CN210346451U

CN210346451U - Baffle grid connection structure

Info

Publication number: CN210346451U
Application number: CN201921128839.8U
Authority: CN
Inventors: 王玉; 钱江; 戴洋; 孙志涛; 徐大鹿; 黄伟昌; 孟多南; 李秋; 王福新; 李长宝
Original assignee: Shenyang Huibo Heat Energy Equipment Co ltd
Current assignee: Shenyang Huibo Heat Energy Equipment Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-17
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a baffling bars connection structure, including many distance poles, the equidistance is provided with on the distance pole with baffling bars matched with recess, baffling bars joint and welded fastening in the recess, distance pole stringing injects the circle and the baffling bars is concentric and be greater than the baffling bars internal diameter, and the blind hole that sets up on the other end of distance pole and the tube sheet matches and merges welded fastening. 4-6 distance rods are evenly distributed along the circumferential direction. The baffling bars are clamped in the grooves through baffling rings and are welded and fixed. The distance rod is cylindrical, and the diameter of the distance rod is equal to or smaller than that of the heat exchange tube. The utility model discloses have: 1. the connection is reliable; 2. the distance rod has high rigidity; 3. the positioning precision is high; 4. the width of the baffle ring is small, and the like. The structure effectively solves the defects of poor connection reliability and large influence on heat transfer efficiency in the prior art.

Description

Baffle grid connection structure

Technical Field

The utility model relates to a heat exchanger technical field especially relates to a baffling bars connection structure.

Background

The baffle grid heat exchanger is a novel shell-and-tube heat exchanger, can avoid vibration damage of a heat exchange tube caused by baffle plates, and simultaneously reduces pressure drop of fluid passing through the heat exchanger. A classic baffle heat exchanger tube bundle is shown in fig. 1 and includes a heat exchanger cylinder, heat exchange tubes, tube plates, baffle grids, and the like. The planes of the deflecting grids are vertical to the heat exchange tubes, and every two adjacent deflecting grids limit the displacement of the heat exchange tubes in a certain direction. As shown in fig. 1, the baffles A, B define the horizontal displacement of the heat exchange tubes; the deflector grid C, D defines the vertical displacement of the heat exchange tubes.

In order to connect a plurality of baffle grids (usually a multiple of 4), two methods are generally used at the present stage: one is to adopt the flat steel connection method as shown in figure 1, namely, a rectangular notch is processed on the outer side of a baffle ring of a baffle grid part, then the flat steel is inserted into the rectangular notch for spot welding and fixing, the connection form of the baffle plate and a slide way in a common heat exchanger is similar, and one end of the flat steel is also welded and fixed with a tube plate. The method is not easy to ensure that the deflecting grids are vertical to the heat exchange tube, the spacing of the deflecting grids is not easy to be accurately controlled, and the gap also influences the width (inner and outer radius difference) and the strength of the deflecting ring. The other method adopts the traditional pull rod-distance tube structure, the connection is reliable, but the width of the annular baffling ring is widened under the influence of the diameter of the distance tube, so that the limiting circle of the heat exchange tube distribution is reduced, and the tube distribution rate is reduced; the width of the baffle ring is widened, so that the dead zone range of the shell-side fluid is enlarged, and the heat exchange efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a baffling bars connection structure to solve the problem among the prior art.

The utility model discloses a realize through following technical scheme: the utility model provides a baffling bars connection structure for fix baffling bars in the heat exchanger, the heat exchanger includes heat exchanger barrel, heat exchange tube, tube sheet, baffling bars includes baffling circle and baffling pole, its characterized in that: the baffle bar connecting structure comprises a plurality of distance rods, grooves matched with the baffle bars are equidistantly arranged on the distance rods, the baffle bars are clamped in the grooves and welded and fixed, the distance rod distribution pipes limit circles and the baffle bars to be concentric and larger than the inner diameter of the baffle bars, and one ends of the distance rods are matched with blind holes formed in the tube plate and welded and fixed.

Further: 4-6 distance rods are evenly distributed along the circumferential direction.

Further: the baffling bars are clamped in the grooves through baffling rings and are welded and fixed.

Further: the distance rod is cylindrical, and the diameter of the distance rod is equal to or smaller than that of the heat exchange tube.

The utility model has the advantages that: 1. the connection is reliable; because the whole baffle grid is embedded in the groove of the distance rod and is added with the subsequent spot welding of the position, the connection reliability is enhanced, and theoretically, the baffle grid can not fall off even if the spot welding part is completely corroded during service; 2. the distance rod has high rigidity; because the diameter of the distance rod is equal to or slightly smaller than that of the heat exchange tube, the rigidity of the distance rod is far greater than that of a common pull rod, and the distance rod can show the advantages in a vertical structure; 3. the positioning precision is high; the plurality of distance rods can be used for processing grooves together, the consistency is good, and the requirement that the plane of the baffle grid is vertical to the heat exchange tube is well ensured; 4. The width of the baffling ring is smaller; because the baffle ring is not provided with redundant rectangular notches (in a flat steel connection mode) and pull rod holes (pull rods-distance rod structures), the baffle ring can be thinner, the material cost can be directly reduced, the pipe distribution rate can be improved, the fluid dead zone range can be reduced, and the heat transfer is facilitated.

It can be seen from the above description that, compared with the prior art, the structure has many advantages, and the reliability of connection, the heat transfer efficiency increase, the cost reduction, and the manufacturing convenience are all improved.

Drawings

Fig. 1 is a schematic view of a conventional rod baffle structure.

FIG. 2 is a connection structure diagram of the present invention;

figure 3 shows the distance rod in cooperation.

