Elevator steel wire rope out-of-groove inspection device

Abstract

The utility model discloses an elevator steel wire rope out-of-groove inspection device, which comprises a rope wheel support for positioning a rope wheel assembly, and is characterized in that a wheel shaft of the rope wheel assembly is fixed on the bottom surface of the rope wheel support, travel switches are respectively arranged on two sides of a rope wheel in the rope wheel assembly, and a rope blocking plate is arranged between the travel switches and a steel wire rope; a connecting line of travel switch contacts on two sides of the rope wheel is positioned on a straight line of one diameter of the rope wheel; the travel switch is connected into an elevator safety circuit. The steel wire rope is protected during normal operation of the elevator, an alarm is given and the elevator is stopped when the steel wire rope is abnormally separated from the rope groove, potential safety hazards caused by the fact that the steel wire rope of the elevator is separated from the groove are prevented and solved, and safe operation of the elevator is guaranteed. Investment is low, sensitivity is high, cost is low, and installation and adjustment are convenient; the device is suitable for newly installed elevators and can also be used for installed and operated elevators.

Description

Technical Field

[0001] The utility model relates to the technology of lifting elevators, in particular to a device for inspecting the steel wire rope of an elevator from being out of a groove. Background Art

[0002] The rope stop plate and its mechanism are a kind of setting to prevent the elevator wire rope from slipping out of the groove. The basic function of the rope stop mechanism in the prior art is to prevent the wire rope from slipping out of the groove. For example, the patent announcement number is CN207658887U, an elevator wire rope anti-slipping device, including a lever mechanism, a pull rod and a rope stop mechanism, one end of the lever mechanism is connected to the elevator speed limiter wire rope, and the other end is connected to the pull rod, the rope stop mechanism is connected to the pull rod, the lever mechanism includes a connecting rod and a swing rod, the first end of the connecting rod is connected to the elevator speed limiter wire rope, the second end of the connecting rod is in contact with or keeps a distance from the first end of the swing rod, and the second end of the swing rod is connected to the pull rod, and the pull rod and the rope stop mechanism are driven to move by the rotation of the lever mechanism to prevent the elevator wire rope from slipping out of the groove when the safety clamp is actuated. Another example is a device for detecting the jumping and disengaging of a steel wire rope of an elevator with a patent publication number of CN214733591U, which comprises a protective shell, a mounting plate connected to the top of the protective shell, a mounting hole arranged inside the mounting plate, a rotating rod connected to the inner side of the protective shell, a traction wheel connected to the other side of the rotating rod, a rope groove opened on the outer side of the traction wheel, a traction rope surrounded by the rope groove, a fixing rod connected to the bottom end of the inner side of the protective shell, and a limiting mechanism connected to the outer wall of the fixing rod, the limiting mechanism comprising a fixing plate sleeved on the outer wall of the fixing rod; the jumping and disengaging of the steel wire rope and the limiting protection are detected by the limiting mechanism.

[0003] However, as the number of elevator structures increases, the winding methods of the wire ropes used are becoming more and more complicated. In the structure of the wire rope steering (including vertical guidance), the wire rope is not only subjected to tension in the running direction, but also to horizontal forces. This horizontal force may cause the wire rope to detach from the corresponding rope groove, causing the wire ropes to twist or detach from the sheave. In mild cases, it may cause damage to the sheave wire rope and other parts, and in severe cases, it may cause the wire rope to separate from the car or counterweight, causing serious consequences. Once the rope stopper and its mechanism in the existing device fail, that is, they fail to prevent the wire rope from detaching from the groove, the elevator will not stop running immediately, so there is a safety hazard. Summary of the invention

[0004] The purpose of the utility model is to solve the above-mentioned problem and provide an elevator wire rope out-of-groove inspection device, which has the characteristics of protecting the wire rope during normal operation of the elevator, alarming and shutting down when the wire rope is out of the rope groove, low investment, high sensitivity, easy installation and adjustment, etc.

[0005] The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: an elevator wire rope de-groove inspection device, including a pulley bracket for positioning a pulley assembly, characterized in that the wheel axle of the pulley assembly is fixed on the bottom surface of the pulley bracket, and travel switches are respectively provided on both sides of the pulley in the pulley assembly, and a rope stop plate is provided between the travel switch and the wire rope; the travel switch contact connection lines on both sides of the pulley are located on a straight line where a diameter of the pulley is located; the travel switch is connected to the elevator safety circuit.

