CN111219508B - Pressure protection valve and gas water heater - Google Patents
Pressure protection valve and gas water heater Download PDFInfo
- Publication number
- CN111219508B CN111219508B CN201811418317.1A CN201811418317A CN111219508B CN 111219508 B CN111219508 B CN 111219508B CN 201811418317 A CN201811418317 A CN 201811418317A CN 111219508 B CN111219508 B CN 111219508B
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- Prior art keywords
- valve
- core assembly
- seat
- plug
- rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
Abstract
The invention relates to a pressure protection valve and a gas water heater, comprising a valve body, wherein a valve core assembly is arranged in a valve cavity of the valve body, and the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity; it is characterized in that two opposite side walls on the valve body are respectively provided with a groove and a guide groove; the valve core assembly comprises a second valve core assembly and a first valve core assembly; wherein: the second valve core assembly is arranged in the valve cavity and used for controlling the on and off of the water inlet, and the second valve core assembly is in a normally open state; the first valve core assembly is used for controlling the action of the second valve core assembly; the valve comprises a first valve rod, a first valve plug and a first elastic piece; the first valve plug can be slidably and hermetically connected with the peripheral wall of the groove, and the first elastic piece is abutted against the bottom surface of the groove and the first valve plug; one end of the first valve rod is in driving connection with the first valve plug, and the other end of the first valve rod can be accommodated in the guide groove in a sliding mode; the first valve rod drives the second valve core assembly to act.
Description
Technical Field
The invention relates to the field of valves, in particular to a pressure protection valve and a gas water heater using the same.
Background
The existing domestic water has the problem of pressure fluctuation generally due to reasons such as water supply and terminal use, and the water inlet end of the water pipe is a normally open valve and the water outlet end of the water pipe is a normally closed valve for some normally open connecting water pipes, so that the water pipe is easy to expand and crack when the pressure in the water pipe rises suddenly, for example, the water pipe is frozen and expanded, and the water can crack from the weak part of the pressure bearing capacity of the water pipe, so that water leakage is caused. If the user does not discover in time that the water inlet pipeline is closed, water in the water source pipeline can continuously enter the connecting water pipe and run out from the crack, so that serious water leakage is caused, and property loss and safety problems such as floor soaking, electric leakage and the like are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure protection valve which can timely close a water inlet connecting pipe when the pressure in a water pipe suddenly rises in the prior art.
The invention aims to solve another technical problem of providing a gas water heater which can timely close a water inlet connecting pipe when the pressure in a water pipe suddenly rises so as to avoid the water leakage phenomenon.
The technical scheme adopted by the invention for solving the technical problems is as follows: a pressure protection valve comprises a valve body, wherein a valve core assembly is arranged in a valve cavity of the valve body, and the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity;
the valve is characterized in that two opposite side walls of the valve body are respectively provided with a groove and a guide groove;
the valve core assembly comprises a second valve core assembly and a first valve core assembly; wherein:
the second valve core assembly is arranged in the valve cavity and used for controlling the on and off of the water inlet, and the second valve core assembly is in a normally open state;
the first valve core assembly is used for controlling the action of the second valve core assembly; the valve comprises a first valve rod, a first valve plug and a first elastic piece; the first valve plug is slidably and hermetically connected with the peripheral wall of the groove, and the first elastic piece is abutted against the bottom surface of the groove and the first valve plug; one end of the first valve rod is in driving connection with the first valve plug, and the other end of the first valve rod is slidably accommodated in the guide groove; the first valve rod drives the second valve core assembly to act.
The first valve core assembly further comprises a first valve seat arranged on the port of the groove, a first water passing hole and a first sliding hole are formed in the first valve seat, and the first valve rod can be slidably arranged in the first sliding hole in a penetrating mode.
And a limiting part used for limiting the moving distance of the first valve plug is arranged in the groove.
The side wall of the valve body is connected with a side pipe communicated with the valve cavity, a threaded seat is connected to the port of the side pipe, and the side pipe and the threaded seat are assembled to form the groove; the limiting piece is formed by a step part which is arranged in the threaded seat and is protruded on the inner wall of the bypass pipe.
The first elastic piece is an arc-shaped elastic piece, the periphery of the first elastic piece abuts against the limiting piece, and the arc-shaped surface of the first elastic piece abuts against the first valve plug.
And a sealing ring is arranged between the first valve plug and the inner wall of the side pipe.
