Internal release valve core of safety valve, safety valve and water heater

Abstract

The utility model relates to the technical field of valve bodies, and particularly discloses an internal release valve element of a safety valve, the safety valve and a water heater, the internal release valve element comprises a valve seat, a valve element, a first reset piece and a limiting piece, and the valve seat is provided with a pressure release hole; the valve element can move along the axis of the pressure relief hole so as to open and close the pressure relief hole. The first reset piece has elastic force for driving the valve element to close the pressure relief hole. The limiting piece is configured to guide the valve element to move along the axis of the pressure relief hole. According to the internal release valve element, the valve element can open and close the pressure release hole of the valve seat, the limiting piece is arranged to guide the valve element to move along the axis of the pressure release hole, vibration of the valve element in the moving process is reduced, noise of a safety valve in the pressure release process is further reduced, and the working stability of the safety valve can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to an internal leakage valve core, a safety valve and a water heater. Background Art

[0002] Existing electric water heaters are usually equipped with a safety valve structure. During the heating process, as the pressure in the electric water heater tank increases and reaches the internal leakage pressure opening value, the internal leakage channel is opened. When the safety valve releases pressure, the valve core is easily vibrated by the pressure of the fluid, which in turn causes vibration noise, affecting the user experience. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present invention is to provide an internal leakage valve core of a safety valve, which can reduce the noise of the safety valve during the pressure relief process.

[0004] Another object of the present invention is to provide a safety valve comprising the aforementioned internal leakage valve core.

[0005] Another object of the present invention is to provide a water heater comprising the aforementioned safety valve.

[0006] According to an embodiment of the present invention, the internal leakage valve core of the safety valve includes: a valve seat, a valve core, a first reset member and a limit member, the valve seat is provided with a pressure relief hole; the valve core is movable along the axis of the pressure relief hole to open and close the pressure relief hole; the first reset member has an elastic force driving the valve core to close the pressure relief hole; the limit member is configured to guide the valve core to move along the axis of the pressure relief hole.

[0007] According to the internal leakage valve core of the safety valve in the embodiment of the present invention, the valve core can open and close the pressure relief hole of the valve seat. By setting a limit member to guide the valve core to move along the axis of the pressure relief hole, the vibration of the valve core during movement is reduced, thereby reducing the noise of the internal leakage valve core during the pressure relief process, and can improve the working stability of the safety valve.

[0008] In addition, the internal leakage valve core according to the above embodiment of the utility model may also have the following additional technical features:

[0009] In some embodiments, the limiting member is connected to the valve core and is slidably engaged with the valve seat along the axis of the pressure relief hole.

[0010] In some embodiments, the valve seat includes a cylinder, the cylinder extends along the axis of the pressure relief hole, the pressure relief hole is provided on the inner side of one end of the cylinder, and the limiting member is axially movably provided through the cylinder.

[0011] In some embodiments, the inner circumference of the cylinder includes a first guide surface, the outer circumference of the stopper includes a second guide surface, and the second guide surface is movably provided on the inner side of the first guide surface along the axis of the pressure relief hole.

[0012] In which, the first guide surface is set as a non-circular cylinder, and the second guide surface is set as a non-circular cylinder adapted to the first guide surface; or, the first guide surface is set as a polygonal cylinder, and the second guide surface is set as a polygonal cylinder adapted to the first guide surface; or, the gap between the first guide surface and the second guide surface is not greater than 1 mm; or, the first guide surface is set at the other end of the cylinder.

[0013] In some embodiments, the limiting member includes a positioning protrusion, which is provided on the outside of the cylinder, protrudes from the inner circumference of the cylinder and is opposite to the other end of the cylinder along the axial direction of the pressure relief hole.

[0014] In some embodiments, the limiting member is threadedly connected to the valve core; and / or, the limiting member is clearance-matched with the valve seat; and / or, the limiting member is key-connected to the valve seat.

[0015] In some embodiments, the limit member is connected to the valve seat, and the valve core is slidably engaged with the limit member along the axis of the pressure relief hole; or, the limit member is arranged between the valve seat and the valve core, and the limit member is slidably engaged with the valve seat and the valve core along the axis of the pressure relief hole.

