Magnesium rod assembly and water heater

Abstract

The utility model relates to a magnesium rod assembly and a water heater. The magnesium rod assembly comprises a magnesium rod body; the covering part is provided with a containing cavity, and the magnesium rod body part is arranged in the containing cavity. According to the magnesium rod assembly, the self-corrosion rate of the magnesium rod body can be restrained, and the service life of the magnesium rod assembly is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, and in particular to a magnesium rod assembly and a water heater. BACKGROUND

[0002] The enamel liner and the magnesium rod anode are currently a reliable liner anticorrosion technology. Because magnesium is relatively active, the "magnesium anode" usually uses magnesium alloy instead of pure magnesium material, which can reduce the self-corrosion of magnesium, and some alloy components can generate fine metallographic structures, so that when the magnesium rod is consumed, the attachments that are not easily dissolved in water can be uniformly detached from the surface of the magnesium rod, preventing the magnesium rod from being passivated to cause non-reaction.

[0003] The proportion of magnesium in the magnesium alloy and the service life represent the length of time that the enamel liner is protected. In order to prolong the service life of the magnesium rod anode, the industry currently mainly prolongs the service life of the magnesium rod by increasing the weight of the magnesium rod.

[0004] However, due to the high activity of the magnesium rod, it has a strong self-corrosion tendency. In actual use, in addition to acting as a sacrificial anode to provide electrons for the cathode through oxidation reaction (Mg→Mg2++2e-), the magnesium rod also produces hydrogen through hydrolysis reaction (Mg+2H20→Mg2++2OH-+H2), and the magnesium metal that has self-corrosion cannot provide protection for the cathode. Therefore, although increasing the weight of the magnesium rod can inhibit the corrosion rate of the magnesium rod and prolong the service life of the magnesium rod to a certain extent, it also increases the mass of the magnesium rod used for self-corrosion, thereby increasing the self-corrosion rate of the magnesium rod and affecting the cathodic protection effect. CONTENT OF THE INVENTION

[0005] The present application provides a magnesium rod assembly and a water heater to solve the problem of high self-corrosion rate of the magnesium rod when it reacts with the enamel liner.

[0006] In a first aspect, the present application provides a magnesium rod assembly, which comprises:

[0007] a magnesium rod body;

[0008] a cover provided with a receiving cavity, and the magnesium rod body is arranged in the receiving cavity.

[0009] In some embodiments, the magnesium rod body is detachably connected to the cover.

[0010] In some embodiments, the magnesium rod body is provided with a connecting end and a reaction end arranged opposite to each other, the reaction end is exposed to the cover, and the connecting end is detachably connected to the cover.

[0011] In some embodiments, the connecting end is provided with a first clamping part, and the inside of the cover is provided with a second clamping part, the first clamping part and the second clamping part are clamped and matched.

[0012] In some embodiments, the first clamping part is a groove, and the second clamping part is a clamping convex.

[0013] In some embodiments, the cover is an insulating part.

[0014] In some embodiments, the magnesium rod body comprises a magnesium rod base body and a mandrel, the mandrel is located in the middle of the magnesium rod base body, and the magnesium rod base body and the mandrel are integrally formed.

[0015] In some embodiments, the mandrel is further provided with a threaded connecting part, and the threaded connecting part is used for cooperating with a corresponding threaded connecting part of an external water heater liner.

[0016] In some embodiments, the magnesium rod assembly is further provided with a spring washer and a connecting piece, the connecting piece is connected with the threaded connecting part, and the spring washer is abutted between the cover and the connecting piece.

[0017] In the second aspect, the application provides a water heater, comprising: a water heater liner; and the magnesium rod assembly of any one of the above, the magnesium rod assembly is arranged in the water heater liner.

