Valve body, safety valve and electric water heater

Abstract

This utility model relates to the field of valve technology, specifically disclosing a valve body, a safety valve, and an electric water heater. The valve body, used as a safety valve, includes: a valve body and an external drain pipe. The valve body has a first interface, a second interface, and a main body portion. The main body portion is connected between the first interface and the second interface. An internal drain cavity communicating with the first interface and the second interface is provided within the main body portion, and a first mounting hole communicating with the internal drain cavity is provided on the side wall of the main body portion. One end of the external drain pipe is connected to the periphery of the first mounting hole, and an external drain cavity communicating with the internal drain cavity is provided within the external drain pipe. According to the embodiment of this utility model, the valve body and the external drain pipe are designed as separate structures, which facilitates the installation of anti-corrosion structures on the valve body and the external drain pipe, improving the corrosion resistance of the valve body and thus extending the service life of the 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 utility model aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of this utility model is to provide a valve body that facilitates the installation of anti-corrosion structures in the valve body and the external leakage pipe, thereby improving the 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, including the aforementioned safety valve.

[0006] According to an embodiment of the present invention, a valve body is used for a safety valve, comprising: a valve body and an external leakage pipe. The valve body has a first interface, a second interface, and a main body portion. The main body portion is connected between the first interface and the second interface. The main body portion has an internal leakage cavity communicating with the first interface and the second interface, and the side wall of the main body portion has a first mounting hole communicating with the internal leakage cavity. One end of the external leakage pipe is connected to the periphery of the first mounting hole, and the external leakage pipe has an external leakage cavity communicating with the internal leakage cavity.

[0007] According to the embodiment of this utility model, the valve body and the external leakage pipe are designed as separate structures, which facilitates the installation of anti-corrosion structures on the valve body and the external leakage pipe, improves the anti-corrosion performance of the valve body, and thus extends 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:

[0009] In some embodiments, one end of the vent pipe is disposed in the first mounting hole, and the outer surface of the one end of the vent pipe is sealed to the inner surface of the first mounting hole.

[0010] In some embodiments, the end face of one end of the external discharge pipe is flush with the inner wall surface of the valve body.

[0011] In some embodiments, the inner side of the first interface is provided with a first internal thread, which extends to the inner wall surface of the valve body and the end face of one end of the external discharge pipe.

[0012] In some embodiments, the valve body is welded to the external leakage pipe.

[0013] In some embodiments, the valve body and the external leakage pipe are connected as one unit by laser welding or furnace welding.

[0014] In some embodiments, the external drain pipe includes a pipe body and a mating part. One end of the pipe body is connected to the valve body, and the mating part is located at the same end of the pipe body. The mating part has an external drain port opposite to the channel inside the pipe body, and the periphery of the external drain port is provided with an annular rib facing the channel inside the pipe body.

[0015] In some embodiments, the valve body is configured as a tube, and the first interface, the second interface, and the body portion are arranged along the axis of the valve body.

[0016] In some embodiments, the external drain pipe is configured as a tube with its axis perpendicular to the axis of the valve body.

[0017] In some embodiments, the valve body and / or the external leakage pipe are stainless steel pipes.

[0018] In some embodiments, the side wall of the external discharge pipe is provided with a second mounting hole, the second mounting hole communicating with the external discharge cavity, and the valve body further includes a connecting pipe, one end of which is connected to the periphery of the second mounting hole, and the connecting pipe is provided with a drain outlet communicating with the external discharge cavity.

[0019] In some embodiments, one end of the connecting pipe is disposed in the second mounting hole, and the outer surface of the one end of the connecting pipe is sealed to the inner surface of the second mounting hole.

[0020] In some embodiments, the end face of one end of the connecting pipe is flush with the inner wall surface of the external discharge pipe.

[0021] In some embodiments, the inner surface of the venting pipe is provided with a second internal thread, which extends to the end face of one end of the connecting pipe.

[0022] In some embodiments, the connecting pipe is a stainless steel pipe.

[0023] In some embodiments, the external discharge pipe is welded to the connecting pipe.

[0024] In some embodiments, the external discharge pipe and the connecting pipe are connected as one unit by laser welding or furnace welding.

[0025] In some embodiments, the surface of the valve body has a nickel plating layer.

[0026] The safety valve according to an embodiment of the present invention includes: the aforementioned valve body;

[0027] An internal leakage valve core is disposed in the internal leakage cavity;

[0028] An external leakage valve core is disposed in the external leakage cavity.

[0029] The electric water heater according to an embodiment of the present invention includes the aforementioned safety valve. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the valve body according to an embodiment of the present invention.

[0031] Figure 2 This is an exploded view of the valve body according to an embodiment of the present invention.

[0032] Figure 3 This is a cross-sectional schematic diagram of the valve body according to an embodiment of the present utility model.

