M-type suspension cable pulley for nuclear power plant hoisting equipment and use method of M-type suspension cable pulley

Abstract

The invention relates to the technical field of nuclear power plant rotating equipment, and provides an M-shaped suspension cable pulley for nuclear power plant hoisting equipment and a using method thereof.The pulley comprises an upper cover plate and an M-shaped bearing plate which are connected, the upper cover plate is provided with a rectangular plate and a supporting plate, a magnetic sliding rail is arranged at the bottom of the rectangular plate, and the M-shaped bearing plate is installed below the supporting plate; the M-shaped bearing plate is provided with an arc-shaped gland and a cable support, and the cable support is arranged at the lower position of the M-shaped bearing plate. According to the invention, the reliability of equipment is improved, and the economic index of equipment maintenance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant rotating equipment, and in particular to an M-type suspended cable pulley for nuclear power plant lifting equipment and a use method thereof. Background Art

[0002] More than 60 cranes are designed for a single unit in a nuclear power plant to lift some key components during the maintenance of downstream equipment. Some cranes are designed above the fuel pool and are used for material replacement and lifting during overhaul.

[0003] A crane is a large-scale electromechanical integrated equipment that is driven by a motor to complete various prescribed actions. When the upstream bus power reaches the vicinity of the equipment, the power is transmitted to the large and small motors of the equipment through cables, so that the motors can obtain power. The cables can follow the movement of the equipment through the cable pulley carrier to complete long-distance mobile power supply.

[0004] Conventional cable pulleys are composed of an upper weighing plate (hereinafter referred to as the "upper plate") and a lower meniscus (hereinafter referred to as the "lower plate"), which are assembled by two bolts, and a rubber pad is used between the cable and the upper plate to prevent the cable from rubbing against the cable and relative displacement. Conventional cable pulleys are divided into traction pulleys and running pulleys. The cable passes through several running pulleys and traction pulleys in turn, and finally connects to the equipment. The traction pulley is fixed to the equipment, and drives the traction pulley to move during the operation of the equipment, and then drives the running pulley to move through the cable traction force. If it moves in the opposite direction, the running pulley is pushed by the cable thrust.

[0005] In actual use, there are the following problems:

[0006] 1) Conventional cable traction pulleys are subject to the greatest force on the left and right sides, and have to bear the thrust or pull of more than ten pulleys. When all the forces act on two bolts, deformation is very likely to occur;

[0007] 2) Conventional cable pulleys have limited cable weight and are prone to deformation and distortion, which reduces the service life of the pulley;

[0008] 3) Conventional cable pulleys fix the cable and the upper plate together by squeezing the rubber skin, which is prone to foreign objects falling during use;

[0009] 4) Conventional cable pulleys have cables that shuttle through without any protective measures, which can easily cause cable damage. Summary of the invention

[0010] The purpose of the present invention is to provide an M-type suspended cable pulley for nuclear power plant lifting equipment and a method of using the same, so as to solve the problems of easy deformation of connecting bolts, bending due to limited bearing capacity, falling of foreign objects, large sliding friction and short service life of the pulley, thereby improving the reliability of the equipment and enhancing the economic indicators of equipment maintenance.

[0011] In order to achieve the above object, the present invention provides the following technical solutions:

[0012] On the one hand, the present invention provides an M-type suspended cable pulley for nuclear power plant lifting equipment, including a connected upper cover plate and an M-shaped load-bearing plate, wherein the upper cover plate has a rectangular plate and a support plate, a magnetic slide rail is provided at the bottom of the rectangular plate, the M-shaped load-bearing plate is installed below the support plate, the M-shaped load-bearing plate has an arc-shaped pressure cover and a cable bracket, and the cable bracket is arranged at the lower part of the M-shaped load-bearing plate.

[0013] In some embodiments, the upper cover plate is installed above the M-shaped load-bearing plate.

[0014] In some embodiments, the upper cover plate and the M-shaped load-bearing plate are detachably connected.

[0015] In some embodiments, the upper cover plate and the M-shaped load-bearing plate are connected by four sets of bolt and nut assemblies.

