CN211039825U

CN211039825U - Decompression valve for water heater

Info

Publication number: CN211039825U
Application number: CN201922002404.5U
Authority: CN
Inventors: 马红梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-17
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a relief valve for water heater, including disk seat and valve body, be equipped with the water channel in the disk seat, the valve body is installed in the water channel, be equipped with in the valve body with the pressure release passageway of water channel intercommunication, the one end of pressure release passageway is equipped with the entry, the other end is equipped with the export, is equipped with regulation plug screw and seal receptacle in the pressure release passageway, be equipped with the spring between regulation plug screw and the seal receptacle, install the sealing member on the seal receptacle, the inner wall of pressure release passageway entrance be coniform, the sealing member is equipped with the circular arc along week and seals the face, the circular arc sealed face cooperatees with the conical side face. The utility model discloses the contact area of well sealing member and valve body is little to the very big possibility that reduces the adhesion between the two still can avoid causing the problem of emergence leakage when airtight again because of the sealing member warp with the offset under the spring.

Description

Decompression valve for water heater

Technical Field

The utility model belongs to the technical field of the relief valve, especially, relate to a relief valve for water heater.

Background

On a gas water heater, in order to prevent the water heater and a rear end pipeline and a shower head thereof from being damaged due to overhigh water pressure and even flooding a room, a disaster or downstairs, an adjustable pressure relief valve is generally arranged at a cold water inlet of the water heater. When the water pressure in the appliance is too high, the pressure relief valve can be automatically opened to drain water, so that the internal pressure of the appliance is ensured to be in a safe pressure range.

Common relief valve for gas heater is as shown in fig. 1 to 3, including disk seat 1 and valve body 2, be equipped with water channel 11 in the disk seat 1, valve body 2 installs in water channel 11, is equipped with the pressure release passageway 21 with water channel 11 intercommunication in the valve body 2, and the one end of pressure release passageway 21 is equipped with entry 22, and the other end is equipped with export 23, is equipped with in the pressure release passageway 21 and adjusts plug screw 3 and seal receptacle 4, be equipped with spring 5 between regulation plug screw 3 and the seal receptacle 4, install sealing member 6 on the seal receptacle 4. The seal member 6 is deformed by the spring force for a long time to form uneven indentations on the surface of the seal member 6, and the seal member 6 is compressed and permanently deformed due to the long-time compression, so that the indentations are difficult to restore (as shown in fig. 2). When the pressure relief valve is opened due to too high internal pressure, the spring 5 is compressed and deflected, and the sealing member 6 is difficult to return to the original position, so that the pressure relief valve is difficult to reseal and leak water, or even if the pressure relief valve is sealed, the pressure of the pressure relief valve is far lower than the originally set safety pressure (as shown in fig. 3).

Another kind of common relief valve is as shown in fig. 4 to 6, including disk seat 1 and valve body 2, be equipped with water channel 11 in the disk seat 1, valve body 2 installs in water channel 11, is equipped with the pressure release passageway 21 with water channel 11 intercommunication in the valve body 2, and the one end of pressure release passageway 21 is equipped with entry 22, and the other end is equipped with export 23, is equipped with in the pressure release passageway 21 and adjusts plug screw 3 and seal receptacle 4, be equipped with spring 5 between regulation plug screw 3 and the seal receptacle 4, install sealing member 6 on the seal receptacle 4. The sealing member 6 is deformed on the one hand under the action of the spring force for a long time (as shown in fig. 5), and as with the structure shown in fig. 1, because the spring 5 is compressed and deflected (as shown in fig. 6), the deformed part is pressed against the inlet 22, so that the problem that the pressure relief valve is easy to leak when being closed again after being opened or the problem that the pressure relief pressure is lower than the set safety pressure exists; on the other hand, because the contact area between the sealing element 6 and the valve body 2 is large, the sealing element 6 is very easy to adhere to the valve body 2 under the action of the elastic force of the spring 5 for a long time, so that the pressure for pressure relief far exceeds the set safe pressure, normal pressure relief cannot be performed, and potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a pressure relief for water heater. The problems that the spring is deflected and cannot be normally sealed and the pressure is too high can be solved.

In order to achieve the purpose, the utility model provides a technical scheme does:

the utility model relates to a relief valve for water heater, including disk seat and valve body, be equipped with the water channel in the disk seat, the valve body is installed in the water channel, be equipped with in the valve body with the pressure release passageway of water channel intercommunication, the one end of pressure release passageway is equipped with the entry, the other end is equipped with the export, is equipped with regulation plug screw and seal receptacle in the pressure release passageway, be equipped with the spring between regulation plug screw and the seal receptacle, install the sealing member on the seal receptacle, the inner wall of pressure release passageway entrance be coniform, the sealing member is equipped with the circular arc along week and seals the face, the circular arc sealed face cooperatees with the conical.

Preferably, the caliber of the inlet is smaller than the inner diameter of the pressure relief channel.