The second valve core assembly in each scheme can be various, preferably, the second valve core assembly comprises a second valve seat, a second valve rod, a second valve plug, a second elastic piece and a second base;
the second valve rod can be limited on the second valve seat and the second base in a sliding way, and the second valve plug is connected with the second valve rod in a driving way and is positioned between the second valve seat and the second base; two ends of the second elastic piece respectively abut against the second valve plug and the second base;
the first valve rod is provided with a second clamping groove for limiting the head of the second valve rod extending out of the second valve seat, and a through hole for the head of the second valve rod to pass through; and the side wall of the second clamping groove is an arc-shaped surface or an inclined surface which is convenient for the second valve rod to slide out of the second clamping groove.
In order to facilitate the assembly of the second valve plug and ensure the structural stability, a piston seat may be provided on the second valve stem, on which the second valve plug is disposed.
Preferably, the second base and the second valve seat are both provided with second sliding holes, the tail of the second valve rod can be limited in the second sliding hole on the second base in a sliding manner, and the head of the second valve rod penetrates through the second sliding hole on the second valve seat and abuts against the first valve rod.
The gas water heater using the pressure protection valves is characterized in that a water inlet of the valve body is connected with a domestic water pipe, and a water outlet on the valve body is connected with an inlet of a cold water inlet pipe of the gas water heater;
the cold water inlet pipe is also connected with a plastic shell communicated with the cold water inlet pipe, and a flow sensor and a pressure stabilizer are integrated in the plastic shell.
Compared with the prior art, the pressure protection valve and the gas water heater provided by the invention can timely disconnect the normally open pipeline from the water source when the pressure is suddenly increased through the interaction between the two valve core assemblies, so that the water leakage phenomenon is avoided, and the use safety is further ensured.
Drawings
FIG. 1 is a longitudinal cross-sectional view (normal use) of an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view (pressure relief state) of an embodiment of the present invention;
fig. 3 is a schematic view of embodiment 2 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and 2, the pressure protection valve includes:
the wall of the valve body 1 is provided with a water inlet 11 and a water outlet 12 which are communicated with a valve cavity 14. Two opposite side walls of the valve body are respectively provided with a groove 13 and a guide groove 16.
The guide groove 13 in this embodiment is composed of a bypass pipe 131 and a screw seat 132. Wherein, the side pipe 131 is integrally formed on the side wall of the valve body and is communicated with the valve cavity 14, the external port of the side pipe 131 is connected with the internal thread seat 132, and the side pipe 131 and the thread seat 132 are assembled to form the groove 13; and a stopper 4 formed in a stepped portion of the screw seat 132, which is protruded from an inner wall of the bypass pipe, for restricting a stroke of the first valve plug. The bottom surface of the screw seat is provided with an air hole 133.
The threaded socket may also be replaced by a clamping socket. And the two valve core assemblies comprise a second valve core assembly 2 arranged on the water inlet 11 and used for controlling the on and off of the water inlet 11 and a first valve core assembly 3 arranged in the bypass pipe 13 and used for controlling the second valve core assembly 2 to act. Wherein:
and the second valve core assembly 2 comprises a second valve seat 21, a second valve rod 22, a second valve plug 23, a second elastic element 24 and a second base 25.
The second base 25 and the second valve seat 21 are arranged in the valve cavity 14 at intervals along the water flow direction, the second base 25 is arranged close to the port of the water inlet 11, and the second base 25 and the second valve seat 21 are both provided with a water through hole 26 for water flow to pass through and a second slide hole 27 for accommodating the second valve rod. The tail part of the second valve rod 22 is slidably accommodated in a second sliding hole 27 on the second base 25, and the head part of the second valve rod is slidably exposed out of the second valve seat 21 through the second sliding hole 27 on the second valve seat 21; the second valve rod 22 is connected with a piston seat 28 in a driving way, and the second valve plug 23 is arranged on the piston seat 28 and moves along with the piston seat 28; the second elastic member 24 is a spring, and is disposed on the second valve rod 22, and two ends of the second elastic member respectively abut against the second base 25 and the piston seat 28, so that the second valve plug has a tendency of moving away from the second base and closing the water through hole 26 on the second valve seat 21 toward the second valve seat.
The first valve core assembly 3 comprises a first valve rod 32, a first valve plug 33, a first valve seat 38 and a first elastic member 34.
The first valve plug 33 is connected with the inner wall of the side pipe 131 in a sliding and sealing way through a sealing ring 36, and a first valve seat 38 is arranged on the port of the side pipe close to the valve cavity and is provided with a first sliding hole 31 for the first valve rod 32 to slide through; one end of the first valve rod is connected with a first valve plug 33 in a driving way, and the first valve plug and the first valve rod are integrated in the embodiment; the other end of the first valve stem is slidably received in the guide groove 16.
