Waterproof sealing ring of inverter control box

Abstract

The invention relates to the technical field of photovoltaic product accessories, in particular to an inverter control box waterproof sealing ring which comprises a sealing ring body, a U-shaped groove and a groove are formed in the surfaces of the two sides of the sealing ring body respectively, and the depth of the U-shaped groove is larger than that of the groove; the sealing ring is provided with the U-shaped groove and the groove, the inside and the outside of the section of the sealing ring are inclined planes, and the inside of the U-shaped groove is streamlined, so that the sealing ring is convenient to mount, the contact surface of the sealing ring and a mounting body is effectively increased, the leakage distance is prolonged, meanwhile, the deformation is reduced in the mounting and using processes of the sealing element, and the service life of the sealing element is prolonged; in addition, the sealing ring is made of a mixture of nitrile rubber buna and chloroprene rubber, so that the sealing ring has good weather resistance, aging resistance, high temperature resistance and deformation resistance, the service life of the sealing ring is further prolonged, the waterproof performance of the sealing ring is further improved, and the cost of photovoltaic engineering in sealing implementation can be saved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic product accessories, in particular to a waterproof sealing ring for an inverter control box. Background Art

[0002] The inverter is a very important component in photovoltaic power generation. Photovoltaic power generation produces low-voltage direct current, and the power loss during transmission is very large. The inverter can convert direct current into alternating current, and then perform voltage boost transmission to achieve the purpose of long-distance low-loss transmission. The inverter controller protects the inverter to work safely. It is located outdoors in a harsh environment. To work normally, its outer packaging box must meet the IP7 or higher waterproof level for a long time, and the box cover must be easy to open and close. The controller box cover and the body are made of high-performance PC materials. In order to ensure a waterproof level of IP7 or above, a long-life sealing ring is required at the joint between the two. The structure of the sealing ring directly affects the convenient installation and service life of the sealing ring.

[0003] Traditional sealing ring cross-section structure style Figure 1 As shown, the usage status of the traditional sealing ring is as follows Figure 2 As shown, the sealing principle of the rubber sealing ring is to make the rubber produce elastic deformation through extrusion force to achieve a leakage-free gap and realize the sealing effect. On the one hand, the rubber sealing ring will gradually undergo permanent deformation under long-term stress deformation and adverse climatic conditions, and gradually lose its sealing performance. The greater the stress deformation, the greater the permanent deformation will be, and the faster the sealing performance will be lost, that is, the shorter the sealing life. On the other hand, the force applied to the sealing ring by the box cover and the box body and the rebound force of the sealing ring interact and are equal. The box cover and the box body will change after being subjected to the reaction force. Both style A and style B require a large extrusion force and a large deformation to achieve the IP7 waterproof grade. The sealing ring is prone to permanent deformation, and the installation box is also prone to deformation, which eventually leads to sealing failure, that is, a short sealing life. Therefore, traditional sealing sealing rings have a short service life during use, and poor weather resistance and aging resistance. At the same time, traditional rubber does not have high temperature resistance, which is also one of the reasons for the shortened service life of the sealing ring. Summary of the invention

[0004] The object of the present invention is to provide a waterproof sealing ring for an inverter control box, which has good weather resistance, aging resistance, high temperature resistance and deformation resistance.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an inverter control box waterproof sealing ring, comprising a sealing ring body, wherein the two side surfaces of the sealing ring body are respectively provided with a U-shaped groove and a groove, and the depth of the U-shaped groove is greater than the depth of the groove.

[0006] A method for processing a waterproof sealing ring of an inverter control box, the processing method comprising the following steps:

[0007] Step S1, weighing 100-110 parts of unvulcanized rubber compound, 4-8 parts of antioxidant, 1.2-3.5 parts of vulcanizing agent, 18.5-23.5 parts of filler, 8-12 parts of plasticizer, 0.3-0.6 parts of scorch retarder, 0.9-1.3 parts of stearic acid and 1.5-2.2 parts of accelerator, putting the unvulcanized rubber compound into a mixing device, and pre-stirring the unvulcanized rubber compound at a stirring speed of 100-120 r / min, and setting the pre-stirring temperature at 75-85° C.;

[0008] Step S2, after pre-stirring for 5-13 minutes, adding antioxidant, vulcanizing agent, filler, plasticizer, anti-scorch agent, stearic acid and accelerator in sequence, and continuing to stir the materials at a stirring speed of 110-120r / min for 30-60 minutes. After stirring, standing the mixture in the mixing equipment, waiting for the mixture to expand, unloading, and then cooling the unloaded materials to obtain a nitrile rubber mixture;

[0009] Step S3, weighing 76-82 parts of a nitrile rubber mixture and 18-22 parts of chloroprene rubber, chopping and granulating the nitrile rubber mixture and the chloroprene rubber, and putting them into a mixing device for mixing, wherein the stirring speed during the mixing process is controlled at 105-130 r / min and the temperature is 115-130° C. After the mixing is completed, a mixture of nitrile rubber and chloroprene rubber is obtained;

[0010] Step S4, chopping the obtained nitrile rubber and chloroprene rubber mixture into particles, and feeding them into a rubber extruder, the outlet of the rubber extruder is connected to a sealing ring manufacturing mold, the nitrile rubber and chloroprene rubber mixture is extruded into the sealing ring manufacturing mold, and the nitrile rubber and chloroprene rubber mixture in the mold is cooled and demolded to obtain a sealing ring body.

