Elevator protection device

Abstract

The utility model relates to an elevator protection device which comprises an electromagnetic valve control mechanism and an abnormal control mechanism connected with the electromagnetic valve control mechanism, the electromagnetic valve control mechanism is electrically connected with an elevator controller, and the abnormal control mechanism is connected with a steel rope on the top of an elevator car. The electromagnetic valve control mechanism comprises an electromagnetic valve assembly and a drag hook plate connected with the electromagnetic valve assembly, the abnormity control mechanism comprises a rotary disc mechanism and a swing mechanism connected with the rotary disc mechanism, the outer end of the drag hook plate is connected with the outer end of the swing mechanism, and the rotary disc mechanism is connected with the steel rope. The electromagnetic valve control mechanism is simple in structure, safe and reliable in performance, rapid in resetting, small in size, convenient to install and low in cost. According to the scheme, the abnormity control mechanism is compact and reasonable in structure and can be shared in the two abnormal states of accidental movement and abnormal speed increase of the elevator, space is saved, and equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator production and manufacturing, in particular to an elevator protection device. Background Art

[0002] Elevators are widely used. For the safety of elevators, they are equipped with safety protection devices when the elevator moves unexpectedly (i.e., when the elevator car door is opened, if the elevator leaves the leveling area, it is defined as accidental movement). However, the existing elevator accidental movement safety protection device adopts a magnetic adsorption structure, which requires the two adsorbed planes to be parallel and flat, otherwise the adsorption force is greatly affected, and the resetting requires external force to pull the suction plate to make it adsorbed, which has a complex structure and is inconvenient to use.

[0003] In order to solve the above technical problems, this solution proposes an elevator protection device. Utility Model Content

[0004] The invention of the utility model aims to solve the problems of the existing magnetic adsorption safety protection device, which requires high parallelism and flatness of the two adsorbed planes, requires external force to pull the suction plate to make it adsorbed, has a complex structure and is inconvenient to use. The specific solution is as follows:

[0005] An elevator protection device includes a solenoid valve control mechanism and an abnormal control mechanism connected to the solenoid valve control mechanism, the solenoid valve control mechanism is electrically connected to an elevator controller, the abnormal control mechanism is connected to a steel rope on the top of an elevator car, the solenoid valve control mechanism includes a solenoid valve assembly and a hook plate connected to the solenoid valve assembly, the abnormal control mechanism includes a turntable mechanism and a swing mechanism connected to the turntable mechanism, the outer end of the hook plate is connected to the outer end of the swing mechanism, and the turntable mechanism is connected to the steel rope.

[0006] Furthermore, the solenoid valve assembly includes a mounting cover plate, a solenoid valve fixedly connected to the inner side of the mounting cover plate via a shock-absorbing pad and fasteners, and a housing connected to the mounting cover plate.

[0007] Furthermore, the expansion piece of the solenoid valve faces downward and is fixedly connected to the plate portion of the hook plate by bolts and nuts.

[0008] Furthermore, the plate portion of the hook plate extends out of the bottom slot of the shell.

[0009] Furthermore, the connection terminal of the solenoid valve is led out from the lead elbow through a wire.

[0010] Furthermore, the turntable mechanism includes a turntable frame, a rotating shaft arranged in the turntable frame, a winding drum arranged on the rotating shaft, a cam arranged on one side of the winding drum, and a hexagonal wheel arranged on the other side of the winding drum, the cam is provided with evenly spaced sector teeth, grooves are provided between the sector teeth, and the steel rope is wound around the winding drum.

[0011] Furthermore, the swing mechanism is arranged on the upper part of the turntable frame, including a swing shaft and a swing rod assembly arranged on the swing shaft, the swing rod assembly includes an inner swing rod, an outer swing rod, a trigger column, a jumping wheel, a tension spring, and a trigger switch, and the trigger switch is electrically connected to the elevator controller.

[0012] Furthermore, the outer end of the inner swing arm is connected to the jumping shaft of the jumping wheel, the wheel edge of the jumping wheel rotates around the wheel edge of the regular hexagonal wheel, the middle part of the inner swing arm is connected to the upper end of the tension spring, and the lower end of the tension spring is fixed to the tension spring fixing block on one side of the turntable frame.

[0013] Furthermore, an inverted fan-shaped hook block is provided on the lower side of the outer swing rod, and the upper side of the outer swing rod is close to the upper end hook portion of the L-shaped rod of the hook plate. Under abnormal conditions, the inverted fan-shaped hook block enters the groove and hooks with the fan-shaped teeth, thereby preventing the winding drum from rotating.

