An automatically pressure-adjustable leak-proof plate heat exchanger and method

Abstract

The present application relates to plate heat exchanger technical field, especially to a kind of automatically pressure-regulated anti-leakage plate heat exchanger and method.A kind of automatically pressure-regulated anti-leakage plate heat exchanger, including fixed plate, heat exchange plate group, movable plate, fixed frame, fixed rod group and first limiting nut, movable plate and fixed frame between being provided with top pressure component, for the connection stability between fixed plate and heat exchange plate group, heat exchange plate group and movable plate;Fixed plate side away from heat exchange plate group is respectively provided with liquid inlet pipe group and liquid outlet pipe group, and the end of liquid inlet pipe group away from fixed plate is provided with buffer component.The present application is designed by the structure cooperation of fixed plate, heat exchange plate group, movable plate, detour plate group, so that the overall length of device can be greatly reduced under the condition of ensuring heat exchange stroke unchanged, and the overall length of device is reduced, so that maintenance space increases or installation is carried out in some special places with limited length space.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, and more particularly to an automatically pressure-regulating, leak-proof plate heat exchanger and method. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger consisting of a series of metal plates with a certain corrugated shape. By transporting two fluids, hot and cold, into the plate heat exchanger through corresponding delivery pipes, the heat energy in the hot water is diffused out as the cold and hot water move sequentially through multiple metal plates installed in the plate heat exchanger, thereby achieving the exchange of heat between the cold and hot water.

[0003] For example, Chinese utility model patent (CN218627884U) discloses a high-performance detachable plate heat exchanger, which states: "The structure is reasonably designed and easy to use, which makes the side clamping rod installation more stable and firm. At the same time, the side of the support rod also makes the heat exchange plate installation more stable." It also states: "The traditional detachable plate heat exchanger assembly usually has a U-shaped through groove on the clamping plate to facilitate the placement of the side clamping rod, and then the side clamping rod is fixed in the U-shaped through groove by a nut. This form causes the nut to loosen after long-term use of the detachable plate heat exchanger, resulting in the side clamping rod being unable to effectively clamp the heat exchange plate."

[0004] In summary, the following technical problems exist in the prior art: Traditional detachable plate heat exchangers require multiple heat exchange plates to ensure the total heat exchange stroke, which increases the overall length of the device. Using large heat exchange plates can effectively reduce the overall length of the device, but the large number of large heat exchange plates increases the cost. Therefore, this application proposes an automatically pressure-regulating leak-proof plate heat exchanger to provide a new technical solution to solve the technical problems mentioned in the above patent. Summary of the Invention

[0005] The purpose of this invention is to provide an automatically pressure-regulating, leak-proof plate heat exchanger and method to solve the existing problems: traditional detachable plate heat exchangers require multiple heat exchange plates to ensure the total heat exchange stroke, which increases the overall length of the device. Using large heat exchange plates can effectively reduce the overall length of the device, but the large number of large heat exchange plates leads to increased costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatically pressure-adjustable, leak-proof plate heat exchanger includes a fixed plate, a heat exchange plate assembly, a movable plate, a fixed frame, a fixed rod assembly, and a first limiting nut. A top-pressure assembly is provided between the movable plate and the fixed frame to ensure the connection stability between the fixed plate and the heat exchange plate assembly, and between the heat exchange plate assembly and the movable plate. An inlet pipe assembly and a outlet pipe assembly are respectively provided on the side of the fixed plate away from the heat exchange plate assembly, and a buffer assembly is provided at the end of the inlet pipe assembly away from the fixed plate.

[0008] The fixed plate has heat exchange tank one and heat exchange tank two respectively on the side near the heat exchange plate group. The heat exchange plate group is set into two groups, which are symmetrically arranged. The two groups of heat exchange plate groups correspond to the positions of heat exchange tank one and heat exchange tank two respectively. The liquid inlet pipe group corresponds to the position of one of the heat exchange plate groups, and the liquid outlet pipe group corresponds to the position of the other heat exchange plate group.