[0006] In the aforementioned elevator wire rope de-groove inspection device, preferably, the working surface of the rope retaining plate covers the entire rope sheave width, and the distance between the working surface of the rope retaining plate and the wire rope is less than or equal to the diameter of the wire rope.

[0007] In the aforementioned elevator wire rope de-groove inspection device, preferably, the rope stop plate is fixed on the rope pulley bracket, and the distance of the rope stop plate toward the rope pulley is adjustable.

[0008] In the aforementioned elevator wire rope de-groove inspection device, the rope retaining plate is an elastic structural plate.

[0009] In the aforementioned elevator wire rope de-groove inspection device, preferably, the travel switch is fixed to the car rope pulley and / or the counterweight rope pulley.

[0010] The aforementioned elevator wire rope de-groove inspection device is preferably configured such that the travel switch is fixed to the sheave bracket via a switch bracket, and the distance of the switch bracket toward the sheave is adjustable or the position of the travel switch on the switch bracket toward the sheave is adjustable.

[0011] This technical solution analyzes and studies various wire rope winding methods in the rope pulley assembly, locates the possible de-groove phenomenon of the wire rope, uses the rope pulley bracket to centrally arrange the required components, simplifies the structure, reduces the weight of the elevator operation, facilitates assembly and maintenance, and deeply develops the function of the rope retaining plate. The existing rope retaining plate is subjected to force decomposition, starting from the technical aspects of materials, structure, etc. to meet two requirements: one is to restrict the regular beating of the wire rope when ensuring the normal operation of the elevator, and the other is to force the elevator to be safely shut down when the wire rope has abnormal phenomena and causes safety hazards.

[0012] The device sets travel switches on both sides of the rope pulley in the rope pulley assembly, that is, at the straight line position where one diameter of the rope pulley is located, so as to carry out key and multi-point protection and monitoring from the part of the rope pulley most likely to come out of the groove, and uses the existing rope baffle plate between the travel switch and the wire rope for multifunctional design, so as to achieve the prevention and control purpose without adding mechanical parts.

[0013] The working surface of the rope retaining plate of this device covers the entire width of the rope wheel, and uniformly manages the steel wire ropes in all rope grooves. The distance between the working surface of the rope retaining plate and the steel wire rope is set to meet the required value when potential safety hazards occur, ensuring the sensitivity of alarm and shutdown.

[0014] Furthermore, the rope stop plate of the device is preferably an elastic structural plate, and the positions of the rope stop plate, travel switch, rope pulley bracket and other parts can be adjusted as needed, which is not only conducive to blocking the wire rope in a normal displacement state, but also can be reset after the out-of-groove alarm stops, or can be retained for continued operation through appropriate adjustments, thereby reducing the rate of replacement of parts and reducing maintenance costs.

[0015] Under normal circumstances, the force on the wire rope is small, the rope stopper will not shift, and the force of the rope stopper will return the wire rope to the original rope groove, so there is no danger. If the force on the wire rope is too great, it will squeeze the rope stopper and shift the rope stopper, and the wire rope will completely break away from the corresponding rope groove. At this time, the displacement of the rope stopper will cause the travel switch to operate, and the safety circuit will be disconnected to stop the elevator from running, thereby preventing further damage caused by the wire rope coming out of the groove.

[0016] Therefore, compared with the prior art, the beneficial effects of the utility model are: it not only maintains the protection of the wire rope during the normal operation of the elevator, but also can alarm and shut down the machine when the wire rope is out of the rope groove abnormal situation occurs, preventing and solving the safety hazards caused by the elevator wire rope being out of the groove, and ensuring the safe operation of the elevator; low investment, high sensitivity, low cost, easy installation and adjustment; it can be used for newly installed elevators, and can also be used for elevators that have been installed and operated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 yes Figure 1 Top view of the .

[0019] Figure 3 It is a structural schematic diagram of an embodiment of the installation method of the rope retaining plate of the utility model.

[0020] Figure 4 The utility model is an electrical diagram of a travel switch connected to an elevator safety circuit.

[0021] In the figure: 1- rope pulley bracket, 2- rope pulley assembly, 3- wire rope, 4- travel switch, 5- rope stop plate, 6- switch bracket. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] This embodiment is an elevator wire rope de-groove inspection device, which can be used in the car rope pulley and the counterweight rope pulley. Both locations can be installed at the same time or selectively. Its basic structure is as follows Figure 1 , Figure 2 As shown, the sheave bracket 1 includes a positioning sheave assembly 2, the sheave bracket 1 is composed of two parallel channel steels, and the two ends of the sheave assembly 2 are provided with chord cuts to form mounting surfaces, which are positioned on the bottom surface of the sheave bracket 1 channel steel through the mounting surface, and then fastened by U-shaped bolts. The sheave position requirement is that the center of the sheave is lower than the bottom surface of the channel steel, and the height of its center exceeding the bottom surface of the channel steel is the centerline height of the travel switch 4.

