阅读说明：本技术 一种π型管束管板-管子引出结构及管子引出方法 (Pi-shaped tube bundle tube plate-tube leading-out structure and tube leading-out method ) 是由 王立昆 徐晓星 刘银河 窦炳程 于 2019-10-24 设计创作，主要内容包括：本发明涉及一种π型管束管板-管子引出结构及管子引出方法。密集π型管束向管板孔引入时产生管束中心内部管子产生弯曲,苦于空间受限无法校正管子的困难。一种π型管束管板-管子引出结构,其组成包括,连接头(1)、换热管(2)、管板(3)、内衬管(4)、辅助拉拔结构(5)和千斤顶(6),换热管的一端管面与所述的连接头焊接固定,管板上开设有换热管搭入管孔,且将焊接有连接头的换热管插入在换热管搭入管孔内,在换热管搭入管孔内插入有内衬管,且插入在换热管搭入管中的内衬管的端部与连接头焊接固定,在伸出换热管搭入管的部分内衬管的位置处与辅助拉拔结构焊接固定。本发明应用于π型管束管板-管子引出结构。(The invention relates to a pipe plate-pipe leading-out structure and a pipe leading-out method for a pi-shaped pipe bundle. When the dense pi-shaped tube bundle is introduced to the tube plate holes, the tubes in the center of the tube bundle are bent, and the difficulty that the tubes cannot be corrected due to limited space is overcome. The utility model provides a pi type tube bank tube sheet-pipe extraction structure, its constitution includes, connector (1), heat exchange tube (2), tube sheet (3), interior bushing pipe (4), supplementary draw structure (5) and jack (6), one end tube face of heat exchange tube with connector welded fastening, seted up the heat exchange tube on the tube sheet and put into the tube hole, and insert the heat exchange tube that has the connector and put into the tube hole at the heat exchange tube, it has interior bushing pipe to insert in the tube hole is put into at the heat exchange tube, and insert the tip and the connector welded fastening of interior bushing pipe in the heat exchange tube puts into the pipe, draw the structure welded fastening with supplementary in the position department of the part interior bushing pipe that stretches out the heat exchange tube and put into the pipe. The invention is applied to a pipe plate-pipe leading-out structure of the pi-shaped pipe bundle.)

1. The utility model provides a structure is drawn forth to pi type tube bank tube sheet-pipe, its constitution includes connector, heat exchange tube, tube sheet, interior bushing pipe, supplementary structure and the jack of drawing, characterized by: one end tube face of heat exchange tube with connector welded fastening, the tube sheet on seted up the heat exchange tube and taken into the tube hole, and will weld the heat exchange tube that has the connector and insert the heat exchange tube take into in the tube hole the heat exchange tube take into the tube hole in insert have interior bushing pipe, and insert the heat exchange tube take into the tip of the interior bushing pipe of pipe with connector welded fastening, stretch out the heat exchange tube and take into the position department of the partial interior bushing pipe of pipe with supplementary structure welded fastening of drawing.

2. The pi-tube bundle tube sheet-tube extraction structure as claimed in claim 1, wherein: the auxiliary drawing structure is a T-shaped plate structure, and a jack is arranged between the auxiliary drawing structure and the end part of the tube plate.

3. A method for extracting a tube sheet-tube extraction structure of pi-tube bundle according to claims 1-2, which comprises: the method comprises the following steps:

(1) setting a guide head with a proper size, and welding and fixing the guide head by a connector and a heat exchange tube, wherein the inner diameter of the tube of the heat exchange tube is 25.75 mm;

(2) one end of the guide head extends into the tube plate heat exchanger and is welded with the end part of the tube plate heat exchanger;

(3) pushing the heat exchange tube bundle welded with the connector into the tube plate;

(4) when the resistance of the pipe is larger or the pipe is bent, inserting a lining sleeve pipe, namely a tool pipe, into the heat exchange pipe and lapping the lining sleeve pipe into the pipe hole, using a phi 3.2 welding rod to penetrate into a transition head, namely a guide head, from the inside of the lining pipe, and then welding the peripheral corner;

(5) after the welding is firm, the lining pipe is welded in an elongated mode on the outer side of the pipe plate, and a T-shaped plate structure is adopted;

(6) and (4) drawing the pipes by using a jack, and leading out the pipes from the pipe plate holes, so as to finally solve the problem that all the pipes of the pipe bundle extend out of the pipe plate holes.

The technical field is as follows:

the invention relates to a pipe plate-pipe leading-out structure and a pipe leading-out method for a pi-shaped pipe bundle.

Background art:

the intensive pi-shaped tube bundle generates bending of tubes in the center of the tube bundle when being introduced into the tube plate holes, is suffered from the difficulty that the tubes cannot be corrected due to limited space, is particularly effective to the condition, plays a reference role in taking out foreign matters inserted into the tube holes, and simultaneously provides an ingenious tool structure and a novel idea for similar products.

The invention content is as follows:

the invention aims to provide a tube plate-tube leading-out structure of a pi-shaped tube bundle and a tube leading-out method.