[0033] Figure 4 This is a cross-sectional schematic diagram of the valve body according to an embodiment of the present utility model.

[0034] Figure 5 This is a schematic diagram of the safety valve according to an embodiment of the present invention.

[0035] Figure 6 This is a cross-sectional schematic diagram of the safety valve according to an embodiment of the present invention.

[0036] Figure label:

[0037] Safety valve 1000, valve body 100, valve body 10, first interface 11, second interface 12, main body 13, internal leakage cavity 131, first mounting hole 132, first internal thread 14, external leakage pipe 20, external leakage cavity 21, pipe body 22, mating part 23, external leakage port 231, annular rib 232, second mounting hole 24, second internal thread 25, connecting pipe 30, drain port 31, internal leakage valve core 210, external leakage valve core 220, clamping sleeve 221, control handle 230, end cap 300, filter element 400. Detailed Implementation

[0038] 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.

[0039] As an important safety protection device in electric water heaters and other equipment, the safety valve opens its external leakage channel to release pressure in the inner tank during the heating process. When the pressure in the inner tank reaches the external leakage pressure opening value, the safety valve protects the electric water heater. In related technologies, the valve body of the safety valve is made of copper and is integrally molded. Copper valve bodies have low hardness, and the thickness of the anti-corrosion process inside the valve body is difficult to control. The inside of the valve body is exposed to high temperature and high pressure water environment for a long time. Uneven anti-corrosion coating is difficult to form effective anti-corrosion protection. Under long-term erosion, gaps are easily formed at the external leakage port, leading to seal failure and water leakage from the safety valve, which affects the user experience.

[0040] Combination Figures 1 to 4 According to an embodiment of the present utility model, the valve body 100 is used for the safety valve 1000 and includes: a valve body 10, the valve body 10 having a first interface 11, a second interface 12 and a main body portion 13, the main body portion 13 being connected between the first interface 11 and the second interface 12, the main body portion 13 having an internal leakage cavity 131 communicating with the first interface 11 and the second interface 12, and the side wall of the main body portion 13 having a first mounting hole 132 communicating with the internal leakage cavity 131. For example, the safety valve 1000 can be used in an electric water heater. The first interface 11 can be used to connect to the inner tank of the electric water heater, and the second interface 12 can be used to connect to the cold water inlet pipe. An internal leakage valve core 210 can be provided in the internal leakage cavity 131. When water enters the inner tank, the internal leakage valve core 210 can control the second interface 12 and the first interface 11 to connect. Water in the cold water inlet pipe can enter 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 11 and the second interface 12 can be connected through the internal leakage valve core 210 to realize the pressure relief of the inner tank.

[0041] Combination Figure 2 and Figure 3 The valve body 100 also includes an external drain pipe 20. One end of the external drain pipe 20 is connected to the periphery of the first mounting hole 132. The external drain pipe 20 has an external drain cavity 21 that communicates with the internal drain cavity 131. Specifically, the valve body 10 and the external drain pipe 20 are separate structures. One end of the external drain pipe 20 is connected to the main body 13, so that the internal drain cavity 131 communicates with the external drain cavity 21. By setting the valve body 10 and the external drain pipe 20 as separate structures, it is convenient to set anti-corrosion structures in the valve body 10 and the external drain pipe 20, thereby improving the anti-corrosion performance of the valve body 100.

[0042] Combination Figure 6For example, the safety valve 1000 may include an external leakage valve core 220, which is disposed in the external leakage pipe 20 and can open and close the external leakage port 231. When the pressure in the inner tank does not exceed the set value, the external leakage valve core 220 can close the external leakage port 231, and the water in the inner tank of the electric water heater cannot be discharged through the external leakage port 231. When the pressure in the inner tank exceeds the set value, the external leakage valve core 220 can open the external leakage port 231, and the water in the inner tank can be discharged through the external leakage port 231 to relieve the pressure in the inner tank. Understandably, in related technologies, the valve body 10 and the external leakage pipe 20 are usually made of copper and integrally formed. The inside of the valve body 100 is then electroplated for corrosion protection. The external leakage port 231 is located near the valve body 10 on the external leakage pipe 20. It is difficult to control the thickness of the anti-corrosion electroplating process inside the valve body 100, especially at the external leakage port 231. In this embodiment of the present invention, the valve body 100 is designed as a separate structure for the main body 13 and the external leakage pipe 20, which facilitates the installation of anti-corrosion structures on the inside of the main body 13 and the external leakage pipe 20, improves the corrosion resistance of the valve body 100, and extends the service life of the safety valve 1000.

[0043] For example, by designing the valve body 10 and the external drain pipe 20 as separate units, it is convenient to install a plastic layer or a stainless steel layer on the inner side of the valve body 10 and the external drain pipe 20, and then install the valve body 10 and the external drain pipe 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. Alternatively, both the valve body 10 and the external drain pipe 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.

