Alarm device capable of automatically ascending and descending

Abstract

The utility model discloses an alarm device capable of automatically lifting, relates to the technical field of alarms, and is mainly used for solving the problem that an alarm device capable of automatically lifting is urgently needed at present. The main structure of the device is that the device comprises a fixed seat fixedly arranged on a roof, a movable seat is arranged below the fixed seat through a metal cable hanger capable of being vertically wound and unwound, an alarm is fixedly arranged on the lower end face of the movable seat, a winding and unwinding mechanism used for winding and unwinding the metal cable is arranged in the fixed seat, and a controller capable of controlling the winding and unwinding mechanism to operate is further arranged in the fixed seat. The utility model provides the alarm device capable of automatically lifting, which can realize the automatic lifting of the alarm, thereby facilitating the maintenance and avoiding the influence on the installation and layout of a workshop at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of alarm devices, in particular to an alarm device capable of automatically rising and falling. Background Art

[0002] With the development of technology, more and more types of resources can be used by human beings. For example, hydrogen energy, as one of the purest energy sources, has the characteristics of high combustion calorific value, abundant resources, and sustainable development, and is widely produced and used. But at the same time, its relatively active chemical properties make it easy to cause safety hazards during production and use. Therefore, adding alarms to workshops and factories that produce such resources has become a necessary condition to effectively avoid safety hazards.

[0003] Most of the current alarms are installed in a fixed or winch-mounted manner. However, since factories and workshops are generally very tall, and the alarms are fixed on the roofs of factories and workshops, when repairing fixed alarms, it is necessary to use an automatic lift truck to arrange manpower for high-altitude operations, which is very inconvenient and has certain safety hazards; and for winch-mounted alarms, for large workshops that need to install multiple sets of alarms, the layout of the winch and the installation position of the pulley block will seriously affect the overall installation layout of the workshop, and invisibly increase the maintenance and use costs of the workshop.

[0004] Therefore, there is an urgent need for a new alarm device that can automatically rise and fall. Utility Model Content

[0005] The purpose of the utility model is to provide an alarm device capable of automatic lifting and lowering, which can realize automatic lifting and lowering of the alarm, thereby facilitating maintenance while also avoiding the influence on the installation layout of the workshop.

[0006] The utility model solves the above technical problems through the following technical solution: an alarm device capable of automatic lifting and lowering comprises a fixed seat, a movable seat is suspended below the fixed seat by a metal cable capable of vertically retracting and releasing, an alarm is fixedly arranged on the lower end surface of the movable seat, a retracting and releasing mechanism for retracting and releasing the metal cable is arranged inside the fixed seat, and a controller capable of controlling the operation of the retracting and releasing mechanism is also arranged inside the fixed seat.

[0007] As a further improvement of the utility model, the retractable wire mechanism includes a motor mounting plate vertically arranged in a fixed seat, a retractable wire winch capable of vertical rotation is mounted on one side of the motor mounting plate, and a permanent magnet motor with an output end connected to the rotating shaft of the retractable wire winch is mounted on the other side of the plate; the permanent magnet motor is electrically connected to the controller;

[0008] A pulley block mounting frame is arranged in the movable seat, and a pulley block capable of vertical rotation is arranged on the pulley block mounting frame. One end of the metal cable is fixedly connected to the winding and releasing winch, and the other end passes through the pulley block and is fixedly connected to the fixed seat.

[0009] As a further improvement of the utility model, a line-following assembly is provided below the retractable capstan, and the line-following assembly includes a threaded shaft extending in the same direction as the rotating shaft of the retractable capstan, one end of the threaded shaft is rotatably connected to the motor mounting plate, and the other end is rotatably connected to a vertically arranged line-following assembly mounting plate;

[0010] The threaded shaft is provided with a cable shunter which cooperates with its thread, and a cable passage for the metal cable to pass through is vertically provided on the side of the cable shunter away from the threaded shaft. One side of the threaded shaft is also provided with a guide rod which extends in the same direction as the threaded shaft and movably passes through the cable shunter, and the two ends of the guide rod are respectively connected to the motor mounting plate and the cable shunting assembly mounting plate.

