An earthquake early warning system for elevators

Abstract

The present invention relates to the field of earthquake early warning technology, specifically to an earthquake early warning system for elevators, including an earthquake early warning body, a protective base; a buffer protection device; a mechanical alarm device; and an earthquake magnetic early warning device. The present invention breaks through the dilemma of the existing earthquake early warning body over-relying on the external signal structure through geomagnetic early warning, and uses the abnormal magnetic field phenomenon generated during an earthquake to achieve a temporary separation of the magnetic plate. After the magnetic plate is pulled by the elastic force of the spring at its bottom to move toward the convex frame seat, the metal contact plate contacts the metal contact piece, and after the contact, an electric signal is generated by the circuit, and a sound wave alarm is generated in combination with the earthquake magnetic early warning device, and the elevator control linkage module is controlled to perform earthquake early warning. The geomagnetic early warning and the elevator control linkage module are used for double early warning, so as to achieve the effect of improving the accuracy and timeliness of the overall earthquake early warning of the elevator. The protective base is combined with the buffer protection device to achieve the effect of pressure dispersion buffering on the one hand, and automatic mechanical alarm on the other hand.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake early warning, and in particular to an earthquake early warning system for elevators. Background Art

[0002] Earthquakes are caused by sudden ruptures and dislocations of rock masses several kilometers to hundreds of kilometers underground. When an earthquake occurs, the first thing that appears is the P wave that vibrates up and down, with a small amplitude. It takes about 10 seconds to 1 minute for the S wave that moves horizontally to arrive and cause serious damage. Earthquake early warning uses the time difference between the P wave and the S wave after the earthquake. In principle, areas within 50 kilometers of the epicenter will receive early warning information 10 seconds before the earthquake; areas within 90-100 kilometers can receive early warning information more than 20 seconds in advance. According to the data, the magnitude and epicenter of the earthquake can be accurately estimated, and the impact of the earthquake on the early warning target can be quickly estimated. Since the early warning time of an earthquake is short, it is crucial to quickly remind people in the earthquake-affected area. The current earthquake early warning devices usually use text messages or videos to send alarms.

[0003] In order to prevent people in elevators from being unable to save themselves during an earthquake, an earthquake early warning system combined with an elevator system has appeared on the market. By installing an earthquake early warning module in the elevator, the operation of the elevator is controlled by the networking system when an earthquake disaster is sensed, so that people in the elevator can leave and evacuate in time. After searching, an earthquake early warning system for elevators disclosed in Chinese patent publication number CN117775919A and an earthquake early warning system for elevators disclosed in Chinese patent publication number CN113896069A can effectively solve the problem of earthquake early warning for elevators.

[0004] However, since the elevator earthquake early warning system is installed in the form of an integral casing on the inner wall of the elevator during installation, during daily monitoring, there may be problems of human collision, squeezing, and damage to the early warning system inside the elevator. The early warning system does not have corresponding protective measures, which can easily lead to serious damage to the system, thereby affecting the effect of earthquake early warning; and the above-mentioned early warning system is overly dependent on the reception of seismic signals. Once an abnormality occurs in the receiving process, the elevator cannot perform the corresponding early warning work. In view of this, we propose an earthquake early warning system for elevators. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned technology, the present invention provides an earthquake early warning system for elevators, which solves the problems raised in the above-mentioned background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: an earthquake early warning system for elevators, including an earthquake early warning body, on which a protective base is provided; a buffer protection device provided on both sides of the protective base; a mechanical alarm device provided at the rear of the protective base; and an earthquake magnetic early warning device provided in the protective base, wherein the earthquake magnetic early warning device includes a convex frame seat, the convex frame seat is fixed inside the protective base, a metal contact piece is installed on the top of the convex frame seat, a magnetic plate is elastically connected to the convex frame seat through a spring, the top of the magnetic plate is magnetically connected to the inner wall of the convex frame seat, and a metal contact plate is installed on the bottom of the magnetic plate.

[0006] Preferably, the earthquake magnetic early warning device also includes an air pressure plate and a linked alarm device, the surface piston of the air pressure plate is connected to the inner wall of the convex frame seat, a closed thermal induction cavity is formed between the top of the air pressure plate and the inner wall of the convex frame seat, a heating tube is installed in the thermal induction cavity, and a spring is fixedly connected between the bottom of the air pressure plate and the inner wall of the protective base.