[0044] In addition, the valve body 10 and the external leakage pipe 20 are designed as separate structures, which makes it easy to adjust and optimize the structure of the valve body 10 and the external leakage pipe 20 separately. Compared with the structure of the valve body 100 being integrally formed, it avoids the need to adjust the mold of the entire valve body 100 when the structure and parameters of the external leakage pipe 20 or the valve body 10 need to be adjusted separately.

[0045] According to the embodiment of the present utility model, the valve body 100 and the external leakage pipe 20 are designed as separate structures, which facilitates the installation of anti-corrosion structures in the valve body 10 and the external leakage pipe 20, improves the anti-corrosion performance of the valve body 100, and thus improves the service life of the safety valve 1000.

[0046] The external leakage pipe 20 and the valve body 10 can be connected together by welding, or by sealing them together by thread or adhesive.

[0047] In addition, the valve body 100 may also include a connecting pipe 30, which is connected to the external drain pipe 20. External drain water can be discharged through the connecting pipe 30. The connecting pipe 30 may also be connected to an external drain pipe to facilitate the removal of residual water from the inner tank during water heater maintenance. The connecting pipe 30 and the external drain pipe 20 may be integrally formed or separate structures. In embodiments where the connecting pipe 30 and the external drain pipe 20 are separate, they can be connected together by welding or threaded connections.

[0048] Combination Figure 3 and Figure 4 In some embodiments of this utility model, one end of the external leakage pipe 20 is disposed in the first mounting hole 132, and the outer surface of one end of the external leakage pipe 20 is sealed to the inner surface of the first mounting hole 132. In other words, one end of the external leakage pipe 20 is accommodated in the first mounting hole 132 of the valve body 10, which improves the connection stability between the valve body 10 and the external leakage pipe 20. After the valve body 10 and the external leakage pipe 20 are connected, the sealing performance at the connection between the valve body 10 and the external leakage pipe 20 can be improved, and fluid leakage from the connection gap between the external leakage pipe 20 and the valve body 10 can be avoided.

[0049] Combination Figure 4 Furthermore, one end face of the external leakage pipe 20 is flush with the inner wall surface of the valve body 10. Specifically, after the external leakage pipe 20 is connected to the valve body 10, the end face of the external leakage pipe 20 is flush with the inner wall surface of the valve body 10; or, after the external leakage pipe 20 is connected to the valve body 10, the end face of the external leakage pipe 20 is made to remain flush with the inner wall surface of the valve body 10 through precision machining. Specifically, the internal leakage valve core 210 is movably disposed in the internal leakage cavity 131, and the end face of the external leakage pipe 20 is flush with the inner wall surface of the valve body 10, which can prevent the external leakage pipe 20 from affecting the internal leakage valve core 210.

[0050] In this application, one end of the external leakage pipe 20 is connected to one end of the valve body 10.

[0051] Combination Figure 2 and Figure 4 In some embodiments of this utility model, the inner surface of the first interface 11 is provided with a first internal thread 14, which extends to the inner wall surface of the valve body 10 and the end face of one end of the external leakage pipe 20. Exemplarily, the first interface 11 can be connected to the anti-electric shock wall, and the first internal thread 14 of the first interface 11 can engage with the external thread of the anti-electric shock wall, improving the connection stability between the anti-electric shock wall and the safety valve 1000. The first internal thread 14 extends to the inner wall surface of the valve body 10 and the end face of one end of the external leakage pipe 20, giving the first internal thread 14 a relatively long length in the axial direction of the valve body 10, thus improving the connection stability between the safety valve 1000 and the anti-electric shock wall.

[0052] Furthermore, the safety valve 1000 may also include a filter element 400, which can be used to filter water flowing into the inner tank. The filter element 400 can also limit the reset element of the internal leakage valve core 210. The filter element 400 is threadedly engaged with the first internal thread 14, improving the connection stability between the filter element 400 and the valve body 100. In conjunction with the foregoing, the first internal thread 14 extends to the end face of one end of the external leakage pipe 20, giving the first internal thread 14 a relatively long length in the axial direction of the valve body 10, which facilitates the fixing of the filter element 400 through the first internal thread 14.

[0053] For example, after the external leakage pipe 20 is connected to the valve body 10, a first internal thread 14 can be machined on the end face of one end of the valve body 10 and the external leakage pipe 20 by means of milling or turning.

[0054] In some embodiments of this utility model, the valve body 10 and the external leakage pipe 20 are welded together. By setting the valve body 10 and the external leakage pipe 20 as a separate structure and welding them together, it is convenient to set anti-corrosion structures on the valve body 10 and the external leakage pipe 20. On the other hand, there is no need to add additional connecting parts, and the problem of loose connection between the valve body 10 and the external leakage pipe 20 is avoided, thereby improving the connection stability and production efficiency of the valve body 10 and the external leakage pipe 20.

