Reinforced high-pressure-bearing expansion tank

Abstract

According to the reinforced high-pressure-bearing expansion water tank, the riveting edges of the two shells and the clamping edge of the elastic diaphragm are wrapped and pressed at the same time through the combination of the multiple sets of riveting pressing rings, and under the condition that the thickness quality of raw materials and the performance of a machining machine do not need to be improved, the machining efficiency is improved; the riveting position between the upper shell and the lower shell and the stability of the elastic diaphragm in the containing cavity are guaranteed, meanwhile, the clamping edge of the elastic diaphragm deforms under the action of pressure and serves as a sealing filling structure between the two spliced shells, and the overall sealing performance is guaranteed. Besides, the pressure-bearing capacity of the expansion water tank is improved through outwards-extending radian protrusions on the outer end faces of the upper shell and the lower shell and pressure-bearing ribs on the inner surfaces of the radian protrusions, the strip-shaped stabilizing ribs arranged on the surface of the isolation face of the elastic diaphragm can prevent noise from being generated when the space of the air containing cavity and the space of the water containing cavity are adjusted, and meanwhile the service life of the elastic diaphragm is prolonged; the expansion water tank is more stable in overall work, longer in service life and higher in safety performance.

Description

Technical Field

[0001] This utility model belongs to the field of expansion tank technology, specifically relating to a reinforced high-pressure expansion tank. Background Technology

[0002] Expansion tanks are crucial components in wall-hung boilers and HVAC systems. In heating systems, they serve both water storage and pressure regulation functions. Due to the thermal expansion and contraction of water in the heating system, the water volume increases as the system heats up. When there is nowhere to accommodate this expansion, the water pressure within the heating system rises, affecting normal operation. The expansion tank accommodates this expansion, reducing pressure fluctuations caused by water expansion. When the system leaks or cools down for any reason, the expansion tank replenishes the system. Therefore, the point where the expansion tank connects to the system is often used as a pressure regulation or constant pressure point, ensuring the system does not empty, overflow, or overpressure, thus improving the safety and reliability of system operation. Expansion tanks are typically connected to the inlet of water pumps. Through their pressure-regulating function, they provide some protection for the pump. Currently, there are two types of expansion tanks: one-piece molded tanks and multi-shell assembled tanks. Multi-shell assembled expansion tanks have higher production efficiency than one-piece molded tanks. However, because they are subjected to continuous and repeated high pressure during operation, the end faces of the expansion tank are prone to deformation under the impact of gas-liquid expansion. Furthermore, the load-bearing capacity at the joints between the shells is weak, potentially leading to loosening or even separation between the shells. Simply increasing the thickness of each shell to improve its pressure-bearing capacity would require higher requirements for raw materials and processing machinery, increasing production costs.

[0003] In response to the aforementioned phenomena and problems, this study proposes a reinforced high-pressure expansion tank that enhances the tightness and stability of the connections between the various shells of the expansion tank while improving its pressure-bearing capacity. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a reinforced high-pressure expansion tank. It features a special riveting structure to enhance the tightness and stability of the connections between the various shells of the expansion tank. Additionally, it incorporates a special outer end face that works in conjunction with a multi-cavity airbag to improve the pressure resistance of the expansion tank.

[0005] To achieve the above objectives, this utility model provides a reinforced high-pressure expansion tank, comprising an upper shell, a lower shell, an elastic diaphragm, a riveting ring, an inflation nozzle, and a liquid receiving pipe. Both the upper and lower shells include an outwardly extending protruding outer end face with a specific curvature, a side wall surrounding the outer end face, and a riveting edge located at the outer edge of the side wall. The riveting edges of the upper and lower shells are oppositely arranged and tightly fixed within the riveting ring. A receiving cavity is formed between the upper and lower shells. The elastic diaphragm is disposed within the receiving cavity and divides the cavity into an adjustable-size air receiving cavity and a water receiving cavity. Specifically, it includes an isolation surface and clamping edges surrounding the isolation surface. The isolation surface has several strip-shaped stabilizing ribs, and the clamping edges are clamped between the riveting edges of the upper and lower shells. The air receiving cavity is connected to the inflation nozzle, and the water receiving cavity is connected to the liquid receiving pipe.

