Safety valve and electric water heater
By setting an annular projection on the seal and setting it around the drain port, the problem of seal failure of the existing safety valve drain port and seal is solved, and higher corrosion resistance and service life are achieved.
Patent Information
- Application Number
- CN202421498922.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The sealing of the leak outlet and seal of the existing safety valve fails, resulting in the problem of leak failure and water leakage.
An annular protrusion is provided on the seal and arranged around the outer leakage port, so that the annular protrusion abuts the end face of the outer leakage port of the valve body, thereby closing the outer leakage port and transferring the weak points of corrosion to the seal.
It effectively improves the seal failure problem of the valve body leakage port and seal, improves the corrosion resistance and service life of the safety valve, and prevents leakage failure and water leakage.
Smart Images
Figure CN222702656U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to a safety valve and an electric water heater. Background Art
[0002] During the use of electric water heaters, the inner tank will be subjected to different pressures at different stages and under different conditions. In order to prevent fatigue damage or destruction of the inner tank due to long-term high pressure and ensure normal and safe use by users, a safety valve is usually installed at the water inlet pipe of the electric water heater. The safety valve has a rated external leakage pressure value. During use, the pressure in the inner tank continues to rise. When the pressure in the inner tank rises to the rated external leakage pressure value, the one-way safety valve leakage port opens, and the pressure is released by discharging part of the hot water in the inner tank of the water heater, thereby effectively reducing the pressure in the inner tank and protecting the inner tank.
[0003] In the related art, an R-port is provided at the leakage port of the valve body and is compressed and sealed with a seal. During long-term use, the R-port of the valve body will be repeatedly flushed by high-pressure and high-temperature water, which is prone to corrosion damage, resulting in failure of the seal between the leakage port of the valve body and the seal, thereby causing failure of the safety valve to leak. Utility Model Content
[0004] The main purpose of the utility model is to provide a safety valve and an electric water heater, aiming to improve the problem of sealing failure between the external leakage port of the valve body and the sealing member, so as to prevent the external leakage failure of the safety valve from leaking water.
[0005] In order to achieve the above-mentioned purpose, a safety valve proposed in the utility model comprises:
[0006] The valve body is provided with a liquid inlet cavity, a liquid outlet cavity and an external leakage cavity, the liquid inlet cavity is connected with the liquid outlet cavity, and the liquid outlet cavity is connected with the external leakage cavity through an external leakage port;
[0007] A valve core device, disposed in the liquid outlet cavity, for decompressing the liquid flowing from the liquid inlet cavity into the liquid outlet cavity;
[0008] A leakage device is arranged in the leakage cavity, and is used for allowing the liquid in the liquid outlet cavity with a pressure higher than a set pressure to flow into the leakage cavity, and the leakage device is provided with a sealing member;
[0009] Wherein, the sealing member is provided with an annular protrusion, the annular protrusion abuts against the end surface of the valve body provided with the external leakage port, and is arranged around the external leakage port.
[0010] In one embodiment of the present application, the annular protrusion and the sealing element are an integral structure.
[0011] In one embodiment of the present application, the annular protrusion is a silicone member or a rubber member.
[0012] In one embodiment of the present application, the end surface of the valve body abutting against the annular protrusion is a plane.
[0013] In one embodiment of the present application, the cross-section of the annular protrusion is one of a semicircular shape, a semi-elliptical shape, a triangle, and a rectangle.
[0014] In one embodiment of the present application, the radial width of the annular protrusion gradually decreases from a direction away from the liquid outlet cavity to a direction close to the liquid outlet cavity.
[0015] In one embodiment of the present application, the leakage device further includes:
[0016] A mounting seat connected to the inner wall of the leakage cavity;
[0017] The leakage valve core seat is arranged close to the leakage port, and the sealing member is arranged on a side of the leakage valve core seat close to the leakage port;
[0018] An external leakage elastic member is arranged between the external leakage valve core seat and the mounting seat;
[0019] The leakage valve core is penetrated by the leakage valve core seat, the leakage elastic member and the mounting seat.
