Automatic spraying maintenance device and process for prefabricated part

Abstract

The invention discloses an automatic spraying and curing device and process for prefabricated parts, and relates to the technical field of prefabricated part curing, the automatic spraying and curing device comprises two sets of mounting frames, a second water storage tank is mounted at the upper end of one set of mounting frames, and the outer wall of a first lead screw is in threaded connection with a first water storage tank used for receiving water in the second water storage tank; a water sprinkling assembly is mounted at the lower end of the first water storage tank, and an auxiliary assembly used for changing the water sprinkling angle of the water sprinkling assembly is mounted between the two mounting frames. When the first water storage tank is close to the second water storage tank, water in the second water storage tank quickly flows into the first water storage tank, so that the water injection time of the first water storage tank is shortened, the working efficiency is improved, meanwhile, when the first water storage tank is close to the mounting frame, the auxiliary assembly pushes the water spraying assembly to rotate, and the water spraying angle is changed; therefore, the angles of the water spraying assembly for spraying water back and forth intersect, water is sprayed to the inclined face of the component, and the spraying effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated component maintenance, and in particular to a prefabricated component automatic spraying maintenance device and process. BACKGROUND

[0002] The prefabricated component is a product of building industrialization, which refers to a standardized building part produced in batches by using concrete and other materials in a factory, such as beams, plates, stairs, etc. After being maintained according to specifications, it is transported to the construction site for assembly, which can significantly improve the engineering quality, construction efficiency and save resources, and is an important way to realize green construction.

[0003] In the patent "CN206623202U", an environmental protection type concrete prefabricated component automatic spraying maintenance system is provided, which comprises a horizontal support arranged on a concrete ground, a water intercepting ditch arranged on the side of the concrete ground, a water collecting pool arranged outside the concrete ground, and a water supply system for controlling automatic timing water supply spraying maintenance. The horizontal support is provided with a spraying system, the spraying system is connected with the water collecting pool through a main pipe, the end of the main pipe is connected with a submersible pump arranged at the bottom of the water collecting pool, and the water intercepting ditch is collected in the water collecting pool.

[0004] The prefabricated component automatic spraying maintenance system of the patent has a single water spraying angle and has a coverage blind area. When facing special prefabricated components with complex shapes or having recesses, vertical surfaces and inclined surfaces, the fixed spraying head is difficult to adjust the angle flexibly, which easily leads to that some local areas cannot be sprayed, affects the uniformity of the maintenance quality, and cannot ensure that all the concrete surfaces can be fully wetted. SUMMARY

[0005] The present application aims at solving the above problems and provides a prefabricated component automatic spraying maintenance device and process.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: two groups of mounting racks are provided, a first screw rod is rotatably installed at the middle position of the upper end of the two groups of mounting racks, one end of the first screw rod is connected with the output shaft of a motor, slide rails are fixedly arranged at the both sides of the upper end of the two groups of mounting racks, a second water storage tank is installed at the upper end of one group of the mounting racks, a first water storage tank for taking water in the second water storage tank is threadedly connected to the outer wall of the first screw rod, a watering assembly is installed at the lower end of the first water storage tank, and an auxiliary assembly for changing the watering angle of the watering assembly is installed at the middle of the two mounting racks.

[0007] In practical application, when spraying is needed, the staff fills water into the second water storage tank, when the first water storage tank is close to the second water storage tank, the water in the second water storage tank flows into the first water storage tank quickly, thereby reducing the water filling time of the first water storage tank, and improving the work efficiency, and when the first water storage tank is close to the mounting frame, the auxiliary assembly drives the watering assembly to rotate, thereby changing the angle of water spraying, so that the angle of the watering assembly back and forth spraying forms intersection, thereby spraying the inclined surface of the component, and improving the spraying effect, and since the water pipe only fills water into the second water storage tank, it does not need to move with the watering device, thereby reducing the pipeline wear.

