Dual-hydraulic-control gate valve
A technology of hydraulic control and gate valves, which is applied in the field of control valves and hydraulic control gate valves. It can solve the problems of affecting gate closure, poor sealing reliability, and large installation space, and achieves good sealing reliability, short structural length, and small installation space. Effect
Inactive Publication Date: 2019-02-26
永嘉县信诚科技服务有限公司
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Problems solved by technology
However, the hydraulic control devices of existing hydraulic control gate valves are all installed on the upper end of the valve stem. The main disadvantages are that the height of the gate valve is high, the installation space is large, and there is a valve cavity between the valve seat and the valve body, and mud is easy to accumulate in the valve cavity. Affect the closing of the ram, and the sealing reliability is poor
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[0008] Such as figure 1 The double hydraulic control gate valve shown includes gate main body 2, gate plate 3 and hydraulic control device 1. The gate main body 2 is formed by connecting the front gate body and the rear gate body through bolts, and is arranged between the front gate body and the rear gate body. The sealing seat 4 and the gate plate 3 are installed between the front gate body and the rear gate body to seal and cooperate with the sealing seat 4; the gate body 2 channel adopts a rectangular structure, so that the inner cavity of the gate body 2 channel has no dead angle, improves the mud medium circulation performance, and seals Seat 4 adopts a U-shaped wear-resistant rubber sealing ring with a built-in metal skeleton, which precisely controls the sealing pre-tightening force to ensure that the gate has superior sealing performance and eliminates leakage between the U-shaped wear-resistant rubber sealing ring and the gate body 2, and the U-shaped wear-resistant T...
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The invention relates to a dual-hydraulic-control gate valve. The dual-hydraulic-control gate valve comprises a gate body, a gate board and hydraulic control devices, wherein a front gate body and a back gate body are connected through bolts to form the gate body, and a sealing base is arranged between the front gate body and a back gate body; the gate body is mainly of a rectangular structure, the sealing base is formed in a manner that a metal skeleton is internally arranged in a U-shaped wear-proof rubber seal ring, the U-shaped wear-proof rubber seal ring is mutually matched with the gateboard contact surface through a V-shaped sealing surface, and packing padding is arranged between the gate body at the upper end of the sealing base and the gate board; a middle-way flange connectingplate is arranged at the upper end of the gate body, the left side and the right side of the middle-way flange connecting plate are each symmetrically provided with a hydraulic control device, the hydraulic control devices are of hydraulic piston cylinder structures, and piston rods of the left hydraulic piston cylinder and the right hydraulic piston cylinder are fixedly connected with the two ends of a transverse rod at the upper end of the gate board respectively. The dual-hydraulic-control gate valve has the advantages of being short in product structure length, small in volume, small in installing space, good in sealing reliability and the like, and is suitable for a mud cabin at the front end of a shield tunneling machine.
Description
technical field [0001] The invention belongs to the field of valves, in particular to a hydraulic control gate valve. The invention is applicable to the control valve in the mud bin at the front end of the shield machine. Background technique [0002] The gate valve is a valve commonly used in the mud system of the shield machine. Due to the special control requirements of the mud system of the shield machine, the control valve generally adopts a hydraulic control gate valve, and a hydraulic control device pushes the valve stem to control the opening and closing of the gate. . However, the hydraulic control devices of the existing hydraulic control gate valves are all installed on the upper end of the valve stem. The main disadvantages are that the height of the gate valve is high, the installation space is large, and there is a valve cavity between the valve seat and the valve body, and the mud is easy to accumulate in the valve cavity. It affects the closing of the ram, ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F16K3/02F16K3/30F16K31/122
CPCF16K3/0227F16K3/30F16K31/122
Inventor 应建忠
Owner 永嘉县信诚科技服务有限公司