[0055] In some embodiments, the valve body 10 and the external leakage pipe 20 are laser welded, which can improve the welding efficiency of the valve body 10 and the external leakage pipe 20 and reduce the production cost of the valve body 100.

[0056] In some embodiments, the valve body 10 and the external drain pipe 20 are integrally welded together in a furnace, which can reduce the risk of gaps at the connection point between the valve body 10 and the external drain pipe 20, thereby reducing gap corrosion and improving the reliability of the safety valve 1000. Specifically, when the valve body 10 and the external drain pipe 20 are integrally welded together in a furnace, the valve body 10 and the external drain pipe 20 can be initially connected together, that is, pre-positioned. For example, the valve body 10 and the external drain pipe 20 can be pre-positioned by filler wire spot welding; or, a pre-positioning structure can be provided on the valve body 10 and the external drain pipe 20, for example, the valve body 10 and the external drain pipe 20 can be pre-positioned by a snap-fit ​​structure. After the valve body 10 and the external leakage pipe 20 are initially connected together, welding paste is applied to the outer surface of the connection between the valve body 10 and the external leakage pipe 20, and the valve body 100 is placed in the welding furnace for reflow welding. When the valve body 100 is placed in the welding furnace for welding, the welding paste can fill the gap at the connection between the valve body 10 and the external leakage pipe 20 under the action of siphon, thereby improving the sealing performance at the connection between the valve body 10 and the external leakage pipe 20 and reducing the risk of crevice corrosion.

[0057] Combination Figure 4In some embodiments of this utility model, the external leakage pipe 20 includes a pipe body 22 and a mating part 23. One end of the pipe body 22 is connected to the valve body 10, and the mating part 23 is disposed at one end of the pipe body 22. The mating part 23 has an external leakage port 231 opposite to the channel inside the pipe body 22, and the periphery of the external leakage port 231 is provided with annular ribs 232 facing the channel inside the pipe body 22. Figure 6 For example, the safety valve 1000 may include an external leakage valve core 220, which is disposed in the external leakage chamber 21. The external leakage valve core 220 can be used to open and close the external leakage port 231 to control the connection and disconnection between the internal leakage chamber 131 and the external leakage chamber 21. In other words, the pipe body 22 can be used to accommodate the external leakage valve core 220, and the external leakage valve core 220 cooperates with the mating part 23 to open and close the external leakage port 231. When the external leakage valve core 220 closes the external leakage port 231, the water in the inner tank of the electric water heater will not be discharged through the external leakage port 231. When the external leakage valve core 220 opens the external leakage port 231, the water in the inner tank can be discharged through the external leakage port 231, thereby relieving pressure on the inner tank using the external leakage port 231. During the heating process of the electric water heater, as the pressure in the inner tank increases and reaches the external leakage pressure opening value, the external leakage channel is opened, and the pressure in the inner tank is reduced by the external leakage of water to protect the inner tank. By providing an annular rib 232 extending toward the inner channel of the pipe body 22 around the periphery of the external discharge port 231, the sealing performance of the safety valve 1000 can be improved when the external discharge valve core 220 closes the external discharge port 231.

[0058] The mating part 23 and the pipe body 22 can be an integral structure. For example, the external leakage pipe 20 can be made entirely of stainless steel, which facilitates the processing and forming of the external leakage pipe 20. Both the pipe body 22 and the mating part 23 are made of stainless steel, which gives the external leakage pipe 20 good corrosion resistance and stability, reduces the problem of erosion gaps in the mating part 23 after long-term use, and gives the external leakage pipe 20 high structural strength. Alternatively, the mating part 23 and the pipe body 22 can be separate structures. For example, the pipe body 22 can be made of metals such as copper or stainless steel, which improves the structural strength of the external leakage pipe 20, and the mating part 23 can be made of plastic. In combination with the above, the valve body 10 and the external leakage pipe 20 are separate structures, which makes it easy to install the mating part 23 on the pipe body 22. The mating part 23 has good corrosion resistance and stability, which can effectively reduce the risk of erosion gaps in the external leakage port 231 after long-term use and improve the service life of the safety valve 1000.

[0059] The part of the external leakage valve core 220 that mates with the external leakage port 231 can be made of flexible material such as rubber. When the external leakage valve core 220 blocks the external leakage port 231, the rubber part is compressed and can fill the gap between the mating part 23 and the external leakage valve core 220, blocking the leakage of fluid from the external leakage port 231. In conjunction with the above, the mating part 23 has good corrosion resistance and stability. Therefore, the mating of the external leakage valve core 220 with the annular rib 232 of the mating part 23 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 23 after long-term use, and extend the service life of the safety valve 1000.

[0060] Combination Figure 4 In some embodiments of this utility model, the valve body 10 is constructed as a tube, and the first interface 11, the second interface 12 and the main body 13 are arranged along the axis of the valve body 10, which facilitates the processing and forming of the valve body 10 and improves the production efficiency of the valve body 10.

