Light sealing strip of plate-fin heat exchanger

Abstract

The light sealing strip comprises a sealing strip body, the cross section of the sealing strip body is of a bilateral symmetry structure, a left waist face is arranged on the outer left side of the sealing strip body, a first positioning clamping groove is formed in the lower portion of the left waist face in the length direction of the left waist face, and a right waist face is arranged on the outer right side of the sealing strip body. A first positioning clamping groove is formed in the lower portion of the left waist face in the length direction, a second positioning clamping groove is formed in the lower portion of the right waist face in the length direction, a lower concave face is arranged at the bottom of the outer side of the seal strip body, and the left waist face and the right waist face can be accurately clamped between the partition plates on the two sides under the cooperation of the first positioning clamping groove and the second positioning clamping groove, so that the conditions of linear deviation and clamping dislocation in the welding process are avoided; and a plurality of welding strengthening grooves are further formed in the welding extension lines of the clamping grooves, the grooves can be automatically filled with brazing materials, and therefore the connection strength of weld lines is improved, the welding firmness and sealing performance of the sealing strip are effectively improved under mutual cooperation, and normal use of the heat exchanger is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger accessories, specifically a lightweight sealing strip for a plate-fin heat exchanger. Background Technology

[0002] The sealing strip of a plate-fin heat exchanger is an important component, mainly used for fluid separation and composite brazing. The sealing strip is typically made of a metal composite plate, and its main function is to isolate the medium from the external environment, ensuring the stability and efficiency of the heat exchange process. In related technologies, such as the patent in publication number CN217083429U applied to the sealing strip of a plate-fin heat exchanger, the sealing strip body is a symmetrical elongated strip. The left, right, and upper surfaces of the sealing strip body are all flat, and a recessed portion is provided on the lower surface of the sealing strip body. The recessed portion and the left surface form an arc-shaped surface with their centers inside the sealing strip body, and the recessed portion and the right surface also form an arc-shaped surface with their centers inside the sealing strip body. The recessed portion is symmetrical, and its axis of symmetry is located on the vertical center line of the sealing strip body. Several rectangular through holes are opened in the middle of the sealing strip body. This utility model can enhance the connection strength between the sealing strip and the sealing plate, making the sealing strip less likely to detach from the sealing plate.

[0003] The above solution has some shortcomings in practical application. It involves welding the left surface of the seal to the lower sealing plate of the component and the right surface to the upper sealing plate of the component. However, the seals and baffles of the heat exchanger are prone to misalignment during welding, which may lead to linear displacement during the welding process and compromise the welding quality. Furthermore, during later use, the already weak weld surface may crack due to long-term high-speed fluid impact, affecting the normal operation of the heat exchanger. In addition, since this type of plate-fin heat exchanger uses a large number of seals, we must also consider the overall weight of the heat exchanger after the seals are assembled, while minimizing material waste. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a lightweight sealing strip for plate-fin heat exchangers, in order to solve the problems mentioned in the background art where the sealing strip and baffle of the prior art plate-fin heat exchanger are prone to misalignment during welding, which may lead to linear displacement during welding; and the weld surface may crack due to long-term high-speed fluid impact during later use; and we also need to consider the overall weight of the heat exchanger after the sealing strip is assembled.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lightweight sealing strip for a plate-fin heat exchanger, comprising a sealing strip body (10), wherein the cross-section of the sealing strip body (10) is symmetrical, the outer left side of the sealing strip body (10) has a left waist surface (110), the lower part of the left waist surface (110) has a positioning groove one (1101) along its length direction, the outer right side of the sealing strip body (10) has a right waist surface (120), the lower part of the right waist surface (120) has a positioning groove two (1201) along its length direction, and the outer bottom of the sealing strip body (10) has a concave surface (130).

[0007] As a preferred embodiment of the lightweight sealing strip for a plate-fin heat exchanger described in this utility model, the lateral distance between the first positioning slot (1101) and the second positioning slot (1201) matches the distance between the partitions on both sides, and the lateral distance between the left waist surface (110) and the right waist surface (120) is greater than the distance between the partitions on both sides.

