Jiangsu Foundry introduces the valve body functions of safety valves
Heavy hammer (lever) safety valve: Use a lever and a heavy hammer to balance the pressure of the valve disc. The heavy hammer safety valve adjusts pressure by moving the direction of the heavy hammer or changing the weight of the heavy hammer. Its strength lies in its simple structure; The flaw is that it is relatively clumsy and has low recoil force. This type of safety valve can only be used on fixed equipment.
Spring tension safety valve: uses the force of the tightening spring to balance the pressure of the valve disc and seal it. The tension spring safety valve adjusts the pressure by adjusting the tightening amount of the tension spring. Its strengths lie in its small size, simplicity, high sensitivity, and unrestricted device orientation; The defect is that the force acting on the valve stem changes with the deformation of the tension spring. It is necessary to pay attention to the insulation and heat dissipation issues of the tension spring together. The tension force of the tension spring type safety valve should generally not exceed 2000 kilograms. Because the tension spring is too large and too hard, it is not suitable for accurate operation.
Pulse safety valve: The pulse safety valve consists of a main valve and an auxiliary valve. The main valve and auxiliary valve are connected together, and the pulse effect of the auxiliary valve drives the main valve to operate. According to the ratio of the large opening height of the safety valve disc to the valve seat diameter, it can be divided into: micro opening type: the opening height of the valve disc is 1/20~1/10 of the valve seat diameter. Due to the small opening height, the requirements for the structure and several shapes of this valve are not as strict as those of the full opening type. Planning, manufacturing, repair, and experimentation are relatively convenient, but the power is lower.
Open type: The opening height of the valve disc is 1/4~1/33 of the valve seat diameter. According to the structure of the safety valve body, it can be divided into ⑴ fully closed type: when discharging the medium, it does not leak out, but all is discharged through the secretion tube. Semi enclosed: When discharging the medium, one part is discharged through the secretion tube, and the other part leaks outward from the joint between the valve cover and valve stem. Open type: When discharging the medium, it is not directed to the outside and is directly secreted by the valve disc.
Heavy hammer (lever) safety valve: Use a lever and a heavy hammer to balance the pressure of the valve disc. The heavy hammer safety valve adjusts pressure by moving the direction of the heavy hammer or changing the weight of the heavy hammer. Its strength lies in its simple structure; The flaw is that it is relatively clumsy and has low recoil force. This type of safety valve can only be used on fixed equipment.
Spring tension safety valve: uses the force of the tightening spring to balance the pressure of the valve disc and seal it. The tension spring safety valve adjusts the pressure by adjusting the tightening amount of the tension spring. Its strengths lie in its small size, simplicity, high sensitivity, and unrestricted device orientation; The defect is that the force acting on the valve stem changes with the deformation of the tension spring. It is necessary to pay attention to the insulation and heat dissipation issues of the tension spring together. The tension force of the tension spring type safety valve should generally not exceed 2000 kilograms. Because the tension spring is too large and too hard, it is not suitable for accurate operation.
Pulse safety valve: The pulse safety valve consists of a main valve and an auxiliary valve. The main valve and auxiliary valve are connected together, and the pulse effect of the auxiliary valve drives the main valve to operate. According to the ratio of the large opening height of the safety valve disc to the valve seat diameter, it can be divided into: micro opening type: the opening height of the valve disc is 1/20~1/10 of the valve seat diameter. Due to the small opening height, the requirements for the structure and several shapes of this valve are not as strict as those of the full opening type. Planning, manufacturing, repair, and experimentation are relatively convenient, but the power is lower.
Open type: The opening height of the valve disc is 1/4~1/33 of the valve seat diameter. According to the structure of the safety valve body, it can be divided into ⑴ fully closed type: when discharging the medium, it does not leak out, but all is discharged through the secretion tube. Semi enclosed: When discharging the medium, one part is discharged through the secretion tube, and the other part leaks outward from the joint between the valve cover and valve stem. Open type: When discharging the medium, it is not directed to the outside and is directly secreted by the valve disc.