CN210440635U

CN210440635U - Pressure reducing valve for water heater

Info

Publication number: CN210440635U
Application number: CN201921149407.5U
Authority: CN
Inventors: 徐伟峰; 董瑜
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-05-01
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a pressure reducing valve for a water heater, which can be applied to the water heater in a water supply system and comprises a valve body, a valve cover, a valve core, a valve clack and the like, wherein the valve core is axially and movably sealed and arranged in the valve body; a water inlet hole which is axially communicated is formed in the spring seat; therefore, when the valve core is matched by the pressure change in the water heater and the elastic pushing of the elastic element, the valve core can axially reciprocate to drive the valve clack to seal and open and close the water inlet hole, so that the function of preventing the overlarge pressure in the water heater is achieved; the improved structure adopts the working mode that the valve core moves and the spring seat is not moved, so that the structure design is simpler, the manufacturing cost is effectively reduced, the smaller appearance volume can be realized, and the safety use performance is higher.

Description

Pressure reducing valve for water heater

Technical Field

The utility model relates to a relief pressure valve among the pipeline valve door specifically indicates a relief pressure valve for water heater.

Background

The pressure reducing valve is a pipeline valve which reduces the inlet pressure to a certain required outlet pressure through regulation and relies on the energy of the medium, so that the outlet pressure is automatically kept stable. Along with the advance of domestic urbanization in recent years, in the fields of various high-rise buildings, equipment matching and the like, the application of the pressure reducing valve is more and more extensive, the traditional pressure reducing valve adopts a diaphragm type pressure reducing structure or a piston type pressure reducing structure, the diaphragm type pressure reducing structure has the defects of complex structure, large volume, high manufacturing cost and the like, the piston type pressure reducing structure not only has the using defects, but also has the using defects of poor using reliability and the like because the structural form is similar to an opening and closing pressure reducing mode that a piston head is driven by a piston rod to move, particularly, the pressure reducing valve commonly used in the existing water heater has higher requirement on using safety, and the pressure reducing valve manufactured by adopting the traditional piston type pressure reducing structure is difficult to meet the using requirements of small and exquisite structure, low cost and safe use of.

Disclosure of Invention

The technical problem to be solved in the utility model is to overcome the defects of the prior art and provide a pressure reducing valve for water heater with simple structure, small volume, low manufacturing cost and high safety performance.

The technical problem of the utility model is realized through following technical scheme:

a kind of pressure reducing valve for water heater, including valve block, seal the valve bonnet installed in entrance point of valve block, valve core and valve clack installed in valve core in the valve block, the said valve core is installed in the valve block movably and hermetically axially, there is a spring seat whose lower end is connected to the entrance point of valve bonnet in the said valve bonnet, the upper end is movably sealed and stretched into the valve core, there are elastic elements pushed each other between valve seat and valve core; a water inlet hole which is axially communicated is formed in the spring seat; the valve core is matched with the pressure change in the water heater and the elastic pushing of the elastic element to axially reciprocate, so as to drive the valve clack to seal and open and close the water inlet hole.

The valve core is internally provided with a mounting hole and a water through hole which are positioned at the upper part, an annular cavity which is positioned at the middle part and a movable hole which is positioned at the lower part, the valve clack is fixedly arranged in the mounting hole, the lower end surface of the valve clack extends into the annular cavity, the upper end of the spring seat movably and hermetically extends into the movable hole, and the water inlet hole, the annular cavity and the water through hole are mutually communicated.

The valve body is internally provided with a limiting inner shoulder for limiting the axial upward movement of the valve core.

The elastic element is sleeved outside the spring seat, the lower end of the elastic element is arranged on an outer shoulder at the lower end of the spring seat in a pushing mode, and the upper end of the elastic element is arranged on an outer shoulder at the lower end of the valve core in a pushing mode.

The elastic element is arranged in an installation cavity formed by the spring seat, the valve cover and the valve core together, and the valve cover is provided with vent holes respectively communicated with the outside and the installation cavity.

The valve clack is screwed in the mounting hole by the valve seat thread and is fixed by glue; the lower end of the spring seat is screwed in the inlet end of the valve cover through threads and is fixed by glue, and an O-shaped sealing ring is arranged between the lower end of the spring seat and the inlet end of the valve cover.

An O-shaped sealing ring is arranged on the outer circumferential surface of the valve core and is in dynamic sealing contact with the inner wall of the valve body; an O-shaped sealing ring is arranged on the outer circumferential surface of the upper end of the spring seat and is in dynamic sealing contact with the wall of the movable hole.

The mounting hole is arranged on the axis of the valve core, the water through holes are provided with a plurality of water through holes, and the plurality of water through holes are uniformly distributed on the circumference by taking the mounting hole as the circle center.

The outer circumferential surfaces of the valve body and the valve cover are provided with parallel grooves.