[0011] As a further improvement of the utility model, a driving gear that can rotate axially and whose axis is transmission connected to the axis of the reel-and-reel winch is provided on the mounting plate of the line-following component. A driven gear that can rotate axially and whose axis is transmission connected to the end of the threaded shaft is also provided on the mounting plate of the line-following component. The driving gear is meshingly connected with the driven gear.

[0012] As a further improvement of the utility model, the fixing seat comprises a fixing seat shell which is vertically arranged and has a tubular structure, a fixing plate is horizontally installed on the upper end of the fixing seat shell, and a controller mounting plate and a winding assembly mounting plate are horizontally installed in the fixing seat shell from top to bottom in sequence;

[0013] The controller is arranged on the upper surface of the controller mounting plate, the wire reeling and unreeling mechanism is arranged between the controller mounting plate and the winding assembly mounting plate, the upper edge and the lower edge of the motor mounting plate are fixedly connected to the controller mounting plate and the winding assembly mounting plate respectively, and the winding assembly mounting plates on both sides of the motor mounting plate are provided with wire passages for metal cables to pass through.

[0014] As a further improvement of the utility model, two wiring through-holes corresponding to the controller and the permanent magnet motor respectively are provided on the side wall of the fixed base shell.

[0015] As a further improvement of the utility model, the movable seat includes a vertically arranged movable seat shell with a tubular structure, an alarm mounting plate is horizontally installed on the lower end of the movable seat shell, a pulley block mounting plate is also horizontally installed on the upper inner wall of the movable seat shell, the pulley block mounting frame is arranged on the lower plate surface of the pulley block mounting plate, and two wire passing openings for metal cables to pass through are relatively provided on the pulley block mounting plate.

[0016] As a further improvement of the present invention, an aviation plug male head electrically connected to the alarm is vertically installed between the two wire passing openings, an aviation plug female head mounting plate is horizontally installed on the lower end surface of the fixing seat, and an aviation plug female head mounting plate is vertically provided with an aviation plug female head that quickly fits with the aviation plug male head and is electrically connected to the controller, and the aviation plug female head mounting plates on both sides of the aviation plug female head are provided with wire passing openings for the metal cable to pass through.

[0017] As a further improvement of the present invention, positioning guide columns are vertically provided on the upper surfaces of the pulley assembly mounting plates on both sides of the male aviation plug, and the mounting plate of the female aviation plug is provided with guide sockets that quickly fit with the positioning guide columns.

[0018] As a further improvement of the present invention, a proximity switch electrically connected to the controller is provided on the lower surface of the aviation plug female mounting plate.

[0019] Beneficial effects:

[0020] Compared with the prior art, the advantages of the automatic lifting alarm device of the utility model are:

[0021] The device is installed on the roof of a factory building or workshop through a fixed seat. When the alarm needs to be raised or lowered, the controller in the fixed seat only needs to be used to drive the wire-retracting mechanism to retract or release the metal cable, so that the movable seat suspended under the fixed seat can be raised or lowered, thereby enabling the alarm installed on the movable seat to be automatically raised or lowered. Therefore, compared with the existing fixed alarm, when the device is repaired, there is no need to use an automatic lifting vehicle to arrange manpower for high-altitude operations. The alarm can be automatically raised or lowered by remotely controlling the controller, thereby facilitating maintenance while avoiding the safety hazards caused by manual high-altitude maintenance.

[0022] At the same time, compared with the existing winch-mounted alarm, this device does not need to find space to set up additional winches and pulleys, thus avoiding the impact on the installation layout of the workshop and reducing the use and maintenance costs of the workshop.

[0023] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1This is one of the usage state diagrams of the utility model;

[0026] Figure 2 This is the second usage state diagram of the utility model;

[0027] Figure 3 It is the internal structure diagram of the utility model;

[0028] Figure 4 It is an exploded view of the wire-retracting and -releasing mechanism of the utility model;

[0029] Figure 5 It is an exploded view of the fixing seat of the utility model;

[0030] Figure 6 It is an exploded view of the movable seat of the utility model.