[0007] Preferably, the linkage alarm device includes a connecting rod and a limit block, the surface of the connecting rod is rotatably connected to the inside of the protective base, a gear and an extrusion rod are respectively fixedly connected to the connecting rod, and a rack is meshed on the surface of the gear.

[0008] Preferably, the interior of the thermal induction chamber is filled with nitrogen, the bottom of the air pressure plate is fixedly connected to the top of the rack, and the limit block is elastically connected to the interior of the protective base through a spring.

[0009] Preferably, the mechanical alarm device includes an air pressure chamber opened at the rear of the protective base, and a one-way air inlet valve installed at the rear of the protective base, the interior of the air pressure chamber is elastically connected to a passive pressure plate through a spring, the air pressure chamber is connected to a connecting pipe, the bottom end of the connecting pipe is fixedly connected to a whistle shell, the interior of the whistle shell is connected to a whistle ball, and the bottom of the whistle shell is fixedly connected to a horn.

[0010] Preferably, a filter screen is installed at the rear of the protective base at the one-way air inlet valve, the surface of the passive pressure plate is connected to the inner wall piston of the air pressure chamber, and the connecting pipe is fixedly installed on the protective base.

[0011] Preferably, the buffer protection device includes a card block, the surface of the card block is elastically connected to one side of the protection base through a spring, the surface of the card block is slidably connected to a protective sleeve plate, the card block is fixedly connected to an extrusion shaft, and the top of the protective sleeve plate is elastically connected to a card rod through a spring.

[0012] Preferably, the surfaces of the block and the extrusion shaft are respectively slidably connected to the inner wall of the protective base, and a limiting slot is provided on the protective sleeve plate, and the limiting slot is used to limit the block, and the surface of the clamping rod is slidably connected to the inside of the protective sleeve plate, and the protective sleeve plate is sleeved on the protective base.

[0013] Preferably, a convex edge is provided on the top of the protective sleeve, the interior of the protective base is elastically connected to the connecting shaft through a torsion spring, both ends of the connecting shaft are fixedly connected with convex rods, and a push plate is fixedly connected to the connecting shaft, and the push plate is located at the connection between the protective base and the earthquake warning body.

[0014] It can be seen from the above technical solutions that the earthquake early warning system for elevators provided in the embodiments of this specification has at least the following beneficial effects:

[0015] (1) The present invention breaks through the dilemma of the existing earthquake early warning body over-reliance on external signal structure through geomagnetic early warning. Before a large earthquake occurs, the fracture of the crustal rock layer will cause obvious changes in the geomagnetic field. According to many cases before strong earthquakes, the change of the geomagnetic field before the strong earthquake is enough to cause the object adsorbed by the magnet to fall. After falling, the magnetic plate is pulled by the elastic force of the spring at its bottom to move toward the convex frame seat. After moving, the metal contact plate on the magnetic plate contacts the metal contact piece. After contact, an electrical signal is generated by the circuit, which is combined with the earthquake magnetic early warning device to generate a sound wave alarm, control the elevator control linkage module to perform earthquake early warning, and use the geomagnetic early warning and the elevator control linkage module for double warning, so as to achieve the effect of improving the accuracy and timeliness of the overall earthquake early warning of the elevator. The protective base combined with the buffer protection device can achieve the effect of pressure dispersion and buffering on the one hand, and realize automatic mechanical alarm on the other hand.

[0016] (2) In the present invention, when the metal contact plate contacts the metal contact piece, the heating tube is powered on and turns on, and the heating tube heats the nitrogen in the heat sensing chamber. After being heated, the nitrogen produces the effect of thermal expansion and contraction, and generates pressure on the air pressure plate during the expansion period. The expanded nitrogen drives the air pressure plate to drive the rack to move downward. During the downward movement, the rack engages with the gear and drives the extrusion rod on the connecting rod to rotate. When the extrusion rod rotates, the extrusion rod can drive the mechanical alarm device to sound an alarm during the rotation.

