Expandable detachable all-welded plate heat exchanger

Abstract

The utility model relates to an expandable detachable all-welded plate heat exchanger, which comprises a fixed clamping plate, a movable pressing plate, an upper guide rod, a support column, a lower guide rod and a clamping bolt pair, a plurality of plate bundles are arranged between the fixed clamping plate and the movable clamping plate, pressure-bearing pads are arranged among the plate bundles, convex-concave flange components are arranged at corner holes of the plate bundles, and the convex-concave flange components are connected with the support column. Each concave-convex flange assembly comprises a concave flange, a short pipe and a convex flange, the short pipe is welded between the concave flange and the convex flange, a plurality of holes are formed in the short pipe, the short pipe penetrates through corner holes of the plate bundles, the concave flanges and the convex flanges are connected with the plate bundles in a welded mode, and the adjacent plate bundles are connected in an inserted mode through the concave-convex flange assemblies. A flange sealing gasket is arranged between every two adjacent concave-convex flange assemblies. The concave-convex flange assembly is detachable, damaged parts can be directly replaced, plate bundles can be increased or decreased according to actual needs, and the purpose of increasing or reducing the capacity of the heat exchanger is achieved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment, in particular to an expandable and detachable fully welded plate heat exchanger. Background Art

[0002] The fully welded plate heat exchanger has a corrugated plate structure similar to that of a plate heat exchanger. It is sealed using a fully welded process and has no gaskets between the plates, filling the application gap of detachable plate heat exchangers. It is resistant to high temperatures and abrasion and has a longer service life.

[0003] Fully welded plate heat exchangers, due to their multiple welded heat exchange plates, are non-detachable. If some heat exchange plates become corroded or worn and require replacement, all plates must be replaced, resulting in high costs and limited capacity expansion. Furthermore, there are no protective measures against high-temperature media, posing a significant safety hazard should a leak occur. Utility Model Content

[0004] The purpose of the utility model is to provide an expandable and detachable fully welded plate heat exchanger, which is detachable and can be replaced directly and conveniently.

[0005] The technical solution of this utility model:

[0006] A detachable, fully welded plate heat exchanger with expandable capacity comprises a fixed clamping plate, a movable pressure plate, an upper guide rod, a support, a lower guide rod, and a pair of clamping bolts. A plurality of plate bundles are installed between the fixed clamping plate and the movable clamping plate. Pressure pads are provided between the plate bundles. A convex-concave flange assembly is installed at the corner hole of the plate bundle. The concave-convex flange assembly comprises a concave flange, a short tube, and a convex flange. A short tube is welded between the concave flange and the convex flange. A plurality of holes are opened on the short tube. The short tube passes through the corner hole of the plate bundle. The concave flange and the convex flange are respectively welded to the plate bundle. Adjacent plate bundles are plugged into each other through the concave-convex flange assembly. A flange sealing gasket is provided between two adjacent concave-convex flange assemblies.

[0007] Beneficial effects of the utility model:

[0008] 1. The heat exchanger of the present application is detachable through the concave and convex flange assembly. Damaged parts can be directly replaced, and plate bundles can be increased or decreased according to actual needs to achieve the purpose of expanding or reducing the capacity of the heat exchanger.

[0009] 2. The heat exchanger of this application is fully welded, and there is no sealing gasket between the plates, which improves the high temperature bearing capacity of the plate heat exchanger, which can reach 200-300℃.

[0010] 3. The heat exchanger of this application is equipped with a protective device to improve the ability to prevent and control leakage of high-temperature media. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0012] Figure 1 This is the general assembly drawing of the detachable fully welded plate heat exchanger for this application.

[0013] Figure 2 This is a schematic diagram of the assembly of the detachable fully welded plate heat exchanger plate bundle for this application.

[0014] Figure 3 This is a schematic diagram of the plate bundle structure of the detachable fully welded plate heat exchanger in this application.

[0015] Figure 4 This is a schematic diagram of the plate structure of the detachable fully welded plate heat exchanger for this application. (with raised flange)

[0016] Figure 5 This is a schematic diagram of the plate structure of the detachable fully welded plate heat exchanger for this application. (with concave flange)

[0017] Figure 6 This is a structural diagram of the concave and convex flange assembly assembled on the plate in this application.

[0018] Figure 7 This is an exploded view of the male and female flange assembly for this application.

[0019] Figure 8 This is a structural schematic diagram of the flange sealing gasket of this application assembled on a male-female flange assembly.

[0020] Figure 9 This is a schematic diagram of the flange sealing gasket structure for this application.

[0021] Figure 10 This is the outline drawing of the detachable fully welded plate heat exchanger protective cover for this application.

[0022] Figure 11 This is a side view of the detachable fully welded plate heat exchanger protective cover for this application.

[0023] Figure 12 This is a side view of the detachable fully welded plate heat exchanger protective cover for this application.

[0024] Figure 13 This is a top view of the detachable fully welded plate heat exchanger protective cover of this application.

[0025] Reference numerals:

[0026] Fixed clamping plate 1; movable pressure plate 2; upper guide rod 3; support 4; lower guide rod 5; clamping bolt pair 6; plate bundle 7; pressure pad 8; concave and convex flange assembly 9; concave flange 91; short pipe 92; convex flange 93; flange sealing gasket 10; protective cover 11; liquid accumulation tray 12; pressure transmitter 13; drain valve 14; plate 15; ground angle bolt 16. DETAILED DESCRIPTION

[0027] To address the problems in the background art, the present invention has invented a detachable, expandable, fully welded plate heat exchanger. This fully welded heat exchanger is detachable and expandable, allowing for direct replacement of damaged components. It also improves the ability to prevent and control high-temperature media leaks, saving valuable time for emergency response.

