A plate heat exchanger facilitating disassembly and maintenance

Abstract

The present invention relates to the field of heat exchangers, and specifically to a plate heat exchanger that is convenient for disassembly and maintenance. It includes a plate heat exchanger body, which comprises a fixed end plate, a movable end plate, upper guide rods, lower guide rods, brackets, and plate sheets. The movable end plate and the fixed end plate are connected by a plurality of bolts. The right end of the upper guide rod is detachably connected to the bracket, and a section on the right side of the upper guide rod can be turned upwards to disconnect it from the bracket. The movable end plate includes two semi-movable end plates, and the two semi-movable end plates are rotatably connected and can be brought closer and folded in half. An annular groove is provided on the upper guide rod. A pressing mechanism is provided on the bracket to press against the two semi-movable end plates to make them closely adhere to the plate sheets. In the present invention, the disassembly and assembly of the plate sheets are very convenient. It is not necessary to tilt each sheet one by one for disassembly and assembly, and it is not necessary to unscrew a plurality of nuts during disassembly and assembly, nor is it necessary to remove the bolts, further saving operation time and thus improving the disassembly efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a plate heat exchanger which is easy to disassemble and repair. Background Art

[0002] Plate heat exchangers are highly efficient and compact heat exchange equipment, widely used in industries such as industry, HVAC, and food processing. During operation, hot and cold fluids pass through the narrow channels formed between the plates to exchange heat. Due to long-term operation, the plate heat exchanger will have varying degrees of dirt and sediment on the surface of the plates, which need to be cleaned irregularly. Blockages and damage may also occur, requiring disassembly and maintenance.

[0003] A Chinese patent with announcement number CN112146487B discloses a plate heat exchanger for a geothermal reinjection system that is easy to disassemble. By setting a heat exchanger assembly, a snap mechanism and a driving mechanism, the operating block is moved upward so that the movable rod drives the positioning plate to disengage from the restriction of the limit rod, and the limit rod can be pulled out of the placement groove. At the same time, the driving rod is rotated to pull the movable plate out of the clamping of the heat exchange plate body, which solves the problem that the cleaning of the heat exchange plate of a conventional heat exchanger requires the removal of multiple bolts in sequence, which is a time-consuming and labor-intensive process and affects the disassembly and cleaning efficiency of the heat exchange half plate.

[0004] However, the above-mentioned publicly available scheme has the following shortcomings: after the movable plate is moved and disassembled, the lateral size of the area where the plate is located can only be increased. If the plate needs to be removed for cleaning and maintenance, the plates need to be tilted one by one so that the plates can be disengaged from the upper and lower guide rods before they can be removed. The operation of removing the plates is relatively troublesome, and when reinstalling them, they also need to be inserted at an angle and then straightened one by one, which is also relatively cumbersome. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the installation and removal of plates in the background technology are relatively troublesome, and to provide a plate heat exchanger that is easy to disassemble and repair.

[0006] The technical solution of the present invention is as follows: a plate heat exchanger which is easy to disassemble and repair, comprising a plate heat exchanger body, the plate heat exchanger body comprising a fixed end plate, a movable end plate, an upper guide rod, a lower guide rod, a bracket and a plate; the movable end plate and the fixed end plate are connected by a plurality of bolts; the right end of the upper guide rod is detachably connected to the bracket, and a section of the right side of the upper guide rod can be flipped upward to disconnect it from the bracket, thereby leaving a gap for the plate to be directly taken out upward; the movable end plate comprises two semi-movable end plates, the two semi-movable end plates are rotatably connected and can be brought together and folded in half, an annular groove is provided on the upper guide rod, and after the two semi-movable end plates are brought together and folded in half, they move upward through the annular groove and then rotate 180 degrees around the axis of the upper guide rod to release the right side restriction of the plate; a tightening mechanism is provided on the bracket to hold the two semi-movable end plates against the plate.

[0007] Preferably, during disassembly, the two semi-mobile end plates flip and move closer to each other and move towards the bracket. Then, the mobile end plate enters the annular groove and moves upward so that the bottom of the mobile end plate disengages from the lower guide rod. Next, the mobile end plate is rotated 180 degrees around the axis of the upper guide rod. At this time, the mobile end plate is located above the upper guide rod. Then, the right section of the upper guide rod is folded upward. In this state, there is no restriction on the right side of the plate. The plate can be directly pushed to the right and then quickly taken out directly from the gap left after the right section of the upper guide rod is flipped and folded upward.

