Tetrafluoroethylene heat exchanger with good sealing performance

Abstract

The utility model discloses a tetrafluoroethylene heat exchanger with good sealing performance, which comprises a heat exchanger shell, a joint and a tube plate, the joint and the tube plate are connected to the outer side of the heat exchanger shell, and one end, opposite to the heat exchanger shell, of the joint is connected with an external tube through a flange plate. A first sealing assembly and a second sealing assembly are arranged at the joint of the connector and the external pipe and located inside and outside the flange plate respectively. The first sealing assembly comprises two first sealing washers embedded in the flange plate, and the tube plate is attached between the two first sealing washers; the second sealing assembly comprises a first circular ring plate, a second circular ring plate and a second sealing gasket arranged between the first circular ring plate and the second circular ring plate, and the first circular ring plate and the second circular ring plate are fixedly connected with the corresponding flange plates respectively. By means of the structure, double sealing of the connecting position of the connector and the external pipe is achieved through the first sealing washer and the second sealing washer, the sealing effect is better, leakage of media can be effectively prevented, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a tetrafluoroethylene heat exchanger with good sealing performance. Background Technique

[0002] A heat exchanger is an indispensable device for realizing heat exchange and transfer in the chemical production process. In heat exchange, there are often some materials with strong corrosiveness and oxidizing properties. Therefore, the materials used to manufacture heat exchangers are required to have strong anti-corrosion performance. The polytetrafluoroethylene heat exchanger is abbreviated as the tetrafluoro heat exchanger. It is a heat exchanger with small-diameter polytetrafluoroethylene hoses as heat transfer components, also known as a flexible tube heat exchanger. The tetrafluoro heat exchanger is mainly used for heat exchange of various strongly corrosive media, such as sulfuric acid, strongly corrosive chloride solutions, acetic acid, and caustic media for cooling or heating.

[0003] At present, when connecting the joint of the tetrafluoroethylene heat exchanger with the external pipe, usually only one sealing gasket or sealing strip is used for sealing. Due to the complex working environment of the tetrafluoroethylene heat exchanger, it often faces challenges such as high temperature, high pressure, or corrosive media. One sealing gasket or sealing strip may not be able to fully adapt to these harsh conditions. After long-term use, the sealing gasket or sealing strip may age, deform, or be damaged, resulting in a decline in sealing performance and thus leakage. Therefore, those skilled in the art provide a tetrafluoroethylene heat exchanger with good sealing performance to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a tetrafluoroethylene heat exchanger with good sealing performance, which realizes double sealing at the connection between the joint and the external pipe through the provided first sealing gasket and second sealing gasket, has a better sealing effect, can effectively prevent the leakage of the medium, and has strong practicability.

[0005] To achieve the above purpose, a tetrafluoroethylene heat exchanger with good sealing performance is provided, which includes a heat exchanger shell, a joint and a tube sheet connected to the outside of the heat exchanger shell. One end of the joint opposite to the heat exchanger shell is connected with an external pipe through a flange. A first sealing component and a second sealing component are respectively arranged inside and outside the flange at the connection between the joint and the external pipe;

[0006] The first sealing component includes two first sealing gaskets embedded inside the flange, and the tube sheet is attached between the two first sealing gaskets;

[0007] The second sealing component includes a first circular ring plate, a second circular ring plate, and a second sealing gasket arranged between the first circular ring plate and the second circular ring plate. The first circular ring plate and the second circular ring plate are respectively fixedly connected to the corresponding flange.

[0008] According to the described tetrafluoroethylene heat exchanger with good sealing performance, the second sealing assembly further includes a fitting groove opened inside the second circular ring plate and a fitting portion fixedly connected to the bottom of the second sealing washer, and both the fitting groove and the fitting portion are provided with trapezoidal structures.

[0009] According to the described tetrafluoroethylene heat exchanger with good sealing performance, the first sealing assembly further includes two mounting grooves opened inside the corresponding flange plates, and both the first sealing washers are connected in cooperation with the corresponding mounting grooves.

[0010] According to the described tetrafluoroethylene heat exchanger with good sealing performance, both the two first sealing washers and the second sealing washer are tetrafluoro sealing rings.