[0008] Further, the second water storage tank comprises a second tank body, a second sealing cover is hingedly arranged at the upper end of the second tank body, L-shaped drain pipes are respectively arranged at the lower ends of the two sides of the second tank body, a first mounting plate is fixedly arranged at the lower end of one side of the second tank body, a second mounting plate is fixedly arranged at the upper end of the second tank body, a second screw rod is rotatably installed in the second mounting plate, a gear is fixedly arranged at the lower end of the second screw rod, an activity plate is threadedly connected to the middle of the second screw rod, fixed rods are respectively fixedly arranged at the upper ends of the two sides of the activity plate, rollers used in cooperation with the second sealing cover are installed on the upper ends of the fixed rods, sealing plates used in cooperation with the L-shaped drain pipes are respectively fixedly arranged at the lower ends of the two sides of the activity plate, and the fixed rods penetrate through the second mounting plate and slide thereon.

[0009] In practical application, when the first water storage tank is close to the second water storage tank, the rack drives the gear to rotate, the gear drives the second screw rod to rotate, the second screw rod drives the activity plate to move upward, the activity plate drives the sealing plates to move upward, thereby the L-shaped drain pipes are communicated, the water in the second tank body enters the first tank body through the L-shaped drain pipes, and the activity plate drives the fixed rods to rise, the fixed rods drive the second sealing cover to open through the rollers, thereby air enters, and the flow of water is accelerated, when the first water storage tank is away from the second water storage tank, the second sealing cover is closed, thereby the evaporation of water vapor is reduced.

[0010] Further, the first water storage tank comprises a first tank body, first sealing covers are respectively slidably arranged at the two sides of the upper end of the first tank body, fixed plates are fixedly arranged at the upper ends of the first sealing covers, reset assemblies are installed on the two sides of the fixed plates, the two ends of the first tank body are respectively slidably connected with two slide rails, a rack used in cooperation with the gear is fixedly arranged at the upper end of the first tank body, and a pressure machine is installed on the outer wall of the first tank body.

[0011] In practical application, when the first water storage tank is close to the second water storage tank, the L-shaped drain pipe pushes the first sealing cover to move, so as to open the first sealing cover to facilitate the L-shaped drain pipe to inject water into the first water storage tank, and after the water injection is completed, the first sealing cover is reset under the action of the reset assembly, so as to form a sealing effect, and then the first tank is pressurized by the pressurizing machine, so as to increase the water spraying pressure of the water spraying assembly, and then the special surface is better sprayed.

[0012] Further, the water spraying assembly comprises a connecting pipe, two ends of the connecting pipe are slidably installed with movable pipes, a lower connecting seat is fixedly installed at the middle position of the connecting pipe, two ends of the lower connecting seat are fixedly provided with rotating pipes, the distal end of the rotating pipe is rotatably connected with an upper connecting seat, the upper connecting seat is fixedly connected with the bottom of the first tank and communicates with the bottom of the first tank, a limiting assembly is arranged at the rotating pipe, and a locking bolt is threadedly connected to one side outer wall of the connecting pipe.

[0013] In practical application, when it is necessary to increase the spraying area, the locking bolt is screwed to make the locking bolt disengage from the limiting hole, and then the movable pipe is moved to change the spraying area of the water spraying assembly.

[0014] Further, the auxiliary assembly comprises an installation rod fixedly installed on the outer wall of the mounting frame, two threaded rods are threadedly connected to the middle position of the installation rod, and a push plate is installed at one end of the threaded rod close to the water spraying assembly.

[0015] In practical application, the connecting pipe is pushed by the auxiliary assembly, so that the sprayed water is changed, the inclined surface can also be well sprayed, the spraying angle of the water spraying assembly back and forth is crossed, the inclined surface of the component is sprayed, and the spraying effect is improved.

[0016] Further, the limiting assembly comprises a polygonal sleeve fixed to the outer wall of the rotating pipe and a reset plate used in cooperation, a limiting rod is slidably arranged at the corner of the reset plate, a reset spring is arranged between the limiting rod and the bottom of the first tank, the limiting rod is fixedly arranged on the bottom of the first tank, a limiting block is fixedly arranged at the lower end of the reset plate, and an arc-shaped groove used in cooperation with the limiting block is arranged in each plane of the polygonal sleeve.