[0031] Among them: 1-fixed seat; 11-fixed plate; 12-controller mounting plate; 13-winding component mounting plate; 14-aviation plug female mounting plate; 15-wiring port tube; 16-fixed seat housing; 2-controller; 3-permanent magnet motor; 31-motor mounting plate; 32-reeling and unwinding winch; 4-line-aligning component mounting plate; 41-driving gear; 42-driven gear; 43-threaded shaft; 44-line-aligning device; 45-guide rod; 5-aviation plug female; 51-proximity switch; 52-guide socket; 6-metal cable; 61-wire port; 7-movable seat; 71-pulley block mounting plate; 72-aviation plug male; 73-positioning guide column; 74-movable seat housing; 75-alarm mounting plate; 8-pulley block; 81-pulley block mounting frame; 9-alarm. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] Example:

[0036] The specific implementation of the utility model is as follows Figure 1-6 As shown, an alarm device capable of automatically rising and falling includes a fixed seat 1 fixed at a gas concentration detection position in a factory or workshop, most of which is on the roof. A movable seat 7 is suspended below the fixed seat 1 through a metal cable 6 that can be retracted and released vertically, and an alarm 9 is fixed on the lower end surface of the movable seat 7. In order to achieve the lifting and lowering of the alarm 9, a retractable wire mechanism for retracting and releasing the metal cable 6 is provided in the fixed seat 1, and a controller 2 capable of controlling the operation of the retractable wire mechanism is also provided in the fixed seat 1. In this embodiment, the rising and falling of the alarm 9 is completed by the retractable wire mechanism, and the height can be customized according to the height of the factory building.

[0037] Before using the device, the fixed seat 1 needs to be fixedly installed on the roof of the factory building or workshop to complete the fixed installation of the entire device. When the alarm 9 needs to be repaired, the remote control unit sends a command to the controller 2, and the controller 2 drives the retractable wire mechanism to lower the metal cable 6, so that the movable seat 7 suspended under the fixed seat and the alarm 9 on the movable seat 7 are lowered to the specified position, and then the alarm 9 is inspected and tested using professional equipment; after the inspection is completed, the remote control unit sends a command to the controller 2 again, and the controller 2 drives the retractable wire mechanism to reel in the metal cable 6, so that the movable seat 7 suspended under the fixed seat and the alarm 9 on the movable seat 7 are raised back to the original position.

[0038] Compared with the existing fixed alarm, this device does not need to use an automatic lifting vehicle to arrange manpower for high-altitude operations during maintenance. The alarm 9 can be automatically lifted and lowered by remotely controlling the controller, which is convenient for maintenance and avoids the potential safety hazards caused by manual high-altitude maintenance. At the same time, compared with the existing winch-mounted alarm, this device does not need to find space to set up additional winches and pulleys, thereby avoiding the impact on the installation layout of the workshop, thereby reducing the use and maintenance costs of the workshop.

[0039] Regarding the wire-reeling mechanism in the device, it includes a motor mounting plate 31 vertically arranged in a fixed seat 1. A wire-reeling capstan 32 capable of vertical rotation is mounted on one side of the motor mounting plate 31, and a permanent magnet motor 3 whose output end is transmission-connected to the rotating axis of the wire-reeling capstan 32 is mounted on the other side. The permanent magnet motor 3 is electrically connected to the controller 2. In this embodiment, the permanent magnet motor 3 adopts a permanent magnet synchronous motor with a built-in reducer, and the controller 2 controls the forward and reverse operation of its output end, thereby realizing the forward and reverse rotation of the wire-reeling capstan 32.

[0040] In coordination therewith, a pulley block mounting frame 81 is provided in the movable seat 7, and a pulley block 8 capable of vertical rotation is provided on the pulley block mounting frame 81. One end of the metal cable 6 is fixedly connected to the retractable winch 32, and the other end is fixedly connected to the fixed seat 1 by passing through the pulley block 8. With such a configuration, the pulley block 8 becomes a movable pulley block, so that it can cooperate with the forward and reverse rotation of the retractable winch 32 to realize the lifting and lowering of the movable seat 7, and then realize the lifting and lowering of the alarm 9. In this embodiment, the free end of the metal cable 6 can be directly fixed to the fixed seat 1 by welding. Of course, in the actual production process, the free end of the metal cable 6 can also be inserted into the fixed seat 1, and fixed to the fixed seat 1 by setting an anti-slip piece on the free end of the metal cable 6. At the same time, the metal cable 6 adopts a stainless steel wire rope with a diameter of 1.2 mm, and its normal load-bearing capacity meets the weight of the alarm 9 and the rear-end accessories. At the same time, during the design, the maximum output torque of the control device is controlled by fully calculating the motor power and the torque control limit mode to prevent the metal cable 6 from being broken due to unexpected circumstances.

