Anti-falling device in top cover flange surface cleaning process

Abstract

The utility model relates to an anti-falling device in the cleaning process of a top cover flange face, which comprises a circular track, an anti-falling device and a plurality of pulley assemblies, four supporting rods are uniformly distributed on the circular track and are arranged under the top cover flange face, and the supporting rods are fixedly arranged on a machine pit lower rack buttress through expansion screws; the multiple pulley assemblies are arranged on the circular track in a sliding mode, and the falling protector is arranged on the pulley assemblies and used for being connected with a safety belt of a maintainer. The shape of the circular track is consistent with that of the top cover flange, and the falling protector slides on the circular track along with the pulley assembly, so that the falling protector is always kept right above a maintainer, the situation that the falling protector is pulled obliquely is avoided, and the safety of a sweeper is guaranteed; and the steel wire rope of the falling protector is not easy to scratch the surrounding wall, so that the cleaned flange sealing surface and the mounted sealing strip are kept clean, the leakage condition of the flange surface of the top cover is effectively reduced, and the maintenance quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-falling devices, and more specifically, it is an anti-falling device during the cleaning process of the top cover flange surface. Background Art

[0002] In the daily operation and maintenance of the power industry, power plant maintenance is a crucial task, which is directly related to the stability and safety of power supply. Especially when deeply maintaining key equipment such as guide vanes in a power plant, it is necessary to remove the support cover and the top cover. When reinstalling them, to ensure no leakage, the cleaning and sealed installation work of the flange surfaces of the top cover and the support cover are particularly crucial. The leakage of the sealing surface is related to the operation of the plant leakage system. If the leakage is too large, it may cause equipment damage and even flood the plant.

[0003] The cleaning and sealed installation work of the flange surfaces of the top cover and the support cover belong to edge high-altitude operations. To ensure the safety of high-altitude operators, safety belts and anti-falling devices need to be used. When using an anti-falling device, one end of the anti-falling device is often hung on the embedded part of the wall, and the other end is connected to the safety belt of the high-altitude operator to prevent the operator from falling.

[0004] However, it is found in actual operation that since one end of the anti-falling device is fixedly installed on the wall, it is not only easy to cause the anti-falling device to be pulled obliquely, resulting in an excessive deviation of the angle of the anti-falling device, posing a safety hazard to the operator and violating safety regulations; moreover, the cleaning personnel need to move frequently, which easily drives the steel wire rope on the anti-falling device to rub against the surrounding walls. This physical contact not only exacerbates the wear of the steel wire rope but also may bring dust and other impurities on the wall into the already cleaned flange surface area, causing repeated work. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an anti-falling device during the cleaning process of the top cover flange surface. By designing an annular track with the same shape as the top cover flange, the anti-falling device can slide on the annular track, so that the anti-falling device is always directly above the high-altitude operator, and the anti-falling device is not easily pulled obliquely, ensuring the safety of the high-altitude operator.

[0006] To solve the above technical problem, the utility model adopts the following technical scheme:

[0007] An anti-falling device during the cleaning process of the top cover flange surface includes an annular track, an anti-falling device, and a plurality of pulley assemblies. The annular track is evenly provided with four support rods and is arranged directly above the top cover flange surface. The support rods are fixedly installed on the lower frame pier of the pit by expansion screws; a plurality of pulley assemblies are slidably arranged on the annular track, and the anti-falling device is hung on the pulley assemblies for connecting with the safety belt of the maintenance personnel.

[0008] As a further improvement of the above technical scheme:

[0009] The pulley assembly includes a pulley, a mounting bracket and a lifting ring. The pulley is rotatably arranged on the mounting bracket. One side of the lifting ring is fixedly connected to the mounting bracket, and the other side is connected to the anti-falling device. The pulley is embedded in the ring rail and can slide along the ring rail. The ring rail has two sliding grooves, which are respectively located on both sides of the ring rail. The mounting bracket is U-shaped and includes a cross plate and mounting plates arranged on both sides of the cross plate. There are four pulleys, and two pulleys are installed at intervals on each mounting plate. The pulleys are embedded in the sliding grooves. The lifting ring is fixedly connected to the cross plate. The pulley is integrally formed by a wheel A and a wheel B. The wheel A and the wheel B are concentrically arranged and a step is formed at the connection. The wheel A is embedded in the sliding groove, and the step blocks outside the ring rail. A reinforcing rib is provided between the lifting ring and the cross plate.

[0010] The anti-falling device includes a steel cable for connecting to the pulley assembly and a wear-resistant sleeve sleeved outside the steel cable.

[0011] The wear-resistant sleeve is made of PVC wear-resistant material.