Preferably, the adjusting screw plug is of a hollow structure and is in threaded connection with the pressure relief channel. The internal hollow structure of the adjusting screw plug is used as an outlet of the pressure relief channel. The adjusting screw plug is mainly suitable for adjusting the elastic force of the spring, so that the pressure of pressure relief is controlled, when the adjusting screw plug is screwed inwards, the spring is compressed, the pressure of the pressure relief is increased, and otherwise, the pressure relief pressure is reduced.

Preferably, one end of the sealing seat, which is close to the spring, is provided with a first protrusion, the other end of the sealing seat is provided with a notch, the spring is sleeved on the first protrusion, and the sealing element is installed in the notch. Through establishing the spring housing on first arch, can reduce the distance of spring skew in the use, guarantee that the sealing member is just to the entrance.

Preferably, one end of the adjusting screw plug, which is close to the spring, is provided with a second protrusion, the spring is sleeved on the second protrusion, and the second protrusion plays a role of the spring mounting seat.

Preferably, the first protrusion and the second protrusion are cylindrical, and the center line of the second protrusion and the center line of the first protrusion are located on the same straight line. The stability of the spring is improved, and therefore the deflection probability of the spring can be reduced.

Preferably, the sealing element is rubber, and the sealing effect is good due to the adoption of the rubber sealing element.

Preferably, the periphery of the valve body connected with the water channel is provided with an annular groove, and a sealing ring is arranged in the annular groove.

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

1. compared with the prior art, the utility model discloses well sealing member improves for the sealed of line and face with the contact seal of face by the face of the contact of valve body, and area of contact is littleer to very big reduction the possibility of adhesion between the two, even there is the adhesion, also can not lead to the pressure release pressure that the relief valve set for to have obvious increase because area of contact is little.

2. Compared with the prior art, the utility model discloses well valve body sealing face is changed into the awl side of ordinary brill processing by original plane, even leads to the fact the sealing member skew because of the spring is out of shape after the pressure release valve opens, nevertheless when resealing, also because of sealing surface is the conical surface automatic realignment center, rectifies the skew to avoid because of the sealing member warp and the problem that takes place to leak when the skew causes to be airtight again under the spring.

Drawings

Fig. 1 is a schematic structural diagram of a pressure release valve for a water heater in the prior art;

FIG. 2 is a schematic diagram showing that the structure of a rubber sealing member of a pressure release valve for a water heater in the prior art is uneven;

FIG. 3 is a schematic illustration of a prior art spring biased pressure relief valve for a water heater;

FIG. 4 is a schematic diagram of a pressure relief valve in the prior art;

FIG. 5 is a schematic diagram showing that the structure of the rubber sealing member of the pressure relief valve in the prior art is uneven;

FIG. 6 is a schematic illustration of a prior art pressure relief valve with spring deflection;

fig. 7 is a schematic structural view of the present invention;

FIG. 8 is an enlarged view of A in FIG. 7;

fig. 9 is a schematic view of pressure relief of the middle pressure relief valve of the present invention;

FIG. 10 is a schematic view of the spring deflection of the present invention;

FIG. 11 is a schematic view of the automatic calibration process after the spring deflection of the present invention;

description of the labels in the schematic:

1-a valve seat; 2-a valve body; 3-adjusting the screw plug; 4-sealing seat; 5-a spring; 6-a seal; 7-sealing ring; 11-a water channel; 21-a pressure relief channel; 22-an inlet; 23-an outlet; 24-an annular groove; 25-cone side; 31-a second protrusion; 41-a first projection; 42-notches; 61-circular arc sealing surface.

Detailed Description

For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.

As shown in fig. 7 and 8, the present embodiment relates to a pressure release valve for a water heater, which includes a valve seat 1 and a valve body 2, wherein a water passage 11 is arranged in the valve seat 1, the valve body 2 is installed in the water passage 11, an annular groove 24 is arranged at a connection position of the valve body 2 and the water passage, and a sealing ring 7 is arranged in the annular groove 24. Be equipped with the pressure release passageway 21 with water channel 11 intercommunication in the valve body 2, the one end of pressure release passageway 21 is equipped with entry 22, and the other end is equipped with export 23, entry 22's bore be less than pressure release passageway 21's internal diameter, be equipped with in the pressure release passageway 21 and adjust plug screw 3 and seal receptacle 4, it is equipped with spring 5 to adjust between plug screw 3 and the seal receptacle 4, install sealing member 6 on the seal receptacle 4, the inner wall of pressure release passageway 21 entrance be coniform, sealing member 6 is equipped with the sealed face of circular arc 61 along week, the sealed face of circular arc 61 cooperatees with the coniform awl lateral surface 25 and seals. The contact of the arc sealing surface 61 and the conical side surface 25 is line-surface contact, and the contact area is smaller, so that the possibility of adhesion between the arc sealing surface and the conical side surface is greatly reduced, and even if adhesion exists, the pressure relief pressure set by the pressure relief valve cannot be obviously increased due to the small contact area. The sealing surface of the valve body 2 is changed from the original plane to the conical side surface processed by a common drill, even if the sealing element deflects due to the deformation of the spring 5 after the pressure relief valve is opened, the sealing surface is a conical surface and automatically realigns the center to correct the deflection during resealing, thereby avoiding the leakage problem caused by the deformation of the sealing element and the deflection under the spring during resealing.