[0020] In one embodiment of the present application, a groove is provided on one side of the leakage valve core seat close to the leakage port, the sealing member is arranged in the groove, and the annular protrusion at least partially protrudes from the end surface of one side of the leakage valve core seat close to the leakage port.
[0021] In one embodiment of the present application, the sealing surface of the sealing member provided with the annular protrusion is flush with an end surface of one side of the leakage valve core seat close to the leakage port.
[0022] To achieve the above objectives, the present application also provides an electric water heater, comprising an inner tank, a water inlet pipe connected to the inner tank, and a safety valve installed at the water inlet end of the water inlet pipe, wherein the safety valve is the above-mentioned safety valve, and the water inlet pipe is connected to the liquid inlet of the safety valve.
[0023] The technical solution of the utility model is to arrange an annular protrusion on the sealing member. When the liquid pressure in the liquid outlet chamber is lower than the set pressure, the annular protrusion abuts against the end face of the valve body provided with the leakage port, and is arranged around the leakage port to close the leakage port. In this way, the arrangement of the annular protrusion is equivalent to transferring the R port from the valve body to the sealing member, eliminating the need to arrange the R port on the valve body. Since the corrosion resistance of the sealing member is better than that of the copper valve body, the corrosion weak point can be transferred while the sealing method remains unchanged, thereby improving the corrosion resistance of the R port, thereby effectively improving the problem of sealing failure between the leakage port of the valve body and the sealing member, preventing the safety valve from leaking due to leakage, and effectively increasing the service life of the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0025] Figure 1 This is a structural schematic diagram of an embodiment of the safety valve of the utility model;
[0026] Figure 2 A bottom view of an embodiment of a safety valve of the utility model;
[0027] Figure 3 for Figure 2 Sectional view at AA in the middle;
[0028] Figure 4 for Figure 3 A local enlarged view of point A' in the middle.
[0029] Description of Figure Numbers:
[0030] Label name Label name 100 Safety valve 242 Valve core bowl 10 Valve body 25 Compression elastic parts 10a Liquid inlet cavity 26 Internal leakage elastic parts 10b Liquid outlet cavity 30 Leakage device 10c Leakage cavity 31 Seals 10d Leakage 311 Ring bulge 10e Connecting port 32 Mounting Seat 20 Valve core device 33 Leakage valve core seat 21 Valve core seat 331 Grooves 22 Fixed seat 34 Leaking elastic parts 23 Sealing ring 35 Leakage valve core 24 Valve core 36 Leakage handle 241 Valve stem
[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0034] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] During the use of electric water heaters, the inner tank will be subjected to different pressures at different stages and under different conditions. In order to prevent fatigue damage or destruction of the inner tank due to long-term high pressure and ensure normal and safe use by users, a safety valve is usually installed at the water inlet pipe of the electric water heater. The safety valve has a rated external leakage pressure value. During use, the pressure in the inner tank continues to rise. When the pressure in the inner tank rises to the rated external leakage pressure value, the one-way safety valve leakage port opens, and the pressure is released by discharging part of the hot water in the inner tank of the water heater, thereby effectively reducing the pressure in the inner tank and protecting the inner tank.
[0037] It should be noted that since the sealing surface of the existing seal and the valve body are in surface-to-surface contact, this will result in poor sealing between the seal and the valve body. Therefore, an R-port is set at the leakage port of the valve body to compress the seal with the seal to achieve surface-to-line contact, which can improve the sealing between the seal and the valve body. The R-port of the valve body will be repeatedly flushed by high-pressure and high-temperature water, which is prone to corrosion and damage, resulting in failure of the seal between the leakage port of the valve body and the seal, thereby causing leakage of the safety valve.
