Valve body, safety valve and electric water heater

Abstract

The utility model relates to valve technical field, specifically disclose a valve body, safety valve and electric water heater, and the valve body is used for safety valve, include: inner leak main part and outer leak main part, inner leak main part includes main part department and cooperation department, and the main part department is equipped with inner leak cavity, first interface, second interface and butt joint, and first interface and second interface communicate inner leak cavity, and cooperation department is located in the lateral wall of main part department, and butt joint is located in the lateral wall of main part department and is located in the side of cooperation department that is away from inner leak cavity, one end circumference of outer leak main part is connected with the lateral wall of butt joint, and outer leak main part is equipped with the outer leak cavity that communicates with inner leak cavity in, wherein, cooperation department has the outer leak mouth that communicates outer leak cavity and inner leak cavity, according to the valve body of the utility model embodiment, cooperation department is located in the lateral wall of main part department, and butt joint is located in the side of cooperation department that is away from inner leak cavity, can reduce the impact of safety valve in the pressure relief process to outer leak main part and inner leak main part connecting position, promotes the structural strength and corrosion resistance of valve body, and then promotes the service life of safety valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a valve body, a safety valve, and an electric water heater. Background Technology

[0002] During the heating process of an electric water heater, as the pressure inside the tank increases, when the pressure reaches the external leakage opening value, the external leakage channel opens to reduce the pressure inside the tank and protect it by releasing water. In related technologies, the valve body is usually made of copper and is integrally formed through processing. During long-term use, local corrosion may occur at the external leakage port, causing water dripping and affecting the user experience. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of this invention is to provide a valve body that improves the structural strength and corrosion resistance of the valve body.

[0004] Another objective of this invention is to provide a safety valve, including the aforementioned valve body.

[0005] Another objective of this invention is to provide an electric water heater that includes the aforementioned safety valve.

[0006] According to an embodiment of the present invention, a valve body for a safety valve includes: an internal leakage body and an external leakage body. The internal leakage body includes a main body portion and a mating portion. The main body portion is provided with an internal leakage cavity, a first interface, a second interface, and a connecting interface. The first interface and the second interface communicate with the internal leakage cavity. The mating portion is disposed on the side wall of the main body portion. The connecting interface is disposed on the side wall of the main body portion and located on the side of the mating portion away from the internal leakage cavity. One end periphery of the external leakage body is connected to the side wall of the connecting interface. The external leakage body has an external leakage cavity communicating with the internal leakage cavity. The mating portion has an external leakage port communicating with the external leakage cavity and the internal leakage cavity.

[0007] According to the embodiment of this utility model, the valve body, by setting the internal leakage body and the external leakage body as a separate structure, facilitates the setting of anti-corrosion structure in the mating part, improves the corrosion resistance of the valve body, and the mating part is located on the side wall of the main body, with the interface located on the side of the mating part away from the internal leakage cavity. This can reduce the high pressure impact on the connection position of the external leakage body and the internal leakage body during the pressure relief process of the safety valve. When the fluid enters the connection position of the internal leakage body and the external leakage body, the pressure relief has already been completed. Therefore, the connection position of the internal leakage body and the external leakage body only bears a certain amount of tensile and torsional force, which improves the structural strength of the valve body and thus improves the service life of the safety valve.

[0008] In addition, the valve body according to the above embodiments of the present invention may also have the following additional technical features: In some embodiments, the external leakage body is connected to the end of the interface sidewall facing away from the internal leakage cavity; and / or, the external leakage body and the internal leakage body are mated along the axial direction of the external leakage port.

[0009] In some embodiments, the end face of one end of the leakage body is connected to the end face of the sidewall of the interface.

[0010] In some embodiments, one end of the leakage body is sleeved and connected to the sidewall of the interface.

[0011] In some embodiments, one end of the leakage body is sleeved and connected to the inner peripheral surface of the interface.

[0012] In some embodiments, the outer surface of one end of the leakage body is provided with a notch, and at least a portion of the sidewall of the mating interface is provided at the notch; and / or, the outer wall surface of the leakage body is flush with the outer wall surface of the mating interface; and / or, one end of the leakage body is connected to the mating part.

[0013] In some embodiments, one end of the leakage body is sleeved and connected to the outer side of the interface.

[0014] In some embodiments, the inner surface of one end of the external leakage body is provided with a notch, and at least a portion of the sidewall of the interface is provided at the notch; and / or, the inner wall surface of the external leakage body is flush with the inner wall surface of the interface; and / or, one end of the external leakage body is connected to the outer surface of the internal leakage body.

[0015] In some embodiments, a boss is provided on the outer side of the main body, and the mating interface is provided on the boss. The boss has a first end and a second end extending along the axial direction of the main body, the first end being connected to the side wall of the first interface, and the interface being disposed at the second end of the boss; and / or, the side wall of the first interface is provided with an annular protrusion protruding from the outer side of the inner leakage body, and the boss is connected to the annular protrusion.

[0016] In some embodiments, the sidewall of the interface protrudes from the outer surface of the main body; and / or, the mating part is integrally formed with the main body; and / or, the inner leakage body is welded to the outer leakage body.

[0017] In some embodiments, the periphery of the external vent is provided with an annular rib protruding toward the external vent cavity; and / or, the internal vent body and / or the external vent body are stainless steel pipes; and / or, the surface of the valve body has a nickel-plated layer.

