A sealing structure of plate heat exchanger

Abstract

The present invention provides a plate heat exchanger sealing structure, including a heat exchange component, the heat exchange component including a plate heat exchanger and a bracket, a heat exchange tube connecting component is installed on one side of the plate heat exchanger, the heat exchange tube connecting group includes an inner tube and an outer tube, the outer sides of the inner tube and the outer tube are provided with a sealing component, the sealing component includes a ferrule and a sealing ring, the inner side of the ferrule is provided with a clamping component, the clamping component includes a support plate and a guide ring, the plate heat exchanger sealing structure can maintain the clamping force between the inner tube and the outer tube, avoid the generation of gaps due to slight deformation of the material, ensure the firmness of the connection and fixation, ensure the sealing effect, reduce the outflow pressure of the fluid, achieve complete sealing without using excessive clamping force, ensure the safety of the sealing ring, avoid the sealing ring from being too high in temperature, ensure the service life of the sealing ring, reduce the replacement frequency of the sealing ring, and is suitable for the sealed connection between the plate heat exchanger and the heat exchange pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of plate heat exchanger sealing structures, in particular to a plate heat exchanger sealing structure. Background Art

[0002] When using a plate heat exchanger for heat exchange, a sealing structure is required to seal and connect it to the heat exchange pipeline. The existing plate heat exchanger sealing structure basically has the advantages of fast connection speed, easy replacement of sealing components, good working stability, and long service life. It can meet the needs of sealing and connecting the plate heat exchanger to the heat exchange pipeline. However, for the existing plate heat exchanger sealing structure, on the one hand, during the connection work, it is easy to be affected by the pressure of the heat exchange fluid and the vibration generated by the work, which may cause the connection to become loose, and personnel are required to tighten it regularly, increasing manpower consumption. On the other hand, during use, it is easy to be affected by the pressure of the heat exchange fluid, and a larger tightening pressure is required to prevent the fluid from overflowing. However, it is easy to cause the sealing mechanism at the connection to be easily crushed, which is not conducive to ensuring the safety of the seal. On the other hand, during operation, the sealing ring is easily heated by the high-temperature fluid, which may cause the sealing ring to be easily aged and reduce the service life of the sealing ring. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a sealing structure for a plate heat exchanger to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure and diverse functions and is suitable for use in sealing connections between plate heat exchangers and heat exchange pipes.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a plate heat exchanger sealing structure, including a heat exchange component, the heat exchange component includes a plate heat exchanger and a bracket, a heat exchange tube connection component is installed on one side of the plate heat exchanger, the heat exchange tube connection group includes an inner tube and an outer tube, a sealing component is installed on the outer side of the inner tube and the outer tube, the sealing component includes a ferrule and a sealing ring, a clamping component is installed on the inner side of the ferrule, the clamping component includes a support plate and a guide ring, a pressure reducing component is installed on the inner side of the inner tube and the outer tube, the pressure reducing component includes a nesting and a curved surface, a cooling and heat insulation component is installed on the inner side of the inner tube and the outer tube, and the cooling and heat insulation component includes an insulation ring and a ring cavity.

[0005] Furthermore, the bracket is welded to one side of the plate heat exchanger, an inlet and an outlet are provided on one side of the plate heat exchanger, the number of the inlet and the number of the outlet are both 2, the diagonally opposite inlet and outlet on the plate heat exchanger are connected through the inner side of the plate heat exchanger, the outer tube is welded to the inlet, and the inner tube is welded to the outlet.

[0006] Furthermore, the support plate is integrally formed on the outer side of one end of the inner tube, the ferrule is sleeved on the outer side of the support plate, and the guide ring is integrally formed on the inner wall of the other end of the ferrule.

[0007] Furthermore, the guide ring is sleeved on the outside of the inner tube, one end of the spring is welded to one side of the guide ring, and the other end of the spring is coiled on the outside of the inner tube and clamped on the other side of the support plate.

