Energy-saving plate heat exchanger for boiler heat cycle and assembling method thereof

Abstract

This invention relates to the field of energy-saving heat exchanger technology, specifically to a plate heat exchanger for an energy-saving boiler heat cycle and its assembly method, comprising: a protective plate, and a support frame connected to the protective plate, with side plates slidably mounted on the support frame, and multiple overlapping heat exchange plates connected between the protective plate and the side plates; a rotating rod rotatably mounted on the side plates, with a movable plate slidably mounted on the rotating rod, and a rotation locking mechanism connected to the rotating rod provided on the protective plate; a triggering component disposed on the movable plate and connected to the rotating rod; and a bidirectional limiting component disposed on the side plates and connected to the movable plate, with a follow-up control mechanism also provided on the movable plate. When the movable plate moves, the position of the side plates can be locked in a stress-dispersed state through the cooperation of the triggering component and the rotation locking mechanism to ensure the safe use of the heat exchanger under high pressure.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat exchanger technology, specifically to an energy-saving plate heat exchanger for boiler heat circulation and its assembly method. Background Technology

[0002] In energy-saving boiler heat circulation systems, plate heat exchangers are the core equipment for heat transfer. Their working principle involves stacking and clamping multiple corrugated metal heat exchange plates between a fixed protective plate and a movable side plate, forming a channel for the alternating flow of two media, and exchanging heat through the plate walls.

[0003] As operating time increases, calcium and magnesium ions, suspended solids, and corrosion products in the circulating water will gradually deposit on the surface of the heat exchange plates to form scale. The thermal conductivity of scale is much lower than that of metal plates, which will significantly reduce heat exchange efficiency and increase energy consumption. At the same time, the scale layer will also reduce the cross-sectional area of ​​the flow channel and increase the flow resistance. In severe cases, it may cause channel blockage and affect the normal operation of the boiler heat circulation system. Therefore, the heat exchange plates of the plate heat exchanger need to be disassembled and cleaned regularly to restore their heat exchange performance.

[0004] In the prior art, the assembly and locking of plate heat exchangers usually adopts a bolt fastening structure, that is, multiple bolt holes are opened around the protective plate and side plate, and the heat exchange plates between them are pressed together by inserting long bolts and tightening nuts.

[0005] However, multi-bolt fastening can easily lead to inconsistent tightening torques among the bolts, resulting in uneven distribution of the clamping force between the protective plate and the side plate on the heat exchange plate. Areas with insufficient clamping force are prone to leakage, while areas with excessive clamping force may cause deformation or even damage to the heat exchange plate. Furthermore, the heat exchanger is subjected to internal medium pressure during operation, and the axial thrust generated by this pressure is mainly transmitted through the bolts. The stress is highly concentrated around the bolt holes, which can easily lead to bolt hole deformation, thread wear, or even bolt breakage. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving plate heat exchanger for boiler heat circulation and its assembly method, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A plate heat exchanger for an energy-saving boiler heat cycle includes:

[0009] A protective plate, and a support frame connected to the protective plate, with side plates slidably mounted on the support frame, and multiple overlapping heat exchange plates connected between the protective plate and the side plates;

[0010] Also includes:

[0011] A rotating rod is rotatably mounted on the side plate, and a movable plate is slidably mounted on the rotating rod. A rotation locking mechanism connected to the rotating rod is provided on the protective plate.

[0012] A triggering component is disposed on the movable plate and connected to the rotating rod. The movable plate can drive the rotating rod to rotate through the triggering component and lock the position of the side plate through the rotation locking mechanism.

[0013] A bidirectional limiting component is disposed on the side plate and connected to the movable plate. The movable plate is also provided with a follow-up control mechanism, which can operate when the movable plate moves and lock the position of the movable plate through the bidirectional limiting component.

[0014] As a further embodiment of the present invention: the rotary locking mechanism includes a support rod symmetrically connected to the protective plate, a plurality of limiting rings evenly distributed on the support rod, and a plurality of positioning rings evenly distributed on the rotating rod, wherein the positioning rings and the limiting rings are interlocked.

[0015] As a further embodiment of the present invention: a first conical surface is formed on the limiting ring, and a second conical surface is formed on the positioning ring, wherein the first conical surface and the second conical surface abut against each other.