The first valve seat 38 is further provided with a plurality of first water through holes 39 at intervals so that the first valve plug 33 senses the water pressure in the valve cavity.
The first valve rod 32 is provided with a clamping groove 35 and a through hole 37. The peripheral wall of the locking groove 35 is an arc-shaped surface so that the second valve stem 22 can slide out of the locking groove 35 smoothly. The catching groove 35 and the through-hole 37 are close to each other, and the through-hole is provided close to the guide groove
The first valve plug 33 is located between the first valve seat 38 and the threaded seat 132 and is movable relative to the bypass pipe by an external force.
The first elastic member 34 is an arc-shaped elastic sheet, the periphery of which abuts against the step formed by the limiting member 4, i.e. the threaded seat, and the arc-shaped surface of the first elastic member abuts against the first valve plug 33, so that the first valve plug 33 tends to be away from the threaded seat 132.
When pressure was in the normal value within range in the water route, first valve plug pushed down under the effect of first elastic component, and the head end card of second valve rod is in draw-in groove 35, and second elastic component 24 is compressed, and the water hole of crossing on the second valve seat is opened, and this protection valve is in normally open state.
When pressure fluctuation in the water channel suddenly rises, when the force applied to the first valve plug by water pressure is larger than the elastic force of the first elastic piece, the water pressure pushes the first valve plug to move to extrude the first elastic piece, the first valve plug drives the valve rod to move upwards, the clamping groove is separated from limiting the head end of the second valve rod along with the movement of the first valve rod, and the force applied to the second valve rod is cancelled; when the second valve rod is separated from the clamping groove, the second valve rod moves towards the second valve seat under the action of the second elastic piece, the head of the second valve rod is inserted into the through hole 37, the first valve rod has no blocking force on the second valve rod, the second valve plug closes the water through hole in the second valve seat, and the protection valve is closed.
At the moment, even if the pressure in the pipe rises to be very high, when the pipeline or the connecting pipe fitting is burst, because the water inlet is closed, the water remained in the pipeline can be discharged at most, the phenomenon of a large amount of water leakage can not occur, and the use safety is effectively ensured.
When the first valve plug moves to the position of the threaded seat, the first valve plug is stopped by a step formed by the threaded seat, and the first valve rod is limited to move continuously.
Example 2
As shown in fig. 3, the pressure protection valve of embodiment 1 is applied to the water heater connection pipe; the concrete mode is as follows: the water inlet 11 of the valve body is connected with a living water pipe 91, and the water outlet 12 of the valve body is connected with a cold water inlet pipe 92 of the water heater; the cold water inlet pipe 92 is connected with a plastic shell 93, the plastic shell 93 is located at the downstream of the pressure protection valve, a pressure sensor (not shown in the figure) and a pressure stabilizer (not shown in the figure) are arranged in the plastic shell, and the pressure sensor and the pressure stabilizer are integrated in the plastic shell 93 and used for detecting the water passing amount of the water inlet pipe 92 and the water pressure in the constant water inlet pipe.
The rest is the same as in example 1.
When the pressure in the pipeline of the water heater is suddenly increased, the plastic shell is easy to break due to poorer pressure bearing performance compared with a metal water pipe, so that the residual water in the water pipe flows out from the broken part; at the moment, if the cold water inlet pipe is not closed in time, water in the living water pipe can continuously enter the cold water inlet pipe, and the water can run out from the fracture part, so that water runs out. This embodiment is owing to set up the pressure protection valve between life water pipe 91 and cold water inlet tube 92, when the intraductal pressure suddenly risees, this protection valve can self-closing cold water inlet tube to avoid the emergence of the phenomenon of running out of water.
Claims (9)
1. A pressure protection valve comprises a valve body (1), wherein a valve core assembly is arranged in a valve cavity (14) of the valve body (1), and the valve body (1) is provided with a water inlet (11) and a water outlet (12) which are communicated with the valve cavity (14);
the valve is characterized in that two opposite side walls of the valve body (1) are respectively provided with a groove (13) and a guide groove (16);
the valve core assembly comprises a second valve core assembly (2) and a first valve core assembly (3); wherein:
the second valve core assembly (2) is arranged in the valve cavity (14) and used for controlling the on and off of the water inlet (11), the second valve core assembly (2) is in a normally open state, and the second valve core assembly (2) comprises a second valve seat (21), a second valve rod (22), a second valve plug (23), a second elastic piece (24) and a second base (25); the second valve rod (22) can be limited on the second valve seat (21) and a second base (25) in a sliding way, and the second valve plug (23) is connected with the second valve rod (22) in a driving way and is positioned between the second valve seat (21) and the second base (25); two ends of the second elastic piece respectively abut against the second valve plug (23) and the second base (25);
the first valve core assembly (3) is used for controlling the action of the second valve core assembly; the first valve core assembly (3) comprises a first valve rod (32), a first valve plug (33) and a first elastic piece (34); the first valve plug (33) is connected with the peripheral wall of the groove (13) in a sliding and sealing mode, and the first elastic piece (34) abuts against the bottom surface of the groove (13) and the first valve plug (33); one end of the first valve rod (32) is in driving connection with the first valve plug (33), and the other end of the first valve rod (32) is slidably accommodated in the guide groove (16); the first valve rod drives the second valve core assembly (2) to act, and a clamping groove (35) used for limiting the head of the second valve rod extending out of the second valve seat and a through hole (37) for the head of the second valve rod to pass through are formed in the first valve rod (32); and the side wall of the clamping groove is an arc-shaped surface or an inclined surface which is convenient for the second valve rod to slide out of the clamping groove (35).