[0016] In some embodiments, the valve core includes a valve stem and a valve plate, the valve plate is arranged on the side of the pressure relief hole, the valve stem is connected to the valve plate, and is passed through the pressure relief hole and the valve seat, and the limit member cooperates with the valve stem and the valve seat to guide the movement of the valve core.

[0017] In some embodiments, the valve seat includes a cylinder and an end plate, the end plate cover is on one end of the cylinder, the pressure relief hole is provided on the end plate, and the peripheral wall of the cylinder is provided with an internal leakage channel connecting the internal space of the cylinder and the pressure relief hole.

[0018] In some embodiments, the valve core is provided through the cylinder, and the stopper is provided at the other end of the cylinder and blocks at least a portion of the other end of the cylinder;

[0019] And / or, a plurality of the internal leakage channels are provided on the peripheral wall of the cylinder.

[0020] According to an embodiment of the present invention, the safety valve includes: a valve body, the aforementioned internal leakage valve core and a second reset member, the valve body having an internal leakage cavity and a connecting port and an internal leakage port connected to the internal leakage cavity; the internal leakage valve core is arranged in the internal leakage cavity and is used to connect and separate the connecting port and the internal leakage port; the second reset member has an elastic force that drives the internal leakage valve core to close the internal leakage port.

[0021] In some embodiments, the valve body is further provided with an external leakage port communicating with the internal leakage cavity, and the safety valve further comprises an external leakage valve core, which is configured to open and close the external leakage port.

[0022] According to an embodiment of the present invention, the water heater comprises: an inner tank and the aforementioned safety valve, wherein the inner tank has a water storage chamber and a water inlet communicating with the water storage chamber; and the connecting port is connected to the water inlet.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal leakage valve core of an embodiment of the present utility model.

[0025] Figure 2 It is a cross-sectional schematic diagram of the internal leakage valve core of an embodiment of the present utility model.

[0026] Figure 3 It is an explosion diagram of the internal leakage valve core of the embodiment of the present utility model.

[0027] Figure 4 It is a schematic diagram of a safety valve according to an embodiment of the present utility model.

[0028] Figure 5 It is a schematic cross-sectional view of a safety valve according to an embodiment of the present invention.

[0029] Figure 6 It is a cross-sectional schematic diagram of a safety valve in the related art.

[0030] Reference numerals:

[0031] Safety valve 1000, internal leakage valve core 100, valve seat 10, pressure relief hole 11, cylinder 12, first guide surface 121, internal leakage channel 122, end plate 13, valve core 20, valve stem 21, valve disc 22, first reset member 30, limit member 40, second guide surface 41, positioning protrusion 42, buffer member 50, valve body 200, internal leakage cavity 210, connecting port 220, internal leakage port 230, external leakage port 240, second reset member 300, external leakage valve core 400. DETAILED DESCRIPTION

[0032] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] In equipment such as electric water heaters, when the fluid in the system is heated, the system pressure will rise. When the pressure in the system exceeds the safety limit, a safety valve needs to be installed to release the pressure in the system to protect the safe use of the equipment.

[0034] Combine Figure 1 and Figure 2 According to the embodiment of the present invention, the internal leakage valve core 100 can be used for a safety valve. The internal leakage valve core 100 includes: a valve seat 10 and a valve core 20. The valve seat 10 is provided with a pressure relief hole 11. The valve core 20 can move along the axis of the pressure relief hole 11 to open and close the pressure relief hole 11. When the pressure in the system needs to be released, the pressure relief hole 11 can be opened by the valve core 20 to release the pressure in the system and maintain the stable operation of the system. Figure 2 As shown, the axis of the pressure relief hole 11 is A.

[0035] Combine Figure 2 The internal leakage valve core 100 also includes a first reset element 30, which has an elastic force that drives the valve core 20 to close the pressure relief hole 11. Specifically, when the system pressure does not exceed the safety value, that is, when the system pressure is normal, the first reset element 30 can drive the valve core 20 to close the pressure relief hole 11, and the safety valve 1000 can be in a closed and sealed state, preventing the medium in the system from escaping. When the system pressure exceeds the safety value, the system pressure overcomes the elastic force of the first reset element 30, driving the valve core 20 to open the pressure relief hole 11. Exemplarily, the first reset element 30 can be a spring.

