Bent and reinforced metal fire grate for gas water heater

Abstract

This utility model discloses a sheet metal burner for a gas water heater reinforced by bending, comprising: a first single-layer sheet; a second single-layer sheet, the first and second single-layer sheets being arranged in a mirror-symmetrical manner, forming a gas passage between them, with the two ends of the gas passage being an air inlet and a flame outlet, respectively; a bent tongue, the root of which is integrally connected to the edge of the second single-layer sheet, the bent tongue and the second single-layer sheet being connected in a U-shape, the bent tongue hooking onto the edge of the first single-layer sheet; and a concave-convex fitting portion, the surface of the first single-layer sheet having an outward convex area, and the surface of the second single-layer sheet having an inward concave area, the outward convex area and the inward concave area fitting together; wherein, there are several bent tongues, distributed on both sides of the air inlet end, the boundary line between the bent tongue and the second single-layer sheet being a bending line, and some of the bending lines forming an angle with each other. This utility model achieves a firm connection and tight seal between the two sheet metal sheets through the hooking of the bent tongues and the concave-convex fitting.

Description

Technical Field

[0001] This utility model relates to the field of stamped sheet metal parts, specifically to a sheet metal burner for a gas water heater that is reinforced by bending. Background Technology

[0002] A gas water heater works by heating water continuously flowing through a coil through combustion, thus raising the cold water to the required temperature. A core component of a gas water heater is the burner, whose function is to thoroughly mix gas and air, burn the gas, and transfer the heat generated to the heat exchanger. The burner is typically made of high-temperature resistant stamped metal, and the stamping process allows for the creation of complex shapes.

[0003] Most existing gas water heater burners employ a sheet metal, half-and-half clasp design, consisting of two symmetrical clasps fixed together by snaps, spot welding, or bolts. This structure is widely used in the industry due to its simple manufacturing process and convenient assembly. However, in actual production and use, some technical defects exist. The fixing strength of the clasps directly depends on the structural stability of the connection point. Long-term exposure to gas combustion vibrations, transportation bumps, or thermal expansion and contraction can easily cause the connection point to loosen, shift, or even detach. Failure to fix the clasps can lead to a decrease in the sealing of the internal gas passage of the burner, potentially causing gas leaks, disrupting the gas-air mixture ratio, resulting in incomplete combustion, backfire, and other problems. In severe cases, this can shorten the burner's lifespan and even cause safety accidents. Therefore, researchers need to develop effective, tailored solutions to address the fixing strength issues of clasped burners. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a sheet metal burner for a gas water heater that is reinforced by bending.

[0005] To solve the above problems, this utility model provides a sheet metal burner for a gas water heater that is reinforced by bending. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows: A sheet metal burner for a gas water heater reinforced by bending includes: a first single-layer sheet; a second single-layer sheet, the first and second single-layer sheets being arranged in a mirror-symmetrical manner, forming a gas passage between the first and second single-layer sheets, the two ends of the gas passage being an air inlet and a flame outlet, respectively; a bent tongue, the root of which is integrally connected to the edge of the second single-layer sheet, the bent tongue and the second single-layer sheet being connected in a U-shape, the bent tongue hooking the edge of the first single-layer sheet; and a concave-convex fitting portion, the surface of the first single-layer sheet having an outward convex area, the surface of the second single-layer sheet having an inward concave area, the outward convex area and the inward concave area fitting together; wherein, there are several bent tongues, the several bent tongues being distributed on both sides of the air inlet end, the boundary line between the bent tongue and the second single-layer sheet being a bending line, and among the several bending lines, there are bending lines that form an angle with each other.

[0006] As a further improvement of this utility model, the number of bent tongues on both sides of the air intake end is equal.

[0007] As a further improvement of this utility model, among the several bent tongues on the same side of the air intake end, the bending lines of some of the bent tongues form right angles with each other.

[0008] As a further improvement of this utility model, the shape of the bent tongue is an isosceles trapezoid or a right trapezoid.

[0009] As a further improvement of this utility model, the bending tongue corresponding to the shortest bending line has a right-angled trapezoidal outline.

