An intermediate plate assembly on a plate heat exchanger

Abstract

This utility model proposes an intermediate plate assembly for a plate heat exchanger, including two spaced and fixedly connected panels, with an intermediate tube between the two panels. Each panel has an opening corresponding to the intermediate tube. It also includes an L-shaped inner tube, which is formed by connecting two tube bodies, with the connection point of tube bodies one and two being an elbow structure. Tube body one is connected inside the intermediate tube, and the side wall of the intermediate tube has a through hole for tube body two to pass through. At both ends of the intermediate tube are sealing plates one and two, respectively, adapted to and rotatably connected to the openings. Sealing plate one has a connecting hole that mates with tube body one. Sealing plates one and two are flush with the outer surfaces of their respective panels; the outer surfaces of sealing plates one and two are smooth sealing surfaces. The corner of the L-shaped inner tube has been improved from a 90-degree straight corner to an elbow structure, thus solving the problems of material blockage, material stoppage, and material accumulation that are common with straight corners.

Description

Technical Field

[0001] This utility model relates to the field of plate heat exchanger technology, and specifically to an intermediate plate assembly on a plate heat exchanger. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger consisting of several stacked metal heat exchange plates.

[0003] On April 17, 2024, the applicant filed a patent application with the publication number CN 222670784 U, entitled "An intermediate heat exchange component for a plate heat exchanger and a plate heat exchanger".

[0004] The intermediate heat exchange component is positioned between two adjacent metal heat exchange plates, allowing fluid to enter and exit midway. (Reference) Figure 1 As shown, a middle tube 2 is provided between the two panels 1 (only one end of the middle tube 2 is open, and the other end is closed), and a tube body 2 3 is vertically connected to the middle tube 2 and communicates with it.

[0005] The above structure has the following problems: Since the intermediate pipe 2 and the pipe body 3 are vertically connected, there are vertical corners and dead angles in the middle, which can easily lead to problems such as material blockage, material stoppage, and material accumulation. Utility Model Content

[0006] In view of the problems pointed out in the background art, the present invention proposes an intermediate plate assembly for a plate heat exchanger to solve the above-mentioned technical problems.

[0007] The technical solution of this utility model is implemented as follows:

[0008] An intermediate plate assembly for a plate heat exchanger includes two spaced-apart and fixedly connected panels, with an intermediate tube positioned between the two panels. Each panel has openings corresponding to the intermediate tube.

[0009] It also includes an L-shaped inner tube, which is composed of a tube body one and a tube body two connected together, with the connection between the tube body one and the tube body two being an elbow structure.

[0010] One tube is connected inside the middle tube, and the side wall of the middle tube is provided with a through hole for the second tube to pass through;

[0011] The two ends of the middle tube are respectively provided with sealing plate one and sealing plate two, which are adapted to the opening and rotatably connected. Sealing plate one is provided with a connecting hole that connects with tube body one. Sealing plate one and sealing plate two are respectively flush with the outer side of the corresponding panel.

[0012] Both the outer surfaces of sealing plate one and sealing plate two are smooth sealing surfaces.

[0013] The present invention is further provided that the outer walls at both ends of the intermediate tube are provided with annular mounting rings, which abut against the inner side of the corresponding panel.

[0014] The present invention is further configured such that a pipe joint is formed at the end of the second pipe body.

[0015] The present invention is further configured such that a central tube is connected to each of the four corners of the panel.

[0016] The present invention is further configured such that an annular fixing frame is provided between the two panels to connect the two panels, and the middle tube is located outside the fixing frame.

[0017] The present invention is further provided with connecting grooves at the middle position of the upper side of the panel.

[0018] The present invention is further provided with a support groove at the middle position of the lower side of the panel.

[0019] The present invention is further configured such that the inner tube is welded and fixed to the intermediate tube and the sealing plate.

[0020] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0021] The intermediate plate assembly of the plate heat exchanger provided by this utility model has its L-shaped inner tube corner improved from the original 90-degree straight corner to an elbow structure, thus solving the problem of material blockage, material stoppage, and material accumulation caused by straight corners.

[0022] The rubber sealing ring on the heat exchange plate that is in close contact with the panel cooperates with the sealing surface on the sealing plate to form a seal. The sealing plate 2 cooperates with the sealing ring on the heat exchange plate to form a blockage of the fluid. The sealing plate 1 cooperates with the sealing ring on the heat exchange plate to allow the fluid to enter the inner tube. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the existing technology.

[0025] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0026] Figure 3This is a cross-sectional view of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0028] Figure 5 This is a schematic diagram of the structure of the intermediate tube and inner tube of this utility model.

