CN220303871U - Blow molding liner and electric water heater - Google Patents

Abstract

The utility model discloses a blow molding liner and an electric water heater. The blow molding liner includes: the liner comprises a liner body, wherein an installation part is arranged at the edge of a liner opening of the liner body, the installation part extends towards the outer side of the liner opening, an outward flange is arranged at the edge of the free end part of the installation part, and a first connecting part is arranged on the outer surface of the liner body; a flange; the connecting part is integrally in an annular structure, and a second connecting part is arranged on the connecting part; a reinforcing layer; the flange and the connecting part are sleeved on the mounting part, the connecting part is attached to the end face of the liner body, the flange is arranged on the connecting part, the flanging is lapped on the connecting part, the first connecting part is connected with the second connecting part, the reinforcing layer is wrapped on the outer part of the liner body, and the reinforcing layer is wrapped on the outer part of the connecting part. The use reliability of the blow molding liner is improved.

Description

Blow molding liner and electric water heater

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a blow molding liner and an electric water heater.

Background

At present, water heaters are household appliances commonly used in daily life of people, and are classified into electric water heaters, heat pump water heaters, solar water heaters and the like. The electric water heater is widely used because of its convenient use. The electric water heater can be divided into a water storage type electric water heater and an instant heating type electric water heater according to the heating power, and the water storage type electric water heater is provided with a water tank, so that the electric water heater has the characteristics of large water yield, stable water temperature and the like, and is purchased and used by more families.

For conventional water storage type electric water heater, it generally includes a water tank, an electric heating component and an electric control board, the water tank includes a housing and an inner container, the inner container is disposed in the housing, and a heat insulation layer is formed between the housing and the inner container to improve the heat insulation performance of the water tank. Wherein, the electric heater adopting the nonmetallic liner is widely popularized and used because of low manufacturing cost and little scale generation. For example, chinese patent publication No. CN112781228A discloses a plasticized liner and an electric water heater, wherein the liner body of the liner is made of plastic, and an auxiliary connecting piece is arranged on the liner opening of the liner body for mounting the electric heating tube on the liner body, wherein the annular reinforcing piece (flange) in the auxiliary connecting piece is connected with the liner body by embedding in the liner body. In the actual use process, because the connecting part of the flange and the liner body is positioned in the liner body, when the liner body bears larger pressure, the connecting part is easy to crack so as to cause water leakage, and the use reliability of the liner is lower.

In view of this, how to design a technology for improving the use reliability of the liner is a technical problem to be solved by the present utility model.

Disclosure of Invention

The utility model provides a blow molding liner and an electric water heater, which can improve the use reliability of the blow molding liner.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme:

in one aspect, the present utility model provides a blow-molded liner comprising:

the liner comprises a liner body, wherein an installation part is arranged at the edge of a liner opening of the liner body, the installation part extends towards the outer side of the liner opening, an outward flange is arranged at the edge of the free end part of the installation part, and a first connecting part is arranged on the outer surface of the liner body;

a flange;

the connecting part is integrally in an annular structure, and a second connecting part is arranged on the connecting part;

a reinforcing layer;

the flange and the connecting part are sleeved on the mounting part, the connecting part is attached to the end face of the liner body, the flange is arranged on the connecting part, the flanging is lapped on the connecting part, the first connecting part is connected with the second connecting part, the reinforcing layer is wrapped on the outer part of the liner body, and the reinforcing layer is wrapped on the outer part of the connecting part.

In one embodiment of the present application, the inner edge of the connecting member is provided with a first bending edge, and the outer edge is lapped on the first bending edge.

In an embodiment of the present application, a clamping groove is formed between the first bending edge and the surface of the connecting component, and a second bending edge is arranged at the inner edge of the flange and is inserted into the clamping groove.

In one embodiment of the present application, the flange is welded to the connecting member.

In an embodiment of the present application, an outer contour of the connecting component is non-circular, an installation groove is formed around the installation portion on an outer surface of the liner body, and a circumferential contour of the installation groove is matched with an outer contour of the connecting component;

wherein the outer contour of the connecting part forms the second connecting part, and the mounting groove forms the first connecting part.

In an embodiment of the present application, the first connection portion is a first positioning groove formed on an outer surface of the liner body, and the second connection portion is a first positioning protrusion formed on an inner surface of the extension portion;

or, the first connecting portion is a second positioning groove formed on the outer surface of the liner body, and the second connecting portion is a second positioning protrusion formed on the inner surface of the extension portion.

