Waterproof reverse osmosis control method for electric heating port structure of water tank

Abstract

The present invention proposes a waterproof reverse osmosis control method for an electric heating port structure of a water tank, which belongs to the technical field of water tank manufacturing. The protective cover comprises a second protective cover and a first protective cover which are matched and connected in sequence with the orifice. The raised edges around the outer side of the second protective cover are bent to form a second bent portion. The two side edges and the lower end of the second bent portion extend in three directions to form three wing pieces. The raised edge of the middle of the first protective cover is bent outward to form a first bent portion. The four sides of the first bent portion extend outward and are connected to form a fitting portion. The two corners of the upper end of the fitting portion are both provided with a first notch, and the two corners of the lower end of the fitting portion are both provided with a first through hole. The lower end of the fitting portion is connected to the screw hole at the groove by penetrating the first through hole through a fastener to realize the compression of the second protective cover. The production is guided by measuring the wing angle and the fastener pressure to ensure that the reverse osmosis rate of the orifice protective cover meets the design requirements.

Description

Technical Field

[0001] The invention relates to the technical field of water tanks, and in particular to a waterproof reverse osmosis control method for an electric heating port structure of a water tank. Background Art

[0002] The inner tank of the closed electric water heater is sealed, and the water pressure in the water tank is very high. Its inner tank is pressure-resistant and can supply water in multiple ways. It can be used for showering, bathing, laundry, washing vegetables, etc. The storage electric water heater can automatically keep the temperature constant and can still supply hot water during power outages. It does not need to be installed in separate rooms, does not produce harmful gases, is clean and hygienic, and can be easily adjusted in temperature. However, the electric heating port on the outer cylinder of the water tank needs to be sealed to prevent water or other debris from entering. The protective cover is usually installed on the orifice of the outer cylinder body with screws. The protective cover is provided with a wing of PE material. At this time, the sealing of the contact surface between the wing and the orifice is the sealing of PE to metal, which is achieved by giving the protective cover a certain pre-tightening force by the screw to make the protective cover contact with the orifice. As a basic sealing connector, its reverse osmosis rate and assembly characteristics will directly affect the use of the product. However, the traditional sealing wing is at right angles to the bent portion, and the screw pressure is not measured. The installation of the screw is relatively random, which is prone to problems such as poor sealing or sealing failure. Summary of the invention

[0003] The object of the present invention is to provide a waterproof reverse osmosis control method for a water tank electric heating port structure, so as to solve the problem of poor sealing or sealing failure in the prior art mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A waterproof reverse osmosis control method for a water tank electric heating port structure, the water tank comprises a box body, the box body is provided with an electric heating port, the electric heating port is a rectangular orifice, the interior of the orifice is an inner cavity of the water tank, a groove is arranged around the orifice, screw holes are arranged on the left and right sides of the bottom of the groove, the groove is used to insert a protective cover, the protective cover comprises a second protective cover and a first protective cover which are sequentially matched and connected with the orifice, the convex edges around the outer side of the second protective cover are bent to form a second bending portion, the two side edges and the lower end of the second bending portion extend in three directions to form three wing pieces, the convex edge of the middle of the first protective cover is bent outward to form a first bending portion, the four sides of the first bending portion extend outward and are connected to form a fitting portion, the two corners of the upper end of the fitting portion are both provided with a first notch, the two corners of the lower end of the fitting portion are both provided with a first through hole, the lower end of the fitting portion is penetrated by a fastener to form the first through hole and connected with the screw hole at the groove, so as to realize the pressing of the second protective cover;

