Different-channel plate heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, in particular to a different-channel plate heat exchanger which comprises clamping plates, upper pipeline joints, guide rods, lower pipeline joints, clamping screws and supporting rods and further comprises heat exchange plate sets, limiting assemblies, drainage strip assemblies, check blocks and impeller assemblies. The multiple heat exchange plate sets comprise first heat exchange plates and second heat exchange plates, the first heat exchange plates and the second heat exchange plates are attached to each other, and arc-shaped grooves are formed in the different edge sides of the same faces of the first heat exchange plates and the second heat exchange plates. According to the plate heat exchanger, through the mode that after shutdown, the rotating strip moves downwards and deflects to the horizontal state, the cold cavity and the hot cavity are extruded in the process of continuing to move downwards to discharge residual media, the problem that in the northern area of China, temperature is lowered at night, the residual media in the plate heat exchanger are solidified and expanded to extrude a heat exchange plate, and sealing of the plate heat exchanger fails is solved; the service life of the plate heat exchanger is fully prolonged, and frequent maintenance is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, in particular to a different-channel plate heat exchanger. Background Art

[0002] Heat exchanger, also known as heat exchanger, is a device that transfers part of the heat of hot fluid to cold fluid. It plays an important role in many industrial production fields such as chemical, petroleum, power, food, etc. There are many types of heat exchangers. According to the structure, they can be divided into floating head heat exchanger, fixed tube sheet heat exchanger, U-shaped tube sheet heat exchanger, plate heat exchanger, etc. Among them, plate heat exchanger has a larger heat exchange area under the same volume compared with other types of heat exchangers, and can achieve more efficient heat exchange, so it is widely used.

[0003] In the chemical production process, there are two ways to prepare NaOH aqueous solution, namely, dissolving with solid sodium hydroxide and diluting with concentrated NaOH aqueous solution. When solid sodium hydroxide is dissolved in water, a large amount of heat will be released. In order to ensure the safety of the preparation process, the prepared NaOH aqueous solution and coolant are often passed into the plate heat exchanger respectively, and the coolant reduces the temperature of the NaOH aqueous solution through heat exchange to ensure the stability and safety of the NaOH aqueous solution production process. Since water has a high specific heat capacity and low cost, it can be directly discharged after the temperature rises after heat exchange, and there is no need to cool it down again for reuse. Therefore, water is often used as the coolant when cooling the NaOH aqueous solution.

[0004] There are many factories in northern my country that produce sodium hydroxide. In autumn and winter, the temperature difference between day and night in the north is large. Although the continuous heat release of sodium hydroxide during working hours can maintain the temperature of the plant within a certain range, the workshop lacking insulation function cools down quickly after production. The temperature of the workshop continues to drop at night, and the internal gap of the plate heat exchanger is narrow. After shutdown, the medium that loses pump pressure flows downward, but a negative pressure space is formed above the heat exchanger, resulting in a small amount of NaOH aqueous solution and water remaining at the bottom of the heat exchanger. The freezing point of 30% NaOH aqueous solution is +1.2℃, which is similar to the freezing point of water. Since the plate heat exchanger is mostly made of metal, it does not have a good thermal insulation effect. After the workshop temperature drops below zero at night, the NaOH aqueous solution and the water used as coolant will gradually solidify. In addition, the residual NaOH aqueous solution and water gather at the bottom of the heat exchanger. When the water solidifies, it expands, causing a small gap between the bottom of the heat exchanger plate due to the expansion of water. After a period of time, the sealing of the plate heat exchanger will be poor, requiring regular maintenance, and the cost of use is high.

[0005] To this end, a different-channel plate heat exchanger is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a different-channel plate heat exchanger, which uses the medium to push the rotating bar to rotate to a vertical state and simultaneously drives the rotating bar to move up to a high position when starting. After stopping, the rotating bar moves down and deflects from top to bottom to squeeze the cold and hot chambers to discharge the residual medium. This solves the problem that after the temperature drops at night in northern my country, the residual medium in the plate heat exchanger solidifies and expands to squeeze the heat exchange plates, causing the distance between the heat exchange plates to continue to expand, thereby causing the plate heat exchanger to be poorly sealed. The invention has the effect of greatly reducing the residual medium in the plate heat exchanger when stopping, avoiding the expansion of the heat exchange plates when more medium solidifies, and fully extending the service life of the plate heat exchanger without the need for frequent maintenance.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Sodium hydroxide (caustic soda) factories are distributed in many regions of my country, but observing the production data, according to the report released by Guanyan Report Network, from January to September 2024, Shandong Province accounted for 27.7% of my country's caustic soda production, with a cumulative output of 8.9363 million tons, ranking first in the country. During the same period, the caustic soda production of Inner Mongolia Autonomous Region was 2.7308 million tons, also occupying a large market share. It is not difficult to find that Shandong and Inner Mongolia Autonomous Region are both in northern my country. As we all know, the temperature in northern China is often below zero degrees Celsius in autumn and winter, especially at night. The workshops that produce NaOH aqueous solutions usually do not have additional insulation structures. When the temperature drops sharply at night, the residual NaOH aqueous solution in the plate heat exchanger and the water used as coolant solidify, and the water expands when solidifying, causing the bottom of the heat exchange plate to expand and be stretched open. Under normal circumstances, the thickness of the heat exchange plate is relatively thin, so it is very easy to stretch the bottom of the heat exchange plate, causing the seal of the plate heat exchanger to fail and require frequent maintenance. Although in the prior art, the heat exchange plates used in northern regions are mostly thickened to avoid frequent sealing failures of plate heat exchangers by improving the strength of the heat exchange plates, water freezes and freezes from the surface, and the internal water will still expand to both sides after freezing. Although the gap of the heat exchange plate is opened very small at a time, over time, the gap at the bottom of the plate heat exchanger will gradually increase. Although it can effectively extend the sealing period of the plate heat exchanger, it cannot effectively solve the problem.

