A heating element structure for a water heater with a reinforcing sleeve

Abstract

This utility model relates to the field of electrical technology and discloses a structure for a water heater heating element with a reinforced sleeve. It includes a chassis, multiple sleeves fixed to the top of the chassis, and connecting pipes inside the sleeves. The sleeve openings have outward-flaring flares to efficiently collect solder paste, ensuring even distribution at the connection between the sleeve and the connecting pipe, preventing local accumulation or loss, and reducing the likelihood of weld beads or material shortages during welding. Multiple arc-shaped seats are evenly distributed around the sleeve axis, with grooves inside each arc-shaped seat to fix a sealing ring. Connecting rods are provided between the arc-shaped seats. A return spring in the chamber pushes the connecting rods through a limiting seat, causing the arc-shaped seats to move closer to the connecting pipe, applying uniform and continuous pressure to the sealing ring, resulting in a tighter and more durable seal between the sealing ring and the connecting pipe, further improving sealing stability. The overall structure optimizes solder paste usage, reduces waste, ensures thorough welding, lowers rework rates, and saves material and labor costs; it also reduces the likelihood of solder paste slipping onto the conveyor belt and furnace.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a structure for an electric heating element with a reinforcing sleeve for a water heater. Background Technology

[0002] The current common solution for connecting the heating element and the reinforcing sleeve in water heaters is to straighten both ends of the reinforcing sleeve, tighten the tail end with hexagonal or octagonal sections after the heating element is installed, and then apply solder paste to fix it. The core of this solution is to improve the initial fixing strength by squeezing and tightening the tail end. It still uses the traditional solder paste welding method and has not optimized key issues such as solder paste retention and sealing performance. It has the same technical shortcomings as the industry's common solution.

[0003] The existing technology has four major problems:

[0004] First, the appearance is poor, welding is prone to weld beads and material shortages, requiring extra manpower for repairs, resulting in low product appearance consistency and weakening market competitiveness.

[0005] Secondly, the seal is weak, and micropores are easily formed at the connection. The leakage rate in the factory sealing test is 30%, which can easily cause short circuits and corrosion of the casing. Related after-sales complaints account for more than 35%.

[0006] Third, the cost is high. The solder paste cannot fully saturate the joint and slips off severely, resulting in a waste rate of 30% to 50%. Insufficient soldering leads to a rework rate of over 25%, increasing the cost of raw materials and labor.

[0007] Fourthly, equipment consumption is a concern. Slipping solder paste drips onto the conveyor belt and furnace, shortening the conveyor belt replacement cycle by 30% and increasing the furnace maintenance frequency by 40%, resulting in an annual equipment maintenance cost increase of approximately 20,000 yuan per production line. Utility Model Content

[0008] The technical problem to be solved by this utility model is the poor welding quality of the sleeve in the existing technology. To address this, we propose a structure for electric heating tubes in water heaters with reinforced sleeves.

[0009] To achieve the above objectives, this application adopts the following technical solution: a heating element structure for a water heater with a reinforced sleeve, comprising a chassis, a plurality of sleeves fixedly connected to the top of the chassis, a connecting pipe inside each sleeve, a sealing assembly between the sleeve and the connecting pipe, a flared opening at the sleeve opening, the sealing assembly comprising a plurality of arc-shaped seats, a sealing ring sleeved within the annulus formed by the plurality of arc-shaped seats, a plurality of connecting rods disposed between the plurality of arc-shaped seats, assembly chambers being formed on both sides of the interior of each arc-shaped seat, the two ends of the connecting rods extending into the assembly chambers of adjacent arc-shaped seats, a limiting seat fixedly connected to one end of the connecting rod located inside the assembly chamber, and a return spring sleeved on one end of the connecting rod located inside the assembly chamber, the return spring contacting the limiting seat at one end.

[0010] Preferably, the plurality of said arc-shaped seats are evenly distributed around the axis of the sleeve.

[0011] Preferably, the arc-shaped seat is provided with limiting members on the upper and lower sides.

[0012] Preferably, the arc-shaped seat has an assembly groove on the side near the connecting pipe.

[0013] Preferably, the outer ring wall of the sealing ring is fixedly connected to the wall of the assembly groove, and the inner ring wall of the sealing ring is in contact with the connecting pipe.

[0014] Preferably, the arc-shaped seat has connecting holes at both ends, and the connecting rod is slidably connected to the inner wall of the connecting hole.

[0015] Preferably, a positioning cylinder is sleeved on the other end of the reset spring, and the end of the positioning cylinder away from the reset spring is fixedly connected to the inner wall of the assembly cavity.