[0010] As a further improvement of this utility model, the bending tongue includes a first bending tongue, a second bending tongue, a third bending tongue, a fourth bending tongue, a fifth bending tongue, and a sixth bending tongue arranged sequentially along the edge of the second single-layer sheet; the bending lines corresponding to the first bending tongue and the third bending tongue are perpendicular to the bending line corresponding to the second bending tongue; the bending line corresponding to the fourth bending tongue is perpendicular to the bending line corresponding to the fifth bending tongue.

[0011] As a further improvement of this utility model, the concave-convex fitting part is in two places, and is located on both sides of the airway respectively.

[0012] As a further improvement of this utility model, the fire outlet end is provided with an end plate, and a plurality of output slots are arranged in parallel on the end plate, the length direction of the output slots being perpendicular to the length direction of the end plate.

[0013] As a further improvement of this utility model, the first single-layer sheet and the second single-layer sheet are provided with snap-fit ​​seams in the end areas of the firing end. The length direction of the snap-fit ​​seam is perpendicular to the length direction of the output seam, and the snap-fit ​​seams of the first single-layer sheet and the snap-fit ​​seams of the second single-layer sheet are provided in a one-to-one correspondence.

[0014] The beneficial technical effects of the sheet metal burner of the gas water heater reinforced by bending as described in this application are: The bent tongue is integrally formed with the second single-layer sheet and hooks onto the edge of the first single-layer sheet in a U-shape. Several bent tongues are distributed on both sides of the air intake end. With the design of the bent lines that form an angle with each other, the connection strength between the first and second single-layer sheets is greatly improved, effectively resisting the effects of gas combustion vibration, transportation bumps and thermal expansion and contraction, and avoiding loosening or displacement of the connection point.

[0015] The concave-convex fitting part, through the precise matching of the outer convex area and the inner concave area, makes the two single-layer sheets fit more tightly, further ensuring the airtightness of the gas passage and reducing the risk of gas leakage.

[0016] The bent tongue and the concave-convex interlocking parts are distributed in different positions to achieve similar functions in different forms, namely, the fixing function.

[0017] The U-shaped structure of the bending tongue and the design of the concave-convex interlocking part are both compatible with sheet metal stamping and bending processes, without the need for additional complex processing steps. While achieving structural reinforcement, it maintains the convenience of sheet metal processing, and takes into account both structural reliability and production adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of one embodiment of the present utility model; Figure 2 This is a partial enlarged view of point A in one embodiment of this utility model; Figure 3 This is a partial enlarged view of section B of one embodiment of this utility model; Figure 4 This is a perspective view of one embodiment of the present utility model; Figure 5 This is a partial enlarged view of point C in one embodiment of this utility model; Figure 6 This is a partial enlarged view of point D in one embodiment of this utility model; Figure 7 This is a perspective view of one embodiment of the present utility model; Figure 8 This is a perspective view of the second single-layer sheet according to one embodiment of the present invention.

[0020] 1-First single-layer sheet; 2-Second single-layer sheet; 3-End plate; 4-Output seam; 5-Inlet; 6-Air passage; 7-Outward convex area; 8-Inward concave area; 9-Seam; 10-First bent tongue; 11-Second bent tongue; 12-Third bent tongue; 13-Fourth bent tongue; 14-Fifth bent tongue; 15-Sixth bent tongue. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments: In order to achieve the purpose of this utility model, such as Figure 1 , Figure 7 , Figure 8 As shown, a sheet metal burner for a gas water heater reinforced by bending includes: a first single-layer sheet 1; a second single-layer sheet 2; the first single-layer sheet 1 and the second single-layer sheet 2 are arranged in a mirror-symmetrical manner, forming a gas passage 6 between the first single-layer sheet 1 and the second single-layer sheet 2, with the two ends of the gas passage 6 being an air inlet and a flame outlet, respectively. The air inlet is also known as an air inlet 5. The facing surfaces of the first single-layer sheet 1 and the second single-layer sheet 2 have inner grooves, and the two inner grooves are joined together to form the gas passage 6. A bent tongue, the root of which is integrally connected to the edge of the second single-layer sheet 2, the bent tongue and the second single-layer sheet 2 are connected in a U-shape, and the bent tongue hooks onto the edge of the first single-layer sheet 1. A concave-convex fitting part, the surface of the first single-layer sheet 1 has an outward convex area 7, and the surface of the second single-layer sheet 2 has an inward concave area 8, the outward convex area 7 and the inward concave area 8 are in concave-convex fit together. Among them, there are several bent tongues, which are distributed on both sides of the air intake end. The boundary line between the bent tongue and the second single-layer plate 2 is a bent line. Among the several bent lines, there are bent lines that form an angle with each other.