[0008] Furthermore, a rotating sleeve is integrally formed on the outer side of one end of the ferrule, an inner wall of the rotating sleeve is provided with an internal thread, and an outer side of the outer tube is provided with an external thread, and the internal thread and the external thread often match each other.

[0009] Furthermore, the rotating sleeve is provided with a bayonet, which is evenly distributed on the rotating sleeve, the outer side of the outer tube is provided with a slot, the inner side of the bayonet is provided with a bayonet pin, and the other end of the bayonet pin passes through the bayonet and extends to the inner side of the slot.

[0010] Furthermore, the nest is integrally formed at one end of the inner tube, the arc surface is integrally formed on the inner wall of the outer tube, and the outer side of the nest is clamped on the inner wall of the arc surface.

[0011] Furthermore, the sealing ring is clamped between the support plate and the outer tube, the outer diameter of the inner tube is equal to the inner diameter of the outer tube, and the nesting is located on the inner side of the rotating sleeve.

[0012] Furthermore, the insulation ring is clamped on the inner wall of the inner tube, the insulation ring is located on the inner side of the sealing ring, the ring cavity is opened on the inner side of the tube wall of the outer tube, and the ring cavity is located on one side of the sealing ring.

[0013] Furthermore, an inlet pipe is welded to the top of the outer tube, an outlet pipe is welded to the bottom of the outer tube, a connecting pipe is opened on the inner side of the tube wall of the outer tube, and the inlet pipe and the outlet pipe are both connected to the annular cavity through the connecting pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the plate heat exchanger sealing structure is used, when the inner tube and the outer tube are connected and fixed, the sealing ring is set on one end of the inner tube and clamped on one side of the support plate, and the outer tube is clamped on one side of the sealing ring, and then the hook spanner is used to clamp it into the bayonet on the rotating sleeve, and the rotating sleeve is rotated by the hook spanner. The rotating sleeve is screwed on the outer side of the outer tube (on the attached Figure 3The outer tube is squeezed to the left by the pulling direction of the rotating sleeve, so that the inner tube and the outer tube seal and clamp the two sides of the sealing ring. When the rotating sleeve is rotated to the outside of the card slot, the bayonet pin is passed through the bayonet and clamped on the inside of the card slot, and then the rotating sleeve and the outer tube are fixed by the bayonet pin to avoid reverse rotation between the rotating sleeve and the outer tube. At the same time, the elastic force of the spring is used to maintain a large clamping force between the inner tube and the outer tube to avoid gaps between the inner tube and the outer tube and the sealing ring due to slight deformation of the material. It can not only ensure the firmness of the connection and fixation, but also maintain a stable sealing pressure to ensure the sealing effect.

[0016] 2. When the sealing structure of the plate heat exchanger is in use, after the connection is completed, when the fluid flows from the inside of the inner tube to the inside of the outer tube, the pressure of the fluid is used to squeeze the nest outward, and the outer tube outside the arc surface is clamped by the rotating sleeve to ensure the seal between the nest and the arc surface. At the same time, the inward contraction of the arc surface makes the contact position between the nest and the arc surface produce a Venturi tube effect, thereby greatly reducing the pressure of the fluid at this location, thereby effectively reducing the outflow pressure of the fluid through the nest and the arc surface. The effect of complete sealing can be achieved without using excessive sealing pressure, which effectively reduces the sealing pressure, avoids the sealing ring from being damaged due to excessive pressure, and ensures the safe use of the sealing ring.