[0016] As a further embodiment of the present invention: the triggering component includes a first spiral groove and a first straight groove formed on the outer circumference of the rotating rod, a movable sleeve slidably connected to the rotating rod is connected to the movable plate, a first limiting block slidably engaged with the first spiral groove and the first straight groove is connected to the inner wall of the movable sleeve, and a first spring is sleeved on the rotating rod, with the two ends of the first spring abutting against the side plate and the movable plate respectively.

[0017] As a further embodiment of the present invention: the bidirectional limiting component includes a limiting hole formed on the movable plate, a locking rod rotatably mounted on the side plate, and a first limiting plate and a second limiting plate connected to the locking rod that abut against the movable plate, wherein the first limiting plate and the limiting hole are in a through fit.

[0018] As a further embodiment of the present invention: the follow-up control mechanism includes a second straight groove and a second spiral groove formed on the outer circumferential wall of the locking rod, the locking rod is axially slidably connected to a sliding sleeve, and the inner wall of the sliding sleeve is connected to a second limiting block that slidably engages with the second straight groove and the second spiral groove;

[0019] It also includes a support assembly and an elastic assembly disposed on the movable plate and connected to the sliding sleeve.

[0020] As a further embodiment of the present invention: the support assembly includes guide posts connected to the movable plate and symmetrically distributed, and a fixing ring is connected to the guide post.

[0021] As a further embodiment of the present invention: the elastic component includes a connecting plate slidably mounted on the guide post, the connecting plate abutting against the fixing ring and connected to the sliding sleeve, and a second spring abutting against the connecting plate is sleeved on the guide post.

[0022] As a further embodiment of the present invention: symmetrically distributed positioning holes are formed on the side plate, and a positioning rod that is inserted into the positioning holes is connected to the protective plate.

[0023] An assembly method for a plate heat exchanger in an energy-saving boiler heat cycle includes the following steps:

[0024] Step 1: Overlap multiple heat exchange plates and place them against one side of the protective plate;

[0025] Step 2: Control the side plate to move towards the heat exchange plate and make contact with the heat exchange plate;

[0026] Step 3: Push the movable plate to move, and drive the rotating rod to rotate through the trigger component. The rotating rod locks the position of the side plate through the rotation locking mechanism.

[0027] Step 4: The movable plate will also drive the follow-up control mechanism to move, and the position of the movable plate will be locked by the two-way limit component.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention achieves rapid assembly and disassembly of heat exchange plates and uniform stress distribution through the coordinated operation of a rotary locking mechanism, a triggering component, and a bidirectional limiting component. During assembly, the movable plate is driven by the triggering component to rotate the rotating rod half a turn, so that the positioning ring is fully embedded in the gap between the limiting rings, thus locking the position of the side plate. If there are small gaps between the heat exchange plates, the second conical surface of the positioning ring will fit against the first conical surface of the limiting ring during the rotation process. Under the guidance and force amplification effect of the conical surface fit, the rotating positioning ring generates an axial thrust on the limiting ring, driving the side plate to continue moving towards the protective plate, further compressing the heat exchange plate stack, eliminating gaps, and ensuring the sealing reliability of the plate heat exchanger under high pressure conditions.

[0030] In the locked state, multiple positioning rings on the rotating rod and multiple limiting rings on the support rod alternately engage, forming multiple sets of surface-to-surface contact fits. When the heat exchanger is working, the axial thrust generated by the internal medium pressure is evenly distributed and transmitted to the protective plate and side plate through the contact surfaces of each positioning ring and limiting ring, avoiding the drawback of stress concentration around the bolt holes in traditional bolt structures.

[0031] The more heat exchange plates there are, the greater the working power and the higher the internal pressure. The number of fitting rings and limit rings also increases accordingly, providing more stress-dispersing contact surfaces and stronger structural stability, thus achieving the effect of greater pressure and more reliable locking. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0033] Figure 2 This is a structural schematic diagram from another angle of one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0034] Figure 3 This is a schematic diagram of the structure of the rotary locking mechanism, part of the triggering component, and the movable plate in one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0035] Figure 4 This is a top view of one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0036] Figure 5 This is a schematic diagram of the rotating locking mechanism and part of the triggering components in one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0037] Figure 6 This is a schematic diagram showing the connection relationship between the bidirectional limiting component, the follow-up control mechanism, and the movable plate in one embodiment of a plate heat exchanger for an energy-saving boiler heat circulation system.