[0036] Recombination Figure 2 The internal leakage valve core 100 also includes a limiter 40, which is configured to guide the valve core 20 to move along the axis of the pressure relief hole 11. The limiter 40 can prevent the valve core 20 from swinging in the radial direction of the pressure relief hole 11 during movement, reduce the vibration of the valve core 20 during movement, and thus reduce the noise of the safety valve 1000 during pressure relief, and improve the working stability of the safety valve 1000. Figure 2 , the axis of the pressure relief hole 11 is A.

[0037] For example, an internal leakage channel may be provided in the safety valve 1000. When the valve core 20 closes and opens the pressure relief hole 11, the fluid in the system circulates at high speed in the internal leakage channel, which easily generates discrete pressure waves in the internal leakage channel, causing the valve core 20 to vibrate and cause noise. By setting a limit member 40 to guide the valve core 20 to move along the axial direction of the pressure relief hole 11, the noise caused by the vibration of the valve core 20 in the process of opening and closing the pressure relief hole 11 can be reduced.

[0038] According to the internal leakage valve core 100 of the embodiment of the present invention, the valve core 20 can open and close the pressure relief hole 11 of the valve seat 10. By setting a limit member 40 to guide the valve core 20 to move along the axis of the pressure relief hole 11, the vibration of the valve core 20 during the movement is reduced, thereby reducing the noise of the internal leakage valve core 100 during the pressure relief process, and can improve the working stability of the safety valve 1000.

[0039] The internal leakage valve core 100 of the present invention can be used in devices that need to control the internal pressure of pipes or equipment, such as electric water heaters, air conditioning systems, etc., to prevent excessive pressure from affecting the safe operation of the equipment. This application mainly uses water heaters as an example for explanation.

[0040] For example, the internal leakage valve core 100 can be used in an electric water heater, which may include an inner tank. When the water pressure in the inner tank exceeds the tap water pressure at the water supply end and exceeds the pressure safety value, the water pressure in the inner tank can act on the valve core 20, overcoming the elastic force of the first return member 30 to drive the valve core 20 to open the pressure relief hole 11, thereby relieving the pressure in the inner tank and improving the safety of the water heater. It can be understood that when the valve core 20 opens and closes the pressure relief hole 11, discrete pressure waves exist in the internal leakage channel of the safety valve 1000. The discrete internal leakage pressure and the elastic force of the first return member 30 form a pair of interacting dynamic equilibrium forces, which can easily cause vibration during the movement of the valve core 20, causing the safety valve 1000 to generate noise. The internal leakage valve core 100 of the present invention provides a limiter 40 to guide the valve core 20 along the axis of the pressure relief hole 11, thereby improving the movement stability of the valve core 20, preventing the valve core 20 from vibrating and causing noise when subjected to the discrete pressure of the water flow, and improving the operating stability of the safety valve 1000.

[0041] The stopper 40 is configured to guide the valve core 20 to move along the axis A of the pressure relief hole 11. For example, the stopper 40 may be connected to the valve core 20, and the stopper 40 may slidably cooperate with the valve seat 10 along the axis of the pressure relief hole 11; or, the stopper 40 may be connected to the valve seat 10, and the valve core 20 may slidably cooperate with the stopper 40 along the axis of the pressure relief hole 11; or, the stopper 40 may be provided between the valve seat 10 and the valve core 20, and the stopper 40 may slidably cooperate with the valve seat 10 and the valve core 20 along the axis of the pressure relief hole 11. By providing the stopper 40 to guide the valve core 20 to move along the axis of the pressure relief hole 11, the swing of the valve core 20 along the radial direction of the pressure relief hole 11 is reduced, the movement stability of the valve core 20 is improved, and the vibration of the valve core 20 during movement is reduced, thereby reducing the noise of the safety valve 1000 during operation.

[0042] Combine Figure 2 In some embodiments of the present invention, the limiting member 40 is connected to the valve core 20 and slidably cooperates with the valve seat 10 along the axis of the pressure relief hole 11. Specifically, the position of the valve seat 10 is relatively fixed. When the pressure value in the system exceeds the safety value, the pressure in the system acts on the valve core 20 and overcomes the elastic force of the first reset member 30, driving the valve core 20 to open the pressure relief hole 11, while also driving the limiting member 40 to move. The limiting member 40 cooperates with the valve seat 10 to facilitate the limiting member 40 to slide along the axis of the pressure relief hole 11, thereby stably limiting the sliding of the valve core 20 along the axis of the pressure relief hole 11, making the structure of the internal leakage valve core 100 simple and improving the movement stability of the valve core 20.