[0017] (3) The present invention squeezes the gas inside the air pressure chamber through the movement of the passive pressure plate after being compressed. The high-pressure gas generated after the squeezing moves to the whistle shell through the connecting pipe and flows out through the speaker. The airflow flows through the narrow gap of the whistle shell at high speed, driving the whistle ball to vibrate at high speed in the whistle shell. The resulting airflow turbulence combined with the vibration realizes sound generation. The sound is amplified and flows out through the speaker, generating alarm sound waves, and then realizing an automated mechanical alarm. The mechanical alarm device respectively performs sound wave alarms during earthquakes and when the buffer protection device is squeezed and collided, achieving a warning effect. At the same time, the alarm sound contained in the earthquake early warning body itself is combined with the mechanical whistle sound alarm to achieve a double volume alarm effect.

[0018] (4) The present invention adopts a buffering and protective device. When the protective sleeve is squeezed, on the one hand, the protective sleeve will apply pressure to the spring on the block through each block, thereby achieving a pressure dispersion and buffering effect, thereby achieving a buffering and protective effect on the protective base as a whole. On the other hand, the squeezed block drives the squeezing axis to move toward the passive pressure plate, thereby producing a squeezing effect on the passive pressure plate during movement. The passive pressure plate squeezes the gas inside the air pressure chamber while moving in the air pressure chamber. The high-pressure gas generated after squeezing moves to the whistle shell through the connecting pipe and flows out through the speaker, thereby generating an alarm sound wave, thereby realizing an automated mechanical alarm, thereby achieving an effect of warning people in the elevator of collision problems, thereby realizing an automatic alarm function after a collision.

[0019] (5) In the present invention, when the protective sleeve moves downward away from the protective base, the convex edge contacts and squeezes the convex rod. The convex edge squeezes the convex rod and drives the push plate to rotate through the connecting shaft. The push plate can achieve the effect of ejecting the earthquake warning body while rotating with the connecting shaft circle as the center point, thereby facilitating the operator to carry out inspection work on the earthquake warning body after disassembly, thereby achieving the effect of quickly detecting the earthquake warning body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the protective base in the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the earthquake magnetic early warning device in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the connecting rod in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the rack in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the limit block in the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the whistle shell in the present invention;

[0028] Figure 8 This is a schematic diagram of the rear structure of the protective base in the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the card block in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the protective sleeve plate in the present invention;

[0031] Fig.11 It is a structural schematic diagram of the clamping rod in the present invention;

[0032] Fig.12 It is a schematic diagram of the structure of the connecting shaft in the present invention;

[0033] Fig.13 It is a schematic diagram of the protective base structure in the present invention.

[0034] In the figure: 1. Earthquake early warning body; 2. Protection base; 3. Buffer protection device; 31. Block; 32. Protection sleeve; 33. Extrusion shaft; 34. Clamp rod; 35. Limiting slot; 4. Mechanical alarm device; 41. Air pressure chamber; 42. Passive pressure plate; 43. Connecting pipe; 44. Whistle shell; 45. Whistle ball; 46. Speaker; 47. One-way air intake valve; 48. Filter; 5. Earthquake magnetic early warning device; 51. Convex frame seat; 52. Metal contact piece; 53. Magnetic plate; 54. Metal touch plate; 55. Air pressure plate; 56. Thermal sensing chamber; 57. Heating tube; 58. Linked alarm device; 581. Connecting rod; 582. Gear; 583. Extrusion rod; 584. Rack; 585. Limiting block; 6. Connecting shaft; 7. Convex rod; 8. Push plate; 9. Convex edge. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1 - Fig.13As shown, an earthquake early warning system for elevators includes an earthquake early warning body 1, in which an elevator control linkage module is arranged. The core function of the module is to quickly and safely transfer passengers in the elevator to the nearest floor and stop all non-essential operations of the elevator after receiving an earthquake early warning signal. The specific structure has been disclosed in an earthquake early warning system for elevators disclosed in Chinese patent publication number CN117775919A. A protective base 2 is arranged on the earthquake early warning body 1, and the earthquake early warning body 1 is stuck in the cavity of the protective base 2 to enter Fixed monitoring; buffer protection devices 3 are arranged on both sides of the protection base 2; a mechanical alarm device 4 is arranged at the rear of the protection base 2; and an earthquake magnetic early warning device 5 is arranged in the protection base 2, the earthquake magnetic early warning device 5 includes a convex frame seat 51, the convex frame seat 51 is fixed to the inside of the protection base 2, a metal contact piece 52 is installed on the top of the convex frame seat 51, a magnetic plate 53 is elastically connected to the convex frame seat 51 through a spring, the top of the magnetic plate 53 is magnetically connected to the inner wall of the convex frame seat 51, and a metal contact plate 54 is installed on the bottom of the magnetic plate 53. Before a large earthquake occurs, the fracture of the earth's crust and rock layers will cause obvious changes in the geomagnetic field. According to many cases before strong earthquakes, the changes in the geomagnetic field before a strong earthquake are enough to cause the object attracted by the magnet to fall. After falling, the magnetic plate 53 is pulled by the elastic force of the spring at its bottom to move toward the convex frame seat 51. After moving, the metal contact plate 54 on the magnetic plate 53 contacts the metal contact piece 52, and after contact, an electric current is generated to form an electrical signal, which is sent to the elevator control linkage module for earthquake early warning. The geomagnetic early warning and the elevator control linkage module are used for double early warning, so as to improve the accuracy and timeliness of the overall earthquake early warning of the elevator.