[0017] 3. When the sealing structure of the plate heat exchanger is in use, the inlet pipe is connected to cold water. The cold water enters the ring cavity through the inlet pipe and the connecting pipe to cool the sealing ring and flows out through the connecting pipe and the outlet pipe. At the same time, the heat insulation ring is used to reduce the rate at which the heat of the internal fluid is transferred to the sealing ring, thereby effectively preventing the sealing ring from being deformed or even melted due to excessive temperature, ensuring the service life of the sealing ring, reducing the replacement frequency of the sealing ring, and ensuring the working efficiency of the plate heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sealing structure of a plate heat exchanger of the present invention;

[0019] Figure 2 A cross-sectional view of a sealing structure of a plate heat exchanger according to the present invention;

[0020] Figure 3 It is a structural schematic diagram of a ferrule of a sealing structure of a plate heat exchanger of the present invention;

[0021] Figure 4 A cross-sectional view of a ferrule of a sealing structure of a plate heat exchanger according to the present invention;

[0022] Figure 5 A top cross-sectional view of a ferrule of a sealing structure of a plate heat exchanger according to the present invention;

[0023] In the figure: 1. plate heat exchanger; 2. bracket; 3. inner tube; 4. outer tube; 5. ferrule; 6. support plate; 7. guide ring; 8. spring; 9. nesting; 10. arc surface; 11. sealing ring; 12. insulation ring; 13. ring cavity; 14. rotating sleeve; 15. inlet pipe; 16. outlet pipe; 17. connecting pipe; 18. external thread; 19. internal thread; 20. slot; 21. bayonet; 22. bayonet pin. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] See also Figures 1 to 5 The present invention provides a technical solution: a plate heat exchanger sealing structure, comprising a heat exchange component, the heat exchange component comprising a plate heat exchanger 1 and a bracket 2, a heat exchange tube connection component is installed on one side of the plate heat exchanger 1, the heat exchange tube connection group comprises an inner tube 3 and an outer tube 4, a sealing component is installed on the outer side of the inner tube 3 and the outer tube 4, the sealing component comprises a ferrule 5 and a sealing ring 11, a clamping component is installed on the inner side of the ferrule 5, the clamping component comprises a support plate 6 and a guide ring 7, a pressure reduction component is installed on the inner side of the inner tube 3 and the outer tube 4, the pressure reduction component comprises a nesting 9 and a curved surface 10, a cooling and heat insulation component is installed on the inner side of the inner tube 3 and the outer tube 4, the cooling and heat insulation component comprises a heat insulation ring 12 and a ring Cavity 13, the bracket 2 is welded to one side of the plate heat exchanger 1, and an inlet and an outlet are provided on one side of the plate heat exchanger 1, and the number of the inlet and the outlet are both 2. The diagonally opposite inlet and outlet on the plate heat exchanger 1 are connected through the inner side of the plate heat exchanger 1, and the outer tube 4 is welded to the inlet, and the inner tube 3 is welded to the outlet. When working, the inner tube 3 and the outer tube 4 can be sealed and welded to the outlet and the inlet on the plate heat exchanger 1 respectively, and the outer tube 4 and the inner tube 3 matched therewith are welded to the communicating pipeline, so as to ensure that the flow direction of the fluid is from the inner tube 3 to the outer tube 4, so as to avoid the fluid from impacting the gap between the nesting 9 and the arc surface 10 when flowing, and ensure the sealing effect.

