回压

Along with the increase of steel ratio, the deformation ability will be raised, but with the increase of axial compression ratio, the deformation ability will be worse.

结果 得到不同轴压比和不同含骨率下的荷载－位移滞回曲线，含骨率和轴压比对钢骨－钢管混凝土柱有着明显的影响，随着含钢率的增加，构件的变形能力得到了提高，而轴压比越大，构件的变形能力越差。

It is shown that both deviator stress and confining Stress greatly affect resilient modulus, and the influence of water content is great. Degree of compaction is also an important factor affecting resilient modulus.

结果表明：偏应力σ(下标d和侧向应力(σ3)对路基土回弹模量均有显著影响，含水量对路基土回弹模量的影响非常大，而压实度同样是一个主要影响因素。

It is obtained that the zone width of starting cut is about the first weighting step, the zone width of face is changing between 23 times of period weighting step, the zone width near intake entry and return entry is about 0.70.8 times of the first weighting step, the height of trapezoidal surface is basically subject to the location of the key strata and the deformation, breaking and instability form of the voussoir beams structure.

更多到切眼侧带宽大约为初次来压步距，工作面侧带宽在23倍周期来压步距间变化，进风巷及回风巷附近带宽约为0.70.8倍初次来压步距，内外梯台面的高度受制于关键层层位及所形成砌体梁结构的变形、破断和失稳形态。

The petrochemical industry mainly uses API standard gate valve, globe valve and check valves; electricity sector, mainly in power stations using high-temperature pressure valve, globe valve, check valve and safety valve, and part Reducing Valves of the low-pressure water supply and drainage valve butterfly valve, gate valve; the chemical industry mainly uses stainless steel valve, globe valve, check valve; metallurgical industry mainly uses low-voltage large-diameter butterfly valve, oxygen valve and oxygen valves; urban construction department used mainly low-pressure valve, such as urban water mainly in the large-diameter pipeline valve, the main floor, blending the building used by the center line butterfly valve, urban heating mainly in the metal sealing butterfly valve and so on; oil pipeline used mainly flat gate valve and ball valve; the pharmaceutical industry mainly uses stainless steel ball valve; the food industry mainly uses stainless steel ball valve and so on.

石化行业主要采用API标准的闸阀、截止阀和止回阀；电力部门主要采用电站用高温压闸阀、截止阀、止回阀和安全阀及一部分给排水阀的低压蝶阀、闸阀；化工行业主要采用不锈钢闸阀、截止阀、止回阀；冶金行业主要采用低压大口径蝶阀、氧气截止阀和氧气球阀；城市建设部门主要采用低压阀，如城市自来水管道主要采用的大口径闸阀，楼寓建设主要采用的中线蝶阀，城市供热主要采用的金属密封蝶阀等；输油管线主要采用平板闸阀和球阀；制药行业主要采用不锈钢球阀；食品行业主要采用不锈钢球阀等。

Petrochemical industry major applications API standard gate valve, globe valve and check valves; electricity sector, mainly in power stations using high-temperature pressure valve, globe valve, check valve and safety valve, and part of the low-pressure water supply and drainage valve butterfly valve, gate valve; the chemical industry mainly uses stainless steel valve, globe valve, check valve; metallurgical industry mainly uses low-voltage large-diameter butterfly valve, oxygen valve and oxygen valves; urban construction department used mainly low-pressure valve, such as urban water mainly uses large-diameter brake pipe valve, the main floor, blending the building with the center line butterfly valve, urban heating primarily metal sealing butterfly valve; oil pipeline used mainly flat valve and ball valve; the pharmaceutical industry mainly uses stainless steel ball valve; the food industry mainly uses stainless steel ball valve and so on.

石化行业主要应用API标准的闸阀、截止阀和止回阀；电力部门主要采用电站用高温压闸阀、截止阀、止回阀和安全阀及一部分给排水阀的低压蝶阀、闸阀；化工行业主要采用不锈钢闸阀、截止阀、止回阀；冶金行业主要采用低压大口径蝶阀、氧气截止阀和氧气球阀；城市建设部门主要采用低压阀，如城市自来水管道主要采用大口径闸阀，楼寓建设主要采用中线蝶阀，城市供热主要采用金属密封蝶阀；输油管线主要采用平板闸阀和球阀；制药行业主要采用不锈钢球阀；食品行业主要采用不锈钢球阀等。

Petrochemical industry Rising stem resilient gate valve majopplications API standard gate valve, globe valve and check valves; electricity sector, mainly in power stations using high-temperature pressure valve, globe valve, check valve and safety valve, and part of the low-pressure water supply and drainage valve butterfly valve, gate valve; chemical industry is mainly made of stainless steel valve, globe valve, check valve; metallurgical industry Forged steel welding gate valve mainly uses low-voltage large-diameter butterfly valve, oxygen valve and oxygen valves; urban construction department used mainly low-pressure valve, Such as urban water supply pipeline used mainly large-diameter valve, floor, blending the building of the center line butterfly valve used mainly in urban heating primarily metal sealing butterfly valve; oil pipeline used mainly flat gate valve and ball valve; the pharmaceutical industry mainly uses stainless steel ball valve; the food industry mainly uses stainless steel ball valve and so on.