[0016] Preferably, the arc-shaped seat is fixedly connected to both sides with a sealing plate.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] This utility model relates to a reinforced sleeve structure for electric heating tubes in water heaters. Based on a chassis, multiple sleeves are fixed to the top of the chassis. Each sleeve contains a connecting pipe, and the sleeve opening has an outward-flaring flared end for efficient solder paste reception. This ensures even distribution of solder paste at the connection between the sleeve and the connecting pipe, preventing localized accumulation or loss. This fundamentally improves the poor appearance of existing structures, reducing the likelihood of weld beads or material shortages during welding, eliminating the need for additional manual finishing, and significantly enhancing product consistency and market competitiveness. Multiple arc-shaped seats are evenly distributed around the sleeve axis, with upper and lower limiters to prevent misalignment. A sealing ring is fixed in a mounting groove on the inner side of each arc-shaped seat, and the inner wall of the sealing ring is in close contact with the connecting pipe. The evenly distributed arc-shaped seats provide stable support for the sealing ring. Connecting rods are installed between the arc-shaped seats, and mounting chambers are opened on both sides of the arc-shaped seats. The ends of the connecting rods extend to adjacent chambers and connect to limiters. Return springs within the chambers push the connecting rods through the limiters, causing the arc-shaped seats to move closer to the connecting pipe, applying uniform and continuous pressure to the sealing ring. Sealing plates on both sides of the arc-shaped seats seal the chambers, preventing impurities from affecting component operation. This design ensures a tighter and more durable fit between the sealing ring and the connecting pipe, further enhancing sealing stability. The overall structure optimizes solder paste usage, reducing waste and ensuring thorough welding, lowering rework rates, and saving material and labor costs. It also reduces solder paste slippage onto the conveyor belt and furnace, extending the conveyor belt replacement cycle, reducing furnace maintenance frequency, and significantly reducing production line equipment maintenance costs. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the sleeve of this utility model;

[0023] Figure 4 This is a schematic diagram of the sealing component structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the exploded structure of the sealing component of this utility model.

[0025] Legend: 1. Chassis; 2. Sleeve; 201. Flared mouth; 3. Connecting pipe; 4. Sealing assembly; 401. Arc-shaped seat; 402. Assembly groove; 403. Sealing ring; 404. Assembly chamber; 405. Connecting rod; 406. Connecting hole; 407. Limiting seat; 408. Return spring; 409. Positioning cylinder; 410. Sealing plate. Detailed Implementation

[0026] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0027] Reference Figures 1 to 5As shown, this utility model provides a technical solution: a heating element structure for a water heater with a reinforced sleeve, including a base 1. Multiple sleeves 2 are fixedly connected to the top of the base 1. Connecting pipes 3 are embedded within the sleeves 2. A sealing component 4 is provided between the sleeves 2 and the connecting pipes 3. The opening of the sleeve 2 has a flared opening 201, which is formed by folding the opening outwards at the connection point. From a working principle perspective, this outward-flared flared opening 201 can more efficiently receive solder paste, allowing the solder paste to be more evenly distributed at the connection between the sleeve 2 and the connecting pipe 3 during welding, avoiding local accumulation or loss of solder paste due to an unreasonable opening shape. Its advantages are significant, effectively improving the poor appearance of existing structures: due to the good solder paste reception and even distribution, weld beads or material shortages are less likely to occur during welding, eliminating the need for additional manpower for subsequent repairs, greatly improving product appearance consistency, and thus enhancing the product's competitiveness in the market.

[0028] The sealing assembly 4 includes multiple arc-shaped seats 401, which are evenly distributed around the axis of the sleeve 2. Limiting elements are provided on the upper and lower sides of the arc-shaped seats 401. An assembly groove 402 is provided on the side of the arc-shaped seats 401 near the connecting pipe 3. A sealing ring 403 is fitted inside the annulus formed by the multiple arc-shaped seats 401. The outer ring wall of the sealing ring 403 is fixedly connected to the groove wall of the assembly groove 402, and the inner ring wall of the sealing ring 403 is in contact with the connecting pipe 3. The evenly distributed arc-shaped seats 401 provide stable support for the sealing ring 403. The limiting elements on the upper and lower sides can restrict the position of the arc-shaped seats 401 to prevent them from shifting up and down during use, ensuring that the sealing ring 403 always maintains contact with the connecting pipe 3, forming a reliable initial sealing barrier to prevent external moisture and impurities from entering the interior of the sleeve 2. The advantage of this design is that it solves the problem of weak sealing in existing structures: the sealing ring 403 is in close contact with the connecting pipe 3, and the support of the arc-shaped seat 401 ensures the stability of the sealing position. It is difficult for micropores to form at the connection, which effectively avoids short circuits and shell corrosion caused by water leakage, and greatly reduces related after-sales complaints.