[0018] The safety valve according to an embodiment of the present invention includes: the aforementioned valve body, an internal leakage valve core, and an external leakage valve core; the internal leakage valve core is disposed in the internal leakage cavity and is used to control the connection and disconnection of the first interface and the second interface; the external leakage valve core is disposed in the external leakage cavity and is used to block and open the external leakage port.

[0019] In some embodiments, the internal leakage valve core includes: A valve seat, which is opposite to the second interface, is provided with a pressure relief hole; A valve core, movable along the axis of the pressure relief orifice to open and close the pressure relief orifice; A first reset element has an elastic force that drives the valve core to close the pressure relief hole; A limiting element is configured to guide the valve core to move along the axis of the pressure relief hole.

[0020] The electric water heater according to an embodiment of the present invention includes the aforementioned safety valve. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the valve body according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded view of the valve body according to an embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional schematic diagram of the valve body according to an embodiment of the present utility model.

[0024] Figure 4 This is an exploded view of the valve body according to another embodiment of the present invention.

[0025] Figure 5 This is a cross-sectional schematic diagram of the valve body according to another embodiment of the present invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the valve body according to another embodiment of the present invention.

[0027] Figure 7 This is an exploded view of the valve body according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the safety valve according to an embodiment of the present invention.

[0029] Figure 9 This is a cross-sectional schematic diagram of the safety valve according to an embodiment of the present invention.

[0030] Figure label: Safety valve 1000, valve body 100, internal leakage body 10, main body part 11, internal leakage cavity 111, first interface 112, annular protrusion 1121, second interface 113, mating interface 114, boss 115, mating part 12, external leakage port 121, annular rib 122, external leakage body 20, external leakage cavity 21, mounting hole 22, guide nozzle 30, drain port 31, internal leakage valve core 200, valve seat 210, pressure relief hole 211, valve core 220, first reset part 230, limiting part 240, external leakage valve core 300. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] As a crucial safety protection device in appliances such as electric water heaters, the safety valve opens its external leakage channel to release pressure in the inner tank during heating, ensuring the safe operation of the water heater. This is because the pressure inside the inner tank increases, and when it reaches the external leakage pressure threshold, the safety valve releases pressure and protects the water heater. In related technologies, the valve body is typically made of copper and integrally molded. However, copper has relatively low hardness, and the internal corrosion protection process is difficult to control in terms of thickness. Furthermore, the valve body is constantly exposed to high temperature and high pressure water, making it difficult for an uneven anti-corrosion coating to form effective protection. Over time, the external leakage port is prone to developing gaps, leading to seal failure and leakage, thus affecting the user experience. Therefore, this invention proposes a valve body for safety valves that improves the corrosion resistance of the safety valve and reduces the risk of leakage.

[0033] Combination Figures 1 to 3 According to an embodiment of the present invention, the valve body 100 is used in a safety valve 1000. The valve body 100 includes an internal leakage body 10 and an external leakage body 20. The internal leakage body 10 includes a main body portion 11, which is provided with an internal leakage cavity 111, a first interface 112, a second interface 113, and a connecting interface 114. The first interface 112 and the second interface 113 communicate with the internal leakage cavity 111, and the connecting interface 114 is located on the side wall of the main body portion 11. One end periphery of the external leakage body 20 is connected to the side wall of the connecting interface 114, and the external leakage body 20 is provided with an external leakage cavity 21 that communicates with the internal leakage cavity 111.

[0034] Combination Figure 8 and Figure 9For example, the safety valve 1000 can be used in an electric water heater. The safety valve 1000 may include an internal leakage valve core 200 and an external leakage valve core 300. The internal leakage valve core 200 is located in the internal leakage cavity 111, and the external leakage valve core 300 is located in the external leakage cavity 21. The first interface 112 can be used to connect to the inner tank of the electric water heater, and the second interface 113 can be used to connect to the cold water inlet pipe. When water enters the inner tank, the internal leakage valve core 200 controls the second interface 113 and the first interface 112 to be connected. Water in the cold water inlet pipe can be introduced into the inner tank of the electric water heater through the safety valve 1000. During the heating process of the electric water heater, the internal pressure and temperature of the inner tank increase. When the pressure of the inner tank exceeds the internal leakage pressure, the first interface 112 and the second interface 113 can also be connected through the internal leakage valve core 200 to realize the depressurization of the inner tank and the discharge of a small amount of water. When the pressure in the inner tank exceeds the external leakage pressure, the external leakage valve core 300 can connect the inner leakage chamber 111 and the external leakage chamber 21, and the water and pressure in the inner tank can be discharged through the external leakage chamber 21 to relieve pressure in the inner tank and protect the safe use of the electric water heater.