[0041] At the same time, in order to guide the smooth retraction and release of the metal cable 6 on the retractable winch 32, the principle of the water drop wheel retractor is adopted, and a line-smoothing component is provided below the retractable winch 32. Specifically: the line-smoothing component includes a threaded shaft 43 extending in the same direction as the rotating shaft of the retractable winch 32, one end of the threaded shaft 43 is rotatably connected to the motor mounting plate 31, and the other end is rotatably connected to a vertically arranged line-smoothing component mounting plate 4. The threaded shaft 43 is provided with a line-smoothing device 44 that cooperates with its thread, and the line-smoothing device 44 is vertically provided with a line-passing channel for the metal cable 6 to pass through on the side away from the threaded shaft 43. Through the rotation of the threaded shaft 43, the line-smoothing device 44 can move axially along the threaded shaft 43 during the retractable and retractable process of the retractable and retractable winch 32, thereby avoiding the phenomenon of collapsed and overlapped wires of the metal cable 6 during the retractable and retractable process, thereby avoiding the occurrence of the retractable and retractable winch 32 being stuck.

[0042] Furthermore, in order to further guide the movement of the line aligner 44, a guide rod 45 extending in the same direction as the threaded shaft 43 and movably passing through the line aligner 44 is provided on one side of the threaded shaft 43, and both ends of the guide rod 45 are respectively connected to the motor mounting plate 31 and the line aligning assembly mounting plate 4.

[0043] In this embodiment, in order to make the axial movement of the line shunter 44 on the threaded shaft 43 synchronously correspond to the process of winding and releasing the line of the winding and releasing winch 32. A driving gear 41 that can rotate axially and whose axis is transmission-connected to the axis of the winding and releasing winch 32 is provided on the line shunting component mounting plate 4. A driven gear 42 that can rotate axially and whose axis is transmission-connected to the end of the threaded shaft 43 is also provided on the line shunting component mounting plate 4. The driving gear 41 is meshedly connected with the driven gear 42. Such a design can make the threaded shaft 43 rotate synchronously with the winding and releasing winch 32, so that the line shunter 44 can synchronously make a reciprocating motion on the threaded shaft 43 during the process of winding and releasing the metal cable 6.

[0044] In the device, regarding the specific structure of the fixed seat 1: the fixed seat 1 includes a fixed seat shell 16 which is vertically arranged and has a tubular structure. A fixed plate 11 is horizontally installed on the upper end of the fixed seat shell 16, and the fixed installation of the fixed seat 1 can be achieved by fixing bolts on the fixed plate 11. In addition, in order to install the remaining components in the fixed seat 1, a controller mounting plate 12 and a winding assembly mounting plate 13 are horizontally installed inside the fixed seat shell 16 from top to bottom. Specifically: the controller 2 is arranged on the upper plate surface of the controller mounting plate 12, and the retractable wire mechanism is arranged between the controller mounting plate 12 and the winding assembly mounting plate 13. The upper edge and the lower edge of the motor mounting plate 31 are fixedly connected to the controller mounting plate 12 and the winding assembly mounting plate 13, respectively, such as by welding. At the same time, in order to avoid blocking the metal cable 6, the winding assembly mounting plates 13 on both sides of the motor mounting plate 31 are provided with wire passages 61 for the metal cable 6 to pass through.

[0045] In this embodiment, in order to connect the controller 2 and the permanent magnet motor 3 to an external power source, two wiring through-holes 15 corresponding to the controller 2 and the permanent magnet motor 3 are provided on the side wall of the fixing base housing 16 .

[0046] In the device, the specific structure of the movable seat 7 is as follows: the movable seat 7 includes a movable seat housing 74 which is vertically arranged and has a tubular structure. An alarm mounting plate 75 is horizontally mounted on the lower end of the movable seat housing 74, and the alarm 9 is fixedly mounted on the alarm mounting plate 75 by bolts. At the same time, a pulley block mounting plate 71 is also horizontally mounted on the upper inner wall of the movable seat housing 74. A pulley block mounting frame 81 is arranged on the lower plate surface of the pulley block mounting plate 71, and two wire passing openings 61 for the metal cable 6 to pass through are arranged on the pulley block mounting plate 71.