Compared with the prior art, the utility model mainly improves the piston type pressure reducing structure of the traditional pressure reducing valve, the structure of the pressure reducing valve is composed of a spring seat, an elastic element and a valve core which is correspondingly improved, the valve core is axially and movably sealed and arranged in the valve body, the lower end of the spring seat is hermetically connected with the inlet end of the valve cover, the upper end of the spring seat movably seals and extends into the valve core, the elastic element is mutually pushed and arranged between the spring seat and the valve core, and the spring seat is internally provided with an axially through water inlet hole; therefore, when the valve core is matched by the pressure change in the water heater and the elastic pushing of the elastic element, the valve core can axially reciprocate to drive the valve clack to seal and open and close the water inlet hole, so that the function of preventing the overlarge pressure in the water heater is achieved; the improved structure adopts the working mode that the valve core moves and the spring seat is not moved, so that the structure design is simpler, the manufacturing cost is effectively reduced, the smaller appearance volume can be realized, and the safety use performance is higher.

Drawings

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

Fig. 2 is an exploded external view of fig. 1.

Fig. 3 is a schematic sectional view of the valve body.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 to 3, the valve comprises a valve cover 1, a vent hole 11, a parallel groove 12, a spring seat 2, a water inlet hole 21, an elastic element 3, a valve core 4, a water through hole 41, a mounting hole 42, a ring cavity 43, a movable hole 44, a valve clack 5, a valve seat 6, a sealing gasket 7, a valve body 8, an outlet end 81, an O-shaped sealing ring 9 and a mounting cavity 10.

A pressure reducing valve for a water heater is structurally mainly composed of a valve body 8, a valve cover 1, a valve core 4, a spring seat 2, a valve clack 5, an elastic element 3 and the like, the pressure reducing valve is described in detail in a vertical placement mode in the embodiment, the valve body 8 is an axially through tubular component as shown in the figure 1, an arrow marked outside the valve body is shown, the upper end of the view of the figure 1 is obviously an outlet end 81 of the valve body, a sealing gasket 7 is arranged in the valve body to facilitate sealing when the pressure reducing valve is in threaded connection with the water heater, the lower end of the view of the figure 1 is obviously an inlet end of the valve body 8, the upper end of the valve cover 1 is installed at the inlet end of the valve body 8 in a threaded connection mode, and the valve cover is fixed by glue to ensure connection sealing performance between the valve body and the valve body 8.

Meanwhile, the valve cover 1 is axially communicated and communicated with the valve body 8 on the same axis, and parallel grooves 12 are formed in the outer circumferential surfaces of the valve body 8 and the valve cover 1 and used for facilitating clamping and screwing of a wrench when the valve cover is installed on a pipeline.

The valve core 4 is axially and movably arranged in the valve body 8 in a sealing manner, namely the valve core 4 is movably arranged in the valve body 8 in a lifting manner as shown in figure 1, so that an O-shaped sealing ring 9 is arranged on the outer circumferential surface of the valve core 4 and is required to be in movable sealing contact with the inner wall of the valve body 8; and a limiting inner shoulder used for limiting the axial upward movement of the valve plug shaft 4 is arranged in the valve body 8.

The valve core 4 is internally provided with an installation hole 42 and a water through hole 41 which are positioned at the upper part, an annular cavity 43 positioned at the middle part and a movable hole 44 positioned at the lower part as shown in figure 3.

Wherein, the mounting hole 42 is arranged on the axis of the valve core 4, the number of the water through holes 41 is selected according to the actual use requirement, and the water through holes 41 are uniformly distributed on the circumference by taking the mounting hole 42 as the center of a circle; the valve clack 5 is fixedly installed in the installation hole 42, and specifically comprises the following components: the valve clack 5 is arranged in the mounting hole 42 from top to bottom for positioning, then the valve seat 6 is screwed in the mounting hole 42 by screw threads and fixed by glue, namely the valve clack 5 is also fixed, and the lower end face of the valve clack 5 at the moment just extends into the annular cavity 43 to be exposed.

The lower end of the spring seat 2 is screwed in the inlet end of the valve cover 1 through threads and is fixed by glue, and an O-shaped sealing ring 9 is arranged between the lower end of the spring seat 2 and the inlet end of the valve cover 1 to realize connection and sealing; the movable seal at the upper end of the spring seat 2 extends into the movable hole 44 of the valve core 4, so that an O-shaped sealing ring 9 is arranged on the outer circumferential surface of the upper end of the spring seat 2, and the O-shaped sealing ring needs to be in movable sealing contact with the hole wall of the movable hole 44.

An elastic element 3 which is pushed and compressed mutually is arranged between the spring seat 2 and the valve core 4, the elastic element is arranged in an installation cavity 10 which is formed by the spring seat 2, the valve cover 1 and the valve core 4 together, and the valve cover 1 is also provided with vent holes 11 which are respectively communicated with the outside and the installation cavity 10 so as to ensure that the internal pressure and the external pressure are consistent; the elastic element 3 is sleeved outside the spring seat 2, the lower end of the elastic element 3 is arranged on an outer shoulder at the lower end of the spring seat 2 in a pushing mode, and the upper end of the elastic element 3 is arranged on an outer shoulder at the lower end of the valve core 4 in a pushing mode.