[0006] The waterproof reverse osmosis control method is to realize waterproof reverse osmosis according to the connection and sealing of each structure at the orifice groove of the electric heating port, which is specifically determined by the force of the fastener on the protective cover and the design requirements of the wing. The thickness of the wing is set to t, the width is set to B, and the elastic modulus is set to E. Under the action of the fastener, the fitting portion squeezes and fixes the wing in the groove. The force of the fastener is set to F. The sealing area of ​​the orifice protective cover is the contact surface between the second bending portion and the side of the groove and the contact surface between the wing and the bottom of the groove. Since the force F of the fastener is perpendicular to the bottom surface of the groove and is directed downward, The contact surface between the wing and the bottom of the groove becomes the key area that mainly bears the sealing pressure, and the shear stress generated by the contact surface between the second bent portion and the side of the groove under the force F of the fastener makes its contact surface unable to withstand long-term sealing pressure, so the sealing performance of the contact surface between the second bent portion and the side of the groove can be ignored. Therefore, the contact surface between the wing and the bottom of the groove is set as the effective sealing area, the angle between the wing and the contact surface of the bottom of the groove is set as the wing angle θ, the friction coefficient is set as μ1, the sealing circumference is set as L, and the reverse osmosis rate y of the water tank electric heating port structure satisfies the following formula:

[0007]

[0008] Among them, y is the reverse permeability rate, F is the force of the fastener, t is the thickness of the wing, B is the width of the wing, E is the elastic modulus of the wing, θ is the angle of the wing, L is the sealing circumference, μ1 is the friction coefficient, μ2 is the dynamic viscosity of the liquid, and the values ​​of a, b, and k are adjustment coefficients.

[0009] Furthermore, the water tank is a cylindrical body, a plug-in groove is provided at the top of the body opening, and the upper end of the fitting portion is plugged into the plug-in groove.

[0010] Furthermore, the wing angle θ is 0~60°.

[0011] Furthermore, the second bent portion extending to the left is a left wing piece, extending to the right is a right wing piece, and extending downward is a lower wing piece.

[0012] Furthermore, the bottom ends of the left and right wings are flush with the bottom end of the second protective cover, and their top ends extend beyond the top end of the second protective cover to form a U-shaped groove therewith; the two sides of the lower wing and the bottom ends of the left and right wings form a second notch.

[0013] Furthermore, an orifice flange is provided on the inner side of the groove.

[0014] Furthermore, a gasket is provided between the fastener and the first protective cover.

[0015] Furthermore, the first protective cover is made of stainless steel, and the second protective cover is made of PE.

[0016] In summary, the beneficial effects of the present invention are:

[0017] The waterproof reverse osmosis control method of the water tank electric heating port structure of the present invention uses a fastener to push the first protective cover toward the second protective cover and the orifice to form surface contact, and performs a force analysis on the contact surface. Since the contact surface between the wing and the bottom of the groove is mainly subjected to vertical pressure rather than shear stress, the contact surface is selected as the key area that mainly bears the sealing pressure to perform waterproof reverse osmosis control of the water tank electric heating port structure, which can provide a safer waterproof reverse osmosis control measure.

[0018] Specifically, the waterproof reverse osmosis control method of the present invention accurately calculates and predicts the reverse osmosis rate under different conditions by establishing a relationship between the reverse osmosis rate and parameters such as the wing angle, friction coefficient, and fastener force, thereby providing a theoretical basis for the structural design and optimization of the water tank electric heating port. By adjusting the force of the fastener, the pressure on the contact surface between the wing and the bottom of the groove is controlled to achieve waterproof reverse osmosis performance that meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the water tank of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of water tank electric heating port structure 500;

[0021] Figure 3 is a partial view of the fin and groove of the present invention;

[0022] Figure 4 is a schematic diagram of a first protective cover of the present invention;

[0023] Figure 5 is a schematic diagram of a second protective cover of the present invention;

[0024] Figure 6 is a functional relationship diagram of the screw force and the reverse osmosis rate according to a specific embodiment of the present invention;

[0025] Among them: 100-cylinder, 200-electric heating port, 210-hole, 220-groove, 230-flange, 240-screw hole, 300-first protective cover, 310-first bending portion, 320-fitting portion, 321-first notch, 322-first through hole, 323-fastener, 324-gasket, 400-second protective cover, 410-second bending portion, 420-wing, 421-second notch, 500-water tank electric heating port structure. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention, and cannot be used to limit the present invention.

