High-pressure-resistant plate heat exchanger
By wrapping the protective film of high-temperature and high-pressure material on the main body of the plate heat exchanger and clamping the protective film with a fixed device, the problem of deformation and leakage of the plate heat exchanger in a high-temperature and high-pressure environment is solved, and higher sealing and pressure bearing capacity are achieved.
Patent Information
- Application Number
- CN202421446262.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-24
AI Technical Summary
Existing plate heat exchangers are prone to local deformation or bulging in high temperature and high pressure environments, resulting in internal leakage and scrapping, and traditional sealing measures cannot effectively restrict the deformation and leakage of the plate.
A high-pressure-resistant plate-type heat exchanger is designed. By wrapping a protective film made of high-temperature and high-pressure material on the outside of the heat exchanger body, and clamping the protective film to apply pressure to enhance sealing and pressure bearing capacity.
It effectively prevents the heat exchanger body from being compressed and deformed under high pressure, improves the overall pressure bearing capacity and sealing, prevents material leakage and timely detects leakage conditions. It also has a thermal insulation effect and reduces heat loss.
Smart Images
Figure CN222824871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plate heat exchangers, in particular to a high-pressure resistant plate heat exchanger. Background Art
[0002] The plate heat exchanger is a high-efficiency heat exchanger made of a series of stacked metal sheets with a certain corrugated shape. Thin rectangular channels are formed between the various plates, and heat is exchanged through the plates; the cross-corrugations between the plates not only form channels, but also have pressure-bearing and fixing functions.
[0003] The application of brazed plate heat exchangers in the high temperature and high pressure industry has not received widespread attention. The main reason is that the heat exchangers selected by the industry require a high pressure of 14Mpa. After the traditional heat exchanger is subjected to the high temperature and high pressure of the medium, it will be partially deformed or bulged. The greater the deformation, the larger the tearing space of the plate, which will eventually lead to internal leakage and scrap.
[0004] In order to prevent the heat exchange medium of the plate heat exchanger from leaking into the external environment, a sealing cover is usually used to cover all the plates. However, such an operation is only a remedial measure after a leak occurs. The protective cover cannot limit the plates, nor can it restrain the deformation of the plates after being under pressure. Moreover, it is difficult to detect medium leakage in time after covering with a protective cover, which poses certain safety hazards.
[0005] Therefore, there is an urgent need for a high-pressure plate heat exchanger that is highly sealed and safe to use. Utility Model Content
[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a high-pressure resistant plate heat exchanger which has strong sealing performance and is safe to use.
[0007] The purpose of the utility model is achieved in this way:
[0008] A high-pressure plate heat exchanger comprises a heat exchanger body, which is formed by stacking plates and then brazing them. The heat exchanger body is clamped and fixed by clamps at both ends, and the clamps at both ends are fixed by screws and nuts. Pipes are fixedly provided on the outer walls at both ends of the heat exchanger body, and the pipes pass through the clamps and are fixed to flanges by welding. Gaskets are sleeved and installed at both ends of the heat exchanger body, and the gaskets are located on the inner side of the clamps. The gaskets are clamped and fixed by pressing plates on all sides. The pressing plates are sleeved and installed on the screws and fixed by screwing on the fixing nuts installed on the screws. The middle part of the heat exchanger body is wrapped with a protective film, and the two ends of the protective film are clamped and fixed as a whole by fixing devices, and the edges on both sides of the protective film are wrapped on the outside of the gasket.
[0009] Preferably, the fixing device includes a connecting plate with an "L"-shaped plate structure in cross section, the connecting plates of the fixing device at both ends of the protective membrane are fixed by bolts, a through groove is opened at the lower part of the long side of one side of the connecting plate, and a membrane clamp is installed on the short side of the other side of the connecting plate, the membrane clamp is movably connected to the connecting plate through support seats fixed at both ends, and the end of the protective membrane passes through the through groove from the bottom of the connecting plate and is clamped and fixed by the membrane clamp.
[0010] Preferably, a support seat is fixedly provided at the top end of the membrane clamp, a support screw is screwed and installed at the middle position of the support seat, a circular groove for accommodating the support screw is opened on the outer wall of the long side of one side of the connecting plate, and the end of the support screw passes through the support seat and is inserted into the groove.
[0011] Preferably, the contact surfaces of the connecting plate and the membrane clamping plate are both provided with serrated grooves.
[0012] Preferably, the protective film is made of a material resistant to high temperature and high pressure.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model is a high-pressure plate heat exchanger, which is wrapped with a protective film on the outside of the heat exchanger body and applies a certain pressure to the heat exchanger body through the protective film, thereby further preventing the heat exchanger body from being deformed by pressure, improving the overall pressure-bearing capacity, and sealing the heat exchanger body to prevent leakage into the external environment after leakage occurs, and timely discovering the leakage condition, while the gasket seals the two ends of the heat exchanger body to prevent leakage from the two ends of the heat exchanger body after leakage, and at the same time, combined with the protective film, it also has a certain thermal insulation effect to reduce heat loss.