[0022] One side of the bent tongue makes surface contact with one side of the first single-layer sheet 1, that is, the vertical distance between the bent tongue and the second single-layer sheet 2 is equal to the thickness of the first single-layer sheet 1.

[0023] The beneficial effects of adopting the above technical solution are as follows: There are two methods for fixing the first single-layer sheet 1 and the second single-layer sheet 2. First, it mainly relies on a bending tongue. The U-shaped bending tongue is easy to distribute along the edge of the second single-layer sheet 2, thereby fixing the edges of the first single-layer sheet 1 and the second single-layer sheet 2, and can adapt to the shape contours of the first single-layer sheet 1 and the second single-layer sheet 2. Second, it uses a concave-convex fitting part. The bending tongue is suitable for being arranged at the edge, while the concave-convex fitting part is suitable for being arranged inside, ensuring that the first single-layer sheet 1 and the second single-layer sheet 2 are firmly connected near the concave-convex fitting part. In addition, the forms of the bending tongue and the concave-convex fitting part are easy to form using a stamping and bending process.

[0024] In some other embodiments of this invention, the number of bent tongues on both sides of the air intake end is equal.

[0025] The beneficial effects of adopting the above technical solution are: by making the number of bent tongues on both sides of the air intake end equal, the first single-layer plate 1 and the second single-layer plate 2 are ensured to be balanced and symmetrically fixed in the air intake 5 area, avoiding assembly stress concentration or structural skew caused by uneven distribution of fixing points, thereby improving the stability of the overall structure.

[0026] In some other embodiments of this utility model, among the several bent tongues on the same side of the air intake end, the bending lines of some of the bent tongues form right angles with each other.

[0027] The beneficial effects of adopting the above technical solution are that the bending tongue can constrain the first single-layer sheet 1 from different directions. This multi-directional locking effect can more effectively resist vibration or deformation forces from different planes, prevent loosening at the connection, and further enhance the stability of the local connection.

[0028] In some other embodiments of this utility model, the shape of the bent tongue is an isosceles trapezoid or a right trapezoid.

[0029] The beneficial effects of adopting the above technical solution are: its contour is more adaptable to sheet metal stamping and bending processes. This shape is easy to process and can form good surface contact with the edge of the first single-layer sheet 1. While ensuring hook strength, it helps to disperse stress and avoid stress concentration at sharp corners that could lead to sheet metal cracking.

[0030] like Figure 2 As shown, in some other embodiments of this utility model, the bending tongue corresponding to the shortest bending line has a right-angled trapezoidal outline.

[0031] The beneficial effects of adopting the above technical solution are: it is specifically stipulated that the bending tongue corresponding to the shortest bending line adopts a right-angled trapezoidal profile. In the narrowest area of ​​edge space, the right-angled trapezoid can make more efficient use of the limited material width for bending and hooking than the isosceles trapezoid, ensuring that even the smallest bending tongue has sufficient connection strength, thus achieving optimized design under local space constraints.

[0032] like Figure 8 As shown, in some other embodiments of this utility model, the bending tongue includes a first bending tongue 10, a second bending tongue 11, a third bending tongue 12, a fourth bending tongue 13, a fifth bending tongue 14, and a sixth bending tongue 15 arranged sequentially along the edge of the second single-layer sheet 2. The bending lines corresponding to the first bending tongue 10 and the third bending tongue 12 are perpendicular to the bending line corresponding to the second bending tongue 11. The bending line corresponding to the fourth bending tongue 13 is perpendicular to the bending line corresponding to the fifth bending tongue 14.

[0033] The beneficial effects of adopting the above technical solution are as follows: By specifically defining the arrangement of the six bent tongues, including the first bent tongue 10 and the second bent tongue 11, and the vertical relationship between their bending lines, a regular, interlocking reinforcement network is constructed on both sides of the air intake end. This systematic layout can evenly and orderly distribute the locking force, constrain the relative position of the two single-layer plates from multiple dimensions, and significantly improve the overall connection stiffness and deformation resistance of the air intake end area.

[0034] like Figure 7 As shown, in some other embodiments of this utility model, there are two concave-convex fitting portions, which are located on both sides of the airway 6 respectively.