[0006] Preferably, the riveting pressure ring includes a left riveting pressure ring and a right riveting pressure ring arranged symmetrically. The cross-sections of the left riveting pressure ring and the right riveting pressure ring are both C-shaped, and their cross-sectional wall thickness is 1 to 1.5 times the cross-sectional wall thickness of the side wall.

[0007] Preferably, the overall cross-section of the elastic diaphragm is U-shaped.

[0008] Preferably, the strip-shaped stabilizing ribs are parallel to the longer edges of the upper and lower shells and are equidistantly distributed on the surface of the isolation surface.

[0009] Preferably, the inner surfaces of both the upper and lower shells are provided with a plurality of pressure-bearing ribs arranged in a grid pattern at equal intervals.

[0010] Preferably, the gas-containing cavity is configured as the space near the upper housing, and the water-containing cavity is configured as the space near the lower housing.

[0011] Preferably, the inflation nozzle passes through the upper shell and is connected to the air receiving cavity, and a cover is also provided on its outer side.

[0012] Preferably, the liquid receiving pipe passes through the lower shell and is connected to the water receiving cavity.

[0013] Preferably, both the upper and lower shells are integrally formed from reinforcing plates.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a reinforced high-pressure expansion tank, in which the upper shell and lower shell are symmetrically arranged, the elastic diaphragm is disposed between the two shells, the outer edge is clamped between two riveted edges, and is wrapped and fixed by two sets of symmetrically arranged C-shaped riveting pressure rings, forming a receiving cavity between the upper shell and the lower shell. The outer end faces of both shells extend outward with a specific arc, and the inner surfaces are provided with pressure-bearing ribs distributed in a grid at equal intervals. The receiving cavity is divided by the elastic diaphragm into an air receiving cavity and a water receiving cavity with adjustable spatial size. The air receiving cavity is connected to the air inlet, and the water receiving cavity is connected to the liquid receiving pipe. The elastic diaphragm is composed of an isolation surface with several strip-shaped stabilizing ribs and clamping edges disposed around the isolation surface. In this patented solution, multiple sets of riveting pressure rings are combined to simultaneously wrap and press the riveted edges of the two shells and the clamping edges of the elastic diaphragm. This ensures the stability of the riveting position between the upper and lower shells and the elastic diaphragm within the receiving cavity without requiring improvements in raw material thickness or processing machine performance. Simultaneously, the clamping edges of the elastic diaphragm deform under pressure, acting as a sealing and filling structure between the two shells, guaranteeing overall sealing. Furthermore, the outwardly extending arcuate protrusions on the outer end faces of the upper and lower shells and the pressure-bearing ribs on their inner surfaces enhance the expansion tank's pressure-bearing capacity. The strip-shaped stabilizing ribs on the surface of the elastic diaphragm prevent noise generation when adjusting the space between the air and water receiving cavities, while also extending the service life of the elastic diaphragm. This results in a more stable overall operation of the expansion tank, a longer service life, and higher safety performance. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a reinforced high-pressure expansion tank according to the present invention.

[0016] In the diagram: 1-Upper shell, 2-Lower shell, 3-Outer end face, 4-Side wall surface, 5-Riveting edge, 6-Pressure bearing rib, 7-Gas receiving cavity, 8-Water receiving cavity, 9-Elastic diaphragm, 10-Isolation surface, 11-Clamping edge, 12-Strip stabilizing rib, 13-Riveting pressure ring, 14-Inflation nozzle, 15-Baffle, 16-Liquid receiving pipe. Detailed Implementation

[0017] To provide a more detailed description of this utility model, the following description is provided in conjunction with the accompanying drawings. It should be noted that the embodiments described below are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] See Figure 1This embodiment provides a reinforced high-pressure expansion tank, including an upper shell 1, a lower shell 2, an elastic diaphragm 9, a riveted pressure ring 13, an air inlet 14, a liquid receiving pipe 16, and a receiving cavity between the upper shell 1 and the lower shell 2.