[0008] Preferably, the mobile end plate includes a sliding ring sleeved on the upper guide rod, a vertical rod vertically arranged at the bottom of the sliding ring, and a plurality of rotating connectors arranged on the vertical rod; the plurality of rotating connectors are alternately connected to the two semi-mobile end plates.

[0009] Preferably, the tightening mechanism includes a screw rod threadedly engaged with the bracket, and a hand wheel and a limiting plate arranged at both ends of the screw rod. The limiting plate abuts against the two semi-mobile end plates at the same time.

[0010] Preferably, a bolt slot for inserting a bolt is arranged on the side surface of the fixed end plate, and a limiting mechanism is arranged on the left side of the fixed end plate. The limiting mechanism can adjust the bolt to move horizontally along the axis direction.

[0011] Preferably, the limiting mechanism includes a U-shaped plate arranged at the left end of the bolt, mounting plates arranged at the two free ends of the U-shaped plate, and a manual clamping jaw arranged on the mounting plates; when the manual clamping jaw is in the locked state, its clamping member abuts against the fixed end plate to separate the mounting plate and the fixed end plate.

[0012] Preferably, the right end of the upper guide rod is horizontal and rotatably provided with a rotating shaft. A connecting block is arranged on the rotating shaft, and a movable column is arranged on the right side of the connecting block. A cylinder body is sleeved on the movable column and the upper guide rod. Threads that cooperate with each other are arranged on the outer peripheral surfaces of the movable column and the upper guide rod and the inner peripheral surface of the cylinder body.

[0013] Preferably, a U-shaped frame is arranged on the right end surface of the movable column. The opening on the U-shaped frame faces downward, and the top of the bracket is inserted into the opening of the U-shaped frame.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: when the movable column flips upward and the movable end plate rotates upward, there is no restriction on the right side of the plate. The plate can be directly pushed to the right and then quickly taken out directly from the gap left after the movable column is flipped and folded upward; during reinstallation, the plate is also directly placed into the gap and then pushed to the left. The disassembly and assembly of the plate are very convenient. It is not necessary to tilt each piece one by one for disassembly and assembly, which saves time and effort. Moreover, when disassembling and assembling, it is not necessary to unscrew a plurality of nuts, nor to remove the bolts, further saving the operation time, thereby improving the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1Schematic structural diagram of an embodiment of the present invention;

[0016] Figure 2 is Figure 1 axonometric view of;

[0017] Figure 3 is Figure 2 schematic structural diagram after removing the plate;

[0018] Figure 4 is Figure 3 schematic structural diagram after removing the cylinder;

[0019] Figure 5 is Figure 4 partial schematic structural diagram of;

[0020] Figure 6 is Figure 5 enlarged schematic view at A in;

[0021] Reference numerals: 1, fixed end plate; 2, movable end plate; 3, upper guide rod; 4, lower guide rod; 5, upper guide rod fixing plate; 6, lower guide rod fixing plate; 7, bracket; 8, bolt; 9, nut; 10, bolt slot; 11, plate; 12, communication port; 13, connecting screw; 14, U-shaped plate; 15, mounting plate; 16, manual jaw; 17, clamping member; 18, avoidance groove; 19, sliding ring; 20, vertical rod; 21, rotating connecting member; 22, semi-movable end plate; 23, screw; 24, handwheel; 25, limiting plate; 26, annular groove; 27, rotating shaft; 28, connecting block; 29, movable column; 30, cylinder; 31, pull ring; 32, U-shaped frame; 33, limiting bolt. Detailed implementation manners