[0061] In some embodiments of this utility model, the external leakage pipe 20 is configured as a tube with its axis perpendicular to the axis of the valve body 10, which facilitates the installation of the external leakage pipe 20 and the valve body 10, and provides high stability after installation.

[0062] In some embodiments of this utility model, the valve body 10 is made of stainless steel pipe, which gives the valve 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.

[0063] In some embodiments of this utility model, the external leakage pipe 20 is a stainless steel pipe. The stainless steel external leakage pipe 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.

[0064] In one embodiment of this utility model, both the valve body 10 and the external leakage pipe 20 are made of stainless steel. 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 valve body 10 and the external leakage pipe 20 of stainless steel, 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.

[0065] In some embodiments of this utility model, the external drain pipe 20 and the valve body 10 are configured such that the external drain pipe 20 is inserted into the first mounting hole 132 of the valve body 10 and spot-welded together, and solder paste is applied to the connection between the valve body 10 and the external drain pipe 20 and then placed in a welding furnace for reflow welding. Exemplarily, when assembling the valve body 100, the following steps are performed: First, the external drain pipe 20 is inserted into the first mounting hole 132 of the valve body 10, and at least one filler laser spot weld is performed at the connection between the external drain pipe 20 and the valve body 10 to initially connect the external drain pipe 20 and the valve body 10 together; Second, solder paste is applied to the outer surface of the connection between the valve body 10 and the external drain pipe 20, and the valve body 100 is placed in a welding furnace for reflow welding. During welding in the welding furnace, the solder paste can fill the gap at the connection between the valve body 10 and the external drain pipe 20 under the action of siphon, thereby improving the sealing performance at the connection between the valve body 10 and the external drain pipe 20 and reducing the risk of crevice corrosion.

[0066] The solder paste can be nickel-based or copper-based, etc.

[0067] For example, the solder paste can be nickel-based solder paste (BNi-15), with a reflow soldering temperature of 1040–1120°C; or, the solder paste can be copper solder paste, with a reflow soldering temperature of 1100–1120°C. During reflow soldering, the high-temperature zone time is controlled to 10–15 minutes to improve the welding stability between the external discharge pipe 20 and the valve body 10, reduce the risk of gaps between the external discharge pipe 20 and the valve body 10, thereby effectively reducing the risk of gap corrosion and improving the reliability of the safety valve 1000.

[0068] Combination Figures 2 to 4 In some embodiments of this utility model, the side wall of the external drain pipe 20 is provided with a second mounting hole 24, which communicates with the external drain cavity 21. The valve body 100 also includes a connecting pipe 30, one end of which is connected to the periphery of the second mounting hole 24. The connecting pipe 30 is provided with a drain outlet 31 communicating with the external drain cavity 21. When the external drain valve core 220 opens the external drain outlet 231, water in the inner tank enters the connecting pipe 30 through the external drain outlet 231 and is discharged through the drain outlet 31 of the connecting pipe 30 to relieve pressure on the inner tank. In addition, the connecting pipe 30 can also be used as an external drain pipe to facilitate the discharge of residual water in the inner tank during maintenance of the electric water heater. The external drain pipe 20 and the connecting pipe 30 are designed as separate structures, which reduces the difficulty of processing and forming the external drain pipe 20 and the connecting pipe 30, facilitates the setting of an anti-corrosion structure in the external drain pipe 20, and improves the anti-corrosion performance of the valve body 100.

[0069] Specifically, the valve body 100 of this utility model embodiment may be composed of three separate parts. In conjunction with the foregoing, in related technologies, the valve body 100 is usually made of copper and integrally formed, and then the inner side of the valve body 100 is anti-corrosion by electroplating. The anti-corrosion electroplating process inside the valve body 100, especially at the external leakage port 231, is difficult to control the thickness. By setting the main body 13, the external leakage pipe 20 and the connecting pipe 30 of the valve body 100 as separate structures, it is easier to set anti-corrosion structures on the inner side of the main body 13 and the external leakage pipe 20, thereby improving the anti-corrosion performance of the valve body 100 and extending the service life of the safety valve 1000.

[0070] In addition, the valve body 10, the external leakage pipe 20 and the connecting pipe 30 are all designed as separate structures, which makes it easy to adjust and optimize the structure of the valve body 10, the external leakage pipe 20 and the connecting pipe 30 individually. Compared with the one-piece structure of the valve body 100, it avoids the need to adjust the mold of the entire valve body 100 when the structure and parameters of the external leakage pipe 20, the valve body 10 and the connecting pipe 30 need to be adjusted individually.

[0071] The external leakage pipe 20 and the connecting pipe 30 can be connected together by welding, or by sealing them together by threading or adhesive.

