The building's iron horse stool is shaped like a stool and is often called a horse stool. It is used in the middle of upper and lower two-story slab reinforcements to function as a fixed upper slab reinforcement. When the base thickness is larger (more than 800mm), it is not suitable to use a horse stool, but the bracket is more stable and firm.
Bar stools do not note on the general drawings, only a few designers to design a horse stool, most of the project engineer in the construction organization design details in its specifications, length and spacing, usually the specifications of the stool is less than the level of the plate ribs, such as The rib diameter Ñ„12 can be used as a horse stool with a diameter of Ñ„10, and of course it can be the same as the ribs. The vertical and horizontal spacing is generally 1 meter. However, the specific issues have to be treated specifically. If it is a bi-directional bi-directional plate with ribs of 8 and the rigidity of the steel bar is low, the distance between the ma- benches needs to be reduced. For example, the spacing is @800*800. If the bi-level bi-directional ribs are The distance between the 6 horse benches is @500*500. Some steel bar specifications are larger. If a diameter Ñ„14 is used, the spacing of the bar stools can be appropriately enlarged. In short, the principle of setting up the horse stool is to fix the steel mesh in the upper layer and withstand the loads of various construction activities to ensure that the protective layer of the upper steel bar is within the scope of the regulations. If the plate thickness is small, the horse stool may not be arranged. For example, if the height of the wooden stool less than 100 mm is less than 50 mm, it cannot be processed, and it may be replaced with a short steel bar or other materials. All in all, the setting of the horse stool should meet the principle of adequate use, which can meet the requirements and save resources.
More hydraulic pressure overload protection devices are used in multi-point and large-scale presses. The working principle is shown in Figure 2 to Figure 15. A hydraulic cylinder is installed at the place where the crush block was originally installed. It is called a hydraulic shortage. Each hydraulic pad is equipped with Unloading valve. One of them is also equipped with a limit switch. When the work starts, the hydraulic pump hits each hydraulic pad and the piston is lifted. There is a certain pre-force in the hydraulic pad and it will not make the slider r. When the pressure of the oil is small, it will cause a slight delay or advance of the stroke. During normal operation, the connecting rod force is transmitted to the slide body through the hydraulic oil in the hydraulic cushion. After many times of work, the oil in the system leaks out. The pressure will decrease and the hydraulic pump will be started and stopped again through the pressure relay 9 to supplement the system oil and maintain a certain value of the rush oil pressure to ensure the normal operation of the press.
When an overload occurs, the oil pressure in the liquid cushion rises sharply, causing the unloading valve to unload. The oil in the hydraulic cushion flows back to the tank through the unloading valve, causing the lower surface of the slider to rise relatively. The height of the mold increases. In order to protect the mold and the equipment, the limit switch at the same time as the unloading signals the emergency stop of the press. After the fault is cleared, the hydraulic pump starts again, the piston in the hydraulic cushion is lifted again, and the press returns to normal.
Bar stools do not note on the general drawings, only a few designers to design a horse stool, most of the project engineer in the construction organization design details in its specifications, length and spacing, usually the specifications of the stool is less than the level of the plate ribs, such as The rib diameter Ñ„12 can be used as a horse stool with a diameter of Ñ„10, and of course it can be the same as the ribs. The vertical and horizontal spacing is generally 1 meter. However, the specific issues have to be treated specifically. If it is a bi-directional bi-directional plate with ribs of 8 and the rigidity of the steel bar is low, the distance between the ma- benches needs to be reduced. For example, the spacing is @800*800. If the bi-level bi-directional ribs are The distance between the 6 horse benches is @500*500. Some steel bar specifications are larger. If a diameter Ñ„14 is used, the spacing of the bar stools can be appropriately enlarged. In short, the principle of setting up the horse stool is to fix the steel mesh in the upper layer and withstand the loads of various construction activities to ensure that the protective layer of the upper steel bar is within the scope of the regulations. If the plate thickness is small, the horse stool may not be arranged. For example, if the height of the wooden stool less than 100 mm is less than 50 mm, it cannot be processed, and it may be replaced with a short steel bar or other materials. All in all, the setting of the horse stool should meet the principle of adequate use, which can meet the requirements and save resources.
More hydraulic pressure overload protection devices are used in multi-point and large-scale presses. The working principle is shown in Figure 2 to Figure 15. A hydraulic cylinder is installed at the place where the crush block was originally installed. It is called a hydraulic shortage. Each hydraulic pad is equipped with Unloading valve. One of them is also equipped with a limit switch. When the work starts, the hydraulic pump hits each hydraulic pad and the piston is lifted. There is a certain pre-force in the hydraulic pad and it will not make the slider r. When the pressure of the oil is small, it will cause a slight delay or advance of the stroke. During normal operation, the connecting rod force is transmitted to the slide body through the hydraulic oil in the hydraulic cushion. After many times of work, the oil in the system leaks out. The pressure will decrease and the hydraulic pump will be started and stopped again through the pressure relay 9 to supplement the system oil and maintain a certain value of the rush oil pressure to ensure the normal operation of the press.
When an overload occurs, the oil pressure in the liquid cushion rises sharply, causing the unloading valve to unload. The oil in the hydraulic cushion flows back to the tank through the unloading valve, causing the lower surface of the slider to rise relatively. The height of the mold increases. In order to protect the mold and the equipment, the limit switch at the same time as the unloading signals the emergency stop of the press. After the fault is cleared, the hydraulic pump starts again, the piston in the hydraulic cushion is lifted again, and the press returns to normal.
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