[0011] According to the described tetrafluoroethylene heat exchanger with good sealing performance, the second sealing washer is integrally formed with the fitting portion.

[0012] According to the described tetrafluoroethylene heat exchanger with good sealing performance, the connection between the second sealing washer and the flange plate is flush.

[0013] The present utility model has the following beneficial effects:

[0014] 1. Compared with the prior art, for the described tetrafluoroethylene heat exchanger with good sealing performance, the double sealing of the connection between the joint and the outer pipe is realized through the arranged first sealing washer and the second sealing washer, and the sealing effect is better, which can effectively prevent the leakage of the medium and has strong practicability.

[0015] 2. Compared with the prior art, for the described tetrafluoroethylene heat exchanger with good sealing performance, when the second sealing washer is clamped between the first circular ring plate and the second circular ring plate, the trapezoidal fitting portion is inserted in cooperation with the fitting groove, which can well increase the contact area between the second sealing washer and the connection, thereby well improving the sealing effect of the connection between the joint and the outer pipe.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0018] Figure 1 It is a schematic diagram of the overall structure of a tetrafluoroethylene heat exchanger with good sealing performance of the present utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the joint, outer pipe and flange plate of a tetrafluoroethylene heat exchanger with good sealing performance of the present utility model;

[0020] Figure 3Schematic diagram of the internal sectional structure of the joint, external connecting pipe and flange of a tetrafluoroethylene heat exchanger with good sealing performance of the present utility model;

[0021] Figure 4 A tetrafluoroethylene heat exchanger with good sealing performance of the present utility model Figure 3 Enlarged structural diagram at position A in it.

[0022] Legend:

[0023] 1. Heat exchanger shell; 2. Joint; 3. External connecting pipe; 4. Flange; 5. Installation groove; 6. Tube sheet; 7. First sealing washer; 8. First circular ring plate; 9. Second circular ring plate; 10. Fitting groove; 11. Second sealing washer; 12. Fitting part. Specific implementation mode

[0024] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation to the protection scope of the present utility model.

[0025] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment of a tetrafluoroethylene heat exchanger with good sealing performance of the present utility model includes a heat exchanger shell 1, a joint 2 and a tube sheet 6 connected to the outside of the heat exchanger shell 1. One end of the joint 2 opposite to the heat exchanger shell 1 is connected with an external connecting pipe 3 through a flange 4. A first sealing component and a second sealing component are respectively arranged inside and outside the flange 4 at the connection of the joint 2 and the external connecting pipe 3; the first sealing component includes two first sealing washers 7 embedded inside the flange 4, and the tube sheet 6 is attached between the two first sealing washers 7; the second sealing component includes a first circular ring plate 8, a second circular ring plate 9 and a second sealing washer 11 arranged between the first circular ring plate 8 and the second circular ring plate 9. The first circular ring plate 8 and the second circular ring plate 9 are respectively fixedly connected to the corresponding flange 4;

[0026] The two first sealing washers 7 are respectively installed inside the flange 4. The tube sheet 6 is placed on the top of the lower first sealing washer 7. By fixing the flange 4 with bolts, the two first sealing washers 7 can be made to fit on the outside of the tube sheet 6 to seal the tube sheet 6. When the flange 4 is fixed, the second sealing washer 11 is clamped between the first circular ring plate 8 and the second circular ring plate 9. Thus, under the action of the second sealing washer 11, the connection of the flange 4 can be further sealed. The first sealing washer 7 and the second sealing washer 11 provided achieve double sealing at the connection of the joint 2 and the external connecting pipe 3, with better sealing effect, which can effectively prevent the leakage of the medium and has strong practicability.

[0027] The second sealing assembly further includes a fitting groove 10 formed inside the second circular ring plate 9 and a fitting portion 12 fixedly connected to the bottom of the second sealing washer 11. Both the fitting groove 10 and the fitting portion 12 are trapezoidal structures. When the second sealing washer 11 is clamped between the first circular ring plate 8 and the second circular ring plate 9, the trapezoidal fitting portion 12 is inserted into the fitting groove 10 in a matching manner, which can well increase the contact area between the second sealing washer 11 and the connection part, thereby improving the sealing effect of the connection part of the flange 4.

