CN115164621A

CN115164621A - Modularization gas-gas heat exchanger convenient to slab is changed

Info

Publication number: CN115164621A
Application number: CN202210709163.1A
Authority: CN
Inventors: 马挺; 於永; 周昌法; 吴舟; 沈萍
Original assignee: Yangzhong Shenyang Heat Exchange Equipment Co ltd
Current assignee: Yangzhong Shenyang Heat Exchange Equipment Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-10-11
Anticipated expiration: 2042-06-21
Also published as: CN115164621B

Abstract

The invention discloses a modularized gas-gas heat exchanger convenient for plate replacement, which comprises a base, a pressing plate and a bearing plate, wherein the pressing plate and the bearing plate are connected to the top of the base, a plurality of plates for heat exchange of two fluids are connected between the pressing plate and the bearing plate, the base is connected with a driving module for driving the pressing plate to move along the length direction of the base, a first air inlet pipe and a first air outlet pipe are connected with a closure module for closing off the fluids, the closure module comprises a closure box, a sealing baffle and a lifting plate which are oppositely arranged, the lifting plate is connected with a lifting module for driving the sealing baffle to lift, the lifting module comprises a jacking plate and a sliding block, a supporting seat is connected with a blasting module for blasting the first air inlet pipe and the second air inlet pipe, and the bottom of a moving plate is connected with a push-pull module for driving the sliding block to reciprocate. The invention enables the external air supply equipment to conveniently operate the plate sheet of the heat exchanger in a normal state, and has strong practicability.

Description

Modularization gas-gas heat exchanger convenient to slab is changed

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a modular gas-gas heat exchanger convenient for plate replacement.

Background

The heat exchanger is a device for transferring partial heat of hot fluid to cold fluid, also called as heat exchanger, and plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, and the heat exchanger can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical industry production, and has wide application. The gas-gas heat exchanger is one of heat exchangers and is mainly used for heat exchange work among gas media, the structure of the gas-gas heat exchanger is formed by overlapping multiple layers of materials with good heat conductivity, namely, the gas-gas heat exchanger is formed by pressing multiple layers of metal sheets with good heat conductivity into a concave surface, two pipeline loops are arranged in the heat exchanger, a pipeline on one side is introduced with a heat source, and a pipeline on the other side is heated.

The existing gas-gas heat exchanger needs to stop an external gas supply device when the plates are overhauled and disassembled, so that operation can be performed, most of smoke components on the basis of the gas-gas heat exchanger contain corrosive substances and toxic substances, and if the plates are directly disassembled and assembled, the corrosive substances and the toxic substances in gas can be directly diffused into surrounding air, so that serious injury is caused to the bodies of operating personnel.

Disclosure of Invention

The invention aims to provide a modularized gas-gas heat exchanger convenient for plate replacement, which has the advantages that an external gas supply device can conveniently operate the plates of the heat exchanger in a normal state, toxic gas can be discharged in time, a good environment is provided for workers to operate, the problem that the operation can be carried out only by stopping the external gas supply device is solved, most of smoke components on the basis of the gas-gas heat exchanger contain corrosive and toxic substances, and if the plates are directly disassembled and assembled, the corrosive and toxic substances in the gas can be directly emitted into the ambient air, so that the serious injury problem is caused to the bodies of operating personnel.

In order to achieve the purpose, the invention provides the following technical scheme: a modularized gas-gas heat exchanger convenient for plate replacement comprises a base, a pressing plate and a bearing plate, wherein the pressing plate and the bearing plate are connected to the top of the base, a plurality of plates for heat exchange of two fluids are connected between the pressing plate and the bearing plate, the base is connected with a driving module for driving the pressing plate to move along the length direction of the base, the driving module comprises a moving plate and a cylinder, the cylinder is used for driving the moving plate to move, the pressing plate is connected to the moving plate, the bearing plate is connected with a first air inlet pipe, a first air outlet pipe, a second air inlet pipe and a second air outlet pipe, the first air inlet pipe and the second air outlet pipe are connected with a closure module for closing fluids, the closure module comprises a closure box, a sealing baffle and a lifting plate which are arranged oppositely, the sealing baffle is connected to the closure box in a sliding mode, the lifting plate is connected to the sealing baffle, the lifting plate is connected to a lifting module for driving the sealing baffle to lift, the lifting module comprises a lifting plate and a sliding block, the sliding block is connected to a supporting seat arranged at one end of the base, two ends of the lifting plate are respectively connected to a sliding block and a sliding block for pushing and pulling and pushing the sliding block for controlling the moving module for moving the bottom of the moving plate;

