CN212080277U - Modular safety valve for water heater - Google Patents

Abstract

The utility model discloses a modular relief valve for water heater, in it let out the valve casing and in let out the valve bottom including letting out the valve module installation, in let out the valve casing and in let out the valve bottom install in the first cavity of shell, and will let out the valve module installation in the valve casing that lets out, the inside spiro union of second cavity is installed and is let out the valve casing and compress tightly the lid, and the valve casing that lets out is installed in the second cavity. The utility model discloses a modular relief valve for water heater when need maintain the valve module that leaks or interior valve module that leaks, can conveniently carry out the dismouting replacement with leaking the valve shell together with leaking the valve module, or can conveniently carry out the dismouting replacement with interior valve shell together with interior valve module that leaks, compare prior art, the utility model discloses a maintenance simple and convenient for the modular relief valve of water heater. Through set up sealed the pad in the interface, make the utility model discloses a water inlet tube sealing connection more reliably for modular relief valve of water heater and water heater.

Description

Modular safety valve for water heater

Technical Field

The utility model relates to a water intaking valve field for water heater, concretely relates to modular relief valve for water heater.

Background

The water inlet valve of the existing water storage type electric water heater generally has the functions of internal pressure relief and external pressure relief, which can prevent the internal pressure of a water storage barrel of the water storage type electric water heater from being too high, so the water inlet valve is also called as a safety valve. The safety valve is arranged at the water inlet of the water storage type electric water heater, the safety valve for the water storage type electric water heater plays a role of a one-way valve firstly, but when the internal pressure of the water storage type electric water heater is overhigh due to high-temperature heating, the internal pressure of the electric water heater can be internally discharged to a tap water inlet pipe through an internal discharge valve component of the safety valve, and under the condition that the internal pressure of the electric water heater is extremely high, when the internal pressure cannot be balanced in an internal discharge mode, high-pressure water of the electric water heater can be discharged to the outside of the electric.

The safety valve for the existing water storage type electric water heater is provided with a copper shell, parts of an inner leakage valve component and an outer leakage valve component are respectively and directly installed in the shell, when the inner leakage valve component or the outer leakage valve component needs to be maintained and replaced, the parts of the inner leakage valve component or the outer leakage valve component need to be disassembled, the parts are inconvenient to install again, certain technical difficulty exists, the operation of common people is not facilitated, and therefore the safety valve of the existing water storage type electric water heater needs to be improved.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide a modular relief valve for water heater, it is favorable to making the maintenance of relief valve simple and convenient.

The purpose of the utility model is realized by the following technical scheme.

The utility model discloses a modular relief valve for water heater, including the shell, be formed with first cavity, second cavity and inside and outside leakage water channel in the shell, first cavity with the second cavity passes through inside and outside leakage water channel intercommunication, be equipped with interior valve subassembly in the first cavity, be equipped with the valve subassembly that leaks in the second cavity, the shell is in the downside spiro union of first cavity is installed water inlet valve seat, the shell is in the right side spiro union of second cavity is installed sealed lid, the shell is formed with the drain pipe in the middle part position corresponding the second cavity, wherein, including interior valve shell, the lower extreme of interior valve shell is connected with interior valve bottom cover that leaks, interior valve subassembly is installed in the cavity that interior valve shell and interior valve bottom cover enclose, interior valve shell reaches interior valve bottom cover that leaks is installed in the first cavity, the pressure-reducing valve further comprises an outer leakage valve shell, the outer leakage valve component is installed in the outer leakage valve shell, an outer leakage valve shell pressing cover is installed inside the second cavity in a threaded mode, the outer shell of the leakage valve is arranged in the second cavity, the left end surface of the compression cover of the outer shell of the leakage valve is connected with the right end surface of the outer shell of the leakage valve in an abutting mode, the pressure cover of the leakage valve casing is arranged between the sealing cover and the outer casing of the leakage valve, an interface is formed on the outer casing above the first cavity, the interface is provided with an internal thread for connecting with a water inlet pipe of a water heater, the bottom of the interface is provided with a circular boss, a water inlet hole is formed in the center of the circular boss, the interface is communicated with the first cavity through the water inlet hole, the outside adaptation cover of round boss is equipped with sealed the pad, sealed outer edge portion with the inner wall interference fit of interface.

Preferably, a filter screen is installed at the inner lower end part of the water inlet valve seat.