[0017] Further, the reset assembly comprises a guide cylinder fixedly arranged on the outer wall of the fixed plate, a guide rod is slidably arranged at one end of the inner portion of the guide cylinder, and a tension spring is arranged between the guide rod and the inner portion of the guide cylinder.

[0018] Further, a prefabricated component automatic spraying maintenance process comprises the following steps:

[0019] A: preparation and setting

[0020] Programming: Set the spraying plan in the control computer (for example: spray for 10 minutes every 1 hour, and keep circulating);

[0021] Arrangement of components: hoist the prefabricated components that need to be maintained to the spraying area and arrange them neatly;

[0022] B: automatic operation

[0023] One-key start: the worker presses the start button in the control room;

[0024] Automatic spraying: the system automatically opens the water pump and valve according to the set program and sprays water through the device for maintenance;

[0025] C: complete transfer

[0026] Maintenance ends: after the preset maintenance time (for example, 14 hours) is reached, the system automatically stops;

[0027] Hoist out of the factory: the components meet the strength requirements and are hoisted to the next process or the yard.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] When spraying is needed, the worker fills water into the second water storage tank, when the first water storage tank is close to the second water storage tank, the water in the second water storage tank flows quickly into the first water storage tank, thereby reducing the water filling time of the first water storage tank, and improving the work efficiency, at the same time, when the first water storage tank is close to the mounting frame, the auxiliary assembly pushes the watering assembly to rotate, thereby changing the angle of water spraying, so that the angle of the watering assembly back and forth spraying forms a cross, thereby spraying the inclined surface of the component, thereby improving the spraying effect, and since the water pipe only fills water into the second water storage tank, it does not need to move with the watering device, thereby reducing the pipe wear. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The overall structure diagram of the present application is shown;

[0031] Figure 2 The second water storage tank structure diagram of the present application is shown;

[0032] Figure 3 The second screw structure diagram of the present application is shown;

[0033] Figure 4 The first water storage tank structure diagram of the present application is shown;

[0034] Figure 5 The watering assembly structure diagram of the present application is shown;

[0035] Figure 6The schematic diagram of the movable pipe structure provided by the present application is shown in the figure.

[0036] Figure 7 The schematic diagram of the limiting group structure provided by the present application is shown in the figure.

[0037] Figure 8 The schematic diagram of the resetting group structure provided by the present application is shown in the figure.

[0038] In the figure: 1, mounting frame; 2, first screw rod; 3, watering assembly; 301, connecting pipe; 302, movable pipe; 303, lower connecting seat; 304, rotating pipe; 305, upper connecting seat; 306, limiting group; 3061, resetting plate; 3062, limiting block; 3063, polygon sleeve; 3064, resetting spring; 3065, limiting rod; 307, locking bolt; 4, first water storage tank; 401, first tank body; 402, first sealing cover; 403, resetting group; 4031, guide cylinder; 4032, tension spring; 4033, guide rod; 404, rack; 405, pressure machine; 5, second water storage tank; 501, second tank body; 502, second sealing cover; 503, L-shaped drainage pipe; 504, first mounting plate; 505, second screw rod; 5051, gear; 506, movable plate; 5061, sealing plate; 507, second mounting plate; 508, fixed rod; 6, auxiliary assembly; 601, mounting rod; 602, threaded rod; 603, push plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described in the description of the present application in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] Reference Figures 1-8The utility model provides a prefabricated component automatic spraying maintenance device and process, including two groups of mounting frame 1, the first lead screw 2 is rotatably installed in the middle position of two groups of mounting frame 1 upper end, and one end of first lead screw 2 is connected with motor output shaft, and the upper end both sides of two groups of mounting frame 1 are fixedly provided with slide rail, and the upper end of one group of mounting frame 1 is installed with second water storage tank 5, and the outer wall of first lead screw 2 is threadedly connected with first water storage tank 4 for receiving water in second water storage tank 5, and the lower end of first water storage tank 4 is installed with watering assembly 3, and the middle of two mounting frames 1 is installed with auxiliary assembly 6 for changing the watering angle of watering assembly 3;