In an embodiment of the present application, an inner surface of the connecting component is an arc surface, and the inner surface of the connecting component is attached to an end surface of the liner body.

In an embodiment of the present application, further includes:

the electric heating component comprises a mounting plate and an electric heating pipe, and the electric heating pipe is arranged on the mounting plate;

wherein, the mounting plate is fixedly arranged on the flange.

In an embodiment of the present application, further includes:

a sealing gasket disposed between the mounting plate and the flange, and sandwiched between the flange and the mounting plate.

In another aspect, the present utility model also provides an electric water heater, including a housing, further including: above-mentioned blowing inner bag, the blowing inner bag sets up in the shell.

Compared with the prior art, the utility model has the advantages and positive effects that: the flange can be indirectly and fixedly arranged on the liner body through the addition of the independent connecting component, the flanging formed by the liner body is lapped on the connecting component, the connecting component is integrally positioned outside the liner body, and the connecting component is not required to be additionally embedded in the inner surface of the liner body, so that the inner surface of the liner body is kept intact, and further, cracks at the embedded part due to high pressure in the liner body are reduced in the actual use process, so that the use reliability is improved; meanwhile, the connecting part is further connected and matched with the liner body through the connecting part, when the surface of the liner body is wound with fibers to form a reinforcing layer, the position between the flange and the liner body can be ensured to be fixed, so that the winding quality is improved, the connecting part is further wrapped by the reinforcing layer, and the connecting part and the liner body have higher connecting strength, so that the overall quality of the blow-molded liner is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a blow molding liner according to a first embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of the blow-molded liner of FIG. 1;

FIG. 3 is an enlarged partial schematic view of the area A in FIG. 2;

FIG. 4 is a schematic view of the flange of FIG. 1;

FIG. 5 is a second schematic view of the flange of FIG. 1;

FIG. 6 is a schematic view of a blow-molded liner according to a second embodiment of the present utility model;

FIG. 7 is a partial cross-sectional view of the blow-molded liner of FIG. 6;

FIG. 8 is a partially enlarged schematic illustration of region B of FIG. 7;

FIG. 9 is a schematic view of the flange of FIG. 6;

FIG. 10 is a schematic view of a third embodiment of a blow-molded liner of the present utility model;

FIG. 11 is an exploded view of the blow-molded liner of FIG. 10;

FIG. 12 is a partial cross-sectional view of the blow-molded liner of FIG. 10;

FIG. 13 is an enlarged partial schematic view of region C of FIG. 12;

FIG. 14 is a schematic view of a fourth embodiment of a blow molded liner according to the present utility model;

FIG. 15 is a second schematic view of a flange in a fourth embodiment of a blow molded liner according to the present utility model.

Reference numerals illustrate:

a liner body 1;

a liner opening 11, a mounting portion 12, an outward flange 13, and a first connecting portion 14;

a flange 2;

the annular overlap 21, the second connecting portion 22, the connecting hole 23, the extension 24, the annular boss 25, the second bent edge 26, the through hole 27, the fixing member 28, the threaded hole 29;

an outer end surface 201, an inner end surface 202, an outer peripheral wall 203, an inner peripheral wall 204, a first inner flange 205, a second inner flange 206;

a reinforcing layer 3;

an electric heating member 4;

a mounting plate 41, an electric heating tube 42, and a mounting hole 43;

a sealing gasket 5;

a connecting member 6;

a third connecting portion 61, a first bent edge 62.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The electric water heater adopts electric energy as a main energy material, and the high-temperature heat generated after the electric energy is electrified directly heats water stored in the electric water heater so as to achieve the purpose of preparing hot water.

The electric water heater generally comprises a water tank, an electric heating component, an electric control board and the like, wherein a water storage cavity is formed in the water tank to store water to be heated, the electric heating component is inserted into the water storage cavity formed by the water tank, and the electric control board is used for controlling the electric heating component to be powered on and powered off so as to heat the water in the water tank to a set temperature.

For a water tank of an electric water heater, the water tank generally comprises a shell and an inner container, and an insulation layer is formed between the shell and the inner container. Wherein, the shell is generally made of plastic materials so as to meet the design requirements of beautiful and diversified shapes; the inner container can be a metal container body or a plastic container body according to the requirement.

In addition, the heat preservation that forms between shell and the inner bag, the heat preservation material that commonly uses has: asbestos, sponge, foam, polyurethane foam, etc., and in order to obtain a good heat-insulating effect in the conventional art, a heat-insulating layer is usually formed by foaming.