The above purpose is realized by the following technical scheme:

the utility model provides a pi type tube bank tube sheet-pipe extraction structure, its constitution includes, connector, heat exchange tube, tube sheet, interior bushing pipe, supplementary structure and jack of drawing, one end tube face of heat exchange tube with connector welded fastening, the tube sheet on seted up the heat exchange tube and taken into the tube hole, and will weld the heat exchange tube that has the connector and insert in the heat exchange tube take into the tube hole in insert have interior bushing pipe, and insert the heat exchange tube take into the tip of interior bushing pipe in the pipe with connector welded fastening, stretch out the heat exchange tube take into the position department of the part of the bushing pipe of pipe with supplementary structure welded fastening of drawing.

The tube plate-tube leading-out structure of the Pi-shaped tube bundle is characterized in that the auxiliary drawing structure is a T-shaped plate structure, and a jack is arranged between the auxiliary drawing structure and the end part of the tube plate.

The extraction method of the pi-shaped tube bundle tube plate-tube extraction structure comprises the following steps:

(1) setting a guide head with a proper size, and welding and fixing the guide head by a connector and a heat exchange tube, wherein the inner diameter of the tube of the heat exchange tube is 25.75 mm;

(2) one end of the guide head extends into the tube plate heat exchanger and is welded with the end part of the tube plate heat exchanger;

(3) pushing the heat exchange tube bundle welded with the connector into the tube plate;

(4) when the resistance of the pipe is larger or the pipe is bent, inserting a lining sleeve pipe, namely a tool pipe, into the heat exchange pipe and lapping the lining sleeve pipe into the pipe hole, using a phi 3.2 welding rod to penetrate into a transition head, namely a guide head, from the inside of the lining pipe, and then welding the peripheral corner;

(5) after the welding is firm, the lining pipe is welded in an elongated mode on the outer side of the pipe plate, and a T-shaped plate structure is adopted;

(6) and (4) drawing the pipes by using a jack, and leading out the pipes from the pipe plate holes, so as to finally solve the problem that all the pipes of the pipe bundle extend out of the pipe plate holes.

The invention has the beneficial effects that:

1. the invention provides a simple processing method, wherein in the process of leading tube bundle tubes into tube plate holes, individual tubes are stressed greatly and are easy to bend, a special guide head is designed, and a guide tube, a novel welding structure and a novel thought and method for blind welding deep into a sleeve are added.

The invention has simple structure, convenient operation and ingenious idea, particularly provides a novel idea and a ingenious tool structure for the similar products, solves the problem that the tube bundle is guided into the tube plate, particularly provides a reference value for guiding the pi-shaped tube bundle into the tube plate, and accumulates experience for manufacturing the similar products.

In the process of introducing the tube bundle tubes into the tube plate holes, the individual tubes are easily bent under large stress, the tubes which are easily bent or have a bending tendency are marked in advance, short guide heads are welded at the end parts of the tubes, one ends of the guide heads are deeply welded by butt weld joints, then the tube bundle tubes are introduced into the tube plates, and if the operation is difficult in the guiding process, the tool tubes with the diameter phi 28 are used for inserting the tool tubes into the tube plate holes. The pipe is sleeved into one end, close to the side of the pipe plate, of the guide head, and then a phi 3.2 welding rod is used for welding the inner wall of the pipe and the end part of the tool pipe from the inner part of the tool pipe outside the pipe plate to prevent the inner wall of the pipe from being burnt and damaged and the inner wall of the pipe hole or the heat exchange pipe due to overlarge current. In the actual operation process, the length of the welding rod is ensured to be long enough. The assembly worker firstly swings the guide tube tool to go deep into the tube plate, the guide head goes deep into the guide tube, then the tube opening is fixed, the uniform gap is guaranteed, the welder goes deep into the tube hole with the welding rod, after the welding is firm, the welding rod goes through the tube extending outside to be welded, after the welding is finished, the T-shaped plate is used for connecting the end part of the tube, and then the welding is carried out. Finally, the jack is used for slowly guiding the pipe out of the pipe plate hole.

Description of the drawings:

FIG. 1 is a schematic view of a connection structure of a welded connector and a heat exchange tube of the present invention.

Fig. 2 is a schematic view of a tube hole with heat exchange tubes lapped in a tube sheet.

FIG. 3 is a schematic view of the structure of the welding lining pipe and the joint.

FIG. 4 is a schematic view of a welding liner tube with an auxiliary drawing structure.

FIG. 5 is a schematic diagram of a pipe drawing structure using a jack.

FIG. 6 is a schematic diagram of the welded structure of the present invention.

FIG. 7 is a schematic view of a pi-shaped tube bundle structure.

In the figure: 1. the device comprises a connector, 2, a heat exchange tube, 3, a tube plate, 4, a lining tube, 5, an auxiliary drawing structure, 6, a jack, 7, a welding rod and 8 and a pi-shaped tube bundle.

The specific implementation mode is as follows: