CN215160076U - Elevator pre-buffering structure - Google Patents

Abstract

The utility model relates to an elevator pre-buffering structure, which comprises a well, a lift car, a counterweight block, a traction machine and a buffering component; the lift shaft comprises a bottom pit, a middle running layer and a top layer, the buffer assembly comprises a lift car buffer and a counterweight buffer, and when the lift car moves to the bottommost layer, the lower end face of the lift car is positioned in the bottom pit and compresses the lift car buffer; when the lift car moves to the topmost floor, the lower end face of the counterweight block is positioned in the pit and compresses the counterweight block buffer; a pair of magnets with the same magnetic pole are oppositely arranged between the bottom surface of the lift car and the upper end surface of the lift car buffer and between the bottom surface of the counterweight block and the upper end surface of the counterweight block buffer; the utility model discloses a reduce the pit degree of depth, realize the car and to the pouring weight single when descending to the bottom, can compress the car buffer respectively and to the pouring weight buffer, realize the real-time check-up to buffering subassembly, guarantee that it can normally work, avoid under the proruption situation because the abnormal condition of buffering subassembly and can't play the safety protection effect.

Description

Elevator pre-buffering structure

Technical Field

The utility model relates to an elevator well and buffering technical field, in particular to elevator buffer structure in advance.

Background

The elevator shaft required by the operation of the elevator consists of a plurality of parts, taking an elevator with a machine room as an example, the elevator shaft comprises an elevator pit height, an elevator operation height, an elevator top layer height and an elevator machine room height; according to the relevant regulations of an elevator regulation GB7588, the elevator acceptance standard is met, the actual hoistway error is considered, the pit of a common elevator manufacturer is set to be 1500mm in height, and the top layer is set to be 4500mm in height; if the situation that the height of the top layer of the well or the depth of the pit does not meet the requirement occurs in the actual situation, the first party needs to modify the well, and meanwhile, the situation that the well cannot be modified occurs; with reference to GB75885.7, the pit depth specified by the national standard needs to meet the requirement of 5.7.3, the top height needs to meet the requirement of 5.7.1, and when the pit depth of the elevator shaft in the field is 1000mm, the shaft can not meet the elevator acceptance standard according to the latest national standard.

As shown in fig. 1, regarding the buffer component 02 in the elevator, it is an elevator safety device providing the last kind of safety protection, it is installed in the pit of the well 01 of the elevator, located under the car 03 and counterweight 04, when the elevator moves upwards or downwards, because the wire rope breaks, the traction friction, the brake braking force is insufficient or the control system is out of order and surpasses the terminal landing floor or top floor, will be buffered by the buffer, in order to avoid the elevator car or counterweight directly hitting the bottom or top, protect the safety of passengers and equipment; in the normal operation process of the elevator, the buffer does not need to work, so that the buffer is not used for a long time and cannot automatically detect whether the buffer is in a failure state, and if the car is in accident under the condition of failure of the buffer, the buffer cannot play a safety protection role, so that manual periodical repair is needed, and the workload is large; the utility model discloses then developed an elevator buffer structure in advance to solve the problem that exists among the prior art, through the retrieval, not discover with the utility model discloses same or similar technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides an elevator buffering structure in advance to solve among the prior art pit of well below degree of depth too high and can't carry out the problem of qualified check-up to the inside buffering subassembly in pit in real time.

The technical scheme of the utility model is that: an elevator pre-buffering structure comprises a shaft, a lift car, a counterweight block, a traction machine and a buffering assembly, wherein the lift car is installed on the inner side of the shaft; the lift shaft comprises a bottom pit, a middle running layer and a top layer along the vertical direction, the buffer assembly is arranged in the bottom pit and comprises a lift car buffer and a counterweight buffer, and when the lift car moves to the bottommost layer, the lower end face of the lift car is positioned in the bottom pit and compresses the lift car buffer; when the lift car moves to the topmost floor, the lower end face of the counterweight block is positioned in the pit and compresses the counterweight block buffer; and a pair of magnets with the same magnetic pole are oppositely arranged between the bottom surface of the lift car and the upper end surface of the lift car buffer and between the bottom surface of the counterweight block and the upper end surface of the counterweight block buffer.

Preferably, the car buffer and the counterweight buffer are both provided with reset limit switches, and the reset limit switches act in a compression state of the car buffer and the counterweight buffer.

Preferably, collision limit switches are installed on the car buffer and the counterweight buffer, and the collision limit switches act when the car buffer and the counterweight buffer are in failure and the car end station cannot decelerate.

Preferably, the car buffer and the counterweight buffer both comprise a cylinder body, a piston rod and a return spring for realizing automatic return of the piston rod; the impact limit switch comprises a switch body A fixed on the side edge of the upper end part of the piston rod and a switch plate A fixed at the bottom of the car and used for triggering the switch body A; the reset limit switch comprises a switch body B fixed on the side edge of the cylinder body and a switch plate B fixed on the side edge of the piston rod and used for triggering the switch body B.

Preferably, the magnet is selected from one of a permanent magnet and an electromagnet.

Compared with the prior art, the utility model has the advantages that:

(1) the utility model discloses a reduce the pit depth, can compress the car buffer when realizing that the car once descends to the bottom layer to and also can compress to the counterweight buffer when the counterweight single descends to the bottom layer, realize the real-time check-up to the buffering subassembly, guarantee that it can normally work, avoid under the proruption situation because the abnormal condition of buffering subassembly can't play the safety protection effect; meanwhile, the reduction of the depth of the pit is also convenient for the construction of the well, and the relative height of the top floor is also reduced.

(2) A pair of magnets with the same magnetic pole are oppositely arranged between the bottom surface of the lift car and the upper end surface of the lift car buffer and between the bottom surface of the counterweight block and the upper end surface of the counterweight block buffer, so that when the lift car or the counterweight block compresses the buffer assembly, direct contact is avoided, noise is effectively reduced, and meanwhile, the buffer assembly is protected; furthermore, a pair of like-pole repelling magnets can also play a certain role in buffering when the magnets are close to each other.

(3) The collision limit switch is mainly applied to act when the bottom of the car and the car buffer and the bottom of the counterweight block and the counterweight block buffer are in abnormal collision touch under the emergency condition, namely act when the car buffer and the counterweight block buffer are in failure and the end station of the car cannot decelerate, and further limit buffering is realized.

(4) The reset limit switch acts on the compression state of the car buffer and the counterweight buffer, and when the reset limit switch is completely reset, the reset limit switch is disconnected, so that whether the car buffer and the counterweight buffer can normally work or not is judged, normal reset can be realized or not after the compression is completed, and then real-time verification on the buffering assembly is realized.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic diagram of a prior art elevator and hoistway configuration;

fig. 2 is a schematic view of an elevator pre-buffering structure according to the present invention;

fig. 3 is a partial enlarged view of an elevator pre-buffer structure according to the present invention;

fig. 4 is a schematic structural view of the car buffer in a compressed state according to the present invention;

fig. 5 is a schematic structural view of the car buffer in a non-compressed state.

Wherein: 1. well, 2, car, 3, to pouring weight, 4, hauler, 5, buffering subassembly, 6, car buffer, 7, to the block buffer, 8, pit, 9, middle operation layer, 10, top layer, 11, magnet, 12, reset limit switch, 13, switch body B, 14, switch board B, 15, striking limit switch, 16, switch body A, 17, switch board A, 18, cylinder body, 19, piston rod, 20, reset spring.

Detailed Description

The following detailed description is made in conjunction with specific embodiments of the present invention:

as shown in fig. 2 and 3, an elevator pre-buffering structure includes a hoistway 1, a car 2 installed inside the hoistway 1, a weight 3, a traction machine 4, and a buffering assembly 5 for buffering the car 2 and the weight 3; the hoistway 1 includes a pit 8, an intermediate travel floor 9, and a top floor 10 in the vertical direction, and a machine room is also provided above the hoistway 1.

The buffer assembly 5 is arranged in the pit 8, and includes a car buffer 6 and a counterweight buffer 7, and as shown in fig. 4 and 5, the car buffer 6 is taken as an example, and the car buffer 6 and the counterweight buffer 7 each include a cylinder 18, a piston rod 19, and a return spring 20 for automatically returning the piston rod 19; when the cage 2 moves to the bottommost layer, the lower end surface is positioned in the pit 8, and the cage buffer 6 is compressed; when the lift car 2 moves to the topmost floor, the lower end face of the counterweight block 3 is positioned in the pit 8, and the counterweight block buffer 7 is compressed; a pair of magnets 11 with the same magnetic pole are oppositely arranged between the bottom surface of the lift car 2 and the upper end surface of the lift car buffer 6 and between the bottom surface of the counterweight block 3 and the upper end surface of the counterweight block buffer 7, and can repel each other when approaching each other, so that the direct contact between the bottom of the lift car 2 and the upper end surface of the lift car buffer 6 and between the bottom of the counterweight block 3 and the upper end surface of the counterweight block buffer 7 is avoided, the noise is low, the lift car buffer 6 and the counterweight block buffer 7 are protected to a certain extent, and meanwhile, the magnets 11 with the same polarity as each other can also play a role in buffering; the magnet 11 may be one of a permanent magnet and an electromagnet.

As shown in fig. 4 and 5, the car buffer 6 is taken as an example, the collision limit switch 15 is mounted on both the car buffer 6 and the counterweight buffer, specifically, the collision limit switch 15 includes a switch body a16 fixed on the upper end side of the piston rod 19, and a switch plate a17 fixed on the bottom of the car 2 for triggering the switch body a 16; the impact limit switch 15 acts when the bottom of the car 2 and the car buffer 6 and the bottom of the counterweight 3 and the counterweight buffer 7 are in abnormal impact touch respectively, namely acts when the car buffer 6 and the counterweight buffer 7 are in failure and the end station of the car 2 cannot decelerate, so that further limit buffering is realized; the car buffer 6 and the counterweight buffer 7 are both provided with a reset limit switch 12, and specifically, the reset limit switch 12 comprises a switch body B13 fixed on the side of the cylinder 18 and a switch board B14 fixed on the side of the piston rod 19 and used for triggering the switch body B13; reset limit switch 12 moves under car buffer 6 and to counterweight buffer 7 compression state, and when it resets completely, reset limit switch 12 disconnection to be used for judging whether car buffer 6 and to counterweight buffer 7 can normally work, can realize normally resetting after the pressurized is accomplished promptly, and then realized the real-time check-up to buffering subassembly 5.

The utility model discloses a reduce 8 degree of depth in pit, realize 2 single drops can compress car buffer 6 when to the bottom to the car, and to 3 single drops also can compress to counterweight buffer 7 when to the bottom to the pouring weight, through the feedback of reset limit switch 12, realize the real-time check-up to buffering subassembly 5, guarantee that it can normally work, avoid under the proruption situation can't play the safety protection effect because of the abnormal condition of buffering subassembly 5; if an emergency occurs, such as the car buffer 6 and the counterweight buffer 7 are in failure, and the end station of the car 2 cannot decelerate, the impact limit switch 15 can also act and play a role in protection; at the same time, the reduction of the depth of the pit 8 also facilitates the construction of the shaft 1, and the relative height of the top 10 is also reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. It is obvious to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention, and that the embodiments are therefore to be considered in all respects as exemplary and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. An elevator pre-buffering structure comprises a shaft, a lift car, a counterweight block, a traction machine and a buffering assembly, wherein the lift car is installed on the inner side of the shaft; the well includes pit, middle operation layer and top layer along vertical direction, buffering subassembly sets up in the pit, including car buffer and to counterweight buffer, its characterized in that: when the lift car moves to the bottommost layer, the lower end face is positioned in the pit and compresses the lift car buffer; when the lift car moves to the topmost floor, the lower end face of the counterweight block is positioned in the pit and compresses the counterweight block buffer; and a pair of magnets with the same magnetic pole are oppositely arranged between the bottom surface of the lift car and the upper end surface of the lift car buffer and between the bottom surface of the counterweight block and the upper end surface of the counterweight block buffer.

2. An elevator pre-buffer structure as defined in claim 1, wherein: the car buffer and to all installing limit switch that resets on the counter mass buffer, limit switch that resets moves under car buffer and to counter mass buffer compression state.

3. An elevator pre-buffer structure as defined in claim 2, wherein: the car buffer reaches all installs striking limit switch to heavy buffer on, striking limit switch moves when car buffer and to the fault of heavy buffer and car end station can not slow down.

4. An elevator pre-buffer structure as defined in claim 3, wherein: the car buffer and the counterweight buffer respectively comprise a cylinder body, a piston rod and a return spring for realizing automatic return of the piston rod; the impact limit switch comprises a switch body A fixed on the side edge of the upper end part of the piston rod and a switch plate A fixed at the bottom of the car and used for triggering the switch body A; the reset limit switch comprises a switch body B fixed on the side edge of the cylinder body and a switch plate B fixed on the side edge of the piston rod and used for triggering the switch body B.

5. An elevator pre-buffer structure as defined in claim 1, wherein: the magnet is selected from one of a permanent magnet or an electromagnet.

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