[0042] In actual application, when spraying is needed, the staff fills water to the second water storage tank 5, when the first water storage tank 4 is close to the second water storage tank 5, the water in the second water storage tank 5 flows into the first water storage tank 4 quickly, thereby reducing the water filling time of the first water storage tank 4, and further improving the work efficiency, and when the first water storage tank 4 is close to the mounting frame 1, the auxiliary assembly 6 pushes the watering assembly 3 to rotate, thereby changing the water spraying angle, so that the water spraying angle of the watering assembly 3 back and forth forms intersection, thereby spraying the inclined surface of the component, and further improving the spraying effect, and since the water pipe only fills water to the second water storage tank 5, the water pipe does not need to move with the watering device, thereby reducing the pipe wear.

[0043] Further, the second water storage tank 5 includes a second tank body 501, a second sealing cover 502 is hingedly arranged at the upper end of the second tank body 501, L-shaped drainage pipes 503 are arranged at the lower ends of both sides of the second tank body 501 respectively, a first mounting plate 504 is fixedly arranged at the lower end of one side of the second tank body 501, a second mounting plate 507 is fixedly arranged at the upper end of the second tank body 501, a second lead screw 505 is rotatably installed in the middle of the second mounting plate 507, a gear 5051 is fixedly arranged at the lower end of the second lead screw 505, a movable plate 506 is threadedly connected at the middle position of the second lead screw 505, fixed rods 508 are fixedly arranged at the upper ends of both sides of the movable plate 506 respectively, rollers cooperating with the second sealing cover 502 are installed at the upper ends of the fixed rods 508, sealing plates 5061 cooperating with the L-shaped drainage pipes 503 are fixedly arranged at the lower ends of both sides of the movable plate 506 respectively, and the fixed rods 508 penetrate through the second mounting plate 507 and slide thereon;

[0044] In practical application, when the first water storage tank 4 is close to the second water storage tank 5, the rack 404 drives the gear 5051 to rotate, the gear 5051 drives the second lead screw 505 to rotate, the second lead screw 505 drives the movable plate 506 to move upwards, the movable plate 506 drives the sealing plate 5061 to move upwards, so that the L-shaped drain pipe 503 is communicated, the water in the second tank body 501 enters the first tank body 401 from the L-shaped drain pipe 503, and the movable plate 506 drives the fixed rod 508 to rise, the fixed rod 508 drives the second sealing cover 502 to open through the roller, so that the air enters and the water flow is accelerated. When the first water storage tank 4 is away from the second water storage tank 5, the second sealing cover 502 is closed, so that the evaporation of water vapor is reduced.

[0045] Further, the first water storage tank 4 comprises a first tank body 401, first sealing covers 402 are slidably arranged at both sides of the upper end of the first tank body 401, fixed plates are fixedly arranged at the upper ends of the first sealing covers 402, reset assemblies 403 are installed at both sides of the fixed plates, both ends of the first tank body 401 are slidably connected with two slide rails, a rack 404 used in cooperation with the gear 5051 is fixedly arranged at the upper end of the first tank body 401, and a pressure machine 405 is installed on the outer wall of the first tank body 401.

[0046] In practical application, when the first water storage tank 4 is close to the second water storage tank 5, the L-shaped drain pipe 503 drives the first sealing cover 402 to move, so that the first sealing cover 402 is opened to facilitate the L-shaped drain pipe 503 to inject water into the first water storage tank 4, and after the water injection is completed, the first sealing cover 402 is reset under the action of the reset assembly 403, so that a sealing effect is formed, and then air is injected into the first tank body 401 through the pressure machine 405 to pressurize, so that the water spraying pressure of the water spraying assembly 3 is increased, and the special surface is better sprayed.

[0047] Further, the water spraying assembly 3 comprises a connecting pipe 301, movable pipes 302 are slidably installed at both ends in the connecting pipe 301, a lower connecting seat 303 is fixedly installed at the middle position of the connecting pipe 301, rotating pipes 304 are fixedly arranged at both ends of the lower connecting seat 303, upper connecting seats 305 are rotatably connected to the distal ends of the rotating pipes 304, the upper connecting seats 305 are fixedly and communicatively arranged at the bottom of the first tank body 401, limit assemblies 306 are arranged at the rotating pipes 304, locking bolts 307 are threadedly connected to one side of the outer wall of the connecting pipe 301, and limit holes used in cooperation with the locking bolts 307 are formed in the outer wall of the movable pipe 302.

