a—球楔杆肩密封结构Ball wedge shoulder pole leak proof structure

b—槽垫自密封结构Slot pad leak proof structure

c—榫槽防火密封结构 Mortise fireproofing leak proof structure

d—三角填料密封结构Triangle padding leak proof structure

e-1—环连接结构设计 Loop connection structure design

e-2—槽垫密封结构设计 Slot pad leak proof structure design

图1所示的对夹式高压球阀的结构简图及采用的设计结构，本产品设计具有如下特点：

Chart 1 shows the structure diagram and the adopted design structure of the double-clip type high pressure ball valve. The design of this product has the following features:

1.      阀杆密封采用自主专利技术的(a) 球楔杆肩密封结构、(d)槽垫自密封结构和O型圈密封结构，使其在高压工况下不泄漏；

1. Valve rod seal adopts the independent patented technologies of (a) ball wedge shoulder pole leak proof structure, (b) slot pad leak proof structure and O-shape circle leak proof structure, which makes it not leak under high pressure.

2.      体盖连接亦采用自主专利技术的(b)槽垫自密封结构，即压力越高，密封性能越好；同时采用(c)榫槽防火密封结构，有效的保证了其在各种工况下的密封性能，介质不外漏；

2. The body cover also adopts independent patented technologies of (b) slot pad leak proof structure, which means if there is higher pressure, there is better sealing property; and (c) mortise fireproofing leak proof structure, which effectively guarantees its sealing property and allows no medium to leak.

3.      边法兰采用传统的(e-1)环连接结构或(e-2) 槽垫自密封结构（与平面法兰对接），实现与外法兰的无缝连接；

3. Side flange adopts traditional (e-1) loop connection structure design or (e-2) slot pad leak proof structure (butt joint with face flange), which realizes seamless connection with outer flange.

4.      对夹式结构设计球阀与法兰连接高压球（如图2所示）阀相比，具有明显的优势：     

4. Compared with high pressure ball valves connected by flanges, double-clip type ball valve has its own obvious advantages:

图2  常用法兰连接高压球阀

Common high pressure ball valves connected by flanges

Ø       结构紧凑，安装维修方便；Compact structure , easy installation and maintenance

Ø       减少外漏点，保证密封性能；Reducing leaking sources, ensuring sealing property

Ø       减轻重量，降低成本。Reducing weight, lowering cost

以DN50、PN420高压球阀为例，对夹式结构

相对于法兰连接式结构，其重量减少50%，

两者等比例模型如下图所示。

Set high pressure ball valves DN50 and PN420 as examples, double-clip is 50% lighter compared with flange-connected structure. The following is the models of the two with equal proportion.