[0035] Combining 2 and Figure 3 The internal leakage body 10 also includes a mating part 12, which is located on the side wall of the main body 11. The interface 114 is located on the side of the mating part 12 opposite to the internal leakage cavity 111. The mating part 12 has an external leakage port 121 connecting the external leakage cavity 21 and the internal leakage cavity 111, and a safety valve 1000 and an external leakage valve core 300. For example, the external leakage valve core 300 of the safety valve 1000 can cooperate with the mating part 12 to block and open the external leakage port 121. When the pressure of the inner tank does not exceed the set value, the external leakage valve core 300 can stop the mating part 12 and close the external leakage port 121, and the water in the inner tank of the electric water heater cannot be discharged through the external leakage port 121. When the pressure of the inner tank exceeds the external leakage pressure, the external leakage valve core 300 can open the external leakage port 121, and the internal leakage cavity 111 and the external leakage cavity 21 are connected, and the water and pressure in the inner tank can be discharged from the external leakage cavity 21 through the external leakage port 121. The internal leakage body 10 and the external leakage body 20 are separate structures, which facilitates the installation of anti-corrosion structures in the mating part 12, avoiding the risk of erosion gaps in the external leakage port 121 after long-term use, and improving the corrosion resistance of the safety valve 1000. Furthermore, the mating part 12 is located on the side wall of the main body 11, and the interface 114 is located on the side of the mating part 12 away from the internal leakage cavity 111. In other words, the connection between the external leakage body 20 and the internal leakage body 10 is located outside the external leakage port 121. The fluid is depressurized at the external leakage port 121 and then passes through the connection between the internal leakage body 10 and the external leakage body 20. This avoids impact and corrosion at the connection between the external leakage body 20 and the internal leakage body 10 during depressurization, improving the connection stability between the external leakage body 20 and the internal leakage body 10, and thus improving the corrosion resistance and structural strength of the valve body 100.

[0036] Understandably, in related technologies, the external leakage body 10 and the external leakage body 20 are usually made of copper and integrally formed. The inside of the valve body 100 is then protected against corrosion by electroplating. The external leakage port 121 is located near the internal leakage body 10 of the external leakage body 20. The thickness of the anti-corrosion electroplating process inside the valve body 100, especially at the external leakage port 121, is difficult to control. An uneven anti-corrosion coating is difficult to form an effective anti-corrosion protection, which can easily lead to failure of the sealing surface of the external leakage channel and premature pressure release and water leakage. The valve body 100 of this embodiment of the utility model, by setting the internal leakage body 10 and the external leakage body 20 as a separate structure, can facilitate the setting of an anti-corrosion structure in the mating part 12, thereby improving the corrosion resistance of the valve body 100. Moreover, the mating part 12 is located inside the interface 114, which can reduce the high pressure impact on the connection position of the external leakage body 20 and the internal leakage body 10 during the pressure relief process of the safety valve 1000. When the fluid passes through the connection position of the internal leakage body 10 and the external leakage body 20, the pressure relief has been completed. Therefore, the connection position of the internal leakage body 10 and the external leakage body 20 only bears a certain amount of tensile and torsional force, thereby improving the structural strength of the valve body 100 and thus extending the service life of the safety valve 1000.

[0037] For example, by designing the internal leakage body 10 and the external leakage body 20 as separate structures, it is convenient to install a plastic layer or stainless steel layer on the mating part 12, and then install the internal leakage body 10 and the external leakage body 20 together. The plastic layer or stainless steel layer has good stability and corrosion resistance, which can reduce the impact of long-term fluid erosion on the mating part 12. Alternatively, both the internal leakage body 10 and the external leakage body 20 can be made of stainless steel. Compared with the copper valve body 100, stainless steel has higher corrosion resistance and stability, which can prevent the safety valve 1000 from corroding and wearing after long-term use, thus extending the service life of the safety valve 1000.

[0038] In addition, the internal leakage body 10 and the external leakage body 20 are designed as separate structures, which makes it convenient to adjust and optimize the structure of the internal leakage body 10 and the external leakage body 20 separately. Compared with the one-piece structure of the valve body 100, it can avoid the need to adjust the mold of the entire valve body 100 when the structure and parameters of the external leakage body 20 or the internal leakage body 10 need to be adjusted separately.

[0039] The external leakage body 20 and the internal leakage body 10 can be connected together by welding, or sealed together by threads or adhesive.

[0040] The mating part 12 is integrally formed with the main body 11. For example, the internal leakage main body 10 can be made entirely of stainless steel, and both the mating part 12 and the main body 11 are made of stainless steel, giving the internal leakage main body 10 good corrosion resistance and stability, reducing the problem of erosion gaps in the mating part 12 after long-term use, and giving the internal leakage main body 10 high structural strength. Of course, the mating part 12 and the main body 11 can be separate structures. For example, the main body 11 can be made of metals such as copper or stainless steel to improve the structural strength of the main body 11, and the mating part 12 can be made of plastic. In combination with the above, the internal leakage main body 10 and the external leakage main body 20 are separate structures, which makes it easy to install the mating part 12 on the internal leakage main body 10. The mating part 12 has good corrosion resistance and stability, which can effectively reduce the risk of erosion gaps in the external leakage port 121 after long-term use and improve the service life of the safety valve 1000.

[0041] In addition, the valve body 100 may also include a guide nozzle 30, which is connected to the external leakage body 20. External leakage water can be discharged through the guide nozzle 30. The guide nozzle 30 may also be connected to an external drain pipe to facilitate the drainage of residual water in the inner tank during water heater maintenance. The guide nozzle 30 and the external leakage body 20 may be an integrally formed structure, or they may be separate structures. In embodiments where the guide nozzle 30 and the external leakage body 20 are separate, they may be connected together by welding or threaded connections.

[0042] In some embodiments of this utility model, the mating part 12 is integrally formed with the main body part 11, which improves the structural strength of the mating part 12 and facilitates the stable mating of the external leakage valve core 300 with the mating part 12 to block and open the external leakage port 121.