[0072] Combination Figure 4 In some embodiments of this utility model, one end of the connecting pipe 30 is disposed within the second mounting hole 24, and the outer surface of one end of the connecting pipe 30 is sealed to the inner surface of the second mounting hole 24. In other words, one end of the connecting pipe 30 is accommodated within the second mounting hole 24 of the external discharge pipe 20, which improves the connection stability between the external discharge pipe 20 and the connecting pipe 30. Furthermore, after the external discharge pipe 20 and the connecting pipe 30 are connected, the sealing performance at the connection point between the external discharge pipe 20 and the connecting pipe 30 is improved, preventing fluid leakage from the connection gap between the external discharge pipe 20 and the connecting pipe 30.

[0073] Combination Figure 4 Furthermore, one end face of the connecting pipe 30 is flush with the inner wall surface of the external discharge pipe 20. Specifically, after the connecting pipe 30 is connected to the external discharge pipe 20, the end face of the connecting pipe 30 is flush with the inner wall surface of the external discharge pipe 20; or, after the connecting pipe 30 is connected to the external discharge pipe 20, the end face of the connecting pipe 30 is made to remain flush with the inner wall surface of the external discharge pipe 20 through precision machining. Specifically, the external discharge valve core 220 is movably disposed in the external discharge cavity 21, and the end face of the connecting pipe 30 is flush with the inner wall surface of the external discharge pipe 20, which can prevent the connecting pipe 30 from affecting the movement of the external discharge valve core 220.

[0074] In this application, one end of the connecting pipe 30 is connected to the end of the external leakage pipe 20.

[0075] Combination Figure 2 and Figure 4 In some embodiments of this utility model, the inner side of the external discharge pipe 20 is provided with a second internal thread 25, which extends to the end face of one end of the connecting pipe 30. Exemplarily, one end of the external discharge pipe 20 is connected to the valve body 10, and the other end of the external discharge pipe 20 may be provided with an end cap 300. The safety valve 1000 may include a control handle 230, one end of the external discharge valve core 220 is engaged with the external discharge port 231, and the other end of the external discharge valve core 220 may pass through the end cap 300 and be connected to the control handle 230. The external discharge valve core 220 can be manually driven to open the external discharge port 231 by the control handle 230. The end cap 300 can be threadedly connected to the second internal thread 25 to improve the connection stability between the end cap 300 and the valve body 100. Furthermore, the external leakage valve core 220 may include a clamping sleeve 221, which is fixedly connected to the valve body 100. The clamping sleeve 221 can stop the reset component of the external leakage valve core 220. The external thread of the clamping sleeve 221 can be threadedly engaged with the second internal thread 25, thereby improving the connection stability between the clamping sleeve 221 and the valve body 100. By extending the second internal thread 25 to the end face of one end of the connecting pipe 30, the second internal thread 25 has a longer length in the axial direction of the external leakage pipe 20, thereby improving the connection stability between the end cap 300, the clamping sleeve 221, and other structures and the valve body 100.

[0076] For example, after the external discharge pipe 20 is connected to the connecting pipe 30, a second internal thread 25 can be machined on the end face of one end of the external discharge pipe 20 and the connecting pipe 30 by means of milling or turning.

[0077] In some embodiments of this utility model, the external discharge pipe 20 and the connecting pipe 30 are welded together. By setting the external discharge pipe 20 and the connecting pipe 30 as separate structures and welding them together, it is convenient to set anti-corrosion structures on the external discharge pipe 20 and the connecting pipe 30, and no additional connecting parts are needed. This avoids the problem of loose connection between the external discharge pipe 20 and the connecting pipe 30, and improves the connection stability and production efficiency of the external discharge pipe 20 and the connecting pipe 30.

[0078] In some embodiments, the external discharge pipe 20 and the connecting pipe 30 are laser welded, which can improve the welding efficiency of the external discharge pipe 20 and the connecting pipe 30 and reduce the production cost of the valve body 100.

[0079] For example, both the external discharge pipe 20 and the connecting pipe 30 can be made of stainless steel. Compared to 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. Alternatively, a plastic layer or a stainless steel layer can be provided on the inner side of the external discharge pipe 20 or the connecting pipe 30, and then the external discharge pipe 20 and the connecting pipe 30 can be welded together. The plastic layer or stainless steel layer has good stability and corrosion resistance, which can reduce the impact of long-term fluid erosion.

[0080] In some embodiments, the external discharge pipe 20 and the connecting pipe 30 are laser welded, which can improve the welding efficiency of the external discharge pipe 20 and the connecting pipe 30 and reduce the production cost of the valve body 100.