[0012] The ring rail is made of I-beam.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] The ring rail of the present utility model has the same shape as the top cover flange. The anti-falling device can slide on the ring rail, so that the anti-falling device is always directly above the personnel. The anti-falling device is not easily pulled obliquely, ensuring the safety of the cleaning personnel; nor is it easy to cause the steel cable of the anti-falling device to rub against the surrounding environment (such as walls, pipes, etc.), keeping the cleaned flange surface area clean. Description of the Drawings

[0015] Figure 1 It is a perspective view of one embodiment of the present utility model.

[0016] Figure 2 It is Figure 1 A perspective view of the anti-falling device in the embodiment.

[0017] Figure 3 It is Figure 1 A perspective view of the pulley assembly in the embodiment.

[0018] Description of the Reference Numerals:

[0019] 1. Ring rail; 2. Anti-falling device; 3. Pulley assembly; 4. Support rod; 11. Sliding groove; 21. Steel cable; 22. Wear-resistant sleeve; 31. Pulley; 32. Mounting bracket; 33. Lifting ring; 34. Cross plate; 35. Mounting plate; 36. Wheel A; 37. Wheel B. Detailed Embodiment

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the technical solution of the present utility model will be further described in detail and non-limitingly below in conjunction with the accompanying drawings and specific embodiments.

[0021] As Figures 1 to 3 shown, in one embodiment of the present utility model, the anti-falling device during the cleaning of the top cover flange surface includes a ring rail 1, a falling arrester 2 and a plurality of pulley assemblies 3. Four support rods 4 are evenly distributed on the ring rail 1 and are arranged directly above the top cover flange surface. The support rods 4 are fixedly installed on the underframe piers of the machine pit through expansion screws; a plurality of pulley assemblies 3 are slidably arranged on the ring rail 1, and the falling arrester 2 is hung on the pulley assemblies 3 and is used to connect with the safety belt of maintenance personnel. Since the top cover flange used in the power plant where the applicant is located is annular and located at a high altitude, when the cleaning personnel clean the top cover flange surface, they need to turn around the center of the top cover flange to clean the top cover flange surface completely. In order to ensure the safety of high-altitude operations, an anti-falling device dedicated to cleaning the top cover flange surface is designed. The ring rail 1 is designed to have the same shape as the top cover flange and provides a track for the falling arrester 2 to slide; the support rod 4 is made of I-beam and is used to fix the support rod 4 on the underframe piers of the machine pit through expansion screws; the falling arrester 2 is connected to the ring rail 1 through the pulley assembly 3, which is beneficial to the smooth sliding of the falling arrester 2 on the ring rail 1.

[0022] The ring rail 1 is made of I-beam. The I-beam has a relatively large cross-sectional area in the transverse direction, can bear a large pressure, and has small internal residual stress and is not easy to deform. And there are chutes 11 on both sides of the I-beam, so there is no need to process the chutes 11 additionally, reducing the manufacturing cost.

[0023] The pulley assembly 3 includes a pulley 31, a mounting frame 32 and a lifting ring 33. The pulley 31 is rotatably arranged on the mounting frame 32. One side of the lifting ring 33 is fixedly connected to the mounting frame 32, and the other side is connected to the anti-fall device 2. The pulley 31 is embedded in the ring rail 1 and can slide along the ring rail 1. The ring rail 1 has two slide grooves 11, and the two slide grooves 11 are respectively located on both sides of the ring rail 1; the mounting frame 32 is U-shaped and includes a cross plate 34 and a mounting plate 35 arranged on both sides of the cross plate 34. There are four pulleys 31, and each mounting plate 35 is installed with two pulleys 31 at intervals. The pulley 31 is embedded in the slide groove 11; the lifting ring 33 is fixedly connected to the cross plate 34. The pulley 31 is formed by an A wheel 36 and a B wheel 37. The A wheel 36 and the B wheel 37 are arranged concentrically and a step is formed at the connection. The A wheel 36 is embedded in the slide groove 11, and the step is blocked outside the ring rail 1. Both sides of the ring rail 1 are provided with chutes 11, so that the pulley assembly 3 can slide in the two chutes 11 at the same time, increasing the contact points or contact surfaces of the pulley assembly 3 on the ring rail 1. When the pulley assembly 3 travels on the ring rail 1, its gravity is dispersed to the ring rail 1 through multiple contact points, forming a stable supporting force. This dispersed support can reduce the situation where a single point is subjected to excessive force, thereby improving the stability of travel. At the same time, the two chutes 11 are arranged on both sides, which is conducive to designing the pulley assembly 3 into a U-shaped structure. Multiple pulleys 31 are respectively arranged on both sides of the U-shaped structure. The pulleys 31 on both sides restrain each other, and the pulley 31 is not easy to detach from the ring rail 1. The pulley 31 is designed as a large and small wheel structure, so that the pulley 31 not only contacts the inner wall of the chute 11, but also the step of the pulley 31 contacts the side wall of the ring rail 1, increasing the contact points or contact surfaces of the pulley 31 on the ring rail 1, thereby improving the stability of travel. A reinforcing rib is provided between the lifting ring 33 and the cross plate 34. The reinforcing ribs can increase the structural strength of the lifting ring 33, and the lifting ring 33 is not easily deformed or damaged.

