阅读说明：本技术 一种用于调节换热器上下管板的拔管器 (Tube drawing device for adjusting upper tube plate and lower tube plate of heat exchanger ) 是由 李秋石 张盛岩 关庆鹤 于 2020-07-06 设计创作，主要内容包括：一种用于调节换热器上下管板的拔管器,属于换热器安装技术领域,以解决现有的“π”型结构换热管在安装过程中,采用对换热管尾部敲击的方式,作用效果不明显,而采用金属棒拉拔的方式对换热管内壁造成划伤,且存在一定危险性,拉出的成功率不高的问题。本发明包括拉杆、胀套、顶紧管、螺母和两个外圆锥套,拉杆上设有台肩和外螺纹,两个外圆锥套和顶紧管依次套设在拉杆上,其中一个外圆锥套与拉杆的轴肩相贴,两个外圆锥套之间设有胀套,胀套的内表面的两端加工有圆锥面,每个圆锥面与每个外圆锥套配合,拉杆的外螺纹与螺母配合,通过旋拧螺母能使胀套沿着径向膨胀。本发明适用于非直线型换热管的安装。(The utility model provides a tube drawer for adjusting tube sheet about heat exchanger, belongs to heat exchanger installation technical field to solve current "pi" type structure heat exchange tube and in the installation, adopt the mode of knocking the heat exchange tube afterbody, the effect is not obvious, and the mode that adopts the metal rod to draw causes the fish tail to the heat exchange tube inner wall, and has certain danger, the not high problem of success rate of pulling out. The invention comprises a pull rod, an expansion sleeve, a jacking pipe, a nut and two outer conical sleeves, wherein the pull rod is provided with a shoulder and an external thread, the two outer conical sleeves and the jacking pipe are sequentially sleeved on the pull rod, one outer conical sleeve is attached to the shaft shoulder of the pull rod, the expansion sleeve is arranged between the two outer conical sleeves, conical surfaces are processed at two ends of the inner surface of the expansion sleeve, each conical surface is matched with each outer conical sleeve, the external thread of the pull rod is matched with the nut, and the expansion sleeve can expand along the radial direction by screwing the nut. The invention is suitable for the installation of the nonlinear heat exchange tube.)

1. A tube extractor for adjusting an upper tube plate and a lower tube plate of a heat exchanger is characterized by comprising a pull rod (1), an expansion sleeve (2), a puller tube (3), a nut (4) and two outer conical sleeves (5), wherein a shoulder (1-1) and an external thread (1-2) are arranged on the pull rod (1), the two outer conical sleeves (5) and the puller tube (3) are sequentially sleeved on the pull rod (1), one of the outer conical sleeves (5) is attached to a shoulder (1-1) of the pull rod (1), an expansion sleeve (2) is arranged between the two outer conical sleeves (5), conical surfaces (2-1) are machined at two ends of the inner surface of the expansion sleeve (2), each conical surface (2-1) is matched with each outer conical sleeve (5), external threads (1-2) of the pull rod (1) are matched with the nut (4), and the expansion sleeve (2) can expand along the radial direction by screwing the nut (4).

2. The tube extractor for adjusting the upper and lower tube plates of a heat exchanger according to claim 1, characterized in that the outer diameters of the expansion sleeve (2) and the two outer conical sleeves (5) are smaller than the inner diameter of the heat exchange tube.

3. The tube extractor for adjusting the upper and lower tube plates of a heat exchanger according to claim 1, characterized in that the material of the expansion sleeve (2) is spring steel.

4. The tube extractor for adjusting the upper and lower tube plates of a heat exchanger according to claim 1, further comprising a weight (6), wherein the end of the pull rod (1) is fixedly connected to the weight (6).

Technical Field

The invention relates to a heat exchanger tool, and belongs to the technical field of heat exchanger installation.

Background

The existing petrochemical product needs to adjust the heat exchange tube in the process of passing the heat exchange tube through the tube plate due to the special structure of the product so as to ensure the distance between the upper tube plate and the lower tube plate, only a small section of the tube plate can be inserted in the installation process, the tube sequentially passes through the tube plate after the follow-up process is finished, the preset position is reached, and then the processes such as welding, expansion joint and the like are carried out.

Because the heat exchange tube is "pi" type structure, after the heat exchange tube is installed from the tube sheet, in order to guarantee the interval of two tube sheets, adopt the mode of knocking from the heat exchange tube afterbody, because the structure of heat exchange tube itself, cause the heat exchange tube from the removal on the tube sheet unobvious. The prior art has been developed by inserting an elongated metal rod into the tube and using the prongs at the forward end of the metal rod to pull the tube out of the tube bore. The operation in the pulling-out process has certain dangerousness, which can cause serious scratch of the inner wall of the pipe, and the success rate of pulling-out is not high because the displacement distance of the pipe is longer.

Disclosure of Invention

The invention provides a tube extractor for adjusting an upper tube plate and a lower tube plate of a heat exchanger, aiming at solving the problems that the tail of the heat exchange tube is knocked in the installation process of the existing heat exchange tube with a pi-shaped structure, the effect is not obvious, the inner wall of the heat exchange tube is scratched in a metal rod drawing mode, certain danger exists, and the drawing success rate is low.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a tube drawing device for adjusting upper and lower tube sheet of heat exchanger, including pull rod, expand set, top tight pipe, nut and two outer circular cone covers, be equipped with circular bead and external screw thread on the pull rod, two outer circular cone covers and top tight pipe cover are established on the pull rod in proper order, one of them outer circular cone cover pastes with the circular bead of pull rod mutually, be equipped with the cover that expands between two outer circular cone covers, the both ends processing of the internal surface of cover that expands has the conical surface, every conical surface and every outer circular cone cover cooperation, the external screw thread and the nut cooperation of pull rod, it can make the cover that expands along radial expansion to twist the nut soon.

Preferably, the respective outer diameters of the expansion sleeve and the two outer conical sleeves are smaller than the inner diameter of the heat exchange tube.

Preferably, the material of the expansion sleeve is spring steel.

Preferably, the tube extractor for adjusting the upper tube plate and the lower tube plate of the heat exchanger further comprises a heavy hammer, and the end part of the pull rod is fixedly connected with the heavy hammer.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the expansion pipe is stretched into the heat exchange pipe to be regulated, the nuts on the pull rod are screwed, so that the push pipe and the shoulders on the pull rod respectively extrude the two outer conical sleeves, finally the expansion pipe expands to extrude the inner wall of the heat exchange pipe and expands, and the pull rod is pulled to axially move along the pull rod, so that the heat exchange pipe axially moves. Because the outer surface of the expansion pipe is smooth, the inner wall of the heat exchange pipe cannot be scratched by drawing the expansion pipe, and the expansion pipe is more reliable and safer in expansion mode through extrusion of the two outer conical sleeves.

Drawings

FIG. 1 is a schematic of the present invention;

fig. 2 is a partially enlarged view at I of fig. 1.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.