Elevator chain testing device

Abstract

The application discloses an elevator chain test device, which comprises a connecting component for being mounted on a chain, a force applying cylinder arranged on one side of the chain, a guide column arranged in the force applying cylinder and capable of moving axially along the force applying cylinder, and a side portion of the connecting component being connected to the guide column for driving the guide column, and an iron core shaft arranged in the force applying cylinder and located in front of the guide column, wherein an inner wall in the force applying cylinder is provided with a first electromagnetic coil arranged in a circumferential direction and extending axially, and the first electromagnetic coil is used for applying an electromagnetic force to the iron core shaft so that the iron core shaft provides damping for the guide column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator test equipment, in particular to an elevator chain test device. BACKGROUND

[0002] As known, an elevator is driven by a motor through a chain, thus the mechanical properties and service life of the chain not only affect the service life of the elevator system, but also relate to the use safety of the elevator system.

[0003] In the prior art, a chain test device is usually used to simulate the force condition of the chain in a real scene. Specifically, the test device uses a hydraulic cylinder to provide hydraulic damping to simulate the load provided by the elevator to the chain. However, the extension and retraction speed of the piston rod of the hydraulic cylinder is obviously lower than the transmission speed of the chain in a real scene, in addition, the hydraulic cylinder cannot frequently adjust the damping, thereby causing a large difference between the simulated scene and the real scene. SUMMARY

[0004] In view of the above technical problems in the prior art, embodiments of the present application provide an elevator chain test device.

[0005] To solve the above technical problems, the technical solution adopted by the embodiments of the present application is as follows:

[0006] An elevator chain test device comprises:

[0007] a connecting component for being mounted on a chain;

[0008] a force applying cylinder arranged at one side of the chain;

[0009] a guide column arranged in the force applying cylinder and capable of moving axially along the force applying cylinder, a side portion of the connecting component being connected to the guide column for driving the guide column;

[0010] a core shaft arranged in the force applying cylinder and located in front of the guide column; wherein:

[0011] an inner wall in the force applying cylinder is provided with a first electromagnetic coil arranged circumferentially and extending axially, the first electromagnetic coil being used to apply an electromagnetic force to the core shaft so as to provide damping for the guide column by the core shaft.

[0012] Preferably, an arc-shaped convex portion is formed on the outer periphery of the core shaft close to both ends.

[0013] Preferably, the first electromagnetic coil comprises a plurality of groups, each group of the first electromagnetic coil being arranged circumferentially; the plurality of groups of the first electromagnetic coil are arranged spaced apart along the axial direction of the force applying cylinder.

[0014] Preferably, the elevator chain test device further comprises a jam simulation mechanism; the jam simulation mechanism comprises a jam column whose head is retractable to the inner wall of the force applying cylinder.

[0015] Preferably, the jam simulation mechanism further comprises a sleeve, a second electromagnetic coil and an iron core column; wherein:

[0016] The sleeve is fixedly sleeved outside the force applying cylinder, the second electromagnetic coil is arranged in the sleeve for driving the iron core column, and the iron core column is used for driving the jam column.

[0017] Preferably,

[0018] The iron core column is arranged axially; the head of the iron core column is towards the tail of the jam column, the tail of the jam column is provided with a slope, and the head of the iron core column cooperates with the tail of the jam column through the slope.

[0019] A spring for applying elastic force to the jam column towards the radial outside is sleeved on the jam column.

[0020] Preferably, the jam simulation mechanism is arranged at a position corresponding to the two adjacent groups of first electromagnetic coils; the jam column comprises a plurality of circumferentially arranged.

[0021] Preferably, the connecting component is a connecting block, the connecting block is fixed with the connecting disc on the chain by means of fasteners; and the connecting block and the guide column are connected by means of connecting ribs.

[0022] Compared with the prior art, the elevator chain test device disclosed by the application has the beneficial effects that.

[0023] The test device simulates the damping and jamming on the elevator by electromagnetic force, thereby providing test conditions for detecting the chain. Compared with using a hydraulic cylinder to simulate damping and jamming, the test device can better adapt to the running speed of the chain, and has the advantages of sensitive response and convenient force adjustment.

[0024] It should be understood that the foregoing general description and the following detailed description are only exemplary and illustrative, but not for limiting the application.

[0025] The foregoing summary of various implementations or examples of the technology described in this application is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The main sectional view of the elevator chain test device provided for the embodiments of the application.

[0027] Figure 2 The A-A sectional view of Figure 1 .

[0028] Figure 3 For Figure 1 Enlarged view of part B.

[0029] Reference signs:

[0030] 10 - force cylinder; 20 - first electromagnetic coil; 30 - core shaft; 31 - arc-shaped outer protrusion; 40 - guide post; 50 - jam simulation mechanism; 51 - jam post; 52 - core post; 53 - second electromagnetic coil; 54 - sleeve; 55 - spring; 60 - connecting block; 61 - connecting rib; 100 - chain; 101 - connecting disc. DETAILED DESCRIPTION

[0031] In order to keep the following description of the embodiments of the present application clear and concise, detailed description of known functions and known components is omitted.

[0032] As Figures 1 to 3 shown, the disclosed embodiments disclose an elevator chain test device, which can simulate the application of damping and jamming to the elevator, and thus provide test conditions for detecting the chain 100. The test device comprises a connecting component, a force cylinder 10, a guide post 40, a core shaft 30, a first electromagnetic coil 20, and a jam simulation mechanism 50.

[0033] The connecting component is configured as a connecting block 60, which is connected to the connecting disc 101 on the chain 100 by fasteners. Preferably, the connecting block 60 is connected to the connecting disc 101 on multiple chain links of the chain 100 at the same time. The chain 100 is driven by sprockets located at both ends of the conveying direction.

[0034] The force cylinder 10 is arranged on one side of the chain 100 and extends along the conveying direction of the chain 100. The guide post 40 is arranged in the force cylinder 10 and can move along the axial direction of the force cylinder 10. The cylinder wall of the force cylinder 10 is provided with a through slot corresponding to the area of the chain 100, and the through slot extends axially. One side of the connecting block 60 is formed with a connecting rib 61, which is connected to the guide post 40 through the through slot, so that the guide post 40 moves synchronously with the chain 100 under the drive of the chain 100.

[0035] The core shaft 30 is arranged in the force cylinder 10 in front of the guide post 40, and can move along the axial direction of the force cylinder 10. The core shaft 30 has two annular arc-shaped outer protrusions 31 on the outer circumferential surface, and the two arc-shaped outer protrusions 31 are respectively located near the two ends of the core shaft 30. The two arc-shaped outer protrusions 31 can at least be used to reduce the contact area with the force cylinder 10, and thus reduce the friction between the force cylinder 10.

[0036] The first electromagnetic coil 20 includes multiple groups, each group of the first electromagnetic coil 20 is arranged on the inner side of the inner wall of the force applying cylinder 10 without protruding from the inner wall of the force applying cylinder 10, and the multiple groups of the first electromagnetic coil 20 are arranged in the axial direction. By energizing the first electromagnetic coil 20, the first electromagnetic coil 20 applies an electromagnetic force (a backward electromagnetic force) to the iron core shaft 30 in the direction of the guide column 40, which acts on the guide column 40 and then applies damping to the chain 100. Thus, the electromagnetic force between the first electromagnetic coil 20 and the iron core column 52 is used to simulate the load of the elevator on the chain 100.

[0037] The card jam simulation mechanism 50 includes multiple groups, each group of the card jam simulation mechanism 50 is arranged at the interval between each adjacent two groups of the first electromagnetic coil 20. Each card jam simulation mechanism 50 includes an outer sleeve 54, a second electromagnetic coil 53, an iron core column 52, a card jam column 51, and a spring 55.

[0038] The outer sleeve 54 is fixedly sleeved on the outside of the force applying cylinder 10, the card jam column 51 includes multiple groups arranged in the circumferential direction, each card jam column 51 radially penetrates the cylinder wall of the force applying cylinder 10, and the head of the card jam column 51 can protrude from the inner wall of the force applying cylinder 10 when subjected to a radial force. The iron core column 52 includes multiple groups corresponding to the card jam column 51, the iron core column 52 is arranged in the axial direction in the outer sleeve 54, the second electromagnetic coil 53 is arranged on the inner wall of the outer sleeve 54, and the electromagnetic force between the second electromagnetic coil 53 and the iron core column 52 is used to simultaneously drive all the iron core columns 52. The head of the iron core column 52 is arranged as a spherical surface, the tail of the card jam column 51 is arranged as an inclined surface, and the head of the iron core column 52 cooperates with the tail of the card jam column 51. The spring 55 is sleeved on the card jam column 51 to apply a spring force radially outward to the card jam column 51.

[0039] The iron core column 52 applies a force to the tail of the card jam column 51 by electromagnetic force, and drives the head of the card jam column 51 to protrude from the inner wall of the force applying cylinder 10 by the inclined surface cooperation. After stopping energizing the second electromagnetic coil 53, the electromagnetic force is removed, and the card jam column 51 is reset by the spring 55 to retract the head in the inner wall of the force applying cylinder 10.