[0018] Compared with the prior art, the above technical solution provided by the embodiments of the application has the following advantages:

[0019] The magnesium rod assembly provided by the embodiments of the application is provided with a cover capable of covering part of the magnesium rod body, so that only the area of the bottom of the magnesium rod body not covered by the cover can contact the solution in the external water heater liner for reaction, thereby the self-corrosion rate of the magnesium rod body can be inhibited, and the service life of the magnesium rod assembly can be effectively prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings incorporated into the specification and forming a part thereof, show embodiments consistent with the application, and together with the specification serve to explain the principles of the application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0022] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are not intended to limit the present embodiments, the figures in which like reference numerals refer to similar elements, and which show:

[0023] Fig. 1 A structural schematic diagram of a magnesium rod assembly provided by an embodiment of the present application.

[0024] Fig. 2 A partial structural schematic diagram of a magnesium rod assembly provided by an embodiment of the present application.

[0025] Legend of reference signs:

[0026] Magnesium rod assembly 10, magnesium rod body 100, connecting end 101, reaction end 102, magnesium rod base 110, mandrel 120, threaded connection portion 140, cover 200, spring washer 300, connecting piece 400. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0028] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of the specific examples in the following are described. Of course, they are only examples and are not intended to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not itself indicate a relationship between the various embodiments and / or settings discussed.

[0029] For the convenience of description, spatial relative terms can be used in the specification to describe the relative position relationship or movement condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the specification are interpreted accordingly.

[0030] The enamel liner and magnesium rod anode are currently a reliable liner anti-corrosion technology. Because magnesium is relatively active, the "magnesium anode" usually uses magnesium alloy instead of pure magnesium material, which can reduce the self-corrosion of magnesium, and some alloy components

[0031] will generate fine metallographic structures, so that after the magnesium rod is consumed, the attachments that are not easily dissolved in water can be uniformly detached from the surface of the magnesium rod, preventing the magnesium rod from being passivated and causing non-reaction.

[0032] The proportion of magnesium in the magnesium alloy and the service life represent the length of time the enamel liner is protected. In order to prolong the service life of the magnesium rod anode, the industry currently mainly prolongs the service life of the magnesium rod by increasing the weight of the magnesium rod and using a resistance magnesium rod. The principle of the resistance magnesium rod is to appropriately increase the resistance between the magnesium rod anode and the protected cathode in the original battery circuit, limit the size of the current in the original battery circuit, and thereby achieve the rate of inhibiting chemical corrosion and slow down the consumption speed of the magnesium rod.

[0033] However, the scheme of increasing the weight of the magnesium rod and using a resistance magnesium rod has the following technical problems:

[0034] 1. The scheme of increasing the weight of the magnesium rod can only increase the service life to a limited extent and cannot inhibit the consumption speed of the magnesium rod. After more magnesium is introduced, the generation of magnesium carbonate and other precipitates caused by the consumption of the magnesium rod will be intensified, affecting the user experience;

[0035] 2、Magnesium rod has high activity and strong self-corrosion tendency. In actual use, in addition to serving as a sacrificial anode to provide electrons for the cathode (Mg→ Mg2++ 2e-) and protect the cathode, magnesium rod also undergoes hydrolysis reaction and produces hydrogen (Mg + 2H2O→ Mg2++ 2OH-+ H2), and the magnesium metal that has undergone self-corrosion cannot protect the cathode. Therefore, unilateral inhibition of the galvanic corrosion rate of the magnesium rod will also increase the mass of the magnesium rod used for self-corrosion, affect the cathodic protection effect, and increase the accumulation of hydrogen, causing safety risks.

[0036] 3、When the added resistance is too large, the magnesium rod is short-circuited and cannot serve as a sacrificial anode.

[0037] To solve the above technical problems, the application provides a magnesium rod assembly and a water heater, which can inhibit the self-corrosion rate of the magnesium rod body and effectively prolong the service life of the magnesium rod assembly.

[0038] Referring to Figs. 1-2 The application provides a magnesium rod assembly 10, which comprises a magnesium rod body 100 and a cover 200.