The water tank is also provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is used for conveying cold water into a water storage cavity formed in the water tank, and hot water in the water storage cavity is output from the water outlet pipe.

For the electric heating component, electric heating modes such as electric heating wires, magnetic energy or silicon tube heating can be adopted to heat water stored in the water storage cavity.

For the electric control board, the electric control board is used for receiving detection signals sent by related sensors (such as a water temperature sensor and a flow sensor) and controlling the electric heating component to be powered on and powered off.

When the electric water heater works, the electric heating component is controlled by the electric control board to be electrified and heated, and when the water temperature of the water in the water tank reaches a set value, the electric heating component is controlled by the electric control board to be powered off.

An embodiment of the present application provides an electric water heater with a non-metallic liner, where the liner generally includes a liner body, a flange, and an electric heating element, where the flange is mounted on the liner body, so as to satisfy that the electric heating element is fixed on the liner body by the flange.

In general, the flange is made of a metal material, and the flange needs to be connected with the liner body made of a plastic material in advance, so that in order to improve the connection reliability between the flange and the liner body, the following structural improvement design is performed on the connection mode of the flange and the liner body, and the following structural improvement design is described with reference to the accompanying drawings.

In a first embodiment, as shown in fig. 1-5, the present application provides a blow-molded liner comprising:

the liner body 1, the edge of the liner opening 11 of the liner body 1 is provided with a mounting part 12, the mounting part extends towards the outer side of the liner opening 11, the edge of the free end part of the mounting part is provided with an outward flange 13, and the outer surface of the liner body 1 is provided with a first connecting part 14;

the flange 2, the inner ring of the flange 2 is provided with an annular lap joint part 21, and the flange 2 is also provided with a second connecting part 22;

a reinforcing layer 3;

wherein, flange 2 cover is in on the installation department, and the turn-up edge 13 overlap joint is on annular overlap joint portion 21, and first connecting portion 14 is connected with second connecting portion 22, and enhancement layer 3 parcel is in the outside of courage body 1.

Specifically, the blow molding liner flange 2 provided in this embodiment is directly connected with the liner body 1, and in order to meet the requirement of directly connecting and assembling the liner body 1 and the flange 2, the liner opening 11 of the liner body 1 is formed with an installation portion extending outwards, the installation portion is in a shorter tubular structure, and the edge of the installation portion is further provided with an outward flange 13.

Correspondingly, an annular lap joint part 21 is arranged on the inner periphery of the flange 2, the flange 2 is integrally sleeved on the mounting part, and the flange 2 is lapped on the outer side of the annular lap joint part 21 through the flanging 13, so that the flange 2 is fixedly mounted on the liner body 1.

And because the flange 2 is integrally arranged outside the liner body 1, and the flange 2 is matched with the flange 13 to realize fixed assembly. In the use process of the filling water, no embedded part exists in the inner cavity of the liner body 1, namely, the connecting part of the flange 2 and the liner body 1 does not exist in the liner body 1. Therefore, when the water in the liner body 1 is heated to form higher pressure, water leakage can not occur due to cracks in the connecting part in the liner body 1, and the use reliability is improved.

In addition, the liner body 1 is supported by adopting a nonmetallic material, so that the overall structural strength of the liner is improved to meet the pressure-resistant requirement of the pressure container. The reinforcing layer 3 outside the bladder 1 is generally formed by winding fibers, wherein the specific winding method is not limited herein.

The liner body 1 is wound fiber to form the reinforcing layer 3, one end of the liner body 1 needs to be supported, the other end can be supported by the flange 2, and then the liner body 1 rotates to be wound. In order to ensure that the flange 2 does not rotate relative to the liner 1 to reduce winding quality in the winding process, the liner 1 and the flange 2 are further connected and matched through the first connecting part 14 and the second connecting part 22, and the two connecting parts are further connected, so that the flange 2 and the liner 1 can not rotate relatively.

In some embodiments, the first connecting portion 14 is a first positioning groove formed on the surface of the liner 1, and the second connecting portion 22 is a first positioning protrusion formed on the flange 2. Alternatively, in other embodiments, the first connecting portion 14 is a second positioning groove formed on the surface of the liner 1, and the second connecting portion 22 is a second positioning protrusion formed on the flange 2.

Specifically, after the flange 2 and the liner body 1 are assembled together, the positioning protrusion is located in the positioning groove, and the positioning protrusion and the positioning groove are mutually matched to limit the flange 2 to rotate relative to the liner body 1.

In some embodiments, in order to make the flange 2 better connect with the liner 1, the surface of the flange 2 attached to the end surface of the liner 1 is an arc surface.