Preferably, the upper end portion in the internal leakage valve shell is provided with a water inlet pagoda spring support, and the water inlet pagoda spring support and the internal leakage valve shell are integrally arranged.

Preferably, the lower end of the internal leakage valve shell is provided with a curved notch, the upper end of the internal leakage valve bottom cover is provided with a rotary buckling lug, and the rotary buckling lug is buckled with the curved notch.

Preferably, a hexagonal end plug is formed at the left end of the outer shell of the external leakage valve, an inner hexagonal concave platform is formed inside the outer shell, the internal and external leakage water channel penetrates through the middle part of the inner hexagonal concave platform, and the hexagonal end plug is inserted into the inner hexagonal concave platform in a matching manner.

Preferably, a leak-proof sealing gasket is arranged between the left outer end face of the outer leakage valve shell and the left inner end face of the second cavity.

Compared with the prior art, the utility model, its beneficial effect is: through in leaking the valve module installation including leaking the valve housing and leaking the valve bottom in, in leaking the valve housing and leaking the valve bottom and installing in the first cavity of shell, and will leak the valve module and install in leaking the valve housing, the inside spiro union of second cavity is installed and is leaked the valve housing and compress tightly the lid, leaks the valve housing and install in the second cavity, makes the utility model discloses an interior valve module that leaks and leak the valve module and become modular structure to when needing to maintain the valve module that leaks or leak the valve module in, can conveniently carry out the dismouting replacement with leaking the valve housing together with leaking the valve module, or can conveniently carry out the dismouting replacement with interior valve module that leaks with interior valve housing, compare prior art, the utility model discloses a maintenance of relief valve is simple and convenient.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a schematic sectional structural view of the housing of the present invention.

Fig. 3 is a schematic top view of the housing according to the present invention.

Fig. 4 is a schematic sectional view of the combination of the internal relief valve casing, the internal relief valve bottom cover and the internal relief valve assembly of the present invention.

Fig. 5 is a schematic view of the external structure of the combination of the internal leakage valve casing and the internal leakage valve bottom cover of the present invention.

Fig. 6 is a schematic view of the external structure of the internal relief valve casing according to the present invention.

Fig. 7 is a schematic structural view of the internal leakage valve bottom cover of the present invention.

Fig. 8 is a schematic top view of the bottom cap of the internal relief valve according to fig. 7.

Fig. 9 is a schematic sectional view of the combination of the leakage valve assembly and the leakage valve housing according to the present invention.

Fig. 10 is a schematic bottom view of the outer casing of the leakage valve according to the present invention.

Fig. 11 is a left side view schematic diagram of the leakage valve casing according to fig. 10.

