Temperature-resistant and corrosion-resistant sealing gasket for plate heat exchanger and plate heat exchanger

Abstract

The utility model relates to a temperature-resistant and corrosion-resistant sealing gasket for a plate heat exchanger and the plate heat exchanger, the sealing gasket is divided into a sealing straight edge area, a sealing corner hole area and a second sealing area, and the cross section of the sealing gasket is rectangular. And the compression ratio of the sealing gasket is 7-17%. The sealing gasket in the plate heat exchanger is the sealing gasket. The section of the sealing gasket is in a rectangular shape, the sealing gasket is machined and formed through laser cutting, the sealing gasket is made of an asbestos-free rubber material, the maximum bearing temperature of the sealing gasket is 250 DEG C, the sealing gasket can resist various high-strength acid, alkali and other corrosive media, the maximum bearing pressure of the sealing gasket is 1.6 Mpa, and the sealing gasket is good in sealing performance, high in mechanical strength, good in tensile property and not prone to breakage and deformation.

Description

TECHNICAL FIELD

[0001] The utility model relates to plate heat exchanger technical field, concretely speaking, a kind of sealing gasket and plate heat exchanger for sealing use between the plate sheet of temperature-resistant corrosion-resistant plate heat exchanger. BACKGROUND

[0002] Plate heat exchanger is a kind of high-efficiency, energy-saving, compact heat exchange equipment, with high heat transfer efficiency, compact structure, small footprint, wide application range, easy installation and cleaning and other advantages. Its core components are plate sheet and sealing gasket, and the sealing gasket is the key core component of detachable plate heat exchanger, and the quality of the sealing gasket directly affects the pressure resistance and temperature resistance, working performance and adaptability.

[0003] For a long time, the sealing gaskets used in plate heat exchanger are mainly made of butadiene-acrylonitrile rubber and ethylene-propylene-diene rubber, which have the common characteristics of good elasticity, large compression ratio and good sealing effect. However, with the increasing market demand, the limitations of the above sealing gaskets are gradually highlighted. The rubber gasket is prone to aging, cannot resist high temperature, and is easily affected by chemicals. During use, the performance of the rubber gasket will decrease with the change of environment, and the elasticity of the rubber gasket will be gradually eroded due to heat and chemicals, which will accelerate the aging process of the sealing gasket and shorten the service life of the sealing gasket. Ultimately, the sealing gasket will lose its function, which will affect the normal use of the equipment. The above phenomena undoubtedly expose the defects of the conventional sealing gaskets in high temperature and special environment. Therefore, the application range of plate heat exchanger is limited.

[0004] Therefore, the improvement of the sealing gasket of plate heat exchanger has become a technical problem that needs to be solved in this field. INVENTION CONTENTS

[0005] The utility model aims at providing a sealing gasket for plate heat exchanger and plate heat exchanger, which can effectively improve the high temperature resistance, corrosion resistance, sealing performance, environmental safety and economy of the sealing gasket and plate heat exchanger, and significantly broaden the application range of plate heat exchanger.

[0006] The technical scheme of the utility model is as follows:

[0007] A sealing gasket for plate heat exchanger, which is divided into a straight edge sealing area, an angle hole sealing area and a two-way sealing area, and the cross section of the sealing gasket is rectangular. The compression ratio of the sealing gasket is 7-17%.

[0008] A plate heat exchanger, which comprises a fixed clamping plate, a movable clamping plate and a plate sheet clamped between the fixed clamping plate and the movable clamping plate, and a sealing gasket is arranged in the sealing groove of the plate sheet. The sealing gasket is the sealing gasket described above.

[0009] The utility model discloses beneficial effect:

[0010] 1, the cross section of the sealing gasket of the application is rectangular shape, and the thickness is 2.7-5.0mm. The compression ratio is 7-17%, adopts laser cutting processing shaping, and the sealing gasket is the non-asbestos rubber material, the sealing gasket bears the highest temperature 250 DEG C, can resist various high-strength acid, alkali and other corrosive medium, the maximum pressure bearing 1.6Mpa, and the sealing performance is good, and the mechanical strength is high, has very good tensile property, and is not easy to break and deform.