[0019] Both the upper shell 1 and the lower shell 2 are integrally formed from reinforcing plates, and each includes an outer end face 3, a side wall surface 4, and a riveting edge 5. The outer end face 3 extends outward with a specific arc to evenly bear pressure from different directions, improving the pressure-bearing capacity of the outer end face 3 and preventing the expansion tank from deforming under pressure. The side wall surface 4 is arranged around the outer end face 3, and the riveting edge 5 is arranged perpendicularly to the outer edge of the side wall surface 4. The inner surfaces of the outer end face 3 and the side wall surface 4 are provided with several pressure-bearing ribs 6 arranged in a grid at equal intervals. The riveting pressure ring 13 includes a left riveting pressure ring and a right riveting pressure ring. The cross-section of the left riveting pressure ring and the right riveting pressure ring is C-shaped, and the wall thickness of the cross-section is 1 to 1.5 times that of the wall thickness of the side wall surface 4. The flat top view is also C-shaped to help strengthen the tightness and stability of the connection between the shells of the expansion tank.

[0020] In this embodiment, the inner sides of the outer end faces 3 of the upper shell 1 and the lower shell 2 are placed opposite each other. The elastic diaphragm 9 is placed between the upper shell 1 and the lower shell 2, that is, the riveting edge 5 of the upper shell 1, the clamping edge 11 of the elastic diaphragm 9, and the riveting edge 5 of the lower shell 2 are arranged sequentially from top to bottom. The left and right riveting pressure rings symmetrically wrap around the connection between the upper shell 1 and the lower shell 2, that is, they are tightly wrapped and fixed to the outside of the riveting edge 5, so as to achieve a stable splicing and fixing of the upper shell 1 and the lower shell 2. At this time, the upper shell 1 and the lower shell 2 are... The cavity formed by the elastic diaphragm 9 is divided into an adjustable-size gas cavity 7 and a water cavity 8. The gas cavity 7 is filled with pressurized gas and is located near the upper shell 1. It is connected to the outside through an inflation nozzle 14 that penetrates the upper shell 1. A cover 15 is also provided on the outside of the inflation nozzle 14. The water cavity 8 is filled with replenishing water liquid and is located near the lower shell 2. It is connected to other components of the hot water supply system through a liquid receiving pipe 16 that penetrates the lower shell 2.

[0021] In this embodiment, the elastic diaphragm 9 is disposed in the receiving cavity and is made of NBR rubber. Its overall cross-section is U-shaped, specifically including an isolation surface 10 and clamping edges 11 disposed around the isolation surface 10. The isolation surface 10 is approximately parallel to the outer end face 3 and is the same size as the inner side of the outer end face 3. Several strip-shaped stabilizing ribs 12 are disposed on its surface. The strip-shaped stabilizing ribs 12 are parallel to the longer edges of the upper shell 1 and the lower shell 2 and are equidistantly distributed on the surface of the isolation surface 10, which can improve the service life of the elastic diaphragm 9. At the same time, in the normal initial state, the isolation surface 10 of the elastic diaphragm 9 is tightly attached to the inner side of the shell on the side of the water receiving cavity 8. Once water enters and separates the isolation surface 10 of the elastic diaphragm 9 from the inner side of the shell, a tearing sound may be emitted. However, in this embodiment, the presence of the strip-shaped stabilizing ribs 12 forms a gap between the isolation surface 10 of the elastic diaphragm 9 and the inner side of the shell, which facilitates their separation and avoids the generation of such noise.

[0022] In a specific application scenario, initially, the isolation surface 10 of the elastic diaphragm 9 is tightly attached to the inner side of the lower housing 2. When the hot water supply system is running, the volume of the water in the system expands due to heat, and some of the water enters the water receiving cavity 8 through the liquid receiving pipe 16. The isolation surface 10 moves away from the inner side of the lower housing 2 towards the upper housing 1, increasing the space of the water receiving cavity 8 to ensure the stability of the pressure of the hot water supply system. When the water in the hot water supply system cools and contracts, its volume decreases. Under pressure, the water previously received in the water receiving cavity 8 flows back to the hot water supply system through the liquid receiving pipe 16. The isolation surface 10 of the elastic diaphragm moves towards the lower housing 2, and the space of the water receiving cavity 8 decreases accordingly to maintain the stability of the liquid level in the hot water supply system. This process is repeated continuously to realize the function of the expansion tank in the hot water supply system, ensuring that the hot water supply system is always maintained within an appropriate pressure and liquid level range.

[0023] In this embodiment, the above is merely an example and is not intended to limit the scope of protection of this application.