[0027] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementations and variations thereof. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figures 1 to 5 As shown, a waterproof reverse osmosis control method of a water tank electric heating port structure 500, the water tank includes a box body, the box body is provided with an electric heating port 200, the electric heating port 200 is a rectangular opening 210, the interior of the opening 210 is the inner cavity of the water tank, a groove 220 is arranged around the opening 210, screw holes 240 are arranged on the left and right sides of the bottom of the groove 220, the groove 220 is used to insert a protective cover, the protective cover includes a second protective cover 400 and a first protective cover 300 which are matched and connected with the opening 210 in sequence, the raised edges around the outer side of the second protective cover 400 are bent to form a second bent portion 410, The two sides and the lower end of the second bending portion 410 extend in three directions to form three fins 420. The middle of the first protective cover 300 is bent toward the outer convex edge to form the first bending portion 310. The four sides of the first bending portion 310 extend outward and are connected to form a fitting portion 320. The two corners of the upper end of the fitting portion 320 are both provided with a first notch 321. The two corners of the lower end of the fitting portion 320 are both provided with a first through hole 322. The lower end of the fitting portion 320 is connected to the screw hole 240 at the groove 220 by penetrating the first through hole 322 through a fastener 323, so as to achieve the compression of the second protective cover 400.

[0029] The waterproof reverse osmosis control method is to realize waterproof reverse osmosis by sealing the connection of each structure at the orifice 210 and the groove 220 of the electric heating port 200, which is specifically determined by the force of the fastener 323 on the protective cover and the design requirements of the wing 420. The thickness of the wing 420 is set to t, the width is set to B, and the elastic modulus is set to E. Under the action of the fastener 323, the fitting portion 320 squeezes and fixes the wing 420 in the groove 220, and the force of the fastener 323 is set to F. The sealing area of ​​the orifice 210 protective cover is the contact surface between the second bending portion 410 and the side of the groove 220 and the contact surface between the wing 420 and the bottom of the groove 220. Since the force F of the fastener 323 is perpendicular to the groove 22 0 bottom surface and in a downward direction, so that the contact surface between the wing 420 and the bottom of the groove 220 becomes the key area that mainly bears the sealing pressure, and the shear stress generated by the contact surface between the second bent portion 410 and the side of the groove 220 under the force F of the fastener 323 makes its contact surface unable to withstand long-term sealing pressure, then the sealing performance of the contact surface between the second bent portion 410 and the side of the groove 220 can be ignored, so the contact surface between the wing 420 and the bottom of the groove 220 is set as the effective sealing area, the angle between the wing 420 and the contact surface between the bottom of the groove 220 is set as the wing angle θ, the friction coefficient is set as μ1, the sealing circumference is set as L, and the reverse osmosis rate y of the water tank electric heating port structure 500 satisfies the following formula:

[0030]

[0031] Among them, y is the reverse permeability rate, F is the force of the fastener, t is the thickness of the wing, B is the width of the wing, E is the elastic modulus of the wing, θ is the angle of the wing, L is the sealing circumference, μ1 is the friction coefficient, μ2 is the dynamic viscosity of the liquid, and the values ​​of a, b, and k are adjustment coefficients.

[0032] Combined with the current processing level, the thickness t of the PE material wing 420 ranges from 0.2 to 3 mm, the width ranges from 10 to 50 mm, and the elastic modulus E ranges from 800 to 1000 MPa. To ensure that the contact area between the wing 420 and the bottom of the groove 220 is large enough to form a stable sealing state, the wing angle θ of the contact surface between the wing 420 and the bottom of the groove 220 should be less than or equal to 60°, which is conducive to more evenly distributing the force of the fastener 323 (in this embodiment, the fastener 323 is a screw, the same below), reducing the possibility of concentrated stress points in the sealing area, and avoiding the pinching of the wing 420 and structural leakage.

[0033] In this specific embodiment, the first protective cover 300 and the second protective cover 400 are both rectangular panels of 150×300 mm, and a waterproof and dustproof PE sticker with a thickness t of 2 mm, a width B of 20 mm, and an elastic modulus of 800 MPa is used as the wing 420. The wing angle θ of the contact surface between the second protective cover 400 and the bottom of the groove 220 is processed to 15°, and the sealing circumference L of the contact surface between the wing 420 and the bottom of the groove 220 is L=2×(150+300)=900 mm. The water tank is made of 304 stainless steel, that is, the friction coefficient μ1 of the contact surface between the wing 420 and the bottom of the groove 220 is 0.3. The liquid in the water tank is water at a temperature of 20°C, and its dynamic viscosity μ2 is 1.0050. Based on the above design requirements, the adjustment coefficient a is 1.0158, b is 0.9996, and k is -362.36. The force F of the screw and the reverse osmosis rate y of the water tank electric heating port structure 500 satisfy the following formula:

[0034]

[0035] From the above formula, it can be obtained that when the screw force F is greater than 16600N, the reverse seepage rate exceeds 99%, meeting the design requirements.