[0047] In addition, an aviation plug male head 72 electrically connected to the alarm 9 is vertically installed between the two wire ports 61. An aviation plug female head mounting plate 14 is horizontally installed on the lower end surface of the fixing seat 1, and an aviation plug female head 5 is vertically provided on the aviation plug female head mounting plate 14, which is fast-plugged with the aviation plug male head 72 and electrically connected to the controller 2. With such a design, in conjunction with the power switching switch in the controller 2, the power supply of the permanent magnet motor 3 and the alarm 9 can be interlocked - when the retractable wire mechanism works, that is, when the aviation plug male head 72 and the aviation plug female head 5 are disengaged, the power supply of the alarm 9 is cut off; when the alarm 9 works, that is, when the aviation plug male head 72 and the aviation plug female head 5 are plugged in, the power supply of the retractable wire mechanism is cut off. In this way, the aviation plug male head 72 and the aviation plug female head 5 are without power during the lifting process, and no sparks are generated when the fast-plug aviation plug is disconnected or inserted, thereby improving the safety of the equipment.

[0048] The pins of the aviation plug use gold-plated spring pins and gold-plated contacts to ensure good contact between the aviation plug male head 72 and the aviation plug female head 5. At the same time, double inner and outer silicone sealing rings are provided at the plug connection. The permanent magnet motor 3 adopts a torque control method to ensure that each time the plug is inserted into place, the sealing ring has enough tension to make the plug connection seal well. In addition, the retractable winch 32 in the device uses a flexible pulley mechanism as a transmission link to ensure that after the plug is inserted into the socket, even if the tension is overloaded, the mechanical and electrical interfaces will not be damaged.

[0049] In this embodiment, in order to guide the plug-in fit between the aviation plug male head 72 and the aviation plug female head, positioning guide posts 73 are vertically provided on the upper plate surface of the pulley assembly mounting plate 71 on both sides of the aviation plug male head 72, and the aviation plug female head mounting plate 14 is provided with a guide socket 52 that is quickly plugged with the positioning guide post 73. In addition, in order to avoid blocking the metal cable 6, the aviation plug female head mounting plates 14 on both sides of the aviation plug female head 5 are also provided with a wire passing port 61 for the metal cable 6 to pass through.

[0050] It should be noted that:

[0051] In order to enable the controller 2 to know the distance between the fixed seat 1 and the movable seat 7 in time, a proximity switch 51 electrically connected to the controller 2 is provided on the lower surface of the aviation plug female mounting plate 14 .

[0052] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. An alarm device capable of automatically rising and falling, characterized in that: The invention comprises a fixed seat (1), a movable seat (7) is suspended below the fixed seat (1) via a metal cable (6) capable of being retracted and released vertically, an alarm (9) is fixedly provided on the lower end surface of the movable seat (7), a retractable and releasable wire mechanism for retracting and releasing the metal cable (6) is provided inside the fixed seat (1), and a controller (2) capable of controlling the operation of the retractable and releasable wire mechanism is also provided inside the fixed seat (1).

2. The alarm device capable of automatic lifting and lowering according to claim 1, characterized in that: The retractable wire mechanism comprises a motor mounting plate (31) vertically arranged in a fixing seat (1); a retractable wire winch (32) capable of vertical rotation is mounted on one side of the motor mounting plate (31); and a permanent magnet motor (3) having an output end drivingly connected to a rotating shaft of the retractable wire winch (32) is mounted on the other side of the plate; the permanent magnet motor (3) is electrically connected to a controller (2); A pulley block mounting frame (81) is provided inside the movable seat (7), and a pulley block (8) capable of vertical rotation is provided on the pulley block mounting frame (81). One end of the metal cable (6) is fixedly connected to the reel-and-reel winch (32), and the other end passes around the pulley block (8) and is fixedly connected to the fixed seat (1).