[0015] 2. The utility model provides a high-pressure plate heat exchanger, which is fixed as a whole by clamping the two ends of the protective film through a fixing device, and the two ends of the protective film are clamped and fixed by a film clamp. After the film clamp is clamped, the protective film can be prevented from moving, thereby ensuring the tension of the protective film. Therefore, a certain pressure can be applied to the heat exchanger body after installation, and it can be suitable for heat exchange plates of different sizes and specifications. At the same time, it is convenient for the installation operation of the protective film, and the protective film is clamped by the connecting plate to ensure the overall sealing.
[0016] 3. The utility model is a high-pressure plate heat exchanger, in which a support screw is screwed and installed on a support seat at the top of a membrane clamp, and a circular groove for accommodating the support screw is provided on the outer wall of the connecting plate. The support screw is extended and retracted by screwing the thread, and the support screw and the groove on the outer wall of the connecting plate are plugged in to limit the membrane clamp, so that the membrane clamp clamps the protective membrane to prevent the protective membrane from loosening, and the serrated grooves provided on the contact surfaces of the connecting plate and the membrane clamp increase the friction with the protective membrane to further prevent the protective membrane from loosening. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a three-dimensional structural schematic diagram of a high-pressure resistant plate heat exchanger.
[0018] Figure 2 The utility model is a schematic diagram of the internal structure of a high-pressure resistant plate heat exchanger.
[0019] Figure 3 The utility model is a schematic diagram of a partial explosion structure of a high-pressure resistant plate heat exchanger.
[0020] Figure 4 The utility model is a structural schematic diagram of a fixing device for a high-pressure plate heat exchanger.
[0021] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a fixing device for a high-pressure plate heat exchanger.
[0022] Among them: heat exchanger body 1, clamping plate 2, screw 3, connecting pipe 4, flange 5, gasket 6, pressure plate 7, fixing nut 8, protective film 9, fixing device 10, connecting plate 10.1, through groove 10.2, membrane clamping plate 10.3, support seat 10.4, support screw 10.5. DETAILED DESCRIPTION
[0023] See also Figures 1 to 5 The utility model relates to a high-pressure resistant plate heat exchanger, including a heat exchanger body 1, which is formed by stacking plates and then brazing. The heat exchanger body 1 is clamped and fixed by clamping plates 2 at both ends, and the clamping plates 2 at both ends are fixed around by screws 3 and nuts. A pipe 4 is fixedly arranged on the outer wall at both ends of the heat exchanger body 1. The pipe 4 passes through the clamping plate 2 and is fixed to the flange 5 by welding. Gaskets 6 are sleeved and installed at both ends of the heat exchanger body 1. The gasket 6 is located on the inner side of the clamping plate 2. The gasket 6 is pressed and fixed around by a pressing plate 7. The pressing plate 7 is sleeved and installed on the screw 3 and fixed by a fixing nut 8 screwed on the screw 3, which fixes the gasket 6 and seals the two ends of the heat exchanger body 1 to prevent leakage from the two ends of the heat exchanger body 1 after leakage. At the same time, it also has a certain thermal insulation effect combined with the protective film 9 to reduce heat loss.
[0024] The middle part of the heat exchanger body 1 is wrapped with a protective film 9, and the two ends of the protective film 9 are clamped and fixed as a whole by a fixing device 10. The edges on both sides of the protective film 9 are wrapped on the outside of the gasket 6. The protective film 9 is made of high temperature and high pressure resistant material. A certain pressure is applied to the heat exchanger body 1 through the protective film 9 to further prevent its deformation under pressure, improve the overall pressure bearing capacity, and seal the heat exchanger body 1 to prevent leakage into the external environment after leakage occurs, and can also detect leakage in time.
[0025] The fixing device 10 includes a connecting plate 10.1 with an L-shaped plate structure in cross section. The connecting plates 10.1 of the fixing device 10 at both ends of the protective membrane 9 are connected and fixed by bolts, and the protective membrane 9 is clamped by the connecting plates 10.1 to ensure the overall sealing.
[0026] A through groove 10.2 is provided at the lower part of the long side of one side of the connecting plate 10.1, and a membrane clamp 10.3 is installed on the short side of the other side of the connecting plate 10.1. The membrane clamp 10.3 is movably connected to the connecting plate 10.1 through support seats 10.4 fixed at both ends. The end of the protective film 9 passes through the through groove 10.2 from the bottom of the connecting plate 10.1 and is clamped and fixed by the membrane clamp 10.3. After the membrane clamp 10.3 is clamped and fixed, the protective film 9 is prevented from moving, thereby ensuring the tension of the protective film 9, so that a certain pressure can be applied to the heat exchanger body 1 after installation, and it can be suitable for heat exchange plates of different sizes and specifications, and at the same time facilitates the installation operation of the protective film 9.