[0036] By measuring the wing angle and the fastener pressure, it is found that the relationship between them is: when the wing angle is small, as the fastener pressure continues to increase, the contact area between the wing and the groove is larger, that is, the reverse osmosis rate is better; when the wing angle is large, as the fastener pressure continues to increase, the plastic deformation of the wing is large, and the contact area between the wing and the groove is smaller, that is, the reverse osmosis rate is poor.

[0037] Therefore, the wing angle should not be too large; at the same time, the surface of the wing and the groove must not be absolutely smooth, and contact alone cannot ensure complete sealing. From a microscopic level, there will still be tiny channels on the contact surface that cause leakage, and as the pressure of the fastener increases, the surface of the material will deform, making the gap between the rough surfaces fill more completely, and the wing and the groove will achieve complete contact, achieving the effect of sealing the leakage; but excessive pressure from the fastener will cause the edge of the wing to bulge or break, which will reduce the contact area and reduce the sealing ability. Therefore, the pressure of the fastener should not be too large.

[0038] The ultimate compressive strength of the PE wing in this specific embodiment is 18000N, so the screw force F should be in the range of 16600~18000N.

[0039] In actual production, the water tank is a cylindrical barrel 100, and a plug-in groove is provided at the top of the opening 210 of the barrel 100, and the upper end of the fitting portion 320 is plugged into the plug-in groove.

[0040] In actual production, the selected wing angle θ ranges from 0 to 60°.

[0041] like Figure 5 As shown, the left wing 420 extends to the left of the second bending portion 410, the right wing 420 extends to the right, and the lower wing 420 extends downward. The left wing 420, the right wing 420 and the lower wing 420 on the same protective cover have the same wing angle.

[0042] like Figure 5 As shown, the bottom ends of the left and right wings 420 are flush with the bottom end of the second protective cover 400, and the top ends thereof extend beyond the top end of the second protective cover 400 to form a U-shaped groove therewith; the two sides of the lower wing 420 and the bottom ends of the left and right wings 420 form a second notch 421.

[0043] like Figure 2 As shown, the inner side of the groove 220 is provided with a flange 230 of the opening 210 .

[0044] like Figure 2 As shown, a gasket 324 is further provided between the fastener 323 and the first protective cover 300 .

[0045] In actual production, the first protective cover 300 is made of stainless steel, and the second protective cover 400 is made of PE.

[0046] During the assembly process, the deformation of the wing 420 is caused by the squeezing force of the first protective cover 300 on the wing 420 and the friction force of the bottom surface of the groove 220. When the contact pressure and the wing angle on the wing 420 meet the sealing requirements at the same time, the protective cover reaches the best reverse osmosis rate and reaches the best assembly state. When the assembly does not reach this position, the reverse osmosis rate of the protective cover cannot reach the best. When the assembly exceeds this position, the deformation of the protective cover is too large and it is easy to cause damage to the wing 420, thereby causing failure of the sealing structure.

[0047] The first protective cover 300 is pushed toward the second protective cover 400 and the orifice 210 by the fastener to form surface contact, and the contact surface is subjected to force analysis. Since the contact surface between the wing 420 and the bottom of the groove 220 is mainly subjected to vertical pressure rather than shear stress, the contact surface is selected as the key area that mainly bears the sealing pressure to perform waterproof reverse osmosis control of the water tank electric heating port structure 500, which can provide a safer waterproof reverse osmosis control measure;

[0048] Specifically, the waterproof reverse osmosis control method of the present invention accurately calculates and predicts the reverse osmosis rate under different conditions by establishing a relationship between the reverse osmosis rate and parameters such as the wing angle, friction coefficient, and fastener force, thereby providing a theoretical basis for the design and optimization of the water tank electric heating port structure 500. By adjusting the force of the fastener, the pressure on the contact surface between the wing and the bottom of the groove is controlled to achieve waterproof reverse osmosis performance that meets the requirements.

