CN218207935U

CN218207935U - Constant temperature water mixing valve with soft sealing structure

Info

Publication number: CN218207935U
Application number: CN202221588719.8U
Authority: CN
Inventors: 张文鞍
Original assignee: Zhuhai Edison Ecotech Corp
Current assignee: Zhuhai Edison Ecotech Corp
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-01-03
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a water valve is mixed to constant temperature with soft seal structure, include: the water mixing valve body is provided with a piston in an inner cavity; soft seal structure, it includes annular groove, packing ring and packing ring fixing base, annular groove with the ladder form in lower extreme position places the packing ring in the annular groove, the coaxial packing ring fixing base of placing in the packing ring, the internal diameter of packing ring and the external diameter interference fit of packing ring fixing base, the up end of packing ring forms the contact surface of piston, the packing ring is soft material. When the cold water supply fails suddenly, the soft sealing structure can enable the two contact surfaces for controlling the flow of the hot water to be closed tightly, so that the user is prevented from being scalded by delayed closing or untight closing of the two contact surfaces, and the soft sealing structure is fixed on the constant-temperature water mixing valve body and can be used repeatedly without falling off easily.

Description

Constant temperature water mixing valve with soft sealing structure

Technical Field

The utility model relates to a constant temperature mixes water valve. More specifically, the utility model relates to a constant temperature mixes water valve with soft seal structure.

Background

With the improvement of living standard of people, most of domestic water valves adopt constant-temperature water mixing valves. The two contact surfaces of the existing thermostatic mixing valve for controlling the flow of cold water and hot water are usually hard surfaces, when the flatness and parallelism of one or two contact surfaces are not high enough, or the contact surfaces have small impurities, the two contact surfaces are not tightly matched, so that the hot water is not closed tightly or is closed in a delayed way, and especially when the cold water supply fails suddenly, if the mixing valve cannot close the hot water immediately, a user can be scalded. Although some thermostatic water mixing valves are provided with gaskets on two contact surfaces, the gaskets are simply fixed on the two contact surfaces, and the gaskets are easy to fall off along with the increase of the opening and closing times of the contact surfaces.

SUMMERY OF THE UTILITY MODEL

The utility model provides a constant temperature mixes water valve with soft seal structure, it can close the hot water rapidly when the cold water supply became invalid suddenly, and soft seal structure fixes on mixing the water valve body, is difficult for droing.

To achieve these objects and other advantages in accordance with the purpose of the invention, a thermostatic water mixing valve having a soft sealing structure is provided. The method comprises the following steps:

the water mixing valve body is provided with an upper limit part and a lower limit part, wherein the upper limit part limits the upward continuous movement of the piston, and the lower limit part limits the downward continuous movement of the piston.

Soft seal structure, it includes annular groove, packing ring and packing ring fixing base, annular groove with the ladder form in lower limit position places the packing ring in the annular groove, the coaxial packing ring fixing base of placing in the packing ring, the internal diameter of packing ring and the external diameter interference fit of packing ring fixing base, the up end of packing ring forms the contact surface of piston, the packing ring is soft material.

Preferably, the opening at the top of the water mixing valve body is provided with a special-shaped nut and a bolt which are in threaded connection, and the lower end face of the special-shaped nut forms the upper limit part.

Preferably, the outer wall of the middle part of the water mixing valve body is provided with a cold water inlet and a hot water inlet, the inner wall of the lower part of the water mixing valve body forms a mixed water cavity, the hot water inlet is communicated with the mixed water cavity through a gap between the piston and the gasket, and the cold water inlet is communicated with the mixed water cavity through a gap between the piston and the special-shaped nut.

Preferably, the middle part of the piston is coaxially provided with an inner ring, a partition plate is arranged between the inner ring and the inner wall of the piston, a gap is formed between the partition plates, a cold water inlet space is formed from a cold water inlet to the lower end face of the bolt and the upper end face of the partition plate, and a hot water inlet space is formed from a hot water inlet to the outer wall of the lower part of the piston and the gasket.

Preferably, a thermal bulb assembly is arranged in the water mixing valve body and comprises a thermal bulb, a thermal bulb ejector rod and a guide sleeve, the upper portion of the thermal bulb is fixedly connected with the guide sleeve, the lower portion of the thermal bulb ejector rod is rotatably connected with the guide sleeve, the guide sleeve is fixedly connected with the inner ring, the upper portion of the thermal bulb ejector rod extends into a groove in the lower portion of a bolt and is in contact with the bottom surface of the groove, a temperature sensing portion of the thermal bulb extends into the mixed water cavity, a step surface is formed at the joint of the guide sleeve and the thermal bulb, a flow guide sleeve is sleeved on the periphery of the thermal bulb, a water passing space is formed on the upper end surface of the flow guide sleeve, the upper end surface of the flow guide sleeve is in contact with the step surface, a reset spring is sleeved between the outer wall of the flow guide sleeve and the washer fixing seat, and the step surface formed on the outer wall of the flow guide sleeve is in contact with the upper end surface of the reset spring.