2. The pressure protection valve according to claim 1, wherein the first valve core assembly (3) further comprises a first valve seat (38) arranged at the port of the groove (13), a first water through hole (39) and a first slide hole (31) are arranged on the first valve seat (38), and the first valve rod (32) is slidably arranged in the first slide hole (31) in a penetrating manner.
3. Pressure protection valve according to claim 1, characterized in that a stop (4) for limiting the distance of movement of the first valve plug (33) is provided in the recess (13).
4. The pressure protection valve according to claim 3, characterized in that a side wall of the valve body is connected with a side pipe (131) communicated with the valve cavity (14), a threaded seat (132) is connected to a port of the side pipe (131), and the side pipe (131) and the threaded seat (132) are assembled to form the groove (13); the limiting piece (4) is formed by a step part which is arranged in the threaded seat (132) and is protruded on the inner wall of the bypass pipe.
5. Pressure protection valve according to claim 4, characterized in that the first elastic element (34) is a dome spring, the periphery of which abuts against the retaining element (4) and the dome surface of which abuts against the first valve plug (33).
6. Pressure protection valve according to claim 4, characterized in that a sealing ring (36) is provided between the first valve plug (33) and the inner wall of the bypass duct (131).
7. Pressure protection valve according to any of claims 1 to 6, characterized in that a piston seat (28) is provided on the second valve stem (22), the second valve plug (23) being provided on the piston seat (28).
8. The pressure protection valve according to claim 7, wherein the second base (25) and the second valve seat (21) are both provided with a second sliding hole (27), the tail of the second valve rod (22) is slidably limited in the second sliding hole (27) of the second base (25), and the head of the second valve rod (22) passes through the second sliding hole (27) of the second valve seat (21) and interferes with the first valve rod (32).
9. Gas water heater using pressure protection valve according to any of claims 1 to 8, characterized in that the inlet of the valve body is connected with the domestic water pipe (91), and the outlet of the valve body is connected with the inlet of the cold water inlet pipe (92) of the gas water heater;
the cold water inlet pipe (92) is also connected with a plastic shell (93) communicated with the cold water inlet pipe (92), and a flow sensor and a pressure stabilizer are integrated in the plastic shell (93).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418317.1A CN111219508B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418317.1A CN111219508B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111219508A CN111219508A (en) | 2020-06-02 |
| CN111219508B true CN111219508B (en) | 2021-07-23 |
Family
ID=70828703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811418317.1A Active CN111219508B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219508B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623155B (en) * | 2019-02-28 | 2021-05-18 | 宁波方太厨具有限公司 | Pressure protection valve and gas water heater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2474848Y (en) * | 2001-04-10 | 2002-01-30 | 张玉茂 | Steady pressure cut-off water valve |
| CN104441586A (en) * | 2013-09-13 | 2015-03-25 | 克朗斯股份公司 | Blow moulding machine with a pneumatically operated blow air valve and a method for operating such a blow moulding machine |
| CN204533703U (en) * | 2015-03-31 | 2015-08-05 | 李光艺 | A kind of air reducing valve |
-
2018
- 2018-11-26 CN CN201811418317.1A patent/CN111219508B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2474848Y (en) * | 2001-04-10 | 2002-01-30 | 张玉茂 | Steady pressure cut-off water valve |
| CN104441586A (en) * | 2013-09-13 | 2015-03-25 | 克朗斯股份公司 | Blow moulding machine with a pneumatically operated blow air valve and a method for operating such a blow moulding machine |
| CN204533703U (en) * | 2015-03-31 | 2015-08-05 | 李光艺 | A kind of air reducing valve |
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| Publication number | Publication date |
|---|---|
| CN111219508A (en) | 2020-06-02 |
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