[0009] A bypass plate group is provided between the two sets of heat exchange plate groups and the movable plate, which is used to introduce the heat exchange liquid in one set of heat exchange plate groups into the other set of heat exchange plate groups for continued heat exchange.

[0010] Preferably, the liquid inlet pipe assembly includes a first liquid inlet pipe and a second liquid inlet pipe. The first liquid inlet pipe is connected to a heat exchange tank, and the second liquid inlet pipe is directly connected to a corresponding heat exchange plate assembly. The liquid outlet pipe assembly includes a first liquid outlet pipe and a second liquid outlet pipe. The first liquid outlet pipe is connected to a heat exchange tank, and the second liquid outlet pipe is directly connected to a corresponding heat exchange plate assembly.

[0011] Preferably, the upper and lower ends of the fixed plate near the movable plate are both fixedly connected to the guide frame assembly, and the heat exchange plate assembly, movable plate, and detour plate assembly are all horizontally inserted into the guide frame assembly.

[0012] Preferably, the guide frame assembly includes a guide frame body one and a guide frame body two. The guide frame body one is U-shaped and the guide frame body two is L-shaped. The upper and lower ends of the heat exchange plate assembly, the movable plate, and the detour plate assembly are all provided with guide groove one and guide groove two. The heat exchange plate assembly, the movable plate, and the detour plate assembly are all horizontally inserted and connected to the guide frame body one and the guide frame body two through the guide groove one and guide groove two provided at the upper and lower ends, respectively.

[0013] Preferably, the detour plate assembly includes a first detour heat exchange plate and a second detour heat exchange plate. The second detour heat exchange plate is located between the first detour heat exchange plate and the movable plate. The first detour heat exchange plate has heat exchange grooves three on the side close to the heat exchange plate assembly and at positions corresponding to the two heat exchange plate assemblies. The first and second detour heat exchange plates have heat exchange grooves four on the side close to each other. The second detour heat exchange plate has heat exchange grooves five on the side close to the movable plate. When the first and second detour heat exchange plates are in contact, the two heat exchange grooves four form a reflux cavity one. When the second detour heat exchange plate is in contact with the movable plate, the two heat exchange grooves five form a reflux cavity two.

[0014] Preferably, the first detour heat exchange plate has liquid outlet 2 on its side and at the upper and lower ends of the two heat exchange tanks 3. The first detour heat exchange plate has a corresponding number of liquid outlet 1 near the liquid outlet 2. The second detour heat exchange plate has liquid outlet 3 corresponding to the number and position of the liquid outlet 2. The two heat exchange tanks 3 on the first detour heat exchange plate are connected to the return cavity 2 through the corresponding liquid outlet 2 and liquid outlet 3. The two sets of heat exchange plates are connected to the return cavity 1 through the corresponding liquid outlet 1.

[0015] Preferably, the top-pressing assembly includes a pusher frame located between the movable plate and the fixed frame. A rotating rod is rotatably connected to the middle of the pusher frame, and the rotating rod is threadedly connected to the fixed frame. The rotating rod is also rotatably connected to the fixed rod assembly. The pusher frame is X-shaped, and extensions are provided on the side of the pusher frame closest to the fixed frame and at each of the four corners. The fixed frame has guide slots corresponding to the extensions, and the extensions are slidably connected to the fixed frame through the guide slots. A gap is reserved between each extension, and the gaps reserved on the extensions correspond to the positions of the fixed rod assembly.

[0016] Preferably, both sides of the push frame are fixedly connected to an extension push rod, and the end of the extension push rod away from the push frame is fixedly connected to a connecting rod. The side of the fixed plate away from the heat exchange plate assembly is fixed with a limit fixing rod. The end of the connecting rod away from the extension push rod is inserted into the limit fixing rod, and the end of the connecting rod away from the extension push rod is threadedly connected to a second limit nut.