[0043] For example, a guide structure may be provided between the limiting member 40 and the valve core 20 , and the guide structure may guide the movement of the limiting member 40 so that the limiting member 40 may move along the axis of the pressure relief hole 11 .

[0044] Combine Figure 2 and Figure 3 Furthermore, the valve seat 10 includes a cylinder 12, which extends along the axis of the pressure relief hole 11. The pressure relief hole 11 is provided on the inner side of one end of the cylinder 12. The limiter 40 is movably provided in the cylinder 12 along the axial direction. The cylinder 12 can limit the limiter 40, thereby improving the stability of the limiter 40, and then stably driving the valve core 20 to move along the axial direction of the pressure relief hole 11, thereby improving the reliability of the internal leakage valve core 100 and reducing the noise of the safety valve 1000 during the pressure relief process.

[0045] Combine Figure 3In some embodiments of the present invention, the inner circumference of the cylinder 12 includes a first guide surface 121, and the outer circumference of the stopper 40 includes a second guide surface 41. The second guide surface 41 is movably disposed inside the first guide surface 121 along the axis of the pressure relief hole 11. The first guide surface 121 and the second guide surface 41 cooperate to guide the movement of the stopper 40, improving the movement stability of the stopper 40, and thereby stably driving the valve core 20 to move along the axis of the pressure relief hole 11.

[0046] The first guide surface 121 and the second guide surface 41 may be configured as different structures.

[0047] In the first embodiment of the present invention, the first guide surface 121 is configured as a non-circular cylindrical surface, and the second guide surface 41 is configured as a non-circular cylindrical surface that matches the first guide surface 121. For example, the cross-section of the cylinder 12 can be eccentrically circular, elliptical, or the like. The first guide surface 121 and the second guide surface 41 are configured as non-cylindrical surfaces to facilitate guiding the movement of the stopper 40 along the axis of the pressure relief hole 11 through the cylinder 12, thereby preventing the stopper 40 from shaking within the cylinder 12 when the valve core 20 is subjected to fluid pressure.

[0048] In the second embodiment of the present invention, the first guide surface 121 is configured as a polygonal cylinder, and the second guide surface 41 is configured as a polygonal cylinder adapted to the first guide surface 121. For example, the cross-section of the cylinder 12 can be triangular, quadrilateral, pentagonal, hexagonal, etc., and the first guide surface 121 and the second guide surface 41 are configured as polygonal cylinders, which facilitates guiding the movement of the stopper 40 along the axial direction through the cylinder 12, thereby preventing the stopper 40 from shaking within the cylinder 12 when the valve core 20 is subjected to fluid pressure, and can also enhance the structural strength of the internal leakage valve core 100.

[0049] In some embodiments of the present invention, the gap between the first guide surface 121 and the second guide surface 41 is no more than 1 mm, so that the limit member 40 can move axially relative to the cylinder 12, and avoid the gap between the first guide surface 121 and the second guide surface 41 being too large, causing the limit member 40 to shake in the cylinder 12 when the fluid impacts the valve core 20.

[0050] Combine Figure 2 and Figure 3 In some embodiments of the present invention, the first guide surface 121 is provided at the other end of the cylinder 12, that is, the stopper 40 is close to the other end of the cylinder 12. In combination with the above, the pressure relief hole 11 is provided at one end of the cylinder 12, and the first guide surface 121 is provided at the other end of the cylinder 12. This facilitates the installation of the internal leakage valve core 100 and facilitates the stable movement of the valve core 20 along the axis of the pressure relief hole 11 by the stopper 40, so that the valve core 20 can stably close and open the pressure relief hole 11.