[0011] Preferably, in step S1, the antioxidant is phenylnaphthylamine, ketoamine antioxidant or diphenylamine derivative, the vulcanizing agent is a resin vulcanizing agent, the filler is rubber powder, regenerated rubber, shellac or cellulose, and the plasticizer is a petroleum plasticizer, a coal tar plasticizer or a pine oil plasticizer.

[0012] Preferably, in step S1, the scorch retarder is a nitroso compound, an organic acid or a thioimide, and the accelerator is a thiolbenzothiazole, tetramethylthiuram disulfide or tetramethylthiuram disulfide.

[0013] Preferably, in step S1, the pressure of the pressure roller in the mixing equipment is set to 45-55N.

[0014] Preferably, in step S2, after adding the antioxidant and the vulcanizing agent, the temperature of the mixing equipment is set at 110-120°C.

[0015] Preferably, in step S2, the mixture in the mixing device is left to stand for 1-2 hours, and the mixture after feeding is cooled by air cooling, and the wind speed of the air cooling is 0.3-0.4 m / s.

[0016] Preferably, in step S3, the pressure of the pressure roller in the mixing equipment is 30-40N.

[0017] Preferably, in step S3, the particle size of the nitrile rubber mixture and the chloroprene rubber after being shredded is 3-6.5 mm.

[0018] Preferably, in step S4, the body temperature of the rubber extruder is set at 120-135°C, and the outlet temperature of the rubber extruder is 113-120°C.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The sealing ring proposed by the present invention is provided with a U-shaped groove and a groove, and its cross section adopts inclined surfaces inside and outside, and the U-shaped groove is streamlined, which is not only convenient for installation, but also effectively increases the contact surface between the sealing ring and the installation body, prolongs the leakage distance, and reduces the deformation amount during the installation and use of the sealing component, prolongs the service life of the sealing component. In addition, the sealing ring is made of a mixture of nitrile rubber and chloroprene rubber, so that the sealing ring has good weather resistance, aging resistance, high temperature resistance and deformation resistance, further improves the service life and waterproof performance of the sealing ring, and can also save the cost of implementing sealing work in photovoltaic projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional structural style diagram of a traditional sealing ring for easy installation;

[0022] Figure 2 This is a schematic diagram of a traditional sealing ring during installation and use;

[0023] Figure 3 This is a structural diagram of the sealing ring in the present invention;

[0024] Figure 4 It is a schematic diagram of the sealing ring of the present invention when it is installed and used.

[0025] In the figure: 1. Sealing ring body; 2. U-shaped groove; 3. Groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-4 The inverter control box waterproof seal includes a seal body 1. The two side surfaces of the seal body 1 are respectively provided with a U-shaped groove 2 and a groove 3. The depth of the U-shaped groove 2 is greater than the depth of the groove 3. The cross section of the seal is inclined inside and outside. The U-shaped groove 2 is streamlined inside, which is convenient for installation. At the same time, it effectively increases the contact surface between the seal and the installation body, and extends the leakage distance. After installation, the seal is naturally subjected to extrusion pressure in the up and down and left and right directions (the force in the traditional left and right directions is mainly through the extrusion of the up and down forces, which deforms the seal and then generates left and right lateral forces). Compared with the traditional style, when the same waterproof level is achieved, the extrusion force required in the up and down directions can be reduced, which can effectively reduce the force deformation of the installation part and further improve the waterproof level. When the same waterproof level is achieved, the deformation of the seal is reduced during installation and use, which effectively extends the service life of the seal.

