A plate heat exchanger with detachable built-in filter screen

Abstract

The utility model relates to a plate heat exchanger with detachable built-in filter screen, including fixed compression plate, movable compression plate, and the plate piece and sealing gasket clamped between both, movable compression plate's hot and cold side entrance place is equipped with the built-in filter screen mounting hole for installing hot side entrance built-in filter screen and cold side entrance built-in filter screen, and movable compression plate is equipped with the overhaul blind plate corresponding built-in filter screen mounting hole, and hot side and cold side entrance built-in filter screen all are equipped with big flanging outside movable compression plate, and all are equipped with small flanging in fixed compression plate one end, fixed compression plate's hot and cold side entrance place is equipped with built-in filter screen baffle, and built-in filter screen baffle and small flanging corresponding position are equipped with built-in filter screen compression pad, and overhaul blind plate compresses big flanging, and built-in filter screen baffle, built-in filter screen compression pad compress small flanging. Overhaul only needs to open the overhaul blind plate to draw out the filter screen, improves the overhaul efficiency, and at the same time passes through double flanging and compression seal, effectively avoids the impurity from the gap into the flow channel, reduces the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a plate heat exchanger with a detachable built-in filter. Background Technology

[0002] Plate heat exchangers are highly efficient and compact heat exchange devices. Their core structure consists of several corrugated metal plates and gaskets stacked alternately, forming multiple isolated flow channels. The working medium flows counter-currently through the narrow, tortuous channels between adjacent plates, achieving heat exchange through the plates. Due to the small cross-section and narrow gaps between the channels, particles, sediment, or dirt in the medium can easily accumulate at the inlet or inside of the channels, leading to localized blockages, severely affecting heat transfer efficiency, and even causing equipment downtime for maintenance. Therefore, installing a filtration device on the medium inlet side of the plate heat exchanger is crucial.

[0003] Currently, common built-in filters are mainly divided into two structures: front-entry and rear-entry. Front-entry built-in filters are typically installed on the side of the fixed pressure plate. The filters are relatively long and need to be inserted from the front of the heat exchanger. However, during cleaning and maintenance, the short connecting pipe or valve at the corner hole must be removed to extract the filter, resulting in a complex, time-consuming, and labor-intensive maintenance process. While rear-entry built-in filters are easier to remove from the side of the movable pressure plate, there is a large gap between them and the corner hole of the heat exchanger. This gap cannot effectively intercept fine impurities, allowing impurities to enter the flow channel and cause blockages. This results in poor filtration reliability and affects the long-term stable operation of the equipment.

[0004] Therefore, how to provide a plate heat exchanger with a removable built-in filter that can balance ease of maintenance and filtration effectiveness is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This invention provides a plate heat exchanger with a detachable built-in filter to solve the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, this utility model provides a plate heat exchanger with a detachable built-in filter screen, including a fixed clamping plate, a movable clamping plate, plates and sealing gaskets, wherein the plates and sealing gaskets are sandwiched between the fixed clamping plate and the movable clamping plate;

[0007] The movable clamping plate is provided with built-in filter installation holes at both the hot and cold side inlets. The built-in filter at the hot side inlet and the built-in filter at the cold side inlet can be detachably installed in the built-in filter installation holes respectively. The movable clamping plate is provided with a maintenance blind plate corresponding to the built-in filter installation holes.

[0008] Both the hot-side inlet built-in filter and the cold-side inlet built-in filter have large flanges on the outside of the movable clamping plate and small flanges on one end of the fixed clamping plate; the fixed clamping plate has a built-in filter baffle at the hot and cold side inlets, and a built-in filter clamping pad is provided at the position corresponding to the small flange on the built-in filter baffle.

[0009] The large flange is pressed by the inspection blind plate, thereby pressing and sealing the small flange with the built-in filter screen baffle and the built-in filter screen pressing pad.

[0010] Preferably, the hot and cold side inlets of the fixed clamping plate are connected to the built-in filter baffle via hot side inlet flange and cold side inlet flange, respectively.

[0011] Preferably, the inspection blind flange is fixedly connected to the movable clamping plate via a detachable connector.

[0012] Preferably, the lengths of the built-in filter screens at the hot side inlet and the cold side inlet are greater than the distance between the built-in filter screen baffle and the outer side of the movable clamping plate.

[0013] Preferably, the built-in filter clamping pad is made of an elastic sealing material.

[0014] Preferably, the filter pore size of the built-in filter screen on the hot side inlet and the built-in filter screen on the cold side inlet is 0.1~5mm.

