Baffle device for all-welded plate heat exchanger for nuclear power
By installing reinforcement plates at both ends of the baffle plate heat exchanger and setting up flow blocks, the leakage and short circuit problems caused by the gap between the baffle plate and the core plate in traditional heat exchangers are solved, and the replacement is improved Thermal efficiency and simplifies the maintenance process.
Patent Information
- Application Number
- CN202420994782.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-09
AI Technical Summary
There is a large gap between the baffle plate and the core plate of the traditional fully welded plate heat exchanger, resulting in leakage and short circuit, which reduces the heat exchange efficiency and inlet and outlet temperatures not meeting the standards, and it is difficult to repair and replace later.
Install reinforcement plates at both ends of the baffle pair, and a flow block is installed on the reinforcement plate to avoid leakage problems at the segments. The flow block is made of polytetrafluoroethylene material. An effective flow block is formed by opening grooves on the bent edge of the reinforcement plate and assembling the flow block and the limiting block.
The medium is blocked through the blocking block, forming turbulence, reducing the dead zone of the flow channel of the medium, avoiding leakage at the segmented path, improving heat exchange efficiency, and simplifying the maintenance and replacement process.
Smart Images
Figure CN222438648U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plate heat exchangers, specifically a baffle for a fully welded plate heat exchanger for nuclear power Background Art
[0002] The fully welded plate heat exchanger for nuclear power is an important equipment for cooling and heating in nuclear power plants. Plate heat exchangers have been widely used in many industrial fields due to their compact structure, small footprint, and high heat exchange efficiency. The traditional fully welded plate heat exchanger is a baffle component set to increase the flow rate. The baffle is formed by plasma cutting with a 6mm-10mm metal plate and connected to the core by welding when assembled. When this structure is used, there is a large gap between the baffle and the core plate pair, resulting in leakage and short circuit, causing the flow rate of the material flowing through the plate pair to decrease, resulting in a decrease in the overall heat exchange efficiency of the heat exchanger, and the inlet and outlet temperatures do not meet the standards. Because the core and the baffle are connected by welding, it is difficult to repair and replace them later. Utility Model Content
[0003] The utility model aims to provide a baffle for a fully welded plate heat exchanger for nuclear power, by installing reinforcing plates at both ends of a baffle pair, and arranging flow blocks on the reinforcing plates to avoid leakage problems at the split-pass.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A baffle for a fully welded plate heat exchanger for nuclear power comprises a baffle pair, the left and right ends of the baffle pair are respectively welded to the middle of the inner wall of a reinforcing plate, a support assembly is respectively arranged on the upper and lower sides of the baffle pair, and the left and right ends of the support assembly are connected to the inner wall of the reinforcing plate; the rear side of the reinforcing plate is bent inwardly to form a bending edge, and grooves are provided in the middle of the upper and lower sides of the bending edge, and a baffle block is assembled in the upper groove, and the baffle block comprises a baffle plate and a limit block formed by die-casting, the limit block is clamped on the inner wall of the bending edge, and the inner wall of the baffle plate is fitted with the outer wall of the bending edge.
[0006] Preferably, the spoiler is a T-shaped block, and the area of the fitting surface between the spoiler and the bent edge is larger than the outer surface of the spoiler.
[0007] Preferably, the baffle pair comprises two baffle plates welded back to back to each other, the baffle plates are punched from thin metal plates, and the thin metal plates are punched with reinforcing ribs in the shape of a square frame bulging toward one side.
[0008] Preferably, the front and rear sides of the baffle plate are provided with folded edges, and the folded edges of the upper and lower baffle plates form butt joint edges that match the opposite sides of the plate heat exchanger core plate, and sealing strips are installed between the butt joint edges. The side edges of the heat exchanger chip are inserted into the butt joint edges and are firmly clamped.