[0038] Based on this, see Figures 1 to 4 The utility model proposes a safety valve 100 including a valve body 10, a valve core device 20 and a leakage device 30; the valve body 10 is provided with a liquid inlet chamber 10a, a liquid outlet chamber 10b and a leakage chamber 10c, the liquid inlet chamber 10a is communicated with the liquid outlet chamber 10b, and the liquid outlet chamber 10b is communicated with the leakage chamber 10c through a leakage port 10d; the valve core device 20 is arranged in the liquid outlet chamber 10b, and is used to reduce the pressure of the liquid flowing from the liquid inlet chamber 10a into the liquid outlet chamber 10b; the leakage device 30 is arranged in the leakage chamber 10c, and is used to supply the liquid in the liquid outlet chamber 10b that is higher than the set pressure to flow into the leakage chamber 10c, and the leakage device 30 is provided with a sealing member 31, and the sealing member 31 is provided with an annular protrusion 311, and the annular protrusion 311 abuts against the end surface of the valve body 10 provided with the leakage port 10d, and is arranged around the leakage port 10d.
[0039] When the pressure in the inner tank rises to the rated leakage pressure value, the leakage opening condition is reached, the leakage port 10d of the one-way safety valve 100 is opened, and the seal 31 on the leakage device 30 moves away from the leakage port 10d under the action of water pressure to open the leakage port 10d. At this time, the liquid in the liquid outlet cavity 10b that is higher than the set pressure flows into the leakage cavity 10c from the leakage port 10d. In this process, the high-pressure and high-temperature liquid repeatedly flushes the annular protrusion 311 on the seal 31. Since the corrosion resistance of the annular protrusion 311 set on the seal 31 is better than the corrosion resistance of the copper valve body 10, the corrosion resistance of the R port is improved, so that the problem of sealing failure between the leakage port 10d of the valve body 10 and the seal 31 can be effectively improved to prevent the safety valve 100 from leaking due to leakage failure.
[0040] In this embodiment, the liquid inlet chamber 10a and the liquid outlet chamber 10b are arranged sequentially in a first direction (Y direction, which is the direction in which water flows in the valve body 10 when the water inlet pipe delivers water into the electric water heater), and the leakage chamber 10c is located on one side of the liquid outlet chamber 10b along the X direction (a direction perpendicular to the Y direction), and is connected to the liquid outlet chamber 10b through the leakage port 10d.
[0041] The safety valve 100 is connected to the external water inlet pipe through the liquid inlet, and the water pressure at the liquid inlet of the valve body 10 is substantially equal to the water pressure in the water inlet pipe; the safety valve 100 is connected to the connecting pipe of the water heater through the liquid outlet, and the water pressure in the liquid outlet cavity 10b of the valve body 10 is substantially equal to the water pressure in the inner tank of the water heater; the leakage cavity 10c is connected to the outside of the safety valve 100 through the leakage outlet, and the pressure in the leakage cavity 10c is substantially the same as the atmospheric pressure.
[0042] In practical applications, the annular protrusion 311 can be an integrally formed structure with the sealing member 31 , or can be a separately assembled structure with the sealing member 31 .
[0043] The material of the annular protrusion 311 is the same as that of the sealing member 31 , and may specifically be silicone, rubber, or other materials with sealing and high corrosion resistance.
[0044] The cross-sectional shape of the annular protrusion 311 may be circular, semicircular, elliptical, semi-elliptical, triangular, rectangular, or the like.
[0045] In practical application, the end surface of the valve body 10 abutting against the annular protrusion 311 may be a plane, or the end surface of the valve body 10 abutting against the annular protrusion 311 may be provided with a recess so that the recess matches the annular protrusion 311 .