[0017] Preferably, the buffer assembly includes a buffer shell and a control valve. One end of the buffer shell is connected to the liquid inlet pipe assembly, and the other end of the buffer shell is connected to the control valve. The end of the control valve away from the buffer shell is connected to an external pipeline. A pressure sensor is installed on the buffer shell, and a buffer baffle is fixedly connected inside the buffer shell.

[0018] A method for using an automatically pressure-regulating, leak-proof plate heat exchanger, the steps of which are as follows:

[0019] Step 1: Both external hot and cold water enter the same heat exchange plate group through the inlet pipe group. Hot water enters the heat exchange tank through the first inlet pipe and then enters the heat exchange plate group, while cold water enters the heat exchange plate group directly through the second inlet pipe.

[0020] Step 2: After the hot water inside one set of heat exchange plates has undergone heat exchange, it is transported to another set of heat exchange plates through the cooperation of the bypass plate group and the movable plate to continue heat exchange.

[0021] Step 3: After heat exchange through two sets of heat exchange plates, both hot and cold water are discharged outward through the drain pipe group. The hot water after heat exchange enters the interior of heat exchange tank 2 and then enters the drain pipe group through the first drain pipe. The cold water after heat exchange directly enters the drain pipe group through the second drain pipe.

[0022] Step 4: Before the external hot water enters the heat exchange plate assembly through the inlet pipe group in Step 1, the water flow is depressurized by the buffer component to reduce the impact damage of the water flow on the heat exchange plate assembly.

[0023] This invention has at least the following beneficial effects:

[0024] 1. The present invention, through the structural design of fixed plate, heat exchange plate group, movable plate and detour plate group, enables the device to significantly reduce the overall length of the device while ensuring that the heat exchange stroke remains unchanged. The reduction in the overall length of the device increases the maintenance space or allows for installation in some special places with limited length space.

[0025] 2. Through the structural design of the top pressure component, the present invention enables the device to effectively ensure the fit between the fixed plate, heat exchange plate group, movable plate, and detour plate group, making the fixed plate, heat exchange plate group, movable plate, and detour plate group more stable and firm.

[0026] This invention, through the structural design of the buffer assembly, enables the device to prevent high-pressure water flow from impacting the interior of the fixed plate, heat exchange plate assembly, movable plate, and bypass plate assembly, thus preventing leakage problems in the fixed plate, heat exchange plate assembly, movable plate, and bypass plate assembly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a side view of the overall structure of the present invention;

[0029] Figure 3This is a schematic diagram of the connection structure of the fixed plate, heat exchange plate assembly, movable plate, and fixed frame of the present invention.

[0030] Figure 4 This is a schematic diagram of the inner structure of the fixing plate of the present invention;

[0031] Figure 5 This is a schematic diagram of the heat exchange plate assembly, the detour plate assembly, and the movable plate of the present invention.

[0032] Figure 6 This is a rear view of the structure of the heat exchange plate assembly, the detour plate assembly, and the movable plate of the present invention.

[0033] Figure 7 This is a schematic diagram of the top pressure assembly of the present invention;

[0034] Figure 8 This is a partial structural schematic diagram of the top pressure assembly of the present invention;

[0035] Figure 9 This is a schematic diagram of the pusher and extension of the present invention;

[0036] Figure 10 This is a schematic diagram of the limiting and fixing rod and the second limiting nut of the present invention;

[0037] Figure 11 This is a cross-sectional view of the buffer component of the present invention.