[0038] Figure 7 This is a partial cross-sectional structural schematic diagram of a plate heat exchanger for an energy-saving boiler heat cycle in one embodiment.

[0039] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0040] Figure 9 This is a schematic diagram of the bidirectional limiting component and the follow-up control mechanism in one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0041] Figure 10 This is an exploded structural diagram of the bidirectional limiting component and the follow-up control mechanism in one embodiment of a plate heat exchanger for an energy-saving boiler heat cycle.

[0042] In the diagram: 1. Protective plate; 2. Support frame; 3. Side plate; 301. Positioning hole; 4. Water inlet hole; 5. Drain hole; 6. Heat exchange plate; 7. Positioning rod; 8. Support rod; 9. Limiting ring; 901. First conical surface; 10. Rotating rod; 1001. First spiral groove; 1002. First straight groove; 11. Positioning ring; 1101. Second conical surface; 12. Movable plate; 1201. Limiting hole; 13. Movable sleeve; 1301. First limiting block; 14. Locking rod; 1401. Second straight groove; 1402. Second spiral groove; 15. First limiting plate; 16. Second limiting plate; 17. Guide post; 1701. Fixing ring; 18. Connecting plate; 19. Sliding sleeve; 1901. Second limiting block; 20. First spring; 21. Second spring. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0045] Please see Figures 1-10 In this embodiment of the invention, a plate heat exchanger for an energy-saving boiler heat cycle includes:

[0046] The protective plate 1 and the support frame 2 connected to the protective plate 1, the side plate 3 is slidably installed on the support frame 2, and multiple overlapping heat exchange plates 6 are connected between the protective plate 1 and the side plate 3.

[0047] Also includes:

[0048] A rotating rod 10 is rotatably mounted on the side plate 3. A movable plate 12 is slidably mounted on the rotating rod 10. A rotating locking mechanism connected to the rotating rod 10 is provided on the protective plate 1.

[0049] A triggering component is disposed on the movable plate 12 and connected to the rotating rod 10. The movable plate 12 can drive the rotating rod 10 to rotate through the triggering component, and lock the position of the side plate 3 through the rotation locking mechanism.

[0050] A bidirectional limiting component is disposed on the side plate 3 and connected to the movable plate 12. The movable plate 12 is also provided with a follow-up control mechanism, which can operate when the movable plate 12 moves and lock the position of the movable plate 12 through the bidirectional limiting component.

[0051] The protective plate 1 has two water inlet holes 4 and two drain holes 5. After the heat exchange plate 6 is assembled, hot water and cold water enter through the water inlet holes 4 respectively, and heat exchange is completed in the heat exchange plate 6. The water is then discharged through the two drain holes 5.

[0052] Specifically, when plate heat exchangers are used in boiler heat circulation, scale will form between the heat exchange plates 6 as water continues to flow. As the amount of scale increases, it will inevitably hinder the normal flow of water, thus affecting heat exchange efficiency. To ensure quick disassembly and cleaning of the heat exchange plates 6, the control side plate 3 needs to be detachably connected to the heat exchange plates 6. During assembly, the heat exchange plates 6 and the protective plate 1 can be attached and stacked. After stacking, the control side plate 3 abuts against the heat exchange plates 6. Subsequently, the control movable plate 12 moves, and the trigger assembly drives the rotating rod 10 to rotate, thereby rotating... The rotary locking mechanism locks the side plate 3 in position. At the same time, the movable plate 12 drives the follow-up control mechanism to move, thereby locking the movable plate 12 in position bidirectionally through the bidirectional limit component. In this way, the assembly of the side plate 3 can be completed. When disassembly is required, simply control the follow-up control mechanism to move and release the position lock of the movable plate 12 through the bidirectional limit component. At this time, the trigger component automatically pushes the movable plate 12 to reset and controls the rotary locking mechanism to move through the rotating rod 10, thereby releasing the position lock of the side plate 3. In this way, the disassembly of the side plate 3 and the heat exchange plate 6 can be quickly achieved.

[0053] The side plate 3 has symmetrically distributed positioning holes 301, and the protective plate 1 is connected to a positioning rod 7 that is inserted into the positioning holes 301.