[0046] In summary, the technical solution of the utility model is to set an annular protrusion 311 on the sealing member 31. When the liquid pressure in the liquid outlet chamber 10b is lower than the set pressure, the annular protrusion 311 abuts against the end face of the valve body 10 provided with the leakage port 10d, and is arranged around the leakage port 10d to close the leakage port 10d. In this way, the setting of the annular protrusion 311 is equivalent to transferring the R port from the valve body 10 to the sealing member 31, thereby eliminating the need to set the R port on the valve body 10. Since the corrosion resistance of the sealing member 31 is better than that of the copper valve body 10, the corrosion weak point can be transferred without changing the sealing method, thereby improving the corrosion resistance of the R port, thereby effectively improving the problem of sealing failure between the leakage port 10d of the valve body 10 and the sealing member 31, thereby preventing leakage of the safety valve 100 due to leakage failure, and effectively improving the service life of the safety valve 100.
[0047] As some examples, the valve core device 20 may include a fixed seat 22, a valve core seat 21, a sealing ring 23, a valve core 24, a clamping elastic member 25 and an internal leakage elastic member 26; the valve core seat 21 is provided with a first mounting hole extending along its axial direction, the fixed seat 22 is provided with a second mounting hole extending along its axial direction, and the valve core 24 includes a valve core rod 241 and a valve core bowl seat 242; the sealing ring 23 is installed on the valve core seat 21, and the valve core rod 241 passes through the sealing ring 23 and the first mounting hole of the valve core seat 21 in turn, and the sealing ring 23 is located between the valve core bowl seat 242 and the valve core The inner leakage elastic member 26 is sleeved on the circumferential surface of the valve core rod 241, one end of which is clamped in the clamping groove on the circumferential surface of the valve core rod 241, and the other end is abutted against the side surface of the valve core seat 21, so that the inner leakage elastic member 26 can apply a force to the valve core seat 21 away from the liquid inlet chamber 10a, so that the valve core 24 can move relative to the valve core seat 21 along the direction away from the liquid inlet chamber 10a to the position where the valve core bowl seat 242 and the sealing ring 23 abut; thereafter, the valve core 24 passes through the clamping elastic member 25 and the second mounting hole of the fixed seat 22 in turn.
[0048] After the valve core device 20 is installed in the liquid outlet chamber 10b, it can be fixedly connected by the external thread on the circumferential outer surface of the fixing seat 22 and the internal thread on the inner wall of the liquid outlet chamber 10b. One end of the clamping elastic member 25 abuts against the valve core seat 21, and the other end abuts against the fixing seat 22, so that the clamping elastic member 25 can apply a force to the valve core seat 21 toward the liquid inlet chamber 10a, so that the sealing ring 23 installed on the valve core seat 21 abuts against the inner wall of the liquid outlet chamber 10b to close the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b.
[0049] When the water pressure in the liquid inlet chamber 10a is less than the water pressure in the liquid outlet chamber 10b, or when the water pressure in the liquid inlet chamber 10a is greater than the water pressure in the liquid outlet chamber 10b, but the combined force of the force exerted by the water in the liquid outlet chamber 10b on the valve core 24 and the valve core seat 21, and the force exerted by the clamping elastic member 25 on the valve core seat 21, is less than the combined force of the force exerted by the water pressure in the liquid inlet chamber 10a on the valve core bowl seat 242 and the sealing ring 23, the sealing ring 23, under the action of the water pressure in the liquid outlet chamber 10b and the clamping elastic member 25, maintains contact with the inner wall of the liquid outlet chamber 10b in a direction close to the liquid inlet chamber 10a to close the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b. At this time, the water in the liquid inlet chamber 10a cannot flow into the liquid outlet chamber 10b, that is, the water in the liquid inlet pipe cannot flow into the inner tank of the water heater.