[0051] For example, when installing the internal leakage valve core 100, the valve core 20 can be first installed on the valve seat 10 from the lower end of the cylinder 12, and then the stopper 40 can be connected to the valve core 20 from the upper end of the cylinder 12. The pressure relief hole 11 is provided on the inner side of the lower end of the cylinder 12, which facilitates the closing and opening of the pressure relief hole 11 by the valve core 20. The first guide surface 121 is provided on the upper end of the cylinder 12, so that the second guide surface 41 of the stopper 40 cooperates with the first guide surface 121 of the cylinder 12 to limit the movement of the valve core 20, thereby improving the movement stability of the valve core 20 and reducing the noise generated by the valve core 20 when it is subjected to fluid impact vibration. The internal leakage valve core 100 of the present utility model embodiment has a simple structure, a reliable structure, and is easy to install.

[0052] Combine Figure 2 and Figure 3 In some embodiments of the present invention, the limiting member 40 includes a positioning protrusion 42, which is provided on the outside of the cylinder 12, protrudes from the inner circumferential surface of the cylinder 12, and is opposite to the other end of the cylinder 12 along the axial direction of the pressure relief hole 11. The positioning protrusion 42 can limit the movement of the valve core 20, prevent the valve core 20 from being separated from the valve seat 10 under the pressure of the system, and improve the structural stability of the internal leakage valve core 100. Specifically, when the pressure in the system exceeds the safety value, the pressure in the system drives the valve core 20 to move and open the pressure relief hole 11, and the positioning protrusion 42 can abut against the end surface of the cylinder 12, which can limit the valve core 20 from continuing to move along the axial direction, prevent the valve core 20 from being separated from the valve seat 10, and improve the structural stability of the internal leakage valve core 100.

[0053] In some embodiments of the present invention, the limit member 40 is threadedly connected to the valve core 20, which facilitates the fixation of the limit member 40 and the valve core 20, improves the connection stability between the limit member 40 and the valve core 20, and facilitates the subsequent replacement of parts.

[0054] In some embodiments of the present invention, the limiter 40 is loosely fitted with the valve seat 10 , which facilitates installation of the limiter 40 and the valve seat 10 and facilitates fit between the limiter 40 and the valve seat 10 , allowing the limiter 40 to slide axially relative to the valve seat 10 .

[0055] In some embodiments of the present invention, the stopper 40 is key-connected to the valve seat 10. For example, the stopper 40 may be provided with a flat key extending along the axis of the pressure relief hole 11, and the inner side of the valve seat 10 may be provided with a key slot, in which the flat key is slidably disposed, thereby facilitating the guidance of the movement of the stopper 40 and improving the movement stability of the stopper 40. The stopper 40 is limited by the valve seat 10, facilitating the stopper 40 to guide the valve core 20 to move stably along the axis of the pressure relief hole 11, thereby preventing the valve core 20 from shaking in the radial direction when impacted by fluid, and reducing the noise generated by the internal leakage valve core 100 during the pressure relief process.

[0056] In other embodiments of the present invention, a stopper 40 is connected to the valve seat 10, and the valve core 20 slidably cooperates with the stopper 40 along the axis of the pressure relief hole 11. Specifically, the position of the valve seat 10 is relatively fixed, and the stopper 40 is fixed relative to the valve seat 10. When the pressure value in the system exceeds the safe value, the pressure in the system acts on the valve core 20, and the stopper 40 can guide the movement of the valve core 20, driving the valve core 20 to move along the axis A of the pressure relief hole 11 to open and close the pressure relief hole 11. This prevents the valve core 20 from swinging and generating noise under the action of fluid pressure, simplifies the structure of the internal leakage valve core 100, and improves the movement stability of the valve core 20.

[0057] For example, the inner circumference of the limiter 40 may include a third guide surface, and the outer circumference of the valve core 20 may include a fourth guide surface, which is movably disposed inside the third guide surface along the axis of the pressure relief hole 11 .

[0058] In some further embodiments of the present invention, a stopper 40 is disposed between the valve seat 10 and the valve core 20, and the stopper 40 slidably cooperates with the valve seat 10 and the valve core 20 along the axis of the pressure relief hole 11. Specifically, when the pressure value in the system exceeds a safe value, the pressure in the system overcomes the elastic force of the first reset member 30 and acts on the valve core 20. The stopper 40 can guide the movement of the valve core 20, driving the valve core 20 to move along the axis of the pressure relief hole 11 to open and close the pressure relief hole 11, thereby preventing the valve core 20 from swinging under the action of fluid pressure. This simplifies the structure of the internal leakage valve core 100 and improves the movement stability of the valve core 20.