[0024] This utility model provides a reinforced high-pressure expansion tank, in which the upper and lower shells are symmetrically arranged, the elastic diaphragm is disposed between the two shells, the outer edge is clamped between two riveted edges, and is wrapped and fixed by two sets of symmetrically arranged C-shaped riveting rings, forming a receiving cavity between the upper and lower shells. The outer end faces of both shells extend outward with a specific arc, and the inner surfaces are provided with pressure-bearing ribs distributed in a grid at equal intervals. The receiving cavity is divided by the elastic diaphragm into an air receiving cavity and a water receiving cavity with adjustable spatial size. The air receiving cavity is connected to the air inlet, and the water receiving cavity is connected to the liquid receiving pipe. The elastic diaphragm is composed of an isolation surface with several strip-shaped stabilizing ribs and clamping edges disposed around the isolation surface. In this patented solution, multiple sets of riveting pressure rings are combined to simultaneously wrap and press the riveted edges of the two shells and the clamping edges of the elastic diaphragm. This ensures the stability of the riveting position between the upper and lower shells and the elastic diaphragm within the receiving cavity without requiring improvements in raw material thickness or processing machine performance. Simultaneously, the clamping edges of the elastic diaphragm deform under pressure, acting as a sealing and filling structure between the two shells, guaranteeing overall sealing. Furthermore, the outwardly extending arcuate protrusions on the outer end faces of the upper and lower shells and the pressure-bearing ribs on their inner surfaces enhance the expansion tank's pressure-bearing capacity. The strip-shaped stabilizing ribs on the surface of the elastic diaphragm prevent noise generation when adjusting the space between the air and water receiving cavities, while also extending the service life of the elastic diaphragm. This results in a more stable overall operation of the expansion tank, a longer service life, and higher safety performance.

[0025] The embodiments disclosed above are only for detailed description of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, simple improvements and changes made in accordance with the claims of the present utility model are still within the scope of protection of the present utility model.

[0026] The scope of protection of this utility model shall be determined by the defined scope. For those skilled in the art, various improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A reinforced high-pressure expansion tank, characterized in that, The device includes an upper shell, a lower shell, an elastic diaphragm, a riveting ring, an inflation nozzle, and a liquid receiving pipe. Both the upper and lower shells include an outwardly extending protruding outer end face with a specific curvature, a side wall surrounding the outer end face, and a riveting edge located at the outer edge of the side wall. The riveting edges of the upper and lower shells are opposite each other and tightly fixed within the riveting ring. A receiving cavity is formed between the upper and lower shells. The elastic diaphragm is disposed within the receiving cavity and divides the cavity into an adjustable-size air receiving cavity and a water receiving cavity. Specifically, it includes an isolation surface and clamping edges surrounding the isolation surface. The isolation surface has several strip-shaped stabilizing ribs, and the clamping edges clamp between the riveting edges of the upper and lower shells. The air receiving cavity communicates with the inflation nozzle, and the water receiving cavity communicates with the liquid receiving pipe.

2. The reinforced high-pressure expansion tank according to claim 1, characterized in that, The riveting ring includes a left riveting ring and a right riveting ring arranged symmetrically. The cross-sections of the left and right riveting rings are both C-shaped, and their cross-sectional wall thickness is 1 to 1.5 times that of the side wall cross-section.

3. The reinforced high-pressure expansion tank according to claim 2, characterized in that, The overall cross-section of the elastic diaphragm is U-shaped.

4. The reinforced high-pressure expansion tank according to claim 1, characterized in that, The strip-shaped stabilizing ribs are parallel to the longer edges of the upper and lower shells and are equidistantly distributed on the surface of the isolation surface.

5. The reinforced high-pressure expansion tank according to claim 1, characterized in that, Both the upper and lower shells have several pressure-bearing ribs arranged in a grid pattern with equal intervals on their inner surfaces.

6. The reinforced high-pressure expansion tank according to claim 1, characterized in that, The gas-containing cavity is configured as a space near the upper housing, and the water-containing cavity is configured as a space near the lower housing.

7. The reinforced high-pressure expansion tank according to claim 6, characterized in that, The inflation nozzle passes through the upper shell and is connected to the air-receiving cavity, and a cover is also provided on its outer side.

8. A reinforced high-pressure expansion tank according to claim 6, characterized in that, The liquid receiving pipe passes through the lower shell and is connected to the water receiving cavity.

9. A reinforced high-pressure expansion tank according to claim 1, characterized in that, Both the upper and lower shells are integrally formed from reinforcing plates.

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