[0038] In the diagram: 1. Fixed plate; 2. Heat exchange plate assembly; 3. Movable plate; 4. Fixed frame; 5. Guide frame assembly; 6. Fixed rod assembly; 7. First limit nut; 71. First liquid inlet pipe; 72. Second liquid inlet pipe; 8. First bypass heat exchange plate; 817. Liquid outlet one; 818. Liquid outlet two; 81. First drain pipe; 82. Second drain pipe; 9. Second bypass heat exchange plate; 918. Liquid outlet three; 10. Guide frame body one; 11. Guide frame body two; 12. Heat exchange tank one; 13. 14. Heat exchanger tank 2; 15. Heat exchanger tank 3; 16. Heat exchanger tank 4; 17. Heat exchanger tank 5; 18. Liquid inlet pipe assembly; 19. Liquid outlet pipe assembly; 20. Push frame; 21. Guide slide 1; 22. Guide slide 2; 23. Rotating rod; 24. Turntable; 25. Extension push rod; 26. Connecting rod; 27. Limiting and fixing rod; 28. Second limiting nut; 29. ​​Extension part; 30. Guide through groove; 31. Buffer shell; 32. Control valve; 33. Pressure sensor; 34. Buffer baffle. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example Example 1

[0040] Reference Figures 1-11 An automatically pressure-adjustable, leak-proof plate heat exchanger includes a fixed plate 1, a heat exchange plate assembly 2, a movable plate 3, a fixed frame 4, a fixed rod assembly 6, and a first limiting nut 7. The heat exchange plate assembly 2 and the movable plate 3 are located between the fixed plate 1 and the fixed frame 4. The four corners of the fixed plate 1 and the fixed frame 4 are connected by the fixed rod assembly 6. The fixed plate 1 and the fixed frame 4 are fixedly connected to the fixed rod assembly 6. The movable plate 3 is slidably connected to the fixed rod assembly 6. The first limiting nut 7 is threadedly connected to the fixed rod assembly 6 at the position between the movable plate 3 and the fixed frame 4. When the fixed plate 1, the heat exchange plate assembly 2, and the movable plate 3 are in contact, they are limited by the first limiting nut 7. The end of the fixed rod assembly 6 away from the fixed plate 1 is connected to each other in an X shape.

[0041] It can be seen that both external hot and cold water exchange heat through the heat exchange plate assembly 2. The heat exchange plate assembly 2 is squeezed by the movable plate 3 and the movement of the movable plate 3 is limited by the first limiting nut 7, so that the fixed plate 1, the heat exchange plate assembly 2, and the movable plate 3 are kept in contact. After rotating the first limiting nut 7 to release the movement limitation of the movable plate 3, the squeezing of the heat exchange plate assembly 2 can be released by sliding the movable plate 3, so that the heat exchange plate assembly 2 can be replaced.

[0042] Furthermore, heat exchange tank 12 and heat exchange tank 23 are respectively provided on the side of the fixed plate 1 near the heat exchange plate group 2. The heat exchange plate group 2 is set into two groups, which are symmetrically arranged. The two groups of heat exchange plate groups 2 correspond to the positions of heat exchange tank 12 and heat exchange tank 23 respectively. The liquid inlet pipe group 17 corresponds to the position of one of the heat exchange plate groups 2, and the liquid outlet pipe group 18 corresponds to the position of the other heat exchange plate group 2. The liquid inlet pipe group 17 includes a first liquid inlet pipe 71 and a second liquid inlet pipe 72. The first liquid inlet pipe 71 is connected to heat exchange tank 12, and the second liquid inlet pipe 72 is directly connected to the corresponding heat exchange plate group 2. The liquid outlet pipe group 18 includes a first liquid outlet pipe 81 and a second liquid outlet pipe 82. The first liquid outlet pipe 81 is connected to heat exchange tank 23, and the second liquid outlet pipe 82 is directly connected to the corresponding heat exchange plate group 2. This allows hot and cold water used for heat exchange to alternately enter the interior of each heat exchange plate group 2 for heat exchange operations.

[0043] Furthermore, a bypass plate group is provided between the two sets of heat exchange plate groups 2 and the movable plate 3, which is used to introduce the heat exchange liquid in one set of heat exchange plate groups 2 into the other set of heat exchange plate groups 2 for continued heat exchange.

[0044] It can be seen that the overall length of the device can be effectively reduced by setting two sets of heat exchange plates 2 side by side, and the connection of the two sets of heat exchange plates 2 is achieved by the meandering plate group, thereby ensuring the heat exchange stroke.