[0009] A heterogeneous channel plate heat exchanger, comprising a clamping plate, an upper pipe joint, a guide rod, a lower pipe joint, a clamping screw, a support rod, and also comprising a heat exchange plate group, a limit assembly, a drainage strip assembly, a stopper and an impeller assembly, wherein a plurality of the heat exchange plate groups are installed side by side and in close contact between the clamping plates, the heat exchange plate group comprises a heat exchange plate 1 and a heat exchange plate 2, the heat exchange plate 1 and the heat exchange plate 2 are in close contact with each other, arc grooves are constructed on different edge sides of the same surface of the heat exchange plate 1 and the heat exchange plate 2, and heterogeneous channels are constructed on both sides of the heat exchange plate 1 and the heat exchange plate 2, the limit assembly The parts are fitted and installed in the arc groove, the drainage strip assembly is rotatably installed on the side wall of the limiting assembly, the block is fitted and installed in the special-shaped channel, the special-shaped channel is provided with a groove connected with the limiting assembly, the impeller assembly is installed in the groove, and the impeller assembly is transmission connected with the limiting assembly. When the medium flows into the special-shaped channel, it drives the impeller assembly to rotate and pushes the drainage strip assembly to deflect toward the limiting assembly side. At the same time, the impeller assembly drives the drainage strip assembly to move upward through the limiting assembly. When shut down, the drainage strip assembly moves downward under the action of its own gravity and returns to a horizontal state.

[0010] In the above scheme, the heat exchange cavity formed between heat exchange plate 1 and heat exchange plate 2 in the same heat exchange plate group is a cold water cavity, and the heat exchange cavity formed between heat exchange plate 1 and heat exchange plate 2 in adjacent heat exchange plate assemblies is a hot water cavity. The cold and hot chambers are alternately distributed, and the NaOH aqueous solution flows into the hot water cavity, and the medium as the coolant flows into the cold water cavity. When the medium flows into the corresponding cavity, the horizontal drainage bar assembly will be pushed up to the vertical state under the action of water pressure, and the stopper will be used to limit the rotation of the drainage bar assembly. When the corresponding medium flows to the corresponding outlet position, it will drive the impeller assembly to rotate. The impeller assembly rotates counterclockwise and transmits power to the limit assembly, thereby lifting the drainage bar assembly to the highest point through the limit assembly. After the production of NaOH aqueous solution is stopped and the equipment is closed, the corresponding medium that loses pressure flows downward. At this time, a small amount of medium located at a high position will also flow downward and drive the impeller assembly to rotate clockwise. However, the clockwise rotation of the impeller assembly will not transmit power to the limit assembly. Therefore, the drainage bar assembly will slowly move downward under the action of its own gravity, and deflect downward after losing the restriction of the block. When deflecting downward, it will squeeze the space below the cold and hot chambers, and the medium gathered at the bottom of the heat exchange plate group will move to the side of the downward pipe joint when the drainage bar assembly squeezes out the air, thereby discharging a large amount of the residual medium, thereby avoiding a large amount of medium from squeezing the bottom of heat exchange plate 1 and heat exchange plate 2 when solidifying as the temperature drops at night, causing the distance between heat exchange plate 1 and heat exchange plate 2 to gradually increase, fully ensuring the stability of the equipment during long-term use.

[0011] Preferably, the inlet and outlet of the special-shaped channel corresponding to the same medium are located at diagonal sides, and the inlet of different media are located at the bottom.

[0012] In the above scheme, since the inlets are all arranged at the bottom and the outlets are all arranged at the top, the heat exchange time of different media will be shortened. For this reason, the inlets and outlets of the same medium are arranged on the diagonal sides, so that different media form an X-shaped heat exchange surface during heat exchange, which effectively makes up for the heat exchange effect of this equipment. The special-shaped channel design can make the medium more evenly distributed inside the heat exchanger, which helps to reduce the dead zone and eddy current of the medium inside the heat exchanger, thereby improving the heat transfer efficiency of the fluid.

[0013] Preferably, the limiting assembly includes an arc frame, a sealing strip groove, a transmission tooth, a side groove and a rack. The arc frame is installed on the diagonal side of the arc groove on the heat exchange plate 1 and the heat exchange plate 2, and the arc frame and the arc groove are on the diagonal side. The sealing strip groove is opened on the arc frame, the transmission tooth is rotatably installed in the arc frame, the side groove is opened at the bottom of the arc frame close to the special-shaped channel side, and the rack is slidably arranged in the arc frame, and the rack is engaged with the transmission tooth.

