Modularized fast-assembly type vertical container heat exchange unit

Abstract

The invention discloses a modular fast-assembly type vertical container heat exchange unit in the technical field of furnace wall cooling, which comprises a U-shaped tube heat exchanger, the U-shaped tube heat exchanger comprises a tube box, a partition plate, a tube plate, a shell and a sealing gasket, and the modular fast-assembly type vertical container heat exchange unit comprises an expansion unit arranged between the partition plate and the sealing gasket and used for extruding the sealing gasket to enhance the sealing performance; the temperature control mechanism is used for monitoring the temperature in the cavities, located on the two sides of the partition plate, in the tube box and controlling the expansion unit to increase the extrusion strength on the sealing gasket along with the increase of the temperature difference; when the equipment starts to exchange heat, the expansion unit is triggered to act; the expansion unit generates outward extrusion force between the partition plate and the sealing gasket. The extrusion force can specifically compensate the problem that the extrusion force between the partition plate and the tube plate is insufficient due to the lever effect, especially the pressing degree of a sealing gasket at the axis of the tube box is enhanced, finally reliable sealing among the tube box, the partition plate and the tube plate is always kept, and sealing failure caused by temperature difference changes or sealing strip aging and other problems is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furnace wall cooling, in particular to a modular quick-mounting vertical vessel heat exchange unit. BACKGROUND

[0002] In the scene of supplementary cooling of the water-cooled wall of the furnace chamber of the incinerator, due to the large cooling temperature difference existing in the working condition, a vertical U-shaped tube heat exchanger with excellent temperature difference resistance performance needs to be selected as the core heat exchange unit.

[0003] As shown in FIG. 1, liquid A enters from the upper end of the tube box, passes through the shell and exchanges heat with liquid B in the shell, and then exits from the lower end of the tube box. During this process, the upper and lower two cavities of the tube box need to be isolated and sealed. The tube box and the built-in partition plate of the tube box need to form a reliable seal with the tube plate. The sealing principle is that the extrusion force is applied to the outer edge of the tube box through the bolts, so that the tube box and the partition plate jointly extrude the end face of the tube plate, and then the sealing strip between the tube box, the partition plate and the tube plate is stably sealed.

[0004] However, as shown in FIG. 3, the extrusion force F of the bolt directly acts on the outer edge of the tube box, which directly extrudes the tube plate. During this process, a lever effect is easily generated. Influenced by the effect, the end face of the partition plate will have a trend of moving away from the tube plate, and the farther the distance between the end face of the partition plate and the outer edge of the tube box, the stronger the "trend of moving away". Further analysis shows that this trend will directly cause the extrusion force between the end face of the partition plate and the tube plate to present a "gradient distribution" - the extrusion force gradually decreases with the increase of the distance from the outer edge of the tube box. Among them, the extrusion force between the end face of the partition plate at the position of the axis of the tube box and the tube plate is the smallest, and the sealing performance is also the worst.

[0005] When the sealing strip is not aged, it can compensate for the problem of insufficient extrusion force by relying on its own elasticity, temporarily maintaining the sealing effect. However, as the elasticity of the sealing strip gradually decreases after long-term use, the position of the axis is prone to sealing failure. Once the sealing fails, not only the stability of the medium flow will be affected, but also the heat exchange efficiency of the equipment will be significantly reduced. SUMMARY

[0006] The purpose of the present application is to provide a modular quick-mounting vertical vessel heat exchange unit to solve the problems raised in the background art.

[0007] To achieve the above purpose, the present application provides the following technical solution: a modular quick-mounting vertical vessel heat exchange unit, comprising a U-shaped tube heat exchanger, the U-shaped tube heat exchanger comprising a tube box, a partition plate, a tube plate, a shell and a sealing gasket, comprising an expansion unit arranged between the partition plate and the sealing gasket for extruding the sealing gasket to enhance the sealing performance; a temperature control mechanism for monitoring the temperature in the cavities on both sides of the partition plate in the tube box and controlling the expansion unit to increase the extrusion strength of the sealing gasket as the temperature difference increases.

[0008] Preferably, the expansion unit comprises a U-shaped plug plate, the U-shaped plug plate is vertically and slidingly connected to the lower end of the partition plate, the upper end of the U-shaped plug plate is vertically and fixedly connected with at least one connecting rod, and the temperature control mechanism can exert an axial force on the connecting rod.