[0014] Furthermore, the inner end of the trigger column is connected to the connecting part of the inner swing rod and the outer swing rod through a connecting block, and the outer end of the trigger column passes through the arc-shaped slot of the turntable frame. The trigger switch is arranged on one side of the arc-shaped slot. In an abnormal state, the outer end of the trigger column contacts the trigger switch.

[0015] In summary, the technical solution of the utility model has the following beneficial effects:

[0016] The elevator protection device of this solution can effectively and safely protect the elevator in two abnormal conditions: accidental movement of the elevator and abnormal increase in speed. The solenoid valve control mechanism of this solution has a simple structure, safe and reliable performance, quick reset, small size, easy installation, and low cost. The abnormal control mechanism of this solution has a compact and reasonable structure and can be shared in two abnormal conditions: accidental movement of the elevator and abnormal increase in speed, saving space and reducing equipment costs. In an abnormal state, this solution can not only immediately stop the elevator operation to protect personal safety, but also immediately cut off the power supply to the motor to stop the motor from rotating and protect the motor from damage. The tension spring of the abnormal control mechanism structure of this solution plays a role of rapid reset, so that this solution can immediately resume normal operation after the fault is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for the description of the embodiment of the utility model. Obviously, the drawings described below are only part of the embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 This is a structural diagram of an elevator protection device of the utility model;

[0019] Figure 2 It is an assembly diagram of the solenoid valve control mechanism and the abnormality control mechanism of the utility model;

[0020] Figure 3 It is a structural diagram of the solenoid valve control mechanism of the utility model;

[0021] Figure 4 This is an exploded view of the solenoid valve control mechanism of the utility model;

[0022] Figure 5 This is a structural diagram of the solenoid valve of the utility model;

[0023] Figure 6 It is a structural diagram of the abnormal control mechanism of the utility model;

[0024] Figure 7 for Figure 6 Schematic diagram of the structure on the other side.

[0025] Description of Figure Numbers:

[0026] 100-solenoid valve control mechanism, 110-solenoid valve assembly, 111-installation cover, 112-shockproof pad, 113-fastener, 114-solenoid valve, 1141-terminal, 1142-expansion piece, 115-housing, 116-lead elbow, 117-bolt, 118-nut, 119-washer, 120-hook plate, 121-hook part, 122-screw, 123-spring washer, 200-abnormal control mechanism, 210-turntable mechanism, 211-turntable Frame, 2111-arc notch, 212-winding disk, 213-cam, 2131-sector-shaped teeth, 2132-groove, 214-regular hexagonal wheel, 215-rotating shaft, 220-swinging mechanism, 221-swing shaft, 222-inner swing rod, 223-outer swing rod, 224-trigger column, 225-jumping wheel, 226-tension spring, 227-trigger switch, 228-jumping shaft, 229-tension spring fixing block, 230-inverted sector-shaped hook block, 231-connecting block, 232-connecting part. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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 creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 7 As shown, an elevator protection device includes a solenoid valve control mechanism 100, and an abnormal control mechanism 200 connected to the solenoid valve control mechanism 100, the solenoid valve control mechanism 100 is electrically connected to the elevator controller (not shown in the figure, belongs to the prior art, and its specific model and working principle are not described in detail here), the abnormal control mechanism 200 is connected to the steel rope on the top of the elevator car (not shown in the figure), the solenoid valve control mechanism 100 includes a solenoid valve assembly 110 and a hook plate 120 connected to the solenoid valve assembly 110, the abnormal control mechanism 200 includes a turntable mechanism 210 and a swing mechanism 220 connected to the turntable mechanism 210, the outer end of the hook plate 120 is connected to the outer end of the swing mechanism 220, and the turntable mechanism 210 is connected to the steel rope.

[0029] Specifically, the solenoid valve assembly 110 includes a mounting cover plate 111, a solenoid valve 114 fixedly connected to the inner side of the mounting cover plate 111 through a shockproof pad 112 (preferably a rubber shockproof pad) and a fastener 113, and a housing 115 connected to the mounting cover plate 111. The terminal 1141 of the solenoid valve 114 is led out from the lead elbow 116 through a wire (not shown in the figure) and is electrically connected to the elevator controller. The mounting cover plate 111 is fixed to the turntable frame 211 through screws 122 and spring washers 123, completing the assembly of the solenoid valve control mechanism 100 and the abnormal control mechanism 200.

