常州海河液压

Physical factory Customizable designSource manufacturer of ultra-high pressure hydraulic pipe expander products

Support hotline:+86-13506116557

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TUBE EXPANDER

TUBE EXPANDER

【Type】TUBE EXPANDER

【Contacts】Mr. zhou

【Telephone】+86.13506116557

【Fax】+86519.88407828

【E-mail】kxbg365@qq.com

【Address】103 Dongfang East Road, Changzhou

Consultation:+86.13506116557 QQ

Details

超高压液压胀管机专用,可按需求定做,电话135 0611 6557  螺纹:M10x1或M18x1.5

 

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Instructions for expanding head
(special for hydraulic tube expander, customized, + 86.13506116557 thread: M10x1 or m18x1.5)

The expansion head is a special part of the expansion machine, which is the key part of the expansion machine to complete the expansion joint. When using the expansion head, the following requirements shall be met:
1. Before the formal expansion joint, warm up the machine for 3-5 minutes without load.
2. Before expanding the tube, the sharp edges and burrs at the end of the heat exchanger must be removed to avoid damaging the expanding head.
3. Before installing or replacing the expansion rod, use syringe or other methods to fill the expansion rod with water or selected expansion medium and remove the air in the expansion rod.
4. When replacing and installing the hose and expansion head every time, the air in the ultra-high pressure system must be drained, and the expansion medium shall be supplemented in time to avoid affecting the working efficiency and ensuring the operation safety.
5. During the expansion joint, the extension line of the expansion joint hole of the heat exchanger (opposite to the heat exchanger) shall not stand, otherwise, steel plate or other methods shall be used for protection.
6. For some nozzles that cannot be inserted into the expansion head, the outer circle of the expansion head can be ground small. The gap between the inner diameter of the pipe and the outer diameter of the expansion head shall not exceed 0.3mm. Too large gap will greatly reduce the service life of the expansion head.
7. In the process of tube expansion, the expansion head can only be pulled out after the pressure is completely relieved. Before the expansion joint pressure is completely removed, it is forbidden to pull out the expansion head, otherwise the expansion rod will be seriously damaged.
8. When inserting or pulling out the expansion head, it is forbidden to twist the expansion head.
9. It is forbidden to conduct expansion joint before or before the expansion rod is inserted into the pipe hole, so as to avoid damaging the expansion rod.

service life:

1. The life of the expansion bar is controlled between 0.6-0.8mm in the total clearance (the sum of the clearance between the inner diameter of the tube plate hole and the outer diameter of the heat exchange tube and the clearance between the inner diameter of the heat exchange tube and the outer diameter of the expansion bar). Therefore, if the total clearance is less than 0.6mm, the service life will be longer; if the total clearance is greater than 0.8mm, the service life will be reduced; if the total clearance is greater than 1mm, the service life will be lower.

2. The life of the expansion bar is an average value. The more the number of expansion bars in the same specification, the longer the average life is. Otherwise, the shorter the average life is. It is impossible to ensure the life of less than 10 expansion bars. The larger the pipe diameter in different specifications, the longer the average life is, and vice versa. The longer the expansion bar is, the shorter the average life is, and vice versa.

3. When carrying out strength expansion joint, the edge of both sides of the expansion rod liquid bag (rubber part) must be controlled at least 8mm from the edge of the tube plate groove to prevent the edge of the liquid bag from expanding in the groove, otherwise it will seriously affect the life of the expansion rod.


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胀头使用说明

 

本胀头为胀管机专用配件,是胀管机完成胀接的关键部件,在使用本胀头时,应该满足以下几点要求:

 

1、 正式胀接前,空载开机预热机器3-5分钟。

 

2、 胀管前必须清除换热器端部的锐口和毛刺,以免损坏胀头。

 

3、 在安装或更换胀杆前,采用注射器或其它方法,使胀杆内充满水或所选的胀管介质,排除胀杆内的空气。

 

4、 在每次更换安装软管、胀头,必须排空超高压系统内的空气,并及时补充胀管介质,以免影响工作效率并保证操作安全。

 

5、 胀接时换热器胀接孔的延长线上(换热器对面)不得站人,否则应用钢板或其它方法进行防护。

 

6、 对于部分无法插入胀头的管口,可以将胀头的外圆磨小,管子的内直径与胀头的外径之间的间隙应不超过0.3毫米,过大的间隙将大大降低胀头的使用寿命。

 

7、 胀管操作过程中,必须待完全卸压后,才能拔出胀头。在胀接压力未完全卸除前,严禁拔出胀头,否则会严重损坏胀杆。

 

8、 在插入或拔出胀头时,严禁扭动胀头。

 

9、 禁止在胀杆插入管孔前或尚未全部插入管孔内,就进行胀接操作,以免损坏胀杆。

 

使用寿命

      1、胀杆的寿命是在总间隙(管板孔内径与换热管外径的间隙及换热管内径与胀杆外径间的间隙之和)控制在0.6-0.8mm之间实现的。

因此,总间隙﹤0.6mm,寿命会更长;总间隙﹥0.8mm,寿命会降低;总间隙﹥1mm,寿命会更低些。

 

      2、胀杆的寿命是一个平均值,相同规格时,数量越多,平均寿命越长,反之 则越短,10支以下无法确保寿命;不同规格时,管径越大,平均寿命越长,反之 则越短;不同长度时,胀杆越长,平均寿命越短,反之则越长。

 

      3、在实施强度胀接时,胀杆液袋(橡胶部分)两边边缘都必须控制在离管板槽边缘 8mm以上,严防液袋边缘胶接处胀在槽中,否则会严重影响胀杆寿命。

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