[0048] In practical application, when it is necessary to increase the spraying area, the locking bolt 307 is screwed first, so that the locking bolt 307 is separated from the limit hole, and then the movable pipe 302 is moved, so that the spraying area of the water spraying assembly 3 is changed.

[0049] Further, the auxiliary assembly 6 comprises a mounting rod 601 fixedly installed on the outer wall of the mounting frame 1, two threaded rods 602 are threadedly connected to the middle position of the mounting rod 601, and a push plate 603 is installed at the end of the threaded rod 602 close to the watering assembly 3;

[0050] In actual application, the connecting pipe 301 is pushed by the auxiliary assembly 6, so that the sprayed water is changed, and the inclined surface can also be well sprayed, and the watering assembly 3 reciprocatingly sprays water at an angle to form intersection, so that the inclined surface of the component is sprayed, and the spraying effect is improved.

[0051] Further, the limiting assembly 306 comprises a polygonal sleeve 3063 fixed to the outer wall of the rotating pipe 304 and a reset plate 3061 used in cooperation with the polygonal sleeve 3063, a limiting rod 3065 is slidingly arranged at the corner of the reset plate 3061, a reset spring 3064 is arranged between the limiting rod 3065 and the bottom of the first box body 401, the limiting rod 3065 is fixedly arranged at the bottom of the first box body 401, a limiting block 3062 is fixedly arranged at the lower end of the reset plate 3061, and an arc-shaped groove matched with the limiting block 3062 is formed in each plane of the polygonal sleeve 3063.

[0052] Further, the reset assembly 403 comprises a guide cylinder 4031 fixedly arranged on the outer wall of the fixed plate, a guide rod 4033 is slidingly arranged at one end of the inside of the guide cylinder 4031, and a tension spring 4032 is arranged between the guide rod 4033 and the inside of the guide cylinder 4031.

[0053] Further, a prefabricated component automatic spraying maintenance process comprises the following steps:

[0054] A: Preparation and setting

[0055] Programming: Set the spraying plan in the control computer (for example, spray for 10 minutes every 1 hour, and cycle continuously);

[0056] Arrange the components: hoist the prefabricated components that need to be maintained to the spraying area and arrange them neatly;

[0057] B: Automatic operation

[0058] One-key start: the worker presses the start button in the control room;

[0059] Automatic spraying: the system automatically opens the water pump and the valve according to the set program, and sprays water through the device for maintenance;

[0060] C: Complete transfer

[0061] Maintenance is completed: after the preset maintenance time (for example, 14 hours) is reached, the system is automatically stopped;

[0062] Shipped out: the component meets the strength requirement and is hoisted to the next process or stock yard.

[0063] The above merely illustrates the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An apparatus for automatic spray curing of precast elements, characterized in that The utility model provides a water spraying device, including two groups of mounting frame (1), two groups the mounting frame (1) upper end middle position swing installation has first screw rod (2), one end of first screw rod (2) is connected with motor output shaft, two groups the mounting frame (1) upper end both sides are fixedly arranged with slide rail, one group the mounting frame (1) upper end is installed with second water storage tank (5), the first screw rod (2) outer wall screw connection is used for the first water storage tank (4) of fetching water in second water storage tank (5), the lower end of first water storage tank (4) is installed with watering assembly (3), the middle of two the mounting frame (1) is installed with the auxiliary assembly (6) for changing watering assembly (3) water spraying angle.