when the movable plate moves to a first position, the pressing plate is attached to the plate, the sliding block moves to a position right below the lifting plate, the sealing baffle is plugged in the intercepting box, the point contact switch is turned on, and the air blower is turned on;

when the movable plate moves to the second position, the pressing plate is separated from the plate, the position of the sliding block is unchanged, the sealing baffle is plugged in the flow-off box, the point contact switch is opened, and the air blower is opened.

Preferably, the driving module further comprises a piston rod, the power output end of the cylinder is connected with the piston rod, one end of the piston rod is fixedly connected with the movable plate, and the cylinder is fixed on a fixing plate connected to the top of the base.

Preferably, the movable plate is connected to the top of the base in a sliding manner, the movable plate is connected with a guide column for guiding the movable plate, one end of the guide column is fixed to the bearing plate, the other end of the guide column penetrates through the pressing plate and the movable plate, and the guide column is used for limiting the plate.

Preferably, the guide column is provided with a plurality of locating grooves, the movable plate is connected with a locking head matched with the locating grooves, when the heat exchanger normally works, the locking head is connected with the corresponding locating groove, the movable plate and the pressing plate are both in a locating state, and a first spring for driving the movable plate and the pressing plate to be away from each other is connected between the movable plate and the pressing plate.

Preferably, the intercepting module further comprises a connecting plate and a pressing block, the pressing block is fixed at the top of the connecting plate, the connecting plate is connected to the lifting plate, the pressing block corresponds to the point contact switch, when the sealing baffle is plugged in the intercepting box, the pressing block presses the point contact switch, and the blower is turned on.

Preferably, the lifting module still includes spring three, spring post, the spring post is fixed in the rectangular hole that sets up in the supporting seat, sliding block sliding connection is in the rectangular hole, the spring three cover is at the spring post, and the spring three way is used for driving the sliding block and removes to the direction of keeping away from the base, the both ends of jacking plate are all articulated with sliding block, lifter plate respectively.

Preferably, the blowing module further comprises a gas transmission pipeline, a check valve II and a transverse pipe, two ends of the transverse pipe are respectively communicated with the gas inlet pipe I and the gas inlet pipe II, the check valve II is connected to the gas transmission pipeline, one end of the gas transmission pipeline is connected to the transverse pipe, the other end of the gas transmission pipeline is connected with an exhaust end of the blower, and the blower is fixed to the top of the supporting seat.

Preferably, the push-pull module comprises a driving rod, a guide seat, a second spring, a limiting seat, a limiting disc and a push-pull rod, wherein one end of the driving rod is fixedly connected with the bottom of the movable plate, the guide seat is used for guiding the driving rod, two ends of the second spring are respectively and fixedly connected with the driving rod and the push-pull rod, the limiting seat is used for guiding the push-pull rod, the limiting disc is fixed on the push-pull rod, one end of the push-pull rod is fixedly connected with the sliding block, and when the movable plate moves to the first position or the second position, the limiting disc presses the limiting seat.

Preferably, the guide seat and the limiting seat are fixed at the bottom of the base, the driving rod is connected to the guide seat in a sliding manner, the push-pull rod is connected to the limiting seat in a sliding manner, and the driving rod penetrates through the long round hole.