[0027] Furthermore, a support seat 10.4 is fixedly provided on the top of the membrane clamp 10.3, and a support screw 10.5 is screwed and installed in the middle position of the support seat 10.4. A circular groove for accommodating the support screw 10.5 is opened on the outer wall of the long side of the connecting plate 10.1. The end of the support screw 10.5 passes through the support seat 10.4 and is inserted into the groove. The support screw 10.5 is extended and retracted by screwing the thread. After the support screw 10.5 is inserted into the groove on the outer wall of the connecting plate 10.1, it plays a limiting role on the membrane clamp 10.3, so that the membrane clamp 10.3 clamps the protective film 9 to prevent the protective film 9 from loosening.
[0028] Furthermore, the contact surfaces of the connecting plate 10.1 and the membrane clamping plate 10.3 are provided with serrated grooves to increase the friction with the protective film and further prevent the protective film from loosening.
[0029] The utility model discloses a high-pressure plate heat exchanger having the following working principle: the heat exchange medium enters the interior of the heat exchanger main body 1 through the pipe 4 and the flange 5 at both ends of the heat exchanger main body 1, and realizes heat exchange in the interior of the heat exchanger main body 1, and the heat exchanger main body 1 is formed by brazing stainless steel and copper, and is a closed whole. When installing the protective film 9, firstly, the two ends of the protective film 9 are passed through the through groove 10.2 and clamped by the film clamping plate 10.3, and the support screw 10.5 is screwed so that the end of the support screw 10.5 is inserted into the groove on the outer wall of the connecting plate 10.1 to prevent the film clamping plate 10.3 from loosening, and then the heat exchanger main body 1 is wrapped with the protective film 9 and the fixing devices 10 at both ends are tightened, and then the connecting plates 10.1 of the fixing devices 10 at both ends are connected and tightened by bolts, and the protective film 9 is pressed by the connecting plate 10.1 to realize sealing.
[0030] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.
Claims
1. A high pressure resistant plate heat exchanger, characterized in that: The heat exchanger comprises a heat exchanger body (1), wherein the heat exchanger body (1) is formed by stacking plates and then brazing them, the heat exchanger body (1) is clamped and fixed by clamping plates (2) at both ends, the clamping plates (2) at both ends are fixed around by screws (3) and nuts, a pipe (4) is fixedly provided on the outer wall at both ends of the heat exchanger body (1), the pipe (4) passes through the clamping plate (2) and is fixed to the flange (5) by welding, and gaskets (6) are installed at both ends of the heat exchanger body (1). The gasket (6) is located on the inner side of the clamping plate (2), and the four sides of the gasket (6) are pressed and fixed by a pressure plate (7). The pressure plate (7) is sleeved and installed on the screw rod (3) and fixed by a fixing nut (8) screwed on the screw rod (3). The middle part of the heat exchanger body (1) is wrapped with a protective film (9), and the two ends of the protective film (9) are clamped and fixed as a whole by a fixing device (10). The edges of both sides of the protective film (9) are wrapped on the outside of the gasket (6).
2. A high pressure resistant plate heat exchanger according to claim 1, characterized in that: The fixing device (10) comprises a connecting plate (10.1) having an "L"-shaped plate structure in cross section. The connecting plates (10.1) of the fixing device (10) at both ends of the protective membrane (9) are fixed by bolts. A through groove (10.2) is provided at the lower part of the long side of one side of the connecting plate (10.1). A membrane clamping plate (10.3) is installed on the short side of the other side of the connecting plate (10.1). The membrane clamping plate (10.3) is movably connected to the connecting plate (10.1) via support seats (10.4) fixed at both ends. The end of the protective membrane (9) passes through the through groove (10.2) from the bottom of the connecting plate (10.1) and is clamped and fixed by the membrane clamping plate (10.3).
3. A high pressure plate heat exchanger according to claim 2, characterized in that: A support seat (10.4) is fixedly provided at the top end of the membrane clamp (10.3), a support screw (10.5) is screwed and installed in the middle position of the support seat (10.4), and a circular groove for accommodating the support screw (10.5) is opened on the outer wall of the long side of one side of the connecting plate (10.1), and the end of the support screw (10.5) passes through the support seat (10.4) and is inserted into the groove.
4. A high pressure resistant plate heat exchanger according to claim 2, characterized in that: The contact surfaces of the connecting plate (10.1) and the membrane clamping plate (10.3) are both provided with sawtooth-shaped grooves.
5. The high pressure plate heat exchanger according to claim 1, characterized in that: The protective film (9) is made of a high temperature and high pressure resistant material.