[0028] Embodiment 1:

[0029] A method for processing a waterproof sealing ring of an inverter control box, the processing method comprising the following steps:

[0030] Step S1, weighing 100 parts of unvulcanized rubber compound, 4 parts of antioxidant, 1.2 parts of vulcanizing agent, 18.5 parts of filler, 8 parts of plasticizer, 0.3 parts of scorch retarder, 0.9 parts of stearic acid and 1.5 parts of accelerator, putting the unvulcanized rubber compound into a mixing device, pre-stirring the unvulcanized rubber compound at a stirring speed of 100 r / min, and setting the pre-stirring temperature at 75° C., wherein the antioxidant is phenylnaphthylamine, ketoamine antioxidant or diphenylamine derivative, the vulcanizing agent is a resin vulcanizing agent, the filler is rubber powder, reclaimed rubber, shellac or cellulose, and the plasticizer is a petroleum plasticizer, a coal tar plasticizer or a pine oil plasticizer;

[0031] Step S2, after pre-stirring for 5 minutes, adding antioxidant, vulcanizing agent, filler, plasticizer, anti-scorch agent, stearic acid and accelerator in sequence, after adding antioxidant and vulcanizing agent, setting the temperature of the mixing equipment to 110°C, and continuing to stir the material at a stirring speed of 110r / min for 30 minutes, after stirring, leaving the mixture in the mixing equipment to stand, waiting for the mixture to expand, unloading, and then cooling the unloaded material to obtain a nitrile rubber mixture;

[0032] Step S3, weighing 76 parts of a nitrile rubber mixture and 18 parts of chloroprene rubber, chopping and granulating the nitrile rubber mixture and the chloroprene rubber, the size of the chopped particles is 3 mm, and putting them into a mixing device for mixing, the stirring speed during the mixing process is controlled at 105 r / min, the temperature is 115° C., and after the mixing is completed, a mixture of nitrile rubber and chloroprene rubber is obtained;

[0033] Step S4, chopping the obtained nitrile rubber and chloroprene rubber mixture into particles, and feeding them into a rubber extruder, wherein the body temperature of the rubber extruder is set at 120°C, the outlet temperature of the rubber extruder is 113°C, the outlet of the rubber extruder is connected to a sealing ring manufacturing mold, and the nitrile rubber and chloroprene rubber mixture is extruded into the sealing ring manufacturing mold, and the nitrile rubber and chloroprene rubber mixture in the mold is cooled and demolded to obtain a sealing ring body 1.

[0034] Embodiment 2:

[0035] A method for processing a waterproof sealing ring of an inverter control box, the processing method comprising the following steps:

[0036] Step S1, weighing 1110 parts of unvulcanized rubber compound, 8 parts of antioxidant, 3.5 parts of vulcanizing agent, 23.5 parts of filler, 12 parts of plasticizer, 0.6 parts of scorch retarder, 1.3 parts of stearic acid and 2.2 parts of accelerator, putting the unvulcanized rubber compound into a mixing device, pre-mixing the unvulcanized rubber compound at a stirring speed of 120 r / min, and setting the pre-mixing temperature at 85° C. The pressure is set to 55N, wherein the antioxidant is phenylnaphthylamine, ketoamine antioxidant or diphenylamine derivative, the vulcanizing agent is a resin vulcanizing agent, the filler is rubber powder, regenerated rubber, shellac or cellulose, the plasticizer is a petroleum plasticizer, a coal tar plasticizer or a pine oil plasticizer, the scorch retarder is a nitroso compound, an organic acid or thioimide, and the accelerator is mercaptobenzothiazole, tetramethylthiuram disulfide or tetramethylthiuram disulfide;

[0037] Step S2, after pre-stirring for 5-13 minutes, adding antioxidant, vulcanizing agent, filler, plasticizer, anti-scorch agent, stearic acid and accelerator in sequence, after adding antioxidant and vulcanizing agent, setting the temperature of the mixing equipment to 120°C, and continuing to stir the material at a stirring speed of 120r / min for 60 minutes, after stirring, standing the mixture in the mixing equipment, standing the mixture for 2 hours, waiting for the mixture to expand, and then unloading the material, and then cooling the unloaded material, and cooling the unloaded mixture by air cooling, the wind speed of the air cooling is 0.4m / s, to obtain a nitrile rubber mixture;

[0038] Step S3, weighing 82 parts of a nitrile rubber mixture and 22 parts of chloroprene rubber, chopping and granulating the nitrile rubber mixture and the chloroprene rubber, the size of the chopped particles is 6.5 mm, and putting them into a mixing device for mixing, the stirring speed during the mixing process is controlled at 130 r / min, the temperature is 120° C., the pressure of the pressure roller in the mixing device is 40 N, and after the mixing is completed, a mixture of nitrile rubber and chloroprene rubber is obtained;

[0039] Step S4, chopping the obtained nitrile rubber and chloroprene rubber mixture into particles, and putting them into a rubber extruder, the body temperature of the rubber extruder is set at 135° C., the outlet temperature of the rubber extruder is 120° C., the outlet of the rubber extruder is connected to a sealing ring manufacturing mold, the nitrile rubber and chloroprene rubber mixture is extruded into the sealing ring manufacturing mold, the nitrile rubber and chloroprene rubber mixture in the mold is cooled and demolded, and a sealing ring body 1 is obtained. The sealing ring is made of a mixture of nitrile rubber and chloroprene rubber, so that the sealing ring has good weather resistance, aging resistance, high temperature resistance and deformation resistance, and further improves the service life and waterproof performance of the sealing ring.