[0011] 2, the application breaks the conventional and traditional concept, overcomes the technical prejudice in the industry, changes the original hexagonal section into rectangular section to the sealing gasket section shape, changes the vulcanized rubber gasket through mould into laser cutting processing sealing gasket to the processing method, combines the oil-resistant non-asbestos rubber gasket with the plate heat exchanger organically, creates the application precedent of plate heat exchanger, receives the unexpected technical effect, makes the utility model have substantial characteristics. And have the superior temperature resistance and corrosion resistance, the pressure bearing capacity is extraordinary, non-toxic, safe and environment-friendly, the preparation process is simple, and the dismounting and cleaning are convenient, and the application range is wide, and the remarkable progress such as. DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only the embodiment of the utility model, and for ordinary skilled person in the art, under the premise of not creating the creative labor, other drawings can also be obtained according to the provided drawing.

[0013] Figure 1 It is the structure schematic diagram of the plate heat exchanger of the application.

[0014] Figure 2 It is the plate structure schematic diagram of the plate heat exchanger of the application.

[0015] Figure 3 It is the structure schematic diagram of the sealing gasket for the plate heat exchanger of the application.

[0016] Figure 4 It is the installation cross section schematic diagram of the sealing gasket and the plate sealing groove for the plate heat exchanger of the application.

[0017] Figure 5 It is the cross section schematic diagram of the sealing gasket for the plate heat exchanger of the application.

[0018] Figure 6 It is the plate sealing groove cross section schematic diagram of the plate heat exchanger.

[0019] Figure 7 It is the installation schematic diagram of the hexagonal rubber sealing gasket and the plate sealing groove in the prior art.

[0020] Reference signs:

[0021] Fixed clamping plate 1; movable clamping plate 2; plate piece 3; sealing gasket 4, sealing groove 31; one sealing straight edge area 41; one sealing angle hole area 42; two sealing areas 43.

[0022] Prior art:

[0023] Hexagonal rubber sealing gasket 100; plate sealing groove 200. DETAILED DESCRIPTION

[0024] The utility model discloses a special environment-friendly sealing gasket and the plate heat exchanger applied, which can effectively improve the high-temperature resistance, corrosion resistance, sealing property, environmental safety and economy of the sealing gasket and the plate heat exchanger, significantly broaden the application range of the plate heat exchanger, and solve the problems existing in the prior art.

[0025] It should be noted that in the description of the present application, the terms "inner", "outer", "upper", "lower" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] As shown in Figure 1 A plate heat exchanger, comprising a fixed clamping plate 1, a movable clamping plate 2, and a plate piece 3 clamped between the movable clamping plate and the fixed clamping plate, a sealing gasket 4 is mounted in the sealing groove of the plate piece 3, and the sealing gasket is any one of the following sealing gaskets.

[0028] As shown in Figure 3 The utility model discloses a sealing gasket 4 for plate heat exchanger of temperature -resistant corrosion -resistant, divide into one sealing straight edge area 41, one sealing angle hole area 42 and two sealing areas 43, the cross section of sealing gasket is rectangle. The compression ratio of the manufacturing material of sealing gasket 4 is 7-17%. Sealing gasket 4 is preferably made of oil -resistant asbestos -free rubber plate.

[0029] In use, the sealing gasket is installed in the sealing groove of the plate, and the size of the sealing gasket and the size of the sealing groove are required as follows: the width of the sealing gasket is the same as the lower bottom width of the plate sealing groove 31, and the height of the sealing gasket 4 is greater than 0.2-0.5mm than the depth of the plate sealing groove 31.

[0030] According to the size of the existing plate heat exchanger, the thickness of the sealing gasket 4 is basically in the range of 2.7-5.0mm.

[0031] The material selection of the sealing gasket:

[0032] The design and manufacturing method of the conventional sealing gasket in the prior art and the environmental protection also have many hidden dangers and deficiencies, which have an impact on the appearance and internal quality of the equipment, and directly restrict the survival and development of enterprises. The material of the sealing gasket of the present application adopts a material with a compression ratio of 7-17%, and in the experimental example, an oil-resistant non-asbestos rubber plate is selected. The oil-resistant non-asbestos rubber plate can be prepared by the following method: using a higher content of aramid fiber and artificial rock wool (sepiolite) as reinforcing material (i.e. filler), using natural rubber, styrene-butadiene or NBR as adhesive, and using organic and inorganic fibers as framework, the oil-resistant non-asbestos rubber plate is specially prepared by rolling method, which is 100% free of asbestos and has superior comprehensive performance. The sealing gasket can withstand a maximum temperature of 250℃ and can resist various high-strength acids, alkalis and other corrosive media. The sealing gasket has good sealing performance and can withstand a maximum pressure of 1.6Mpa.