[0045] Specifically, the detour plate assembly includes a first detour heat exchange plate 8 and a second detour heat exchange plate 9. The second detour heat exchange plate 9 is located between the first detour heat exchange plate 8 and the movable plate 3. The first detour heat exchange plate 8 has heat exchange grooves 3 and 14 on the side close to the heat exchange plate assembly 2 and at the corresponding positions of the two heat exchange plate assemblies 2. The first detour heat exchange plate 8 and the second detour heat exchange plate 9 have heat exchange grooves 4 and 15 on the side close to each other. The second detour heat exchange plate 9 has heat exchange grooves 5 and 16 on the side close to the movable plate 3. When the first detour heat exchange plate 8 and the second detour heat exchange plate 9 are in contact, the two heat exchange grooves 4 and 15 form a reflux cavity 1. When the second detour heat exchange plate 9 is in contact with the movable plate 3, the two heat exchange grooves 5 and 16 form a reflux cavity 2.

[0046] The first detour heat exchange plate 8 has a liquid outlet 2 818 on its side and at the upper and lower ends of the two heat exchange tanks 3 14. The first detour heat exchange plate 8 has a corresponding number of liquid outlets 1 817 near the liquid outlet 2 818. The second detour heat exchange plate 9 has liquid outlets 3 918 corresponding to the number and position of the liquid outlet 2 818. The two heat exchange tanks 3 14 on the first detour heat exchange plate 8 are connected to the return cavity 2 through the corresponding liquid outlets 2 818 and 3 918. The two heat exchange plate groups 2 are connected to the return cavity 1 through the corresponding liquid outlets 1 817.

[0047] It can be seen that the hot water inside one set of heat exchange plate group 2 can enter the heat exchange tank 14 on one side of the first bypass heat exchange plate 8 and enter the return cavity 2 through the corresponding liquid outlets 818 and 918. After entering the return cavity 2, the hot water is guided by the heat exchange tank 14 and the corresponding liquid outlets 818 and 918 on the other side of the first bypass heat exchange plate 8 and then enters the other set of heat exchange plate group 2 to continue heat exchange. The cold water for heat exchange in one set of heat exchange plate group 2 directly enters the return cavity 1 through the liquid outlet 817. After entering the return cavity 1, the cold water for heat exchange is guided by the liquid outlet 817 on the other side of the first bypass heat exchange plate 8 and then enters the other set of heat exchange plate group 2 to continue heat exchange. The hot water and cold water flowing in the return cavity 2 and the return cavity 1 continuously exchange heat through the second bypass heat exchange plate 9.

[0048] Furthermore, to guide the movement of the heat exchange plate assembly 2, the movable plate 3, and the detour plate assembly, guide frame assemblies 5 are fixedly connected to the upper and lower ends of the fixed plate 1 near the movable plate 3. The heat exchange plate assembly 2, the movable plate 3, and the detour plate assembly are all laterally inserted into the guide frame assembly 5. Specifically, the guide frame assembly 5 includes a first guide frame body 10 and a second guide frame body 11. The first guide frame body 10 is U-shaped, and the second guide frame body 11 is L-shaped. The upper and lower ends of the heat exchange plate assembly 2, the movable plate 3, and the detour plate assembly are provided with a first guide groove 20 and a second guide groove 21, respectively. The heat exchange plate assembly 2, the movable plate 3, and the detour plate assembly are all laterally inserted into the first guide frame body 10 and the second guide frame body 11 through the first guide groove 20 and the second guide groove 21 at the upper and lower ends, respectively.

[0049] It can be seen that the guide frame 10 supports the ends of the two heat exchange plate groups 2 that are close to each other, the guide frame 2 11 supports the ends of the two heat exchange plate groups 2 that are far from each other, the guide frame 10 supports the middle of the detour plate group, and the guide frame 2 11 supports the ends of the detour plate group.