[0037] In this embodiment, the earthquake magnetic early warning device 5 also includes an air pressure plate 55 and a linkage alarm device 58. The surface piston of the air pressure plate 55 is connected to the inner wall of the convex frame seat 51. A closed thermal sensing chamber 56 is formed between the top of the air pressure plate 55 and the inner wall of the convex frame seat 51. The interior of the thermal sensing chamber 56 is filled with nitrogen. Nitrogen has a large relative molecular mass, a small diffusion coefficient, a relatively high column efficiency, is safe, and is cheap. It has high safety performance while achieving the effect of thermal expansion and contraction, and then achieves the effect of converting thermal energy into kinetic energy. A heating tube 57 is installed in the thermal sensing chamber 56. A spring is fixedly connected between the bottom of the air pressure plate 55 and the inner wall of the protective base 2. When the metal contact plate 54 contacts the metal contact sheet 52, the heating tube 57 is powered on and turned on. The heating tube 57 heats the nitrogen in the thermal sensing chamber 56. After heating, the nitrogen produces the effect of thermal expansion and contraction, and generates pressure on the air pressure plate 55 during the expansion period. The expanded nitrogen drives the air pressure plate 55 to drive the linkage alarm device 58 to drive the mechanical alarm device 4 to perform a sonic alarm.

[0038] Furthermore, the linkage alarm device 58 includes a connecting rod 581, the surface of the connecting rod 581 is rotatably connected to the inside of the protective base 2, and the left and right sides of the inside of the protective base 2 are slidably connected to the limit block 585, and the limit block 585 is fixedly connected to a spring (such as Figure 6 As shown), the limit block 585 is elastically connected to the inside of the protective base 2 through the spring (as shown Figure 3 As shown in the figure, the limit block 585 is used to limit the magnetic plate 53 in one direction after it falls. When the magnetic plate 53 falls downward, it will squeeze the inclined surface of the limit block 585. The inclined surface of the limit block 585 elastically gives way after being stressed. The limit blocks 585 on both sides of the protective base 2 are retracted into the protective base 2. When the magnetic plate 53 moves downward and away from the limit block 585, the limit block 585 loses its squeezing effect. At this time, the limit block 585 is reset and ejected under the influence of the spring force on it. The bottom plane of the limit block 585 at the rear limits the height of the magnetic plate 53 to prevent the magnetic plate 53 from being separated from the connection with the metal contact piece 52 due to an earthquake, and also helps the magnetic plate 53 to be stably connected with the metal contact piece 52. The connecting rod 581 is respectively fixedly connected with a gear 582 and an extrusion rod 583. The surface of the gear 582 is meshed with a rack 584. The top of the rack 584 is fixedly connected to the bottom of the air pressure plate 55. The extrusion rod 583 and the rack 584 are in a parallel state under normal conditions (such as Figure 3 , Figure 4 As shown in the figure, when the rack 584 drives the gear 582 to rotate by the moving force, the extrusion rod 583 rotates synchronously with the connecting rod 581, and the expanded nitrogen drives the air pressure plate 55 to drive the rack 584 to move downward. During the downward movement, the rack 584 engages the gear 582 and drives the extrusion rod 583 on the connecting rod 581 to rotate. When the extrusion rod 583 rotates, the extrusion rod 583 can drive the mechanical alarm device 4 to sound an alarm during the rotation.