[0030] Specifically, the expansion piece 1142 of the solenoid valve 114 faces downward, and is fixedly connected to the plate portion of the hook plate 120 via the bolt 117 and the nut 118 (washer 119).

[0031] Specifically, the plate portion of the hook plate 120 extends out of the bottom slot (not shown) of the housing 115 .

[0032] Specifically, the turntable mechanism 210 includes (two) turntable frames 211, a rotating shaft 215 arranged in the turntable frames 211, a winding drum 212 arranged on the rotating shaft, a cam 213 arranged on one side of the winding drum, and a hexagonal wheel 214 arranged on the other side of the winding drum 212. The cam 213 is provided with evenly spaced sector teeth 2131, and grooves 2132 are provided between the sector teeth 2131. A steel rope is wound around the winding drum 212.

[0033] Specifically, the swing mechanism 220 is arranged on the upper part of the turntable frame 211, including a swing shaft 221 and a swing rod assembly arranged on the swing shaft 221. The swing rod assembly includes an inner swing rod 222, an outer swing rod 223, a trigger column 224, a jumping wheel 225, a tension spring 226, and a trigger switch 227. The trigger switch 227 is electrically connected to the elevator controller.

[0034] Specifically, the outer end of the inner rocker arm 222 is connected to the jumping shaft 228 of the jumping wheel 225, the wheel edge of the jumping wheel 225 rotates around the wheel edge of the regular hexagonal wheel 214, the middle part of the inner rocker arm 222 is connected to the upper end of the tension spring 226, and the lower end of the tension spring 226 is fixed to the tension spring fixing block 229 on one side of the turntable frame 211.

[0035] Specifically, an inverted fan-shaped hook block 230 is provided on the lower side of the outer swing rod 223, and the upper side of the outer swing rod 223 is close to the upper end hook portion 121 of the L-shaped rod of the hook plate 120. Under abnormal conditions, the inverted fan-shaped hook block 230 enters the groove 2132 and hooks with the fan-shaped teeth 2131, thereby preventing the winding drum 212 from rotating.

[0036] Specifically, the inner end of the trigger column 224 is connected to the connecting part 232 of the inner swing rod 222 and the outer swing rod 223 through the connecting block 231, and the outer end of the trigger column 224 passes through the arc-shaped slot 2111 of the turntable frame 211, and the trigger switch 227 is arranged on one side of the arc-shaped slot 2111. In an abnormal state, the outer end of the trigger column 224 contacts the trigger switch 227 to generate a trigger signal, which is sent to the elevator controller.

[0037] The working process of this program is briefly described as follows:

[0038] (1) When the elevator moves unexpectedly (that is, when the elevator car door is opened and the elevator leaves the leveling area), the elevator controller (which has a PLC program inside that can realize automatic operation of the equipment according to pre-written program instructions) issues a command to turn on the solenoid valve 114, and the expansion piece 1142 extends downward, driving the hook plate 120 to move downward. The hook portion 121 presses the outer swing rod 223 downward, so that the inverted fan-shaped hook block 230 enters the groove 2132 and hooks with the fan-shaped tooth 2131, and prevents the winding drum 212 from rotating. At this time, the steel rope instantly generates a large pulling force to trigger the brake system to generate emergency braking to protect the safety of the people in the elevator car (waiting for maintenance personnel to rescue). At the same time, the trigger column 224 is close to the trigger switch 227 to generate a trigger signal, which is sent to the elevator controller. The elevator controller issues a command to cut off the power supply to the elevator motor to protect the motor. After the maintenance personnel eliminate the fault, the elevator resumes normal operation.

[0039] (2) When the elevator speed increases abnormally, the rotation speed of the hexagonal wheel 214 is very fast, causing the wheel edge of the jumping wheel 225 to jump around the wheel edge of the hexagonal wheel 214 (jumping occurs due to the six corners of the hexagonal wheel 214) with a large amplitude. Similarly, the outer swing rod 223 swings up and down with a large amplitude. When the jumping wheel 225 jumps to the peak value (that is, the outer swing rod 223 swings to the valley value), the inverted fan-shaped hook block 230 enters the groove 2132 and hooks with the fan-shaped tooth 2131, and prevents the winding drum 212 from rotating. At this time, the steel rope instantly generates a large pulling force to trigger the brake system to generate emergency braking to protect the safety of the people in the elevator car (waiting for the maintenance personnel to rescue). At the same time, the trigger column 224 is close to the trigger switch 227 to generate a trigger signal, which is sent to the elevator controller. The elevator controller issues a command to cut off the power supply of the elevator motor to protect the motor. After the maintenance personnel eliminate the fault, the elevator resumes normal operation.