[0014] In the above scheme, under the action of the limiting component, the thickness of the edge of the heat exchange plate group is effectively increased, and by forming a closed space on the upper side of the arc frame, it can not only improve the structural strength of the edge of the equipment and improve the deformation resistance, but also have a certain thermal insulation effect, thereby effectively preventing the residual medium from freezing and expanding when the temperature drops at night, thereby expanding the heat exchange plate 1 and the heat exchange plate 2.

[0015] Preferably, the drainage bar assembly includes a rotating bar, a connecting block and a supporting block, the connecting block and the supporting block are both installed on the side walls of the rack, the rotating bar is rotatably installed on the end of the connecting block, and the rotating bar overlaps the supporting block when it is in a horizontal state.

[0016] In the above scheme, when the medium flows from bottom to top, the rotating bar can be easily pushed to a vertical state, and the stopper can be used to limit the rotation of the rotating bar when it moves upward to prevent deflection. After the medium is stopped from entering, the rotating bar is in a downward movement state during the downward flow of the medium near the outlet, and deflection will only occur after the top of the rotating bar is separated from the stopper, thereby effectively preventing the downstream medium from gathering on the horizontal surface of the rotating bar.

[0017] Preferably, in a horizontal state, a cavity is provided inside the rotating bar with its center line being biased toward above the axis of the rotating bar, and the cavity is filled with flowing liquid.

[0018] In the above scheme, under the action of the cavity, when the rotating bar loses the limit of the block, the overall center of gravity of the rotating bar and the flowing liquid in the vertical state is biased away from the corresponding arc frame. Therefore, the rotating bar will inevitably deflect downward, and combined with its own gravity, it is ensured that the rotating bar can break through the air resistance and return to the horizontal state.

[0019] Preferably, the impeller assembly includes a side piece, a blade, a rotating rod, a limiting sleeve and a transmission belt. The rotating rod is rotatably installed in the groove, and the end of the rotating rod extends to the inner side of the arc frame. Two side pieces are installed in parallel at the end of the rotating rod. The blades are installed between the two blades in a circular array about the rotating rod. The limiting sleeve is rotatably installed on the inner wall of the arc frame and extends to the end of the rotating rod away from the blade. The transmission belt is connected between the limiting sleeve and a pulley coaxially arranged with the transmission tooth.

[0020] In the above scheme, when the medium flows to the corresponding outlet, the blades drive the rotating rod to rotate, and then the medium flow is used to provide power for the transmission component, so as to lift the rotating bar to a high position when the medium flows later.

[0021] Preferably, a sealing sheet is fitted on the inner wall of the arc-shaped frame, the rack passes through the sealing sheet, and the bottom of the sealing sheet is flush with the top of the side groove.

[0022] In the above scheme, under the action of the sealing sheet, the sealing above the arc frame is maintained as much as possible, thereby forming a heat insulation cavity. When the temperature drops at night, the heat exchange plate 1 and the heat exchange plate 2 can provide a certain heat insulation effect from both sides.

[0023] Preferably, the bottom of the stopper is arranged in an arc shape, and the bottom end of the stopper is arranged away from one side of the arc frame.

[0024] In the above scheme, under the action of the bottom opening of the block, when the rotating bar is not in a completely vertical state, it can also enter between the block and the corresponding arc frame, and make the rotating bar in a vertical state during the subsequent upward movement, thereby avoiding the inclined rotating bar from interfering with the smooth flow of the medium in the cold and hot chambers, thereby ensuring the heat exchange efficiency of the equipment.

[0025] Preferably, a movable groove is opened on the outer periphery of the rotating rod, and a limiting plate is slidably arranged in the movable groove, a micro spring is connected between the limiting plate and the rotating rod, the side wall of the limiting plate is connected to the movable rod, and the inner periphery of the limiting sleeve is constructed with a plurality of docking grooves adapted to the ends of the movable rod.

[0026] In the above scheme, the cross-section of the docking groove is close to a right-angled trapezoid, wherein the hypotenuse is located in front of the clockwise rotation direction of the limit sleeve. When the medium flows out to the outflow outlet, the blades and the rotating rod are driven to rotate counterclockwise. When the moving groove coincides with the docking groove, the moving rod contacts the straight side of the docking groove, thereby causing the limit sleeve to rotate with the rotating rod. At this time, the outflow of the medium is used to provide power for the transmission teeth; when the medium falls from the outflow outlet after losing the pressure, the blades and the rotating rod rotate clockwise under the action of the downstream medium, and the extended end of the moving rod contacts the hypotenuse of the docking groove. The moving rod continuously enters the docking groove and quickly withdraws from the docking groove, so that the limit sleeve will not rotate quickly with the rotating rod, thereby avoiding the limit sleeve rotating with the rotating rod and causing the rotating bar to drop rapidly, leaving sufficient time for the medium to flow down to a lower place.

[0027] Preferably, both ends of the rotating bar are constructed as a quarter arc, and the length of the upper surface of the rotating bar is greater than the length of the lower surface. A rubber sheet is bonded to one end of the rotating bar close to the connecting block, and the surface of the supporting block is constructed with an arc surface that matches the end of the rotating bar.