[0009] Preferably, the temperature control mechanism comprises a detection assembly and a control assembly, the control assembly comprises a mounting shell embedded in the partition plate and axially perpendicular to the end face of the partition plate, the connecting rod is embedded in the partition plate and penetrates the partition plate into the mounting shell, and the detection assembly is used to drive the control assembly to exert an axial force on the connecting rod according to the temperature difference.

[0010] Preferably, the control assembly further comprises a threaded sleeve, the threaded sleeve is vertically and fixedly arranged in the mounting shell, a first screw rod is threadedly connected to the lower end of the threaded sleeve, a threaded hole is vertically arranged at the lower end of the first screw rod, a second screw rod is threadedly connected to the threaded hole, the first screw rod and the second screw rod are vertically and slidingly connected with a first gear and a second gear respectively, the first gear and the second gear are horizontally and rotationally arranged in the mounting shell, the lower end of the second screw rod is in transmission connection with the connecting rod, and the detection assembly can control the rotation amplitudes of the first gear and the second gear according to the temperatures in the cavities on both sides of the partition plate.

[0011] Preferably, the detection assembly comprises two hydraulic shells which are respectively arranged on both sides of the partition plate and are fixedly connected with the inner wall of the tube box at the end portions, the hydraulic shells are slidingly connected with pistons, the pistons are fixedly connected with racks, and the two racks are in meshing connection with the first gear and the second gear respectively.

[0012] Preferably, the hydraulic shell is inserted into the mounting shell near one end of the mounting shell, and the side wall of the hydraulic shell is sealed at the connection position with the mounting shell.

[0013] Preferably, the connecting rod has three.

[0014] Preferably, the upper end of the connecting rod is fixedly connected with a first connecting plate which is horizontally arranged, a second connecting plate is arranged above the first connecting plate, a spring is fixedly connected between the first connecting plate and the second connecting plate, and the upper end of the second connecting plate is fixedly connected with the lower end of the second screw rod.

[0015] Preferably, the first connecting plate and the second connecting plate are jointly sleeved in a clamping sleeve, and the clamping sleeve is used to limit the maximum distance between the first connecting plate and the second connecting plate.

[0016] Compared with the prior art, the present application has the following beneficial effects: When the device starts to exchange heat, the expansion unit will be triggered to act; the expansion unit generates an outward extrusion force between the partition plate and the sealing gasket, which directly acts on the sealing gasket; this extrusion force can compensate for the insufficient extrusion force between the partition plate and the tube plate caused by the lever effect, especially strengthening the compression degree of the sealing gasket at the center of the tube box, and finally ensuring that the tube box, the partition plate and the tube plate always maintain reliable sealing, avoiding sealing failure caused by temperature difference change or aging of the sealing strip.

[0017] The displacement of the two-stage screw can offset each other, so that the expansion unit is controlled without the participation of electrical elements, effectively improving the heat resistance and anti-interference ability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the prior art structure; Figure 2 is a schematic diagram of the overall structure of the present application; Figure 3 is a schematic diagram of the effect of the deformation of the partition plate caused by the lever effect; Figure 4 is a half-section view of the tube box of the present application; Figure 5 is Figure 4 a half-section view of the installation shell and U-shaped plug-in plate; Figure 6 is a schematic diagram of the structure of the expansion unit and the temperature control mechanism after removing the installation shell; Figure 7 is Figure 6 a half-section view of A-A; Figure 8 is a working principle diagram of the control assembly.