[0059] Combine Figure 2 and Figure 3 In some embodiments of the present invention, the valve core 20 includes a valve stem 21 and a valve disc 22. The valve disc 22 is positioned to the side of the pressure relief hole 11. The valve stem 21 is connected to the valve disc 22 and penetrates the pressure relief hole 11 and the valve seat 10. A stopper 40 cooperates with the valve stem 21 and the valve seat 10 to guide the movement of the valve core 20. Specifically, the valve stem 21 can drive the valve disc 22 to move, closing and opening the pressure relief hole 11 through the valve disc 22. The stopper 40 cooperates with the valve stem 21 to guide the valve stem 21 to move along the axis of the pressure relief hole 11, allowing the valve disc 22 to stably open and close the pressure relief hole 11. At the same time, the valve seat 10 cooperates with the stopper 40 to ensure that the stopper 40 can stably guide the movement of the valve stem 21.

[0060] Combined with attachment Figure 6 The arrow shows the pressure relief flow direction of the fluid in the safety valve in the related art. The entrance of the internal leakage channel is set at the top. When the fluid pressure in the system increases and reaches the internal leakage pressure value, the internal leakage fluid rushes straight through the internal leakage channel at high speed, which is easy to generate jet flow and cause noise.

[0061] Combine Figure 2and Figure 3 In some embodiments of the present invention, the valve seat 10 includes a cylinder 12 and an end plate 13. The end plate 13 covers one end of the cylinder 12. The pressure relief hole 11 is provided on the end plate 13. The peripheral wall of the cylinder 12 is provided with an internal leakage channel 122 that connects the internal space of the cylinder 12 and the pressure relief hole 11. After the valve core 20 opens the pressure relief hole 11, the system pressure can be discharged from the pressure relief hole 11 through the internal leakage channel 122. By providing the internal leakage channel 122 on the peripheral wall of the cylinder 12, the pressure relief flow direction of the fluid is optimized. By changing the water inlet direction of the internal leakage fluid, the pressure and flow rate of the internal leakage water are relieved, the flow-induced noise caused by the internal leakage discrete pressure is changed, and the noise of the safety valve 1000 during the pressure relief process is further reduced.

[0062] Combine Figure 5 As shown, the arrow shows the pressure relief flow direction of the fluid. When the pressure in the system exceeds the safety value, the fluid can enter the internal leakage channel 122 from the peripheral wall of the cylinder 12, optimizing the pressure relief flow direction of the fluid. By changing the water inlet direction of the internal leakage fluid, the pressure and flow rate of the internal leakage water are relieved, the flow-induced noise caused by the internal leakage discrete pressure is changed, and the noise of the safety valve 1000 during the pressure relief process is further reduced.

[0063] Combine Figure 2 Furthermore, the valve core 20 is provided through the cylinder 12, and the stopper 40 is provided at the other end of the cylinder 12, and blocks at least a portion of the other end of the cylinder 12. For example, the valve core 20 can be provided through the cylinder 12 from the lower end of the cylinder 12, so that the valve core 20 can close and open the pressure relief hole 11. The stopper 40 limits the valve core 20 from the upper end of the cylinder 12, which facilitates the installation of the internal leakage valve core 100 and facilitates the sealing of the upper end of the cylinder 12 by the stopper 40, so that the internal leakage fluid enters the internal leakage channel 122 from the peripheral wall of the cylinder 12, thereby optimizing the pressure relief flow direction of the fluid.

[0064] In some embodiments of the present invention, a plurality of internal leakage channels 122 are provided on the peripheral wall of the cylinder 12 . When the system pressure exceeds a safe value, pressure can be released from the plurality of internal leakage channels 122 , thereby improving the pressure relief efficiency of the internal leakage valve core 100 .

[0065] In combination with the above, optionally, in combination with Figure 3 The valve seat 10 includes a cylinder 12 and an end plate 13, the valve core 20 includes a valve stem 21 and a valve disc 22, and the internal leakage valve core 100 also includes a buffer 50, which is connected between the end plate 13 and the valve disc 22. When the valve core 20 closes the pressure relief hole 11, it avoids the noise caused by the collision between the valve disc 22 and the end plate 13, and can reduce the wear between the valve disc 22 and the end plate 13.