[0054] Please see Figures 1-5The rotating locking mechanism includes a support rod 8 symmetrically connected to the protective plate 1. A plurality of limiting rings 9 are connected to the support rod 8 at equal intervals. A plurality of positioning rings 11 are connected to the rotating rod 10 at equal intervals. The positioning rings 11 and the limiting rings 9 are interlocked. A first conical surface 901 is formed on the limiting ring 9, and a second conical surface 1101 is formed on the positioning ring 11. The first conical surface 901 and the second conical surface 1101 abut against each other.

[0055] Please see Figures 1-5 The triggering component includes a first spiral groove 1001 and a first straight groove 1002 formed on the outer circumference of the rotating rod 10. A movable sleeve 13 is connected to the movable plate 12 and is slidably connected to the rotating rod 10. A first limiting block 1301 is connected to the inner wall of the movable sleeve 13 and is slidably fitted with the first spiral groove 1001 and the first straight groove 1002. A first spring 20 is sleeved on the rotating rod 10. The two ends of the first spring 20 abut against the side plate 3 and the movable plate 12, respectively.

[0056] In detail, when plate heat exchangers are used in boiler heat circulation, they are subjected to high pressure. The higher the pressure, the thicker the heat exchange plate 6 needs to be. Similarly, the higher the power of the plate heat exchanger, the more heat exchange plates 6 are required. The size of the limiting ring 9 and the positioning ring 11 are similar, and their thickness is the same as that of the heat exchange plate 6. The distance between adjacent limiting rings 9 is the same as the thickness of the heat exchange plate 6, and the distance between adjacent positioning rings 11 is also the same as the thickness of the heat exchange plate 6.

[0057] In the initial state, the side plate 3 is located at the end of the stroke away from the protective plate 1, and the movable plate 12 is located at the end of the stroke away from the side plate 3. That is, the distance between the movable plate 12 and the side plate 3 is the largest. The elongation of the first spring 20 in its natural state is greater than the maximum distance between the movable plate 12 and the side plate 3. Therefore, the first spring 20 is in a pre-compressed state and always provides the movable plate 12 with a thrust away from the side plate 3. The movable plate 12 also controls the first limiting block 1301 to be located at the end of the stroke of the first spiral groove 1001 away from the first straight groove 1002 through the movable sleeve 13. Under the action of the first limiting block 1301 and the first spiral groove 1001, the positioning ring 11 and the limiting ring 9 are controlled to be in a staggered state by the rotating rod 10.

[0058] When the plate heat exchanger needs to be assembled, the heat exchange plate 6 can be controlled to fit with the protective plate 1, and the heat exchange plates 6 can be gradually stacked so that multiple heat exchange plates 6 overlap each other. After the heat exchange plates 6 are stacked, the side plate 3 is controlled to move towards the heat exchange plate 6 so that the positioning rod 7 is inserted into the positioning hole 301 to complete the initial positioning. When the side plate 3 abuts against the outermost heat exchange plate 6, the positioning ring 11 and the limiting ring 9 are in an axially intersecting state.

[0059] Subsequently, the movable plate 12 is manually pushed toward the side plate 3. The movable plate 12 slides along the axis of the rotating rod 10 and drives the movable sleeve 13 to move synchronously. When the movable sleeve 13 moves, it drives the first limiting block 1301 to slide along the first spiral groove 1001. Under the cooperation of the first limiting block 1301 and the first spiral groove 1001, the linear motion of the movable sleeve 13 is converted into the rotational motion of the rotating rod 10. The rotating rod 10 drives the positioning ring 11 to rotate synchronously.

[0060] If the side plate 3 is in close contact with the heat exchange plate 6 and the heat exchange plate 6 is fully compressed so that the heat exchange plates 6 are tightly fitted without gaps, then the positioning ring 11 can be screwed into the gap between the two limiting rings 9, and the two end faces of the positioning ring 11 are tightly fitted with the corresponding end faces of the limiting rings 9. When the first limiting block 1301 disengages from the first spiral groove 1001 and enters the first straight groove 1002, the rotating rod 10 rotates just half a turn, and the positioning ring 11 is completely embedded in the gap between the limiting rings 9, forming an axial lock and completing the locking of the position of the side plate 3.