[0049] It should be understood that the above-mentioned embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making pioneering innovations all fall within the scope of protection of the present invention.

Claims

1. A waterproof reverse osmosis control method for a water tank electric heating port structure, the water tank comprises a box body, the box body is provided with an electric heating port, the electric heating port is a rectangular opening, the interior of the opening is the inner cavity of the water tank, a groove is arranged around the opening, screw holes are arranged on the left and right sides of the bottom of the groove, the groove is used to insert a protective cover, Features: The protective cover comprises a second protective cover and a first protective cover which are matched and connected with the orifice in sequence, the convex edges around the outer side of the second protective cover are bent to form a second bent portion, the two side edges and the lower end of the second bent portion extend in three directions to form three wing pieces, the convex edge of the middle of the first protective cover is bent to the outer side to form a first bent portion, the four sides of the first bent portion extend outward and are connected to form a fitting portion, the two corners of the upper end of the fitting portion are each provided with a first notch, the two corners of the lower end of the fitting portion are each provided with a first through hole, the lower end of the fitting portion is connected to the screw hole at the groove through the first through hole provided by a fastener to achieve compression of the second protective cover; The waterproof reverse osmosis control method is to achieve waterproof reverse osmosis based on the sealing of the structural connections at the orifice groove of the electric heating port, which is specifically determined by the force of the fastener on the protective cover and the design requirements of the wing. The thickness of the wing is set to t, the width is set to B, and the elastic modulus is set to E. Under the action of the fastener, the fitting portion squeezes and fixes the wing in the groove. The force of the fastener is set to F. The sealing area of ​​the orifice protective cover is the contact surface between the second bent portion and the side of the groove and the contact surface between the wing and the bottom of the groove. Since the force F of the fastener is perpendicular to the bottom of the groove and is downward, the contact surface between the wing and the bottom of the groove becomes the key area that mainly bears the sealing pressure. The shear stress generated by the contact surface between the second bent portion and the side of the groove under the force F of the fastener makes its contact surface unable to withstand long-term sealing pressure. The sealing performance of the contact surface between the second bent portion and the side of the groove can be ignored. Therefore, the contact surface between the wing and the bottom of the groove is set to the effective sealing area, and the angle between the contact surface between the wing and the bottom of the groove is set to the wing angle θ, and the friction coefficient is set to μ 1 , the sealing circumference is set to L, and the reverse osmosis rate y of the water tank electric heating port structure satisfies the following formula: Where, y-reverse permeability, F-fastener force, t-wing thickness; B-wing width; E-wing elastic modulus; θ-wing angle; L-seal circumference, μ 1 - Friction coefficient, μ 2 -The dynamic viscosity of the liquid, a, b, k values ​​are adjustment coefficients.

2. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 1, Features: The water tank is a cylindrical barrel, and a plug-in groove is provided at the top of the barrel opening, and the upper end of the fitting part is plugged into the plug-in groove.

3. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 1, Features: The wing angle θ is 0 to 60 degrees.

4. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 1, Features: The second bent portion extends to the left side as the left wing piece, extends to the right side as the right wing piece, and extends downward as the lower wing piece.

5. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 4, Features: The bottom ends of the left and right wings are flush with the bottom end of the second protective cover, and their top ends exceed the top end of the second protective cover to form a U-shaped groove therewith; the two sides of the lower wing and the bottom ends of the left and right wings form a second notch.

6. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 1, Features: An orifice flange is arranged on the inner side of the groove.

7. The waterproof reverse osmosis control method of the water tank electric heating port structure according to claim 1, Features: A gasket is also provided between the fastener and the first protective cover.

8. A method for controlling waterproof reverse osmosis of a water tank electric heating port structure according to any one of claims 1 to 7, Features: The first protective cover is made of stainless steel, and the second protective cover is made of PE.

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