Specifically, the surface of the flange 2, which is in contact with the liner body 1, is in an arc-shaped surface to be matched with the outer contour of the end face of the liner body 1, so that the flange and the liner body are effectively and reliably connected together.

In certain embodiments, flange 2 comprises an outer end face 201, an inner end face 202, an outer peripheral wall 203, and an inner peripheral wall 204, the outer end face and the inner end face being annular faces, the outer end face being outboard of the inner end face, the outer peripheral wall being outboard of the inner peripheral wall, the outer peripheral wall and the inner peripheral wall being between the outer end face and the inner end face.

Specifically, the flange 2 is hollow, and the inner end surface is abutted against the end surface of the liner body 1 so as to tightly connect the inner end surface and the end surface. And the inner peripheral wall 204 is provided with

Wherein, be provided with connecting hole 23 on the outer terminal surface to satisfy the installation requirement of electrical heating part, be provided with second connecting portion 22 on the interior terminal surface.

In addition, the inner peripheral wall is formed with a protruding annular overlap 21. Specifically, the inner edge of the outer end face is provided with a hemming structure (not labeled) with which the annular overlap 21 is formed.

In another embodiment, the blow-molded liner further comprises:

an electric heating part 4, the electric heating part 4 including a mounting plate 41 and an electric heating pipe 42, the electric heating pipe 42 being provided on the mounting plate 41;

a sealing gasket 5;

wherein the mounting plate 41 is fixedly mounted on the flange 2, the sealing gasket 5 is arranged between the mounting plate 41 and the flange 2, and the sealing gasket 5 is sandwiched between the flange 13 and the mounting plate 41.

Specifically, after the electric heating member 4 is mounted on the flange 2, it is necessary to seal the liner opening 11 of the liner body 1. Since the flange 13 formed by the liner opening 11 of the liner body 1 is overlapped on the annular overlap portion 21 of the flange 2, the flange 13 is directly subjected to sealing treatment by the sealing gasket 5 in order to ensure the sealing reliability of the liner body 1 in the pressure bearing process. I.e. the sealing gasket 5 is clamped between the mounting disc 41 and the flange 2, while the sealing gasket 5 is pressed between the mounting disc 41 and the flange 13, with the sealing gasket 5 forming a sealing area with the flange 13 and the mounting disc 41.

The outer edge of the mounting part forms an outward flanging, the corresponding flange is provided with an annular lap joint part, in the actual processing process, the liner body is processed and molded, the flange is sleeved on the mounting part, and the edge of the mounting part is subjected to flanging treatment, so that the outward flanging formed by the mounting part is lapped on the annular lap joint part, and therefore, a connecting part is not required to be additionally embedded into the inner surface of the liner body, the inner surface of the liner body is kept integral, and further, cracks generated at the embedded part due to high pressure in the liner body are reduced in the actual use process, so that the use reliability is improved; simultaneously, carry out further connection cooperation through connecting portion between flange and the courage body, and then when the surface winding fibre of courage body is in order to form the enhancement layer, can ensure that the position between flange and the courage body is motionless to improve winding quality, and then improve the whole quality of blowing inner bag.

In a second embodiment, as shown in fig. 6-9, the present application further provides a blow molding liner, which includes:

the liner body 1, the edge of the liner opening 11 of the liner body 1 is provided with a mounting part 12, the mounting part extends towards the outer side of the liner opening 11, the edge of the free end part of the mounting part is provided with an outward flange 13, and the outer surface of the liner body 1 is provided with a first connecting part 14;

the flange 2, the inner ring of the flange 2 has annular overlap joint 21, the outer ring of the flange 2 has extension 24, there are second connecting portions 22 on the extension 24;

a reinforcing layer 3;

wherein, flange 2 cover is in on the installation department, and the turn-up edge 13 overlap joint is on annular overlap joint portion 21, and first connecting portion 14 is connected with second connecting portion 22, and enhancement layer 3 parcel is in the outside of courage body 1, and enhancement layer 3 still wraps up in the outside of extension 24.

Specifically, the flange 2 in this embodiment is also directly connected to the liner 1, and an annular lap joint portion 21 is provided on the inner ring of the flange 2 to be connected in cooperation with the flange 13 formed on the liner 1. The outer ring of the flange 2 is provided with an extension 24, and the contact area with the liner 1 is increased by the extension 24.