[0009] Preferably, the support assembly includes a fixing nut and a feed nut respectively welded on the inner walls of the two side reinforcing plates, the fixing nut is welded to one end of the support rod, an internal thread is provided on the inner wall of the other end of the support rod, and the other end of the support rod is connected to the feed nut through an adjusting stud.
[0010] Preferably, the baffle is made of polytetrafluoroethylene material.
[0011] The utility model is installed on the outside of the core of the heat exchanger when in use. When the medium flows through the baffle, the baffle blocks the medium, causing the medium to flow in the reverse direction, forming a Turbulence Flow reduces the dead zone of the medium flow channel, avoids leakage at the branch point, and improves the heat exchange efficiency.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] The utility model provides reinforcing plates with baffles at both ends of the baffle plate pair, and the baffles block the medium flowing through the baffle to form turbulence, reduce dead zones in the flow channel, and reduce leakage problems at the split-pass, thereby improving heat exchange efficiency.
[0014] The baffle pair in the utility model is formed by two baffle pieces of the same shape being welded back to back by a resistance welding machine, and there is a certain gap between the baffle pieces after welding; the baffle pieces are made of metal thin plates processed by dies such as pressing dies, flanging, and punching, thereby reducing the material manufacturing cost; the thin plates are stamped with reinforcing ribs protruding outwards, thereby ensuring the rigidity of the baffle pieces.
[0015] The outer edge of the baffle plate in the utility model is provided with a folded edge, and the heat exchanger core can be directly plugged into the butt edge for a firm connection, thus avoiding the welding process and improving the assembly efficiency.
[0016] The utility model installs a support assembly between two reinforcing plates, thereby enhancing the strength of the baffle plate pair, and the length of the support assembly can be adjusted by adjusting the studs.
[0017] The utility model has the advantages of simple structure, convenient assembly and disassembly, strong interchangeability and easy batch production. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model;
[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle baffle block;
[0020] Figure 3 yes Figure 2 A schematic cross-sectional view of the middle baffle block;
[0021] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle reinforcement plate;
[0022] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle baffle;
[0023] Figure 6 yes Figure 2 A schematic diagram of the structure of the middle baffle pair;
[0024] Figure 7 yes Figure 1 A schematic diagram of the structure of the middle support assembly;
[0025] Figure 8 It is a schematic diagram of the assembly of the utility model and the heat exchanger chip;
[0026] In the figure: 1. baffle pair, 2. support assembly, 3. reinforcement plate, 4. spoiler, 5. sealing strip, 6. bending edge, 7. groove, 8. spoiler, 9. limit block, 10. baffle plate, 11. fixing nut, 12. support rod, 13. adjustment stud, 14. feed nut. DETAILED DESCRIPTION
[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0028] like Figures 1 to 8 A baffle for a fully welded plate heat exchanger for nuclear power shown in the figure comprises a baffle pair 1, the left and right ends of the baffle pair 1 are respectively welded to the middle of the inner wall of a reinforcing plate 3, a support assembly 2 is respectively arranged on the upper and lower sides of the baffle pair 1, and the left and right ends of the support assembly 2 are connected to the inner wall of the reinforcing plate 3; the rear side of the reinforcing plate 3 is bent inward to form a bending edge 6, and a groove 7 is provided in the middle of the upper and lower sides of the bending edge 6, and a baffle block 4 is assembled in the upper groove 7, and the baffle block 4 comprises a baffle plate 8 and a limit block 9 formed by die-casting, and the limit block 9 is clamped on the inner wall of the bending edge 6, and the inner wall of the baffle plate 8 is in contact with the outer wall of the bending edge 6.
[0029] The spoiler 8 is a T-shaped block, and the area of the contact surface between the spoiler 8 and the bent edge 6 is larger than the outer surface of the spoiler 8 .
[0030] The baffle plate pair 1 comprises two baffle plate pieces 10 welded back to back to each other. The baffle plate pieces 10 are formed by punching a thin metal plate, and a square frame-shaped reinforcing rib bulging toward one side is punched on the thin metal plate.