[0050] Furthermore, a top pressure assembly is provided between the movable plate 3 and the fixed frame 4 to ensure the connection stability between the fixed plate 1 and the heat exchange plate group 2, and between the heat exchange plate group 2 and the movable plate 3; an inlet pipe group 17 and a drain pipe group 18 are respectively provided on the side of the fixed plate 1 away from the heat exchange plate group 2, and a buffer assembly is provided at the end of the inlet pipe group 17 away from the fixed plate 1; the buffer assembly reduces the pressure of the water flow and reduces the impact damage of the water flow to the heat exchange plate group 2.

[0051] Specifically, the top-pressing assembly includes a pusher 19, which is located between the movable plate 3 and the fixed frame 4. A rotating rod 22 is rotatably connected to the middle of the pusher 19. The rotating rod 22 is threadedly connected to the fixed frame 4 and rotatably connected to the fixed rod group 6. To facilitate the rotation of the rotating rod 22, a turntable 23 is fixedly connected to the end of the rotating rod 22 away from the pusher 19. The pusher 19 is X-shaped. An extension 28 is provided on the side of the pusher 19 near the fixed frame 4 and at each of the four corners. The fixed frame 4 has a guide groove 29 corresponding to the extension 28. The extension 28 is slidably connected to the fixed frame 4 through the guide groove 29. A gap is reserved between each extension 28. The gap reserved on the extension 28 corresponds to the position of the fixed rod group 6.

[0052] It can be seen that by rotating the rotating rod 22, the pusher 19 can be pushed to move towards the movable plate 3. The pusher 19 abuts against the movable plate 3 and pushes the movable plate 3 to move towards the heat exchange plate group 2. Thus, the movable plate 3 and the fixed plate 1 clamp the heat exchange plate group 2, thereby completing the fitting of the fixed plate 1, the heat exchange plate group 2, and the movable plate 3. After the fixed plate 1, the heat exchange plate group 2, and the movable plate 3 are fitted together, the first limit nut 7 is tightened to achieve the effect of double limit.

[0053] Both sides of the pusher 19 are fixedly connected with extension push rods 24, and the ends of the extension push rods 24 away from the pusher 19 are fixedly connected with connecting rods 25. The side of the fixed plate 1 away from the heat exchange plate group 2 is fixed with a limit fixing rod 26. The end of the connecting rod 25 away from the extension push rod 24 is inserted into the limit fixing rod 26. The end of the connecting rod 25 away from the extension push rod 24 is threaded with a second limit nut 27.

[0054] It can be seen that during the process of the pusher 19 pushing the movable plate 3 to achieve the fit of the fixed plate 1, the heat exchange plate group 2, and the movable plate 3, the connecting rod 25 passes through the limiting fixing rod 26, and the triple limiting effect is achieved by tightening the second limiting nut 27.

[0055] Specifically, the buffer assembly includes a buffer housing 30 and a control valve 31. One end of the buffer housing 30 is connected to the inlet pipe assembly 17, and the other end of the buffer housing 30 is connected to the control valve 31. The end of the control valve 31 away from the buffer housing 30 is connected to an external pipeline. A pressure sensor 32 is installed on the buffer housing 30, and a buffer baffle 33 is fixedly connected inside the buffer housing 30.

[0056] As can be seen, the flow rate of the external hot water source is controlled by the control valve 31, the external hot water is buffered by the buffer shell 30 and the buffer baffle 33 inside the control valve 31, and the water pressure inside the buffer shell 30 is monitored by the pressure sensor 32. When the water pressure inside the buffer shell 30 is higher than the preset value, the inflow of the external hot water source is reduced by the control valve 31. The control valve 31 and the pressure sensor 32 can be commercially available models. For those skilled in the art, the power supply and connection relationship of the control valve 31 and the pressure sensor 32 are conventional technical means, and their principles will not be described in detail here. Example 2

[0057] Based on the above embodiment 1, its usage method is disclosed:

[0058] Step 1: Both external hot water and cold water enter the same heat exchange plate group 2 through the liquid inlet pipe group 17. Hot water enters the heat exchange tank 12 through the first liquid inlet pipe 71 and then enters the heat exchange plate group 2. Cold water enters the heat exchange plate group 2 directly through the second liquid inlet pipe 72.