[0066] In addition, in the related art, a filter may be provided in the safety valve 1000, and the valve core 20 is weakly constrained by the filter fixing part through the hole during the axial movement of the valve core 20. When there is a circumferential vibration problem during the movement of the valve core 20, the valve core 20 rod vibrates and collides with the filter fixing part, causing vibration noise. By setting the aforementioned internal leakage valve core 100, the valve core 20 is guided to move along the axial direction of the pressure relief hole 11 through the limit part 40, which can avoid the valve core 20 from colliding with the filter fixing part during movement, thereby reducing the noise of the safety valve 1000 during the pressure relief process.

[0067] Combine Figure 4 and Figure 5 The present invention also provides a safety valve 1000, which includes a valve body 200 and the aforementioned internal leakage valve core 100. The valve body 200 has an internal leakage cavity 210 and a connecting port 220 and an internal leakage port 230 connected to the internal leakage cavity 210. The internal leakage valve core 100 is arranged in the internal leakage cavity 210 and is used to connect and separate the connecting port 220 and the internal leakage port 230. For example, the connecting port 220 can be connected to the inner tank of the water heater. When the pressure of the inner tank exceeds the safety value, the pressure of the fluid can drive the internal leakage valve core 100 to move, so that the connecting port 220 and the internal leakage port 230 are connected, so that the excess pressure of the inner tank can be discharged through the internal leakage port 230, thereby improving the safety of the use of the inner tank. When pressure relief is not required, the internal leakage valve core 100 can separate the connecting port 220 and the internal leakage port 230.

[0068] The safety valve 1000 also includes a second reset element 300, which has an elastic force that drives the internal leakage valve core 100 to close the internal leakage port 230. Specifically, when the system pressure does not exceed the safety value, that is, when the system pressure is normal, the second reset element 300 can drive the internal leakage valve core 100 to close the internal leakage port 230, and the safety valve 1000 can be in a closed and sealed state, preventing the medium in the system from escaping. When the system pressure exceeds the safety value, the system pressure overcomes the elastic force of the second reset element 300, driving the internal leakage valve core 100 to open the internal leakage port 230, thereby releasing the system pressure through the internal leakage port 230. For example, the second reset element 300 can be a spring.

[0069] Furthermore, the valve body 200 is provided with a drain port 240 communicating with the internal leakage chamber 210. The safety valve 1000 also includes a drain valve core 400 configured to open and close the drain port 240. When the drain valve core 400 opens the drain port 240, it releases system pressure to the outside of the system, thereby improving system operational stability. For example, the drain port 240 can be connected to an external drain pipe. When the system pressure exceeds a safe value, the excess pressure can be discharged through the drain port 240.

[0070] The present invention further provides a water heater comprising an inner tank and the aforementioned safety valve 1000. The inner tank has a water storage chamber and a water inlet connected to the water storage chamber, and the connecting port 220 is connected to the water inlet. By providing the aforementioned safety valve 1000, the noise generated by the water heater during the pressure relief process can be reduced.

[0071] The various embodiments / implementations of the present invention can be combined with each other without causing any contradiction.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0073] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0075] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An internal leakage valve core (100) of a safety valve, characterized in that: include: A valve seat (10), wherein the valve seat (10) is provided with a pressure relief hole (11); a valve core (20), the valve core (20) being movable along the axis of the pressure relief hole (11) to open and close the pressure relief hole (11); a first reset member (30), the first reset member (30) having an elastic force for driving the valve core (20) to close the pressure relief hole (11); A limiting member (40) is configured to guide the valve core (20) to move along the axis of the pressure relief hole (11).

2. The internal leakage valve core (100) according to claim 1, characterized in that: The limiting member (40) is connected to the valve core (20) and is slidably matched with the valve seat (10) along the axis of the pressure relief hole (11).

3. The internal leakage valve core (100) according to claim 2, characterized in that: The valve seat (10) includes a cylinder (12), the cylinder (12) extends along the axis of the pressure relief hole (11), the pressure relief hole (11) is provided on the inner side of one end of the cylinder (12), and the limiting member (40) is movably provided in the cylinder (12) along the axial direction.

