Resistor magnesium rod structure

Abstract

The utility model discloses a resistance magnesium rod structure, which relates to the technical field of water heaters and comprises a magnesium rod base body. A magnesium rod steel core is connected into the magnesium rod base body, and a fixing mechanism is arranged at the end, away from the first flat head, of the magnesium rod steel core. According to the utility model, the injection molding part base body is formed through injection molding, so that the magnesium rod base body, the magnesium rod steel core, the resistor and the leading-out steel core are formed into a whole through injection molding, and the injection molding part base body goes deep into the annular groove I on the magnesium rod steel core and the annular groove II on the leading-out steel core during injection molding, so that the magnesium rod steel core and the injection molding part base body are effectively prevented from loosening and separating; meanwhile, water is effectively prevented from infiltrating along the surface of the magnesium rod steel core to cause the resistor oxidation open circuit to cause the function failure of the whole magnesium rod, the lead-out steel core is effectively prevented from being loosened and separated from the injection molding part base body, and the water is effectively prevented from infiltrating along the surface of the lead-out steel core to cause the resistor oxidation open circuit to cause the magnesium rod failure; the steps can enhance the connecting strength of the magnesium rod base body and the injection molding piece base body, meanwhile, the path of water permeating into the steel core is prolonged, and the water seepage opportunity is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a resistance magnesium rod structure. Background Art

[0002] Magnesium rods are widely used in water storage electric water heaters as a protective measure to prevent inner tank corrosion. Magnesium rods are first corroded in water to become anodes and form a protective current with the inner tank, making the inner tank a cathode for corrosion protection. At the same time, magnesium rods are also constantly consumed. At present, the industry generally configures them according to the inner surface area of ​​the inner tank, and the conventional configuration standard is 200g / m 2 , usually it will be consumed in about 2 years. At this time, if the user can replace the magnesium rod in time, the inner tank will continue to be protected against corrosion. Otherwise, the inner tank will operate without electrochemical protection and rely entirely on the enamel layer for protection. However, it is difficult for the enamel layer to be completely free of defects. As long as there is a small defect, even a pinhole, water will enter and corrode the steel plate substrate of the inner tank until perforation and leakage.

[0003] The existing method of slowing down the consumption rate of magnesium rods is to connect a resistor in series with the magnesium rod to reduce the protection current. The common implementation method is to connect a resistor in series on the original magnesium rod and then lead it out through the lead screw, and form them into an integrated resistor magnesium rod by injection molding. It can realize the function of the resistor magnesium rod without changing the original assembly form;

[0004] However, in actual applications, magnesium rods often fail. The reason is that the resistor magnesium rod works under alternating hot and cold conditions in the inner tank. The injection molded parts and the magnesium rod, steel core, resistor, lead screws, etc. are separated due to inconsistent expansion coefficients of various materials. When the magnesium rod is corroded during use, the magnesium rod is separated from the injection molded parts, and water enters the surface of the steel core of the magnesium rod, and then reaches the resistor along the surface of the steel core, causing the resistor to oxidize and open the circuit, making the resistor magnesium rod fail. Utility Model Content

[0005] The utility model aims to provide a resistor magnesium rod structure to solve the technical problem in the prior art that the injection molded part and the magnesium rod, steel core, resistor, lead screw, etc. are separated due to the inconsistent expansion coefficients of the materials. When the magnesium rod is corroded during use, the magnesium rod is separated from the injection molded part, and water enters the surface of the steel core of the magnesium rod and then reaches the resistor along the surface of the steel core, causing the resistor to oxidize and open the circuit, resulting in the failure of the resistor magnesium rod.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] A resistor magnesium rod structure, comprising a magnesium rod matrix;

[0008] The magnesium rod matrix is ​​internally connected to a magnesium rod steel core, the magnesium rod steel core is provided with a flat head 1, the flat head 1 is arranged at the end of the magnesium rod steel core, and a fixing mechanism is provided at one end of the magnesium rod steel core away from the flat head 1;

[0009] The magnesium rod substrate is connected to an injection molded part substrate via a magnesium rod steel core, the fixing mechanism is connected inside the injection molded part substrate, and the injection molded part substrate wraps the magnesium rod substrate;

[0010] A resistor is connected to the magnesium rod steel core, and the end of the resistor away from the magnesium rod steel core is connected to a lead-out steel core. An annular groove 2 is provided at the end of the lead-out steel core close to the resistor, and a flat head 3 is connected to the end of the annular groove 2 close to the resistor. Threads are distributed on the end of the lead-out steel core away from the flat head 3. One pin of the resistor is connected to the flat head 2 on the magnesium rod steel core, and the other pin of the resistor is connected to the flat head 3 on the lead-out steel core.