Preferably, the first exhaust pipe and the second exhaust pipe are both connected with a gas detector for gas detection, the top of the gas detector is connected with an alarm lamp, and the first exhaust pipe and the second exhaust pipe are both connected with a first check valve.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a gas pipeline maintenance device, which is provided with a cut-off module, a blowing module and a push-pull module, wherein the cut-off module comprises a cut-off box, a sealing baffle plate, a lifting plate, a connecting plate and a pressing block, the blowing module comprises a blower, a point contact switch, a gas pipeline, a one-way valve II and a transverse pipe, the push-pull module comprises a driving rod, a guide seat, a spring II, a limiting seat, a limiting disc and a push-pull rod, when a plate needs to be maintained or replaced, a cylinder drives the moving plate to move to a first position, the spring I becomes long, the pressing plate is pressed on the plate to avoid the plate from being loosened, the moving plate exerts pulling force on the driving rod, the driving rod pulls the push-pull rod to move forwards, namely, the limiting disc moves towards the limiting seat, the push-pull rod pulls the sliding block to move towards a direction close to a base, the lifting plate is pushed up by the pushing plate, namely, the pressing block and the sealing baffle plate synchronously moves upwards, when the limiting disc is connected to the limiting seat, the sealing baffle plate is inserted into the cut-off box to prevent fluid from entering the plate, meanwhile, the point contact switch is pressed to open the pressing block, the blower to work, the gas inlet pipe I and the gas pipeline is blown into the gas pipeline to provide a good maintenance environment for maintenance or the gas for maintenance; after toxic gas is exhausted, the cylinder drives the moving plate to move to the second position, namely the first spring pulls the pressing plate to be separated from the plates, and at the moment, the plates are in a loose state, so that external gas supply equipment can conveniently operate the plates of the heat exchanger in a normal state, and the practicability is high.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection structure of the push-pull module and the lifting module according to the present invention;

FIG. 3 is a partial view of FIG. 2;

FIG. 4 is a schematic view of a top structure of the support base of the present invention;

FIG. 5 is a partial view of FIG. 4;

FIG. 6 is a structural diagram illustrating a normal use state of the present invention;

FIG. 7 is a structural diagram illustrating the moving plate of the present invention moved to a position;

FIG. 8 is a partial view of FIG. 7;

FIG. 9 is a schematic diagram of the moving plate of the present invention moving to the second position.

In the figure: 1. a base; 2. a cylinder; 3. a fixing plate; 4. a piston rod; 5. positioning a groove; 7. moving the plate; 8. a compression plate; 9. a plate sheet; 10. a guide post; 11. a first spring; 12. a first exhaust pipe; 13. a second exhaust pipe; 14. an alarm light; 15. a gas detector; 16. a one-way valve I; 17. a flow-stopping box; 18. a reinforcing frame; 19. a second air inlet pipe; 20. a carrier plate; 23. a first air inlet pipe; 24. a transverse tube; 25. a blower; 26. sealing the baffle; 27. a rectangular hole; 28. a spring post; 29. a supporting seat; 30. a slider; 31. a locking head; 32. a long round hole; 33. a drive rod; 34. a guide seat; 35. a second spring; 36. a limiting seat; 37. a limiting disc; 38. a push-pull rod; 39. a second one-way valve; 40. a pressing block; 41. jacking up the plate; 42. a lifting plate; 43. a connecting plate; 44. a point contact switch; 46. a gas pipeline; 47. and a third spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 9, the present invention provides a modular gas-gas heat exchanger convenient for plate replacement, which includes a base 1, a pressing plate 8 and a bearing plate 20 connected to the top of the base 1, wherein a plurality of plates 9 for heat exchange between two fluids are connected between the pressing plate 8 and the bearing plate 20, and the plates 9 are made of metal and supported on the top of the base 1. The base 1 is connected with a driving module used for driving the pressing plate 8 to move along the length direction of the base 1, the driving module comprises a moving plate 7 and a cylinder 2, the cylinder 2 is used for driving the moving plate 7 to move, the pressing plate 8 is connected to the moving plate 7, the bearing plate 20 is connected with a first air inlet pipe 23, a first exhaust pipe 12, a second air inlet pipe 19 and a second exhaust pipe 13, a reinforcing frame 18 is fixed between the first air inlet pipe 23 and the second air inlet pipe 19, the reinforcing frame 18 is fixedly connected with the first exhaust pipe 12 and the second exhaust pipe 13, the first air inlet pipe 23, the first exhaust pipe 12, the second air inlet pipe 19 and the second exhaust pipe 13 can be guaranteed to be stably connected with each other, and meanwhile, the point contact switch 44 is connected to the reinforcing frame 18. The first air inlet pipe 23 and the first exhaust pipe 12 are connected with a closure module for fluid closure, the closure module comprises a closure box 17, a sealing baffle 26 and a lifting plate 42 which are oppositely arranged, the sealing baffle 26 is connected to the closure box 17 in a sealing and sliding mode, the sealing baffle 26 is stable in lifting, and gas leakage can be avoided when the sealing baffle 26 is inserted into the closure box 17. The lifting plate 42 is connected to the sealing baffle 26, and is fixedly connected to the sealing baffle 26, so that the lifting plate 42 is connected to the sealing baffle 26 stably, the lifting plate 42 is connected to a lifting module used for driving the sealing baffle 26 to lift, the lifting module comprises a jacking plate 41 and a sliding block 30, the sliding block 30 is connected to a supporting seat 29 arranged at one end of the base 1, and two ends of the jacking plate 41 are respectively connected to the sliding block 30 and the lifting plate 42. The supporting seat 29 is connected with an air blowing module used for blowing air in the air inlet pipe I23 and the air inlet pipe II 19, the air blowing module comprises an air blower 25 and a point contact switch 44 used for controlling the air blower 25 to be turned on or off, and when the pressing block 40 presses the point contact switch 44, the air blower 25 is turned on to work; when the pressing block 40 is separated from the point contact switch 44, the blower 25 is stopped, and the push-pull module for driving the sliding block 30 to reciprocate is connected to the bottom of the moving plate 7.