[0015] Preferably, the fixed clamping plate and the movable clamping plate are clamped and fixed by clamping bolts.

[0016] Preferably, the clamping bolts are evenly distributed along the edges of the fixed clamping plate and the movable clamping plate.

[0017] Preferably, the movable clamping plate is provided with a sealing groove adapted to the maintenance blind plate, and a sealing ring is provided in the sealing groove.

[0018] Preferably, the outer diameter of the large flange is adapted to the diameter of the mounting hole of the built-in filter screen, and the outer diameter of the small flange is smaller than the size of the corresponding mating surface on the built-in filter screen baffle.

[0019] Compared with the prior art, the plate heat exchanger with a detachable built-in filter provided by this utility model has the following advantages:

[0020] 1. This utility model has an internal filter screen installed on the side of the movable clamping plate and a maintenance blind plate. When cleaning the internal filter screen, it is not necessary to disassemble the short pipe and valve at the corner hole of the heat exchanger. Only the maintenance blind plate needs to be opened and the filter screen can be pulled out directly from the rear end of the movable clamping plate to complete the maintenance. Compared with the cumbersome disassembly process of the prior art, the maintenance time is greatly shortened, the maintenance efficiency is significantly improved, and the maintenance operation difficulty is reduced.

[0021] 2. This utility model features a large flange on the outside of the movable clamping plate with the built-in filter and a small flange on one end of the fixed clamping plate. Combined with the built-in filter baffle and clamping pad at the hot and cold side inlets of the fixed clamping plate, and with the force of the large flange pressed by the maintenance blind plate, the small flange of the built-in filter can be tightly fitted and pressed against the filter baffle and clamping pad. This structural design effectively eliminates the gap between the built-in filter and the corner holes of the heat exchanger, preventing impurities from entering the heat exchanger flow channel through the gap, avoiding flow channel blockage, extending the maintenance cycle for overall disassembly and cleaning of the plate heat exchanger, and reducing equipment maintenance costs and downtime losses. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a plate heat exchanger with a detachable built-in filter in a specific embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the fixed clamping plate in a specific embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the movable clamping plate in a specific embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram showing the pressing state of the built-in filter baffle and the built-in filter pressing pad in a specific embodiment of this utility model.

[0026] In the diagram: 10-Fixed clamping plate, 20-Modible clamping plate, 30-Plate, 40-Hot side inlet built-in filter, 50-Cold side inlet built-in filter, 60-Inspection blind flange, 70-Built-in filter baffle, 71-Hot side inlet flange, 72-Cold side inlet flange, 80-Built-in filter clamping pad. Detailed Implementation

[0027] To illustrate the technical solution of the above utility model in more detail, specific embodiments are listed below to demonstrate the technical effects; it should be emphasized that these embodiments are used to illustrate the present utility model and not to limit the scope of the present utility model.

[0028] The plate heat exchanger with a detachable built-in filter provided by this utility model, such as Figures 1 to 4 As shown, it includes a fixed clamping plate 10, a movable clamping plate 20, a plate 30, and a sealing gasket (not shown). The plate 30 and the sealing gasket are sandwiched between the fixed clamping plate 10 and the movable clamping plate 20.

[0029] The movable clamping plate 20 has built-in filter mounting holes at both the hot and cold side inlets. A hot-side inlet built-in filter 40 and a cold-side inlet built-in filter 50 are detachably mounted in each of these holes. The filter pore diameter of the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 is 0.1~5mm, and the filter material is any one of stainless steel, titanium alloy, or high-polymer wear-resistant material, capable of meeting the filtration needs of most industrial media and effectively intercepting solid impurities in the media. A maintenance blind plate 60 is provided on the movable clamping plate 20 corresponding to the built-in filter mounting holes.

[0030] The hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 are both provided with large flanges on the outside of the movable pressing plate 20, and small flanges on one end of the fixed pressing plate 10; the fixed pressing plate 10 is provided with a built-in filter baffle 70 at the hot and cold side inlets, and a built-in filter pressing pad 80 is provided at the position corresponding to the small flange on the built-in filter baffle 70.

[0031] The large flange is pressed by the inspection blind plate 60, thereby pressing and sealing the small flange with the built-in filter screen baffle 70 and the built-in filter screen pressing pad 80.