Description of reference numerals: 2-internal relief valve assembly; 201-internal leakage valve shell; 2011-hollow holes for water; 2012-gap of curve; 2013-a water inlet pagoda spring support; 202-internal relief valve bottom cap; 2021-turning on the convex block; 203-inlet valve pagoda spring; 204-internal relief valve pagoda spring; 205-internal leakage valve sealing rod; 206-water inlet gasket; 3-an external bleed valve assembly; 301-leak valve housing; 3011-out of the hollowed-out hole; 3012-hexagonal end plug; 3013-outer drain boss; 302-leak gaskets; 303-leakage spring; 304-leak valve stem; 305-leak spring adjustment cap; 4-a housing; 401 — a first cavity; 402-a second cavity; 403-interface; 404-round boss; 405-a water inlet hole; 406-hexagonal socket; 8-inlet valve seat; 9-a filter screen; 10-an external leakage valve shell pressing cover; 11-a sealing cover; 12-an escape handle; 13-leak-proof sealing gaskets; 14-an external drainage pipe; 15-internal and external drainage water channel; 16-sealing gasket.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The modular safety valve for a water heater of the present embodiment, as shown in fig. 1, includes a housing 4, as shown in fig. 2 and 3, a first cavity 401, a second cavity 402 and an internal and external leakage water channel 15 are formed in the housing 4, a central axis of the first cavity 401 is vertically disposed, a central axis of the second cavity 402 is horizontally disposed, and the first cavity 401 and the second cavity 402 are communicated through the internal and external leakage water channel 15. As shown in fig. 1, an internal leakage valve assembly 2 is arranged in the first cavity 401, an external leakage valve assembly 3 is arranged in the second cavity 402, a water inlet valve seat 8 is screwed on the lower side of the first cavity 401 of the housing 4, a corresponding sealing ring is arranged between the water inlet valve seat 8 and the housing 4, and a boss for cooperating with the water inlet sealing gasket 206 is arranged at the upper end of the water inlet valve seat 8. The casing 4 is screw-coupled with a sealing cover 11 at the right side of the second chamber 402, and the casing 4 is formed with an external drainage pipe 14 at a middle position corresponding to the second chamber 402. As shown in fig. 4, the internal relief valve assembly 2 mainly includes an inlet valve pagoda spring 203, an internal relief valve pagoda spring 204, an internal relief valve sealing rod 205 and an inlet sealing gasket 206, as shown in fig. 1, the inlet sealing gasket 206 is pressed on a boss at the upper end of the inlet valve seat 8 by the elastic force of the inlet valve pagoda spring 203, so as to realize the function of a one-way valve, the lower end of the internal relief valve sealing rod 205 is pressed on the lower end surface of the inlet sealing gasket 206 by the elastic force of the internal relief valve pagoda spring 204, and the inlet valve pagoda spring 203 is sleeved outside the internal relief valve pagoda spring 204. As shown in fig. 9, the leakage valve assembly 3 mainly includes a leakage sealing gasket 302, a leakage spring 303, a leakage valve sealing rod 304, and a leakage spring adjusting cover 305, wherein the leakage sealing gasket 302 seals the leakage passage by the elastic force of the leakage spring 303, and the leakage spring adjusting cover 305 is used for adjusting the elastic force applied by the leakage spring 303 to the leakage sealing gasket 302, so as to adjust the water pressure required for opening the leakage sealing gasket 302. The leakage valve sealing rod 304 is used for connecting the leakage handle 12, and the leakage handle 12 is used for realizing active external pressure relief by swinging the leakage handle 12 by human hands. The above description of the structure and function of the internal and external bleed valve assemblies 2 and 3 is prior art.

The utility model discloses a functional principle brief explanation of relief valve is as follows: the tap water pipe is connected with the external thread at the lower end of the shell 4, the interface 403 at the upper end of the shell 4 is connected with the water inlet pipe of the water storage type electric water heater, the water pressure of the tap water is applied to the lower end surface of the water inlet sealing gasket 206 to push the water inlet sealing gasket 206 to move upwards, the water inlet valve pagoda spring 203 is compressed by the thrust of the water pressure, and then the tap water flows through the outer edge of the water inlet sealing gasket 206 and then enters the interior of the water storage barrel of the water storage type electric water heater. When the tap water pipe is closed, the water inlet sealing pad 206 is reset by the elastic force of the water inlet valve pagoda spring 203 to close the water inlet at the upper end of the water inlet valve seat 8. When the water pressure in the water storage type electric water heater rises due to heating, the pressure of the water in the water storage type electric water heater pushes the internal relief valve sealing rod 205 to move downwards, so that the internal relief valve pagoda spring 204 is compressed, the lower end part of the internal relief valve sealing rod 205 leaves the lower end surface of the water inlet sealing gasket 206, and the pressure of the water in the water storage type electric water heater can be released to a tap water pipe, so that the internal relief function is realized; as shown in fig. 1, the water inside the water storage type electric water heater is simultaneously contacted with the left end face of the external leakage sealing gasket 302 of the external leakage valve component 3 through the internal and external leakage water channel 15, when the pressure of the water inside the water storage type electric water heater is higher and cannot be balanced through internal pressure relief, the water pressure pushes the external leakage sealing gasket 302 to move rightwards and open, so that the external leakage spring 303 is compressed, and high-pressure water is discharged to the outside from the external leakage drain pipe 14, thus realizing the external pressure relief function. When manual pressure relief is required, as shown in fig. 1, the leakage handle 12 is swung upward, the leakage handle 12 pulls the leakage valve sealing rod 304 to move rightward, and the leakage valve sealing rod 304 compresses the leakage spring 303, so that the leakage sealing gasket 302 is opened to release pressure.