[0029] Furthermore, multiple connecting rods 405 are provided between multiple arc-shaped seats 401. Assembly chambers 404 are opened on both sides inside the arc-shaped seats 401. The two ends of the connecting rods 405 extend into the assembly chambers 404 of adjacent arc-shaped seats 401. One end of the connecting rod 405 located inside the assembly chamber 404 is fixedly connected to a limiting seat 407. The two ends of the arc-shaped seats 401 are provided with connecting holes 406. The connecting rod 405 is slidably connected to the inner wall of the connecting hole 406. A return spring 408 is sleeved on one end of the connecting rod 405 located inside the assembly chamber 404. One end of the return spring 408 contacts the limiting seat 407. The other end of the return spring 408 is sleeved with a positioning cylinder 409. The end of the positioning cylinder 409 away from the return spring 408 is fixedly connected to the inner wall of the assembly chamber 404. A closing plate 410 is fixedly connected to both sides of the arc-shaped seats 401. The sealing plate 410 seals the assembly chamber 404, preventing dust and impurities from entering and affecting the operation of internal components. In its natural state, the return spring 408 exerts a pushing force on the limiting seat 407. The limiting seat 407 drives the connecting rod 405 to move within the connecting hole 406, thereby pushing the arc-shaped seat 401 towards the connecting pipe 3. Due to the rigidity of the arc-shaped seat 401, under the continuous drive of the return spring 408, the arc-shaped seat 401 applies uniform and continuous pressure to the sealing ring 403, making the sealing ring 403 fit more tightly with the connecting pipe 3. This further enhances the sealing effect; the rigid arc-shaped seat 401, in conjunction with the return spring 408, ensures a more stable and lasting tight fit between the sealing ring 403 and the connecting pipe 3.

[0030] The integral sleeve 2 optimizes the use of solder paste, and the sealing component 4 fits tightly with the connecting pipe 3, so that the solder paste can fully fill the connection and is not easy to slip off, reducing waste. At the same time, it ensures full welding, reduces the rework rate, and saves raw material and labor costs. It also reduces equipment wear and tear, reduces the slippage of solder paste, and avoids it dripping onto the conveyor belt and furnace, extending the replacement cycle of the conveyor belt, reducing the frequency of furnace maintenance, and reducing the maintenance cost of production line equipment.

[0031] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An electric heating tube with a reinforcing sleeve structure for a water heater, characterized in that, The device includes a chassis, with multiple sleeves fixedly connected to the top of the chassis. Each sleeve contains a connecting tube, and a sealing assembly is provided between the sleeve and the connecting tube. The sleeve opening has a flared opening, and the sealing assembly includes multiple arc-shaped seats. A sealing ring is fitted inside the annulus formed by the multiple arc-shaped seats, and multiple connecting rods are provided between the multiple arc-shaped seats. Assembly chambers are opened on both sides inside the arc-shaped seats. Both ends of the connecting rods extend into the assembly chambers of adjacent arc-shaped seats. A limit seat is fixedly connected to one end of the connecting rod inside the assembly chamber, and a return spring is sleeved on the other end of the connecting rod inside the assembly chamber. One end of the return spring contacts the limit seat.

2. The electric heating tube with reinforced sleeve structure for water heater according to claim 1, characterized in that: The multiple arc-shaped seats are evenly distributed around the axis of the sleeve.

3. The electric heating tube with reinforced sleeve structure for water heater according to claim 1, characterized in that: Limiting devices are provided on the upper and lower sides of the arc-shaped seat.

4. The electric heating tube with reinforced sleeve structure for water heater according to claim 1, characterized in that: The arc-shaped seat has an assembly groove on the side near the connecting pipe.

5. The electric heating tube with reinforced sleeve structure for water heater according to claim 1, characterized in that: The outer ring wall of the sealing ring is fixedly connected to the wall of the assembly groove, and the inner ring wall of the sealing ring is in contact with the connecting pipe.

6. The electric heating element with reinforcing sleeve structure for water heaters according to claim 1, characterized in that: The arc-shaped seat has connecting holes at both ends, and the connecting rod is slidably connected to the inner wall of the connecting hole.

7. The electric heating element with reinforcing sleeve structure for water heaters according to claim 1, characterized in that: The other end of the reset spring is fitted with a positioning cylinder, and the end of the positioning cylinder away from the reset spring is fixedly connected to the inner wall of the assembly cavity.

8. The electric heating element with reinforcing sleeve structure for water heaters according to claim 1, characterized in that: The arc-shaped seat is fixedly connected to both sides with a sealing plate.

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