Preferably, the guide sleeve is provided with an external thread which is relatively fixedly connected with an internal thread of the inner ring.

The utility model discloses at least, include following beneficial effect:

firstly, a piston in a constant-temperature water mixing valve body isolates cold water and hot water from entering, and controls the flow proportion of the cold water and the hot water entering the constant-temperature water mixing valve through the up-and-down movement of the piston to control the water outlet temperature; when the cold water supply became invalid suddenly, soft seal structure can make two contact surfaces of control hot water flow closely closed and then close the hot water, prevents that two contact surfaces from postponing closed or closed not tight scald user, and this soft seal structure fixes on the constant temperature mixes water valve body, can use repeatedly and be difficult for droing: the gasket made of soft materials is in contact with the piston, the upper end surface of the gasket can generate corresponding deformation along with the shape of the lower end surface of the piston, the matching requirement of the lower end surface of the piston is met, and when the planeness or parallelism of the two contact surfaces is not high enough or the contact surfaces contain tiny impurities, the upper end surface of the gasket can generate corresponding deformation, so that the two contact surfaces are sealed; the packing ring sets up in the annular groove of constant temperature water mixing valve body inner wall, and the annular groove has the fixed action to the packing ring, prevents that the packing ring from droing, and the packing ring fixing base plays supporting role to the packing ring, and the interference fit design of packing ring internal diameter and packing ring fixing base external diameter makes the packing ring tightly overlap on the packing ring fixing base, prevents that the packing ring from droing at two in-process that contact face used repeatedly, and makes and seal between packing ring and the packing ring fixing base.

And secondly, an inner ring is arranged in the middle of the piston, partition plates are arranged between the inner ring and the inner wall of the piston, gaps are formed among the partition plates, and cold water can flow into the mixed water cavity from the gaps among the partition plates.

Thirdly, when the temperature of the mixed water is changed by external interference, the temperature sensing part of the thermal bulb expands or contracts along with the rising or the lowering of the temperature of the mixed water, so that the thermal bulb ejector rod extends or retracts, the thermal bulb assembly is driven to move downwards or upwards, and the piston is driven to move downwards or upwards, so that the gap between two contact surfaces for controlling the flow of cold water is increased or reduced, the gap between two contact surfaces for controlling the flow of hot water is reduced or increased, the water inlet proportion of the cold water and the hot water is adjusted, and the purpose of keeping the mixed water temperature constant is achieved.

Fourthly, the flow guide sleeve enables the mixed water to flow close to the temperature sensing part of the thermal bulb, and the sensitivity of the temperature sensing part of the thermal bulb is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a technical solution of the present invention;

fig. 2 is a schematic view of the soft sealing structure of the present invention;

fig. 3 is a schematic structural view of the thermal bulb assembly, the piston, the flow guide sleeve, the return spring and the washer holder of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

As shown in fig. 1 and 2, the utility model provides a constant temperature mixes water valve with soft seal structure, include:

the water mixing valve comprises a water mixing valve body 1, wherein a piston 2 is arranged in an inner cavity of the water mixing valve body 1, and the water mixing valve body 1 is provided with an upper limit part for limiting the piston 2 to move upwards continuously and a lower limit part for limiting the piston 2 to move downwards continuously. The piston 2 can move up and down, and gaps are formed between the piston 2 and the upper limit part and between the piston 2 and the lower limit part. The gap between the piston 2 and the upper limit part controls the flow of cold water entering the water mixing valve, when the piston 2 moves upwards, the gap between the piston 2 and the upper limit part is reduced, the inflow of the cold water is reduced, and when the piston 2 moves upwards to be in contact with the upper limit part, the piston 2 stops moving upwards, and the supply of the cold water is stopped; the gap between the piston 2 and the lower limit part controls the flow of hot water entering the water mixing valve, when the piston 2 moves downwards, the gap between the piston 2 and the lower limit part is reduced, the inflow of the hot water is reduced, and when the piston 2 moves downwards to be in contact with the lower limit part, the piston 2 stops moving downwards, and the hot water supply is stopped.