[0016] In some embodiments, the bolt and nut assembly has a bolt and two nuts, and the two nuts are arranged below the M-shaped load-bearing plate.

[0017] In some embodiments, the rectangular plate and the support plate are connected via a support frame.

[0018] In some embodiments, the support frame is a triangular structure.

[0019] In some embodiments, the cable bracket is provided with a plurality of hexagonal through holes.

[0020] In some embodiments, anti-foreign matter baffles are provided on both sides of the M-shaped load-bearing plate body of the M-shaped load-bearing plate.

[0021] In some embodiments, the M-shaped load-bearing plate is wavy, and the cable bracket is arranged at the trough position.

[0022] On the other hand, the present invention also provides a method for using an M-type suspended cable pulley for nuclear power plant lifting equipment, comprising:

[0023] Step 1: Install the M-shaped load-bearing plate on the crane magnetic rail through the magnetic slide rail so that it can slide left and right;

[0024] Step 2: The power cable enters one side of the M-shaped weighing plate, passes through the first arc-shaped gland for the first restriction, and then passes through the cable bracket for orderly fixing and placement again, which can also avoid the influence of horizontal stress and thus movement. Finally, it passes through the last arc-shaped gland for the last restriction, and then the power cable enters the next pulley. The anti-foreign matter baffle effectively prevents the falling of foreign objects and reduces the risk of foreign objects.

[0025] Compared with the prior art, the M-type suspended cable pulley for nuclear power plant lifting equipment and the use method thereof provided by the present invention have the following beneficial effects:

[0026] The present invention improves the reliability of equipment and enhances the economic index of equipment maintenance.

[0027] The present invention is provided with magnetic slide rails and tracks, and adopts electromagnetic coordination to achieve suspension. On the one hand, it reduces the resistance of the pulley running left and right; on the other hand, it increases the service life of the pulley and greatly improves the operation stability of the crane.

[0028] The present invention adopts an M-shaped design and is equipped with four sets of bolts and nuts for use in combination, thereby increasing the weighing capacity compared to the original pulley and preventing the pulley from being deformed.

[0029] Furthermore, the present invention provides a foreign body baffle to reduce the risk of foreign matter falling into the nuclear fuel pool, reduce the risk of unit operation, and improve the economic benefits of the power plant. The present invention reduces the risk of foreign matter falling into the nuclear fuel pool by adding a foreign matter baffle to prevent foreign matter from falling into the pool.

[0030] Furthermore, the present invention provides a cable protection device (such as an arc-shaped gland, etc.) to prevent the cable from being damaged, thereby avoiding certain economic losses and equipment unavailability.

[0031] Furthermore, the present invention adopts an arc-shaped pressure cover to replace the original rubber filling device, which increases the running stability of the cable pulley, protects the integrity of the cable structure, and prevents foreign objects from falling.

[0032] Furthermore, the present invention provides a cable bracket protruding under the M-shaped weighing plate, and the cables pass through the bracket in an orderly manner, which can be effectively fixed, avoiding the occurrence of messy cable arrangement and misalignment caused by left and right stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the technical description.

[0034] Figure 1 This is a schematic diagram of the structure of an M-type suspended cable pulley for nuclear power plant lifting equipment provided by the present invention;

[0035] Figure 2 It is a partial enlarged view of the M-type suspended cable pulley for nuclear power plant lifting equipment provided by the present invention, showing the installation position of the arc-shaped gland;

[0036] Figure 3 It is a partial enlarged view of the M-type suspended cable pulley for nuclear power plant lifting equipment provided by the present invention, showing the installation position of the cable bracket;

[0037] Figure 4 This is a partial enlarged view of the M-type suspended cable pulley for nuclear power plant lifting equipment provided by the present invention, showing the foreign body protection baffle.

[0038] Description of reference numerals:

[0039] 1. Upper cover; 2. Magnetic slide rail; 3. Support frame; 4. Bolts and nuts; 5. Support plate; 6. Arc-shaped pressure cover; 7. Cable bracket; 8. Anti-foreign matter baffle; 9. M-shaped load-bearing plate. DETAILED DESCRIPTION

[0040] The following is further explained in detail through specific implementation methods.