[0061] If the side plate 3 does not completely press the heat exchange plate 6 after it comes into contact with the heat exchange plate 6, that is, there are small gaps between the multiple heat exchange plates 6, then during the rotation of the positioning ring 11, its second conical surface 1101 will fit with the first conical surface 901 of the limiting ring 9. Since the conical surface fit has an automatic centering and force amplification effect, the rotating positioning ring 11 generates an axial thrust on the limiting ring 9 through the conical surface contact. This thrust is transmitted to the side plate 3 through the rotating rod 10, driving the side plate 3 to continue to move slightly towards the protective plate 1, further compressing the heat exchange plate 6 and eliminating the gaps between the stacked plates. When the first limiting block 1301 enters the first straight groove 1002, the side plate 3 completes the final pressing action on the heat exchange plate 6, and at the same time, the positioning ring 11 is completely embedded between the limiting rings 9.

[0062] In this way, through the cooperation of the positioning ring 11 and the limiting ring 9, the assembly gap between the heat exchange plates 6 can be automatically detected and compensated during the assembly process, avoiding leakage problems caused by the incomplete pressing of the stacked plates, and ensuring the sealing reliability of the plate heat exchanger under high pressure conditions.

[0063] When the positioning ring 11 and the limiting ring 9 are fully engaged, multiple sets of surface-to-surface contact fits are formed between them. When the plate heat exchanger is subjected to internal high pressure during operation, the axial thrust generated by the pressure is evenly distributed to the protective plate 1 and the side plate 3 through multiple contact surfaces of the positioning ring 11 and the limiting ring 9, avoiding stress concentration and significantly improving the pressure resistance and structural safety of the heat exchanger.

[0064] If there are more heat exchange plates 6, it means that the plate heat exchanger has a higher working power and higher internal pressure. At this time, the distance between the rotating rod 10 and the protective plate 1 increases accordingly, and the number of positioning rings 11 and limiting rings 9 that are interlocked also increases simultaneously, thereby providing more stress-dispersing contact surfaces and further enhancing the structural stability under high pressure conditions.

[0065] Please see Figure 4 , Figures 6-10 The bidirectional limiting component includes a limiting hole 1201 formed on the movable plate 12, and a locking rod 14 is rotatably mounted on the side plate 3. A first limiting plate 15 and a second limiting plate 16 that abut against the movable plate 12 are connected to the locking rod 14. The first limiting plate 15 is in through-fit with the limiting hole 1201.

[0066] Please see Figure 4 , Figures 6-10 The follow-up control mechanism includes a second straight groove 1401 and a second spiral groove 1402 formed on the outer circumference of the locking rod 14. The locking rod 14 is axially slidably connected to a sliding sleeve 19. The inner wall of the sliding sleeve 19 is connected to a second limiting block 1901 that slidably engages with the second straight groove 1401 and the second spiral groove 1402. The mechanism also includes a support assembly and an elastic assembly disposed on the movable plate 12 and connected to the sliding sleeve 19. The support assembly includes guide posts 17 connected to the movable plate 12 and symmetrically distributed. A fixing ring 1701 is connected to the guide post 17. The elastic assembly includes a connecting plate 18 slidably mounted on the guide post 17. The connecting plate 18 abuts against the fixing ring 1701 and is connected to the sliding sleeve 19. A second spring 21 is sleeved on the guide post 17 and abuts against the connecting plate 18.

[0067] Furthermore, when the positioning ring 11 and the limiting ring 9 are engaged with each other, the stress is mainly distributed on the contact surface between the two. In this state, the rotating rod 10 is not subjected to rotational force in the circumferential direction. Therefore, it is only necessary to lock the position of the movable plate 12.

[0068] In the initial state, the side plate 3 and the heat exchange plate 6 are separated. At this time, the distance between the movable plate 12 and the side plate 3 is the largest. The movable plate 12 controls the fixed ring 1701 and the connecting plate 18 to be in abutting state through the guide post 17. That is, the distance between the connecting plate 18 and the movable plate 12 is the largest. The elongation of the second spring 21 in its natural state is greater than the maximum distance between the connecting plate 18 and the movable plate 12. Therefore, the second spring 21 is in a pre-compressed state and always provides the connecting plate 18 with a thrust in the direction away from the movable plate 12. Under the action of the connecting plate 18, the sliding sleeve 19 is located at the end of its stroke away from the side plate 3, so that the second limiting block 1901 is located at the end of its stroke away from the second spiral groove 1401. Under the action of the second limiting block 1901 and the second straight groove 1401, the first limiting plate 15 and the limiting hole 1201 are in a through fit state, that is, the first limiting plate 15 can pass through the limiting hole 1201.