[0028] In the above scheme, by setting the length values ​​of the upper and lower surfaces and the shape of the end of the rotating bar, the rotating bar can be smoothly rotated to a horizontal state. Under the action of the arc groove constructed on the surface of the support block, the initial rotating bar will not be disturbed by the support block when rotating under the action of the flowing medium.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention sets the medium inlet at the bottom, and when the medium flows from bottom to top, the rotating bar is pushed to a vertical state, and when the medium flows to the outlet, the impeller assembly is driven to rotate to provide power input for the limit assembly, and the rotating bar is moved up to a high position, which can avoid the adverse interference of the setting of the rotating bar on the medium flow as much as possible. Moreover, after the preparation of the NaOH aqueous solution is stopped, the rotating bar slowly moves downward under the action of its own gravity, and deflects downward to squeeze the space below the cold and hot chambers after losing the restriction of the block, and the medium gathered at the bottom of the heat exchange plate group moves to the inlet side together with the air, thereby greatly discharging the residual medium, avoiding a large amount of medium from squeezing the bottom of the heat exchange plate 1 and the heat exchange plate 2 when solidifying as the temperature drops at night, causing the distance between the heat exchange plate 1 and the heat exchange plate 2 to gradually increase, fully ensuring the stability of the equipment during long-term use, and extending the sealing period of the equipment.

[0031] 2. Through the impeller assembly and limit assembly, when the corresponding medium flows to the corresponding outlet position, the impeller assembly will be driven to rotate and the power will be transmitted to the limit assembly. The limit assembly lifts the rotating bar to the highest point. After the production of NaOH aqueous solution is stopped and the equipment is closed, the corresponding medium that loses pressure will flow downward. At this time, a small amount of medium located at a high position will also flow downward and drive the impeller assembly to rotate clockwise. However, the clockwise rotation of the impeller assembly will not transmit power to the limit assembly, avoiding the rapid resetting of the rotating bar. During the slow downward movement of the rotating bar, the residual medium fully flows down to the inlet, thereby ensuring the extrusion effect of the rotating bar on the medium, which is beneficial to fully extend the sealing period of the equipment and reduce the use cost of the equipment.

[0032] 3. By setting the limit assembly, the thickness of the edge of the heat exchange plate group is increased, the structural strength and deformation resistance of the edge of the equipment are improved, and a closed space can be formed on the upper side of the arc frame, which has a certain thermal insulation effect, effectively preventing the residual medium from freezing and expanding when the temperature drops at night, thereby expanding the heat exchange plate 1 and the heat exchange plate 2, further extending the sealing period of the equipment and avoiding frequent maintenance and high use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the heat exchange plate group of the present invention;

[0035] Figure 3 It is a structural schematic diagram of a heat exchange plate 1 of the present invention;

[0036] Figure 4 It is a cross-sectional view of the limit assembly and the impeller assembly in the shutdown state of the present invention;

[0037] Figure 5 A cross-sectional view of the limit stop assembly in the start-up state of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the impeller assembly of the present invention;

[0039] Figure 7 It is a cross-sectional view of the rotating rod and the limiting sleeve of the present invention in corresponding states;

[0040] Figure 8 It is a cross-sectional view of the drainage strip assembly of the present invention.

[0041] In the figure: 1, clamping plate; 2, upper pipe joint; 3, guide rod; 4, lower pipe joint; 5, clamping screw; 6, heat exchange plate group; 61, heat exchange plate one; 62, heat exchange plate two; 63, arc groove; 64, special-shaped channel; 7, limit assembly; 71, arc frame; 72, sealing strip groove; 73, transmission gear; 74, sealing plate; 75, side groove; 76, rack; 8, support rod; 9, drainage strip assembly; 91, rotating strip; 92, connecting block; 93, supporting block; 911, cavity; 912, flowing liquid; 10, stopper; 11, impeller assembly; 111, side piece; 112, blade; 113, rotating rod; 1131, moving groove; 1132, moving rod; 1133, limit piece; 1134, micro spring; 114, limit sleeve; 1141, docking groove; 115, transmission belt. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 8 The present invention provides a different-channel plate heat exchanger, and the technical solution is as follows:

