Supporting, guiding and leakage-proof structure of U-shaped bend of U-shaped tube type flow-through heat exchanger

Abstract

The utility model relates to a kind of U-shaped pipe type flow-through heat exchanger U-shaped bend's support flow guide leak-proof structure, including flow guide support plate, U-shaped flow guide leak-proof plate, support sealing plate, warehouse body and sealing soft pad, the U-shaped flow guide leak-proof plate is fixedly connected in the side of flow guide support plate, the side of U-shaped flow guide leak-proof plate away from flow guide support plate is through support sealing plate and extends to the inside of warehouse body, the sealing soft pad is fixedly connected in the inside of warehouse body, the sealing soft pad is attached with U-shaped flow guide leak-proof plate, sliding mechanism is provided on the flow guide support plate, the outside fixed mounting of support sealing plate has positioning plate, when flow guide support plate moves, flow guide support plate and sliding mechanism relatively slide, reduce the friction between the U-shaped tube bundle of U-shaped pipe type flow-through heat exchanger and flow guide support plate, not prone to crack or fracture due to long time friction, prolongs service life.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a support, flow guiding and leak-proof structure for a U-shaped bend in a U-shaped tube cross-flow heat exchanger. Background Technology

[0002] As the main heat transfer device in low-pressure-drop gas heat exchangers, cross-flow heat exchangers suffer from problems such as shell-side fluid deviation, short-circuiting, and low heat transfer efficiency. Currently, cross-flow heat exchangers are mainly divided into fixed tube sheet heat exchangers, floating head heat exchangers, and U-tube heat exchangers. In cross-flow fixed tube sheet heat exchangers and floating head heat exchangers, the heat exchange tubes are straight tubes. When the shell-side structure is reasonably set, the problems of shell-side fluid deviation, short-circuiting, and low heat transfer efficiency are not serious. However, when using a U-tube cross-flow heat exchanger structure, due to the presence of the U-shaped bend section, the gap between the U-shaped bend and the shell head is large, and the shell-side fluid is prone to leakage and short-circuiting.

[0003] A search revealed a Chinese Utility Model Publication No. CN115200390A, which discloses a support, flow guiding, and leak-proof structure for the U-bend of a U-tube cross-flow heat exchanger. The specific implementation describes that "the lower guide port 17 facilitates the inflow of shell-side fluid into the U-bend section, allowing it to participate in heat transfer. The upper guide port 14 facilitates the outflow of fluid from the U-bend section. The sealing elastic gasket 13 uses soft fillers such as asbestos or pearl cotton to form a flexible and expandable sealing structure, allowing the U-shaped flow guiding leak-proof plate 11 to freely expand and contract within the U-shaped groove, thereby enabling the U-tube bundle to freely expand and contract within the shell and preventing leakage of the shell-side fluid."

[0004] In this U-shaped tube heat exchanger, the U-shaped bend support and flow guiding structure has a problem: when the U-shaped flow guiding and leak-proof plate expands and contracts inside the U-shaped groove, the flow guiding support plate slides outside the U-shaped tube bundle. This may cause wear on the surface of the U-shaped tube bundle and the U-shaped flow guiding and leak-proof plate due to friction. After a long period of friction, cracks or breaks may occur, affecting the service life. Therefore, a U-shaped tube heat exchanger U-shaped bend support and flow guiding structure is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a support, flow guiding, and leak-proof structure for the U-shaped bend of a U-shaped tube heat exchanger. It has advantages such as long service life and solves the problem that wear on the surface of the U-shaped tube bundle and the U-shaped flow guiding and leak-proof plate caused by friction may lead to cracks or breakage after long-term friction, thus affecting the service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a support and anti-leakage structure for the U-shaped bend of a U-tube cross-flow heat exchanger, comprising a flow guide support plate, a U-shaped flow guide anti-leakage plate, a support sealing plate, a chamber body, and a sealing gasket. The U-shaped flow guide anti-leakage plate is fixedly connected to one side of the flow guide support plate. The side of the U-shaped flow guide anti-leakage plate away from the flow guide support plate penetrates the support sealing plate and extends into the interior of the chamber body. The sealing gasket is fixedly connected to the interior of the chamber body and fits against the U-shaped flow guide anti-leakage plate. A sliding mechanism is provided on the flow guide support plate, and a positioning plate is fixedly installed on the outside of the support sealing plate. The sliding mechanism includes a tube body, and the inside of the flow guide support plate is provided with a through hole. The tube body is located inside the through hole. A slider extending into the inside of the flow guide support plate is fixedly installed on the outside of the tube body. Two first buffer pads are fixedly installed on the outside of the tube body, and second buffer pads are fixedly installed on both sides of the flow guide support plate.

[0007] Furthermore, a first flow guide port is provided at the top of the flow guide support plate, and a second flow guide port is provided at the bottom of the flow guide support plate.

