Sealing gasket of plate heat exchanger

Abstract

The utility model relates to a plate heat exchanger sealing gasket which comprises a gasket body, hanging claws and a fixing connecting piece, the gasket body comprises a first sealing straight edge area, a first sealing corner hole area and a second sealing area, and the hanging claws are arranged on the outer side of the first sealing straight edge area and the outer side of the first sealing corner hole area. A plurality of fixed connecting pieces are arranged on the inner side of the first sealing straight-edge area and the inner side of the second sealing straight-edge area, each fixed connecting piece comprises a fixed rib and a connecting rib, one ends of the two fixed ribs are fixedly connected with the gasket body, the other ends of the two fixed ribs are connected through the connecting rib, and a positioning hole is formed between the two fixed ribs and the connecting rib. The sealing gasket with the novel structure is applied to the plate heat exchanger, so that the sealing gasket can be firmly and accurately embedded in a sealing groove of a plate. And the sealing gasket can be better fixed in the plate sheet sealing groove through the fixed connecting piece, and medium leakage caused by falling off is prevented.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment, specifically a sealing gasket that can be applied to detachable plate heat exchangers and other similar plate heat exchangers. Background Technology

[0002] A plate heat exchanger consists of a set of corrugated metal plates with holes for the two liquids to pass through. The metal plates are installed in a frame with fixed and movable clamping plates on one side and are clamped with bolts. Rubber gaskets are installed on the plates to seal the fluid passages and guide the cold and hot fluids to flow alternately into their respective channels. The flow rate, physical properties, pressure drop, and temperature difference of the fluids determine the number and size of the plates. The corrugated plates not only intensify the turbulence but also form many support points, which are sufficient to withstand the pressure difference between the media. Rectangular channels are formed between the plates, and heat exchange occurs through the plates. It is an ideal device for liquid-liquid and liquid-vapor heat exchange.

[0003] In existing technologies, gaskets are placed within the sealing grooves of the plate heat exchanger to prevent leakage of the internal medium and to isolate two media, preventing their mixing and ensuring normal equipment operation. The gaskets consist of a primary sealing straight-edge area, a primary sealing corner hole area, and a secondary sealing area. Currently, the gaskets are secured to the plate using snaps or claws on their outer sides to achieve a seal. The operating pressure of these gaskets generally does not exceed 3.2 MPa. When the plate heat exchanger operates under high pressure, at the sealing points of the gaskets, such as the primary sealing straight-edge area and the secondary sealing area, the high operating pressure of the fluid causes the gaskets to be strongly impacted by the high-pressure fluid. This can cause the gaskets to partially deviate from the sealing groove, resulting in breakage and seal failure. The fluids from both sides can mix or leak to the outside of the heat exchanger, severely affecting the performance of the plate heat exchanger and even causing it to completely lose its heat exchange function. Therefore, it is necessary to add connection structures to the plate in the primary sealing straight-edge area and the secondary sealing area to ensure the sealing performance of the gaskets. Utility Model Content

[0004] The purpose of this invention is to provide a sealing gasket for a plate heat exchanger, which is firmly and accurately positioned to prevent it from falling off and has good sealing performance.

[0005] The technical solution of this utility model:

[0006] A sealing gasket for a plate heat exchanger includes a gasket body, hanging claws, and fixing connectors. The gasket body includes a first sealing straight edge area, a first sealing corner hole area, and a second sealing area. Multiple hanging claws are installed on the outer sides of the first sealing straight edge area and the first sealing corner hole area. Multiple fixing connectors are provided on the inner sides of the first sealing straight edge area and the second sealing area. Each fixing connector includes a fixing rib and a connecting rib. One end of two fixing ribs is fixedly connected to the gasket body, and the other end is connected through a connecting rib. A positioning hole is formed between the two fixing ribs and the connecting rib.

[0007] The technical solution of this application:

[0008] 1. The sealing gasket of this novel structure is applied to plate heat exchangers, enabling the sealing gasket to be firmly and accurately embedded in the sealing groove of the plate. The fixing connector can better fix the sealing gasket in the sealing groove of the plate, preventing it from falling off and causing medium leakage, and has strong pressure resistance.

[0009] 2. The fixing connector of the sealing gasket in this application has two fixing ribs with positioning function. The connection strength between the fixing connector and the gasket body is high, which improves the positioning accuracy and connection strength of the gasket at the sealing part of the gasket. This ensures that the performance of the sealing gasket of the plate heat exchanger is normal, meets the requirement of multiple uses of the gasket in the maintenance of the plate heat exchanger, and reduces the use and maintenance costs of the plate heat exchanger. Attached Figure Description

[0010] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the existing plate heat exchanger sealing gasket structure.