The liner opening 11 of the liner body 1 is formed with an installation part extending outwards, the installation part is of a shorter tubular structure, the flange 2 is sleeved on the installation part and is lapped on the outer side of the annular lap joint part 21 through the flanging 13, so that the flange 2 is fixedly installed on the liner body 1.

For the internal pressure bearing of the liner body 1, the flange 2 is integrally arranged outside the liner body 1, and the flange 13 is matched with the flange 2 to realize fixed assembly. During use, no insert exists in the inner cavity of the liner body 1. Therefore, when the water in the liner body 1 is heated to form higher pressure, water leakage can not occur due to cracks in the connecting part in the liner body 1, and the use reliability is improved.

In addition, the liner body 1 is supported by adopting a nonmetallic material, so that the overall structural strength of the liner is improved to meet the pressure-resistant requirement of the pressure container. The reinforcing layer 3 outside the bladder 1 is generally formed by winding fibers, wherein the specific winding method is not limited herein. In order to further improve the connection reliability between the flange 2 and the liner 1, the reinforcement layer 3 is wrapped around the extension 24 by fibers at a portion near the liner opening 11, so that the extension 24 is firmly and reliably fixed to the liner 1 by the reinforcement layer 3.

Meanwhile, in the process of winding the fiber to form the reinforcing layer 3, the liner 1 needs to be rotated to wind the fiber, both ends of the liner 1 need to be supported and rotated, and the end with the liner opening 11 can be supported by the flange 2, and then the liner 1 rotates to wind. In order to ensure that the flange 2 does not rotate relative to the liner 1 to reduce winding quality in the winding process, the liner 1 and the flange 2 are further connected and matched through the first connecting part 14 and the second connecting part 22, and the two connecting parts are further connected, so that the flange 2 and the liner 1 can not rotate relatively.

In some embodiments, the first connecting portion 14 and the second connecting portion 22 may be represented by various manners, for example, a manner that the positioning protrusion and the positioning groove cooperate with each other to rotate the limiting flange 2 relative to the liner 1 may be adopted, which is specifically referred to as the description of the first embodiment.

Alternatively, the second connecting portion 22 may be implemented by designing the outer contour of the extension portion 24 to be non-circular, and the corresponding first connecting portion 14 is provided with a mounting groove (not labeled) around the mounting portion on the outer surface of the liner 1, and the circumferential contour of the mounting groove matches the outer contour of the extension portion 24.

Specifically, during the actual assembly process, the flange 2 is positioned and fixed on the mounting portion by the flange 13, and then the extension 24 is positioned in the mounting groove. The extension 24 cannot rotate in the mounting groove due to the non-circular outer profile of the extension 24.

For the outer contour of the extension 24, various structural forms can be adopted, such as: the outer contour of the extension 24 is wavy, or alternatively, the outer contour of the extension 24 is elliptical.

In some embodiments, to make the flange 2 better connected to the liner 1, the inner surface of the extension 24 is an arc surface, and the inner surface of the extension 24 is attached to the end surface of the liner 1.

Specifically, since the outer peripheral ring of the flange 2 is formed with the extending portion 24 extending outwards, the extending portion 24 and the end face of the liner body 1 are designed along with the shape, so that the extending portion 24 can be better attached to the end face of the liner body 1, and connection reliability between the extending portion 24 and the liner body 1 is improved.

In one embodiment, for easy installation of the electric heating element 4, the flange 2 is provided with an annular boss 25, the annular boss 25 is located between the annular overlap 21 and the extension 24, and the annular boss 25 is provided with a connection hole 23.

Specifically, the flange 2 forms a convex annular boss 25 between the annular overlap 21 and the extension 24, and the annular boss 25 is used to meet the installation requirements of the electric heating element 4. In addition, the structural design of the annular boss 25 is more beneficial to improving the overall structural strength of the flange 2.

In another embodiment, the blow-molded liner further comprises:

an electric heating part 4, the electric heating part 4 including a mounting plate 41 and an electric heating pipe 42, the electric heating pipe 42 being provided on the mounting plate 41;

a sealing gasket 5;

wherein the mounting plate 41 is fixedly mounted on the flange 2, the sealing gasket 5 is arranged between the mounting plate 41 and the flange 2, and the sealing gasket 5 is sandwiched between the flange 13 and the mounting plate 41.

Specifically, the mounting plate 41 is fixedly mounted on the annular boss 25 of the flange 2 by bolts so as to satisfy the fitting of the electric heating element 4 to the container body 1.