[0024] Travel switches 4 are respectively arranged on both sides of the rope wheel in the rope wheel assembly 2, i.e., symmetrically arranged, and a rope retaining plate 5 is arranged between the travel switch 4 and the wire rope 3. Then the contact connection line of the travel switch 4 on both sides of the rope wheel is located on a straight line where a diameter of the rope wheel is located.

[0025] Further, the travel switch 4 is fixed to the rope pulley support 1 through the switch support 6, and the distance of the switch support 6 toward the rope pulley is adjustable, or the position of the travel switch 4 on the switch support toward the rope pulley is adjustable. The working surface of the rope retaining plate 5 covers the entire rope pulley width, and the distance between the working surface of the rope retaining plate 5 and the steel wire rope 3 is less than or equal to the diameter of the steel wire rope 3.

[0026] The rope retaining plate 5 is an elastic structural plate. The rope retaining plate 5 is fixed to the bottom surface of the rope pulley bracket 1. The rope retaining plate 5 is provided with a bolt mounting waist hole so that the distance toward the rope pulley can be adjusted. The rope retaining plate 5 can also be installed on the outer side elevation of the two parallel channel steels of the rope pulley bracket 1, such as Figure 3 shown.

[0027] The travel switch 4 is connected to the elevator safety circuit. Figure 4 The rope detection switch shown is the travel switch 4 of this embodiment, which is connected to the grid with other safety switches of the elevator.

[0028] Working principle and process: When the steel wire rope 3 is subjected to horizontal force, it will be separated from the corresponding rope groove, and the steel wire rope 3 will protrude from the surface of the rope wheel and touch the rope stopper 5. Under normal conditions, that is, when the steel wire rope is subjected to less force, the rope stopper 5 will not shift, and the steel wire rope 3 will return to the original rope groove under the force of the rope stopper 5 itself, and will not cause any danger. If the steel wire rope 3 is subjected to too much force, it will squeeze the rope stopper 5, causing the rope stopper 5 to shift, and the steel wire rope 3 will completely separate from the corresponding rope groove. At this time, the displacement of the rope stopper 3 will cause the travel switch 4 to operate. Since the travel switch 4 is connected in series in the safety circuit, the safety circuit is disconnected, causing the elevator to lose power and stop running, thereby preventing the steel wire rope 3 from being separated from the groove and causing further damage.

[0029] The above embodiments are illustrations of the present invention, not limitations of the present invention. Without departing from the principles of the present technical solution, any equivalent changes or equivalent modifications made in accordance with the technical ideas proposed by the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An elevator wire rope de-groove inspection device, comprising a sheave bracket (1) for positioning a sheave assembly (2), characterized in that The axle of the rope pulley assembly is fixed on the bottom surface of the rope pulley bracket, and travel switches (4) are respectively arranged on both sides of the rope pulley in the rope pulley assembly, and a rope retaining plate (5) is arranged between the travel switch and the wire rope (3); the travel switch contact connection line on both sides of the rope pulley is located on a straight line where a diameter of the rope pulley is located; the travel switch is connected to the elevator safety circuit.

2. The elevator wire rope de-groove inspection device according to claim 1, characterized in that: The working surface of the rope retaining plate (5) covers the entire rope wheel width, and the distance between the working surface of the rope retaining plate and the steel wire rope (3) is less than or equal to the diameter of the steel wire rope.

3. The elevator wire rope de-groove inspection device according to claim 1, characterized in that: The rope blocking plate (5) is fixed on the rope wheel bracket (1), and the distance of the rope blocking plate toward the rope wheel is adjustable.

4. The elevator wire rope de-groove inspection device according to claim 1, characterized in that: The rope blocking plate (5) is an elastic structural plate.

5. An elevator wire rope de-groove inspection device according to claim 1, 2, 3 or 4, characterized in that: The travel switch (4) is fixed on the car rope pulley and / or the counterweight rope pulley.

6. The elevator wire rope de-groove inspection device according to claim 1, characterized in that: The travel switch (4) is fixed on the rope pulley support (1) via a switch support (6); the distance of the switch support toward the rope pulley is adjustable or the position of the travel switch on the switch support toward the rope pulley is adjustable.

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