[0039] Furthermore, the mechanical alarm device 4 includes an air pressure chamber 41 opened at the rear of the protective base 2, and a one-way air intake valve 47 installed at the rear of the protective base 2. The interior of the air pressure chamber 41 is elastically connected to a passive pressure plate 42 through a spring. The one-way air intake valve 47 is used to provide one-way air replenishment in the air pressure chamber 41. Combined with the spring on the passive pressure plate 42, it can facilitate repeated movement of the passive pressure plate 42. The air pressure chamber 41 is connected to a connecting pipe 43, and the bottom end of the connecting pipe 43 is fixedly connected to a whistle shell 44, the interior of the whistle shell 44 is connected to a whistle ball 45, and the bottom of the whistle shell 44 is fixedly connected to a speaker 46. When the passive pressure plate 42 is pressed and moves in the air pressure chamber 41, the passive pressure plate 42 will squeeze the gas inside the air pressure chamber 41. The high-pressure gas generated after squeezing moves to the whistle shell 44 through the connecting pipe 43 and flows out through the speaker 46. The airflow flows through the narrow gap of the whistle shell 44 at high speed, driving the whistle ball 45 to vibrate at high speed in the whistle shell 44. The resulting airflow turbulence combined with the vibration realizes sound generation. The sound is expanded and flows out through the speaker 46, generating alarm sound waves, and then realizing an automated mechanical alarm. The mechanical alarm device 4 respectively performs sound wave alarms during earthquakes and when the buffer protection device 3 is squeezed and collided, achieving a warning effect. At the same time, the alarm sound contained in the earthquake early warning body 1 itself is combined with the mechanical whistle sound alarm to achieve a double volume alarm effect.

[0040] It is worth noting that a filter screen 48 is installed at the rear of the protective base 2 at the one-way air inlet valve 47. The filter screen 48 is used to filter the gas entering the protective base 2 through the one-way air inlet valve 47. The surface of the passive pressure plate 42 is connected to the inner wall piston of the air pressure chamber 41, and the connecting pipe 43 is fixedly installed on the protective base 2.

[0041] It is worth noting that the buffer protection device 3 includes a convex block 31, the surface of the block 31 is elastically connected to one side of the protection base 2 through a spring, and the protection base 2 is provided with a slide groove (such as Figure 2 , Fig.13 As shown, a telescopic plate (such as Fig. 9As shown in the figure, the telescopic plate is used to close and protect the spring in the slide groove, and at the same time, it can ensure the movement of the card block 31. The surface of the card block 31 is slidably connected with a protective sleeve plate 32, and the protective sleeve plate 32 can be slidably sleeved on the protective base 2. A limited card slot 35 is provided on the protective sleeve plate 32, and the limited card slot 35 is used to limit the card block 31. The limited card slot 35 is composed of a plurality of transverse grooves and a vertical groove that penetrates the plurality of transverse grooves. When the card block 31 is located at the transverse groove, it can limit the height of the protective sleeve plate 32. The card block 31 The protective sleeve 32 has a positioning effect. On the other hand, the protective sleeve 32 has a buffering and decompression effect in combination with the spring. The block 31 is fixedly connected with an extrusion shaft 33. The surfaces of the block 31 and the extrusion shaft 33 are respectively slidably connected to the inner wall of the protective base 2. The extrusion shaft 33 is slidably connected in the protective base 2. The top of the protective sleeve 32 is elastically connected with a clamping rod 34 through a spring. The surface of the clamping rod 34 is slidably connected to the inside of the protective sleeve 32. The clamping rod 34 can limit the highest position of the block 31 (such as Fig.11 As shown in the figure, the top of the limiting slot 35 and the clamping rod 34 form a closed state, so that the height of the clamping block 31 is consistent with that of the protective sleeve 32, so that the protective sleeve 32 is stably mounted on the protective base 2. At the same time, the clamping rod 34 can elastically give way after being subjected to force. After giving way, the clamping rod 34 loses its limiting effect on the top clamping block 31, and the top of the limiting slot 35 forms an open state. At this time, the protective sleeve 32 can achieve the effect of moving downward on the clamping block 31. When the protective sleeve 32 is squeezed, on the one hand, the protective sleeve 32 will apply pressure to the spring on the block 31 through each block 31, thereby achieving a pressure dispersion and buffering effect, thereby achieving a buffering and protection effect on the protective base 2 as a whole. On the other hand, the squeezed block 31 drives the extrusion shaft 33 to move toward the passive pressure plate 42, thereby producing an extrusion effect on the passive pressure plate 42 during the movement. The passive pressure plate 42 squeezes the gas inside the air pressure chamber 41 while moving in the air pressure chamber 41. The high-pressure gas generated after the extrusion moves to the whistle shell 44 through the connecting pipe 43, and flows out through the speaker 46, thereby generating an alarm sound wave, thereby realizing an automated mechanical alarm, thereby achieving the effect of warning people in the elevator of collision problems, and realizing an automatic alarm function after a collision.

