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CN-224215897-U - Heat exchanger head water inlet structure

CN224215897UCN 224215897 UCN224215897 UCN 224215897UCN-224215897-U

Abstract

The utility model discloses a heat exchanger seal head water inlet structure, which comprises a seal head body, wherein a water inlet is arranged at the upper end of the seal head body, the water inlet is connected with a flow guide assembly extending into the seal head, the flow guide assembly comprises a first flow guide cylinder coaxially connected with the water inlet, a plurality of primary water outlets are circumferentially distributed at the bottom of the first flow guide cylinder, each primary water outlet is connected with a second flow guide cylinder extending downwards, a plurality of secondary water outlets are circumferentially distributed at the bottom of each second flow guide cylinder, and the total flow area of all the secondary water outlets is larger than the flow area of the water inlet. The utility model can spread the high-speed jet of the water inlet to a larger area, reduce the flow velocity of the central area, ensure that the overall flow velocity distribution is more uniform, and reduce the possibility of backflow.

Inventors

  • LIU YI
  • ZHAO ZIYAO
  • CHEN JIANMING
  • CHEN YALI
  • ZHU LEI
  • LI BOKUI

Assignees

  • 江苏科圣特种设备制造有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (7)

  1. 1. The utility model provides a heat exchanger head water inlet structure, includes head body (1), head body (1) upper end is equipped with water inlet (2), its characterized in that water inlet (2) are connected with and extend to the inside water conservancy diversion subassembly of head, the water conservancy diversion subassembly includes first guide cylinder (3) with water inlet (2) coaxial coupling, the bottom circumference of first guide cylinder (3) distributes and has a plurality of one-level delivery ports (4), and every one-level delivery port (4) are connected with downwardly extending's second guide cylinder (5), and the bottom circumference of each second guide cylinder (5) distributes and has a plurality of second grade apopores (6), and the total flow area of all second grade apopores (6) is greater than the flow area of water inlet (2).
  2. 2. The heat exchanger seal head water inlet structure according to claim 1, wherein the lower end face of the first guide cylinder (3) is provided with four primary water outlets (4), and the lower end face of the second guide cylinder (5) is provided with three secondary water outlets (6).
  3. 3. The heat exchanger seal head water inlet structure according to claim 2, wherein the primary water outlets (4) are distributed at equal angles, and the number of the secondary water outlets (6) at the bottom of each second guide cylinder (5) is three and the secondary water outlets are distributed in an equilateral triangle.
  4. 4. A heat exchanger seal head water inlet structure according to claim 3 is characterized in that the central connecting lines of adjacent secondary water outlets (6) of adjacent second guide cylinders (5) form regular octagon arrangement.
  5. 5. A heat exchanger head water inlet structure according to claim 1 or 4, wherein the total flow area of all primary water outlets (4) is larger than the flow area of the water inlet (2), and the total flow area of all secondary water outlets (6) is smaller than the total flow area of all primary water outlets (4).
  6. 6. The heat exchanger seal head water inlet structure according to claim 1, wherein the secondary water outlet (6) is connected with a divergent flow guide pipe (7), and the divergent angle of the flow guide pipe (7) is 10-30 degrees.
  7. 7. A heat exchanger head water inlet structure according to claim 1, wherein the diameters of the first guide cylinder (3) and the second guide cylinder (5) are linearly gradually expanded along the axial direction from the opening end to the bottom end.

Description

Heat exchanger head water inlet structure Technical Field The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger head water inlet structure. Background The shell-and-tube heat exchanger is used as heat exchange equipment widely applied in the industrial field, the core structure of the shell-and-tube heat exchanger takes the wall surface of a tube bundle in a closed shell as a heat transfer interface, and the heat transfer of cold and hot fluid is realized through dividing wall type heat exchange, so that the temperature regulation or the energy recovery is realized. The equipment is a standard configuration in the fields of petrochemical industry, energy power and the like due to the advantages of simple structure, low manufacturing cost, wide flow section, convenience in cleaning and maintenance and the like. In the existing shell-and-tube heat exchanger, front and rear seal heads of the shell respectively bear the functions of fluid distribution and collection. Wherein, a horizontal baffle plate is arranged in the seal head at one side to separate the water inlet and outlet chambers, and the upper end and the lower end of the seal head are respectively provided with a single water inlet and a single water outlet. In the prior art, the water inlet adopts a straight-through structure to be directly communicated with the end socket cavity, under the condition of a single water inlet, high-speed jet flows are concentrated at a narrow water inlet, so that the central flow velocity is too high, a low-pressure area is formed around the central flow velocity, and therefore, a pressure gradient is generated, and backflow is easy to induce. Disclosure of utility model The utility model aims to provide a water inlet structure of a heat exchanger seal head, which can spread high-speed jet flow of a water inlet onto a larger area, reduce the flow velocity of a central area, ensure that the overall flow velocity distribution is more uniform, and reduce the possibility of backflow. The technical scheme includes that the heat exchanger seal head water inlet structure comprises a seal head body, wherein a water inlet is formed in the upper end of the seal head body, the water inlet is connected with a flow guide assembly extending into the seal head, the flow guide assembly comprises a first flow guide cylinder coaxially connected with the water inlet, a plurality of first-stage water outlets are circumferentially distributed at the bottom of the first flow guide cylinder, each first-stage water outlet is connected with a second flow guide cylinder extending downwards, a plurality of second-stage water outlets are circumferentially distributed at the bottom of each second flow guide cylinder, and the total flow area of all the second-stage water outlets is larger than that of the water inlet. According to a further improved scheme, four primary water outlets are formed in the lower end face of the first guide cylinder, and three secondary water outlets are formed in the lower end face of the second guide cylinder. According to a further improved scheme, four primary water outlets are arranged and distributed at equal angles, and the number of secondary water outlets at the bottom of each second guide cylinder is three and distributed in an equilateral triangle. According to a further improvement scheme, the central connecting lines of adjacent secondary water outlets of adjacent second guide cylinders form regular octagon arrangement. The utility model further improves the scheme that the total flow area of all the primary water outlets is larger than the flow area of the water inlet, and the total flow area of all the secondary water outlets is smaller than the total flow area of all the primary water outlets. According to a further improvement scheme, the secondary water outlet is connected with a divergent flow guide pipe, and the divergence angle of the flow guide pipe is 10-30 degrees. According to a further improvement of the utility model, the diameters of the first guide cylinder and the second guide cylinder are linearly gradually expanded along the axial direction from the opening end to the bottom end. The utility model has the beneficial effects that: According to the utility model, concentrated water flow at the water inlet is dispersed step by step through the flow distribution structure of the two-stage guide cylinder, the coverage area is enlarged, the high-speed jet flow originally concentrated at the narrow inlet is spread to a larger area, so that the water flow forms diffusion flow inside the seal head, the flow velocity in the central area is obviously reduced, the peripheral flow velocity is relatively improved, and the overall flow velocity distribution is more uniform. The low pressure region is dispersed to a larger area, the local low pressure effect is reduced, and the pressure gradient between the center and the periphery is reduced. In the utili