[0050] When the water pressure in the liquid inlet chamber 10a is greater than the water pressure in the liquid outlet chamber 10b, and the combined force of the force exerted by the water in the liquid outlet chamber 10b on the valve core 24 and the valve core seat 21, and the force exerted by the clamping elastic member 25 on the valve core seat 21, is greater than the combined force of the force exerted by the water in the liquid inlet chamber 10a on the valve core bowl seat 242 and the sealing ring 23, the sealing ring 23 moves relative to the valve body 10 away from the liquid inlet chamber 10a under the action of the water pressure in the liquid inlet chamber 10a to open the connecting port 10e between the liquid inlet chamber 10a and the liquid outlet chamber 10b, so that the water in the liquid inlet chamber 10a can flow into the liquid outlet chamber 10b. During this process, the sealing ring 23 and the valve core 24, under the elastic force of the clamping elastic member 25, will reduce the pressure of the water flowing through the gap between the connecting port 10e and the sealing ring 23, so that after the water flows from the liquid inlet chamber 10a to the liquid outlet chamber 10b, the water pressure will be reduced by a certain value. The size of this value is determined by the size of the elastic force applied by the clamping elastic member 25 to the valve core seat 21. The greater the elastic force applied by the clamping elastic member 25 to the valve core seat 21, the greater the value of the water pressure reduction in the process of the water in the liquid inlet chamber 10a flowing to the liquid outlet chamber 10b, and vice versa.
[0051] Exemplarily, both the compression elastic member 25 and the internal leakage elastic member 26 may be springs.
[0052] In one embodiment of the present application, please refer to Figure 3 , Figure 4 The annular protrusion 311 and the sealing member 31 are an integral structure. It can be understood that by making the annular protrusion 311 and the sealing member 31 an integrally formed structure, not only can the connection reliability between the annular protrusion 311 and the sealing member 31 be ensured, but also the preparation process can be simplified.
[0053] In this embodiment, the sealing member 31 having the annular protrusion 311 may be integrally formed by injection molding using a mold.
[0054] In one embodiment of the present application, please refer to Figure 3 , Figure 4 The annular protrusion 311 is a silicone member or a rubber member.
[0055] It can be understood that since the material of the sealing member 31 is usually a silicone member or a rubber member, the annular protrusion 311 is also made of a silicone member or a rubber member so that the material of the annular protrusion 311 is the same as the material of the sealing member 31. In this way, the annular protrusion 311 can have better corrosion resistance while ensuring the sealing effect of the annular protrusion 311 on the leakage port 10d when it abuts against the valve body 10, thereby ensuring the sealing effect between the leakage port 10d of the valve body 10 and the sealing member 31.
[0056] In one embodiment of the present application, please refer to Figure 3 , Figure 4 The end surface of the valve body 10 that abuts against the annular protrusion 311 is a plane.
[0057] In this embodiment, when the liquid pressure in the liquid outlet chamber 10b is lower than the set pressure, the annular protrusion 311 abuts against the end face of the valve body 10. Since the end face of the valve body 10 is a plane, the annular protrusion 311 can abut against the plane, thereby achieving surface-to-line sealing contact.
[0058] It can be understood that when the pressure in the inner tank rises to the rated leakage pressure value to meet the leakage opening condition, the liquid in the liquid outlet chamber 10b that is higher than the set pressure flows into the leakage chamber 10c from the leakage port 10d. In this process, the high-pressure and high-temperature liquid repeatedly flushes the annular protrusion 311 on the sealing member 31. Since the end surface of the valve body 10 abutting the annular protrusion 311 is a flat design, only a part of the high-pressure and high-temperature liquid flows out along the end surface of the valve body 10 abutting the annular protrusion 311 when flowing out of the leakage port 10d. There will be no high-pressure and high-temperature liquid flushing the valve body 10, thereby improving the problem of easy corrosion of the valve body 10.
[0059] In one embodiment of the present application, please refer to Figure 3 , Figure 4 The cross-section of the annular protrusion 311 is one of a semicircular, semi-elliptical, triangular, and rectangular shape. When the annular protrusion 311 abuts against the end face of the valve body 10 provided with the external leakage port 10d, the annular protrusion 311 is squeezed between the valve body 10 and the sealing member 31, and the deformation of the annular protrusion 311 can achieve a better sealing effect.
[0060] In one embodiment of the present application, please refer to Figure 3 , Figure 4 , the radial width of the annular protrusion 311 gradually decreases from the direction away from the liquid outlet cavity 10b to the direction close to the liquid outlet cavity 10b.