[0028] The first sealing assembly further includes two mounting grooves 5 formed inside the corresponding flanges 4. Both of the two first sealing washers 7 are connected to the corresponding mounting grooves 5 in a matching manner. The mounting grooves 5 are used to mount the first sealing washers 7, which can well position the first sealing washers 7 and at the same time enable the first sealing washers 7 to better fit on the surface of the tube sheet 6, thereby enhancing the sealing effect and preventing the leakage of the medium.

[0029] Both of the two first sealing washers 7 and the second sealing washer 11 are tetrafluoroethylene sealing rings. The first sealing washer 7 and the second sealing washer 11 made of polytetrafluoroethylene have good characteristics such as high temperature resistance, corrosion resistance and anti-aging, so as to ensure the service life of the first sealing washer 7 and the second sealing washer 11 and good sealing effect.

[0030] The second sealing washer 11 and the fitting portion 12 are integrally formed. The integrally structured second sealing washer 11 and fitting portion 12 are convenient to manufacture, and the overall structure can reduce the connection part to reduce the risk of leakage.

[0031] The connection part of the second sealing washer 11 is flush with the flange 4. The second sealing washer 11 is installed at the connection part of the two flanges 4, which can ensure the sealing effect of the connection part.

[0032] Working principle: The two first sealing washers 7 are respectively installed inside the flanges 4. The tube sheet 6 is placed on the top of the lower first sealing washer 7. By fixing the flanges 4 with bolts, the two first sealing washers 7 can be made to fit on the outside of the tube sheet 6 to seal the tube sheet 6. When the flanges 4 are fixed, the second sealing washer 11 is clamped between the first circular ring plate 8 and the second circular ring plate 9. Thus, under the action of the second sealing washer 11, the connection part of the flanges 4 can be further sealed. The provided first sealing washer 7 and second sealing washer 11 achieve double sealing of the connection part between the joint 2 and the outer connecting pipe 3, with better sealing effect, effectively preventing the leakage of the medium and having strong practicability.

[0033] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can also be made without departing from the gist of the present invention.

Claims

1. A tetrafluoroethylene heat exchanger with good sealing performance, comprising a heat exchanger shell (1), a joint (2) connected to the outside of the heat exchanger shell (1), and a tube sheet (6), characterized in that: The end of the joint (2) opposite to the heat exchanger housing (1) is connected to an external pipe (3) via a flange (4); a first sealing component and a second sealing component are respectively provided at the connection between the joint (2) and the external pipe (3) and inside and outside the flange (4); The first sealing assembly comprises two first sealing gaskets (7) embedded in the flange (4), and the tube sheet (6) is fitted between the two first sealing gaskets (7); The second sealing assembly comprises a first annular plate (8), a second annular plate (9) and a second sealing gasket (11) arranged between the first annular plate (8) and the second annular plate (9); the first annular plate (8) and the second annular plate (9) are respectively fixedly connected to corresponding flanges (4).

2. A tetrafluoroethylene heat exchanger with good sealing performance according to claim 1, characterized in that: The second sealing assembly also includes an engaging groove (10) opened inside the second annular plate (9) and an engaging portion (12) fixedly connected to the bottom of the second sealing gasket (11); the engaging groove (10) and the engaging portion (12) are both arranged in a trapezoidal structure.

3. A tetrafluoroethylene heat exchanger with good sealing performance according to claim 2, characterized in that: The first sealing assembly further comprises two mounting grooves (5) opened inside the corresponding flanges (4), and the two first sealing gaskets (7) are both matched and connected to the corresponding mounting grooves (5).

4. A tetrafluoroethylene heat exchanger with good sealing performance according to claim 3, characterized in that: The first sealing gasket (7) and the second sealing gasket (11) are both polytetrafluoroethylene sealing rings.

5. A tetrafluoroethylene heat exchanger with good sealing performance according to claim 4, characterized in that: The second sealing gasket (11) and the engaging portion (12) are integrally formed.

6. A tetrafluoroethylene heat exchanger with good sealing performance according to claim 5, characterized in that: The connection between the second sealing gasket (11) and the flange (4) is flush.

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