When the cylinder 2 drives the moving plate 7 to move to the first position, the spring one 11 is lengthened, the pressing plate 8 is pressed on the plate 9 at the moment, the plate 9 is prevented from being loosened, the moving plate 7 applies a pulling force on the driving rod 33, the driving rod 33 pulls the push-pull rod 38 to move forwards, namely the limiting disc 37 moves towards the limiting seat 36, the push-pull rod 38 pulls the sliding block 30 to move towards the direction close to the base 1, so that the jacking plate 41 jacks the lifting plate 42, namely the pressing block 40 and the sealing baffle 26 move upwards synchronously, when the limiting disc 37 is connected to the limiting seat 36, the sealing baffle 26 is inserted into the intercepting box 17 to block the intercepting box 17, so that fluid is prevented from entering the plate 9 for heat exchange, meanwhile, the pressing block 40 presses the point contact switch blower 44 to start the blower 25, the air inlet pipe 25 carries out air conveying on the first 23 and the second 19, the air inlet pipe flows into the plurality of plates 9, and internal toxic smoke can be blown out from the first exhaust pipe 12 and the second exhaust pipe 13, so as to provide a good operation environment for overhauling or installation of the subsequent plate 9.

When the cylinder 2 drives the moving plate 7 to move to the second position, namely the first spring 11 pulls the pressing plate 8 to separate from the plates 9, the plates 9 are in a loose state at the moment, so that external air supply equipment can conveniently operate the plates 9 of the heat exchanger in a normal state, meanwhile, the position of the sliding block 30 is unchanged, the sealing baffle 26 is blocked in the intercepting box 17, the point contact switch 44 is opened, and the air blower 25 is still in a working state.

The driving module further comprises a piston rod 4, the power output end of the air cylinder 2 is connected with the piston rod 4, one end of the piston rod 4 is fixedly connected with the moving plate 7, the air cylinder 2 is fixedly connected with the fixing plate 3 connected to the top of the base 1, and the fixing plate 3 supports the air cylinder 2, so that the stability of the air cylinder 2 is improved.

The movable plate 7 is connected to the top of the base 1 in a sliding mode, the movable plate 7 is connected with guide columns 10 used for guiding the movable plate 7, the guide columns 10 are four in number and are in a group, one end of each guide column 10 is fixed to the bearing plate 20, the other end of each guide column runs through the pressing plate 8 and the movable plate 7, the guide columns 10 are used for limiting the plate sheets 9, the guide columns 10 enable the movable plate 7 and the pressing plate 8 to move stably on the top of the base 1, and meanwhile the two ends of each plate sheet 9 are attached to the guide columns 10.

The guide column 10 is provided with a plurality of positioning grooves 5, the moving plate 7 is connected with a locking head 31 matched with the positioning grooves 5, the locking head 31 is in threaded connection with one side of the moving plate 7, when the heat exchanger works normally, the locking head 31 is connected with the corresponding positioning groove 5, namely, the moving plate 7 and the pressing plate 8 are in a positioning state; when the plate 9 needs to be disassembled and assembled, the locking head 31 is adjusted to be separated from the positioning groove 5, so that the movable plate 7 and the pressing plate 8 are in a movable state, a first spring 11 for driving the movable plate 7 and the pressing plate 8 to be away from each other is connected between the movable plate 7 and the pressing plate 8, at least four springs 11 are arranged, and two ends of each spring are fixedly connected with the movable plate 7 and the pressing plate 8 respectively.