3. The alarm device capable of automatic lifting and lowering according to claim 2, characterized in that: A line-following assembly is provided below the reel-and-reel winch (32), the line-following assembly comprising a threaded shaft (43) extending in the same direction as the rotating shaft of the reel-and-reel winch (32), one end of the threaded shaft (43) being rotatably connected to the motor mounting plate (31), and the other end of the threaded shaft (43) being rotatably connected to a vertically arranged line-following assembly mounting plate (4); The threaded shaft (43) is provided with a wire aligner (44) threadably matched therewith, and a wire passage for a metal cable (6) to pass through is vertically provided on a side of the wire aligner (44) away from the threaded shaft (43), and a guide rod (45) is also provided on one side of the threaded shaft (43) extending in the same direction as the threaded shaft (43) and movably passing through the wire aligner (44), and two ends of the guide rod (45) are respectively connected to the motor mounting plate (31) and the wire aligner assembly mounting plate (4).

4. The alarm device capable of automatic lifting and lowering according to claim 3, characterized in that: The line-following assembly mounting plate (4) is provided with a driving gear (41) which is axially rotatable and whose axis is drivingly connected to the axis of the reeling-and-releasing capstan (32). The line-following assembly mounting plate (4) is also provided with a driven gear (42) which is axially rotatable and whose axis is drivingly connected to the end of the threaded shaft (43). The driving gear (41) is meshingly connected with the driven gear (42).

5. The alarm device capable of automatic lifting and lowering according to claim 2, characterized in that: The fixing seat (1) comprises a fixing seat shell (16) which is vertically arranged and has a tubular structure, a fixing plate (11) being horizontally mounted on the upper end of the fixing seat shell (16), and a controller mounting plate (12) and a winding assembly mounting plate (13) being horizontally mounted in sequence from top to bottom inside the fixing seat shell (16); The controller (2) is arranged on the upper surface of the controller mounting plate (12); the retractable wire mechanism is arranged between the controller mounting plate (12) and the reeling assembly mounting plate (13); the upper edge and the lower edge of the motor mounting plate (31) are fixedly connected to the controller mounting plate (12) and the reeling assembly mounting plate (13), respectively; and the reeling assembly mounting plates (13) on both sides of the motor mounting plate (31) are provided with wire passages (61) for the metal cable (6) to pass through.

6. The alarm device capable of automatic lifting and lowering according to claim 5, characterized in that: Two wiring port pipes (15) corresponding to the controller (2) and the permanent magnet motor (3) are provided on the side wall of the fixing seat housing (16).

7. The alarm device capable of automatic lifting and lowering according to claim 2, 5 or 6, characterized in that: The movable seat (7) comprises a movable seat housing (74) which is vertically arranged and has a tubular structure. An alarm mounting plate (75) is horizontally mounted on the lower end of the movable seat housing (74). A pulley block mounting plate (71) is also horizontally mounted on the upper inner wall of the movable seat housing (74). The pulley block mounting frame (81) is arranged on the lower plate surface of the pulley block mounting plate (71). Two wire passing openings (61) for passing metal cables (6) are arranged opposite to each other on the pulley block mounting plate (71).

8. The alarm device capable of automatic lifting and lowering according to claim 7, characterized in that: An aviation plug male head (72) electrically connected to the alarm (9) is vertically mounted between the two wire passing openings (61); an aviation plug female head mounting plate (14) is horizontally mounted on the lower end surface of the fixing seat (1); and an aviation plug female head (5) which is fast-plugged with the aviation plug male head (72) and electrically connected to the controller (2) is vertically mounted on the aviation plug female head mounting plate (14); and the aviation plug female head mounting plates (14) on both sides of the aviation plug female head (5) are both provided with wire passing openings (61) for the metal cable (6) to pass through.

9. The alarm device capable of automatically rising and falling according to claim 8, characterized in that: Positioning guide columns (73) are vertically provided on the upper plate surfaces of the pulley assembly mounting plates (71) on both sides of the male aviation plug (72), and the female aviation plug mounting plate (14) is provided with guide sockets (52) that quickly fit with the positioning guide columns (73).

10. The alarm device capable of automatic lifting and lowering according to claim 8, characterized in that: A proximity switch (51) electrically connected to the controller (2) is provided on the lower surface of the aviation plug female mounting plate (14).

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