[0081] In some embodiments, the external discharge pipe 20 and the connecting pipe 30 are integrally welded together in a furnace, which reduces the risk of gaps at the connection point between the external discharge pipe 20 and the connecting pipe 30, thereby reducing gap corrosion and improving the reliability of the safety valve 1000. Specifically, when the external discharge pipe 20 and the connecting pipe 30 are integrally welded together in a furnace, they can be initially connected together, i.e., pre-positioned. For example, the external discharge pipe 20 and the connecting pipe 30 can be pre-positioned by filler wire spot welding; or, a pre-positioning structure can be provided on the external discharge pipe 20 and the connecting pipe 30, for example, the external discharge pipe 20 and the connecting pipe 30 can be pre-positioned by a snap-fit ​​structure, etc. After the external leakage pipe 20 and the connecting pipe 30 are initially connected together, welding paste is applied to the outer surface of the connection between the external leakage pipe 20 and the connecting pipe 30, and the valve body 100 is placed in the welding furnace for reflow welding. When the valve body 100 is placed in the welding furnace for welding, the welding paste can fill the gap at the connection between the external leakage pipe 20 and the connecting pipe 30 under the action of siphon, thereby improving the sealing performance at the connection between the external leakage pipe 20 and the connecting pipe 30 and reducing the risk of crevice corrosion.

[0082] In some embodiments of this utility model, the connecting pipe 30 is a stainless steel pipe, which gives the connecting pipe 30 high strength and corrosion resistance, so that the safety valve 1000 can maintain good stability even when it is in a humid environment for a long time, thereby improving the service life of the safety valve 1000.

[0083] In some embodiments of this utility model, the connecting pipe 30 and the external drain pipe 20 are configured such that the connecting pipe 30 is inserted into the second mounting hole 24 of the external drain pipe 20 and spot welded together, and that solder paste is applied to the connection between the external drain pipe 20 and the connecting pipe 30 and then placed in a welding furnace for reflow welding.

[0084] For example, the assembly of the connecting pipe 30 and the external drain pipe 20 is performed as follows: First, the connecting pipe 30 is inserted into the second mounting hole 24 of the external drain pipe 20, and at least one filler laser spot weld is performed at the connection between the connecting pipe 30 and the external drain pipe 20 to initially connect the connecting pipe 30 and the external drain pipe 20 together; Second, solder paste is applied to the outer surface of the connection between the external drain pipe 20 and the connecting pipe 30, and the valve body 100 is placed in a welding furnace for reflow welding. During welding in the welding furnace, the solder paste can fill the gap at the connection between the external drain pipe 20 and the connecting pipe 30 under the action of siphon, thereby improving the sealing performance at the connection between the external drain pipe 20 and the connecting pipe 30 and reducing the risk of crevice corrosion.

[0085] In some embodiments of this utility model, the surface of the valve body 100 has a nickel plating layer. Exemplarily, the valve body 10, the external leakage pipe 20, and the connecting pipe 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.

[0086] Combination Figures 1 to 4 In some embodiments of this utility model, the valve body 100 includes a valve body 10, an external leakage pipe 20, and a connecting pipe 30. The valve body 10, the external leakage pipe 20, and the connecting pipe 30 are all stainless steel pipes. The valve body 10 is welded to the external leakage pipe 20, and the external leakage pipe 20 is welded to the connecting pipe 30. Compared with the copper valve body 100, stainless steel has higher corrosion resistance and stability, which can prevent the safety valve 1000 from leaking due to corrosion and wear after long-term use. In addition, stainless steel has high strength, which can improve the overall structural strength of the safety valve 1000, reduce deformation problems during transportation, installation, and use, and improve the overall reliability and service life of the safety valve 1000.

[0087] In some specific embodiments of this utility model, the valve body 100 is assembled according to the following steps: First, the external drain pipe 20 is inserted into the first mounting hole 132 of the valve body 10, and at least one filler laser spot weld is performed at the connection between the external drain pipe 20 and the valve body 10. The connecting pipe 30 is inserted into the second mounting hole 24 of the external drain pipe 20, and at least one filler laser spot weld is performed at the connection between the connecting pipe 30 and the external drain pipe 20, so as to initially connect the valve body 10, the external drain pipe 20 and the connecting pipe 30 together. Second, solder paste is applied to the outer surface of the connection between the valve body 10 and the external drain pipe 20, and solder paste is applied to the outer surface of the connection between the external drain pipe 20 and the connecting pipe 30. The valve body 100 is then placed in a welding furnace for reflow welding. When the valve body 100 is placed in the welding furnace for welding, the solder paste can fill the gaps at the connection between the valve body 10 and the external leakage pipe 20, as well as the gaps between the external leakage pipe 20 and the connecting pipe 30, under the action of siphon, thereby improving the sealing performance at the connection between the valve body 10 and the external leakage pipe 20, as well as the connection between the external leakage pipe 20 and the connecting pipe 30, and reducing the risk of gap corrosion. The third step is to place the valve body 100 in a nickel plating bath for nickel plating treatment to improve the corrosion resistance of the valve body 100.