The safety valve of the present embodiment further includes an inner leakage valve housing 201, the lower end of the inner leakage valve housing 201 is connected with an inner leakage valve bottom cover 202, the outer shape of the inner leakage valve bottom cover 202 is as shown in fig. 7 and 8, as shown in fig. 5, the upper portion of the inner leakage valve bottom cover 202 is connected with the lower inner portion of the inner leakage valve housing 201 in a matching manner, as shown in fig. 4, the inner leakage valve assembly 2 is installed in a cavity surrounded by the inner leakage valve housing 201 and the inner leakage valve bottom cover 202, and the diameter of the middle through hole of the inner leakage valve bottom cover 202 is smaller than the outer diameter of the water inlet gasket 206, so the inner leakage valve bottom cover 202 is installed on the inner leakage valve housing 201 after the inner leakage valve assembly 2 is first assembled in the inner leakage valve housing 201, as shown in fig. 4 and 6, the inner leakage valve housing 201 is provided with a square water through hollow hole 2011, and the position of the water through hollow hole corresponds to the inner leakage. As shown in FIG. 1, the internal leakage valve housing 201 and the internal leakage valve bottom cover 202 are installed in the first cavity 401, the internal leakage valve housing 201 is in clearance fit with the inner wall of the first cavity 401, and the edge of the through hole in the middle of the internal leakage valve bottom cover 202 does not interfere with the water inlet boss on the upper end of the water inlet valve seat 8. The inlet valve seat 8 is pressed on the lower end surface of the inner discharge valve bottom cover 202 by the thread locking force. As shown in fig. 9, the external leakage valve assembly 3 is installed in the external leakage valve housing 301, as shown in fig. 1, an external leakage valve housing hold-down cover 10 is installed inside the second cavity 402 in a threaded manner, the external leakage valve housing 301 is installed in the second cavity 402, the left end face of the external leakage valve housing hold-down cover 10 is connected with the right end face of the external leakage valve housing 301 in an abutting manner, and the external leakage valve housing hold-down cover 10 is disposed between the seal cover 11 and the external leakage valve housing 301. As shown in fig. 9 and 10, the leakage valve housing 301 is formed with a leakage through hole 3011 for the passage of the leakage discharge water, and the leakage through hole 3011 corresponds to the position of the leakage discharge pipe 14. As shown in fig. 9, an external leakage boss 3013 cooperating with the external leakage sealing gasket 302 is formed inside the left end of the external leakage valve casing 301, and in the prior art, the external leakage boss 3013 is arranged inside the casing 4, and the external appearance of the casing 4 is complex and is not convenient for clamping during processing, so that the processing and manufacturing are difficult. The prior art leakage spring adjustment cap 305 is directly screwed with the housing 4, so that when maintenance is required to replace the leakage packing 302, after the leakage valve assembly 3 is reassembled, the ordinary personnel can not adjust the pressure to the original set value of the leakage pressure, the utility model assembles the leakage valve component 3 in the outer shell 301 of the leakage valve, therefore, when maintenance is needed, the outer leakage valve casing 301 and the outer leakage valve assembly 3 can be taken out and replaced only by disassembling the sealing cover 11 and the outer leakage valve casing pressing cover 10, the external member consisting of the outer leakage valve assembly 3 and the outer leakage valve casing 301 of the utility model is beneficial to pre-adjusting the set leakage pressure value during production and assembly, in particular to rotating the outer leakage spring adjusting cover 305, so that the compression degree of the outer leakage spring 303 is changed, thereby adjust the pressure value of leaking, compare prior art, be convenient for maintain and be favorable to keeping the stability of leaking the pressure value. Similarly, when the internal relief valve assembly 2 needs to be maintained and replaced, the internal relief valve housing 201 and the internal relief valve assembly 2 can be taken out and replaced only by detaching the water inlet valve seat 8, the process is simple, and the maintenance quality is easy to ensure. Through in letting out valve module 2 installation in letting out valve housing 201 and in letting out valve bottom 202, in letting out valve housing 201 and in letting out valve bottom 202 and installing in first cavity 401 of shell 4, and will let out valve module 3 and install in leaking valve housing 301, let out valve housing 301 and install in second cavity 401, make the utility model discloses an in let out valve module 2 and the subassembly 3 that leaks become modular structure, be convenient for in the production assembling process, in a flexible way with the different pressure release setting values in let out valve module 2 and the subassembly 3 that leaks and make up the assembly to adapt to different customers' demands.