[0043] In some embodiments of this utility model, the internal leakage body 10 is a stainless steel pipe, which gives the internal leakage body 10 high strength and corrosion resistance, improves the reliability of the valve body 100, and thus extends the service life of the safety valve 1000.

[0044] In some embodiments of this utility model, the external leakage body 20 is a stainless steel pipe. The stainless steel external leakage body 20 provides high strength and corrosion resistance, improving the reliability of the valve body 100 and thus extending the service life of the safety valve 1000.

[0045] In one embodiment of this utility model, both the internal leakage body 10 and the external leakage body 20 are made of stainless steel pipes. It is understood that electric water heaters are typically installed in humid environments such as bathrooms, and the inner and outer sides of the valve body 100 are constantly exposed to a humid environment. In particular, the inner side of the valve body 100 is constantly exposed to a high-temperature, high-humidity, and high-pressure environment, making the valve body 100 prone to wear and corrosion. By making both the internal leakage body 10 and the external leakage body 20 of stainless steel pipes, compared to the copper valve body 100 in related technologies, on the one hand, the corrosion resistance of the valve body 100 can be improved, reducing the leakage problem of the safety valve 1000; on the other hand, the structural strength of the valve body 100 can be improved, reducing the deformation problem of the safety valve 1000 during transportation, installation, and use, thereby improving the reliability and service life of the safety valve 1000.

[0046] For example, the internal leakage body 10 can be made entirely of stainless steel. That is, both the main body 11 and the mating part 12 are made of stainless steel. The internal leakage body 10 can be integrally formed by cold heading process, and the mating part 12 can be formed by precision machining to improve the structural strength of the mating part 12.

[0047] During the heating process of an electric water heater, as the pressure inside the tank increases, when it reaches the external leakage pressure opening value, the external leakage channel opens to reduce the pressure inside the tank and protect it by releasing water. In related technologies, the valve body 100 of the safety valve 1000 is made of metal such as copper. The inner side of the external leakage channel R port is in a high-temperature and high-pressure water environment when the pressure inside the tank reaches the external leakage value. The uneven anti-corrosion coating is difficult to form an effective anti-corrosion protection. Under the scouring action of the high-temperature and high-pressure water side, there are scouring gaps on the inner side of the R port. The outer side of the external leakage channel R port is in a harsh environment of dry and wet circulation, which accelerates corrosion and causes corrosion gaps. When the corrosion gaps on the inner and outer sides of the external leakage channel R port are connected, the sealing surface of the external leakage channel fails, resulting in premature pressure release and water leakage.

[0048] This invention, by making the internal leakage body 10 of stainless steel and integrally molding the mating part 12 with the main body 11, gives the mating part 12 high strength and corrosion resistance, effectively reducing the risk of erosion damage to the external leakage port 121 after long-term use and extending the service life of the safety valve 1000. For example, the internal leakage body 10 can be made of SUS304 material to improve its corrosion resistance.

[0049] Combination Figure 3 In some embodiments of this utility model, the external leakage body 20 is connected to the end of the sidewall of the interface 114 that faces away from the inner leakage cavity 111, which facilitates the docking of the external leakage body 20 with the sidewall of the interface 114 and reduces the processing difficulty. In some embodiments of this utility model, the external leakage body 20 and the inner leakage body 10 are docked along the axial direction of the external leakage port 121, combined with the attached... Figure 3As shown, the axis of the external vent 121 extends along the AA direction. During the depressurization process, the fluid flows along the axis of the external vent 121, which can reduce the impact of the fluid on the connection between the external vent body 20 and the internal vent body 10 during the depressurization process and improve the connection strength between the internal vent body 10 and the external vent body 20.

[0050] Combination Figure 3 In some embodiments of this utility model, one end face of the external leakage body 20 is connected to the end face of the side wall of the interface 114. That is, the external leakage body 20 and the internal leakage body 10 are connected end-to-end, facilitating the forming of the internal leakage body 10 and the external leakage body 20, and improving the connection strength between them. The internal leakage body 10 and the external leakage body 20 can be welded together, improving the connection stability and production efficiency. For example, a copper core fixture can be embedded in the welding position of the internal leakage body 10 and the external leakage body 20 to ensure the concentricity of the side wall of the interface 114 and the external leakage body 20.

[0051] Combination Figures 4 to 6 In some embodiments of this utility model, one end of the leakage body 20 is sleeved and connected to the side wall of the interface 114, which can improve the concentricity of the assembly of the interface 114 and the leakage body 20 and reduce the assembly difficulty of the interface 114 and the leakage body 20. Specifically, one end of the leakage body 20 can be sleeved and connected to the inner circumferential surface of the interface 114; or, one end of the leakage body 20 can be sleeved and connected to the outer surface of the interface 114.

[0052] Combination Figure 4 and Figure 5 In some embodiments of this utility model, a notch is provided on the outer side of one end of the external leakage body 20, and at least a portion of the side wall of the interface 114 is provided in the notch. The notch can be positioned with the side wall of the interface 114, eliminating the need for additional tooling to align the interface 114 and the external leakage body 20, thus reducing the assembly difficulty of the interface 114 and the external leakage body 20. Furthermore, the side wall of one end of the external leakage body 20 and the side wall of the interface 114 are stacked and connected along the radial direction of the external leakage port 121, which can further reduce the impact of fluid on the connection between the external leakage body 20 and the internal leakage body 10, and improve the connection strength and stability between the external leakage body 20 and the internal leakage body 10.