[0088] The solder paste can be nickel-based or copper-based, etc.

[0089] For example, the solder paste can be nickel-based solder paste (BNi-15), with a reflow soldering temperature of 1040–1120°C; or, the solder paste can be copper solder paste, with a reflow soldering temperature of 1100–1120°C. During reflow soldering, the high-temperature zone time is controlled to 10–15 minutes to improve the welding stability between the external discharge pipe 20 and the valve body 10, reduce the risk of gaps between the external discharge pipe 20 and the valve body 10, thereby effectively reducing the risk of gap corrosion and improving the reliability of the safety valve 1000.

[0090] Combination Figure 5 and Figure 6 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.

[0091] For example, the safety valve 1000 may include an internal leakage valve core 210, which is disposed in the internal leakage cavity 131.

[0092] The safety valve 1000 may also include an external leakage valve core 220, which is located in the external leakage cavity 21.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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 use in a safety valve (1000), characterized in that, include: The valve body (10) has a first interface (11), a second interface (12) and a main body (13). The main body (13) is connected between the first interface (11) and the second interface (12). The main body (13) has an internal leakage cavity (131) that communicates with the first interface (11) and the second interface (12). The side wall of the main body (13) has a first mounting hole (132) that communicates with the internal leakage cavity (131). An external drain pipe (20) is provided, with one end of the external drain pipe (20) connected to the periphery of the first mounting hole (132). The external drain pipe (20) is provided with an external drain cavity (21) that communicates with the internal drain cavity (131).

2. The valve body (100) according to claim 1, characterized in that, One end of the external discharge pipe (20) is disposed in the first mounting hole (132), and the outer surface of the one end of the external discharge pipe (20) is sealed to the inner surface of the first mounting hole (132).

3. The valve body (100) according to claim 2, characterized in that, The end face of one end of the external discharge pipe (20) is flush with the inner wall surface of the valve body (10); And / or, the inner side of the first interface (11) is provided with a first internal thread (14), which extends to the inner wall of the valve body (10) and the end face of the one end of the external discharge pipe (20).

4. The valve body (100) according to claim 1, characterized in that, The valve body (10) is welded to the external discharge pipe (20).

5. The valve body (100) according to claim 4, characterized in that, The valve body (10) and the external leakage pipe (20) are connected as one unit by laser welding or furnace welding.

6. The valve body (100) according to claim 1, characterized in that, The external drain pipe (20) includes a pipe body (22) and a mating part (23). One end of the pipe body (22) is connected to the valve body (10). The mating part (23) is located at the same end of the pipe body (22). The mating part (23) has an external drain port (231) that is opposite to the channel inside the pipe body (22). The periphery of the external drain port (231) is provided with annular ribs (232) that face the channel inside the pipe body (22).

7. The valve body (100) according to claim 1, characterized in that, The valve body (10) is constructed in a tubular shape, and the first interface (11), the second interface (12) and the main body (13) are arranged along the axis of the valve body (10); And / or, the external drain pipe (20) is configured as a tube with its axis perpendicular to the axis of the valve body (10); And / or, the valve body (10) and / or the external leakage pipe (20) are stainless steel pipes.

8. The valve body (100) according to claim 1, characterized in that, The side wall of the external discharge pipe (20) is provided with a second mounting hole (24), which communicates with the external discharge cavity (21). The valve body (100) further includes: A connecting pipe (30) is provided, one end of which is connected to the periphery of the second mounting hole (24), and a drain outlet (31) communicating with the external discharge cavity (21) is provided inside the connecting pipe (30).

9. The valve body (100) according to claim 8, characterized in that, One end of the connecting pipe (30) is disposed in the second mounting hole (24), and the outer surface of the one end of the connecting pipe (30) is sealed to the inner surface of the second mounting hole (24).

10. The valve body (100) according to claim 8, characterized in that, The end face of one end of the connecting pipe (30) is flush with the inner wall surface of the external discharge pipe (20); And / or, the inner side of the external discharge pipe (20) is provided with a second internal thread (25), the second internal thread (25) extending to the end face of the one end of the connecting pipe (30); And / or, the connecting pipe (30) is a stainless steel pipe.

11. The valve body (100) according to claim 8, characterized in that, The external discharge pipe (20) is welded to the connecting pipe (30).

12. The valve body (100) according to claim 11, characterized in that, The external discharge pipe (20) and the connecting pipe (30) are connected as one unit by laser welding or furnace welding.

13. The valve body (100) according to claim 1, characterized in that, The surface of the valve body (100) has a nickel plating layer.

14. A safety valve (1000), characterized in that, include: Valve body (100) according to any one of claims 1-13; An internal leakage valve core (210) is disposed in the internal leakage cavity (131); An external leakage valve core (220) is disposed in the external leakage cavity (21).

15. An electric water heater, characterized in that, Includes the safety valve (1000) as described in claim 14.

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