In addition, an axially through water inlet hole 21 is arranged in the spring seat 2, and the water inlet hole, the annular cavity 43 and the water through hole 41 are communicated with each other; therefore, the valve core 4 is matched with the pressure change in the water heater and the elastic pushing of the elastic element 3 to make axial reciprocating movement, and further drives the valve clack 5 to open and close the water inlet hole 21 in a sealing way, specifically: the medium sequentially passes through the water inlet 21, the annular cavity 43 and the water through hole 41 to reach the inside of the water heater, once the pressure in the water heater is overlarge, the water pressure reaching a set value can push the valve core 4 to move downwards, and overcome the elasticity of the elastic element 3 to enable the valve clack 5 to be in sealing contact with the upper end of the spring seat 2, namely, the water inlet 21 is sealed and closed, so that the function of preventing the overlarge pressure is achieved, and the water heater belongs to an indispensable safety guarantee during working.

The utility model discloses mainly improve the piston decompression structure to traditional relief pressure valve, the structure after the improvement is owing to adopt that case 4 removes and spring holder 2 motionless working method, so not only structural design is simpler, manufacturing cost has effectively been reduced, can accomplish more small and exquisite appearance volume moreover, whole size is equivalent with vertical check valve, need not adjust after the installation, practice thrift a large amount of installation space, and still have higher safety performance, so can extensively be applicable to in the domestic hot water system.

The above description is only an embodiment of the present invention, and it should be understood by those skilled in the art that any structural design equivalent to this embodiment is included in the scope of the present invention.

Claims

1. A pressure reducing valve for a water heater comprises a valve body (8), a valve cover (1) hermetically arranged at an inlet end of the valve body, a valve core (4) in the valve body (8) and a valve clack (5) arranged in the valve core, and is characterized in that the valve core (4) is axially and movably and hermetically arranged in the valve body (8), a spring seat (2) with the lower end hermetically connected at the inlet end of the valve cover and the upper end movably and hermetically extending into the valve core (4) is arranged in the valve cover (1), and an elastic element (3) which pushes each other is also arranged between the spring seat and the valve core (4); a water inlet hole (21) which is axially communicated is formed in the spring seat (2); the valve core (4) is matched with the pressure change in the water heater and the elastic pushing of the elastic element (3) to axially reciprocate, so as to drive the valve clack (5) to open and close the water inlet hole (21) in a sealing way.

2. The pressure reducing valve for the water heater according to claim 1, wherein the valve core (4) is internally provided with a mounting hole (42) and a water through hole (41) which are positioned at the upper part, an annular cavity (43) which is positioned at the middle part and a movable hole (44) which is positioned at the lower part, the valve clack (5) is fixedly arranged in the mounting hole (42), the lower end surface of the valve clack (5) extends into the annular cavity (43), the upper end of the spring seat (2) movably and hermetically extends into the movable hole (44), and the water inlet hole (21), the annular cavity (43) and the water through hole (41) are communicated with each other.

3. The pressure reducing valve for the water heater as claimed in claim 1, wherein a limiting inner shoulder for limiting the axial upward movement of the valve core (4) is arranged in the valve body (8).

4. The pressure reducing valve for the water heater as claimed in claim 1, wherein the elastic element (3) is sleeved outside the spring seat (2), the lower end of the elastic element is arranged on an outer shoulder at the lower end of the spring seat (2) in a pushing manner, and the upper end of the elastic element (3) is arranged on an outer shoulder at the lower end of the valve core (4) in a pushing manner.

5. The pressure reducing valve for the water heater according to claim 4, wherein the elastic element (3) is arranged in an installation cavity (10) formed by the spring seat (2), the valve cover (1) and the valve core (4) together, and the valve cover (1) is provided with vent holes (11) respectively communicated with the outside and the installation cavity (10).

6. A pressure-reducing valve for a water heater according to claim 2, characterised in that the valve flap (5) is screwed into the mounting hole (42) by the valve seat (6) and is fixed by glue; the lower end of the spring seat (2) is screwed in the inlet end of the valve cover (1) through threads and is fixed by glue, and an O-shaped sealing ring (9) is arranged between the lower end of the spring seat (2) and the inlet end of the valve cover (1).

7. The pressure reducing valve for the water heater as claimed in claim 2, wherein the outer circumferential surface of the valve core (4) is provided with an O-shaped sealing ring (9), and the O-shaped sealing ring is in dynamic sealing contact with the inner wall of the valve body (8); an O-shaped sealing ring (9) is arranged on the outer circumferential surface of the upper end of the spring seat (2), and the O-shaped sealing ring is in dynamic sealing contact with the hole wall of the movable hole (44).

8. The pressure reducing valve for the water heater as claimed in claim 2, wherein the mounting hole (42) is formed on an axial line of the valve core (4), the water passing holes (41) are provided in plurality, and the water passing holes are circumferentially and uniformly distributed around the mounting hole (42).

9. A pressure reducing valve for a water heater according to claim 1, wherein the valve body (8) and the valve cover (1) are provided with parallel grooves (12) on the outer circumferential surfaces thereof.