[0040] PLC is the abbreviation of Programmable Logic Controller, which means programmable logic controller in Chinese.

[0041] In summary, the technical solution of the utility model has the following beneficial effects:

[0042] The elevator protection device of this solution can effectively and safely protect the elevator in two abnormal conditions: accidental movement of the elevator and abnormal increase in speed. The solenoid valve control mechanism of this solution has a simple structure, safe and reliable performance, quick reset, small size, easy installation, and low cost. The abnormal control mechanism of this solution has a compact and reasonable structure and can be shared in two abnormal conditions: accidental movement of the elevator and abnormal increase in speed, saving space and reducing equipment costs. In an abnormal state, this solution can not only immediately stop the elevator operation to protect personal safety, but also immediately cut off the power supply to the motor to stop the motor from rotating and protect the motor from damage. The tension spring of the abnormal control mechanism structure of this solution plays a role of rapid reset, so that this solution can immediately resume normal operation after the fault is eliminated.

[0043] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. An elevator protection device, characterized in that: It includes a solenoid valve control mechanism and an abnormal control mechanism connected to the solenoid valve control mechanism, the solenoid valve control mechanism is electrically connected to the elevator controller, the abnormal control mechanism is connected to the steel rope on the top of the elevator car, the solenoid valve control mechanism includes a solenoid valve assembly and a hook plate connected to the solenoid valve assembly, the abnormal control mechanism includes a turntable mechanism and a swing mechanism connected to the turntable mechanism, the outer end of the hook plate is connected to the outer end of the swing mechanism, and the turntable mechanism is connected to the steel rope.

2. An elevator protection device according to claim 1, characterized in that: The solenoid valve assembly comprises a mounting cover plate, a solenoid valve fixedly connected to the inner side of the mounting cover plate via a shock-proof pad and fasteners, and a housing connected to the mounting cover plate.

3. An elevator protection device according to claim 2, characterized in that: The expansion piece of the solenoid valve faces downward and is fixedly connected to the plate portion of the hook plate by bolts and nuts.

4. An elevator protection device according to claim 3, characterized in that: The plate portion of the hook plate extends out of the bottom slot of the shell.

5. An elevator protection device according to claim 4, characterized in that: The connection terminal of the solenoid valve is led out from the lead elbow through a wire.

6. An elevator protection device according to claim 5, characterized in that: The turntable mechanism includes a turntable frame, a rotating shaft arranged in the turntable frame, a winding disk arranged on the rotating shaft, a cam arranged on one side of the winding disk, and a regular hexagonal wheel arranged on the other side of the winding disk. The cam is provided with evenly spaced sector teeth, grooves are provided between the sector teeth, and the steel rope is wound around the winding disk.

7. An elevator protection device according to claim 6, characterized in that: The swing mechanism is arranged on the upper part of the turntable frame, including a swing shaft and a swing rod assembly arranged on the swing shaft. The swing rod assembly includes an inner swing rod, an outer swing rod, a trigger column, a jumping wheel, a tension spring, and a trigger switch. The trigger switch is electrically connected to the elevator controller.

8. An elevator protection device according to claim 7, characterized in that: The outer end of the inner swing arm is connected to the jumping shaft of the jumping wheel, the wheel edge of the jumping wheel rotates around the wheel edge of the regular hexagonal wheel, the middle part of the inner swing arm is connected to the upper end of the tension spring, and the lower end of the tension spring is fixed to the tension spring fixing block on one side of the turntable frame.

9. An elevator protection device according to claim 8, characterized in that: An inverted fan-shaped hook block is provided on the lower side of the outer swing rod, and the upper side of the outer swing rod is close to the upper end hook portion of the L-shaped rod of the hook plate. Under abnormal conditions, the inverted fan-shaped hook block enters the groove and hooks with the fan-shaped teeth, thereby preventing the winding drum from rotating.

10. An elevator protection device according to claim 9, characterized in that: The inner end of the trigger column is connected to the connecting part of the inner swing rod and the outer swing rod through a connecting block, and the outer end of the trigger column passes through the arc-shaped slot of the turntable frame. The trigger switch is arranged on one side of the arc-shaped slot. In an abnormal state, the outer end of the trigger column contacts the trigger switch.

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