[0012] Figure 2 This is a schematic diagram of the structure of the sealing gasket for the plate heat exchanger in this application.

[0013] Figure 3 yes Figure 2 Enlarged structural diagram of the fixed connector at point I.

[0014] Figure 4 yes Figure 3 AA sectional view.

[0015] Figure label:

[0016] Gasket body 1; hanging claw 2; fixed connector 3; first sealing straight edge area 11; first sealing corner hole area 12; second sealing area 13; fixing rib 31; connecting rib 32; positioning hole 33. Detailed Implementation

[0017] The purpose of this invention is to solve the problems existing in the sealing gaskets of plate heat exchangers mentioned above, and to provide a sealing gasket with a firm and accurate positioning structure at the sealing point, which can ensure the performance of the plate heat exchanger and stabilize the sealing ability of the sealing gasket.

[0018] In the following detailed description, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] 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.

[0020] A sealing gasket for a plate heat exchanger includes a gasket body 1, hanging claws 2, and fixing connectors 3. The gasket body 1 includes a first sealing straight edge area 11, a first sealing corner hole area 12, and a second sealing area 13. Multiple hanging claws 3 are mounted on the outer sides of the first sealing straight edge area 11 and the first sealing corner hole area 12. Multiple fixing connectors 3 are provided on the inner sides of the first sealing straight edge area 11 and the second sealing area 13. Each fixing connector 3 includes two fixing ribs 31 and one connecting rib 32. One end of each fixing rib 31 is fixedly connected to the gasket body 1, and the other end is connected via the connecting rib 32. A positioning hole 33 is formed between the two fixing ribs 31 and the connecting rib 32. The fixing connectors hang on protrusions on the plate, serving to strengthen positioning and prevent detachment. This application's sealing gasket has hanging claws on the outer side and fixing connectors on the inner side (first and second sealing areas), thus fixing both the inner and outer sides of the sealing gasket to the plate, increasing its stability. Unlike snap fasteners, fixed connectors do not require drilling holes in the plate, eliminating the risk of leakage. They also have a simple structure and are easy to attach to protrusions on the plate.

[0021] The positioning hole can be of any shape, but in practice, it is best to have a U-shape, a rectangle, or a circle. This shape and structure is simple, the manufacturing process is simple, and it is convenient to use.

[0022] The gasket body has a hexagonal cross-section; the fixing connector has a trapezoidal or rectangular cross-section, which better matches the recess of the plate.

[0023] To ensure a more secure fixation, multiple fixing connectors 3 are also installed on the side of the sealing corner hole area facing the inside of the gasket body.

[0024] Common materials used for the sealing gaskets described in this application include EPDM rubber, nitrile rubber, fluororubber, and neoprene rubber gaskets.

[0025] The fixing connectors of this application are installed on the side of the gasket facing inwards from the first sealing straight edge area, the second sealing area, and the first sealing corner hole area, mainly for reinforcement. Combined with snaps or claws installed on the outside of existing gaskets, fixing connectors are installed on both the outside and inside of the gasket, which better secures the gasket within the gasket groove of the plate, preventing media leakage.

[0026] The sealing gasket of this application has a firm and accurate sealing structure, which can ensure the performance of the plate heat exchanger and stabilize the sealing capacity of the gasket. It solves the problem that the gasket of the removable plate heat exchanger is easily damaged under high temperature and high pressure operation, which leads to the shutdown of the plate heat exchanger, and reduces the maintenance cost of the plate heat exchanger.

[0027] Note: In this article, "inner side" refers to the side facing the center of the gasket, and "outer side" refers to the side facing the outer periphery of the gasket.

[0028] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sealing gasket for a plate heat exchanger, characterized in that: The sealing gasket includes a gasket body, hanging claws, and fixing connectors. The gasket body includes a first sealing straight edge area, a first sealing corner hole area, and a second sealing area. Multiple hanging claws are installed on the outer side of the first sealing straight edge area and the first sealing corner hole area. Multiple fixing connectors are provided on the inner side of the first sealing straight edge area and the inner side of the second sealing area. The fixing connectors include fixing ribs and connecting ribs. One end of two fixing ribs is fixedly connected to the gasket body, and the other end is connected through the connecting rib. A positioning hole is formed between the two fixing ribs and the connecting rib.

2. The plate heat exchanger sealing gasket according to claim 1, characterized in that: The positioning hole is U-shaped, rectangular, or circular.

3. The plate heat exchanger sealing gasket according to claim 2, characterized in that: The gasket body has a hexagonal cross-section; the fixed connector has a trapezoidal or rectangular cross-section.

4. The plate heat exchanger sealing gasket according to claim 1, characterized in that: The sealing corner hole area facing the inside of the gasket body is also equipped with multiple fixing connectors.

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