A high-tightness gate valve
A high-sealing, gate valve technology, applied in shaft seals, sliding valves, valve details, etc., can solve the problems of poor sealing effect, large operating torque, and small operating torque of gate valves, and achieve small operating torque, long service life, and good sealing effect Good results
Active Publication Date: 2017-10-31
OUQIU VALVE CO LTD
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Problems solved by technology
[0003] In order to solve the disadvantages of the gate valve in the prior art, such as poor sealing effect, large operating torque, and easy jamming during use, the present invention provides a high-tightness gate valve with good sealing effect, small operating torque, and anti-jamming
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Embodiment Construction
[0020] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0021] Such as figure 1 A high-tightness gate valve shown includes a valve body 1, a valve cavity 2, and a valve stem 3. The left and right ends of the valve body are respectively provided with a left channel 4 and a right channel 5 communicating with the valve cavity, and the upper end of the valve stem extends into In the valve chamber, the upper end of the valve chamber 2 is provided with a sealing seat 6, and the upper end of the valve body 1 is provided with two guide rods 7, and a stop rod 8 is arranged between the guide rods, and the upper end of the valve rod passes through the seal seat 6 and the stop rod. 8. There is a graphite packing 22 between the sealing seat and the valve stem. The valve stem is also provided with a pressure sleeve 24 at the upper end of the graphite packing. The valve stem 3 is fixedly connected with the stop rod 8. T...
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The invention relates to the technical field of valves, and discloses a high-sealing-performance gate valve. The high-sealing-performance gate valve comprises a valve body, a vale cavity and a valve rod. A left valve base and a right valve base which are coaxial are arranged at the inner ends of a left passageway and a right passageway respectively. A gate plate base fixed to the valve rod is arranged at the portion between the left valve base and the right valve base. A left gate plate and a right gate plate are arranged on the two sides of the gate plate base respectively. The inner end of the left gate plate extends to form an outer connection sleeve. The inner end of the right gate plate extends to form an inner connection sleeve. The inner connection sleeve and the outer connection sleeve are connected in a sliding manner. The outer connection sleeve is in clearance fit with a connection hole in the gate plate base. A closed liquid storage cavity is formed between the inner connection sleeve and the outer connection sleeve and filled with oil. The high-sealing-performance gate valve has the beneficial effects of being good in sealing effect, small in operation torque and capable of preventing sticking.
Description
technical field [0001] The invention relates to the technical field of valves, in particular to a gate valve with high sealing performance. Background technique [0002] The gate valve is one of the commonly used cut-off valves, mainly used to connect or cut off the medium in the pipeline. The gate valve is suitable for a wide range of pressure, temperature and caliber. , Large diameter pipes. According to the shape of the spool, the gate valve is divided into wedge-shaped single gate, wedge-shaped double gate, parallel single gate and parallel double gate. Various wedge gate valves are widely used in China. The gate is a wedge-shaped structure with a simple structure. , The cost is low, but the sealing effect mainly depends on the extrusion of the gate and the valve seat, which has inherent problems such as large operating torque, easy jamming of moving parts, short life, and inconvenient use. For example: Chinese patent authorization announcement number: CN204267772U, th...
Claims
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IPC IPC(8): F16K41/02F16K3/30F16K3/02
CPCF16K3/029F16K3/30F16K41/02
Inventor 江健
Owner OUQIU VALVE CO LTD