The intercepting module further comprises a connecting plate 43 and a pressing block 40, wherein the pressing block 40 is fixed at the top of the connecting plate 43, the connecting plate 43 is connected to the lifting plate 42, and the pressing block 40 corresponds to the point contact switch 44.

The lifting module still includes spring three 47, spring post 28 is fixed in the rectangular hole 27 that sets up in supporting seat 29, sliding block 30 sliding connection is in rectangular hole 27, spring three 47 cover is at spring post 28, and spring three 47 is used for driving sliding block 30 to remove to the direction of keeping away from base 1, the both ends of jack-up board 41 respectively with sliding block 30, lifter plate 42 all articulate, spring post 28 runs through in sliding block 30, and spring post 28 and sliding block 30 sliding connection, the three 47 springs that set up simultaneously further make sliding block 30 remove smoothly, avoid the jamming.

The blowing module still includes gas transmission pipeline 46, check valve two 39, violently pipe 24, the both ends of violently pipe 24 switch on respectively in intake pipe one 23, intake pipe two 19, check valve two 39 is connected in gas transmission pipeline 46, check valve two 39 can avoid the gas-gas heat exchanger when the work operation, toxic gas flows back to in the air-blower 25, the one end of gas transmission pipeline 46 is connected in violently pipe 24, the other end links to each other with the exhaust end of air-blower 25, air-blower 25 is fixed in the top of supporting seat 29, air-blower 25 can be with gaseous through gas transmission pipeline 46, violently pipe 24 synchronous transport to intake pipe one 23, in intake pipe two 19.

The push-pull module comprises a driving rod 33, a guide seat 34, a second spring 35, a limiting seat 36, a limiting disc 37 and a push-pull rod 38, one end of the driving rod 33 is fixedly connected with the bottom of the moving plate 7, the guide seat 34 is used for guiding the driving rod 33 and enabling the driving rod 33 to move stably, two ends of the second spring 35 are respectively fixedly connected with the driving rod 33 and the push-pull rod 38, the limiting seat 36 is used for guiding the push-pull rod 38, the limiting disc 37 is fixed on the push-pull rod 38, one end of the push-pull rod 38 is fixedly connected with the sliding block 30, when the moving plate 7 moves to the first position or the second position, the limiting disc 37 presses the limiting seat 36, namely the limiting seat 36 achieves the limiting purpose on the limiting disc 37, the push-pull rod 38 is prevented from moving towards the direction close to the driving rod 33, and further the sealing baffle 26 and the pressing block 40 are prevented from moving upwards continuously.

The guide seat 34 and the limiting seat 36 are fixed at the bottom of the base 1, the driving rod 33 is connected to the guide seat 34 in a sliding manner, the push-pull rod 38 is connected to the limiting seat 36 in a sliding manner, and the driving rod 33 penetrates through the long round hole 32.

The exhaust pipe I12 and the exhaust pipe II 13 are both connected with a gas detector 15 for gas detection, the gas detector 15 can detect the content of toxic gases such as ammonia gas and hydrogen sulfide, when the exhaust pipe I12 and the exhaust pipe II 13 contain toxic gases, specific numerical values are displayed on a display screen of the gas detector 15, people can conveniently check the toxic gases, and meanwhile, an alarm lamp gives out a prompt (light flickers) to remind operating personnel; when the movable plate 7 moves to a position, toxic gas is discharged from the first exhaust pipe 12 and the second exhaust pipe 13, and when the content of toxic substances is low or does not exist on the gas detector 15, the alarm lamp gives out a prompt (the color of the lamp is single), namely, the toxic gas is completely discharged in the plate 9, the operation of people is facilitated, the top of the gas detector 15 is connected with the alarm lamp 14, the first exhaust pipe 12 and the second exhaust pipe 13 are both connected with the first check valve 16, the first check valve 16 can avoid the toxic gas from flowing back to the plate 9, and the potential safety hazard is prevented from occurring when the plate 9 is operated.