[0040] The following experiments were conducted on the performance of the sealing ring made of a mixture of nitrile rubber and chloroprene rubber in the present invention and other common material sealing rings, and the following table (Table 1) was obtained.

[0041] Table 1

[0042]

[0043]

[0044] In the table above, the negative signs of the physical properties are sorted from worst to best. ╳ , △ , ○ , ○△ , ◎ , ◎○ ; It can be seen that the sealing ring made of a mixture of nitrile rubber and chloroprene rubber has the best ozone resistance, wear resistance, excellent deformation resistance and water tightness, and also has high temperature resistance and low temperature resistance, so that the sealing ring has a longer service life. At the same time, the style of the sealing ring is designed for the inverter control box, according to IP 7 level and 10 years of life. Compared with the traditional style, the sealing cost of each box body has been reduced. The more important benefit is that the new style is also applicable to other box body sealing designs with higher waterproof levels.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof sealing ring for an inverter control box, comprising a sealing ring body (1), characterized in that: The two side surfaces of the sealing ring body (1) are respectively provided with a U-shaped groove (2) and a groove (3), and the depth of the U-shaped groove (2) is greater than the depth of the groove (3).

2. The waterproof seal ring of the inverter control box according to claim 1, characterized in that: The processing method includes the following steps: Step S1, weighing 100-110 parts of unvulcanized rubber compound, 4-8 parts of antioxidant, 1.2-3.5 parts of vulcanizing agent, 18.5-23.5 parts of filler, 8-12 parts of plasticizer, 0.3-0.6 parts of scorch retarder, 0.9-1.3 parts of stearic acid and 1.5-2.2 parts of accelerator, putting the unvulcanized rubber compound into a mixing device, and pre-stirring the unvulcanized rubber compound at a stirring speed of 100-120 r / min, and setting the pre-stirring temperature at 75-85° C.; Step S2, after pre-stirring for 5-13 minutes, adding antioxidant, vulcanizing agent, filler, plasticizer, anti-scorch agent, stearic acid and accelerator in sequence, and continuing to stir the materials at a stirring speed of 110-120r / min for 30-60 minutes. After stirring, standing the mixture in the mixing equipment, waiting for the mixture to expand, unloading, and then cooling the unloaded materials to obtain a nitrile rubber mixture; Step S3, weighing 76-82 parts of a nitrile rubber mixture and 18-22 parts of chloroprene rubber, chopping and granulating the nitrile rubber mixture and the chloroprene rubber, and putting them into a mixing device for mixing, wherein the stirring speed during the mixing process is controlled at 105-130 r / min and the temperature is 115-130° C. After the mixing is completed, a mixture of nitrile rubber and chloroprene rubber is obtained; Step S4, chopping the obtained nitrile rubber and chloroprene rubber mixture into particles, and feeding the particles into a rubber extruder. The outlet of the rubber extruder is connected to a sealing ring manufacturing mold, and the nitrile rubber and chloroprene rubber mixture is extruded into the sealing ring manufacturing mold. The nitrile rubber and chloroprene rubber mixture in the mold is cooled and then demolded to obtain a sealing ring body (1).

3. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In step S1, the antioxidant is phenylnaphthylamine, ketoamine antioxidant or diphenylamine derivative, the vulcanizing agent is a resin vulcanizing agent, the filler is rubber powder, regenerated rubber, shellac or cellulose, and the plasticizer is a petroleum plasticizer, a coal tar plasticizer or a pine oil plasticizer.

4. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In the step S1, the scorch retarder is a nitroso compound, an organic acid or a thioimide, and the accelerator is a thiolbenzothiazole, tetramethylthiuram disulfide or tetramethylthiuram disulfide.

5. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In the step S1, the pressure of the pressure roller in the mixing equipment is set to 45-55N.

6. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In the step S2, after adding the antioxidant and the vulcanizing agent, the temperature of the mixing equipment is set at 110-120°C.

7. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In the step S2, the mixture in the mixing device is left to stand for 1-2 hours, and the mixture after being discharged is cooled by air cooling, and the wind speed of the air cooling is 0.3-0.4 m / s.

8. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In the step S3, the pressure of the pressure roller in the mixing equipment is 30-40N.

9. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In step S3, the particle size of the nitrile rubber mixture and the chloroprene rubber after being chopped is 3-6.5 mm.

10. The waterproof seal ring of the inverter control box according to claim 2, characterized in that: In step S4, the body temperature of the rubber extruder is set at 120-135°C, and the outlet temperature of the rubber extruder is 113-120°C.

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