Replacement method for threaded pipe seat on heat exchanger cylinder
A threaded pipe seat and replacement method technology, which is applied to metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems that cannot be cleaned, iron filings are easy to fall into the pipe bundle, etc., and achieve the effect of good heat dissipation conditions
Active Publication Date: 2020-05-26
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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- Abstract
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Problems solved by technology
[0005] Without dismantling the shell and the tube bundle, the present invention provides a threaded tube seat for the heat exchanger cylinder to solve the technical problem that iron filings easily fall into the tube bundle and cannot be cleaned in the prior art when replacing a new tube seat. replacement method
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[0028] The present invention will be further described below in conjunction with the accompanying drawings.
[0029] Taking the replacement of the riding-type tapered thread pipe seat on the shell of a condensate heat exchanger as an example, there are three pipe seats on the shell of the heat exchanger, and the seat and the shell adopt a riding-type full-penetration structure and Designed with NPT tapered threads. The threaded pipe seat needs to be sealed before the hydrostatic test. When using the screw plug to seal the threaded pipe seat, the thread is torn and the teeth are messed up due to misoperation. Because it is a tapered thread, it is difficult to repair after damage. The pipe seat needs to be repaired. Make a replacement.
[0030] Such as Figure 3 ~ Figure 8 As shown, the method for replacing the threaded pipe seat on the heat exchanger cylinder of the present invention includes the following steps: S1, remove the old pipe seat: first place fillers in the cylind...
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Abstract
The invention discloses a replacing method for a threaded pipe base on a heat exchanger barrel body. The method includes the following steps that an old pipe base is dismantled, a blank pipe base is manufactured, an auxiliary tool is manufactured and is installed, the blank pipe base is welded, and flaw detection is performed; and if flaw detection is qualified, a blank pipe base inner hole is machined, and the auxiliary tool is taken out. The auxiliary tool of the method can be placed onto a pipe bundle in the barrel body through a through hole, and the pipe bundle plays a supporting role inthe auxiliary tool; on one hand, it is avoided that iron scraps of machining after welding of the blank pipe base fall into the barrel body; on the other hand, during machining of the blank pipe baseinner hole, the cup-shaped body auxiliary tool provides enough depth space for a machining tool; and after machining of the blank pipe base is completed, and the auxiliary tool can slide out of the barrel body under the effect of the gravity of itself just by rotating the barrel body.
Description
technical field [0001] The invention relates to the technical field of heat exchangers, in particular to the replacement of a threaded pipe seat on a heat exchanger cylinder. Background technique [0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. It occupies an important position in chemical, petroleum, power, food and many other industrial productions and is widely used. The shell and tube heat exchanger is composed of shell, heat transfer tube bundle, tube sheet, baffle plate and tube box and other components. The shell is mostly cylindrical, with a tube bundle inside, and the two ends of the tube bundle are fixed on the tube sheet. There are two kinds of hot and cold fluids for heat exchange, one flows inside the tube, called tube-side fluid; the other flows outside the tube, called shell-side fluid. Such as figure 1 with figure 2 As shown, the condensed water heat exchanger in the pri...
Claims
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IPC IPC(8): B23P15/00B23P23/02B23K31/00
Inventor 赵治军程小刚唐国军于疆
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP