CN112524311B

CN112524311B - Water inlet joint and gas water heater comprising same

Info

Publication number: CN112524311B
Application number: CN202011372793.1A
Authority: CN
Inventors: 吴帅; 朱海龙; 沈文权; 魏苗苗; 王雲涛
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-12-03
Anticipated expiration: 2040-11-30
Also published as: CN112524311A

Abstract

The invention discloses a water inlet joint and a gas water heater comprising the same. This water supply connector includes: a housing having a fluid passageway therein communicating a fluid inlet and a fluid outlet of the housing; a valve element provided in the housing and capable of reciprocating in a first direction to open and close the fluid passage; a first elastic member biasing the spool in a direction such that the spool closes the fluid passage; and the limiting piece limits the valve core to close the fluid channel, and can remove the limitation on the valve core when the fluid pressure in the fluid channel is greater than a preset value. The limiting member releases the limitation on the valve core when the fluid pressure in the fluid passage is greater than a predetermined value, so that the valve core closes the fluid passage under the action of the first elastic member when the fluid pressure in the fluid passage is greater than the predetermined value, thereby preventing the fluid pressure at the fluid outlet side of the water inlet joint from exceeding the predetermined value.

Description

Water inlet joint and gas water heater comprising same

Technical Field

The invention relates to the field of gas water heaters, in particular to a water inlet joint and a gas water heater comprising the same.

Background

When the water pressure of the user entering the house is too high or the internal pressure is too high due to freezing in cold weather, the risk of the expansion crack of the household gas water heater of the user exists. And the water inlet end of the water heater is a normally open valve, the water outlet end of the water heater is a normally closed valve, and the inside of the pipeline bears certain water pressure in a non-working state. When water pressure fluctuation causes continuous fluctuation of water flow, water outlet of the machine is suddenly cooled and suddenly heated, use of a user is seriously affected, and when the water pressure exceeds limit pressure, weak parts of pressure bearing capacity of plastic parts such as a common water valve and the like can be cracked firstly. If the user does not find that the water inlet valve is closed in time, the whole machine leaks water, and property loss and safety problems such as floor water soaking, electric leakage and the like are caused.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a water inlet joint and a gas water heater comprising the same.

The invention solves the technical problems through the following technical scheme:

a water inlet fitting, comprising:

the fluid channel is communicated with the fluid inlet and the fluid outlet of the shell;

a valve element disposed in the housing and capable of reciprocating in a first direction to open and close the fluid passage;

a first elastic member that biases the spool in a direction such that the spool closes the fluid passage; and

and the limiting piece limits the valve core to close the fluid channel, and can remove the limitation on the valve core when the fluid pressure in the fluid channel is greater than a preset value.

In the scheme, the limiting piece releases the limitation on the valve core when the fluid pressure in the fluid channel is greater than a preset value, so that the valve core closes the fluid channel under the action of the first elastic piece when the fluid pressure in the fluid channel is greater than the preset value, and the fluid pressure on the fluid outlet side of the water inlet joint is prevented from exceeding the preset value.

Preferably, a valve opening is formed in the housing, and the valve core is used for opening and closing the valve opening.

Preferably, the stopper is provided on a fluid inlet side of the valve opening;

the stopper is movable in a second direction according to a fluid pressure of a fluid inlet side of the valve opening.

Preferably, the stopper includes a moving portion and a second elastic member;

the moving portion is movable in a second direction according to a fluid pressure on a fluid inlet side of the valve opening, the moving portion restricts the valve spool from closing the fluid passage, and the second elastic member biases the moving portion in a direction such that the moving portion restricts the valve spool.

Preferably, the moving portion has an abutment surface that senses a fluid pressure on a fluid inlet side of the valve opening and a pressure sensing surface that abuts the valve spool.

Preferably, the moving portion further has a lock surface facing the valve element in the second direction, and the lock surface is configured to prevent the valve element from being restricted again after the restriction of the valve element by the stopper is released.

In this case, the water inlet joint is provided with a lock surface facing the valve element, thereby preventing the moving part from being re-inserted between the valve element and the valve seat after being separated.

Preferably, the abutment surface is arcuate.

In this scheme, the butt face is the arc, is convenient for the case to slide for the butt face to increase the sensitivity that spacing face removed according to fluid pressure.

Preferably, the valve core comprises a sealing cover, and a sliding block is arranged at the edge of the sealing cover and used for abutting against the abutting surface and sliding on the abutting surface.

In this scheme, set up the slider, the sealed lid of being convenient for slides for the butt face to increase the sensitivity that spacing face removed according to fluid pressure.

Preferably, a valve seat is provided in the housing, and an engagement groove for receiving the slider is provided on the valve seat, and the slider protrudes from the sealing cover toward the valve seat.

Preferably, the first direction is perpendicular to the second direction.

Preferably, the water inlet joint comprises two limiting pieces, and the two limiting pieces are oppositely arranged by taking the valve core as a center.

In this scheme, two the locating part uses the case sets up relatively as the center, makes things convenient for the atress balance of case for it is spacing easier.

Preferably, the slider is of cylindrical configuration.

In this scheme, the sealed lid of columniform slider is convenient for slide for the butt face to increase the sensitivity that spacing face removed according to fluid pressure.

A gas water heater comprising a water inlet fitting as described above.

The positive progress effects of the invention are as follows:

1. the gas water heater adopts a pure mechanical structure, has good reliability, and can realize self-locking of water inlet in time when the gas water heater has a crack risk;

2. the volume is small, the adaptability is high, and the water heater can be universally used for all water heater products;

3. the device is suitable for various severe environments (failure caused by overheating or supercooling, such as broken ice chips) is avoided;

4. the water pressure resistance fluctuation is strong, and the water flow can be stabilized at a fixed value under the condition of high water pressure;

5. the influence of sudden cold and sudden heat caused by fluctuation of water of a user can be solved;

6. the space and the cost of the whole machine are saved.

Drawings

Fig. 1 is a perspective view illustrating a water inlet joint according to an embodiment of the present invention.

Fig. 2 is a sectional structure view of the water inlet joint taken along line a-a of fig. 1.

Fig. 3 is a sectional structure view of the water inlet joint taken along the line B-B in fig. 1.

Fig. 4 is a schematic cross-sectional view illustrating a water inlet joint according to an embodiment of the present invention in a second state.

Fig. 5 is a schematic cross-sectional view illustrating a water inlet joint according to an embodiment of the present invention in a third state.

Description of reference numerals:

water inlet joint 100

Outer casing 101

Valve seat 103

Valve opening 104

Support 105

Projection 106

Fluid inlet 107

Fluid outlet 108

The engaging groove 109

Valve cartridge 111

Sealing cover 113

Slider 114

Valve stem 115

Stop member 116

End cap 117

First elastic member 121

Limiting member 131

Limiting slide rail part 133

Abutting surface 135

Locking surface 136

Compression cover 141

Medial side 143

Outer side 144

Second elastic member 151

Detailed Description

The present invention is further illustrated by way of example and not by way of limitation in the scope of the embodiments described below in conjunction with the accompanying drawings.

As shown in fig. 1 to 5, the water inlet joint 100 includes: the valve comprises a shell 101, a valve core 111, a first elastic element 121 and a limiting element 131.

A fluid passage is provided in the housing 101 that communicates the fluid inlet 107 and the fluid outlet 108 of the housing 101. A valve seat 103 and a valve opening 104 are provided in the housing 101, the valve opening 104 is provided at the center of the valve seat 103, and a valve body 111 opens and closes the valve opening 104.

The valve body 111 is provided in the housing 101 and is capable of reciprocating in the first direction X to open and close the fluid passage.

The valve cartridge 111 includes a sealing cap 113 and a stem 115, and the stem 115 is coupled to the center of the sealing cap 113. The valve stem 115 is slidably supported on the bracket 105 provided in the housing 101, and the axial direction of the valve stem 115 is parallel to the first direction X.

When the sealing cap 113 abuts against the valve seat 103, the valve opening 104 can be sealed. The edge of the sealing cover 113 is provided with a slider 114, and the slider 114 protrudes from the sealing cover 113 toward the valve seat 103. The valve seat 103 is provided with an engaging groove 109, and the engaging groove 109 is used for receiving a slider 114, so that when the sealing cover 113 abuts against the valve seat 103, no gap is left between the valve seat 103 and the sealing cover 113 due to the slider 114.

The first elastic member 121 biases the spool 111 in a direction such that the spool 111 closes the fluid passage.

The first elastic member 121 is disposed at the fluid outlet side of the valve opening 104. One end of the first elastic member 121 abuts against a surface of the valve seat 103 on the fluid outlet side, and the other end of the first elastic member 121 abuts against an end cap 117, and the end cap 117 is fixed to the valve stem 115. In this embodiment, the first elastic element 121 is a spring and is in a compressed state.

The stopper 131 restricts the valve element 111 from closing the fluid passage, and the stopper 131 can release the restriction of the valve element 111 when the fluid pressure in the fluid passage is greater than a predetermined value.

The restriction member 131 releases the restriction of the valve element 111 when the fluid pressure in the fluid passage is greater than a predetermined value, so that the valve element 111 closes the fluid passage under the action of the first elastic member 121 when the fluid pressure in the fluid passage is greater than the predetermined value, thereby preventing the fluid pressure at the fluid outlet side of the water inlet joint 100 from exceeding the predetermined value.

The stopper 131 is provided on the fluid inlet side of the valve opening 104. The stopper 131 is movable in the second direction Y in accordance with the fluid pressure on the fluid inlet side of the valve opening 104.

The stopper 131 includes a moving portion and a second elastic member 151. The moving portion is movable in the second direction Y according to the fluid pressure of the fluid inlet side of the valve opening 104, the moving-portion restricting spool 111 closes the fluid passage, and the second elastic member 151 biases the moving portion in a direction such that the moving-portion restricting spool 111.

The moving part has a stopper rail part 133 and a compression cover 141 connected to each other. The stopper rail portion 133 has an abutment surface 135 facing the spool 111. The slider 114 abuts the abutment surface 135 and slides on the abutment surface 135. The inner side 143 of the compression cap 141 is a pressure sensing surface and directly contacts the fluid in the fluid passage of the casing 101 to sense the fluid pressure of the fluid, and the outer side 144 of the compression cap 141 abuts against the second elastic member 151, and the second elastic member 151 presses the compression cap 141 in the second direction Y. The housing 101 is provided with a projection 106 projecting outward from the outer peripheral wall thereof, and the second elastic member 151 is provided in the projection 106.

In this embodiment, the second elastic member 151 is a spring and is in a compressed state. The compression cap 141 is sealed with respect to the inner sidewall of the protrusion 106, and the outer sidewall of the compression cap 141 is communicated with the external atmosphere, so that the pressure difference between the inner and outer sidewalls of the compression cap 141 is changed according to the change of the fluid pressure at the fluid inflow side of the valve opening 104.

The stopper rail 133 further has a lock surface 136 facing the valve body 111 in the second direction Y, and the lock surface 136 prevents the stopper 131 from releasing the restriction of the valve body 111 and then restricts the valve body 111 again.

The water inlet joint 100 is provided with a locking surface 136, which locking surface 136 faces the valve element 111, thus preventing the moving part from being re-inserted between the valve element 111 and the valve seat 103 after being removed.

In the present embodiment, slider 114 is a cylindrical structure. However, the present invention is not limited thereto, and the slider 114 may be spherical or square, etc.

The abutting surface 135 is arc-shaped and provided with the cylindrical slider 114, so that the valve element 111 can slide relative to the abutting surface 135, thereby increasing the sensitivity of the limiting surface to move according to the fluid pressure.

The first direction X is perpendicular to the second direction Y.

In the present embodiment, the water inlet joint 100 includes two limiting members 131, and the two limiting members 131 are disposed opposite to each other with the valve element 111 as the center. The two limiting members 131 are oppositely arranged by taking the valve core 111 as a center, so that the valve core 111 is convenient to balance in stress, and the limiting is easier. However, the present invention is not limited thereto, and the number of the limiting members 131 may be set as needed. The stop 131 is arranged such that it does not seal the valve opening 104 in any state.

The operation of the water inlet fitting 100 is described below with reference to fig. 3-5.

Fig. 3 illustrates a first state of the water inlet connection 100 in which the fluid pressure at the fluid inlet side of the valve opening 104 is less than a first threshold value.

At this time, the compression cap 141 is located at the first position by the elastic force of the second elastic member 151, the stopper rail 133 is located at the position closest to the stem 115 of the valve body 111, the sealing cap 113 is farthest from the valve seat 103, the other end of the stem 115 is provided with the stopper 116, and the stopper 116 abuts against the holder 105, thereby preventing the sealing cap 113 from coming off the abutment surface 135.

Fig. 4 illustrates a second state of the water inlet connection 100 in which the fluid pressure at the fluid inlet side of the valve opening 104 is greater than the first threshold value, but less than a second threshold value (predetermined value).

At this time, the compression cap 141 is moved in a direction away from the valve body 111 against the elastic force of the second elastic member 151 by the fluid pressure, and the seal cap 113 is slid toward the valve seat 103 along the abutment surface 135 by the first elastic member 121, but does not seal the valve opening 104.

Fig. 5 illustrates a third state of the water inlet connection 100 in which the fluid pressure at the fluid inlet side of the valve opening 104 is greater than a second threshold value.

At this time, the compression cap 141 is moved toward a direction away from the valve body 111 against the elastic force of the second elastic member 151 by the fluid pressure, and the seal cap 113 has slid to the lowermost end of the abutment surface 135 and disengaged from the stopper rail portion 133, the slider 114 is caught in the engagement groove 109, and the seal cap 113 seals the valve opening 104. Thereafter, when the fluid pressure on the fluid inlet side of the valve opening 104 is again less than the second threshold value, the compression cap 141 moves toward the valve body 111, but the locking surface 136 of the stopper rail 133 abuts against the edge of the sealing cap 113, and cannot be inserted between the sealing cap 113 and the valve seat 103, and the water inlet joint 100 is self-locked.

The embodiment also provides a gas water heater, which comprises the water inlet joint 100. By arranging the water inlet structure in the gas water heater, the problem that a pipeline in the gas water heater is broken when the water pressure at the water inlet end of the gas water heater is too high or the water pressure fluctuation is too high can be avoided.

The positive progress effects of the invention are as follows:

6. the space and the cost of the whole machine are saved.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A water inlet joint, characterized in that it comprises:

a stopper that restricts the valve element from closing the fluid passage, and that is capable of releasing restriction on the valve element when a fluid pressure in the fluid passage is greater than a predetermined value;

a valve opening is formed in the shell, and the valve core is used for opening and closing the valve opening;

the limiting piece is arranged on the fluid inlet side of the valve opening;

the stopper is movable in a second direction according to a fluid pressure of a fluid inlet side of the valve opening;

the limiting piece comprises a moving part and a second elastic piece;

the moving portion is movable in a second direction according to a fluid pressure on a fluid inlet side of the valve opening, the moving portion restricts the valve spool from closing the fluid passage, and the second elastic member biases the moving portion in a direction such that the moving portion restricts the valve spool;

the moving portion has an abutting surface that senses a fluid pressure on a fluid inlet side of the valve opening and a pressure sensing surface that abuts the valve spool.

2. The water inlet joint as claimed in claim 1, wherein the moving portion further has a locking surface facing the valve element in the second direction, the locking surface being configured to prevent the valve element from being re-restrained after the stopper releases the restraint on the valve element.

3. The water inlet joint of claim 1 wherein said abutment surface is arcuate.

4. The water inlet joint of claim 1, wherein the valve core comprises a sealing cover, and a sliding block is arranged at the edge of the sealing cover and used for abutting against the abutting surface and sliding on the abutting surface.

5. The water inlet joint as claimed in claim 4, wherein a valve seat is provided in the housing, and an engagement groove for receiving the slider is provided on the valve seat, and the slider protrudes from the sealing cover toward the valve seat.

6. The water inlet joint of claim 1, wherein the first direction is perpendicular to the second direction.

7. The water inlet joint of claim 1, wherein the water inlet joint comprises two of the retaining members, and the two retaining members are disposed opposite to each other centering on the valve core.

8. The water inlet joint of claim 4 wherein the slider is of cylindrical configuration.

9. A gas water heater characterized in that it comprises a water inlet joint according to any one of claims 1-8.