[0008] Furthermore, the flow guide support plate has flow guide holes inside and a sliding groove at the bottom.

[0009] Furthermore, the flow guide support plate has a first groove inside, and the first buffer pad has a second groove inside, both of which are matched with the slider.

[0010] Furthermore, a ball bearing is fixedly installed inside the first groove, and the ball bearing is in contact with the slider.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects: The U-shaped bend support and anti-leakage structure of this U-tube cross-flow heat exchanger consists of a flow guide support plate, a U-shaped flow guide anti-leakage plate, a support sealing plate, a chamber, a sealing gasket, a sliding mechanism, and a positioning plate. When the flow guide support plate moves, it drives the U-shaped flow guide anti-leakage plate and the sealing gasket to move inside the chamber. The support sealing plate, chamber, and sealing gasket remain sealed. The flow guide support plate slides relative to the sliding mechanism, reducing friction between the U-shaped tube bundle and the flow guide support plate. This prevents cracks or breaks caused by prolonged friction, thus extending the service life. Attached Figure Description

[0012] Figure 1 This is the left view of the present invention; Figure 2 This is a right view of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the connection between the tube body and the slider of this utility model.

[0013] In the figure: 1. Flow guide support plate, 2. U-shaped flow guide leak prevention plate, 3. Support sealing plate, 4. Chamber body, 5. Sealing pad, 6. Sliding mechanism, 61. Pipe body, 62. Slider, 63. First buffer pad, 64. Second buffer pad, 7. Positioning plate. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4 This embodiment of a U-shaped tube cross-flow heat exchanger includes a U-shaped flow guide and leak-proof structure for the U-shaped bend, comprising a flow guide support plate 1, a U-shaped flow guide leak-proof plate 2, a support sealing plate 3, a chamber 4, and a sealing gasket 5. The U-shaped flow guide leak-proof plate 2 is fixedly connected to one side of the flow guide support plate 1. The side of the U-shaped flow guide leak-proof plate 2 away from the flow guide support plate 1 passes through the support sealing plate 3 and extends into the interior of the chamber 4. The sealing gasket 5 is fixedly connected to the interior of the chamber 4 and fits against the U-shaped flow guide leak-proof plate 2. The sealing gasket 5 is made of silicone. A sliding mechanism 6 is provided on the flow guide support plate 1, and a positioning plate 7 is fixedly installed on the outside of the support sealing plate 3.

[0016] Specifically, when the flow guide support plate 1 moves, it drives the U-shaped flow guide leak-proof plate 2 and the sealing gasket 5 to move inside the chamber 4. The support sealing plate 3, the chamber 4 and the sealing gasket 5 remain in a sealed state. The flow guide support plate 1 slides relative to the sliding mechanism 6, which reduces the friction between the U-shaped tube bundle of the U-tube heat exchanger and the flow guide support plate 1. This makes it less likely for cracks or breaks to occur due to long-term friction, thus extending the service life.

[0017] In this embodiment, the top of the flow guide support plate 1 is provided with a first flow guide port, the bottom of the flow guide support plate 1 is provided with a second flow guide port, the interior of the flow guide support plate 1 is provided with a flow guide hole, and the bottom of the flow guide support plate 1 is provided with a sliding groove.

[0018] Specifically, the support and leakage prevention structure of this application is installed in the U-shaped tube bundle bend section of the U-tube heat exchanger. The flow-guiding support plate 1 serves as the support plate for the U-shaped tube bundle, and the U-shaped flow-guiding leakage prevention plate 2 cooperates with the U-shaped tube bundle to guide the shell-side fluid into the U-shaped tube bundle bend section while preventing leakage of the shell-side fluid along the gap between the heat exchanger shell and the U-shaped tube bundle. The shell-side fluid flows in from the shell-side inlet and is evenly distributed along the axial direction of the U-shaped tube bundle. When it reaches the rear section of the U-shaped tube bundle, it flows into the U-shaped tube bundle bend section along the second flow-guiding port and flow-guiding hole of the flow-guiding support plate 1. Under the combined action of the U-shaped flow-guiding leakage prevention plate 2, the support sealing plate 3, the chamber 4, and the sealing gasket 5, the U-shaped tube bundle bend section participates in heat exchange. In the U-shaped tube bundle bend section, the shell-side fluid that has participated in heat transfer is collected at the shell-side outlet through the first flow-guiding port of the flow-guiding support plate and flows out of the heat exchanger.

[0019] In this embodiment, the sliding mechanism 6 includes a tube 61, a through hole is provided inside the flow guide support plate 1, the tube 61 is located inside the through hole, and a slider 62 extending into the flow guide support plate 1 is fixedly installed on the outside of the tube 61. A first groove is provided inside the flow guide support plate 1, and a second groove is provided inside the first buffer pad 63. Both the first and second grooves are matched with the slider 62. A ball is fixedly installed inside the first groove, and the ball contacts the slider 62. Two first buffer pads 63 are fixedly installed on the outside of the tube 61, and second buffer pads 64 are fixedly installed on both sides of the flow guide support plate 1. The material of the first buffer pad 63 and the material of the second buffer pad 64 are both rubber.