[0026] In this embodiment, the support plate 6 is integrally formed on the outer side of one end of the inner tube 3, the ferrule 5 is sleeved on the outer side of the support plate 6, the guide ring 7 is integrally formed on the inner wall of the other end of the ferrule 5, the guide ring 7 is sleeved on the outer side of the inner tube 3, one end of the spring 8 is welded on one side of the guide ring 7, the other end of the spring 8 is coiled on the outer side of the inner tube 3 and clamped on the other side of the support plate 6, a rotating sleeve 14 is integrally formed on the outer side of one end of the ferrule 5, an internal thread 19 is provided on the inner wall of the rotating sleeve 14, and an external thread 18 is provided on the outer side of the outer tube 4, and the internal thread 19 often matches the external thread 18. The rotating sleeve 14 is provided with a bayonet 21, and the bayonet 21 is evenly distributed on the rotating sleeve 14. A card slot 20 is provided on the outer side of the outer tube 4. A bayonet pin 22 is clamped on the inner side of the bayonet 21. One end of the bayonet pin 22 passes through the bayonet 21 and extends to the inner side of the card slot 20. When the inner tube 3 and the outer tube 4 are connected and fixed, the sealing ring 11 is sleeved on one end of the inner tube 3 and clamped on one side of the support plate 6, and the outer tube 4 is clamped on one side of the sealing ring 11, and then the hook spanner is clamped into the bayonet 21 on the rotating sleeve 14. The rotating sleeve 14 is rotated by the hook spanner, and the rotating sleeve 14 is screwed on the outer side of the outer tube 4 (attached Figure 3 The outer tube 4 is pressed to the left under the pull of the rotating sleeve 14, so that the inner tube 3 and the outer tube 4 seal and clamp the two sides of the sealing ring 11. When the rotating sleeve 14 is rotated to the outside of the card slot 20, the bayonet 22 is passed through the bayonet 21 and clamped on the inner side of the card slot 20, and then the bayonet 22 is used to fix the rotating sleeve 14 and the outer tube 4 to avoid reverse rotation between the rotating sleeve 14 and the outer tube 4. At the same time, the elastic force of the spring 8 is used to maintain sufficient clamping force between the inner tube 3 and the outer tube 4 to avoid gaps between the inner tube 3 and the outer tube 4 and the sealing ring 11 due to slight deformation of the material, which can not only ensure the firmness of the connection and fixation, but also maintain a stable sealing pressure to ensure the sealing effect.

[0027] In this embodiment, the nesting 9 is integrally formed at one end of the inner tube 3, the arc surface 10 is integrally formed on the inner wall of the outer tube 4, the outer side of the nesting 9 is clamped on the inner wall of the arc surface 10, and the sealing ring 11 is clamped between the support plate 6 and the outer tube 4. The outer diameter of the inner tube 3 is equal to the inner diameter of the outer tube 4, and the nesting 9 is located on the inner side of the rotating sleeve 14. After the connection is completed, when the fluid flows from the inner side of the inner tube 3 to the inner side of the outer tube 4, the nesting 9 is squeezed outward by the pressure of the fluid, and the outer tube 4 outside the arc surface 10 is clamped by the rotating sleeve 14 to ensure the seal between the nesting 9 and the arc surface 10. At the same time, the inward contraction of the arc surface 10 is used to make the contact position of the nesting 9 and the arc surface 10 produce a Venturi effect, thereby greatly reducing the pressure of the fluid at this location, thereby effectively reducing the outflow pressure of the fluid through the nesting 9 and the arc surface 10, and the effect of complete sealing can be achieved without using excessive sealing pressure, effectively reducing the sealing pressure, avoiding the sealing ring 11 from being damaged due to excessive pressure, and ensuring the safe use of the sealing ring 11.

[0028] In this embodiment, the insulation ring 12 is stuck on the inner wall of the inner tube 3, the insulation ring 12 is located on the inner side of the sealing ring 11, the annular cavity 13 is opened on the inner side of the tube wall of the outer tube 4, the annular cavity 13 is located on one side of the sealing ring 11, the top of the outer tube 4 is welded with an inlet pipe 15, the bottom of the outer tube 4 is welded with an outlet pipe 16, the inner side of the tube wall of the outer tube 4 is opened with a connecting pipe 17, the inlet pipe 15 and the outlet pipe 16 are connected to the annular cavity 13 through the connecting pipe 17, and the inlet pipe 15 and the outlet pipe 16 are connected to the annular cavity 13 through the connecting pipe 17. The tube 15 is externally connected to cold water, and the cold water enters the annular cavity 13 through the inlet tube 15 and the connecting tube 17 to cool the sealing ring 11, and flows out through the connecting tube 17 and the outlet tube 16. At the same time, the heat insulating ring 12 is used to reduce the rate at which the heat of the internal fluid is transferred to the sealing ring 11, thereby effectively preventing the sealing ring 11 from being deformed or even melted due to excessive temperature, thereby ensuring the service life of the sealing ring 11, reducing the replacement frequency of the sealing ring 11, and ensuring the working efficiency of the plate heat exchanger.