2. The automatic spray curing apparatus for precast members according to claim 1, wherein The second water storage tank (5) includes a second tank body (501), the upper end of the second tank body (501) is hingedly provided with a second sealing cover (502), the lower end of the second tank body (501) is provided with an L-shaped drain pipe (503) on each side, a first mounting plate (504) is fixedly arranged on one side of the lower end of the second tank body (501), a second mounting plate (507) is fixedly arranged on the upper end of the second tank body (501), a second lead screw (505) is rotatably mounted on the second mounting plate (507), a gear (5051) is fixedly arranged on the lower end of the second lead screw (505), an activity plate (506) is threadedly connected to the middle of the second lead screw (505), fixed rods (508) are fixedly arranged on the upper end of each side of the activity plate (506), rollers are mounted on the upper end of the fixed rods (508), and sealing plates (5061) matched with the L-shaped drain pipes (503) are fixedly arranged on the lower end of each side of the activity plate (506).

3. The automatic spray curing apparatus for precast members according to claim 2, wherein The first water storage tank (4) includes a first tank body (401), first sealing covers (402) are slidably arranged on each side of the upper end of the first tank body (401), fixed plates are fixedly arranged on the upper end of the first sealing covers (402), reset assemblies (403) are mounted on each side of the fixed plates, the first tank body (401) is slidably connected to two slide rails at both ends, a rack (404) matched with the gear (5051) is fixedly arranged on the upper end of the first tank body (401), and a pressure machine (405) is mounted on the outer wall of the first tank body (401).

4. The automatic spray curing apparatus for precast members according to claim 1, wherein The watering assembly (3) includes a connecting pipe (301), movable pipes (302) are slidably mounted at both ends in the connecting pipe (301), a lower connecting seat (303) is fixedly mounted at the middle of the connecting pipe (301), rotating pipes (304) are fixedly arranged at both ends of the lower connecting seat (303), upper connecting seats (305) are rotatably connected to the ends of the rotating pipes (304), the upper connecting seats (305) are fixedly and communicatively arranged on the bottom of the first tank body (401), limit assemblies (306) are arranged on the rotating pipes (304), locking bolts (307) are threadedly connected to the outer wall of one side of the connecting pipe (301), and limit holes matched with the locking bolts (307) are formed in the outer wall of the movable pipes (302).

5. The automatic spray curing apparatus for precast members according to claim 1, wherein The auxiliary assembly (6) comprises a mounting rod (601) fixedly installed on the outer wall of the mounting rack (1), two threaded rods (602) are threadedly connected at the middle position of the mounting rod (601), and a push plate (603) is installed at one end of the threaded rod (602) close to the watering assembly (3).

6. The automatic spray curing apparatus for precast members according to claim 4, wherein The limiting assembly (306) comprises a polygonal sleeve (3063) fixed to the outer wall of the rotating pipe (304) and a reset plate (3061) used in cooperation with the polygonal sleeve (3063), a limiting rod (3065) is slidingly arranged at the corner of the reset plate (3061), a reset spring (3064) is arranged between the limiting rod (3065) and the bottom of the first box body (401), the limiting rod (3065) is fixedly arranged at the bottom of the first box body (401), a limiting block (3062) is fixedly arranged at the lower end of the reset plate (3061), and an arc-shaped groove matched with the limiting block (3062) is formed in each plane of the polygonal sleeve (3063).

7. The automatic spray curing apparatus for precast members according to claim 3, wherein The reset assembly (403) comprises a guide cylinder (4031) fixedly arranged on the outer wall of the fixed plate, a guide rod (4033) is slidingly arranged at one end of the inner portion of the guide cylinder (4031), and a tension spring (4032) is arranged between the guide rod (4033) and the inner portion of the guide cylinder (4031).

8. A precast construction member automatic spray curing process according to claim 1 wherein, The method comprises the following steps: A: preparation and setting Program: set the spraying plan in the control computer (for example, spray for 10 minutes every 1 hour, and keep circulating); Arrange the components: hoist the precast components to be maintained to the spraying area and arrange them neatly; B: automatic operation One-key start: the worker presses the start button in the control room; Automatic spraying: the system automatically opens the water pump and valve according to the set program and sprays water for maintenance through the device; C: complete transfer Maintenance is completed: after the preset maintenance time (for example, 14 hours) is reached, the system is automatically stopped; Hoist out of the factory: the components meet the strength requirement and are hoisted to the next process or the stockyard.

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