[0042] In addition, the top sides of the protective sleeve plate 32 are provided with convex edges 9 (such as Fig.11As shown), the interior of the protective base 2 is elastically connected to the connecting shaft 6 through a torsion spring, and both ends of the connecting shaft 6 are fixedly connected with a convex rod 7, and a push plate 8 is fixedly connected to the connecting shaft 6. The push plate 8 is located at the connection between the protective base 2 and the earthquake early warning body 1. When the protective sleeve 32 moves downward after moving away from the protective base 2, it will contact and squeeze the convex rod 7 through the convex edge 9. The convex edge 9 squeezes the convex rod 7 and drives the push plate 8 to rotate through the connecting shaft 6. The push plate 8 achieves the effect of ejecting the earthquake early warning body 1 while rotating with the connecting shaft 6 as the center point, which makes it convenient for the operator to perform inspection work on the earthquake early warning body 1 after disassembly, thereby achieving the effect of quickly detecting the earthquake early warning body 1.

[0043] When the earthquake early warning system for elevators of the present invention is used, an elevator control linkage module is arranged in the earthquake early warning body 1. The core function of the module is to quickly and safely transfer the passengers in the elevator to the nearest floor and stop all unnecessary operations of the elevator after receiving the earthquake early warning signal. The specific structure has been disclosed in an earthquake early warning system for elevators disclosed in China Patent Publication No. CN117775919A. The protective base 2 is installed on the button wall of the elevator by bolts. The earthquake early warning body 1 performs earthquake early warning on the elevator. On the one hand, the elevator control linkage module receives the signal for early warning. On the other hand, according to the results of the analysis of geomagnetic records in the prior art, strong geomagnetic anomalies before major earthquakes occur repeatedly. In the extreme earthquake zone near the epicenter, 36 hours to more than ten minutes before the earthquake, the extremely large anomaly value of the geomagnetic field increases with the increase of the magnitude. Calculated to 1km from the epicenter, the magnetic field anomaly value of the destructive earthquake of Ms=6.0~9.5 is about 102~105nT, and the anomaly intensity even exceeds the magnitude of the earth's magnetic field by 5.5×104nT. According to its intensity characteristics and temporal and spatial distribution, this ULF magnetic field anomaly near the epicenter before the earthquake manifests itself as a magnetic gap eruption. Based on the characteristics of the geomagnetic anomaly, the short-term geomagnetic anomaly before a major earthquake in the prior art is used as an early warning signal for earthquake prevention and early warning in the elevator earthquake early warning system, and the geomagnetic early warning breaks through the dilemma of the existing earthquake early warning body 1 over-relying on the external signal structure.That is, before a large earthquake arrives, the fracture of the earth's crust and rock layers will cause obvious changes in the geomagnetic field. According to many cases before strong earthquakes, the change of the geomagnetic field before a strong earthquake is enough to cause the object attracted by the magnet to fall. After falling, the magnetic plate 53 is pulled by the elastic force of the spring at its bottom to move toward the convex frame seat 51. After moving, the metal contact plate 54 on the magnetic plate 53 contacts the metal contact piece 52. After contact, current is generated to form an electrical signal, which is sent to the elevator control linkage module for earthquake early warning. At the same time, when the metal contact plate 54 contacts the metal contact piece 52, the heating tube 57 is energized and turned on. The heating tube 57 heats the nitrogen in the thermal sensing cavity 56. After heating, the nitrogen produces the effect of thermal expansion and contraction. During the expansion period, pressure is generated on the air pressure plate 55. The expanded nitrogen drives the air pressure plate 55 to drive the rack 584 to move downward. During the downward movement, the rack 584 meshes with the gear 582 and drives the extrusion rod 583 on the connecting rod 581 to rotate. Under normal conditions, the extrusion rod 583 and the connecting rod 583 are connected. The passive pressure plate 42 is in a parallel state. When the squeezing rod 583 rotates, the squeezing rod 583 can squeeze the passive pressure plate 42 to move toward the connecting pipe 43 during the rotation. The passive pressure plate 42 squeezes the gas inside the air pressure chamber 41 while moving in the air pressure chamber 41. The high-pressure gas generated after the squeezing moves to the whistle shell 44 through the connecting pipe 43 and flows out through the speaker 46. The airflow flows through the narrow gap of the whistle shell 44 at a high speed, driving the whistle ball 45 to vibrate at a high speed in the whistle shell 44. The resulting airflow turbulence combined with the vibration realizes sound generation. The sound is amplified and flows out through the speaker 46 to generate an alarm sound wave, thereby realizing an automated mechanical alarm to achieve the effect of warning people in the elevator of the earthquake situation. The technical solution uses the geomagnetic early warning and the elevator control linkage module for dual early warning, thereby improving the accuracy and timeliness of the overall earthquake early warning of the elevator. At the same time, the alarm sound contained in the earthquake early warning body 1 is combined with the mechanical whistle alarm to achieve the effect of a dual volume alarm.