[0053] For example, the leakage body 20 can be made of stainless steel pipe. The outer side of one end of the leakage body 20 can be notched by precision machining to make the outer periphery so that the leakage body 20 and the side wall of the interface 114 have a guiding structure to ensure that one end of the leakage body 20 and the side wall of the interface 114 are concentrically assembled.

[0054] Combination Figure 5Furthermore, the outer wall surface of the external leakage body 20 is flush with the outer wall surface of the interface 114. For example, the sidewalls of the external leakage body 20 and the interface 114 can be connected by welding. By making the outer wall surface of the external leakage body 20 flush with the outer wall surface of the interface 114, welding between the external leakage body 20 and the interface 114 is facilitated. After processing, the valve body 100 can also be nickel-plated to further improve its corrosion resistance. The flush structure between the outer wall surface of the external leakage body 20 and the outer wall surface of the interface 114 facilitates the formation of a uniform nickel plating layer at the connection point between the external leakage body 20 and the internal leakage body 10.

[0055] Optionally, one end of the external leakage body 20 is connected to the mating part 12 to further enhance the connection strength and stability between the external leakage body 20 and the internal leakage body 10.

[0056] Combination Figure 6 In some embodiments of this utility model, a notch is provided on the inner side of one end of the external leakage body 20, and at least a portion of the sidewall of the interface 114 is provided in the notch. The notch of the external leakage body 20 can be positioned with the sidewall of the interface 114, eliminating the need for additional tooling to align the interface 114 and the external leakage body 20, thus reducing the assembly difficulty of the interface 114 and the external leakage body 20. Furthermore, the sidewall of one end of the external leakage body 20 and the sidewall of the interface 114 are stacked and connected along the radial direction of the external leakage port 121, which can further reduce the impact of fluid on the connection between the external leakage body 20 and the internal leakage body 10, and improve the connection strength and stability between the external leakage body 20 and the internal leakage body 10.

[0057] For example, both the external leakage body 20 and the internal leakage body 10 can be made of stainless steel tubes. The inner side of one end of the external leakage body 20 can be precision machined to form a notch to ensure concentric assembly of the external leakage body 20 and the interface 114. The height of the side wall of the interface 114 along the axis of the external leakage port 121 can be set to 4mm to avoid the height being too high, which would affect the forming of the internal leakage body 10, and the height being too low, which would prevent the formation of a guiding structure with the external leakage body 20.

[0058] Furthermore, the inner wall surface of the external leakage body 20 is flush with the inner wall surface of the connecting port 114. Specifically, when the pressure in the inner tank exceeds the external leakage pressure, the external leakage valve core 300 can open the external leakage port 121 and connect the inner leakage chamber 111 and the external leakage chamber 21. The water and pressure in the inner tank enter the external leakage chamber 21 through the external leakage port 121 for pressure relief. The flushness of the inner wall surface of the external leakage body 20 with the inner wall surface of the connecting port 114 reduces the resistance of the fluid when passing through the connection between the external leakage body 20 and the connecting port 114.

[0059] For example, the sidewall of the leakage body 20 and the interface 114 can be connected together by welding, and the inner wall of the leakage body 20 is flush with the inner wall surface of the interface 114, which can reduce the eddy currents and impacts of the fluid when it passes through the welding position.

[0060] In some embodiments of this utility model, one end of the external leakage body 20 is connected to the outer side of the internal leakage body 10, and the end face of one end of the external leakage body 20 can be positioned on the outer side of the internal leakage body 10, further improving the connection stability between the external leakage body 20 and the internal leakage body 10.

[0061] Combination Figure 2 In some embodiments of this utility model, the sidewall of the interface 114 protrudes from the outer surface of the main body 11, facilitating the docking of the leakage body 20 and the interface 114 and reducing processing difficulty. For example, the leakage body 20 and the sidewall of the interface 114 can be connected together by welding. The sidewall of the interface 114 protrudes from the outer surface of the main body 11, making it convenient to weld the leakage body 20 and the sidewall of the interface 114 together.

[0062] Combination Figure 2 In some embodiments of this utility model, a boss 115 is provided on the outer side of the main body 11, and the interface 114 is provided on the boss 115. The boss 115 can enhance the structural strength of the main body 11 and facilitate the processing and forming of the interface 114.

[0063] For example, the internal leakage body 10 can be made entirely of stainless steel, and the internal leakage body 10 can be integrally formed by cold heading process. By providing a boss 115 on the outer side of the body part 11, the interface 114 can be formed by precision machining of the boss 115, which facilitates the processing and forming of the internal leakage body 10 and avoids affecting the body part 11 during the precision machining of the internal leakage body 10.

[0064] Furthermore, the boss 115 has a first end and a second end extending along the axial direction of the main body 11. The first end is connected to the side wall of the first interface 112, and the interface 114 is provided at the second end of the boss 115. The provision of the interface 114 at the second end of the boss 115 facilitates the docking of the side wall of the interface 114 with the leakage body 20, and reduces the impact on the main body 11 when the interface 114 is connected to the leakage body 20. In addition, the boss 115 extends to the side wall of the first interface 112, which can improve the structural strength of the first interface 112.