[0019] In the drawings, the components represented by each reference number are listed as follows: Tube box 1, partition plate 2, tube plate 3, shell 4, sealing gasket 5, U-shaped plug-in plate 6, connecting rod 7, installation shell 8, threaded sleeve 9, screw rod one 10, threaded hole 11, screw rod two 12, gear one 13, gear two 14, hydraulic shell 15, piston 16, rack 17, connecting plate one 18, connecting plate two 19, spring 20, clamping sleeve 21. DETAILED DESCRIPTION

[0020] Please refer to Figures 1-8The application provides a technical scheme: a modular quick-assembly vertical container heat exchange unit, which comprises a U-shaped tube heat exchanger, the U-shaped tube heat exchanger comprises a tube box 1, a partition plate 2, a tube plate 3, a shell 4 and a sealing gasket 5, and further comprises an expansion unit and a temperature control mechanism; wherein the expansion unit is arranged between the partition plate 2 and the sealing gasket 5 and is used for extruding the sealing gasket 5 to enhance the sealing performance; the temperature control mechanism is used for monitoring the temperature in the cavities on both sides of the partition plate 2 in the tube box 1 and can control the expansion unit to increase the extrusion strength of the sealing gasket 5 as the temperature difference between the two sides increases.

[0021] When the device has not started heat exchange, at this time, the device has no sealing requirement for the cavities on both sides of the partition plate, and there is no obvious temperature difference between the cavities on both sides of the partition plate, and correspondingly, the expansion unit has not started to increase the extrusion strength of the sealing gasket 5. When the device starts heat exchange, when the temperature difference between the two sides increases, it will trigger the expansion unit to act; the expansion unit generates an outward extrusion force between the partition plate 2 and the sealing gasket 5 and directly acts on the sealing gasket 5; the extrusion force can compensate for the insufficient extrusion force between the partition plate 2 and the tube plate 3 due to the lever effect, especially strengthen the compression degree of the sealing gasket 5 at the axial center of the tube box, and finally ensure that the tube box 1, the partition plate 2 and the tube plate 3 always maintain reliable sealing, avoiding sealing failure caused by temperature difference change or aging of the sealing strip and the like.

[0022] Preferably, the expansion unit comprises a U-shaped plug plate 6 which is vertically and slidingly connected to the lower end of the partition plate 2, and at least one connecting rod 7 is vertically and fixedly connected to the upper end of the U-shaped plug plate 6, and the temperature control mechanism can exert an axial force on the connecting rod 7.

[0023] The temperature control mechanism first monitors the temperature difference between the cavities on both sides of the partition plate 2 in real time, and when the temperature difference exceeds the set value, an axial downward pushing force is exerted on the connecting rod 7; the connecting rod 7 transmits the pushing force to the U-shaped plug plate 6 fixed thereto, and drives the U-shaped plug plate 6 to move vertically downward along the sliding structure at the lower end of the partition plate 2; the downward moving U-shaped plug plate 6 directly extrudes the sealing gasket 5 below, generates uniform and directional pressure on the sealing gasket 5, compensates for the insufficient extrusion force of the partition plate 2 at the axial center area due to the lever effect, and finally ensures that the sealing gasket 5 is tightly attached to the tube plate 3, maintaining reliable sealing.

[0024] Preferably, the temperature control mechanism is composed of a detection component and a control component, the control component comprises a mounting shell 8 embedded in the partition plate 2 and axially perpendicular to the end face of the partition plate 2, and the connecting rod 7 is embedded in the partition plate 2 and penetrates the partition plate 2 into the mounting shell 8, and the detection component is used to drive the control component to exert an axial force on the connecting rod 7 according to the temperature difference.

[0025] The detection assembly monitors the temperature of the cavities on both sides of the partition plate 2 in real time, and transmits a signal to the control assembly according to the temperature difference; after receiving the signal, the control assembly applies an axial force to the connecting rod 7 penetrating into the mounting shell 8; the axial force drives the connecting rod 7 to drive the U-shaped plug plate 6 to slide vertically along the lower end of the partition plate 2, thereby extruding the sealing gasket 5 and compensating for the insufficient pressure in the weak sealing area. The sealing of the transmission members is improved by the mounting shell 8.

[0026] Preferably, the control assembly further comprises a threaded sleeve 9 vertically fixedly arranged in the mounting shell 8, a first screw rod 10 threadedly connected to the lower end of the threaded sleeve 9, a threaded hole 11 vertically arranged at the lower end of the first screw rod 10, a second screw rod 12 threadedly connected to the threaded hole 11, a first gear 13 and a second gear 14 vertically slidably connected to the first screw rod 10 and the second screw rod 12 respectively, the first gear 13 and the second gear 14 horizontally arranged in the mounting shell 8, and the lower end of the second screw rod 12 in transmission connection with the connecting rod 7. The detection assembly can control the rotation amplitude of the first gear 13 and the second gear 14 according to the temperature in the cavities on both sides of the partition plate 2.