[0059] Step 2: After the hot water inside one set of heat exchange plate group 2 has undergone heat exchange, it is transported to another set of heat exchange plate group 2 through the cooperation of the detour plate group and the movable plate 3 to continue heat exchange.

[0060] Step 3: After heat exchange by two sets of heat exchange plate groups 2, both hot and cold water are discharged outward through the drain pipe group 18. The hot water after heat exchange enters the heat exchange tank 2 13 and then enters the drain pipe group 18 through the first drain pipe 81. The cold water after heat exchange directly enters the drain pipe group 18 through the second drain pipe 82.

[0061] Step 4: Before the external hot water enters the heat exchange plate group 2 through the liquid inlet pipe group 17 in the first step, the water flow is depressurized by the buffer component to reduce the impact damage of the water flow on the heat exchange plate group 2.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A leak-proof plate heat exchanger with automatic pressure adjustment, comprising a fixed plate, a heat exchange plate assembly, a movable plate, a fixed frame, a fixed rod assembly, and a first limiting nut, characterized in that, A top-pressure assembly is provided between the movable plate and the fixed frame to ensure the connection stability between the fixed plate and the heat exchange plate assembly, and between the heat exchange plate assembly and the movable plate. An inlet pipe assembly and a outlet pipe assembly are respectively provided on the side of the fixed plate away from the heat exchange plate assembly. A buffer assembly is provided at the end of the inlet pipe assembly away from the fixed plate. A heat exchange tank 1 and a heat exchange tank 2 are respectively opened on the side of the fixed plate close to the heat exchange plate assembly. Two sets of heat exchange plate assemblies are provided, symmetrically arranged, corresponding to the positions of heat exchange tank 1 and heat exchange tank 2 respectively. The inlet pipe assembly corresponds to the position of one set of heat exchange plate assemblies, and the outlet pipe assembly corresponds to the position of the other set of heat exchange plate assemblies. A detour plate group is provided between the two sets of heat exchange plate groups and the movable plate, which is used to introduce the heat exchange liquid in one set of heat exchange plate groups into the other set of heat exchange plate groups to continue heat exchange. The meandering plate assembly includes a first meandering heat exchange plate and a second meandering heat exchange plate. The second meandering heat exchange plate is located between the first meandering heat exchange plate and the movable plate. The first meandering heat exchange plate has heat exchange grooves 3 on the side close to the heat exchange plate assembly and at the position corresponding to the two heat exchange plate assemblies. The first meandering heat exchange plate and the second meandering heat exchange plate have heat exchange grooves 4 on the side close to each other. The second meandering heat exchange plate has heat exchange grooves 5 on the side close to the movable plate. When the first meandering heat exchange plate and the second meandering heat exchange plate are in contact, the two heat exchange grooves 4 form a reflux cavity 1. When the second meandering heat exchange plate is in contact with the movable plate, the two heat exchange grooves 5 form a reflux cavity 2. The first detour heat exchange plate has liquid outlet 2 on its side and at the upper and lower ends of the two heat exchange tanks 3. The first detour heat exchange plate has a corresponding number of liquid outlet 1 near the liquid outlet 2. The second detour heat exchange plate has liquid outlet 3 corresponding to the number and position of the liquid outlet 2. The two heat exchange tanks 3 on the first detour heat exchange plate are connected to the return cavity 2 through the corresponding liquid outlet 2 and liquid outlet 3. The two sets of heat exchange plates are connected to the return cavity 1 through the corresponding liquid outlet 1.