[0024] The fall arrester 2 includes a steel cable 21 connected to the pulley assembly 3 and a wear-resistant sleeve 22 sleeved on the steel cable 21. The wear-resistant sleeve 22 is made of PVC wear-resistant material. The steel cable 21 is equipped with the wear-resistant sleeve 22, which is conducive to improving the service life and is safer. When a fall occurs, the friction of the steel cable 21 is increased to ensure that the steel cable 21 does not break.

[0025] For the use of this embodiment, refer to the following steps:

[0026] It is fixed on the pit wall by using a support rod 4, and a plurality of pulley assemblies 3 are installed on the ring rail 1 to hang the anti-falling device 2. Before the flange surface is cleaned, the anti-falling device 2 is hung at each pulley assembly 3, and the anti-falling device is hoisted into the foundation pit by a bridge crane and fixed on the lower frame pier. When the staff is dealing with the flange surface, the wire rope hook can be hung on the anti-falling device 2. During the movement of the cleaning personnel, the pulley assembly 3 is pulled by the wire rope, and the anti-falling device 2 is always kept directly above the personnel, effectively avoiding problems such as the anti-falling device 2 being pulled obliquely and with a large angle. During the movement of the cleaning personnel, the steel cable 21 of the anti-falling device 2 will not scrape against the wall, effectively avoiding repeated cleaning and improving work efficiency.

[0027] It should be understood that all of the above embodiments are exemplary rather than restrictive. Under the concept of the present utility model, various modifications or deformations made by those skilled in the art to the specific embodiments described above should be within the protection scope of the present utility model.

Claims

1. An anti-falling device during the cleaning process of the top cover flange surface, characterized in that: It includes a ring rail (1), a falling arrester (2) and a plurality of pulley assemblies (3). The ring rail (1) is evenly provided with four support rods (4) and is arranged directly above the flange surface of the top cover. The support rods (4) are fixedly installed on the pier of the lower rack of the machine pit through expansion screws; the plurality of pulley assemblies (3) are slidably arranged on the ring rail (1), and the falling arrester (2) is hung on the pulley assembly (3) and is used for connecting with the safety belt of the maintenance personnel.

2. The anti-falling device during the cleaning process of the top cover flange surface according to claim 1, characterized in that: The pulley assembly (3) includes a pulley (31), a mounting bracket (32) and a lifting ring (33). The pulley (31) is rotatably arranged on the mounting bracket (32). One side of the lifting ring (33) is fixedly connected to the mounting bracket (32), and the other side is connected to the falling arrester (2); the pulley (31) is embedded in the ring rail (1) and can slide along the ring rail (1).

3. The anti-falling device during the cleaning process of the top cover flange surface according to claim 2, characterized in that: The ring rail (1) has two chutes (11), and the two chutes (11) are respectively located on both sides of the ring rail (1); the mounting bracket (32) is U-shaped and includes a cross plate (34) and mounting plates (35) arranged on both sides of the cross plate (34). There are four pulleys (31), and two pulleys (31) are installed at intervals on each mounting plate (35). The pulleys (31) are embedded in the chutes (11); the lifting ring (33) is fixedly connected to the cross plate (34).

4. The anti-falling device during the cleaning process of the top cover flange surface according to claim 3, characterized in that: The pulley (31) is integrally formed by an A-wheel (36) and a B-wheel (37). The A-wheel (36) and the B-wheel (37) are concentrically arranged and a step is formed at the connection. The A-wheel (36) is embedded in the chute (11), and the step blocks outside the ring rail (1).

5. The anti-falling device during the cleaning process of the top cover flange surface according to claim 4, characterized in that: A reinforcing rib is provided between the lifting ring (33) and the cross plate (34).

6. The anti-falling device during the cleaning process of the top cover flange surface according to claim 1 or 5, characterized in that: The falling arrester (2) includes a steel cable (21) for connecting to the pulley assembly (3) and a wear-resistant sleeve (22) sleeved outside the steel cable (21).

7. The anti-falling device during the cleaning process of the top cover flange surface according to claim 6, characterized in that: The wear-resistant sleeve (22) is made of PVC wear-resistant material.

8. The anti-falling device during the cleaning process of the top cover flange surface according to claim 7, characterized in that: The ring rail (1) is made of I-beam.

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