[0044] When the earthquake early warning body 1 is performing normal monitoring, if the personnel in the elevator accidentally or intentionally collides with or squeezes the protective base 2, the protective sleeve 32 protects the earthquake early warning body 1 in the protective base 2. When the protective sleeve 32 is subjected to pressure, on the one hand, the protective sleeve 32 will apply pressure to the spring on the card block 31 through each card block 31, thereby achieving the effect of pressure dispersion and buffering, thereby achieving the effect of buffering and protecting the protective base 2 as a whole. On the other hand, the squeezed card block 31 drives the squeezing shaft 33 to move toward the passive pressure plate 42, thereby squeezing the passive pressure plate 42 during the movement. While the passive pressure plate 42 moves in the air pressure chamber 41, it squeezes the gas inside the air pressure chamber 41. The high-pressure gas generated after the squeezing moves to the whistle shell 44 through the connecting pipe 43, and flows out through the speaker 46, thereby generating an alarm sound wave, thereby realizing an automated mechanical alarm, thereby achieving the effect of warning the personnel in the elevator of the collision problem, thereby realizing the automatic alarm function after the collision.

[0045] When it is necessary to conduct regular inspection of the earthquake warning body 1, the operator moves the card rod 34 so that the card rod 34 is away from the card block 31. After moving away, the card rod 34 loses the effect of limiting the top of the limit slot 35, and continues to move the card rod 34 so that the card rod 34 drives the protective sleeve 32 to move. After the movement, the card block 31 originally located in the horizontal groove of the limit slot 35 is located in the vertical groove of the limit slot 35. At this time, the card rod 34 can be directly pressed down to drive the protective sleeve 32 to move downward on the protective base 2 as a whole. During the downward movement, the protective sleeve 32 The sleeve 32 gradually moves away from the earthquake warning body 1, and the earthquake warning body 1 is gradually exposed. When the protective sleeve 32 continues to move downward and away from the earthquake warning body 1, the continued downward movement of the protective sleeve 32 will contact the convex rod 7 through the convex edge 9, and the convex edge 9 will squeeze the convex rod 7 and drive the push plate 8 to rotate through the connecting shaft 6. The push plate 8 can achieve the effect of ejecting the earthquake warning body 1 while rotating with the connecting shaft 6 as the center point, which makes it convenient for the operator to carry out the inspection of the earthquake warning body 1 after disassembly, thereby achieving the effect of quickly earthquake warning body 1.