[0029] The following are the labels in the attached diagram: Panel 1, Intermediate tube 2, Opening 3, Tube body 1 4, Tube body 2 5, Elbow structure 6, Through hole 7, Sealing plate 1 8, Sealing plate 2 9, Connecting hole 10, Sealing surface 11, Mounting ring 12, Pipe joint 13, Fixing frame 14, Connecting groove 15, Support groove 16. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] For reference as follows Figures 1-5 The present invention will be described as follows:

[0032] Example: An intermediate plate assembly on a plate heat exchanger includes two spaced and fixedly connected panels 1, the panels 1 are vertically arranged, and an intermediate tube 2 is provided between the two panels 1. The structural connection and preliminary construction of the fluid channel between the two panels 1 are achieved through the intermediate tube 2.

[0033] The panel 1 is provided with an opening 3 that corresponds to the intermediate tube 2 and provides a basic interface for the intermediate tube 2 to connect with the external structure.

[0034] It also includes an L-shaped inner tube, which is formed by connecting tube body 4 and tube body 5. The connection between tube body 4 and tube body 5 is an elbow structure 6. Compared with the traditional 90-degree straight corner, the elbow structure 6 makes the flow path of the fluid at the corner smoother through the arc transition. From the perspective of fluid mechanics, straight corners will form local turbulence and dead volume, causing the material velocity to drop sharply at the corner, which is prone to material blockage (flow obstruction), material stoppage (zero flow velocity), and material accumulation (material deposition). The elbow structure 6 reduces flow resistance, allowing the material to pass through the corner continuously, fundamentally solving the above problems and ensuring the stability and continuity of material transportation.

[0035] Pipe body 4 is connected inside intermediate pipe 2, forming a nested structure with intermediate pipe 2. The side wall of intermediate pipe 2 is provided with through hole 7 for pipe body 5 to pass through; so that the inner pipe can realize the diversion and transportation of fluid in a limited space, while intermediate pipe 2 plays a role in protecting and positioning pipe body 4.

[0036] The intermediate tube 2 is equipped with sealing plates 8 and 9 at both ends, which are adapted to and rotatably connected to the opening 3. This rotatable connection allows the intermediate tube 2 and tube body 5 to adjust their angles within a certain range, facilitating precise alignment with surrounding components during installation. Sealing plates 8 and 9 are flush with the outer surface of the corresponding panel 1, ensuring flatness when in contact with the heat exchange fins and providing a basic condition for sealing.

[0037] The sealing plate 8 has a connecting hole 10 that connects with the pipe body 4, which becomes the key interface for fluid to enter the inner pipe; the sealing plate 9 does not have a flow hole and mainly serves the function of sealing.

[0038] The sealing plate 8 and the sealing plate 9 are respectively flush with the outer side of the corresponding panel 1;

[0039] Both sealing plates 8 and 9 have smooth sealing surfaces 11 on their outer sides. This design mates with the rubber sealing ring on the heat exchange fins that are in close contact with the panel 1. When the heat exchange fins are in contact with the sealing plates, the rubber sealing ring will make tight contact with the sealing surface 11, using the elastic deformation of the rubber to fill the tiny gaps and form a reliable seal.

[0040] Specifically, when the sealing plate 2 9 is used in conjunction with the heat exchange plate sealing ring, since there is no flow channel, it can directly block the flow of fluid through this end of the intermediate pipe 2, thereby achieving the sealing of a specific fluid; the sealing plate 1 8 is connected to the inner pipe through the connecting hole 10. On the basis of the sealing ring, the fluid is allowed to enter the pipe body 1 4 through the connecting hole 10, and then be transported to the designated position through the pipe body 2 5, which not only ensures the sealing performance, but also realizes the directional transportation function.

[0041] By changing the inner tube bend to an elbow structure 6, the fluid dynamics characteristics are directly optimized, reducing the risk of material retention during the conveying process. It is especially suitable for handling high-viscosity, particulate, or easily deposited materials, improving the equipment's operational stability and ease of maintenance.

[0042] The flush design of the sealing plate and the panel, as well as the use of the smooth sealing surface 11, ensures effective cooperation with the heat exchange plate sealing ring. While achieving the sealing function, the differentiated design of sealing plate 1 8 and sealing plate 2 9 (with or without connecting holes) respectively meets the requirements for fluid inflow and blockage, enabling the intermediate plate assembly to accurately control the fluid flow according to the requirements of the heat exchange process, thereby improving the overall operating efficiency of the plate heat exchanger.