[0061] It can be understood that when the annular protrusion 311 abuts against the end surface of the valve body 10 provided with the external leakage port 10d, the annular protrusion 311 is squeezed between the valve body 10 and the sealing member 31, so that the annular protrusion 311 can be better deformed to achieve a better sealing effect.
[0062] In one embodiment of the present application, please refer to Figure 3 The leakage device 30 also includes a mounting seat 32, a leakage valve core seat 33, a leakage elastic member 34 and a leakage valve core 35. The mounting seat 32 is connected to the inner wall of the leakage cavity 10c; the leakage valve core seat 33 is arranged close to the leakage port 10d, and the sealing member 31 is arranged on the side of the leakage valve core seat 33 close to the leakage port 10d; the leakage elastic member 34 is arranged between the leakage valve core seat 33 and the mounting seat 32; the leakage valve core 35 is penetrated by the leakage valve core seat 33, the leakage elastic member 34 and the mounting seat 32.
[0063] It can be understood that the leakage elastic member 34 can apply a force toward the liquid outlet chamber 10b to the leakage valve core seat 33, the leakage valve core 35 and the sealing member 31, so that under the action of the leakage elastic member 34, the annular protrusion 311 on the sealing member 31 abuts against the end face of the valve body 10 provided with the leakage port 10d to close the leakage port 10d.
[0064] In this embodiment, the surface of the valve body 10 is provided with a mounting port communicating with the leakage chamber 10c, so that the leakage device 30 can be smoothly installed in the leakage chamber 10c. The mounting seat 32 is used to support other components of the leakage device 30, and the mounting seat 32 can be fixedly connected to the inner wall of the leakage chamber 10c by means of threads, buckles, bonding, etc.
[0065] It should be noted that when the water pressure in the liquid outlet chamber 10b of the valve body 10 exceeds the water pressure in the inner tank and reaches the set protection pressure, but due to the high water pressure in the liquid inlet pipe, the water in the inner tank cannot flow into the liquid inlet chamber 10a by internal leakage to reduce the water pressure in the inner tank, the water in the liquid outlet chamber 10b can push the seal 31 of the leakage device 30 to move in a direction away from the liquid outlet chamber 10b to open the leakage port 10d, so that the water in the liquid outlet chamber 10b flows into the leakage chamber 10c through the leakage port 10d, and flows to the outside of the valve body 10 through the leakage port to reduce the water pressure in the inner tank.
[0066] As some examples, the leakage device 30 also includes a leakage handle 36, which is hinged to one end of the leakage valve core 35 away from the liquid outlet chamber 10b. The leakage handle 36 can be rotated to pull the leakage valve core 35, the leakage valve core seat 33 and the sealing member 31 to move in a direction away from the liquid outlet chamber 10b to open the leakage port 10d, so that the water in the liquid outlet chamber 10b flows into the leakage chamber 10c through the leakage port 10d, and flows to the outside of the valve body 10 through the leakage port to reduce the water pressure in the inner tank.
[0067] Exemplarily, the leakage elastic member 34 may be a spring.
[0068] In one embodiment of the present application, please refer to Figure 4 A groove 331 is provided on one side of the leakage valve core seat 33 close to the leakage port 10d, the sealing member 31 is arranged in the groove 331, and the annular protrusion 311 at least partially protrudes from the end surface of one side of the leakage valve core seat 33 close to the leakage port 10d.
[0069] It can be understood that by installing the sealing ring 23 in the groove 331 of the leakage valve core seat 33, the installation reliability of the seal 31 can be improved, thereby improving the sealing effect between the valve body 10 and the seal 31; at the same time, by making the annular protrusion 311 at least partially protrude from the end surface of one side of the leakage valve core seat 33 close to the leakage port 10d, when the leakage opening condition is reached, the annular protrusion 311 can smoothly abut against the end surface of the valve body 10 to close the leakage port 10d.