As shown in fig. 2 and 3, the housing 4 is formed with an interface 403 above the first cavity 401, the interface 403 is formed with an internal thread for connecting with a water inlet pipe of a water heater, a circular boss 404 is formed at the bottom of the interface 403, a water inlet hole 405 is formed at the center of the circular boss 404, the interface 403 is communicated with the first cavity 401 through the water inlet hole 405, as shown in fig. 1, a sealing gasket 16 is sleeved outside the circular boss 404 in a matching manner, and an outer edge portion of the sealing gasket 16 is in interference fit with an inner wall of the interface 403. The gasket 16 is an annular rubber gasket having a rectangular cross section. When the connector 403 is screwed with the water inlet pipe of the water storage type electric water heater, the lower end surface of the water inlet pipe of the water storage type electric water heater is pressed against the upper end surface of the sealing gasket 16 by the locking force of the screw thread, and the lower end surface of the sealing gasket 16 is pressed against the bottom surface of the connector 403, so that the safety valve of the embodiment is more reliably connected with the water inlet pipe of the water storage type electric water heater in a sealing manner. Due to the fact that the circular boss 404 is connected with the sealing gasket 16 in an adaptive mode, the sealing gasket 16 is prevented from extending inwards after being extruded to occupy the water flowing cross section area of the water inlet 405, and the sealing gasket 16 is prevented from influencing the water flowing function of the water inlet 405. Because the outer edge of the gasket 16 is in interference fit with the inner wall of the interface 403, the gasket 16 is not easy to fall out due to inversion during transportation or installation.

Further, as shown in fig. 1, filter screen 9 is installed to the interior lower tip of water intaking valve mouth seat 8, and filter screen 9 can be the injection molding, and filter screen 9 can be fixed through interference fit with water intaking valve mouth seat 8, through setting up filter screen 9, is favorable to avoiding the bigger gravel and sand of volume or the iron rust fragment of running water pipe to enter into the utility model discloses inside, thereby effectively reduce the utility model discloses the condition of inefficacy or damage takes place.

Further, as shown in fig. 4, a water inlet pagoda spring support 2013 is arranged at the inner upper end of the inner leakage valve shell 201, the water inlet pagoda spring support 2013 and the inner leakage valve shell 201 are integrally arranged, and the water inlet pagoda spring support 2013 and the inner leakage valve shell 201 can be integrally formed in an injection molding mode. The pagoda spring support 2013 that intakes of prior art is an independent injection molding that is obconical, and can move about in shell 4 by a small margin, and the utility model discloses set up pagoda spring support 2013 that intakes and interior bleeder valve shell 201 as an organic whole, be favorable to the pagoda spring support 2013 that intakes to stably support water intaking valve pagoda spring 203 to the check valve function stability of intaking that is favorable to interior bleeder valve subassembly 2.

Further, as shown in fig. 6, a curved notch 2012 is formed at the lower end of the internal relief valve housing 201, the curved notch 2012 extends upward and then extends rightward, as shown in fig. 7 and 8, a screwing protrusion 2021 is formed at the upper end of the internal relief valve bottom cover 202, as shown in fig. 5, the screwing protrusion 2021 is fastened to the curved notch 2012, and the process of installing the internal relief valve bottom cover 202 to the internal relief valve housing 201 is as follows: the screwing lug 2021 of the internal leakage valve bottom cover 202 is aligned to the lower end opening of the curved notch 2012, the upper part of the internal leakage valve bottom cover 202 is inserted into the lower end of the internal leakage valve shell 201 in a matching manner, then the internal leakage valve bottom cover 202 is screwed, and the screwing lug 2021 is screwed into the right upper end of the curved notch 2012, so that the internal leakage valve bottom cover 202 is assembled with the internal leakage valve shell 201.

Further, as shown in fig. 10 and 11, a hexagonal end-plug 3012 is formed at the left end of the outer leakage valve casing 301, the hexagonal end-plug 3012 is actually a hexagonal boss, as shown in fig. 2, the inside of the outer shell 4 is formed with an inner hexagonal recessed platform 406, the inner and outer water discharge channels 15 pass through the middle of the inner hexagonal recessed platform 406, the hexagonal end plug 3012 is fittingly inserted into the inner hexagonal recessed platform 406, as shown in fig. 10, when the outer leakage valve casing 301 is manufactured, the position of the outer leakage through hole 3011 corresponds to the hexagon of the hexagonal end plug 3012, the angle of the hexagonal socket 406 also corresponds to the position of the outer leakage drain pipe 14, and then the hexagonal end plug 3012 is inserted into the hexagonal socket 406, when the outer leakage valve shell 301 is installed in the shell 4, the orientation effect of the inner hexagonal concave table 406 is facilitated, and the outer leakage hollow hole 3011 is easily ensured to be aligned with the outer leakage drain pipe 14.