[0043] Annular mounting rings 12 are provided on the outer walls of both ends of the intermediate tube 2, and the mounting rings 12 abut against the inner surfaces of the corresponding panels 1. This forms an axial positioning structure between the intermediate tube 2 and the panels 1. Based on the rotatable connection between the intermediate tube 2 and the openings 3 on the panels 1 via sealing plates 8 and 9, the mounting rings 12, by abutting against the inner surfaces of the panels 1, restrict the axial displacement of the intermediate tube 2 towards the inner side of the panels 1, preventing relative positional misalignment between the intermediate tube 2 and the panels 1 due to fluid pressure or assembly errors, further improving the stability of the connection between the intermediate tube 2 and the panels 1. Simultaneously, the annular structure of the mounting rings 12 can evenly distribute the force exerted by the intermediate tube 2 on the panels 1, reducing the risk of deformation caused by excessive local stress on the panels 1.

[0044] Pipe joint 13 is formed at the end of pipe body 2 5. It provides a standardized interface for connecting the inner pipe to the external pipeline. The structure of pipe joint 13 can be adapted to the actual pressure and flow rate of the fluid being transported and the pipeline connection method (such as threaded connection, flange connection, etc.) to ensure that the fluid transported by the inner pipe can be stably connected to the subsequent processing system or equipment through pipe joint 13.

[0045] The four corners of panel 1 are connected to intermediate tubes 2. This distribution creates a symmetrical rectangular layout of the four intermediate tubes 2 on panel 1. The symmetrical distribution of the intermediate tubes 2 makes the force between the two panels 1 more even, avoiding deformation of panel 1 caused by localized force concentration.

[0046] An annular fixing frame 14 is provided between the two panels 1 to connect them. The annular structure of the fixing frame 14 can form a uniform support force between the two panels 1, ensuring the parallelism and spacing stability of the panels 1.

[0047] The intermediate tube 2 is located outside the fixed frame 14. This creates a spatial partitioning between the intermediate tube 2 and the fixed frame 14, avoiding structural interference between them.

[0048] A connecting groove 15 is provided at the middle position of the upper side of panel 1. A support groove 16 is provided at the middle position of the lower side of panel 1.

[0049] The connecting groove 15 and the support groove 16 are respectively connected to the upper and lower mounting rods on the plate heat exchanger, forming a positioning and fixing structure for the intermediate plate assembly within the overall heat exchanger structure. The connecting groove 15, in conjunction with the upper mounting rod, suspends or fixes the intermediate plate assembly from the top, limiting its horizontal displacement. The support groove 16, in conjunction with the lower mounting rod, bears the weight of the intermediate plate assembly, providing vertical support. Together, they ensure the intermediate plate assembly is stably installed in its designated position on the heat exchanger, preventing positional shift during equipment operation.

[0050] The inner tube is welded and fixed to the intermediate tube 2 and the sealing plate 8. This connection method ensures the structural integrity and sealing of the three components. Welding eliminates gaps between the inner tube and the intermediate tube 2, and between the inner tube and the sealing plate 8, preventing fluid leakage at the connection points.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intermediate plate assembly for a plate heat exchanger, comprising two spaced-apart and fixedly connected panels, with an intermediate tube disposed between the two panels, and openings on the panels corresponding to and connected to the intermediate tube, characterized in that: It also includes an L-shaped inner tube, which is composed of a tube body one and a tube body two connected together, with the connection between the tube body one and the tube body two being an elbow structure. One tube is connected inside the middle tube, and the side wall of the middle tube is provided with a through hole for the second tube to pass through; The two ends of the middle tube are respectively provided with sealing plate one and sealing plate two, which are adapted to the opening and rotatably connected. Sealing plate one is provided with a connecting hole that connects with tube body one. Sealing plate one and sealing plate two are respectively flush with the outer side of the corresponding panel. Both the outer surfaces of sealing plate one and sealing plate two are smooth sealing surfaces.

2. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that The outer walls at both ends of the intermediate tube are provided with annular mounting rings, which abut against the inner side of the corresponding panel.

3. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: The end of the second tube is formed into a pipe joint.

4. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: The panel has a central tube connected to each of its four corners.

5. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: An annular fixing frame is provided between the two panels to connect them, and the middle tube is located outside the fixing frame.

6. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: The panel has a connecting groove at the middle position on the upper side.

7. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: The panel has a support groove at the middle position on the lower side.

8. An intermediate plate assembly for a plate heat exchanger according to claim 1, characterized in that: The inner tube is welded and fixed to the intermediate tube and the sealing plate.

Images