After the electric heating member 4 is mounted on the flange 2, the liner opening 11 of the liner body 1 needs to be sealed. Since the flange 13 formed by the liner opening 11 of the liner body 1 is overlapped on the annular overlap portion 21 of the flange 2, the flange 13 is directly subjected to sealing treatment by the sealing gasket 5 in order to ensure the sealing reliability of the liner body 1 in the pressure bearing process. I.e. the sealing gasket 5 is clamped between the mounting disc 41 and the flange 2, while the sealing gasket 5 is pressed between the mounting disc 41 and the flange 13, with the sealing gasket 5 forming a sealing area with the flange 13 and the mounting disc 41.

The outer edge of the mounting part forms an outward flanging, the corresponding flange is provided with an annular lap joint part, in the actual processing process, the liner body is processed and molded, the flange is sleeved on the mounting part, and the edge of the mounting part is subjected to flanging treatment, so that the outward flanging formed by the mounting part is lapped on the annular lap joint part, and therefore, a connecting part is not required to be additionally embedded into the inner surface of the liner body, the inner surface of the liner body is kept integral, and further, cracks generated at the embedded part due to high pressure in the liner body are reduced in the actual use process, so that the use reliability is improved; simultaneously, the extension is further connected through connecting portion with the courage body between, when the surface winding fibre of courage body is in order to form the enhancement layer, can ensure that the position between flange and the courage body is motionless to improve winding quality, and the enhancement layer still wraps extension, makes to have higher joint strength between flange and the courage body, in order to improve the whole quality of blowing inner bag.

In a third embodiment, as shown in fig. 10-13, the present application further provides a blow-molded liner, comprising: the liner body 1, the flange 2 and the reinforcing layer 3. The difference is that the flange 2 in this embodiment is indirectly mounted on the liner 1 through the connecting member 6, which is described with reference to the drawings.

The edge of the liner opening 11 of the liner body 1 is provided with a mounting portion 12 which extends towards the outer side of the liner opening 11, the edge of the free end of the mounting portion is provided with a flanging 13, and the outer surface of the liner body 1 is provided with a first connecting portion 14.

The connecting part 6 is of an annular structure as a whole, and a third connecting part 61 is arranged on the connecting part 6;

wherein, flange 2 and connecting piece 6 all overlap on the installation department, connecting piece 6 paste on the terminal surface of courage body 1, and flange 2 sets up on connecting piece 6, and the overlap joint of flanging 13 is on connecting piece 6, and first connecting portion 14 is connected with third connecting portion 61, and enhancement layer 3 parcel is in the outside of courage body 1, and enhancement layer 3 still wraps up in the outside of connecting piece 6.

Specifically, the flange 2 in the blow molding liner provided in this embodiment needs to be indirectly connected and assembled with the liner body 1 by means of the connecting component 6, and in order to meet the requirement of connecting and assembling the liner body 1 and the connecting component 6, the liner opening 11 of the liner body 1 is formed with the mounting portion extending outwards, the mounting portion is in a shorter tubular structure, and the edge of the mounting portion is further provided with an outward flange 13.

The connecting part 6 is of an annular structure as a whole and is sleeved on the mounting part, and meanwhile, the outward flange 13 is lapped on the inner side edge of the connecting part 6, so that the connecting part 6 is fixedly mounted on the liner body 1 through the outward flange 13.

At the same time, the flange 2 is also sleeved on the mounting part, and the flange 2 is positioned outside the connecting part 6 and fixedly mounted on the connecting part 6, so that the flange 2 is not directly mounted and fixed with the liner body 1, but indirectly mounted through the connecting part 6.

In one embodiment, the inner surface of the connecting member 6 is an arc surface, and the inner surface of the connecting member 6 is attached to the end surface of the liner 1.

Specifically, the connecting part 6 is an independent part, and can be better and randomly designed with the liner body 1, so that the flange 2 is fixedly installed on one hand, and the end part of the liner body 1 with the liner opening 11 can be structurally reinforced through the connecting part 6 on the other hand.

In another embodiment, in order to allow a better connection of the connecting part 6 to the liner 1, the inner edge of the connecting part 6 is provided with a first bent edge 62, and the external flange 13 is overlapped on the first bent edge 62.

Specifically, the inner edge of the connecting component 6 is provided with a first annular bending edge 62, and the first bending edge 62 can be better matched with the outward flange 13 on the liner body 1, so as to realize the fixed mounting of the connecting component 6 on the liner body 1.

The first bending edge 62 may be a multi-bending structure, so that a clamping groove (not labeled) is formed between the first bending edge 62 and the surface of the connecting component 6, and the inner edge of the flange 2 is provided with the second bending edge 26, and the second bending edge 26 is inserted into the clamping groove.