[0022] Embodiment 1, as Figures 1-3As shown in the figure, a plate heat exchanger that is convenient for disassembly and maintenance proposed by the present invention includes a plate heat exchanger body. The plate heat exchanger body includes a fixed end plate 1, a movable end plate 2, upper guide rods 3, lower guide rods 4, a bracket 7, and plate sheets 11. Four communication ports 12 are provided on the fixed end plate 1. The communication ports 12 are used to connect external pipelines to realize the inlet and outlet of cold and hot water. A plurality of connecting screws 13 are provided around the communication ports 12 on the fixed end plate 1 for connecting with the flanges of external pipelines. The plate heat exchanger body is a prior art, that is, upper guide rods 3 and lower guide rods 4 are respectively arranged on the upper and lower sides of the fixed end plate 1. The upper guide rods 3 and the lower guide rods 4 are respectively connected to the fixed end plate 1 through an upper guide rod fixing plate 5 and a lower guide rod fixing plate 6. The movable end plate 2 is slidably matched with the upper guide rods 3 and the lower guide rods 4. A plurality of plate sheets 11 are arranged between the fixed end plate 1 and the movable end plate 2. The bracket 7 is used to connect the other ends of the upper guide rods 3 and the lower guide rods 4; the movable end plate 2 and the fixed end plate 1 are connected by a plurality of bolts 8; the right end of the upper guide rod 3 is detachably connected to the bracket 7. A section on the right side of the upper guide rod 3 can be turned upwards to disconnect it from the bracket 7, so as to leave a gap for the plate sheets 11 to be directly taken out upwards; the movable end plate 2 includes two semi-movable end plates 22. The two semi-movable end plates 22 are rotatably connected and can be folded together. An annular groove 26 is provided on the upper guide rod 3. After the two semi-movable end plates 22 are folded together and moved upwards through the annular groove 26, they are rotated 180 degrees around the axis of the upper guide rod 3 to release the restriction on the right side of the plate sheets 11; a tightening mechanism is provided on the bracket 7 to press against the two semi-movable end plates 22 to make them closely adhere to the plate sheets 11.

[0023] During disassembly, the two semi-movable end plates 22 are turned and folded together and moved towards the direction close to the bracket 7. Then, the movable end plate 2 enters the annular groove 26 and moves upwards so that the bottom of the movable end plate 2 is separated from the lower guide rod 4. Next, the movable end plate 2 is rotated 180 degrees around the axis of the upper guide rod 3. At this time, the movable end plate 2 is located above the upper guide rod 3. Then, a section on the right side of the upper guide rod 3 is turned upwards. In this state, there is no restriction on the right side of the plate sheets 11. The plate sheets 11 can be directly pushed to the right and then quickly taken out directly from the gap left after the section on the right side of the upper guide rod 3 is turned upwards and folded; during reinstallation, the plate sheets 11 are also directly placed into the gap and then pushed to the left. The disassembly and assembly of the plate sheets 11 are very convenient and do not require tilting one by one for disassembly and assembly, saving time and effort.

[0024] Embodiment 2, as Figures 2-3 shown, a plate heat exchanger that is convenient for disassembly and maintenance proposed by the present invention. Compared with Embodiment 1, the structure of the movable end plate 2 is introduced in detail in this embodiment.

[0025] The movable end plate 2 includes a slip ring 19 sleeved on the upper guide rod 3, a vertical rod 20 vertically arranged at the bottom of the slip ring 19, and a plurality of rotating connecting members 21 arranged on the vertical rod 20; the plurality of rotating connecting members 21 are alternately connected with the two semi-movable end plates 22, and the outer sides of the two movable end plates are provided with strip grooves for the insertion of bolts 8; nuts 9 are arranged on the bolts 8, and the nuts 9 are against the semi-movable end plates 22; after the semi-movable end plates 22 move a short distance to the right, the two semi-movable end plates 22 can move toward the right while shrinking, and when the slip ring 19 enters the annular groove, the entire movable end plate 2 can move upward for a distance so that its bottom is out of contact with the lower guide rod 4, and then the movable end plate 2 can be rotated upward as a whole, thereby exposing the space on the right side of the plate 11, and the plate 11 can directly move to the right as a whole; in order to facilitate the movement of the movable end plate 2 to the right, a pull ring 31 is arranged on the top of the vertical rod 20.

[0026] Embodiment three, as Figure 3 As shown, the present invention proposes a plate heat exchanger that is easy to disassemble and repair. Compared with the first embodiment, this embodiment introduces the structure of the tightening mechanism in detail.

[0027] In this embodiment, the tightening mechanism includes a screw rod 23 that is threadedly matched with the bracket 7, and a handwheel 24 and a limit plate 25 arranged at both ends of the screw rod 23, and the limit plate 25 is pressed against the two semi-movable end plates 22 at the same time; the limit plate 25 presses against the two semi-movable end plates 22, so that the two semi-movable end plates 22 cannot move to the right and thus rotate and move together. In an optional embodiment, the limit plate 25 is square or round, and the thread on the screw rod 23 is only present at the bracket 7, and the other positions are bare rods, which is convenient for rapid pulling to the right after rotating and moving a certain distance.