[0031] The baffle plate 10 is provided with folded edges on both sides, and the folded edges of the upper and lower baffle plates 10 form butt joints that match the opposite sides of the plate heat exchanger core plate. A sealing strip 5 is installed between the butt joints, and the side edges of the heat exchanger chip are inserted into the butt joints for firm clamping.
[0032] The support assembly 2 includes a fixing nut 11 and a feed nut 14 respectively welded on the inner walls of the reinforcing plates 3 on both sides. The fixing nut 11 is welded to one end of the support rod 12. An internal thread is provided on the inner wall of the other end of the support rod 12. The other end of the support rod 12 is connected to the feed nut 14 through an adjusting stud 13.
[0033] The baffle is made of polytetrafluoroethylene material.
[0034] The utility model is installed on the outside of the core of the heat exchanger when in use. When the medium flows through the baffle, the baffle block will block the medium, causing the medium to flow in the reverse direction, forming a Turbulence Flow reduces the dead zone of the medium flow channel, avoids leakage at the branch point, and improves the heat exchange efficiency.
[0035] The utility model provides reinforcing plates with baffles installed at both ends of the baffle plate pair. The baffles block the medium flowing through the baffle to form turbulence, reduce dead zones in the flow channel, and reduce leakage problems at the split-pass points, thereby improving heat exchange efficiency and providing effective guarantee for the stable operation of the heat exchanger.
[0036] The above are only preferred examples of the present invention. It should be noted that for ordinary technicians in this field, under the technical enlightenment provided by the present invention, other equivalent deformations and improvements can also be made, which should also be regarded as the protection scope of the present invention.
Claims
1. A baffle for a fully welded plate heat exchanger for nuclear power, comprising a baffle pair (1), characterized in that: The left and right ends of the baffle plate pair (1) are respectively welded to the middle of the inner walls of the two reinforcing plates (3); a support assembly (2) is respectively provided on the upper and lower sides of the baffle plate pair (1); the left and right ends of the support assembly (2) are connected to the inner wall of the reinforcing plate (3); the rear side of the reinforcing plate (3) is bent inward to form a bending edge (6); a groove (7) is provided in the middle of the upper and lower sides of the bending edge (6); a baffle block (4) is mounted in the upper groove (7); the baffle block (4) comprises a baffle plate (8) and a limit block (9) formed by die-casting; the limit block (9) is clamped on the inner wall of the bending edge (6); the inner wall of the baffle plate (8) is in contact with the outer wall of the bending edge (6).
2. The baffle according to claim 1, characterized in that: The spoiler (8) is a T-shaped block, and the area of the contact surface between the spoiler (8) and the bent edge (6) is larger than the outer surface of the spoiler (8).
3. The baffle according to claim 1 or 2, characterized in that: The baffle plate pair (1) comprises two baffle plate pieces (10) welded back to back to each other, the baffle plate pieces (10) being formed by stamping a thin metal plate, and a square frame-shaped reinforcing rib bulging toward one side is stamped on the thin metal plate.
4. The baffle according to claim 3, characterized in that: The baffle plate (10) is provided with folded edges on both sides, front and rear, and the folded edges of the upper and lower baffle plates (10) form butt joint edges that match the opposite side edges of the plate heat exchanger core plate. A sealing strip (5) is installed between the butt joint edges, and the side edges of the heat exchanger core are inserted into the butt joint edges for secure clamping.
5. The baffle according to claim 4, characterized in that: The support assembly (2) comprises a fixing nut (11) and a feed nut (14) respectively welded to the inner walls of the reinforcing plates (3) on both sides; the fixing nut (11) is welded to one end of a support rod (12); an inner thread is provided on the inner wall of the other end of the support rod (12); and the other end of the support rod (12) is connected to the feed nut (14) via an adjusting stud (13).
6. The baffle according to claim 5, characterized in that: The flow blocking block is made of polytetrafluoroethylene material.