end of the pawl is clamped with the outer wall of the ratchet, the outer wall of the eccentric cam contacts the outer wall of the pawl, a tension spring column is fixedly installed on the front wall of the lock shell, a tension spring is provided on the outer wall of the tension spring column, and one end of the tension spring is connected to the outer wall of the pawl.

[0006] Preferably, a fixing block is installed on the rear wall of the lock housing by screws, an emergency unlocking pin groove is opened on the bottom wall of the fixing block, and an emergency unlocking pin and a first compression spring are provided in the inner cavity of the emergency unlocking pin groove, one end of the emergency unlocking pin is located in the inner cavity of the first compression spring, and both ends of the compression spring are respectively in contact with the shoulder of the emergency unlocking pin and the wall of the emergency unlocking pin groove of the fixing block.

[0007] Preferably, a slot is formed on the bottom wall of the fixed block, and the inner cavity of the slot is respectively provided with a bayonet, a second compression spring and a reset pin, the second compression spring is located in the inner cavity of the bayonet, one end of the bayonet is engaged with the end of the emergency unlocking pin, and the end of the reset pin is in contact with the outer wall of the bayonet.

[0008] Preferably, a cone head is provided at the end of the reset pin.

[0009] Preferably, an emergency glass is screwed onto the outer wall of the lock housing.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1) The pawl and ratchet of this device can rotate the valve stem to close the valve when locked, but cannot rotate the valve stem to open the valve. This device can achieve timed automatic locking, which solves the problem of forgetting to lock after use and avoids the situation where the valve cannot be closed when the valve is not closed when the lock is closed;

[0012] 2) The device is equipped with a reduction motor, an eccentric cam, a pawl, a tension spring and a ratchet. Manual operation is not required for unlocking and locking. All components are encapsulated in the lock shell to avoid human damage and have stronger environmental adaptability;

[0013] 3) The device is equipped with a purely mechanical emergency unlocking mechanism to avoid the inability to quickly activate the fire hydrant or valve in the event of an unlocking failure or fire emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view cross-sectional schematic diagram of the smart lock of the present invention;

[0015] Figure 2 This is a schematic diagram of the unlocking state of the smart lock of the present invention;

[0016] Figure 3 This is a schematic diagram of the emergency unlocking state of the smart lock of the present invention.

[0017] In the figure: 100 pipeline, 110 lock housing, 120 valve stem, 130 ratchet, 140 first limit switch, 150 second limit switch, 200 reduction motor, 210 eccentric cam, 220 pawl, 230 tension spring column, 240 tension spring, 300 fixing block, 310 emergency unlocking pin, 320 first compression spring, 330 reset pin, 340 second compression spring, 350 latch, 360 emergency glass. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides a fire hydrant intelligent lock, which avoids the situation that the valve cannot be closed when the lock is closed and the valve is not closed, and avoids the situation that the fire hydrant or valve cannot be quickly activated in the event of a lock failure or fire emergency. It has stronger environmental adaptability. Please refer to Figure 1 , comprising a pipe 100, a lock shell 110 is fixedly installed on the front wall of the pipe 100, a valve stem 120 is arranged in the inner cavity of the pipe 100, a ratchet 130 is clamped on the outer wall of the valve stem 120, the ratchet 130 is located in the inner cavity of the lock shell 110, a first limit switch 140 and a second limit switch 150 are respectively arranged in the inner cavity of the lock shell 110, a trimming circular hole is arranged in the center of the ratchet 130, the valve stem 120 passes through the ratchet, and when the valve stem 120 rotates, the ratchet 130 is driven to rotate;

[0020] Please refer again Figure 1The front wall of the lock housing 110 is screwed with a reduction motor 200 through a reduction motor fixing block, the output shaft of the reduction motor 200 passes through the front wall of the lock housing 110, and the output shaft of the reduction motor 200 is installed with an eccentric cam 210 through a C key. The eccentric cam 210 is located in the inner cavity of the lock housing 110, and a pawl 220 is pinned in the inner cavity of the lock housing 110. The end of the pawl 220 is clamped with the outer wall of the ratchet 130, and the outer wall of the eccentric cam 210 contacts the outer wall of the pawl 220. A tension spring column 230 is fixedly installed on the front wall of the lock housing 110, and the tension spring column 230 is fixedly installed on the front wall of the lock housing 110. The outer wall of the spring column 230 is provided with a tension spring 240, one end of the tension spring 240 is connected to the outer wall of the pawl 220, the reduction motor 200 is clamped on the lock housing 110 through the reduction motor fixing block on the back of the lock housing, the rotating shaft of the reduction motor 200 passes through the round hole on the lock housing 110 and is connected to the eccentric cam 210 through the C key, the reduction motor 200 can drive the eccentric cam 210 to rotate, the claw end of the pawl 220 is clamped in the groove of the ratchet 130, and the other end is provided with a spring connecting hole, which is connected to one end of the tension spring 240, and the other end of the tension spring 240 is connected to the outer wall of the ratchet 130. One end is connected to the tension spring column 230, which is provided with a thread and screwed into the screw hole of the lock housing 110. The pawl 220 has a cylindrical boss at the corner, and the lock housing 110 has a circular groove. After the cylindrical boss of the pawl 220 is inserted into the circular groove of the lock housing 110, the pawl 220 can be moved by the center of the cylindrical boss. When the lock is closed, a lock command is sent, the reduction motor 200 is turned on, and when the thick end of the eccentric cam 210 rotates to the second limit switch 150, the second limit switch 150 is squeezed by the eccentric cam 210 to generate a limit signal, and the reduction motor 2 00 and the eccentric cam 210 stop rotating. At this time, the pawl 220 is clamped into the groove of the ratchet 130 under the pulling force of the tension spring 240, and the mechanism is in a locked state. When unlocking, an unlocking command is sent, the reduction motor 200 is turned on, and the thick end of the eccentric cam 210 pushes up the pawl lever, the pawl 220 is moved, and the first limit switch 140 is squeezed by the pawl 220 to generate a limit signal. The reduction motor 200 stops rotating, and the eccentric cam 210 stops rotating. At this time, the pawl 220 claw end is pulled out from the groove of the ratchet 130 and is in an unlocked state;