[0041] like Figures 1 to 4 As shown, the present invention provides an M-type suspended cable pulley for nuclear power plant lifting equipment, including an upper cover plate 1 and an M-shaped load-bearing plate 9, wherein the upper cover plate 1 is installed above the M-shaped load-bearing plate 9. The upper cover plate 1 and the M-shaped load-bearing plate 9 are assembled together through four sets of bolt and nut assemblies 4, each set of bolts is equipped with two nuts, and the two nuts are fastened under the M-shaped load-bearing plate 9 to avoid vibration and loosening. The four sets of bolt and nut assemblies 4 connect the upper cover plate 1 and the M-shaped load-bearing plate 9 together, and all forces are evenly distributed to each bolt when the equipment is running to avoid deformation.

[0042] The upper cover 1 includes a magnetic slide rail 2, a support frame 3, a support plate 5, and an arc-shaped pressure cover 6. The arc-shaped pressure cover 6 is made of an arc shape, which is integrated with the upper cover to effectively prevent the power cable from moving horizontally and causing cable damage. This structure replaces the original rubber pad function, which not only prolongs the service life, but also avoids the generation of foreign matter. The top of the upper cover 1 is a rectangular plate, and two parallel magnetic slide rails 2 are provided at the bottom of the rectangular plate. The magnetic slide rails 2 are arranged close to the bottom edge of the rectangular plate. The magnetic slide rails 2 are in the shape of an "A" as a whole and fit together with the gap of the track. After power is turned on, magnetic force is generated, so that it is suspended on the track, reducing resistance during operation. The magnetic slide rail 2 on the upper cover 1 cooperates with the track. The track is made of iron material, and the magnetic slide rail 2 is made of electromagnet material. The shape of the magnetic slide rail 2 is specially designed for the purpose of being mounted on the track; the advantage of the "A"-shaped design is that when the slide rail is mounted on the track, it is easy to install, and the track is evenly distributed on the left and right. Secondly, since it is a magnetic slide rail, a part of the gap can be left in the lower opening to facilitate magnetization, such as Figure 1 shown.

[0043] The magnetic slide rail 2 is combined with the track, and the arc-shaped pressure cover 6 is made of an arc shape and integrated with the upper cover plate to replace the function of the original rubber pad.

[0044] The support frame 3 is designed as a triangular plate structure, and the support frame 3 is fixedly installed with the support plate 5 to improve the running stability. The support frame 3 is installed in the middle of the support plate 5. The top of the support frame 3 is installed below the rectangular plate of the upper cover plate 1, for example, between the two magnetic slide rails 2.

[0045] As an implementable manner, the size of the rectangular plate of the upper cover plate 1 is 40 cm*20 cm*15 cm, and the area of ​​the support plate 5 is 80 cm*45 cm.

[0046] The M-shaped load-bearing plate 9 includes a cable bracket 7, a foreign body baffle 8, and an M-shaped load-bearing plate body. The M-shaped load-bearing plate 9 is a wave-shaped structure as a whole, with bolts installed at two wave crests and a cable bracket 7 installed at the wave trough between the two wave crests.

[0047] When the cable is raised on the bearing plate, it is pressed by the arc-shaped pressure cover 6, and when it is raised downward, it is fixed by the cable bracket 7. The anti-foreign matter baffles 8 are distributed on both sides of the M-shaped bearing plate body. By setting the anti-foreign matter baffles 8, foreign objects can be prevented from falling and the risk of foreign objects can be reduced.

[0048] like Figure 2 As shown, the arc-shaped gland 6 is a long arc as a whole, similar to a U-shaped structure, and its dimensions are: the length is slightly smaller than the width of the support plate 5, about 40 cm; the width is about 15 cm; the height is about 12 cm. The arc-shaped gland 6 is arranged above the crest of the M-shaped load-bearing plate 9, integrated with the upper cover plate, and on the bottom surface of the support plate 5, replacing the original rubber pad function.