The working principle is as follows: the cylinder 2 drives the piston rod 4 to contract, so that the moving plate 7 moves towards the direction close to the fixed plate 3, the moving plate 7 applies pulling force to the driving rod 33, the driving rod 33 pulls the push-pull rod 38 to move forwards, the push-pull rod 38 pulls the sliding block 30 to move towards the direction close to the base 1, namely, the jacking plate 41 jacks the lifting plate 42, the pressing block 40 and the sealing baffle 26 move upwards synchronously, when the moving plate 7 moves to a certain position, the first spring 11 is long, the pressing plate 8 is still pressed on the plate 9, the limiting disc 37 is attached to the limiting seat 36, at the moment, the jacking plate 41 is in a vertical state, the sealing baffle 26 is inserted into the intercepting box 17 to prevent external air supply equipment from supplying air to the plate 9, meanwhile, the pressing block 40 is pressed on the point contact switch 44, the point contact switch 44 controls the air blower 25 to be opened, the air blower 25 synchronously conveys the air into the first air inlet pipe 23 and the second air inlet pipe 19 through the air conveying pipeline 46 and the transverse pipe 24, and toxic gas in the plate 9 is discharged from the second air outlet pipe 13 and the first air outlet pipe 12. When the gas detector 15 displays that the content of the toxic substances is low or no, the alarm lamp gives out a prompt (the lamp color is single), namely, the toxic gas in the plate 9 is completely discharged. The cylinder 2 continues to drive the piston rod 4 to contract, the moving plate 7 moves to the second position, the first spring 11 pulls the pressing plate 8 to move forwards, namely the pressing plate 8 is separated from the plates 9, and at the moment, the plates 9 are in a loose state, so that the external air supply equipment can conveniently operate the plates 9 of the heat exchanger in a normal state. After the plate 9 is completely operated, the cylinder 2 drives the piston rod 4 to extend, the pressing plate 8 and the moving plate 7 return, the pressing plate 8 is pressed on the plate 9, the driving rod 33 pushes the push-pull rod 38 to return, the sliding block 30 returns, the sealing baffle 26 returns, namely, the intercepting box 17 is in a conducting state, so that the external air supply equipment can continue supplying air conveniently, the pressing block 40 is separated from the point contact switch 44, and the air blower 25 stops.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a modularization gas-gas heat exchanger convenient to slab is changed which characterized in that: the device comprises a base (1), a pressing plate (8) and a bearing plate (20) which are connected to the top of the base (1), wherein a plurality of plates (9) used for two fluids to exchange heat are connected between the pressing plate (8) and the bearing plate (20), the base (1) is connected with a driving module used for driving the pressing plate (8) to move along the length direction of the base (1), the driving module comprises a moving plate (7) and a cylinder (2), the cylinder (2) is used for driving the moving plate (7) to move, the pressing plate (8) is connected to the moving plate (7), the bearing plate (20) is connected with a first air inlet pipe (23), a first exhaust pipe (12), a second air inlet pipe (19) and a second exhaust pipe (13), the first air inlet pipe (23) and the first exhaust pipe (12) are connected with a flow intercepting module used for intercepting fluids, the flow intercepting module comprises a relatively-stopping box (17), a sealing baffle plate (26) and a lifting plate (42), the sealing baffle plate (26) is connected to a sealing sliding connection box (17), the lifting plate (42) is connected to the sealing baffle plate (26), the lifting module used for driving the sealing baffle plate (26), and the lifting module comprises a sliding block (30) and a sliding block (41), the sliding block (30) is connected to a supporting seat (29) arranged at one end of the base (1), two ends of the jacking plate (41) are respectively connected with the sliding block (30) and the lifting plate (42), the supporting seat (29) is connected with an air blowing module used for blowing air in a first air inlet pipe (23) and a second air inlet pipe (19), the air blowing module comprises an air blower (25) and a point contact switch (44) used for controlling the air blower (25) to be turned on or off, and the bottom of the moving plate (7) is connected with a push-pull module used for driving the sliding block (30) to move in a reciprocating mode;

when the movable plate (7) moves to a position I, the pressing plate (8) is attached to the plate sheet (9), the sliding block (30) moves to the position right below the lifting plate (42), the sealing baffle (26) is blocked on the intercepting box (17), the point contact switch (44) is turned on, and the air blower (25) is turned on;

when the moving plate (7) moves to the second position, the pressing plate (8) is separated from the plate sheet (9), the position of the sliding block (30) is unchanged, the sealing baffle (26) is blocked in the intercepting box (17), the point contact switch (44) is turned on, and the air blower (25) is turned on.

2. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the driving module further comprises a piston rod (4), the power output end of the cylinder (2) is connected with the piston rod (4), one end of the piston rod (4) is fixedly connected with the moving plate (7), and the cylinder (2) is fixed on the fixing plate (3) connected to the top of the base (1).

3. The modular gas-gas heat exchanger convenient for plate replacement according to claim 2, wherein the moving plate (7) is slidably connected to the top of the base (1), the moving plate (7) is connected with a guide column (10) for guiding the moving plate (7), one end of the guide column (10) is fixed to the bearing plate (20), the other end of the guide column penetrates through the pressing plate (8) and the moving plate (7), and the guide column (10) is used for limiting the plate (9).

4. The modular gas-gas heat exchanger convenient for plate replacement according to claim 3, wherein the guide column (10) is provided with a plurality of positioning grooves (5), the moving plate (7) is connected with locking heads (31) matched with the positioning grooves (5), when the heat exchanger normally works, the locking heads (31) are connected to the corresponding positioning grooves (5), the moving plate (7) and the pressing plate (8) are both in a positioning state, and a first spring (11) for driving the moving plate (7) and the pressing plate (8) to be away from each other is connected between the moving plate (7) and the pressing plate (8).

5. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the cut-off module further comprises a connecting plate (43) and a pressing block (40), the pressing block (40) is fixed on the top of the connecting plate (43), the connecting plate (43) is connected to the lifting plate (42), the pressing block (40) corresponds to the point contact switch (44), when the sealing baffle (26) is plugged in the cut-off box (17), the pressing block (40) presses the point contact switch (44), and the blower (25) is turned on.

6. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the lifting module further comprises a third spring (47) and a spring post (28), the spring post (28) is fixed to a rectangular hole (27) arranged in the support seat (29), the sliding block (30) is slidably connected to the rectangular hole (27), the third spring (47) is sleeved on the spring post (28), the third spring (47) is used for driving the sliding block (30) to move towards a direction away from the base (1), and two ends of the jacking plate (41) are respectively hinged to the sliding block (30) and the lifting plate (42).

7. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the blower module further comprises a gas transmission pipeline (46), a second check valve (39) and a transverse pipe (24), two ends of the transverse pipe (24) are respectively communicated with the first inlet pipe (23) and the second inlet pipe (19), the second check valve (39) is connected to the gas transmission pipeline (46), one end of the gas transmission pipeline (46) is connected to the transverse pipe (24), the other end of the gas transmission pipeline is connected to the exhaust end of the blower (25), and the blower (25) is fixed to the top of the supporting base (29).

8. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the push-pull module comprises a driving rod (33), a guide seat (34), a second spring (35), a limiting seat (36), a limiting disc (37) and a push-pull rod (38), one end of the driving rod (33) is fixedly connected with the bottom of the moving plate (7), the guide seat (34) is used for guiding the driving rod (33), two ends of the second spring (35) are respectively fixedly connected with the driving rod (33) and the push-pull rod (38), the limiting seat (36) is used for guiding the push-pull rod (38), the limiting disc (37) is fixed on the push-pull rod (38), one end of the push-pull rod (38) is fixedly connected with the sliding block (30), and when the moving plate (7) moves to the first position or the second position, the limiting disc (37) presses the limiting seat (36).

9. A modular gas-gas heat exchanger convenient for plate replacement according to claim 8, wherein the guide seat (34) and the limiting seat (36) are fixed at the bottom of the base (1), the driving rod (33) is slidably connected to the guide seat (34), the push-pull rod (38) is slidably connected to the limiting seat (36), and the driving rod (33) penetrates through the long round hole (32).

10. The modular gas-gas heat exchanger convenient for plate replacement according to claim 1, wherein the first exhaust pipe (12) and the second exhaust pipe (13) are both connected with a gas detector (15) for gas detection, the top of the gas detector (15) is connected with an alarm lamp (14), and the first exhaust pipe (12) and the second exhaust pipe (13) are both connected with a first check valve (16).