Further, as shown in fig. 8, a leak-proof sealing gasket 13 is disposed between the left outer end surface of the outer leakage valve casing 301 and the left inner end surface of the second cavity 402, the outer leakage valve casing 301 is pressed on the leak-proof sealing gasket 13 by the thread locking force of the outer leakage valve casing pressing cover 10, and by disposing the leak-proof sealing gasket 13, the high-pressure water can be prevented from leaking out from between the outer wall of the outer leakage valve casing 301 and the inner wall of the second cavity 402.

Claims (6)

1. A modular safety valve for a water heater comprises a shell (4), wherein a first cavity (401), a second cavity (402) and an inner and outer leakage water channel (15) are formed in the shell (4), the first cavity (401) is communicated with the second cavity (402) through the inner and outer leakage water channel (15), an inner leakage valve component (2) is arranged in the first cavity (401), an outer leakage valve component (3) is arranged in the second cavity (402), a water inlet valve seat (8) is installed on the lower side of the first cavity (401) in a screwed mode of the shell (4), a sealing cover (11) is installed on the right side of the second cavity (402) in a screwed mode of the shell (4), an outer leakage water discharge pipe (14) is formed in the middle position corresponding to the second cavity (402), and the modular safety valve is characterized in that: including interior valve case (201) that lets out, the lower extreme of interior valve case (201) that lets out is connected with interior valve bottom (202) that lets out, interior valve subassembly (2) that lets out is installed in interior valve case (201) with in the cavity that interior valve bottom (202) enclosed, interior valve case (201) that lets out reaches interior valve bottom (202) is installed in first cavity (401), still include outer valve case (301) that lets out, install outside valve subassembly (3) in outer valve case (301), the inside spiro union of second cavity (402) is installed and is let out valve casing and compress tightly lid (10), outer valve case (301) are installed in second cavity (402), the left end face that the valve casing that lets out compressed tightly lid (10) with the right-hand member face of outer valve case (301) pastes and leans on the connection, it compresses tightly lid (10) to let out set up sealed lid (11) with between outer valve case (301), shell (4) is in the top of first cavity (401) is formed with interface (403), interface (403) are formed with the internal thread that is used for advancing water piping connection with the water heater, the bottom of interface (403) is formed with round boss (404), the center of round boss (404) is formed with inlet opening (405), interface (403) with first cavity (401) pass through inlet opening (405) intercommunication, the outside adaptation cover of round boss (404) is equipped with sealed pad (16), the outer edge portion of sealed pad (16) with the inner wall interference fit of interface (403).

2. The modular safety valve for water heaters according to claim 1, characterized in that: and a filter screen (9) is arranged at the inner lower end part of the water inlet valve seat (8).

3. The modular safety valve for water heaters according to claim 1, characterized in that: the upper end portion is equipped with into water pagoda spring support (2013) in interior bleeder valve shell (201), into water pagoda spring support (2013) with interior bleeder valve shell (201) integration sets up.

4. The modular safety valve for water heaters according to claim 1, characterized in that: the lower end of the internal leakage valve shell (201) is provided with a curved notch (2012), the upper end of the internal leakage valve bottom cover (202) is provided with a screwing lug (2021), and the screwing lug (2021) is buckled with the curved notch (2012).

5. The modular safety valve for water heaters according to claim 1, characterized in that: a hexagonal end plug (3012) is formed at the left end of the outer shell (301) of the external leakage valve, an inner hexagonal concave table (406) is formed inside the outer shell (4), the inner and outer leakage water channel (15) penetrates through the middle of the inner hexagonal concave table (406), and the hexagonal end plug (3012) is inserted into the inner hexagonal concave table (406) in an adaptive mode.

6. The modular safety valve for water heaters according to claim 1, characterized in that: and a leakage-proof sealing gasket (13) is arranged between the left outer end surface of the outer leakage valve shell (301) and the left inner end surface of the second cavity (402).

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