[0029] When the sealing structure of the plate heat exchanger is in use, the inner tube 3 and the outer tube 4 are respectively sealed and welded to the outlet and the inlet of the plate heat exchanger 1, and the outer tube 4 and the inner tube 3 that match them are welded to the connected pipeline, so as to ensure that the flow direction of the fluid is from the inner tube 3 to the outer tube 4, so as to avoid the fluid from impacting the gap between the nesting 9 and the arc surface 10 when flowing, and ensure the sealing effect. When the inner tube 3 and the outer tube 4 are connected and fixed, the sealing ring 11 is sleeved on one end of the inner tube 3 and clamped on one side of the support plate 6, and the outer tube 4 is clamped on one side of the sealing ring 11, and then clamped into the bayonet 21 on the rotating sleeve 14 through a hook wrench, and the rotating sleeve 14 is rotated by the hook wrench, and the rotating sleeve 14 is threaded on the outer side of the outer tube 4 (attached Figure 3As shown in the figure, the sleeve 5 moves to the right, thereby causing the clamping sleeve 5 to move to the right outside the inner tube 3 and the outer tube 4. The guide ring 7 in the clamping sleeve 5 compresses the spring 8, and uses the elastic force of the spring 8 to squeeze the support plate 6 to the right. The outer tube 4 is squeezed to the left under the pull of the rotating sleeve 14, thereby causing the inner tube 3 and the outer tube 4 to seal and clamp the two sides of the sealing ring 11. When the rotating sleeve 14 is rotated to the outside of the card slot 20, the bayonet pin 22 is passed through the bayonet port 21 and clamped on the inside of the card slot 20, and then the rotating sleeve 14 and the outer tube 4 are locked by the bayonet pin 22. The inner tube 3 and the outer tube 4 are fixed to prevent the reverse rotation between the rotating sleeve 14 and the outer tube 4. At the same time, the elastic force of the spring 8 is used to maintain sufficient clamping force between the inner tube 3 and the outer tube 4 to prevent a gap between the inner tube 3 and the outer tube 4 and the sealing ring 11 due to slight deformation of the material. This can not only ensure the firmness of the connection and fixation, but also maintain a stable sealing pressure to ensure the sealing effect. The inlet pipe 15 is connected to cold water, and the cold water enters the annular cavity 13 through the inlet pipe 15 and the connecting pipe 17 to cool the sealing ring 11 and cool it down through The connecting pipe 17 and the outlet pipe 16 flow outward, and the heat insulating ring 12 is used to reduce the rate at which the heat of the internal fluid is conducted to the sealing ring 11, thereby effectively preventing the sealing ring 11 from being deformed or even melted due to excessive temperature, ensuring the service life of the sealing ring 11, reducing the replacement frequency of the sealing ring 11, and ensuring the working efficiency of the plate heat exchanger. After the connection is completed, when the fluid flows from the inner side of the inner tube 3 to the inner side of the outer tube 4, the pressure of the fluid is used to squeeze the nest 9 outward, and the outer tube 4 outside the arc surface 10 is clamped by the rotating sleeve 14 to ensure the seal between the nest 9 and the arc surface 10. At the same time, the inward contraction of the arc surface 10 makes the contact position between the nest 9 and the arc surface 10 produce a Venturi effect, thereby greatly reducing the pressure of the fluid at this location, thereby effectively reducing the outflow pressure of the fluid through the nest 9 and the arc surface 10, and the effect of complete sealing can be achieved without using excessive sealing pressure, effectively reducing the sealing pressure, avoiding the sealing ring 11 from being damaged due to excessive pressure, and ensuring the safe use of the sealing ring 11.