[0032] This utility model, through the coordinated design of the double-flanged structure of the built-in filter screen, the maintenance blind plate 60, the built-in filter screen baffle 70, and the built-in filter screen clamping pad 80, not only realizes the detachable assembly of the built-in filter screen 40 at the hot side inlet and the built-in filter screen 50 at the cold side inlet, but also eliminates the gap between the filter screen and the heat exchanger inlet through the clamping action. It solves the problems of space occupation by traditional external filter screens and cumbersome maintenance of built-in fixed filter screens, and effectively prevents impurities from entering the flow channel through the gaps, thereby improving the filtration effect and the stability of equipment operation.

[0033] In some embodiments, please refer to the following: Figure 2 The hot and cold side inlets of the fixed clamping plate 10 are connected to the built-in filter screen baffle 70 via hot-side inlet flange 71 and cold-side inlet flange 72, respectively. This connection of the built-in filter screen baffle 70 with hot-side inlet flange 71 and cold-side inlet flange 72 allows for stable installation and quick disassembly of the built-in filter screen baffle 70, facilitating its maintenance and replacement. Furthermore, the flange connection provides good sealing, preventing media leakage at the hot and cold side inlets of the fixed clamping plate 10 and improving the reliability of equipment operation.

[0034] In some embodiments, the maintenance blind flange 60 is fixedly connected to the movable clamping plate 20 by a detachable connector (such as a bolt, a buckle, or a locking pin). The design of the detachable connector makes the disassembly and assembly of the maintenance blind flange 60 simple and quick, without the need for complicated tools, which greatly shortens the opening time when the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 are inspected, and further improves the inspection efficiency.

[0035] In some embodiments, the lengths of the built-in filter screen 40 at the hot side inlet and the built-in filter screen 50 at the cold side inlet are greater than the distance between the built-in filter screen baffle 70 and the outer side of the movable clamping plate 20, and the length difference is 1~10mm. The slightly longer lengths of the built-in filter screen 40 at the hot side inlet and the built-in filter screen 50 ensure that when the large flange of the maintenance blind flange 60 is clamped, the small flange can form an interference fit with the built-in filter screen baffle 70 and the built-in filter screen clamping pad 80, enhancing the sealing effect and preventing impurities from leaking due to assembly gaps.

[0036] In some embodiments, the built-in filter clamping pad 80 may be made of elastic sealing materials such as rubber, silicone or fluororubber. The elastic sealing material has good deformation ability and can fully fill the tiny gap between the small flange and the built-in filter baffle 70 under the action of clamping force, thereby improving the sealing performance. At the same time, it can buffer the impact of the medium on the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 during operation, and extend the service life of the hot-side inlet built-in filter 40, the cold-side inlet built-in filter 50 and the built-in filter baffle 70.

[0037] In some embodiments, the fixed clamping plate 10 and the movable clamping plate 20 are clamped and fixed by clamping bolts. The clamping bolts are clamped in a way that distributes the force evenly, which can ensure the sealing effect between the plate 30 and the sealing gasket and prevent the heat exchange medium from leaking. At the same time, the bolt connection structure is mature and reliable, which facilitates the assembly, disassembly and maintenance of the heat exchanger.

[0038] In some embodiments, the clamping bolts are evenly distributed along the edges of the fixed clamping plate 10 and the movable clamping plate 20. The even distribution of the clamping bolts can ensure that the clamping force is evenly transmitted on the fixed clamping plate 10 and the movable clamping plate 20, avoiding excessive local pressure that could cause deformation of the plate 30 or damage to the sealing gasket, thus ensuring the heat exchange efficiency and sealing performance of the heat exchanger.

[0039] In some embodiments, the movable clamping plate 20 is provided with a sealing groove adapted to the maintenance blind plate 60, and a sealing ring is provided in the sealing groove to achieve a sealing fit between the maintenance blind plate 60 and the movable clamping plate 20, thereby enhancing the sealing performance between the maintenance blind plate 60 and the movable clamping plate 20, preventing the heat exchange medium from leaking from the built-in filter installation hole, and at the same time, the sealing ring can reduce the wear of the maintenance blind plate 60 during disassembly and assembly, and extend the service life of the maintenance blind plate 60.

[0040] In some embodiments, the outer diameter of the large flange is adapted to the diameter of the built-in filter mounting hole, and the outer diameter of the small flange is smaller than the size of the corresponding mating surface on the built-in filter baffle 70. The adaptation of the large flange to the built-in filter mounting hole enables precise positioning of the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50, preventing displacement of the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 under media impact; the size adaptation of the small flange facilitates the insertion of the hot-side inlet built-in filter 40 and the cold-side inlet built-in filter 50 into the built-in filter mounting hole and their contact with the built-in filter baffle 70 and the built-in filter clamping pad 80, ensuring ease of assembly and sealing.