In particular, during the actual assembly process, the flange 2 and the connecting part 6 may be preassembled, the inner edge of the flange 2 being formed with the second bent edge 26, while the first bent edge 62 will overlap the outer portion of the second bent edge 26 to limit the detachment of the flange 2 from the connecting part 6 by the cooperation of the first bent edge 62 and the second bent edge 26.

In order to more firmly and reliably connect the flange 2 to the connecting member 6, the flange 2 is welded to the connecting member 6.

In some embodiments, there may be various ways for the presentity of the first connection 14 and the third connection 61.

For example: the outer contour of the connecting part 6 is non-circular, the outer surface of the liner body 1 is provided with a mounting groove around the mounting part, and the circumferential contour of the mounting groove is matched with the outer contour of the connecting part 6; the outer contour of the connecting part 6 forms a second connecting portion 22 and the mounting groove forms a first connecting portion 14.

Specifically, after the connecting member 6 is placed in the mounting groove, since the outer contour of the connecting member 6 is non-circular, the connecting member 6 is restricted from rotating relative to the liner 1 after being engaged with the mounting groove. While the outer contour of the extension 24 may be wavy, or the outer contour of the extension 24 may be elliptical, etc., without limitation.

Alternatively, a manner of matching the positioning protrusion with the positioning groove may be adopted, and the description of the structure of matching the positioning protrusion with the positioning groove in the first and second embodiments is specifically referred to, which is not limited and repeated herein.

In another embodiment, the blow-molded liner further comprises:

an electric heating part 4, the electric heating part 4 including a mounting plate 41 and an electric heating pipe 42, the electric heating pipe 42 being provided on the mounting plate 41;

a sealing gasket 5;

wherein the mounting plate 41 is fixedly mounted on the flange 2, the sealing gasket 5 is arranged between the mounting plate 41 and the flange 2, and the sealing gasket 5 is sandwiched between the flange 13 and the mounting plate 41.

Specifically, after the electric heating member 4 is mounted on the flange 2, it is necessary to seal the liner opening 11 of the liner body 1. Since the flange 13 formed by the liner opening 11 of the liner body 1 is overlapped on the annular overlap portion 21 of the flange 2, the flange 13 is directly subjected to sealing treatment by the sealing gasket 5 in order to ensure the sealing reliability of the liner body 1 in the pressure bearing process. I.e. the sealing gasket 5 is clamped between the mounting disc 41 and the flange 2, while the sealing gasket 5 is pressed between the mounting disc 41 and the flange 13, with the sealing gasket 5 forming a sealing area with the flange 13 and the mounting disc 41.

The flange can be indirectly and fixedly arranged on the liner body through the addition of the independent connecting component, the flanging formed by the liner body is lapped on the connecting component, the connecting component is integrally positioned outside the liner body, and the connecting component is not required to be additionally embedded in the inner surface of the liner body, so that the inner surface of the liner body is kept intact, and further, cracks at the embedded part due to high pressure in the liner body are reduced in the actual use process, so that the use reliability is improved; meanwhile, the connecting part is further connected and matched with the liner body through the connecting part, when the surface of the liner body is wound with fibers to form a reinforcing layer, the position between the flange and the liner body can be ensured to be fixed, so that the winding quality is improved, the connecting part is further wrapped by the reinforcing layer, and the connecting part and the liner body have higher connecting strength, so that the overall quality of the blow-molded liner is improved.

In the fourth embodiment, based on the first to third embodiments, the following structural modifications are made to the structure of the flange 2 to satisfy the requirement of facilitating the connection and installation of the electric heating element by the operator.

As shown in fig. 11, 14 and 15, the present application provides a blow-molded liner comprising:

the liner body 1, one end of the liner body 1 is provided with a liner opening 11;

the flange 2 is provided with a plurality of through holes 27, the inner surface of the flange 2 is also provided with a plurality of fixing parts 28, the fixing parts 28 are provided with threaded holes 29, and the threaded holes 29 are communicated with the corresponding through holes 27;

the electric heating part 4, the electric heating part 4 includes the mounting plate 41 and electric heating tube 42, the electric heating tube 42 is set up on the mounting plate 41, there are mounting holes 43 on the mounting plate 41;

wherein, flange 2 sets up on courage body 1 and arranges around courage mouth 11, and mounting disc 41 sets up on flange 2, and the bolt passes mounting hole 43 and through-hole 27 in proper order and threaded connection in screw hole 29, and electric heating pipe 42 stretches into courage body 1 through courage mouth 11.