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plate heat exchanger sealing structure, comprising a heat exchange assembly, the heat exchange assembly comprising a plate heat exchanger (1) and a bracket (2), a heat exchange tube connection assembly being installed on one side of the plate heat exchanger (1), the heat exchange tube connection assembly comprising an inner tube (3) and an outer tube (4), a sealing assembly being installed on the outer sides of the inner tube (3) and the outer tube (4), the sealing assembly comprising a ferrule (5) and a sealing ring (11), Features: A clamping assembly is installed on the inner side of the sleeve (5), and the clamping assembly includes a support plate (6) and a guide ring (7). A pressure reducing assembly is installed on the inner side of the inner tube (3) and the outer tube (4), and the pressure reducing assembly includes a nest (9) and a curved surface (10). A cooling and heat insulation assembly is installed on the inner side of the inner tube (3) and the outer tube (4), and the cooling and heat insulation assembly includes a heat insulation ring (12) and a ring cavity (13). The bracket (2) is welded to one side of the plate heat exchanger (1). An inlet and an outlet are provided on one side of the plate heat exchanger (1), and the number of the inlet and the outlet are both 2. The plate heat exchanger (1) has an obliquely opposite inlet and an outlet. The inlet and outlet of the corner are connected through the inner side of the plate heat exchanger (1), the outer tube (4) is welded to the inlet, the inner tube (3) is welded to the outlet, the support plate (6) is integrally formed on the outer side of one end of the inner tube (3), the clamping sleeve (5) is sleeved on the outer side of the support plate (6), the guide ring (7) is integrally formed on the inner wall of the other end of the clamping sleeve (5), the guide ring (7) is sleeved on the outer side of the inner tube (3), one end of the spring (8) is welded to one side of the guide ring (7), the other end of the spring (8) is coiled on the outer side of the inner tube (3) and clamped on the other side of the support plate (6), the outer side of one end of the clamping sleeve (5) The outer side of the outer tube (4) is integrally formed with a rotating sleeve (14), the inner wall of the rotating sleeve (14) is provided with an internal thread (19), the outer side of the outer tube (4) is provided with an external thread (18), and the internal thread (19) and the external thread (18) are often matched, the rotating sleeve (14) is provided with a bayonet (21), and the bayonet (21) is evenly distributed on the rotating sleeve (14), the outer side of the outer tube (4) is provided with a card slot (20), the inner side of the bayonet (21) is clamped with a bayonet pin (22), one end of the bayonet pin (22) passes through the bayonet pin (21) and extends to the inner side of the card slot (20), and the nest (9) is integrally formed on the inner tube The outer end of the outer tube (3) is provided with a curved surface (10) integrally formed on the inner wall of the outer tube (4), the outer side of the nest (9) is clamped on the inner wall of the curved surface (10), the sealing ring (11) is clamped between the support plate (6) and the outer tube (4), the outer diameter of the inner tube (3) is equal to the inner diameter of the outer tube (4), the nest (9) is located on the inner side of the rotating sleeve (14), the heat insulating ring (12) is clamped on the inner wall of the inner tube (3), the heat insulating ring (12) is located on the inner side of the sealing ring (11), the annular cavity (13) is opened on the inner side of the tube wall of the outer tube (4), and the annular cavity (13) is located on one side of the sealing ring (11).

2. A plate heat exchanger sealing structure according to claim 1, Features: An inlet pipe (15) is welded to the top of the outer tube (4), an outlet pipe (16) is welded to the bottom of the outer tube (4), a connecting pipe (17) is provided on the inner side of the tube wall of the outer tube (4), and both the inlet pipe (15) and the outlet pipe (16) are connected to the annular cavity (13) via the connecting pipe (17).

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