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渣浆泵管路安装前应检查管子和附件的规格
添加时间:2019.12.01

渣浆泵管路安装前应检查管子和附件的规格、尺寸和质量。尤其对高压管路,管子的承压能力一定要符合要求, 必要时要做水压强度试验。
一、 管路口径的选择
    管路口径越小,可减少管路购买成本,安装时也比较方便,但口径越小,会增加流速而造成较大的阻力损失,运行就不经济,尤其是进水管路,如果口径太小,容易使泵发生汽蚀。所以管路口径的选择要兼顾一次购买成本、长期运行成本及运行可靠性。一般选择流速2.5~4.5m/s,常选用3m/s较为适中,出水管流速可以高一些。
二、管路连接方法

1。 法兰盘连接

在每节管的两头有法兰盘,用螺栓将法兰盘连接,两法兰盘之间夹有一层 2 -4mm厚的橡胶板或石棉板。法兰的结构和尺寸按压力的不同而不同,按其压力的大小选取其结构、材料和尺寸。这种连接方法可承受较大的压力,装拆也比较方便,但结构较为复杂。 法兰盘

接时内口及的内齐,不要错位的内口不能小于管径。以免影响液体的流动,所以常将两个法兰的外径做成相同大小,可用外圆来找正。安装时,两法兰面要清洗干净,螺栓拧紧时, 应对称拧紧,并且每条螺栓拧紧的力要均匀,以防止法兰面歪斜而造成漏水或漏气。
2.螺纹连接
    在每节管子两头都有一段螺纹, 然后用一个带螺纹的管箍连接起来。连接时,在螺纹上绕一点麻,涂上铅油,或绕四氟薄带,要注意绕麻或四氟薄带的方向应与螺纹方向一致,否则麻或四氟带会吃不进去。先用手认上扣,再用管钳或链钳拧紧。螺纹连接一般用于口径不大、压力不太高的情况,常用以口径150mm以下的管路连接。
3.承插管连接
    管子的两头,头为大头, 一头为小头,大头向前,将管子的小头插 子的大头中,
四周镶城接头填料。连接时小头的顶端与大头内的支承端面之间应图有3 -8mm的间,以便伸缩。同时还应注意,小头插大头内与大头内壁之间的间应均匀, 为保证均匀,可用几根锲子塞在环状空中定位,在空隙中嵌塞接头填料。接头填料通常用油麻绳或石棉水泥做成一束一束,每束4~6条,每束的粗细略粗于环状空隙,并均匀一致,如图6-6所示。在缺乏填料时,可以用桐油石灰代,待实后,再把接口处上混凝垫层,或隔一定距离设置支墩来支承管子的重量和固定管路的位置。

4.混凝土管套管接头连接

在安装前。先把管子接口处外壁及套壁凿毛,但在填嵌油的部位不安装时要校正好管路的位置和高度,用泥浆石片做管子的层,在浇灌垫层时接口处也要留一段不浇,便于接头嵌塞填料用。填料般用石棉、 水泥 和油麻绳,油麻绳塞在中间,两头用石棉、水泥填塞,如图6-7所示。石棉、水泥比例般为石棉30% ,水泥70%。封口接好后,要注意保养,一般需14天左右,冬天还要注意防冻。混凝士套管连接一般只用于压力极低或无压情况下的引水管之用,泵的进出水管路上很少用,绝不允许用于泵的进水管。渣浆泵厂家

Before the installation of slurry pump pipeline, the specification, size and quality of pipes and accessories shall be checked. Especially for the high-pressure pipeline, the pressure bearing capacity of the pipe must meet the requirements, and the hydraulic strength test shall be conducted when necessary.

I. selection of pipe diameter

The smaller the diameter of the pipeline, the lower the purchase cost of the pipeline, and the more convenient the installation。 However, the smaller the diameter, the greater the flow rate and the resistance loss, and the uneconomical operation, especially for the water inlet pipeline。 If the diameter is too small, it is easy to cause cavitation of the pump。 Therefore, the selection of pipe diameter should take into account the cost of first purchase, long-term operation cost and operation reliability。 Generally, the flow rate is 2。5-4。5m/s, usually 3m / S is more appropriate, and the flow rate of outlet pipe can be higher。

II. Pipeline connection method

1. Flange connection

There are flange plates at both ends of each section of pipe, which are connected by bolts。 A layer of 2-4mm thick rubber plate or asbestos plate is sandwiched between the two flange plates。 The structure and size of flange are different according to the pressure, and the structure, material and size are selected according to the pressure。 This connection method can bear large pressure and is convenient to assemble and disassemble, but its structure is complex。 Flange plate

When connecting, the inner mouth of the pipe and the inner mouth of the pad shall be aligned without dislocation. The inner opening of the pad shall not be smaller than the pipe diameter. In order to avoid affecting the flow of liquid, the outer diameter of the two flanges is often made into the same size, which can be aligned with the outer circle. During installation, the two flange surfaces shall be cleaned. When tightening the bolts, they shall be weighed and tightened. The tightening force of each bolt shall be even to prevent water leakage or air leakage caused by flange surface deflection.

2. Threaded connection

There is a section of thread at both ends of each section of pipe, and then it is connected with a threaded hoop。 When connecting, wrap a bit of hemp around the thread, apply lead oil, or wrap Teflon thin strip。 Pay attention that the direction of winding hemp or Teflon thin strip should be the same as the thread direction, otherwise the hemp or Teflon strip will not eat in。 First, confirm the buckle by hand, and then tighten it with pipe tongs or chain tongs。 Threaded connection is generally used for the case of small diameter and low pressure。 It is commonly used for the pipeline connection with diameter less than 150 mm。

3。 Socket pipe connection

The two ends of the pipe are big end and one end is small end. The big end is forward. Insert the small end of the pipe into the big end of the pipe,

Surrounding inlaid city joint filler. When connecting, there should be a clearance of 3-8mm between the top of the small head and the supporting end face in the large head to facilitate expansion. At the same time, it should be noted that the gap between the small head inserted into the big head and the inner wall of the big head should be uniform. To ensure uniformity, several wedge plugs can be used to locate in the annular gap, and joint filler can be inserted in the gap. The joint filler is usually made of a bundle of hemp rope or asbestos cement, with 4-6 pieces in each bundle. The thickness of each bundle is slightly larger than the annular space, and it is uniform, as shown in Figure 6-6. In case of lack of filler, it can also be replaced by tung oil lime. After the interface is filled, the concrete cushion shall be poured on the interface, or piers shall be set every certain distance to support the weight of the pipe and fix the position of the pipeline.

4. Concrete pipe sleeve joint connection

Before installation. First roughen the outer wall of the pipe joint and the inner wall of the casing, but do not roughen the part filled with oil hemp rope. During installation, correct the position and height of the pipe. Use mud stone as the cushion of the pipe. When pouring the cushion, leave a section of the joint not to be poured for the convenience of joint plugging. Generally, asbestos, cement and hemp rope are used as fillers. The hemp rope is plugged in the middle and the two ends are filled with asbestos and cement, as shown in Figure 6-7. The proportion of asbestos and cement is generally 30% and 70% respectively. After sealing, pay attention to maintenance, generally about 14 days, and pay attention to antifreeze in winter. Generally, the connection of coagulant casing is only used for the water diversion pipe under the condition of extremely low pressure or no pressure, and the inlet and outlet water pipes of the pump are rarely used, so it is not allowed to be used for the water inlet pipe of the pump. Slurry pump manufacturer



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