[0011] As a further solution of the utility model: the fixing mechanism includes a flat head 2 and an annular groove 1, the flat head 2 is arranged at an end of the magnesium rod steel core away from the flat head 1, and the annular groove 1 is arranged on a side of the magnesium rod steel core close to the flat head 2.

[0012] As a further solution of the utility model: a step is provided at the connection end between the injection molded part substrate and the magnesium rod substrate, and the injection molded part substrate wraps the step.

[0013] As a further solution of the utility model: the resistor is a carbon film resistor and a metal film resistor.

[0014] As a further solution of the utility model: the magnesium rod steel core is made of stainless steel.

[0015] As a further solution of the utility model: the two pins of the resistor are electrically connected to the flat head two and the flat head three.

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model forms an injection molded part matrix by injection molding, so that the magnesium rod matrix, the magnesium rod steel core, the resistor, and the lead-out steel core are injection molded into a whole. During injection molding, the injection molded part matrix penetrates into the annular groove 1 on the magnesium rod steel core and the annular groove 2 on the lead-out steel core, effectively preventing the magnesium rod steel core from loosening and separating from the injection molded part matrix, and effectively preventing water from penetrating along the surface of the magnesium rod steel core to cause the resistor to oxidize and open the circuit, resulting in the failure of the entire magnesium rod function, effectively preventing the lead-out steel core from loosening and separating from the injection molded part matrix, and effectively preventing water from penetrating along the surface of the lead-out steel core to cause the resistor to oxidize and open the circuit, resulting in the failure of the magnesium rod. The step can strengthen the connection strength between the magnesium rod matrix and the injection molded part matrix, and at the same time extend the path for water to penetrate into the steel core, further reducing the chance of water seepage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 yes Figure 2 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1, magnesium rod base; 2, magnesium rod steel core; 3, resistor; 4, lead steel core; 5, injection molded part base; 11, step; 21, annular groove one; 22, flat head one; 23, flat head two; 41, annular groove two; 42, flat head three. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 3 As shown, a resistor magnesium rod structure comprises a magnesium rod matrix 1, wherein a magnesium rod steel core 2 is connected to the inside of the magnesium rod matrix 1, a flat head 22 is provided on the magnesium rod steel core 2, and the flat head 22 is arranged at the end of the magnesium rod steel core 2, and a fixing mechanism is provided at one end of the magnesium rod steel core 2 away from the flat head 22;

[0025] The fixing mechanism includes a flat head 23 and an annular groove 21, wherein the flat head 23 is arranged at an end of the magnesium rod steel core 2 away from the flat head 22, and the annular groove 21 is arranged at a side of the magnesium rod steel core 2 close to the flat head 23;

[0026] The magnesium rod matrix 1 is connected to an injection molded part matrix 5 through a magnesium rod steel core 2, the fixing mechanism is connected inside the injection molded part matrix 5, the injection molded part matrix 5 is wrapped around the magnesium rod matrix 1, the injection molded part matrix 5 and the magnesium rod matrix 1 are fixed by the fixing mechanism on the magnesium rod steel core 2, a step 11 is provided at the connection end between the injection molded part matrix 5 and the magnesium rod matrix 1, the injection molded part matrix 5 is wrapped around the step 11, the step 11 can strengthen the connection strength between the magnesium rod matrix 1 and the injection molded part matrix 5, and at the same time extend the path for water to penetrate into the magnesium rod steel core 2, thereby reducing the possibility of water seepage;

[0027] The magnesium rod steel core 2 is connected with a resistor 3, and the resistor 3 is a carbon film resistor and a metal film resistor. The resistance value of the resistor 3 is within 10-50Ω. The end of the resistor 3 away from the magnesium rod steel core 2 is connected with a lead-out steel core 4. The magnesium rod steel core 2 is made of stainless steel, which effectively prevents the lead-out steel core 4 from being oxidized on its surface after contacting water due to corrosion of the magnesium rod matrix 1 to form an insulating layer with the magnesium rod matrix 1. An annular groove 2 41 is provided at one end of the lead-out steel core 4 close to the resistor 3, and a flat head 3 42 is connected to the end of the annular groove 2 41 close to the resistor 3. Threads are distributed on the end of the lead-out steel core 4 away from the flat head 3 42. One pin of the resistor 3 is connected to the flat head 2 23 on the magnesium rod steel core 2, and the other pin of the resistor 3 is connected to the flat head 3 42 on the lead-out steel core 4. The two pins of the resistor 3 are electrically connected to the flat head 2 23 and the flat head 3 42.