Description of reference numerals: the heat exchanger comprises a cylindrical body 1, a heat exchange tube 2, a tube plate 3, a baffle grid 4, a baffle ring 41, a baffle rod 42, a distance rod 5, a groove 6 and a blind hole 7.

Detailed Description

Fig. 1-3 show a baffle grid connection structure of the present invention, which is used to fix a baffle grid 4 in a heat exchanger, wherein the heat exchanger comprises a heat exchanger cylinder 1, a heat exchange tube 2, and a tube plate 3, and the tube plate is provided with a plurality of blind holes 7; the baffle 4 comprises a baffle ring 41 and a baffle rod 42. The baffle bar connection structure comprises a plurality of distance rods 5 which are arranged in a circumferential and equiangular mode, a plurality of grooves 6 matched with the baffle bar are arranged on the distance rods equidistantly, the baffle bar is clamped in the grooves and is welded and fixed with the distance rods, distance rod distributing pipes limit circles (the minimum circles surrounding all the distance rods, namely the outer diameters of the circles where the distance rods are located) and the baffle bar are concentric and are larger than the inner diameter of the baffle bar (specifically, the inner diameter of a baffle ring of the baffle bar), and one ends of the distance rods are matched with blind holes 7 arranged on a pipe plate and are welded and fixed.

Preferably: 4-6 distance rods are evenly distributed along the circumferential direction.

Preferably: the baffling bars are clamped in the grooves through baffling rings and are welded and fixed.

Preferably: the distance rod is cylindrical, and the diameter of the distance rod is equal to or smaller than that of the heat exchange tube.

Preferably: the baffling ring is formed by rolling a plate material. The baffle ring is convenient to manufacture and low in cost, the rolled circular ring has greater advantages compared with a circular ring cut by a whole plate, and when the diameter of the circular ring is larger, the thickness of the rolled circular ring is obviously increased to be more beneficial than that of the cut circular ring. The diameter of the rolled circular ring can be adjusted very conveniently by only adjusting the blanking length.

The structure of the present invention is further explained by combining the using method as follows:

the utility model discloses the structure, through reasonable adjustment baffling circle width and height, the size of the definite and recess of distance pole diameter in addition makes its cooperation inseparable. Firstly, according to the diameter of the heat exchanger and the span condition of the baffle grid, the thickness (namely the width of the baffle ring) and the height of the baffle ring rolled plate are selected, the thickness of the plate can be 8-16 mm and the height can be 15-30 mm under the common condition, and the large value is selected when the diameter of the heat exchanger is large and the span is large. After the deflecting ring is rolled, welded and rounded, a deflecting rod is welded to assemble a deflecting grid; then, grooves on the distance rods are machined according to the design distance of the baffle grids, and the depth of the grooves is preferably that the grooves do not interfere with the inner diameter of the baffle ring after installation. The distance rod is a solid bar, and the outer diameter of the distance rod is generally equal to or slightly smaller than the diameter of the heat exchange tube. The distance rods on each heat exchanger are combined together for clamping and processing, and the processing surface of the groove is vertical to the axis of the bar, so that the plane of the baffle grid is vertical to the heat exchange tube during installation. Inserting the distance rods into corresponding blind hole positions on the tube plate respectively to ensure that the opening direction of the groove is positioned in the tangential direction of the distance rod cloth tube limiting circle and is welded firmly; then, the baffle grid is sleeved in turn (see fig. 2, wherein for the convenience of explanation, the four quadrant positions in the baffle ring are sequentially shown as A, B, C, D parts of the baffle grid); a, B, C, D are sleeved in turn, and are circulated in turn, and the baffle grids and the distance rods are welded firmly by spot welding close to the first sleeve of the tube plate. At this point, all the barriers are fully installed. Of course, the distance rod and the baffle grid can be connected in advance, but one end of the distance rod can be ensured to be stably inserted into the corresponding blind hole position on the tube plate. The subsequent installation is like a conventional baffled heat exchanger.

The structure is characterized in that a plurality of distance rods which are symmetrically arranged and provided with equidistant grooves are connected with the deflecting grids, the groove distance is equal to the designed distance of the deflecting grids, the distance rod distribution pipes limit the circle slightly larger than the inner diameter of the deflecting ring, the groove width is slightly larger than the height of the deflecting ring, the deflecting ring is just clamped in the groove for positioning during installation, and then the deflecting ring is fixed with the deflecting ring through spot welding. One end of the distance rod is inserted into a corresponding blind hole of the tube plate and is welded firmly so as to ensure the integrity of connection. The distance rod has the functions of a distance tube and a pull rod, the space for arranging the tube is not occupied, and the baffle ring is rolled by using a plate material. The heat exchange tube distribution rate can be improved to the maximum extent, and the flow dead zone is reduced.

Claims

1. The utility model provides a baffling bars connection structure for fix baffling bars in the heat exchanger, the heat exchanger includes heat exchanger barrel, heat exchange tube, tube sheet, baffling bars includes baffling circle and baffling pole, its characterized in that: the baffle bar connecting structure comprises a plurality of distance rods, grooves matched with the baffle bars are equidistantly arranged on the distance rods, the baffle bars are clamped in the grooves and welded and fixed, the distance rod distribution pipes limit circles and the baffle bars to be concentric and larger than the inner diameter of the baffle bars, and one ends of the distance rods are matched with blind holes formed in the tube plate and welded and fixed.

2. The baffle grid connection structure of claim 1, wherein: 4-6 distance rods are evenly distributed along the circumferential direction.

3. The baffle grid connection structure of claim 1, wherein: the baffling bars are clamped in the grooves through baffling rings and are welded and fixed.

4. The baffle grid connection structure of claim 1, wherein: the distance rod is cylindrical, and the diameter of the distance rod is equal to or smaller than that of the heat exchange tube.