[0044] A different-channel plate heat exchanger, including a clamping plate 1, an upper pipe joint 2, a guide rod 3, a lower pipe joint 4, a clamping screw 5, and a support rod 8. The clamping plate 1 is composed of two pieces, one of which is fixed and the other is movable. The upper pipe joint 2 and the lower pipe joint 4 are both fixedly mounted on the side wall of the fixed clamping plate 1. The upper pipe joint 2 is an outlet corresponding to two media, and the lower pipe joint 4 is an inlet corresponding to two media. The guide rod 3 is installed through the two clamping plates 1, and the support rod 8 is installed between the two clamping plates 1. It also includes a heat exchange plate group 6, a limit assembly 7, a drainage strip assembly 9, a stopper 10 and an impeller assembly 11. The clamping screw 5 is installed between the two clamping plates 1, and the clamping screw 5 passes through multiple heat exchange plate groups 6, which are used to fix the heat exchange plates The group 6 is clamped and fixed, and multiple heat exchange plate groups 6 are installed side by side between the clamping plates 1. The heat exchange plate group 6 includes a heat exchange plate 1 61 and a heat exchange plate 2 62. The heat exchange plate 1 61 and the heat exchange plate 2 62 are fitted with each other. The heat exchange plate 1 61 and the heat exchange plate 2 62 between two adjacent groups of heat exchange plate groups 6 are adjacent to each other, that is, the heat exchange plate 1 61 and the heat exchange plate 2 62 between the clamping plates 1 always maintain a staggered distribution. The heat exchange plate 1 61 and the heat exchange plate 2 62 are constructed with arc grooves 63 on different edge sides of the same surface. There is only one arc groove 63 on a single heat exchange plate 1 61 and a single heat exchange plate 2 62. The thickness of the heat exchange plate 1 61 and the heat exchange plate 2 62 in the equipment is strengthened to ensure the opening of the arc groove 63, and both sides of the heat exchange plate 1 61 and the heat exchange plate 2 62 The structure is provided with a special-shaped channel 64. The special-shaped channels 64 on the adjacent sides of the heat exchange plate 1 61 and the heat exchange plate 2 62 are consistent in shape, and the special-shaped channels 64 on the opposite sides are consistent in shape. The special-shaped channels 64 on both sides of the same heat exchange plate 1 61 are symmetrically arranged. The adjacent side walls of the two clamping plates 1 are provided with special-shaped channels 64 adapted to the heat exchange plate 1 61 or the heat exchange plate 2 62 that fits the heat exchange plate 1 61 or the heat exchange plate 2 62. The limit assembly 7 is fitted in the arc groove 63, the drainage strip assembly 9 is rotatably installed on the side wall of the limit assembly 7, the stopper 10 is fitted in the special-shaped channel 64, and the special-shaped channel 64 is provided with a groove 12 connected to the limit assembly 7. The impeller assembly 11 is installed in the groove 12, and the impeller assembly 11 is transmission-connected with the limit assembly 7. Under the pumping action of the external equipment, The medium flow rate has a certain pressure and a relatively fast flow rate. When the medium flows into the special-shaped channel 64, it drives the impeller assembly 11 to rotate and pushes the drain bar assembly 9 to deflect toward the side of the limit assembly 7. At the same time, the impeller assembly 11 drives the drain bar assembly 9 to move upward through the limit assembly 7. When shut down, the drain bar assembly 9 moves downward under the action of its own gravity and returns to a horizontal state. Before the drain bar assembly 9 flips downward, it is in a slow downward movement process. At this time, the medium that loses the pumping effect flows down quickly and gathers at the inlet. The drain bar assembly 9 moves down to a height where the limit of the block 10 is lost, and then deflects downward. In the subsequent downward movement process, the space below the cold and hot chambers is correspondingly squeezed. When the drain bar assembly 9 squeezes out the air, the medium moves together to the side of the downward pipe joint 4, thereby discharging a large amount of residual medium.

[0045] As an embodiment of the present invention, refer to Figure 2 The inlet and outlet of the special-shaped channel 64 corresponding to the same medium are located at the diagonal side. If the inlets are all set at the bottom and the outlets are all set at the top, it will inevitably shorten the heat exchange time of different media. For this reason, by setting the inlet and outlet of the same medium at the diagonal side, when different media flow in the corresponding cold and hot chambers for heat exchange, an X-shaped heat exchange surface is formed, which effectively compensates for and improves the heat exchange effect of the equipment.

[0046] As an embodiment of the present invention, refer to Figure 3 , Figure 4 and Figure 5 The limiting assembly 7 includes an arc frame 71, a sealing strip groove 72, a transmission tooth 73, a side groove 75 and a rack 76. The arc frame 71 is installed on the diagonal side of the arc groove 63 on the heat exchange plate 1 61 and the heat exchange plate 2 62. The sealing strip groove 72 is provided on the arc frame 71. A sealing strip arranged along the sealing strip groove 72 and the edge of the special-shaped channel 64 is attached between the heat exchange plate 1 61 and the heat exchange plate 2 62. The transmission tooth 73 is rotatably installed in the arc frame 71, and the transmission tooth 73 is close to the middle position of the arc frame 71. The side groove 75 is provided on the arc frame 71. The frame 71 is close to the lower side of the special-shaped channel 64, and the height of the side groove 75 is less than half of the length of the arc frame 71. The rack 76 is slidably set in the arc frame 71, and the rack 76 is engaged with the transmission tooth 73. The side wall of the transmission tooth 73 is installed with a coaxial pulley, which drives the transmission tooth 73 to rotate when the pulley rotates. When the impeller assembly 11 drives the transmission tooth 73 to rotate, the rack 76 moves up under the action of the transmission tooth 73, thereby driving the drainage strip assembly 9 to move up, leaving enough time for the subsequent drainage strip assembly 9 to fall.

[0047] As an embodiment of the present invention, refer to Figure 4 and Figure 5 The drainage bar assembly 9 includes a rotating bar 91, a connecting block 92 and a supporting block 93. The connecting block 92 and the supporting block 93 are both mounted on the side wall of the rack 76, and the supporting block 93 is located below the connecting block 92. The rotating bar 91 is rotatably mounted on the end of the connecting block 92, and the rotating bar 91 overlaps the supporting block 93 when it is in a horizontal state. When the medium flows from bottom to top, the rotating bar 91 is pushed to a vertical state or a nearly vertical state by the medium. Under the action of the limiting assembly 7, the rotating bar 91 continues to move upward until it is inserted between the stopper 10 and the corresponding arc frame 71. See Figure 5, an arc-shaped bar having the same curvature as the end of the rotating bar 91 is fixed near one end of the rotating bar 91 close to the connecting block 92, and the width of the arc-shaped bar is much smaller than the width of the connecting block 92, and a curve corresponding to the arc-shaped bar is opened on the connecting block 92. When the rotating bar 91 is in a vertical state, the arc-shaped bar and the supporting block 93 are limited and fitted to avoid separation of the rotating bar 91 and the connecting block 92 connected by the semi-axis. At the same time, the connection method between the rotating bar 91 and the connecting block 92 can ensure the sealing effect of the rotating bar 91 close to the end of the arc frame 71, thereby effectively ensuring the extrusion effect of the medium when the rotating bar 91 moves horizontally downward.

[0048] As an embodiment of the present invention, refer to Figure 8 In the horizontal state, a cavity 911 is provided inside the rotating bar 91, and its center line is biased toward the upper side of the axis of the rotating bar 91. The cavity 911 is filled with a flowing liquid 912. The flowing liquid 912 does not completely fill the cavity 911, and the density of the flowing liquid 912 is much smaller than the density of the rotating bar 91 made of metal. After the rotating bar 91 slowly moves down to the top and separates from the stopper 10 due to its own gravity, the overall center of gravity of the rotating bar 91 and the flowing liquid 912 is biased toward the side of the rotating bar 91 axis away from the corresponding arc frame 71, and combined with its own gravity, it breaks through the air obstruction. Therefore, the rotating bar 91 deflects downward until it overlaps the surface of the support block 93, and when the rotating bar 91 tends to be horizontal, the flowing liquid 912 inside flows toward the end away from the corresponding arc frame 71, thereby helping to ensure that the end of the rotating bar 91 fits with the special-shaped channel 64 to form a sealed contact. Subsequently, as the rotating bar 91 continues to move vertically downward, it squeezes the lower portion. The cold and hot chambers push the downstream medium to the side of the lower pipe joint 4; both ends of the rotating bar 91 are constructed as a quarter arc, and the length of the upper surface of the rotating bar 91 is greater than the length of the lower surface. A rubber sheet is bonded to the end of the rotating bar 91 away from the arc frame 71, and the cross-section of the rubber sheet is also arc-shaped. When the rotating bar 91 rotates to a horizontal state, the rubber sheet is slightly deformed and fits with the special-shaped channel 64. The rotating bar 91 separates the chambers formed by the two special-shaped channels 64 and does not communicate with each other, ensuring that the end of the rotating bar 91 is sealed and fits with the inner edge of the special-shaped channel 64, thereby ensuring that the rotating bar 91 subsequently moves downward and squeezes out the residual medium through the air. The surface of the support block 93 is constructed with an arc surface adapted to the end of the rotating bar 91. During the rotation of the rotating bar 91, its end close to the connecting block 92 always maintains contact with the support block 93. When the initial rotating bar 91 is under the action of the flowing medium, it will not be disturbed by the support block 93 when it rotates.

[0049] As an embodiment of the present invention, refer to Figure 6The impeller assembly 11 includes a side piece 111, a blade 112, a rotating rod 113, a limiting sleeve 114 and a transmission belt 115. The rotating rod 113 is rotatably installed in the groove 12, and the end of the rotating rod 113 extends to the inner side of the arc frame 71. The two side pieces 111 are parallelly installed at the end of the rotating rod 113. The blades 112 are distributed in an annular array about the rotating rod 113 and are installed between the two blades 112. The limiting sleeve 114 is rotatably installed on the inner wall of the arc frame 71 and extends to the end of the rotating rod 113 away from the blade 112. The transmission belt 115 is connected between the limiting sleeve 114 and the pulley coaxially arranged with the transmission tooth 73. When the medium flows to the corresponding outflow port, the medium drives the blade 112 to rotate counterclockwise, and the blade 112 drives the rotating rod 113 to rotate accordingly, and the medium flow is used to provide power for the transmission assembly, so as to lift the rotating bar 91 to a high place during the continuous flow of the medium.

[0050] As an embodiment of the present invention, refer to Figure 5 A sealing sheet 74 is fitted on the inner wall of the arc frame 71, and a rack 76 passes through the sealing sheet 74. The bottom of the sealing sheet 74 is flush with the top of the side groove 75. The rotating rod 113 is connected to the heat exchange plate 1 61 and the heat exchange plate 2 62 through a sealing bearing (the sealing bearing is not shown in the figure) to prevent the medium from entering the upper space inside the arc frame 71 through the groove 12. Combined with the effect of the sealing sheet 74, a heat insulation cavity is formed above the arc frame 71 to provide heat insulation effect for the heat exchange plate 1 61 and the heat exchange plate 2 62.

[0051] As an embodiment of the present invention, refer to Figure 5 The bottom of the stopper 10 is set to be arc-shaped, and the bottom end of the stopper 10 is set away from the arc frame 71. When the rotating bar 91 is in a nearly vertical state due to insufficient medium pressure, it is guided by the bottom of the stopper 10 to smoothly enter between the stopper 10 and the corresponding arc frame 71. During the subsequent upward movement, the rotating bar 91 gradually tends to a vertical state, thereby preventing the rotating bar 91 from being in a tilted state and interfering with the smooth flow of the medium in the cold and hot chambers.

[0052] As an embodiment of the present invention, refer to Figure 7A moving groove 1131 is provided on the outer periphery of the rotating rod 113, and a limiting piece 1133 is slidably arranged in the moving groove 1131, a micro spring 1134 is connected between the limiting piece 1133 and the rotating rod 113, and a moving rod 1132 is connected to the side wall of the limiting piece 1133, and a plurality of docking grooves 1141 adapted to the end of the moving rod 1132 are constructed on the inner periphery of the limiting sleeve 114, and the cross section of the docking groove 1141 is close to a right-angled trapezoid, wherein the hypotenuse is located at the front side of the clockwise rotation direction of the limiting sleeve 114, when the medium flows out from the corresponding outflow port, it drives the blade 112 and the rotating rod 113 to rotate counterclockwise, and the micro spring 1134 pushes out the limiting piece 1133 and the moving rod 1132, and the moving rod 1132 moves outward along the moving groove 1131, and when the moving groove 1131 coincides with the docking groove 1141, the moving rod 113 2 contacts with the straight edge of the docking groove 1141, so that the limiting sleeve 114 rotates with the rotating rod 113, and the medium outflow is used to provide power for the transmission gear 73; when the medium falls from the outflow port after losing the pressure, the blade 112 and the rotating rod 113 rotate clockwise under the action of the downstream medium, and the moving rod 1132 has an outward movement tendency under the action of the micro spring 1134, and the extended end of the moving rod 1132 contacts with the oblique edge of the docking groove 1141, and then the moving rod 1132 continuously enters the docking groove 1141, and quickly squeezes the micro spring 1134 to withdraw from the docking groove 1141, so that the limiting sleeve 114 will not rotate quickly with the rotating rod 113, thereby preventing the limiting sleeve 114 from rotating with the rotating rod 113 and causing the rotating bar 91 to drop quickly, leaving sufficient time for the medium to flow down to a lower place.

[0053] Working process: When the pressurized medium flows into the corresponding cold and hot chambers, the drainage bar assembly 9 is pushed upward to flip to a vertical state. When the medium flows to the outlet, the medium pushes the impeller assembly 11 to rotate and provides power input for the limit assembly 7, driving the drainage bar assembly 9 to the highest point, so that there is sufficient time for the subsequent rotation bar 91 to move downward, ensuring that the medium gathers at the inlet and is located below the rotation bar 91. When the rotation bar 91 moves downward and separates from the stopper 10, it quickly flips downward to a horizontal state, and continues to squeeze the chamber downward during the downward movement, pushing the medium to the inlet of the lower pipe joint 4 to discharge it;

[0054] Specifically, the NaOH aqueous solution with a higher temperature and the water as a coolant with a lower temperature enter the corresponding hot and cold chambers from the two round holes of the lower pipe joint 4. When the medium flows from bottom to top, the rotating bar 91 is pushed to rotate upward around the connecting block 92, and the rotating bar 91 gradually tends to be vertical. When the medium flows to the outlet, the rotating rod 113 is driven to rotate counterclockwise by the action of the blade 112. Figure 7In a, by the cooperation between the moving rod 1132 and the straight edge of the docking groove 1141, the counterclockwise rotating rotating rod 113 is used to provide power input for the limiting assembly 7, the rotating rod 113 drives the limiting sleeve 114 to rotate, the limiting sleeve 114 drives the transmission tooth 73 to rotate through the connecting belt and the pulley, and finally the transmission tooth 73 is meshed with the rack 76 to move the rack 76 upward, and at the same time drive the rotating bar 91 to move upward to the highest point;