[0046] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not limitations of the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present invention. The patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. An earthquake early warning system for elevators, characterized in that: include An earthquake early warning machine body (1), wherein a protective base (2) is provided on the earthquake early warning machine body (1); Buffer protection devices (3) arranged on both sides of the protection base (2); A mechanical alarm device (4) arranged at the rear of the protective base (2); and an earthquake magnetic early warning device (5) arranged in a protective base (2), the earthquake magnetic early warning device (5) comprising a convex frame seat (51), the convex frame seat (51) being fixed inside the protective base (2), a metal contact piece (52) being installed on the top of the convex frame seat (51), a magnetic plate (53) being elastically connected to the convex frame seat (51) via a spring, the top of the magnetic plate (53) being magnetically connected to the inner wall of the convex frame seat (51), and a metal contact plate (54) being installed on the bottom of the magnetic plate (53); The earthquake magnetic early warning device (5) also includes an air pressure plate (55) and a linkage alarm device (58), wherein a surface piston of the air pressure plate (55) is connected to the inner wall of the convex frame seat (51), a closed thermal sensing cavity (56) is formed between the top of the air pressure plate (55) and the inner wall of the convex frame seat (51), a heating tube (57) is installed in the thermal sensing cavity (56), and a spring is fixedly connected between the bottom of the air pressure plate (55) and the inner wall of the protective base (2); The linked alarm device (58) comprises a connecting rod (581) and a limit block (585); the surface of the connecting rod (581) is rotatably connected to the inside of the protective base (2); a gear (582) and an extrusion rod (583) are respectively fixedly connected to the connecting rod (581); and a rack (584) is meshed on the surface of the gear (582); The interior of the thermal sensing chamber (56) is filled with nitrogen, the bottom of the air pressure plate (55) is fixedly connected to the top of the rack (584), and the limit block (585) is elastically connected to the interior of the protective base (2) via a spring; The mechanical alarm device (4) comprises an air pressure chamber (41) opened at the rear of the protective base (2), and a one-way air inlet valve (47) installed at the rear of the protective base (2); the interior of the air pressure chamber (41) is elastically connected to a passive pressure plate (42) via a spring; the air pressure chamber (41) is connected to a connecting pipe (43); the bottom end of the connecting pipe (43) is fixedly connected to a whistle shell (44); the interior of the whistle shell (44) is connected to a whistle ball (45); and the bottom of the whistle shell (44) is fixedly connected to a speaker (46).

2. The earthquake early warning system for elevators according to claim 1, characterized in that: A filter screen (48) is installed at the rear of the protective base (2) at the one-way air inlet valve (47), the surface of the passive pressure plate (42) is connected to the inner wall piston of the air pressure chamber (41), and the connecting pipe (43) is fixedly installed on the protective base (2).

3. The earthquake early warning system for elevators according to claim 1, characterized in that: The buffer protection device (3) comprises a clamping block (31), the surface of the clamping block (31) being elastically connected to one side of the protection base (2) via a spring, the surface of the clamping block (31) being slidably connected to a protection sleeve plate (32), the clamping block (31) being fixedly connected to an extrusion shaft (33), and the top of the protection sleeve plate (32) being elastically connected to a clamping rod (34) via a spring.

4. An earthquake early warning system for elevators according to claim 3, characterized in that: The surfaces of the clamping block (31) and the extrusion shaft (33) are respectively slidably connected to the inner wall of the protective base (2); a limit clamping groove (35) is provided on the protective sleeve (32); the limit clamping groove (35) is used to limit the clamping block (31); the surface of the clamping rod (34) is slidably connected to the inside of the protective sleeve (32); and the protective sleeve (32) is sleeved on the protective base (2).

5. The earthquake early warning system for elevators according to claim 3, characterized in that: The top of the protective sleeve (32) is provided with a convex edge (9), the interior of the protective base (2) is elastically connected to the connecting shaft (6) via a torsion spring, both ends of the connecting shaft (6) are fixedly connected to convex rods (7), and the connecting shaft (6) is fixedly connected to a push plate (8), and the push plate (8) is located at the connection between the protective base (2) and the earthquake early warning body (1).

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