[0049] like Figure 3 As shown, the cable bracket 7 is a flat rectangular structure with several hexagonal through holes in the middle for the power cables to pass through. The cable bracket 7 can fix the power cables in an orderly manner and avoid the movement caused by the horizontal stress, thus avoiding the twisting of the power cables and the misalignment of the slide rails.

[0050] The cable support 7 is arranged at the trough of the M-shaped load-bearing plate 9 and is fixedly mounted thereon.

[0051] like Figure 4 As shown, the foreign body protection baffle 8 adapts to the wave changes of the M-shaped load-bearing plate body. Optionally, the height of the foreign body protection baffle 8 is about 2 to 3 cm.

[0052] The power cable enters on one side of the M-shaped load-bearing plate 9, passes through the first arc-shaped pressure cover 6 for the first restriction, and then passes through the cable bracket 7 for orderly fixing and placement again, resulting in movement due to the influence of left and right stress, and finally passes through the last arc-shaped pressure cover 6 for the last restriction, and then the power cable enters the next pulley.

[0053] In addition, the present invention also provides a method for using an M-type suspended cable pulley for nuclear power plant lifting equipment, comprising the following steps:

[0054] Step 1: Install the M-shaped load-bearing plate on the crane magnetic guide rail through the magnetic slide rail 2 so that it can slide left and right;

[0055] Step 2: The power cable enters one side of the M-shaped weighing plate 9, passes through the first arc gland 6 for the first restriction, and then passes through the cable bracket 7 for orderly fixed placement again, which can also avoid the influence of horizontal stress and thus movement, and finally passes through the last arc gland 6 for the last restriction, and then the power cable enters the next pulley. Among them, the foreign body baffle 8 effectively prevents the falling of foreign bodies and reduces the risk of foreign bodies.

[0056] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An M-type suspended cable pulley for nuclear power plant lifting equipment, characterized in that: The invention comprises an upper cover plate (1) and an M-shaped load-bearing plate (9) which are connected, wherein the upper cover plate (1) comprises a rectangular plate and a support plate (5), a magnetic slide rail (2) is provided at the bottom of the rectangular plate, the M-shaped load-bearing plate (9) is installed below the support plate (5), the M-shaped load-bearing plate (9) comprises an arc-shaped pressure cover (6) and a cable bracket (7), and the cable bracket (7) is arranged at the lower part of the M-shaped load-bearing plate (9).

2. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1 is characterized in that: The upper cover plate (1) is installed above the M-shaped load-bearing plate (9).

3. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1 or 2, characterized in that: The upper cover plate (1) and the M-shaped load-bearing plate (9) are detachably connected.

4. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1, characterized in that: The upper cover plate (1) and the M-shaped load-bearing plate (9) are connected via four sets of bolt and nut assemblies (4).

5. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 4 is characterized in that: The bolt and nut assembly (4) comprises a bolt and two nuts, and the two nuts are arranged below the M-shaped load-bearing plate (9).

6. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1, characterized in that: The rectangular plate and the support plate (5) are connected via a support frame (3).

7. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1, characterized in that: The cable support (7) is provided with a plurality of hexagonal through holes.

8. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1, characterized in that: Foreign matter prevention baffles (8) are provided on both sides of the M-shaped load-bearing plate body of the M-shaped load-bearing plate (9).

9. The M-type suspended cable pulley for nuclear power plant lifting equipment according to claim 1, characterized in that: The M-shaped load-bearing plate (9) is wavy in shape, and the cable support (7) is arranged at the trough position.

10. A method for using an M-type suspended cable pulley for lifting equipment in a nuclear power plant, characterized in that: include: Step 1: Install the M-shaped load-bearing plate on the crane magnetic guide rail via the magnetic slide rail (2); Step 2: The power cable enters one side of the M-shaped weighing plate (9), passes through the first arc gland (6) for the first restriction, and then passes through the cable bracket (7) for orderly fixed placement again, passes through the last arc gland (6) for the final restriction, and then the power cable enters the next pulley.

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