[0028] The working principle of the utility model is as follows: the magnesium rod steel core 2 is inserted into the magnesium rod matrix 1, and the magnesium rod matrix 1 is formed into a contoured fit during the casting process through a flat head 22, which effectively prevents the lead-out steel core 4 from being displaced axially and circumferentially, and the injection molded part matrix 5 is formed by injection molding so that the magnesium rod matrix 1, the magnesium rod steel core 2, the resistor 3, and the lead-out steel core 4 are injection molded into a whole. During injection molding, the injection molded part matrix 5 penetrates into an annular groove 21 on the magnesium rod steel core 2, which effectively prevents the magnesium rod steel core 2 from loosening and separating from the injection molded part matrix 5, and at the same time effectively prevents water from penetrating along the surface of the magnesium rod steel core 2 to cause the resistor 3 to oxidize and open the circuit, resulting in the failure of the entire magnesium rod function, and the injection molded part matrix 5 penetrates into an annular groove 41 on the lead-out steel core 4, which effectively prevents the lead-out steel core 4 from loosening and separating from the injection molded part matrix 5. To prevent water from penetrating along the surface of the lead-out steel core 4, causing the resistor 3 to oxidize and open the circuit, resulting in failure of the magnesium rod, the magnesium rod base 1 is provided with a step 11 at the connection end with the injection molded part base 5, and the injection molded part base 5 wraps the step 11 of the magnesium rod base 1 to strengthen the connection strength between the magnesium rod base 1 and the injection molded part base 5, while extending the path for water to penetrate into the steel core, further reducing the chance of water seepage, and the magnesium rod steel core 2 is provided with a flat head 23 at one end connected to the injection molded part base 5, so that the injection molded part base 5 forms a contour fit with the magnesium rod steel core 2 during the injection molding process, effectively preventing the circumferential displacement of the magnesium rod steel core 2, and the lead-out steel core 4 is provided with a flat head 3 42 at one end connected to the injection molded part base 5, so that the injection molded part base 5 forms a contour fit with the lead-out steel core 4 during the injection molding process, effectively preventing the circumferential displacement of the lead-out steel core 4.

[0029] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A magnesium rod resistor structure, comprising a magnesium rod matrix (1); characterized in that: The magnesium rod base (1) is internally connected to a magnesium rod steel core (2), the magnesium rod steel core (2) is provided with a flat head (22), the flat head (22) is arranged at the end of the magnesium rod steel core (2), and a fixing mechanism is provided at one end of the magnesium rod steel core (2) away from the flat head (22); The magnesium rod base (1) is connected to an injection molded part base (5) via a magnesium rod steel core (2); the fixing mechanism is connected inside the injection molded part base (5); and the injection molded part base (5) is arranged to wrap the magnesium rod base (1); The magnesium rod steel core (2) is connected to a resistor (3), and one end of the resistor (3) away from the magnesium rod steel core (2) is connected to a lead-out steel core (4), and one end of the lead-out steel core (4) close to the resistor (3) is provided with an annular groove 2 (41), and one end of the annular groove 2 (41) close to the resistor (3) is connected to a flat head 3 (42), and one end of the lead-out steel core (4) away from the flat head 3 (42) is provided with threads, and one pin of the resistor (3) is connected to the flat head 2 (23) on the magnesium rod steel core (2), and the other pin of the resistor (3) is connected to the flat head 3 (42) on the lead-out steel core (4).

2. A magnesium resistance rod structure according to claim 1, characterized in that: The fixing mechanism comprises a flat head 2 (23) and an annular groove 1 (21), wherein the flat head 2 (23) is arranged at an end of the magnesium rod steel core (2) away from the flat head 1 (22), and the annular groove 1 (21) is arranged on a side of the magnesium rod steel core (2) close to the flat head 2 (23).

3. A magnesium resistance rod structure according to claim 1, characterized in that: A step (11) is provided at the connection end between the injection molded part base (5) and the magnesium rod base (1), and the injection molded part base (5) is arranged to wrap around the step (11).

4. A magnesium resistance rod structure according to claim 1, characterized in that: The resistor (3) is a carbon film resistor and a metal film resistor.

5. A magnesium resistance rod structure according to claim 1, characterized in that: The magnesium rod steel core (2) is made of stainless steel.

6. A magnesium resistance rod structure according to claim 1, characterized in that: The two pins of the resistor (3) are electrically connected to the flat head 2 (23) and the flat head 3 (42).

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