4. The internal leakage valve core (100) according to claim 3, characterized in that: The inner circumference of the cylinder (12) includes a first guide surface (121), and the outer circumference of the position-limiting member (40) includes a second guide surface (41). The second guide surface (41) is movably arranged on the inner side of the first guide surface (121) along the axis of the pressure relief hole (11). Wherein, the first guide surface (121) is set as a non-circular cylinder, and the second guide surface (41) is set as a non-circular cylinder adapted to the first guide surface (121); or, the first guide surface (121) is set as a polygonal cylinder, and the second guide surface (41) is set as a polygonal cylinder adapted to the first guide surface (121); or, the gap between the first guide surface (121) and the second guide surface (41) is not greater than 1 mm; or, the first guide surface (121) is provided at the other end of the cylinder (12).

5. The internal leakage valve core (100) according to claim 3, characterized in that: The limiting member (40) includes a positioning protrusion (42), which is arranged on the outside of the cylinder (12), protrudes from the inner circumference of the cylinder (12) and is opposite to the other end of the cylinder (12) along the axial direction of the pressure relief hole (11).

6. The internal leakage valve core (100) according to claim 2, characterized in that: The limiting member (40) is threadedly connected to the valve core (20); and / or, the limiting member (40) is clearance-fitted with the valve seat (10); and / or, the limiting member (40) is key-connected to the valve seat (10).

7. The internal leakage valve core (100) according to claim 1, characterized in that: The limiting member (40) is connected to the valve seat (10), and the valve core (20) is slidably engaged with the limiting member (40) along the axis of the pressure relief hole (11); Alternatively, the limiting member (40) is provided between the valve seat (10) and the valve core (20), and the limiting member (40) is slidably matched with the valve seat (10) and the valve core (20) along the axis of the pressure relief hole (11).

8. The internal leakage valve core (100) according to any one of claims 1 to 7, characterized in that: The valve core (20) includes a valve stem (21) and a valve plate (22), wherein the valve plate (22) is arranged on the side of the pressure relief hole (11), the valve stem (21) is connected to the valve plate (22), and is passed through the pressure relief hole (11) and the valve seat (10), and the limiting member (40) cooperates with the valve stem (21) and the valve seat (10) to guide the movement of the valve core (20).

9. The internal leakage valve core (100) according to claim 1, characterized in that: The valve seat (10) includes a cylinder (12) and an end plate (13), wherein the end plate (13) covers one end of the cylinder (12), the pressure relief hole (11) is provided on the end plate (13), and the peripheral wall of the cylinder (12) is provided with an internal space communicating with the cylinder (12) and an internal leakage channel (122) of the pressure relief hole (11).

10. The internal leakage valve core (100) according to claim 9, characterized in that: The valve core (20) is inserted into the cylinder (12), and the stopper (40) is provided at the other end of the cylinder (12) and blocks at least a portion of the other end of the cylinder (12); And / or, a plurality of the internal leakage channels (122) are provided on the peripheral wall of the cylinder (12).

11. A safety valve (1000), characterized in that: include: A valve body (200), the valve body (200) having an internal leakage cavity (210), a connecting port (220) and an internal leakage port (230) communicating with the internal leakage cavity (210); The internal leakage valve core (100) according to any one of claims 1 to 10, wherein the internal leakage valve core (100) is provided in the internal leakage cavity (210) and is used to connect and separate the connection port (220) and the internal leakage port (230); A second reset member (300), wherein the second reset member (300) has an elastic force for driving the internal leakage valve core (100) to close the internal leakage port (230).

12. The safety valve (1000) according to claim 11, characterized in that The valve body (200) is further provided with an external leakage port (240) communicating with the internal leakage cavity (210), and the safety valve (1000) further comprises an external leakage valve core (400), wherein the external leakage valve core (400) is configured to open and close the external leakage port (240).

13. A water heater, characterized in that: include: An inner liner, the inner liner having a water storage cavity and a water inlet communicating with the water storage cavity; According to the safety valve (1000) according to any one of claims 11-12, the connecting port (220) is connected to the water inlet.

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