[0020] Specifically, the flow guide support plate 1 slides outside the slider 62, and the flow guide support plate 1 slides relative to the tube body 61. The first buffer pad 63 and the second buffer pad 64 come into contact to offset the impact force.

[0021] The working principle of the above embodiments is as follows: The flow-guiding and leak-proof structure of this application is installed in the U-shaped tube bundle bend section of the U-tube heat exchanger. The straight tube section of the U-shaped tube bundle is fixedly connected inside the tube body 61. The flow-guiding support plate 1 serves as the support plate for the U-shaped tube bundle. The U-shaped flow-guiding and leak-proof plate 2 cooperates with the U-shaped tube bundle to guide the shell-side fluid into the U-shaped tube bundle bend section and prevent the shell-side fluid from leaking along the gap between the heat exchanger shell and the U-shaped tube bundle. The shell-side fluid flows in from the shell-side inlet and is evenly distributed along the axial direction of the U-shaped tube bundle. When it reaches the rear section of the U-shaped tube bundle, it flows into the U-shaped tube bundle bend section along the second flow-guiding port and flow-guiding hole of the flow-guiding support plate 1. Under the combined action of the U-shaped flow-guiding and leak-proof plate 2, the support sealing plate 3, the chamber body 4, and the sealing gasket 5, the U-shaped tube bundle bend section participates in the heat exchange. In the U-shaped tube bundle bend section, the shell-side fluid, after participating in heat transfer, is collected at the shell-side outlet through the first guide port of the guide support plate and flows out of the heat exchanger. When the guide support plate 1 moves, it drives the U-shaped guide leak-proof plate 2 and the sealing gasket 5 to move inside the chamber 4. The support sealing plate 3, chamber 4 and sealing gasket 5 remain sealed. The guide support plate 1 slides outside the slider 62 and slides relative to the tube body 61. The first buffer pad 63 and the second buffer pad 64 contact each other to offset the impact force, reducing the friction between the U-shaped tube bundle and the guide support plate 1 of the U-shaped tube heat exchanger. This makes it less likely for cracks or breaks to occur due to long-term friction, thus extending the service life.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support and leakage prevention structure for the U-shaped bend of a U-tube cross-flow heat exchanger, comprising a flow-guiding support plate (1), a U-shaped flow-guiding leakage prevention plate (2), a support sealing plate (3), a chamber body (4), and a sealing gasket (5), characterized in that: The U-shaped flow guide leak-proof plate (2) is fixedly connected to one side of the flow guide support plate (1). The side of the U-shaped flow guide leak-proof plate (2) away from the flow guide support plate (1) passes through the support sealing plate (3) and extends into the interior of the chamber (4). The sealing pad (5) is fixedly connected to the interior of the chamber (4). The sealing pad (5) is in contact with the U-shaped flow guide leak-proof plate (2). A sliding mechanism (6) is provided on the flow guide support plate (1). A positioning plate (7) is fixedly installed on the outside of the support sealing plate (3). The sliding mechanism (6) includes a tube (61), and the inside of the flow guide support plate (1) is provided with a through hole. The tube (61) is located inside the through hole. A slider (62) extending into the inside of the flow guide support plate (1) is fixedly installed on the outside of the tube (61). Two first buffer pads (63) are fixedly installed on the outside of the tube (61). Second buffer pads (64) are fixedly installed on both sides of the flow guide support plate (1).

2. The support, flow guiding, and leak-proof structure for the U-shaped bend of a U-tube cross-flow heat exchanger as described in claim 1, characterized in that: The top of the flow guide support plate (1) is provided with a first flow guide port, and the bottom of the flow guide support plate (1) is provided with a second flow guide port.

3. The support, flow guiding, and leak-proof structure for the U-shaped bend of a U-shaped tube cross-flow heat exchanger as described in claim 1, characterized in that: The flow guide support plate (1) has flow guide holes inside and a sliding groove at the bottom.

4. The support, flow guiding, and leak-proof structure for the U-shaped bend of a U-tube cross-flow heat exchanger as described in claim 1, characterized in that: The flow guide support plate (1) has a first groove inside, and the first buffer pad (63) has a second groove inside. Both the first groove and the second groove are matched with the slider (62).

5. The support, flow guiding, and leak-proof structure for the U-shaped bend of a U-shaped tube cross-flow heat exchanger as described in claim 4, characterized in that: A ball bearing is fixedly installed inside the first groove, and the ball bearing is in contact with the slider (62).

Images