2. The leak-proof plate heat exchanger with automatic pressure adjustment according to claim 1, characterized in that, The liquid inlet pipe assembly includes a first liquid inlet pipe and a second liquid inlet pipe. The first liquid inlet pipe is connected to a heat exchange tank, and the second liquid inlet pipe is directly connected to the corresponding heat exchange plate assembly. The liquid outlet pipe assembly includes a first liquid outlet pipe and a second liquid outlet pipe. The first liquid outlet pipe is connected to a heat exchange tank, and the second liquid outlet pipe is directly connected to the corresponding heat exchange plate assembly.

3. The leak-proof plate heat exchanger with automatic pressure adjustment according to claim 2, characterized in that, The upper and lower ends of the fixed plate near the movable plate are both fixedly connected to guide frame assemblies. The heat exchange plate assembly, movable plate, and detour plate assembly are all laterally inserted into the guide frame assembly. The guide frame assembly includes a guide frame body one and a guide frame body two. The guide frame body one is U-shaped and the guide frame body two is L-shaped. The upper and lower ends of the heat exchange plate assembly, movable plate, and detour plate assembly are all provided with guide groove one and guide groove two. The heat exchange plate assembly, movable plate, and detour plate assembly are all laterally inserted into the guide frame body one and guide frame two through the guide groove one and guide groove two provided at the upper and lower ends, respectively.

4. The leak-proof plate heat exchanger with automatic pressure adjustment according to claim 2, characterized in that, The top-pressing assembly includes a pusher frame located between the movable plate and the fixed frame. A rotating rod is rotatably connected to the middle of the pusher frame, and the rotating rod is threadedly connected to the fixed frame. The rotating rod is also rotatably connected to the fixed rod assembly. The pusher frame is X-shaped, and extensions are provided on the side of the pusher frame closest to the fixed frame and at each of the four corner positions. The fixed frame has guide slots corresponding to the extensions, and the extensions are slidably connected to the fixed frame through the guide slots. A gap is reserved between each extension, and the gaps reserved on the extensions correspond to the positions of the fixed rod assembly.

5. A leak-proof plate heat exchanger with automatic pressure adjustment according to claim 4, characterized in that, Both sides of the pusher are fixedly connected to an extension push rod. The end of the extension push rod away from the pusher is fixedly connected to a connecting rod. The side of the fixed plate away from the heat exchange plate group is fixed with a limit fixing rod. The end of the connecting rod away from the extension push rod is inserted into the limit fixing rod. The end of the connecting rod away from the extension push rod is threadedly connected to a second limit nut.

6. A leak-proof plate heat exchanger with automatic pressure adjustment according to claim 2, characterized in that, The buffer assembly includes a buffer housing and a control valve. One end of the buffer housing is connected to the inlet pipe assembly, and the other end of the buffer housing is connected to the control valve. The end of the control valve away from the buffer housing is connected to an external pipeline. A pressure sensor is installed on the buffer housing, and a buffer baffle is fixedly connected inside the buffer housing.

7. The method of using an automatically pressure-adjustable leak-proof plate heat exchanger according to any one of claims 2-6, characterized in that, The steps are as follows: S1: Both external hot and cold water enter the same heat exchange plate group through the liquid inlet pipe group. Hot water enters the heat exchange tank one through the first liquid inlet pipe and then enters the heat exchange plate group. Cold water enters the heat exchange plate group directly through the second liquid inlet pipe. S2: After the hot water inside one set of heat exchange plates has undergone heat exchange, it is transported to another set of heat exchange plates through the cooperation of the detour plate group and the movable plate to continue heat exchange; S3: After heat exchange through two sets of heat exchange plates, both hot and cold water are discharged outward through the drain pipe group. The hot water after heat exchange enters the interior of heat exchange tank 2 and then enters the drain pipe group through the first drain pipe. The cold water after heat exchange directly enters the drain pipe group through the second drain pipe. S4: Before the external hot water enters the heat exchange plate assembly through the inlet pipe group in S1, the water flow is depressurized by the buffer component to reduce the impact damage of the water flow to the heat exchange plate assembly.

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