[0055] After the shutdown, the corresponding medium that loses pressure flows downward, and the medium located at a high position flows downward to drive the impeller assembly 11 to rotate clockwise. Figure 7 In b, the moving rod 1132 continuously enters the docking groove 1141 and exits from the docking groove 1141, so the clockwise rotation of the rotating rod 113 will not drive the limit sleeve 114 to rotate, and the rotating bar 91 slowly moves downward under the action of its own gravity. After the rotating bar 91 moves to the top and separates from the stopper 10, it quickly deflects downward to a horizontal state. In the process of the rotating bar 91 remaining horizontal and continuing to move downward to the lowest point, the rotating bar 91 corresponds to the space below the cold and hot chambers, and the medium pre-accumulated at the bottom of the heat exchange plate group 6 moves to the side of the downward pipe joint 4 when the rotating bar 91 moves downward to squeeze out the air, thereby discharging the residual medium, thereby avoiding a large amount of medium from squeezing the bottom of the heat exchange plate 1 61 and the heat exchange plate 2 62 when solidifying as the temperature drops at night, thereby preventing the distance between the heat exchange plate 1 61 and the heat exchange plate 2 62 from gradually increasing.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heterogeneous channel plate heat exchanger, comprising a clamping plate (1), an upper pipe joint (2), a guide rod (3), a lower pipe joint (4), a clamping screw (5), and a support rod (8), characterized in that: It also includes a heat exchange plate group (6), a limit assembly (7), a drainage strip assembly (9), a stopper (10) and an impeller assembly (11); a plurality of the heat exchange plate groups (6) are installed side by side and in close proximity between the clamping plates (1); the heat exchange plate group (6) includes a heat exchange plate 1 (61) and a heat exchange plate 2 (62); the heat exchange plate 1 (61) and the heat exchange plate 2 (62) are in close proximity with each other; arc grooves (63) are constructed on different edge sides of the same surface of the heat exchange plate 1 (61) and the heat exchange plate 2 (62); and special-shaped channels (64) are constructed on both sides of the heat exchange plate 1 (61) and the heat exchange plate 2 (62); the limit assembly (7) is installed in close proximity in the arc groove (63); the drainage strip assembly (9) is installed in close proximity in the arc groove (63); and the The impeller assembly (11) is installed in the groove (12), and the impeller assembly (11) is connected to the limit assembly (7). When the medium flows into the special-shaped channel (64), the impeller assembly (11) is driven to rotate and push the drainage strip assembly (9) to deflect to the limit assembly (7). At the same time, the impeller assembly (11) drives the drainage strip assembly (9) to move upward through the limit assembly (7). When the machine is stopped, the drainage strip assembly (9) moves downward under the action of its own gravity and returns to a horizontal state.

2. The different-channel plate heat exchanger according to claim 1, characterized in that: The inlet and outlet of the special-shaped channel (64) corresponding to the same medium are located at the diagonal side, and the inlet of different media are located at the bottom.

3. The different-channel plate heat exchanger according to claim 2, characterized in that: The limiting assembly (7) comprises an arc frame (71), a sealing strip groove (72), a transmission tooth (73), a side groove (75) and a rack (76); the arc frame (71) is mounted on the diagonal side of the arc groove (63) on the first heat exchange plate (61) and the second heat exchange plate (62), and the arc frame (71) and the arc groove (63) are located on the diagonal side; the sealing strip groove (72) is provided on the arc frame (71); the transmission tooth (73) is rotatably mounted in the arc frame (71); the side groove (75) is provided at the lower side of the arc frame (71) close to the special-shaped channel (64); the rack (76) is slidably arranged in the arc frame (71), and the rack (76) is meshed with the transmission tooth (73).

4. The different-channel plate heat exchanger according to claim 3, characterized in that: The drainage bar assembly (9) comprises a rotating bar (91), a connecting block (92) and a supporting block (93); the connecting block (92) and the supporting block (93) are both mounted on the side wall of the rack (76); the rotating bar (91) is rotatably mounted on the end of the connecting block (92), and the rotating bar (91) overlaps the supporting block (93) when in a horizontal state.

5. The different-channel plate heat exchanger according to claim 4, characterized in that: In a horizontal state, a cavity (911) is provided inside the rotating bar (91) with its center line deviating toward the axis of the rotating bar (91), and the cavity (911) is filled with flowing liquid (912).

6. The different-channel plate heat exchanger according to claim 3, characterized in that: The impeller assembly (11) comprises a side piece (111), blades (112), a rotating rod (113), a limiting sleeve (114) and a transmission belt (115); the rotating rod (113) is rotatably mounted in the groove (12), and the end of the rotating rod (113) extends to the inner side of the arc frame (71); two side pieces (111) are parallelly mounted on the end of the rotating rod (113); the blades (112) are distributed in an annular array with respect to the rotating rod (113) and are installed between the two blades (112); the limiting sleeve (114) is rotatably mounted on the inner wall of the arc frame (71) and extends to the end of the rotating rod (113) away from the blades (112); and the transmission belt (115) is connected between the limiting sleeve (114) and a pulley coaxially arranged with the transmission tooth (73).

7. The different-channel plate heat exchanger according to claim 6, characterized in that: A sealing sheet (74) is fitted on the inner wall of the arc-shaped frame (71), the rack (76) passes through the sealing sheet (74), and the bottom of the sealing sheet (74) is flush with the top of the side groove (75).

8. The different-channel plate heat exchanger according to claim 4, characterized in that: The bottom of the stopper (10) is arranged in an arc shape, and the bottom end of the stopper (10) is arranged away from one side of the arc frame (71).

9. The different-channel plate heat exchanger according to claim 6, characterized in that: The outer circumference of the rotating rod (113) is provided with a moving groove (1131), and a limiting plate (1133) is slidably arranged in the moving groove (1131), a micro spring (1134) is connected between the limiting plate (1133) and the rotating rod (113), the side wall of the limiting plate (1133) is connected to the moving rod (1132), and the inner circumference of the limiting sleeve (114) is constructed with a plurality of docking grooves (1141) adapted to the ends of the moving rod (1132).

10. The different-channel plate heat exchanger according to claim 5, characterized in that: Both ends of the rotating bar (91) are constructed in a quarter arc shape, and the length of the upper surface of the rotating bar (91) is greater than the length of the lower surface. A rubber sheet is bonded to one end of the rotating bar (91) away from the arc frame (71), and the surface of the supporting block (93) is constructed with an arc surface adapted to the end of the rotating bar (91).

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