[0069] During assembly, the control side plate 3 moves toward the direction of the protective plate 1 and fits against the heat exchange plate 6. Then, the movable plate 12 is manually pushed toward the direction of the side plate 3. Under the action of the trigger component, the rotating rod 10 rotates, thereby controlling the positioning ring 11 and the limiting ring 9 to gradually engage. The movement of the movable plate 12 simultaneously drives the guide column 17 to move synchronously. The second spring 21 controls the connecting plate 18 to move synchronously with the guide column 17. The connecting plate 18 drives the second limiting block 1901 to slide along the second straight groove 1401 through the sliding sleeve 19, so that the angle of the locking rod 14 is kept locked. The first limiting plate 15 maintains the posture of penetrating and engaging with the limiting hole 1201.

[0070] When the first limiting block 1301 disengages from the first spiral groove 1001 and enters the first straight groove 1002, the positioning ring 11 and the limiting ring 9 are engaged with each other, and the side plate 3 is locked onto the protective plate 1. At this time, the second limiting block 1901 is located at the connection position between the second straight groove 1401 and the second spiral groove 1402. The first limiting plate 15 enters the limiting hole 1201. Under the cooperation of the first limiting plate 15 and the limiting hole 1201, the rotation angle of the locking rod 14 is restricted, and the second limiting block 1901 cannot enter the second spiral groove 1402. The positions of the sliding sleeve 19 and the connecting plate 18 are temporarily locked.

[0071] The movable plate 12 continues to move, the connecting plate 18 stops moving, the fixed ring 1701 separates from the connecting plate 18, the second spring 21 is further compressed and stores elastic potential energy. When the first limiting plate 15 completely passes through the limiting hole 1201, the angle restriction of the locking rod 14 is released. At this time, the second limiting plate 16 is just in contact with the side of the movable plate 12. The second spring 21 is released elastically, pushing the connecting plate 18 and the sliding sleeve 19 to move quickly toward the direction close to the fixed ring 1701, so that the second limiting block 1901 enters the second spiral groove 1402. Under the cooperation of the second limiting block 1901 and the second spiral groove 1402, the locking rod 14 rotates, causing the first limiting plate 15 and the second limiting plate 16 to deflect synchronously, so that both rotate to a state of misalignment with the limiting hole 1201. At this time, the first limiting plate 15 and the second limiting plate 16 are located on both sides of the movable plate 12, forming a bidirectional axial lock on the movable plate 12, making it unable to move axially.

[0072] When the heat exchange plate 6 needs to be disassembled and cleaned, simply push the connecting plate 18 in the opposite direction to move it a short distance away from the side plate 3. The sliding sleeve 19 will drive the second limiting block 1901 to slide in the opposite direction along the second spiral groove 1402 and enter the second straight groove 1401. The locking rod 14 will rotate in the opposite direction, causing the first limiting plate 15 to rotate again to the position directly opposite the limiting hole 1201, thus releasing the bidirectional locking of the movable plate 12. At this time, the first spring 20 will be released elastically, pushing the movable plate 12 to reset. The movable plate 12 will drive the first limiting block 1301 into the first spiral groove 1001 through the movable sleeve 13, driving the rotating rod 10 to rotate in the opposite direction, causing the positioning ring 11 to separate from the limiting ring 9, thus completing the automatic unlocking of the side plate 3.

[0073] An assembly method for a plate heat exchanger in an energy-saving boiler heat cycle includes the following steps:

[0074] Step 1: Overlap multiple heat exchange plates 6 and place them against one side of the protective plate 1;

[0075] Step 2: Control the side plate 3 to move toward the heat exchange plate 6 and abut against the heat exchange plate 6;

[0076] Step 3: Push the movable plate 12 to move, and drive the rotating rod 10 to rotate through the trigger component. The rotating rod 10 locks the position of the side plate 3 through the rotation locking mechanism.