[0028] Embodiment 4, as Figure 5 and Figure 6 As shown, the present invention proposes a plate heat exchanger that is easy to disassemble and repair. Compared with the second embodiment, this embodiment introduces the limiting mechanism of the bolt 8 in detail.

[0029] A bolt slot 10 for inserting a bolt 8 is provided on the side surface of the fixed end plate 1. A limiting mechanism is provided on the left side of the fixed end plate 1, and the limiting mechanism can adjust the bolt 8 to move horizontally along the axis direction. The limiting mechanism includes a U-shaped plate 14 arranged at the left end of the bolt 8, mounting plates 15 arranged at the two free ends of the U-shaped plate 14, and manual grippers 16 arranged on the mounting plates 15; when the manual grippers 16 are in the locked state, their clamping members 17 abut against the fixed end plate 1 to separate the mounting plates 15 from the fixed end plate 1. An avoidance groove 18 for operating the manual grippers 16 is provided on the U-shaped plate 14. After the manual grippers 16 are loosened, the clamping members 17 move away from the fixed end plate 1 to the left. At this time, the U-shaped plate 14 and the bolt 8 can move to the right. After the bolt 8 moves to the right and is limited by the contact tightening mechanism, the two semi-mobile end plates 22 can move to the right and move closer inward, so that the semi-mobile end plates 22 are disengaged from the bolt 8 and the nut 9.

[0030] Embodiment 5, as Figures 3-4 shown, a plate heat exchanger that is convenient for disassembly and maintenance proposed by the present invention. Compared with Embodiment 4, the structure of the upper guide rod 3 is introduced in detail in this embodiment.

[0031] A rotating shaft 27 is horizontally and rotatably arranged at the right end of the upper guide rod 3. A connecting block 28 is arranged on the rotating shaft 27. An active column 29 is arranged on the right side of the connecting block 28. A cylinder 30 is sleeved on the active column 29 and the upper guide rod 3. Threads that cooperate with each other are arranged on the outer peripheral surfaces of the active column 29 and the upper guide rod 3 and the inner peripheral surface of the cylinder 30; when the cylinder 30 is sleeved on both the active column 29 and the upper guide rod 3 at the same time, the active column 29 and the upper guide rod 3 are coaxial. When the cylinder 30 rotates and moves onto the active column 29, the active column 29 can be turned upward, so as to leave a gap between the active column 29 and the bracket 7 for the plate 11 to be quickly taken out or inserted. In order to facilitate the rotation of the cylinder 30, two symmetrical handles are arranged on the outer wall of the cylinder 30. A U-shaped frame 32 is arranged on the right end surface of the active column 29. The opening on the U-shaped frame 32 faces downward. The top of the bracket 7 is inserted into the opening of the U-shaped frame 32. A threaded hole is arranged on the U-shaped frame 32. A blind hole opposite to the threaded hole is arranged on the bracket 7. The end of the limit bolt 33 is a smooth rod. The limit bolt 33 passes through the threaded hole and is inserted into the blind hole in cooperation, so that the U-shaped frame 32 is connected to the bracket 7. When disassembly is required, the active column 29 can be turned upward after loosening the limit bolt 33.

[0032] In summary, when the present invention needs to be disassembled, the locking state of the manual jaw 16 is released, the handwheel 24 is rotated to move the limit plate 25 into contact with the bracket 7, and then the movable end plate 2 is pulled to the right. The two semi-movable end plates 22 flip and move closer to the bracket 7, and the movable end plate 2 gradually disengages from the bolt 8 and the nut 9. Then, the movable end plate 2 moves upward into the annular groove 26 to disengage the bottom of the movable end plate 2 from the lower guide rod 4. Next, the movable end plate 2 is rotated 180 degrees around the axis of the upper guide rod 3. At this time, the movable end plate 2 is located above the upper guide rod 3. Then, the cylinder 30 is rotated and moved to the right, and then the movable column 29 is folded upward. In this state, there is no restriction on the right side of the plate 11, and the plate 11 can be directly pushed to the right and quickly taken out directly from the gap left after the movable column 29 is flipped and folded upward; when reinstalling, the plate 11 is also directly placed into the gap and then pushed to the left. The disassembly and assembly of the plate 11 are very convenient, without the need to tilt one by one for disassembly and assembly, saving time and effort. Moreover, when disassembling and assembling, it is not necessary to unscrew multiple nuts 9, let alone remove the bolt 8, further saving operation time and thus improving the disassembly efficiency.