The adjusting screw plug 3 is of a hollow structure, and the adjusting screw plug 3 is in threaded connection with the pressure relief channel 21. The inner hollow structure of the adjusting screw plug 3 serves as an outlet of the pressure relief passage 21. The adjusting screw plug 3 is mainly suitable for adjusting the elastic force of the spring 5, so that the pressure of pressure relief is controlled, when the adjusting screw plug 3 is screwed inwards, the spring 5 is compressed, the pressure of pressure relief is increased, and otherwise, the pressure relief pressure is reduced.

One end of the sealing seat 4 close to the spring 5 is provided with a first protrusion 41, the other end of the sealing seat is provided with a notch 42, the spring 5 is sleeved on the first protrusion 41, the sealing element 6 is arranged in the notch 42, and the sealing element 6 is made of rubber. One end of the adjusting screw plug 3 close to the spring is provided with a second bulge 31, and two ends of the spring 5 are respectively sleeved on the first bulge 41 and the second bulge 31, so that the deflection distance of the spring 5 in the use process can be reduced, and the sealing element 6 is ensured to be opposite to an inlet. The second protrusion 31 functions as a spring mount. The first protrusion 41 and the second protrusion 31 are cylindrical, and the center line of the second protrusion 31 and the center line of the first protrusion 41 are located on the same straight line. The stability of the spring 5 is improved, and the probability of the spring deviating from 5 can be reduced.

The utility model discloses a theory of operation is:

when the water pressure in the water passage 11 is too high, the water pressure is greater than the elastic force of the spring 5, and the sealing member 6 is pushed open by the water pressure in the water passage 11, and is decompressed in the direction indicated by the arrow in fig. 9. After the pressure is released, the pressure of the water pressure in the water channel 11 is smaller than the elastic force of the spring 5, under normal conditions, the spring 5 pushes the sealing element 6 back, and the arc sealing surface 61 at the front end of the sealing element 6 is simultaneously contacted with the conical side surface (the simultaneous contact here means that all directions of the arc sealing surface 61 are simultaneously contacted with the conical side surface 25).

If the spring 5 deflects, the sealing element 6 will close eccentrically back, the circular arc sealing surface of the sealing element 6 in the eccentric direction will first contact with the conical side surface (as shown in fig. 10), and at this time, under the elastic force of the spring 5, there will be a forward thrust on the sealing element 6, and together with a self-centering action of the cone, the sealing element 6 will automatically move towards the middle (as shown in fig. 11), and finally return to the initial state.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is merely an embodiment of the present invention, and the actual structure is not limited thereto. Therefore, those skilled in the art should understand that they can easily and effectively implement the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a relief valve for water heater, includes disk seat and valve body, is equipped with the water passageway in the disk seat, and the valve body is installed in the water passageway, is equipped with the pressure release passageway that communicates with the water passageway in the valve body, and the one end of pressure release passageway is equipped with the entry, and the other end is equipped with the export, is equipped with regulation plug screw and seal receptacle in the pressure release passageway, be equipped with the spring between regulation plug screw and the seal receptacle, install sealing member, its characterized in that on the seal receptacle: the inner wall of the inlet of the pressure relief channel is conical, the sealing element is circumferentially provided with an arc sealing surface, and the arc sealing surface is matched and sealed with the conical side surface.

2. The pressure relief valve for a water heater according to claim 1, wherein: the caliber of the inlet is smaller than the inner diameter of the pressure relief channel.

3. The pressure relief valve for a water heater according to claim 1, wherein: the adjusting screw plug is of a hollow structure and is in threaded connection with the pressure relief channel.

4. The pressure relief valve for a water heater according to claim 1, wherein: one end of the sealing seat, which is close to the spring, is provided with a first bulge, the other end of the sealing seat is provided with a notch, one end of the spring is sleeved on the first bulge, and the sealing element is installed in the notch.

5. The pressure relief valve for a water heater according to claim 4, wherein: one end of the adjusting screw plug, which is close to the spring, is provided with a second bulge, and the other end of the spring is sleeved on the second bulge.

6. The pressure relief valve for a water heater according to claim 5, wherein: the first bulge and the second bulge are cylindrical, and the center line of the second bulge and the center line of the first bulge are positioned on the same straight line.

7. The pressure relief valve for a water heater according to claim 1, wherein: the sealing element is made of rubber.

8. The pressure relief valve for a water heater according to claim 1, wherein: the joint of the valve body and the water channel is provided with an annular groove, and a sealing ring is arranged in the annular groove.