[0041] In summary, the plate heat exchanger with a detachable built-in filter provided by this utility model includes a fixed clamping plate 10, a movable clamping plate 20, plates 30, and a sealing gasket. The plates 30 and the sealing gasket are sandwiched between the fixed clamping plate 10 and the movable clamping plate 20. The movable clamping plate 20 has built-in filter mounting holes at both the hot and cold side inlets, and a hot-side inlet built-in filter 40 and a cold-side inlet built-in filter 50 are detachably mounted in each of these mounting holes. The movable clamping plate 20 has corresponding mounting holes for the built-in filter. The blind flange 60 is used for maintenance. The built-in filter screen 40 on the hot side and the built-in filter screen 50 on the cold side are both provided with large flanges on the outside of the movable clamping plate 20, and small flanges on one end of the fixed clamping plate 10. The fixed clamping plate 10 is provided with a built-in filter screen baffle 70 at the hot and cold side inlets, and a built-in filter screen clamping pad 80 is provided at the position corresponding to the small flange on the built-in filter screen baffle 70. The large flange is pressed by the blind flange 60, thereby pressing and sealing the small flange with the built-in filter screen baffle 70 and the built-in filter screen clamping pad 80. This utility model, through the coordinated design of the double-flanged structure of the built-in filter screen, the maintenance blind plate 60, the built-in filter screen baffle 70, and the built-in filter screen clamping pad 80, not only realizes the detachable assembly of the built-in filter screen 40 at the hot side inlet and the built-in filter screen 50 at the cold side inlet, but also eliminates the gap between the filter screen and the heat exchanger inlet through the clamping action. It solves the problems of space occupation by traditional external filter screens and cumbersome maintenance of built-in fixed filter screens, and effectively prevents impurities from entering the flow channel through the gaps, thereby improving the filtration effect and the stability of equipment operation.

[0042] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Therefore, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A plate heat exchanger with a detachable built-in filter, characterized in that, It includes a fixed clamping plate, a movable clamping plate, a plate, and a sealing gasket, wherein the plate and the sealing gasket are sandwiched between the fixed clamping plate and the movable clamping plate; The movable clamping plate is provided with built-in filter installation holes at both the hot and cold side inlets. The built-in filter at the hot side inlet and the built-in filter at the cold side inlet can be detachably installed in the built-in filter installation holes respectively. The movable clamping plate is provided with a maintenance blind plate corresponding to the built-in filter installation holes. Both the hot-side inlet built-in filter and the cold-side inlet built-in filter have large flanges on the outside of the movable clamping plate and small flanges on one end of the fixed clamping plate; the fixed clamping plate has a built-in filter baffle at the hot and cold side inlets, and a built-in filter clamping pad is provided at the position corresponding to the small flange on the built-in filter baffle. The large flange is pressed by the inspection blind plate, thereby pressing and sealing the small flange with the built-in filter screen baffle and the built-in filter screen pressing pad.

2. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The hot and cold side inlets of the fixed clamping plate are connected to the built-in filter screen baffle via hot side inlet flange and cold side inlet flange, respectively.

3. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The maintenance blind flange is fixedly connected to the movable clamping plate via a detachable connector.

4. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The lengths of the built-in filters at the hot and cold inlets are greater than the distance between the built-in filter baffle and the outer side of the movable clamping plate.

5. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The built-in filter compression pad is made of elastic sealing material.

6. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The filter pore size of the built-in filter screen on the hot side inlet and the built-in filter screen on the cold side inlet is 0.1~5mm.

7. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The fixed clamping plate and the movable clamping plate are clamped and fixed together by clamping bolts.

8. The plate heat exchanger with a detachable built-in filter as described in claim 7, characterized in that, The clamping bolts are evenly distributed along the edges of the fixed clamping plate and the movable clamping plate.

9. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The movable clamping plate is provided with a sealing groove that is compatible with the maintenance blind plate, and a sealing ring is provided in the sealing groove.

10. The plate heat exchanger with a detachable built-in filter as described in claim 1, characterized in that, The outer diameter of the large flange is adapted to the diameter of the built-in filter mounting hole, and the outer diameter of the small flange is smaller than the size of the corresponding mating surface on the built-in filter baffle.

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