[0040] The use method of the above test device is introduced as follows:

[0041] When it is necessary to simulate the load of the elevator on the chain 100, the first electromagnetic coil 20 is energized, the first electromagnetic coil 20 applies an electromagnetic force to the iron core shaft 30, which acts on the guide column 40 and thus serves as the load on the chain 100.

[0042] When it is necessary to simulate a larger load working condition, the current to the first electromagnetic coil 20 is increased, and vice versa.

[0043] When the working condition of simulating load fluctuation is needed, different groups of electromagnetic coils are connected with different currents based on the requirement of load fluctuation, and only when the iron core is close to the corresponding first electromagnetic coil 20, the current is connected to the first electromagnetic coil 20, thereby saving the electric energy.

[0044] When the working condition of simulating that the elevator receives sudden blockage is needed, the second electromagnetic coil 53 is connected with electricity, the second electromagnetic coil 53 applies electromagnetic force to the iron core column 52, the electromagnetic force drives the head of the blocking column 51 to extend out of the inner wall of the force cylinder 10 through the cooperation of the inclined surface of the blocking column 51 and the iron core column 52, thereby blocking the arc-shaped outer convex part 31 of the iron core shaft 30, the iron core shaft 30 needs to have a certain impact force to make the arc-shaped outer convex part 31 pass through the blocking column 51, thereby simulating the working condition that the elevator is blocked, and by adjusting the current connected to the second electromagnetic coil 53, the blocking of the iron core shaft 30 can be adjusted, thereby simulating the working condition that the elevator is blocked in different ways.

[0045] The test device provided by the application has the advantages that:

[0046] The test device simulates the damping and blocking applied to the elevator by using electromagnetic force, thereby providing test conditions for detecting the chain 100. Compared with using a hydraulic cylinder to simulate damping and blocking, the test device can better adapt to the running speed of the chain 100, and has the advantages of sensitive response and convenient force adjustment.

[0047] The above examples are only exemplary embodiments of the application and are not used to limit the application, and the protection scope of the application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the application within the spirit and protection scope of the application, and such modifications or equivalent replacements should also be considered to fall within the protection scope of the application.

Claims

1. An elevator chain testing device, characterized in that, include: Connecting components, which are used for mounting on the chain; A force-applying cylinder is disposed on one side of the chain; A guide post is disposed in the force-applying cylinder and is capable of moving along the axial direction of the force-applying cylinder; the side of the connecting member is connected to the guide post for driving the guide post. An iron core shaft is disposed in the force-applying cylinder and located in front of the guide post; wherein: The inner wall of the force-applying cylinder is equipped with a first electromagnetic coil arranged circumferentially and extending axially. The first electromagnetic coil is used to apply electromagnetic force to the iron core shaft so that the iron core shaft provides damping for the guide column. Arc-shaped protrusions are formed on the outer periphery near both ends of the iron core shaft; The first electromagnetic coil includes multiple sets, and each set of the first electromagnetic coils is evenly distributed circumferentially; the multiple sets of the first electromagnetic coils are arranged at intervals along the axial direction of the force-applying cylinder; The elevator chain testing device also includes a jamming simulation mechanism; the jamming simulation mechanism includes a jamming column whose head can extend and retract within the inner wall of the force-applying cylinder.

2. The elevator chain testing device according to claim 1, characterized in that, The locking simulation mechanism also includes an outer casing, a second electromagnetic coil, and an iron core column; wherein: The outer sleeve is fixedly connected to the outside of the force-applying cylinder, and the second electromagnetic coil is installed in the outer sleeve to drive the iron core column, which in turn drives the locking column.

3. The elevator chain testing device according to claim 2, characterized in that, The iron core column is arranged axially; the head of the iron core column faces the tail of the blocking column, and the tail of the blocking column is provided with an inclined surface, and the head of the iron core column and the tail of the blocking column are engaged by the inclined surface. A spring is fitted onto the locking post to apply elastic force to the locking post radially outward.

4. The elevator chain testing device according to claim 1, characterized in that, The locking simulation mechanism is positioned between two adjacent sets of first electromagnetic coils; the locking posts include multiple ones arranged circumferentially.

5. The elevator chain testing device according to claim 1, characterized in that, The connecting component is a connecting block, which is fixed to the connecting disc on the chain by fasteners; the connecting block is connected to the guide post by connecting ribs.

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