[0033] The sealing gasket has high mechanical strength and good tensile resistance, and is not easy to break and deform.

[0034] Sealing gasket design:

[0035] According to different working conditions, different heat exchange areas, different plate sizes, different plate sealing groove depths and groove bottom sizes, the design size of the sealing gasket is controlled in the compression ratio and completely matches the plate sealing groove, and the specific design scheme is shown in the following figure:

[0036] 1), attached Figure 2 , attached Figure 3 are schematic diagrams of the plate and the sealing gasket of the plate heat exchanger, respectively; Figure 4 is a schematic diagram of the installation of the rectangular sealing gasket of the present application and the plate sealing groove; Figure 7 is a schematic diagram of the installation of the original hexagonal rubber sealing gasket 100 and the plate sealing groove 200.

[0037] 2), attached Figure 6 is a schematic diagram of the cross section of the plate sealing groove, the bottom width size X is controlled between 6-10mm, the height size H is between 2.5-5mm, and the height tolerance is ±0.10-±0.25mm.

[0038] 3), attachedFigure 5 For sealing gasket cross section profile, A is rectangular section bottom size, S is rectangular section height size.

[0039] 4), the sealing groove of the plate and the sealing gasket are matched in size: X=A, S=H+(0.2-0.5)mm,

[0040] 5), the compression ratio of the sealing gasket is controlled between 7% and 17%.

[0041] 6), the height size S of the non-asbestos rubber plate sealing gasket can be ignored.

[0042] Sealing gasket processing:

[0043] The oil-resistant non-asbestos rubber plate is cut by laser to form the shape of the sealing gasket. It is environmentally friendly and has no harmful substances.

[0044] Bonding:

[0045] The finished sealing gasket is bonded in the corresponding sealing groove of the plate in the assembly sequence, without distortion and deviation.

[0046] Assembly:

[0047] The plate gasket bonding assembly is hung on the frame in turn, and the clamping bolt is clamped to form a plate heat exchange equipment.

[0048] Compared with the prior art, the sealing gasket of the present application has the following advantages and positive effects:

[0049] 1. Overcome technical bias: the sealing gasket is generally considered by technical personnel in the field that its sealing line is complex and irregular, the cross section profile must be designed as a hexagonal plane, and the rubber gasket must be formed by mold vulcanization. Break the conventional and traditional concept, overcome the technical bias in the industry, the gasket cross section profile is designed as a rectangular shape, the compression ratio (7-17%) is strictly controlled, the rectangular bottom size and height size are matched with the plate, and the two are highly matched. After the plate is bonded with the plate by the sealing gasket, the plate bundle is assembled, and after the field experiment, unexpected technical effects are obtained, the performance indicators are greatly improved, the application of rectangular profile sealing of plate heat exchanger is created, and the utility model has substantial features.

[0050] 2、The preparation process is simple, the assembly appearance is neat, and the disassembly and cleaning are convenient: the previous hexagonal rubber sealing gasket manufacturing method is to design and manufacture a sealing gasket mold, and then prepare rubber raw materials and various additives, plasticizers, vulcanizing agents and other auxiliary materials, and the gasket is completed through multiple processes such as mixing, plasticizing, sheet pressing and profiling, vulcanization and cooling cutting. Due to the complex process, the cumulative error is too much, and the gasket quality is difficult to guarantee, especially the gasket thickness tolerance, the fluctuation is very large, the overall thickness is thick or thin, and the gasket point tolerance fluctuation is also large, which affects the overall quality of the equipment after installation. The utility model is to cut the oil-resistant non-asbestos rubber plate into sealing gaskets of different sizes by laser cutting, the surface is flat, and one plate can be cut into different sizes. Since the plate thickness tolerance is very small (negligible), the gasket is used to bond the plate to form a plate bundle assembly, and the clamping force is uniform, which overcomes the problems of uneven appearance, plate sealing groove deformation and other problems affecting the appearance quality of the product. The utility model improves the overall external and internal quality of the equipment, and has the advantages of simple preparation process, convenient cleaning and reduced manufacturing cost.