[0070] In practical applications, the sealing member 31 can be installed in the groove 331 of the leakage valve core seat 33 by means of interference fit, or can be fixed in the groove 331 of the leakage valve core seat 33 by means of bonding or the like.
[0071] In one embodiment of the present application, please refer to Figure 4 The sealing surface of the sealing member 31 provided with the annular protrusion 311 is flush with the end surface of one side of the leakage valve core seat 33 close to the leakage port 10d. Such an arrangement not only allows the sealing member 31 to be fully installed in the groove 331 of the leakage valve core seat 33 to improve the installation reliability of the sealing member 31, but also allows the annular protrusion 311 to completely protrude from the end surface of the leakage valve core seat 33, and the leakage port 10d can be better sealed under the action of the annular protrusion 311 and the sealing member 31, so as to further improve the sealing effect between the valve body 10 and the sealing member 31.
[0072] The utility model also provides an electric water heater, which includes an inner tank, a water inlet pipe connected to the inner tank, and a safety valve 100 installed at the water inlet end of the water inlet pipe. The specific structure of the safety valve 100 refers to the above embodiment. Since the electric water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water inlet pipe is connected to the liquid inlet of the safety valve 100.
[0073] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A safety valve, characterized in that: include: The valve body is provided with a liquid inlet cavity, a liquid outlet cavity and an external leakage cavity, the liquid inlet cavity is connected with the liquid outlet cavity, and the liquid outlet cavity is connected with the external leakage cavity through an external leakage port; A valve core device, disposed in the liquid outlet cavity, for decompressing the liquid flowing from the liquid inlet cavity into the liquid outlet cavity; A leakage device is arranged in the leakage cavity, and is used for allowing the liquid in the liquid outlet cavity with a pressure higher than a set pressure to flow into the leakage cavity, and the leakage device is provided with a sealing member; Wherein, the sealing member is provided with an annular protrusion, the annular protrusion abuts against the end surface of the valve body provided with the external leakage port, and is arranged around the external leakage port.
2. The safety valve according to claim 1, characterized in that: The annular protrusion and the sealing element are an integral structure.
3. The safety valve according to claim 2, characterized in that: The annular protrusion is a silicone piece or a rubber piece.
4. The safety valve according to any one of claims 1 to 3, characterized in that: The end surface of the valve body abutting against the annular protrusion is a plane.
5. The safety valve according to any one of claims 1 to 3, characterized in that: The cross section of the annular protrusion is one of a semicircle, a semi-ellipse, a triangle and a rectangle.
6. The safety valve according to claim 5, characterized in that: The radial width of the annular protrusion gradually decreases from a direction away from the liquid outlet cavity to a direction close to the liquid outlet cavity.
7. The safety valve according to any one of claims 1 to 3, characterized in that: The leakage device also includes: A mounting seat connected to the inner wall of the leakage cavity; The leakage valve core seat is arranged close to the leakage port, and the sealing member is arranged on a side of the leakage valve core seat close to the leakage port; An external leakage elastic member is arranged between the external leakage valve core seat and the mounting seat; The leakage valve core is penetrated by the leakage valve core seat, the leakage elastic member and the mounting seat.
8. The safety valve according to claim 7, characterized in that: A groove is provided on one side of the leakage valve core seat close to the leakage port, the sealing member is arranged in the groove, and the annular protrusion at least partially protrudes from an end surface of one side of the leakage valve core seat close to the leakage port.
9. The safety valve according to claim 8, characterized in that The sealing surface of the sealing member provided with the annular protrusion is flush with an end surface of one side of the leakage valve core seat close to the leakage port.
10. An electric water heater, comprising an inner tank, a water inlet pipe connected to the inner tank, and a safety valve installed at the water inlet end of the water inlet pipe, characterized in that: The safety valve is the safety valve according to any one of claims 1 to 9, and the water inlet pipe is connected to the liquid inlet of the safety valve.