Specifically, the flange 2 itself in the present embodiment is provided with a fixing member 28, and the fixing member 28 is provided with a screw hole 29, and the flange 2 in fig. 11 is replaced with the flange 2 structure of fig. 14 and 15. In the actual assembly process, after the flange 2 is assembled to the container body 1, the mounting plate 41 is abutted against the flange 2 and the mounting holes 43 are aligned with the corresponding through holes 27, so that an operator can insert bolts into the threaded holes 29 via the mounting holes 43 and the through holes 27 and tighten the bolts in the threaded holes to firmly and reliably fix the mounting plate 41 to the flange 2.

In some embodiments, there are various ways of mounting the fixing member 28 to the flange 2. For example: the fixing member 28 is welded to the inner surface of the flange 2.

Specifically, the fixing member 28 may be a conventional member having an internally threaded hole such as a nut, and the fixing member 28 is directly welded to the inner surface of the flange 2.

Alternatively, the flange 2 is provided with a first inner flange 205 at its inner edge and a second inner flange 206 at its outer edge, between which the securing element 28 is clamped.

Specifically, the flange 2 is provided with the first inward flange and the second inward flange which are oppositely arranged, and the distance between the first inward flange and the second inward flange is designed so that the flange 2 can be clamped between the first inward flange and the second inward flange in an interference fit manner.

Through being provided with fixed part at the internal surface of flange, after the flange assembly is to the courage body, when assembling with electric heating element, only need paste electric heating element's mounting disc on the flange to make the through-hole align with corresponding mounting hole, operating personnel only need insert the bolt in proper order in mounting hole and the through-hole, alright screw down the bolt on fixed part, with the equipment of accomplishing electric heating element, and then need not the preassembly bolt and fix through outside nut, make things convenient for operating personnel equipment in order to improve packaging efficiency.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A blow-molded liner, comprising:

the liner comprises a liner body, wherein an installation part is arranged at the edge of a liner opening of the liner body, the installation part extends towards the outer side of the liner opening, an outward flange is arranged at the edge of the free end part of the installation part, and a first connecting part is arranged on the outer surface of the liner body;

a flange;

the connecting part is integrally in an annular structure, and a second connecting part is arranged on the connecting part;

a reinforcing layer;

the flange and the connecting part are sleeved on the mounting part, the connecting part is attached to the end face of the liner body, the flange is arranged on the connecting part, the flanging is lapped on the connecting part, the first connecting part is connected with the second connecting part, the reinforcing layer is wrapped on the outer part of the liner body, and the reinforcing layer is wrapped on the outer part of the connecting part.

2. A blow-molded liner as in claim 1 wherein the inner edge of the connecting member is provided with a first bent edge over which the outer flange overlaps.

3. A blow-molded liner according to claim 2, wherein a clamping groove is formed between the first bent edge and the surface of the connecting member, and the inner edge of the flange is provided with a second bent edge, the second bent edge being inserted into the clamping groove.

4. The blow molded liner of claim 1, wherein the flange is welded to the connecting member.

5. The blow molding liner according to claim 1, wherein the outer contour of the connecting member is non-circular, and the outer surface of the liner body is provided with a mounting groove around the mounting portion, and the circumferential contour of the mounting groove matches the outer contour of the connecting member;

wherein the outer contour of the connecting part forms the second connecting part, and the mounting groove forms the first connecting part.

6. The blow-molded liner of claim 1, wherein an outer ring of the flange is provided with an extension;

the first connecting part is a first positioning groove formed on the outer surface of the liner body, and the second connecting part is a first positioning protrusion formed on the inner surface of the extension part; or, the first connecting portion is a second positioning groove formed on the outer surface of the liner body, and the second connecting portion is a second positioning protrusion formed on the inner surface of the extension portion.

7. The blow-molded liner of claim 1, wherein the inner surface of the connecting member is arcuate, and wherein the inner surface of the connecting member is attached to the end surface of the liner body.

8. The blow molded liner of any of claims 1-7, further comprising:

the electric heating component comprises a mounting plate and an electric heating pipe, and the electric heating pipe is arranged on the mounting plate;

wherein, the mounting plate is fixedly arranged on the flange.

9. The blow molded liner of claim 8, further comprising:

a sealing gasket disposed between the mounting plate and the flange, and sandwiched between the flange and the mounting plate.

10. An electric water heater, including the shell, its characterized in that still includes: a blow-molded liner as in any of claims 1-9, disposed in the outer shell.