[0051] 3、The pressure capacity is super-normal: the compression ratio of the rectangular sealing gasket is small (the compression rate is 7-17%), the rebound rate is limited, and the deformation is not easy. The utility model makes use of this feature to withstand the internal fluid pressure of the plate heat exchanger, and at the same time increases the clamping force. The rectangular sealing gasket is installed and pressed in the V series plate heat exchanger once, and no leakage is found at 1.6 MPa. Compared with the prior art, it is improved by at least 0.6 MPa, and repeated disassembly and assembly of the plate do not produce deformation (have no adverse effects on the plate). Thus, it is further proved that the hard sealing rectangular structure gasket brings new life to the plate heat exchanger.

[0052] 4、The temperature resistance and corrosion resistance are superior: the use temperature of the application can reach 250 DEG C, which is improved by 70-140 DEG C compared with the existing plate heat exchanger, and due to the unique organization structure of the rectangular sealing gasket, it will not age or become brittle at high temperature, so it can maintain high sealing performance and stable mechanical properties, and also has good sealing performance in the fluid vibration process.

[0053] Due to the limited use temperature of conventional sealing gaskets, tube heat exchangers or fully welded plate heat exchangers must be used in high-temperature working conditions, which increases the equipment manufacturing cost invisibly, and once the equipment is blocked, it cannot be disassembled. The utility model can withstand high temperature and high pressure working conditions, and can also use the anti-adhesive layer on the gasket to make disassembly and cleaning more convenient. In addition, the rectangular gasket performs well in harsh chemical environments, can resist the corrosion of acid, alkali and solvent, ensures the normal operation of the equipment, avoids potential leakage risks, and reduces the failure rate.

[0054] 5、The rectangular gasket material of the present application is oil-resistant non-asbestos rubber plate, which has the characteristics of small elasticity, small resilience, small compression ratio, no asbestos, no toxic and irritating odor, no combustible material, no harm to human body and environment, safety and environmental protection.

[0055] 6、The application range is more extensive: through the organic combination of the advantages of the rectangular sealing gasket and the unique characteristics of the plate heat exchanger plate, the application field of the plate heat exchanger is further widened. The present application has good temperature resistance, pressure resistance, oil resistance, medium resistance and air tightness, so it has wide applicability. It is widely used in power generation, metallurgy, shipbuilding, petrochemical industry and other industries, especially suitable for the heat exchange of water, steam, oil, industrial corrosive acid, alkali, food raw materials, vitamin and other media, and the sealing gasket can resist various chemical media, and is fully used in various working conditions such as synthetic oil / fat, alcohol, gasoline, solvent, coolant, antifreeze, salt, etc., and has broad development prospects.

[0056] The above describes the present application and its embodiments in a schematic manner, which is not limited, and the drawings shown are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, and designs similar structure and implementation according to the technical essence of the present application without departing from the technical solution content of the present application, all of the above should belong to the protection scope of the present application.

Claims

1. A kind of sealing gasket for temperature-resistant and corrosion-resistant plate heat exchanger, divided into one straight edge sealing area, one sealing corner hole area and two sealing areas, characterized by: The cross section of the gasket is rectangular.

2. The temperature and corrosion resistant gasket for plate heat exchangers according to claim 1, characterized in that: The compression ratio of the gasket is 7-17%.

3. The temperature and corrosion resistant gasket for plate heat exchangers according to claim 2, characterized in that: The gasket is made of oil-resistant non-asbestos rubber sheet or non-asbestos rubber sheet.

4. The temperature and corrosion resistant gasket for plate heat exchangers according to claim 1 or 2, characterized in that: The height of the gasket is greater than 0.2-0.5mm than the depth of the sheet sealing groove.

5. The temperature and corrosion resistant gasket for plate heat exchangers according to claim 4, characterized in that: The width of the gasket is the same as the lower bottom width of the sheet sealing groove.

6. The temperature and corrosion resistant gasket for plate heat exchangers according to claim 4, characterized in that: The height of the gasket is 2.7-5.0mm.

7. A plate heat exchanger comprising a fixed clamping plate, a movable clamping plate and plate pieces clamped between the fixed clamping plate and the movable clamping plate, a sealing gasket being arranged in a sealing groove of the plate pieces, characterized in that: The gasket is any one of the gaskets of claims 1-6.

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