[0008] As a preferred embodiment of the lightweight sealing strip for a plate-fin heat exchanger described in this utility model, the upper edges of the positioning slot one (1101) and the positioning slot two (1201) have a plurality of welding reinforcement grooves (140) along their length direction, and the plurality of welding reinforcement grooves (140) are distributed at equal intervals.

[0009] As a preferred embodiment of the lightweight sealing strip for a plate-fin heat exchanger described in this utility model, the bottom edges of both sides of the concave surface (130) are connected to the positioning slot one (1101) and positioning slot two (1201) with an acute angle structure without transition, and the inner central axis of the concave surface (130) is an arc-shaped surface (1301) along its length direction.

[0010] As a preferred embodiment of the lightweight sealing strip for a plate-fin heat exchanger described in this utility model, the sealing strip body (10) further has a through cavity (150) that is consistent with its outer contour, and the through cavity (150) extends through the sealing strip body (10) along its length direction.

[0011] As a preferred embodiment of the lightweight sealing strip for a plate-fin heat exchanger described in this utility model, a reinforcing rib (160) is laterally connected along its length at the center of the inner side of the cavity (150), and the two sides of the reinforcing rib (160) abut against the left waist surface (110) and the right waist surface (120) respectively. There is a clearance gap (170) between the bottom of the reinforcing rib (160) and the highest point of the central axis of the concave surface (130).

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (i) The lightweight sealing strip of this plate-fin heat exchanger can be precisely positioned between the two side partitions with the cooperation of positioning slot one (1101) and positioning slot two (1201) on the left waist side (1100) and right waist side (1201), avoiding linear offset and misalignment during welding. Furthermore, several welding reinforcement grooves (140) are provided on the welding extension line of the groove, which can automatically fill the grooves with brazing material, thereby improving the connection strength of the weld line. With their cooperation, the welding firmness and sealing performance of the sealing strip are effectively improved, ensuring the normal use of the heat exchanger.

[0014] (ii) The lightweight seal of this plate-fin heat exchanger greatly reduces the weight of a single seal by setting a cavity (150) inside the seal body (10) that matches its contour. Furthermore, with the cooperation of the reinforcing ribs (160), the structural strength and stress rationality of the seal are guaranteed, thereby reducing the overall weight of the heat exchanger and the waste of materials. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the seal of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional end face structure of the seal of this utility model.

[0017] In the diagram: 10, seal body; 110, left waist surface; 1101, positioning slot one; 120, right waist surface; 1201, positioning slot two; 130, concave surface; 1301, arc-shaped surface; 140, welding reinforcement groove; 150, through cavity; 160, reinforcing rib; 170, clearance gap. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0021] Figures 1-2 The diagram shown is a complete structural schematic of a lightweight sealing strip for a plate-fin heat exchanger according to this utility model. Please refer to [link / reference]. Figures 1-2 This embodiment of a lightweight sealing strip for a plate-fin heat exchanger includes a sealing strip body 10. The cross-section of the sealing strip body 10 is symmetrical. The outer left side of the sealing strip body 10 has a left waist surface 110, and the lower part of the left waist surface 110 has a positioning groove 1101 along its length direction. The outer right side of the sealing strip body 10 has a right waist surface 120, and the lower part of the right waist surface 120 has a positioning groove 1201 along its length direction. The bottom outer side of the sealing strip body 10 has a concave surface 130.

[0022] In this embodiment, the lateral distance between positioning slot one 1101 and positioning slot two 1201 matches the distance between the partitions on both sides, and the lateral distance between the left waist surface 110 and the right waist surface 120 is greater than the distance between the partitions on both sides. The upper edges of positioning slot one 1101 and positioning slot two 1201 have a plurality of welding reinforcement grooves 140 along their length direction, and these grooves are evenly spaced. Specifically, the left waist surface 110 and the right waist surface 120, with the cooperation of positioning slot one 1101 and positioning slot two 1201, can be precisely positioned between the partitions on both sides, avoiding linear offset and misalignment during welding. Furthermore, a plurality of welding reinforcement grooves 140 are provided along the welding extension line of the slots, allowing brazing filler to automatically fill the grooves, thereby improving the connection strength of the weld line. Together, these features effectively improve the welding firmness and sealing performance of the seal, ensuring the normal operation of the heat exchanger.