[0065] For example, the first interface 112 can be connected to the inner tank of the electric water heater through the anti-electric wall, and the boss 115 extends along the axial direction of the main body 11 to the side wall of the first interface 112, which can improve the structural strength of the side wall of the first interface 112.

[0066] Combination Figure 2 In some embodiments, the sidewall of the first interface 112 is provided with an annular protrusion 1121 protruding from the outer side of the internal leakage body 10, and the boss 115 is connected to the annular protrusion 1121. When the safety valve 1000 is connected to the anti-electric wall, a tool can be used to clamp the annular protrusion 1121. The connection between the boss 115 and the annular protrusion 1121 increases the structural strength of the annular protrusion 1121 and prevents damage to the safety valve 1000 during installation.

[0067] The first interface 112 has an internal thread on its inner side to facilitate connection between the first interface 112 and the anti-electric shock wall. In addition, the second interface 113 may have an external thread on its outer side.

[0068] In some embodiments of this utility model, the internal leakage body 10 and the external leakage body 20 are welded together. This improves the connection stability and production efficiency of the internal leakage body 10 and the external leakage body 20. Furthermore, in conjunction with the foregoing, one end of the external leakage body 20 is connected to the side wall of the interface 114, and the mating part 12 is located inside the interface 114. This ensures that the welding position of the external leakage body 20 is not under pressure, avoiding errors in the welding process and preventing gap corrosion caused by the welding position being under high pressure for a long time. This further improves the corrosion resistance of the valve body 100 and extends its service life.

[0069] For example, the internal leakage body 10 and the external leakage body 20 can be laser welded, which can improve the welding efficiency of the internal leakage body 10 and the external leakage body 20 and reduce the production cost of the valve body 100; or, the internal leakage body 10 and the external leakage body 20 can be furnace welded together, which can reduce the risk of gaps at the connection position of the internal leakage body 10 and the external leakage body 20 and improve the reliability of the safety valve 1000. The internal leakage body 10 and the external leakage body 20 are welded together in a furnace. During the furnace welding, the internal leakage body 10 and the external leakage body 20 can be preliminarily connected together, that is, the internal leakage body 10 and the external leakage body 20 are pre-positioned. For example, the internal leakage body 10 and the external leakage body 20 can be spot welded with filler wire first. After the internal leakage body 10 and the external leakage body 20 are preliminarily connected together, welding paste is applied to the outer surface of the connection between the internal leakage body 10 and the external leakage body 20, and the valve body 100 is placed in the furnace for furnace welding. When the valve body is placed in the furnace for welding, the welding paste can fill the gap at the connection between the internal leakage body 10 and the external leakage body 20 under the action of siphon, thereby improving the sealing performance at the connection between the internal leakage body 10 and the external leakage body 20 and reducing the risk of crevice corrosion.

[0070] Combination Figure 2 and Figure 3In some embodiments of this utility model, the periphery of the external drain port 121 is provided with an annular rib 122 protruding towards the external drain cavity 21. Exemplarily, the safety valve 1000 may include an external drain valve core 300, which is disposed in the external drain cavity 21. The external drain valve core 300 can be used to open and close the external drain port 121 to control the connection and disconnection of the internal drain cavity 111 and the external drain cavity 21. When the external drain valve core 300 closes the external drain port 121, water in the inner tank of the electric water heater will not be discharged through the external drain port 121. When the external drain valve core 300 opens the external drain port 121, water in the inner tank can be discharged through the external drain port 121, thereby using the external drain port 121 to relieve pressure on the inner tank. By providing an annular rib 122 protruding towards the external drain cavity 21 on the periphery of the external drain port 121, the sealing performance of the safety valve 1000 can be improved when the external drain valve core 300 closes the external drain port 121.

[0071] The part of the external leakage valve core 300 that mates with the external leakage port 121 can be made of flexible materials such as rubber. When the external leakage valve core 300 blocks the external leakage port 121, the rubber part is compressed and can fill the gap between the mating part 12 and the external leakage valve core 300, blocking the leakage of fluid from the external leakage port 121. In conjunction with the above, the mating part 12 has good corrosion resistance and stability. Therefore, the mating of the external leakage valve core 300 with the annular rib 122 of the mating part 12 can improve the reliability of the safety valve 1000, avoid the failure of the sealing surface of the external leakage channel due to erosion gaps in the mating part 12 after long-term use, and extend the service life of the safety valve 1000.

[0072] In some embodiments of this utility model, the surface of the valve body 100 has a nickel plating layer. Exemplarily, the internal leakage body 10, the external leakage body 20, and the guide nozzle 30 are all separate structures that can be connected together by welding. After welding, the surface of the valve body 100 can be nickel plating to improve the corrosion resistance of the valve body 100 and improve the service life and reliability of the safety valve 1000.

[0073] Combination Figure 3 and Figure 7 In some embodiments of this utility model, the side wall of the external leakage body 20 is provided with a mounting hole 22, which connects to the external leakage cavity 21. The valve body 100 also includes a guide nozzle 30, one end of which is connected to the periphery of the mounting hole 22. The guide nozzle 30 has a drain outlet 31 that communicates with the external leakage cavity 21. When the external leakage valve core 300 opens the external leakage port 121, water in the inner tank enters the guide nozzle 30 through the external leakage port 121 and is discharged through the drain outlet 31 of the guide nozzle 30 to relieve pressure on the inner tank. In addition, the guide nozzle 30 can also be used to drain the external drainage pipe, so that residual water in the inner tank can be drained through the drainage pipe when maintaining the electric water heater. The external leakage body 20 and the guide nozzle 30 are designed as separate structures, which reduces the difficulty of processing and molding the external leakage body 20 and the guide nozzle 30.