[0021] Please refer again Figure 1The rear wall of the lock housing 110 is fixed with a fixing block 300 by screws, the bottom wall of the fixing block 300 is provided with an emergency unlocking pin groove, and the inner cavity of the emergency unlocking pin groove is provided with an emergency unlocking pin 310 and a first compression spring 320, one end of the emergency unlocking pin 310 is located in the inner cavity of the first compression spring 320, and the two ends of the compression spring 320 are respectively in contact with the shoulder of the emergency unlocking pin and the wall of the emergency unlocking pin groove of the fixing block 300, a card slot is provided on the bottom wall of the fixing block 300, and the inner cavity of the card slot is respectively provided with a card pin 350, a second compression spring 340 and a reset pin 330, the second compression spring 340 is located in the inner cavity of the card pin 350, and one end of the card pin 350 is carded with the end of the emergency unlocking pin 310, The end of the reset pin 330 contacts the outer wall of the latch 350. The outer wall of the lock housing 110 is screwed with an emergency glass 360. When emergency unlocking is performed, the emergency glass 360 is smashed, the emergency unlocking pin 310 is pressed, and the latch 350 is pushed into the slot of the emergency unlocking pin 310 under the action of the second compression spring 340. At this time, the emergency unlocking pin 310 is stuck in the emergency unlocking position. Under the action of the emergency unlocking pin 310, the pawl 220 is moved to the unlocking position to complete the emergency unlocking. By pressing the reset pin 330, the latch 350 is pushed out of the slot of the emergency unlocking pin 310. At this time, the emergency unlocking pin 310 returns to the initial position under the action of the first compression spring 320, completing the reset of the emergency unlocking device.

[0022] Although the present invention has been described above with reference to some embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalent components without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the various embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fire hydrant smart lock, characterized by: The invention comprises a pipeline (100), a lock shell (110) is fixedly installed on the front wall of the pipeline (100), a valve stem (120) is arranged in the inner cavity of the pipeline (100), a ratchet (130) is clamped on the outer wall of the valve stem (120), the ratchet (130) is located in the inner cavity of the lock shell (110), a first limit switch (140) and a second limit switch (150) are respectively arranged in the inner cavity of the lock shell (110), a reduction motor (200) is screwed to the front wall of the lock shell (110) through a reduction motor fixing block, and the reduction motor (200) ) passes through the front wall of the lock housing (110); the output shaft of the reduction motor (200) is installed with an eccentric cam (210) through a C key; the eccentric cam (210) is located in the inner cavity of the lock housing (110); a pawl (220) is pinned to the inner cavity of the lock housing (110); the end of the pawl (220) is engaged with the outer wall of the ratchet (130); the outer wall of the eccentric cam (210) contacts the outer wall of the pawl (220); a tension spring column (230) is fixedly installed on the front wall of the lock housing (110); the tension spring column (2 The outer wall of the lock housing (110) is provided with a tension spring (240), one end of which is connected to the outer wall of the pawl (220), a fixing block (300) is installed on the rear wall of the lock housing (110) by screws, the bottom wall of the fixing block (300) is provided with an emergency unlocking pin groove, and the inner cavity of the emergency unlocking pin groove is provided with an emergency unlocking pin (310) and a first compression spring (320), one end of the emergency unlocking pin (310) is located in the inner cavity of the first compression spring (320), and the two ends of the compression spring (320) are respectively connected to the inner cavity of the emergency unlocking pin. The shoulder contacts the wall of the emergency unlocking pin groove of the fixed block (300); a slot is formed on the bottom wall of the fixed block (300); and the inner cavity of the slot is provided with a bayonet pin (350), a second compression spring (340) and a reset pin (330), respectively; the second compression spring (340) is located in the inner cavity of the bayonet pin (350); one end of the bayonet pin (350) is engaged with the end of the emergency unlocking pin (310); the end of the reset pin (330) contacts the outer wall of the bayonet pin (350); and an emergency glass (360) is screwed onto the outer wall of the lock housing (110).

2. The fire hydrant smart lock according to claim 1, characterized in that: The end of the reset pin (330) is provided with a cone head.

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