[0039] The cover 200 is provided with a containing cavity, and the magnesium rod body 100 is partially arranged in the containing cavity.

[0040] The magnesium rod body 100 is used as an anode protection material in the inner tank of the water heater.

[0041] Because the cover 200 is arranged to cover part of the magnesium rod body 100, only the area of the bottom of the magnesium rod body 100 that is not covered by the cover 200 can contact the solution in the outer tank of the water heater for reaction, so that the self-corrosion rate of the magnesium rod body 100 can be inhibited, and the service life of the magnesium rod can be effectively prolonged. At the same time, as the magnesium rod body 100 is consumed, the compounds that are not easily dissolved in water attached to the magnesium rod body 100 also naturally fall off under the action of the alloy composition and water flow, so that new magnesium rod body 100 is exposed for protecting the inner tank of the water heater.

[0042] In addition, by reducing the anode area, the size of the galvanic cell circuit can be effectively reduced, and the protection potential of the magnesium rod body 100 and the protection effect on the enamel inner tank (i.e., the inner tank of the water heater) are not affected.

[0043] In some embodiments, the cover 200 can be a hollow cylinder.

[0044] In some embodiments, the cover 200 can be made of an insulating and waterproof material to isolate the magnesium rod body 100 from the solution in the tank of the water heater.

[0045] The insulating and waterproof material can be polytetrafluoroethylene (PTFE), silicone rubber, polyvinyl chloride (PVC), etc.

[0046] In some embodiments, the cover 200 is an insulating member, which can isolate the magnesium rod body 100 from the solution in the inner container of the water heater.

[0047] In some embodiments, the magnesium rod body 100 is detachably connected to the cover 200.

[0048] Since the magnesium rod body 100 will gradually be consumed after being used for a period of time and lose its protective effect, it needs to be replaced regularly. By designing the magnesium rod body 100 to be detachably connected to the cover 200, the user can detach the magnesium rod body 100 as needed, thereby prolonging the service life of the cover 200.

[0049] In some embodiments, the magnesium rod body 100 is provided with a connecting end 101 and a reaction end 102 arranged opposite to each other, the reaction end 102 is exposed to the cover 200, and the connecting end 101 is detachably connected to the cover 200.

[0050] In some embodiments, the connecting end 101 is provided with a first clamping part, and the inside of the cover 200 is provided with a second clamping part, the first clamping part and the second clamping part are clamped and matched.

[0051] In some embodiments, the first clamping part is a groove, and the second clamping part is a clamping convex.

[0052] In some embodiments, the magnesium rod body 100 includes a magnesium rod base body 110 and a mandrel 120, the mandrel 120 is located at the middle part of the magnesium rod base body 110, and the magnesium rod base body 110 and the mandrel 120 are integrally formed.

[0053] The mandrel 120 can be first vertically installed in the cover 200, then the magnesium rod molten liquid is injected, and then cooled and shaped to obtain the magnesium rod base body 110.

[0054] The groove can be arranged at the connecting end 101 of the mandrel 120 to be clamped and fixed with the clamping convex in the accommodating cavity of the cover 200.

[0055] In some embodiments, the magnesium rod base body 110 can be made of a rare earth magnesium alloy material; after the magnesium rod base body 110 at the bottom surface is consumed, the insoluble substances generated will naturally fall off and expose new magnesium rod base body 110.

[0056] When the magnesium rod assembly is placed in the inner container of the water heater and filled with water, only the inner container with good conductivity is connected between the anode and the protected cathode, which can ensure the magnesium rod body 110 as a sacrificial anode; because the area of the anode in contact with the electrolyte solution is small, the current of the primary cell is small, which can inhibit the consumption rate of the magnesium rod body 110.

[0057] In addition, the magnesium rod body only has a bare area that continuously undergoes a self-corrosion reaction, reducing the rate of self-corrosion, thereby increasing the weight ratio of the magnesium rod body that can be used as a protective cathode, and prolonging the service life of the magnesium rod body.