[0074] Specifically, the valve body 100 of this embodiment may be composed of three separate parts. In conjunction with the foregoing, in related technologies, the valve body 100 is typically made of copper and integrally formed, with the inner side of the valve body 100 then subjected to anti-corrosion plating. However, controlling the thickness of the anti-corrosion electroplating process inside the valve body 100, especially at the external leakage port 121, is difficult. The valve body 100 of this embodiment, by setting the internal leakage body 10, the external leakage body 20, and the guide nozzle 30 into a separate structure, facilitates the installation of parts at the mating portion 12. The corrosion-resistant structure enhances the corrosion resistance of the valve body 100 and extends the service life of the safety valve 1000. Furthermore, the mating part 12 is located inside the interface 114. After the fluid is depressurized at the external vent 121, it passes through the connection between the internal vent body 10 and the external vent body 20. This prevents the safety valve 1000 from impacting and corroding the connection between the external vent body 20 and the internal vent body 10 during the depressurization process, thereby improving the connection stability between the external vent body 20 and the internal vent body 10 and enhancing the corrosion resistance and structural strength of the valve body 100.

[0075] In addition, the internal leakage body 10, the external leakage body 20 and the guide nozzle 30 are all designed as separate structures, which makes it convenient to adjust and optimize the structure of the internal leakage body 10, the external leakage body 20 and the guide nozzle 30 individually. Compared with the one-piece structure of the valve body 100, it can avoid the need to adjust the mold of the entire valve body 100 when the structure and parameters of the external leakage body 20, the internal leakage body 10 and the guide nozzle 30 need to be adjusted individually.

[0076] The leakage body 20 and the guide nozzle 30 can be connected together by welding, or sealed together by threads and adhesive.

[0077] In some embodiments of this utility model, the leakage body 20 and the guide nozzle 30 are welded together to avoid the problem of loose connection between the leakage body 20 and the guide nozzle 30, thereby improving the connection stability and production efficiency of the leakage body 20 and the guide nozzle 30.

[0078] The guide nozzle 30 is made of stainless steel. This gives the guide nozzle 30 high strength and corrosion resistance, allowing the safety valve 1000 to maintain good stability even when exposed to humid environments for extended periods, thereby extending the service life of the safety valve 1000.

[0079] Combination Figure 8 The present invention also proposes a safety valve 1000, including the aforementioned valve body 100. Since the valve body 100 according to the embodiments of the present invention has the aforementioned beneficial technical effects, the service life of the safety valve 1000 can be improved by providing the aforementioned valve body 100.

[0080] Combination Figure 9For example, the safety valve 1000 may include an internal leakage valve core 200, which is disposed in the internal leakage cavity 111. The internal leakage valve core 200 can be used to control the connection and disconnection of the first interface 112 and the second interface 113.

[0081] The safety valve 1000 may also include an external leakage valve core 300, which is disposed in the external leakage chamber 21. The external leakage valve core 300 is used to block and open the external leakage port 121.

[0082] Combination Figure 9 Furthermore, the internal relief valve core 200 includes a valve seat 210 and a valve core 220. The valve seat 210 is provided with a pressure relief hole 211. The valve core 220 is movable along the axis of the pressure relief hole 211 to open and close the pressure relief hole 211. When it is necessary to release the pressure inside the inner liner, the valve core 220 opens the pressure relief hole 211 to ensure the safe use of the inner liner.

[0083] The internal relief valve core 200 also includes a first reset member 230, which has an elastic force that drives the valve core 220 to close the pressure relief port 211. Specifically, when the pressure in the inner tank does not exceed the safety value, that is, when the pressure value of the inner tank is normal, the first reset member 230 can drive the valve core 220 to close the pressure relief port 211, and the safety valve 1000 can be in a closed and sealed state to prevent the medium in the inner tank from flowing out. When the pressure in the inner tank exceeds the safety value, the pressure in the inner tank overcomes the elastic force of the first reset member 230, driving the valve core 220 to open the pressure relief port 211. For example, the first reset member 230 can be a spring.

[0084] The internal relief valve core 200 also includes a limiting member 240, which is configured to guide the valve core 220 to move along the axis of the pressure relief hole 211. The limiting member 240 can prevent the valve core 220 from swinging in the radial direction of the pressure relief hole 211 during movement, reduce the vibration of the valve core 220 during movement, thereby reducing the noise of the safety valve 1000 during the pressure relief process and improving the working stability of the safety valve 1000.