[0033] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A plate heat exchanger that is easy to disassemble and repair, comprising a plate heat exchanger body, wherein the plate heat exchanger body comprises a fixed end plate (1), a movable end plate (2), an upper guide rod (3), a lower guide rod (4), a bracket (7) and a plate (11); characterized in that: The movable end plate (2) and the fixed end plate (1) are connected by a plurality of bolts (8); the right end of the upper guide rod (3) is detachably connected to the bracket (7); a right section of the upper guide rod (3) can be flipped upward to be disconnected from the bracket (7), thereby leaving a gap for the plate (11) to be directly taken out upward; the movable end plate (2) comprises two semi-movable end plates (22); the two semi-movable end plates (22) are rotatably connected and can be brought together and folded; an annular groove (26) is provided on the upper guide rod (3); after the two semi-movable end plates (22) are brought together and folded, they move upward through the annular groove (26) and then rotate 180 degrees around the axis of the upper guide rod (3) to release the restriction on the right side of the plate (11); a tightening mechanism is provided on the bracket (7) for pressing the two semi-movable end plates (22) to make them close to the plate (11).

2. The plate heat exchanger that is easy to disassemble and repair according to claim 1 is characterized in that: During disassembly, the two semi-movable end plates (22) are turned over and moved together in the direction close to the bracket (7), and then the movable end plate (2) enters the annular groove (26) and moves upward to make the bottom of the movable end plate (2) detach from the lower guide rod (4). Then, the movable end plate (2) is rotated 180 degrees around the axis of the upper guide rod (3). At this time, the movable end plate (2) is located above the upper guide rod (3), and then the right side of the upper guide rod (3) is folded upward. In this state, there is no restriction on the right side of the plate (11), and the plate (11) can be directly pushed to the right and then directly and quickly removed from the gap left after the right side of the upper guide rod (3) is turned up.

3. The plate heat exchanger that is easy to disassemble and repair according to claim 1 is characterized in that: The movable end plate (2) comprises a slip ring (19) sleeved on an upper guide rod (3), a vertical rod (20) vertically arranged at the bottom of the slip ring (19), and a plurality of rotating connecting members (21) arranged on the vertical rod (20); the plurality of rotating connecting members (21) are alternately connected to the two semi-movable end plates (22).

4. The plate heat exchanger that is easy to disassemble and repair according to claim 1 is characterized in that: The tightening mechanism comprises a screw rod (23) threadably matched with the bracket (7), and a hand wheel (24) and a limit plate (25) arranged at both ends of the screw rod (23), wherein the limit plate (25) is pressed against the two semi-movable end plates (22) at the same time.

5. The plate heat exchanger that is easy to disassemble and repair according to claim 1 is characterized in that: A bolt slot (10) for inserting a bolt (8) is provided on the side of the fixed end plate (1), and a limit mechanism is provided on the left side of the fixed end plate (1). The limit mechanism can adjust the bolt (8) to move horizontally along the axial direction.

6. The plate heat exchanger that is easy to disassemble and repair according to claim 5 is characterized in that: The limiting mechanism comprises a U-shaped plate (14) arranged at the left end of the bolt (8), a mounting plate (15) arranged at two free ends of the U-shaped plate (14), and a manual clamping claw (16) arranged on the mounting plate (15); when the manual clamping claw (16) is in a locked state, its clamping member (17) abuts against the fixed end plate (1) to separate the mounting plate (15) from the fixed end plate (1).

7. The plate heat exchanger that is easy to disassemble and repair according to claim 1 is characterized in that: A rotating shaft (27) is horizontally and rotatably arranged at the right end of the upper guide rod (3), a connecting block (28) is arranged on the rotating shaft (27), a movable column (29) is arranged on the right side of the connecting block (28), a cylinder (30) is sleeved on the movable column (29) and the upper guide rod (3), and threads that cooperate with each other are arranged on the outer circumferences of the movable column (29) and the upper guide rod (3) and the inner circumference of the cylinder (30).

8. The plate heat exchanger that is easy to disassemble and repair according to claim 7 is characterized in that: A U-shaped frame (32) is arranged on the right end surface of the movable column (29), the opening on the U-shaped frame (32) faces downward, and the top of the bracket (7) is inserted into the opening of the U-shaped frame (32).

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