[0027] The detection assembly controls the rotation amplitude of the first gear 13 and the second gear 14 according to the temperature difference between the two sides of the partition plate 2; when the first gear 13 rotates, the first screw rod 10 slidably connected thereto moves vertically along the threaded sleeve 9; when the second gear 14 rotates, the second screw rod 12 slidably connected thereto moves vertically along the threaded hole 11 of the first screw rod 10; the movement of the two-stage screw rods is superimposed, and an axial force is applied to the connecting rod 7 through transmission, finally driving the U-shaped plug plate 6 to extrude the sealing gasket 5.

[0028] Preferably, the detection assembly comprises two hydraulic shells 15 arranged on both sides of the partition plate 2 and fixedly connected to the inner wall of the tube box 1 at the ends, and pistons 16 slidably connected in the hydraulic shells 15, and racks 17 fixedly connected to the pistons 16, and the two racks 17 are in meshing engagement with the first gear 13 and the second gear 14 respectively.

[0029] The temperature change of the cavities on both sides of the partition plate 2 causes the hydraulic medium in the corresponding hydraulic shell 15 to expand or shrink under the heat, pushing the piston 16 to slide along the hydraulic shell 15; the piston 16 drives the rack 17 to move synchronously, and the rack 17 drives the corresponding first gear 13 or second gear 14 to rotate through meshing; the rotation of the gear is transmitted to an axial force through the first screw rod 10 and the second screw rod 12, and the axial force acts on the connecting rod 7, finally realizing the extrusion compensation of the U-shaped plug plate 6 to the sealing gasket 5; in this process, the reference Figure 8, the moving direction of the two-stage screw is opposite, due to the fact that the liquid inlet side cavity of the partition plate 2 introduces the water to be cooled into the boiler, the temperature T2 of the cavity is always higher (corresponding to the temperature T1 of the liquid outlet side cavity), further, the extension amount L2 of the corresponding screw of the liquid pressure shell 15 increases by ΔL (i.e. moves downward by ΔL) with the increase of the temperature of the cavity, and the extension amount L1 of the other screw decreases by ΔL (i.e. moves upward by ΔL) with the increase of the temperature of the corresponding cavity, so that the temperature difference between the two-stage screw is eliminated, the displacement of the two-stage screw is counteracted, and the screw two 12 cannot move downward; when the temperature difference exists, the screw two 12 can move downward.

[0030] Preferably, the liquid pressure shell 15 is inserted into the mounting shell 8 near one end of the mounting shell 8, and the side wall of the liquid pressure shell 15 is sealed at the connection with the mounting shell 8.

[0031] Preferably, the connecting rod 7 has three.

[0032] The temperature control mechanism synchronously transmits the axial force generated by the temperature difference to the three connecting rods 7; the three connecting rods 7 drive different positions of the U-shaped insertion plate 6, so that the U-shaped insertion plate 6 is uniformly stressed when sliding vertically along the lower end of the partition plate 2, and further uniformly extrudes the sealing gasket 5, thereby further improving the sealing stability.

[0033] Preferably, a connecting plate one 18 is fixedly connected to the upper end of the connecting rod 7 and arranged horizontally, a connecting plate two 19 is arranged above the connecting plate one 18, a spring 20 is fixedly connected between the connecting plate one 18 and the connecting plate two 19, and the upper end of the connecting plate two 19 is fixedly connected to the lower end of the screw two 12.

[0034] The screw two 12 transmits the axial force downward to push the connecting plate two 19 to move downward; the connecting plate two 19 transmits the force to the connecting plate one 18 after buffering by compressing the spring 20; the connecting plate one 18 drives the connecting rod 7 to extrude the sealing gasket 5; the spring 20 can absorb the impact of the axial force, and at the same time, when the temperature difference decreases and the screw two 12 retreats, the spring 20 drives the U-shaped insertion plate 6 to reset, thereby avoiding the long-term excessive extrusion of the sealing gasket 5.

[0035] Preferably, the connecting plate one 18 and the connecting plate two 19 are jointly sleeved in a clamping sleeve 20, and the clamping sleeve 20 is used to limit the maximum distance between the connecting plate one 18 and the connecting plate two 19.