[0077] Step 4: The movable plate 12 will also drive the follow-up control mechanism to move, and lock the position of the movable plate 12 through the bidirectional limit component.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plate heat exchanger for an energy-saving boiler heat circulation system, comprising: A protective plate, and a support frame connected to the protective plate, with side plates slidably mounted on the support frame, and multiple overlapping heat exchange plates connected between the protective plate and the side plates; Its characteristic is that it further includes: A rotating rod is rotatably mounted on the side plate, and a movable plate is slidably mounted on the rotating rod. A rotation locking mechanism connected to the rotating rod is provided on the protective plate. A triggering component is disposed on the movable plate and connected to the rotating rod. The movable plate can drive the rotating rod to rotate through the triggering component and lock the position of the side plate through the rotation locking mechanism. A bidirectional limiting component is disposed on the side plate and connected to the movable plate. The movable plate is also provided with a follow-up control mechanism, which can operate when the movable plate moves and lock the position of the movable plate through the bidirectional limiting component.

2. The plate heat exchanger for an energy-saving boiler heat circulation according to claim 1, characterized in that, The rotating locking mechanism includes a support rod symmetrically connected to the protective plate, a plurality of equidistant limiting rings connected to the support rod, and a plurality of equidistant positioning rings connected to the rotating rod, wherein the positioning rings and the limiting rings are interlocked.

3. The plate heat exchanger for an energy-saving boiler heat circulation according to claim 2, characterized in that, A first conical surface is formed on the limiting ring, and a second conical surface is formed on the positioning ring. The first conical surface and the second conical surface abut against each other.

4. The plate heat exchanger for an energy-saving boiler heat circulation according to claim 1, characterized in that, The triggering component includes a first spiral groove and a first straight groove formed on the outer circumference of the rotating rod. A movable sleeve that is slidably connected to the rotating rod is connected to the movable plate. A first limiting block that slidably engages with the first spiral groove and the first straight groove is connected to the inner wall of the movable sleeve. A first spring is sleeved on the rotating rod, and the two ends of the first spring abut against the side plate and the movable plate, respectively.

5. A plate heat exchanger for an energy-saving boiler heat circulation according to claim 1, characterized in that, The bidirectional limiting assembly includes a limiting hole formed on the movable plate, a locking rod rotatably mounted on the side plate, and a first limiting plate and a second limiting plate connected to the locking rod that abut against the movable plate. The first limiting plate is in through-fit with the limiting hole.

6. The plate heat exchanger for an energy-saving boiler heat circulation according to claim 5, characterized in that, The follow-up control mechanism includes a second straight groove and a second spiral groove formed on the outer circumference of the locking rod. The locking rod is axially slidably connected to a sliding sleeve. The inner wall of the sliding sleeve is connected to a second limiting block that slidably engages with the second straight groove and the second spiral groove. It also includes a support assembly and an elastic assembly disposed on the movable plate and connected to the sliding sleeve.

7. A plate heat exchanger for an energy-saving boiler heat circulation according to claim 6, characterized in that, The support assembly includes guide posts that are symmetrically distributed on the movable plate, and a fixing ring is connected to the guide post.

8. A plate heat exchanger for an energy-saving boiler heat circulation according to claim 7, characterized in that, The elastic component includes a connecting plate slidably mounted on the guide post, the connecting plate abutting against the fixing ring and connected to the sliding sleeve, and a second spring sleeved on the guide post abutting against the connecting plate.

9. A plate heat exchanger for an energy-saving boiler heat circulation according to claim 1, characterized in that, The side plate has symmetrically distributed positioning holes, and the protective plate is connected to a positioning rod that is inserted into the positioning holes.

10. A method for assembling a plate heat exchanger for an energy-saving boiler heat cycle, employing the plate heat exchanger for an energy-saving boiler heat cycle as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Overlap multiple heat exchange plates and place them against one side of the protective plate; Step 2: Control the side plate to move towards the heat exchange plate and make contact with the heat exchange plate; Step 3: Push the movable plate to move, and drive the rotating rod to rotate through the trigger component. The rotating rod locks the position of the side plate through the rotation locking mechanism. Step 4: The movable plate will also drive the follow-up control mechanism to move, and the position of the movable plate will be locked by the two-way limit component.

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