[0023] In this embodiment, the bottom edges of the concave surface 130 form a seamless acute-angle structure with the connected positioning slot 1101 and positioning slot 2 1201. The inner central axis of the concave surface 130 is an arc-shaped surface 1301 along its length. It can be understood that the seamless acute-angle structure on both sides of the bottom edge of the concave surface 130 effectively prevents disturbance and damage to the welding line caused by high-speed scouring fluid, and the arc-shaped surface 1301 naturally vortexes the fluid impact force, avoiding stress concentration.

[0024] In this embodiment, the seal body 10 also has a cavity 150 that conforms to its outer contour, and the cavity 150 extends through the seal body 10 along its length. A reinforcing rib 160 is laterally connected at the center of the inner side of the cavity 150 along its length, and the two sides of the reinforcing rib 160 abut against the left waist surface 110 and the right waist surface 120 respectively. There is a clearance gap 170 between the bottom of the reinforcing rib 160 and the highest point of the central axis of the concave surface 130. It is understood that, through the provided cavity 150, and in conjunction with the reinforcing ribs 160 and the clearance gap 170, when the concave surface 130 is impacted, it can provide a certain degree of slight buffering against the strong extrusion pressure of the fluid, resulting in slight benign deformation on both sides of the lower part of the seal, thereby reducing weld fracture and leakage caused by concentrated stress. In addition, in this embodiment, by providing a cavity 150 inside the seal body 10 that matches its contour, the weight of a single seal is greatly reduced, and with the cooperation of the reinforcing ribs 160, the structural strength and stress rationality of the seal are ensured, thereby reducing the overall weight of the heat exchanger and the waste of materials.

[0025] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A plate-fin heat exchanger light-weight seal, characterized by The application relates to a seal body (10) which is left-right symmetrical in cross section, the outer left side of the seal body (10) is provided with a left waist surface (110), the lower part of the left waist surface (110) is provided with a positioning clamping groove I (1101) along the length direction, the outer right side of the seal body (10) is provided with a right waist surface (120), the lower part of the right waist surface (120) is provided with a positioning clamping groove II (1201) along the length direction, and the bottom of the outer side of the seal body (10) is provided with a lower concave surface (130).

2. A light-weight seal for plate-fin heat exchangers according to claim 1, characterized in that: The transverse distance between the positioning clamping groove I (1101) and the positioning clamping groove II (1201) matches the distance between the two side partitions, and the transverse distance between the left waist surface (110) and the right waist surface (120) is greater than the distance between the two side partitions.

3. A light-weight seal for plate-fin heat exchangers according to claim 1, characterized in that: The upper edges of the positioning clamping groove I (1101) and the positioning clamping groove II (1201) are provided with a plurality of welding reinforcement grooves (140) along the length direction, and the plurality of welding reinforcement grooves (140) are equidistantly distributed.

4. A light seal for plate-fin heat exchangers according to claim 1, characterized in that: The two bottom edges of the lower concave surface (130) and the positioning clamping groove I (1101) and the positioning clamping groove II (1201) connected therebetween are sharp angle structures without transition, and the middle axis part of the inner side of the lower concave surface (130) is an arc surface (1301) along the length direction.

5. A light-weight seal for plate-fin heat exchangers according to claim 1, characterized in that: The seal body (10) is further provided with a through cavity (150) which is consistent with the outer contour, and the through cavity (150) extends through along the length direction of the seal body (10).

6. A light seal for plate-fin heat exchangers according to claim 5, characterized in that: The inner side of the through cavity (150) is provided with a reinforcing rib (160) which is connected laterally along the length direction, and the two sides of the reinforcing rib (160) abut against the left waist surface (110) and the right waist surface (120) respectively, and the reinforcing rib (160) is provided with an avoiding gap (170) between the bottom and the highest point of the middle axis of the lower concave surface (130).

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