[0036] The screw two 12 pushes the connecting plate two 19 to move downward, the spring 20 is compressed and drives the connecting plate one 18 to move downward; the clamping sleeve 20 limits the maximum distance between the connecting plate one 18 and the connecting plate two 19, thereby providing a certain pre-tightening force for the spring 20 and reducing the stroke generated by the equipment to exert a predetermined extrusion force.

Claims

1. A modular quick-installation vertical container heat exchange unit, comprising a U-tube heat exchanger, wherein the U-tube heat exchanger comprises a tube box (1), a partition plate (2), a tube sheet (3), a shell (4), and a sealing gasket (5), characterized in that: It includes an expansion unit disposed between the partition (2) and the sealing gasket (5) for compressing the sealing gasket (5) to enhance the sealing performance; The temperature control mechanism is used to monitor the temperature inside the cavity located on both sides of the partition (2) in the tube box (1), and to control the expansion unit to increase the compression strength of the sealing gasket (5) as the temperature difference increases.

2. The modular quick-installation vertical container heat exchange unit according to claim 1, characterized in that: The expansion unit includes a U-shaped insert (6), which is vertically slidably connected to the lower end of the partition (2). At least one connecting rod (7) is vertically fixedly connected to the upper end of the U-shaped insert (6), and the temperature control mechanism can apply axial force to the connecting rod (7).

3. The modular quick-installation vertical container heat exchange unit according to claim 2, characterized in that: The temperature control mechanism consists of a detection component and a control component. The control component includes a mounting shell (8) embedded in the partition (2) and axially perpendicular to the end face of the partition (2). The connecting rod (7) is embedded in the partition (2) and extends through the partition (2) to the mounting shell (8). The detection component is used to drive the control component to apply an axial force to the connecting rod (7) according to the temperature difference.

4. A modular quick-installation vertical container heat exchange unit according to claim 3, characterized in that: The control component also includes a threaded sleeve (9), which is vertically fixed inside the mounting shell (8). The lower end of the threaded sleeve (9) is threadedly connected to a screw rod (10), and the lower end of the screw rod (10) is vertically provided with a threaded hole (11). The threaded hole (11) is threadedly connected to a screw rod (12). The screw rod (10) and the screw rod (12) are vertically slidably connected to a gear (13) and a gear (14), respectively. The gear (13) and the gear (14) are both horizontally rotatably disposed inside the mounting shell (8). The lower end of the screw rod (12) is connected to the connecting rod (7) for transmission. The detection component can control the rotation amplitude of the gear (13) and the gear (14) according to the temperature inside the cavities on both sides of the partition (2).

5. A modular quick-installation vertical container heat exchange unit according to claim 4, characterized in that: The detection assembly includes two hydraulic housings (15) respectively disposed on both sides of the partition (2) and fixedly connected at their ends to the inner wall of the tube box (1). Each hydraulic housing (15) is slidably connected to a piston (16), and each piston (16) is fixedly connected to a rack (17). The two racks (17) are respectively meshed with gear one (13) and gear two (14).

6. A modular quick-installation vertical container heat exchange unit according to claim 5, characterized in that: The hydraulic housing (15) is inserted into the mounting housing (8) at one end near the mounting housing (8), and the connection between the side wall of the hydraulic housing (15) and the mounting housing (8) is sealed.

7. A modular quick-installation vertical container heat exchange unit according to claim 3, characterized in that: There are three connecting rods (7).

8. A modular quick-installation vertical container heat exchange unit according to claim 4, characterized in that: The upper end of the connecting rod (7) is fixedly connected to a horizontally arranged connecting plate one (18), and a connecting plate two (19) is arranged above the connecting plate one (18). A spring (20) is fixedly connected between the connecting plate one (18) and the connecting plate two (19). The upper end of the connecting plate two (19) is fixedly connected to the lower end of the screw two (12).

9. A modular quick-installation vertical container heat exchange unit according to claim 8, characterized in that: The first connecting plate (18) and the second connecting plate (19) are fitted together in the sleeve (21), which is used to limit the maximum distance between the first connecting plate (18) and the second connecting plate (19).

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