石化行业主要应用API标准的闸阀、截止阀和止回阀；电力部门主要采用电站用高温压闸阀、截止阀、止回阀和安全阀及一部分给排水阀的低压蝶阀、闸阀；化工行业主要采用不锈钢闸阀、截止阀、止回阀；冶金行业主要采用低压大口径蝶阀、氧气截止阀和氧气球阀；城市建设部门主要采用低压阀，如城市自来水管道主要采用大口径闸阀，楼寓建设主要采用中线蝶阀，城市供热主要采用金属密封蝶阀；输油管线主要采用平板闸阀和球阀；制药行业主要采用不锈钢球阀；食品行业主要采用不锈钢球阀等。

As a downstream piping system when the valve opens, reflux valve, when closed, the main medium used to prevent backflow to prevent the pump and drive motor reversal, as well as a container medium discharge; currently the most commonly used is the valve flap around the body Swing Pin rotation flap valve and the valve body along the vertical axis to move lift check valve, but the above two kinds of structures exist in the valve closed, medium speed back quickly from the largest drop to zero, inlet side of the pipe resulted in the rapid pressure rise, resulting Proportional Pressure Reducing Valves in damaging effects on the piping system of water hammer phenomenon, it is generally a diameter of valve production of 50 ~ 500 mm.

止回阀作为管道系统顺流时开启，逆流时关闭的阀门，主要用于防止介质倒流，防止泵及驱动电机反转以及容器内介质泄放；目前使用最普遍的是阀瓣围绕阀体销轴旋转的旋启式止回阀和阀瓣沿着阀体垂直中心线移动的升降式止回阀，但以上2种结构的阀门均存在关闭时介质倒流速度从最大迅速降为零，致使管道进水管一侧内压迅速升高，从而产生对管路系统有破坏作用的水锤现象，所以一般止回阀生产口径为50～500 mm。

Cut off cut-off valve is mainly used for fluid pathway, including the cut-off valves, gate valves, plug valves, ball valves, butterfly valves, diaphragm valves, control API Cast Steel Valves valves and other folders; The main control valve for regulating fluid pressure, flow, etc., including control valve, throttle, valve and float valve, etc.; Check valve used to prevent reverse flow of fluid; Shunt valve fluid channel for distribution of destination, or two-phase separated, including slide valves, multi-valve, trap, and emptying valves and so on; Safety valve is mainly used for security, to prevent the boiler, pressure vessel or pipeline overpressure due to the damage; Multi-valve is a valve with more than one function, such as the cut-off valve can both start and end back from the role of the role of drying.

截断阀主要用于截断流体通路，包括眼镜阀截止阀、闸阀、旋塞阀、球阀、蝶阀、隔膜阀、夹管阀等；调节阀主要用于调节流体的压力、流量等，包括调节阀、节流阀、减压阀和浮球调节阀等；止回阀用于阻止流体的逆向流动；分流阀用于分配流体的通路去向，或将氧气专用阀、铜阀门两相流体分离，包括滑阀、多通阀、疏水阀和排空气阀等；安全阀主要用于安全保护，防止锅炉、压力容器或管道因超压而破坏；多用阀是具有一种以上功能的阀门，如截止止回阀既能起断流作用又能起止回作用。

Differential pressure control point of control: heating pipe network because of distance, signal transmission is not easy to achieve, or achieve a higher cost, the use of calculated values converted to the main circulating pump import and export; or in the pressure control point for backwater install pressure gauge, pressure gauge reference value to adjust the import and export of the main circulating pump pressure.

压差控制点处压差的控制：由于供热管网距离较远，信号传输不易实现或实现成本较高，采用计算值折算到主循环泵进出口；或在压差控制点供回水管安装压力表，参考压力表数值调整主循环泵进出口的压差。

Germany TOP import plug valves categories: flange plug valves, stainless steel plug valves, cast steel plug valves, lined plug valves, plug valves turbine gate, pressure gauge plug valves, plug valves insulation.

德国TOP进口水力控制阀类：多功能水泵控制阀、多功能持压/泄压阀、多功能遥控浮球阀、缓闭式止回阀、流量控制阀、活塞式可调减压稳压阀、活塞式安全/泄压阀。

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你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。