[0028] It should be noted that, in the description of the present invention, the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] The expandable detachable fully welded plate heat exchanger of the present application includes a fixed clamping plate, a movable pressure plate, an upper guide rod, a support, a lower guide rod, and a clamping bolt pair. A plurality of plate bundles are installed between the fixed clamping plate and the movable clamping plate. A pressure pad is provided between the plate bundles. A convex-concave flange assembly is installed at the corner hole of the plate bundle. The concave-convex flange assembly includes a concave flange, a short tube, and a convex flange. A short tube is welded between the concave flange and the convex flange. A plurality of holes are opened on the short tube. The short tube passes through the corner hole of the plate bundle. The concave flange and the convex flange are respectively welded to the plate bundle. Adjacent plate bundles are plug-connected to each other through the concave-convex flange assembly. A flange sealing gasket is provided between two adjacent concave-convex flange assemblies.

[0030] The heat exchanger also includes a protective device, which includes a protective cover, a liquid collection pan, and a pressure transmitter. The lower end of the protective cover is connected to the upper end of the liquid collection pan by bolts. The pressure transmitter is installed on the side of the protective cover. A drain valve is installed on the side of the liquid collection pan. The pressure transmitter converts the leakage signal into a digital signal through the PLC and transmits it to the central control center. The central control center controls the solenoid valves on the water inlet pipes on the cold and hot sides of the heat exchanger to close.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] The present application uses laser welding to weld the plates 15 (ten plates or the number can be adjusted as needed) into a plate bundle 7, and welds the concave and convex flange assemblies 9 at the corner holes of the plate bundle (the four corner holes of the plates that make up the plate bundle). The concave and convex flange assembly 9 is welded by three parts: a concave flange 91, a short tube 92, and a convex flange 93. A steel short tube 92 is used to support the convex flange 93 and the concave flange 91. The steel short tube 92 is inserted into the corner hole channel formed by the multiple plates of the plate bundle to prevent damage to the plate bundle during the clamping process. The short tube 92 is distributed with circular holes synchronized with the corner hole flow channel. The plate bundles are assembled on the frame in sequence and clamped by the clamping bolts 6. The plate bundles 7 are connected by the concave and convex flange assemblies. The concave and convex flange assemblies are sealed by the flange sealing gasket 10. The flange sealing gasket 10 is made of the same material as the flange sealing gasket of the system pipeline. The convex and concave flange assemblies of the plate bundles on the left and right sides of all plate bundles are squeezed and connected with the movable clamping plate or the fixed clamping plate. Pressure pads 8 are added between the plate bundles 7 to prevent the plate bundles from being unable to bear pressure due to hollowing.

[0033] After the heat exchanger is assembled, a rigid protective cover is installed on the outside to prevent the high-temperature medium from posing a risk to the outside world when the heat exchanger leaks. A liquid collection tray 12 is provided below the rigid protective cover 11 and a pressure transmitter 13 is provided on the upper part to monitor the risk of heat exchanger leakage. The heat exchanger is connected to the liquid collection tray via a ground bolt 16. The utility model uses a leak detector (or pressure transmitter) to convert the leakage signal through the PLC into a digital signal and transmit it to the central control center. The central control center transmits a shutdown signal to automatically close the solenoid valves of the hot and cold water inlet pipes of the heat exchanger, and then discharges the leaked liquid through the drain valve 14, thereby improving the ability to prevent and control the leakage of high-temperature media. The present application realizes the ability of fully welded plate replacement to be detachable and expandable, and damaged parts can be directly replaced; the purpose is to improve the ability to prevent and control the leakage of high-temperature media. It wins precious time for emergency rescue. The present application is a fully welded form, with no sealing gaskets between the plates, which improves the ability to withstand high temperatures to 200-300℃.

[0034] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and does not deviate from the technical solution of the present invention, and designs a structure and implementation similar to the above embodiment without inventiveness based on the technical essence of the present invention, it shall fall within the scope of protection of the present invention.

Claims

1. An expandable, detachable, fully welded plate heat exchanger comprising a fixed clamping plate, a movable pressure plate, an upper guide rod, a support, a lower guide rod, and a clamping bolt pair, characterized in that: A plurality of plate bundles are installed between the fixed clamping plate and the movable clamping plate, pressure pads are provided between the plate bundles, and convex-concave flange assemblies are installed at the corner holes of the plate bundles. The concave-convex flange assembly includes a concave flange, a short tube, and a convex flange. A short tube is welded between the concave flange and the convex flange, and a plurality of holes are opened on the short tube. The short tube passes through the corner holes of the plate bundle, and the concave flange and the convex flange are respectively welded to the plate bundles. Adjacent plate bundles are plugged into each other through the concave-convex flange assembly, and a flange sealing gasket is provided between two adjacent concave-convex flange assemblies.

2. The expandable and detachable fully welded plate heat exchanger according to claim 1, characterized in that: The heat exchanger also includes a protective device, which includes a protective cover, a liquid collection pan, and a pressure transmitter. The lower end of the protective cover is connected to the upper end of the liquid collection pan by bolts. The pressure transmitter is installed on the side of the protective cover. A drain valve is installed on the side of the liquid collection pan. The pressure transmitter converts the leakage signal into a digital signal through the PLC and transmits it to the central control center. The central control center controls the solenoid valves on the water inlet pipes on the cold and hot sides of the heat exchanger to close.

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