[0085] For example, the safety valve 1000 may have an internal leakage channel. When the valve core 220 closes and opens the pressure relief hole 211, the fluid in the inner tank flows at high speed in the internal leakage channel, which can easily generate discrete pressure waves, causing the valve core 220 to vibrate and generate noise. By setting a limiting member 240 to guide the valve core 220 to move along the axial direction of the pressure relief hole 211, the noise caused by the vibration of the valve core 220 during the opening and closing of the pressure relief hole 211 can be reduced. Optionally, the internal leakage valve core 200 may also include a second reset member, which has an elastic force to drive the internal leakage valve core 200 to close the second interface 113. Specifically, when the pressure in the inner tank does not exceed the safety value, that is, when the pressure value in the inner tank is normal, the second reset member can drive the internal leakage valve core 200 to close the second interface 113, and the safety valve 1000 can be in a closed and sealed state to prevent the medium in the inner tank from flowing out. When the pressure inside the liner exceeds the safe value, the pressure inside the liner overcomes the elastic force of the second reset element, driving the internal leakage valve core 200 to open the internal leakage port, thereby releasing the pressure inside the liner. For example, the second reset element can be a spring.

[0086] This utility model also proposes an electric water heater, including the aforementioned safety valve 1000. By setting the aforementioned valve body 100, the problem of water leakage during use of the safety valve 1000 can be reduced.

[0087] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0090] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve body (100) for a safety valve, characterized in that, include: An internal leakage body (10) includes a main body (11) and a mating part (12). The main body (11) is provided with an internal leakage cavity (111), a first interface (112), a second interface (113), and a connecting interface (114). The first interface (112) and the second interface (113) communicate with the internal leakage cavity (111). The mating part (12) is located on the side wall of the main body (11). The connecting interface (114) is located on the side wall of the main body (11) and is located on the side of the mating part (12) away from the internal leakage cavity (111). The external leakage body (20) has one end periphery connected to the side wall of the interface (114), and the external leakage body (20) has an external leakage cavity (21) communicating with the internal leakage cavity (111); The mating part (12) has an external outlet (121) that connects the external discharge cavity (21) and the internal discharge cavity (111).

2. The valve body (100) according to claim 1, characterized in that, The external leakage body (20) is connected to the end of the side wall of the interface (114) away from the internal leakage cavity (111); and / or, the external leakage body (20) and the internal leakage body (10) are connected along the axial direction of the external leakage port (121).

3. The valve body (100) according to claim 1, characterized in that, The end face of one end of the leakage body (20) is connected to the end face of the side wall of the interface (114).

4. The valve body (100) according to claim 1, characterized in that, One end of the leakage body (20) is sleeved and connected to the side wall of the interface (114).

5. The valve body (100) according to claim 4, characterized in that, One end of the external leakage body (20) is sleeved and connected to the inner circumferential surface of the interface (114).

6. The valve body (100) according to claim 5, characterized in that, The outer surface of one end of the leakage body (20) is provided with a notch, and at least a portion of the sidewall of the mating interface (114) is provided at the notch; and / or, the outer wall surface of the leakage body (20) is flush with the outer wall surface of the mating interface (114); and / or, one end of the leakage body (20) is connected to the mating part (12).

7. The valve body (100) according to claim 4, characterized in that, One end of the leakage body (20) is sleeved and connected to the outer side of the interface (114).

8. The valve body (100) according to claim 7, characterized in that, The inner side of one end of the external leakage body (20) is provided with a notch, and at least a portion of the sidewall of the interface (114) is provided at the notch; and / or, the inner wall surface of the external leakage body (20) is flush with the inner wall surface of the interface (114); and / or, one end of the external leakage body (20) is connected to the outer side of the internal leakage body (10).

9. The valve body (100) according to claim 1, characterized in that, The outer side of the main body (11) is provided with a boss (115), and the interface (114) is provided on the boss (115). The boss (115) has a first end and a second end extending along the axial direction of the main body (11), the first end being connected to the side wall of the first interface (112), and the docking interface (114) being disposed at the second end of the boss (115); and / or, the side wall of the first interface (112) is provided with an annular protrusion (1121) protruding from the outer side of the inner leakage body (10), and the boss (115) is connected to the annular protrusion (1121).

10. The valve body (100) according to any one of claims 1-9, characterized in that, The sidewall of the interface (114) protrudes from the outer side of the main body (11); and / or, the mating part (12) is integrally formed with the main body (11); and / or, the inner leakage body (10) is welded to the outer leakage body (20).

11. The valve body (100) according to claim 1, characterized in that, The periphery of the external vent (121) is provided with an annular rib (122) protruding towards the external vent cavity (21); and / or, the internal vent body (10) and / or the external vent body (20) are stainless steel pipes; and / or, the surface of the valve body (100) has a nickel plating layer.

12. A safety valve (1000), characterized in that, include: Valve body (100) according to any one of claims 1-11; An internal leakage valve core (200) is disposed in the internal leakage cavity (111) and is used to control the connection and disconnection of the first interface (112) and the second interface (113); An external leakage valve core (300) is disposed in the external leakage cavity (21) and is used to block and open the external leakage port (121).

13. The safety valve (1000) according to claim 12, characterized in that, The internal leakage valve core (200) includes: Valve seat (210), which is opposite to the second interface (113), and the valve seat (210) is provided with a pressure relief hole (211); A valve core (220) is movable along the axis of the pressure relief hole (211) to open and close the pressure relief hole (211); A first reset member (230) has an elastic force that drives the valve core (220) to close the pressure relief hole (211); A limiting element (240) is configured to guide the valve core (220) to move along the axis of the pressure relief hole (211).

14. An electric water heater, characterized in that, Includes the safety valve as described in claim 12 or 13.

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