[0058] When the magnesium rod body 110 is further consumed, a large amount of reaction product that is not easily dissolved in water will be attached to the bottom of the magnesium rod body 110, but under the action of water flow and magnesium alloy, it will naturally fall off and expose new magnesium rod body 110, thereby effectively prolonging the service life of the magnesium rod body 110 without increasing the mass of the magnesium rod body 110.

[0059] In some embodiments, the mandrel 120 is also provided with a threaded connection portion 140 for cooperating with a corresponding threaded connection portion 140 of the outer water heater inner container.

[0060] The magnesium rod body 110 needs to be installed vertically at the bottom of the outer water heater inner container.

[0061] In some embodiments, the magnesium rod assembly 10 is also provided with a spring washer 300 and a connecting piece 400, the connecting piece 400 is connected with the threaded connection portion 140, and the spring washer 300 abuts between the cover 200 and the connecting piece 400.

[0062] The connecting piece 400 is used to connect with the outer water heater inner container, and the connecting piece 400 can be a screw cap.

[0063] Taking the screw cap as an example, the screw cap can be provided with an internal thread to be screwed with the threaded connection portion 140.

[0064] Since the connecting piece 400 is connected with the threaded connection portion 140, it may be easy to loosen, therefore, by providing a spring washer 300, since the spring washer 300 abuts between the cover 200 and the connecting piece 400 and is clamped by the threaded connection portion 140, the resistance can be increased, and the fastening effect between the connecting piece 400 and the threaded connection portion 140 can be improved.

[0065] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0068] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0070] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the above expressions in various places in the description are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers that identify a particular order or pattern, rather than to denote a chronological or absolute sequence. It will be apparent to those skilled in the art that the application can be practiced without the specific details given above.

[0071] Obviously, various modifications and changes can be made to the present application without departing from the spirit and scope thereof. It is understood that such modifications and changes are intended to fall within the scope of the application, which is to be interpreted in the broadest sense possible. Accordingly, it is intended that all such modifications and changes be included within the scope of the claims and the scope of the present application.

[0072] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A magnesium rod assembly, characterized by, The magnesium rod assembly comprises: a magnesium rod body; a cover provided with a receiving cavity, the magnesium rod body being partially arranged in the receiving cavity.

2. The magnesium rod assembly of claim 1, wherein, The magnesium rod body is detachably connected to the cover.

3. The magnesium rod assembly of claim 2, wherein, The magnesium rod body is provided with a connecting end and a reaction end arranged oppositely, the reaction end being exposed to the cover, and the connecting end being detachably connected to the cover.

4. The magnesium rod assembly of claim 3, wherein, The connecting end is provided with a first clamping part, and the inside of the cover is provided with a second clamping part, the first clamping part being clamped and matched with the second clamping part.

5. The magnesium rod assembly of claim 4, wherein, The first clamping part is a groove, and the second clamping part is a clamping convex.

6. The magnesium rod assembly of any one of claims 1-5, wherein, The cover is an insulating part.

7. The magnesium rod assembly of claim 1, wherein, The magnesium rod body comprises a magnesium rod base and a mandrel, the mandrel being located at the middle part of the magnesium rod base, and the magnesium rod base and the mandrel being integrally formed.

8. The magnesium rod assembly of claim 7, wherein, The mandrel is further provided with a threaded connecting part, the threaded connecting part being used for cooperating with a corresponding threaded connecting part of an external water heater inner container.

9. The magnesium rod assembly of claim 8, wherein, The magnesium rod assembly is further provided with a spring washer and a connecting piece, the connecting piece being connected with the threaded connecting part, and the spring washer being abutted between the cover and the connecting piece.

10. A water heater, characterised by comprises: a water heater inner container; and the magnesium rod assembly as claimed in any one of claims 1-9, the magnesium rod assembly being arranged in the water heater inner container.

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