[0035] The beneficial effects of adopting the above technical solution are as follows: Two interlocking parts, located on both sides of the gas passage 6, form symmetrical reinforcement points in the critical area inside the burner. These two interlocking parts, in conjunction with the bent tongue at the edge, ensure that the first single-layer sheet 1 and the second single-layer sheet 2 fit tightly around the entire periphery of the gas passage 6, greatly guaranteeing the sealing integrity of the gas passage 6 and fundamentally reducing the risk of gas leakage.

[0036] like Figure 7 As shown, in some other embodiments of this utility model, the fire outlet end has an end plate 3, and a plurality of output slots 4 are arranged in parallel on the end plate 3, the length direction of the output slots 4 being perpendicular to the length direction of the end plate 3.

[0037] The beneficial effects of adopting the above technical solution are: the output slit 4 can divide the flame into multiple uniform and slender flames before they are ejected. This structure is conducive to forming a stable and regular fire curtain, promoting the full mixing and combustion of gas and air, thereby improving combustion efficiency and ensuring flame stability.

[0038] like Figure 7 , Figure 8 As shown, in some other embodiments of this utility model, the first single-layer sheet 1 and the second single-layer sheet 2 are provided with snap-fit ​​seams 9 at the end regions of the firing end. The length direction of the snap-fit ​​seam 9 is perpendicular to the length direction of the output seam 4. The snap-fit ​​seams 9 of the first single-layer sheet 1 and the snap-fit ​​seams 9 of the second single-layer sheet 2 are provided in a one-to-one correspondence.

[0039] The beneficial effect of adopting the above technical solution is that the snap joint 9 can fix other components, such as the grille inside the fire bar.

[0040] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A sheet metal burner for a gas water heater reinforced with bending, characterized in that, include: First single-layer film; The second single-layer sheet is arranged in a mirror-symmetric manner with the first single-layer sheet and the second single-layer sheet. An air passage is formed between the first single-layer sheet and the second single-layer sheet, and the two ends of the air passage are the air inlet end and the flame outlet end, respectively. A bent tongue, the root of which is integrally connected to the edge of the second single-layer sheet, the bent tongue and the second single-layer sheet are connected in a U-shape, and the bent tongue hooks onto the edge of the first single-layer sheet; The concave-convex fitting portion has an outwardly convex area on the surface of the first single-layer sheet and an inwardly concave area on the surface of the second single-layer sheet, wherein the outwardly convex area and the inwardly concave area fit together. The bent tongue is a plurality of such tongues, which are distributed on both sides of the air intake end. The boundary line between the bent tongue and the second single-layer plate is a bent line. Among the plurality of bent lines, there are bent lines that form an angle with each other.

2. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: The number of bent tongues on both sides of the air intake is equal.

3. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: Among the several bent tongues on the same side of the air intake end, the bending lines of some of the bent tongues form right angles with each other.

4. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: The shape of the bent tongue is an isosceles trapezoid or a right trapezoid.

5. The sheet metal burner of a gas water heater reinforced by bending as described in claim 4, characterized in that: The bend tongue with the shortest bend line has a right-angled trapezoidal outline.

6. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: The bending tongue includes a first bending tongue, a second bending tongue, a third bending tongue, a fourth bending tongue, a fifth bending tongue, and a sixth bending tongue arranged sequentially along the edge of the second single-layer sheet in one direction; The bending lines corresponding to the first and third bending tongues are perpendicular to the bending line corresponding to the second bending tongue. The bending line corresponding to the fourth bending tongue is perpendicular to the bending line corresponding to the fifth bending tongue.

7. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: The concave-convex fitting part is located in two places, respectively on both sides of the airway.

8. The sheet metal burner of a gas water heater reinforced by bending as described in claim 1, characterized in that: The fire outlet end has an end plate, and several output slots are arranged in parallel on the end plate. The length direction of the output slots is perpendicular to the length direction of the end plate.

9. The sheet metal burner of a gas water heater reinforced by bending as described in claim 8, characterized in that: The first and second single-layer sheets are provided with snap-fit ​​seams at the end regions of the firing end. The length direction of the snap-fit ​​seam is perpendicular to the length direction of the output seam. The snap-fit ​​seams of the first and second single-layer sheets are provided in a one-to-one correspondence.

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