Soft seal structure, it includes annular groove 3, packing ring 4 and packing ring fixing base 5, annular groove 3 with the ladder form in lower limit position places packing ring 4 in the annular groove 3, and coaxial packing ring fixing base 5 of placing in the packing ring 4, the internal diameter of packing ring 4 and packing ring fixing base 5's external diameter interference fit, the up end 7 of packing ring 4 forms piston 2 touches the face of connecting, packing ring 4 is soft material. Annular groove 3 has been seted up to 1 inner wall of muddy water valve body, places packing ring 4 in the annular groove 3, and coaxial placing packing ring fixing base 5 in the packing ring 4, the internal diameter of packing ring 4 and the external diameter of packing ring fixing base 5 pass through interference fit's design, and packing ring 4 tightly overlaps on packing ring fixing base 5, and the up end 7 of packing ring 4 forms the contact surface of piston 2, makes simultaneously sealed between packing ring 4 and the packing ring fixing base 5. The gasket 4 is arranged in the annular groove 3 formed in the inner wall of the water mixing valve body 1, so that the stability of the gasket 4 is further improved, and the gasket 4 is prevented from falling off in the repeated use process. When the piston 2 moves to the lower limit part, the lower end face 15 of the piston 2 is in contact with the upper end face 7 of the gasket 4, the gasket 4 is made of elastic soft material, the upper end face 7 of the gasket 4 deforms in a shape matched with the lower end face 15 of the piston 2, and when the planeness or parallelism of the two contact faces is not high enough or small impurities exist in the contact faces, the upper end face 7 of the gasket 4 can still deform correspondingly, so that the two contact faces are sealed.

In the technical scheme, the size of inflow of cold water and hot water is controlled by the up-and-down movement of the piston 2; when the cold water supply fails suddenly, the soft sealing structure can quickly and tightly close the two contact surfaces for controlling the flow of the hot water, so as to prevent the hot water from being closed untight or delaying the closing to scald a user; the packing ring 4 sets up between annular groove 3 and packing ring fixing base 5, and annular groove 3 and packing ring fixing base 5 have the fixed support effect to packing ring 4, prevent that packing ring 4 from droing at the in-process that two contact surfaces touched repeatedly.

According to the further technical scheme, a special-shaped nut 9 and a bolt 10 which are in threaded connection are arranged at the opening 8 at the top of the water mixing valve body 1, and the lower end face 11 of the special-shaped nut 9 forms the upper limit part. The top opening 8 of the water mixing valve body 1 is in threaded connection with the external thread of the special-shaped nut 9, the special-shaped nut 9 is fixed at the top opening 8 of the water mixing valve body 1, the lower end face 11 of the special-shaped nut 9 is an upper limit position, the special-shaped nut 9 is provided with an internal thread and is connected with the bolt 10, and the bolt 10 can move up and down in the special-shaped nut 9.

According to a further technical scheme, the outer wall of the middle of the water mixing valve body 1 is provided with a cold water inlet 12 and a hot water inlet 13, the inner wall of the lower portion of the water mixing valve body 1 forms a mixed water cavity 14, the hot water inlet 13 is communicated with the mixed water cavity 14 through a gap between the piston 2 and the gasket 4, and the cold water inlet 12 is communicated with the mixed water cavity 14 through a gap between the piston 2 and the special-shaped nut 9. Cold water enters the mixed water cavity 14 through a cold water inlet 12 and a gap between the upper end face 6 of the piston 2 and the lower end face 11 of the special-shaped nut 9, and hot water enters the mixed water cavity 14 through a hot water inlet 13 and a gap between the lower end face 15 of the piston 2 and the upper end face 7 of the gasket 4. When the piston 2 moves upwards, the gap between the upper end surface 6 of the piston 2 and the lower end surface 11 of the special-shaped nut 9 is reduced, the gap between the lower end surface 15 of the piston 2 and the upper end surface 7 of the gasket 4 is increased, the inflow of cold water is reduced, the inflow of hot water is increased, and the temperature of mixed water is increased; when the piston 2 moves downwards, the gap between the upper end surface 6 of the piston 2 and the lower end surface 11 of the special-shaped nut 9 is increased, the gap between the lower end surface 15 of the piston 2 and the upper end surface 7 of the gasket 4 is reduced, the inflow amount of cold water is increased, the inflow amount of hot water is reduced, and the temperature of mixed water is reduced.

According to the further technical scheme, an inner ring 16 is coaxially arranged in the middle of the piston 2, a partition plate 17 is arranged between the inner ring 16 and the inner wall of the piston 2, a gap is formed between the partition plates 17, a cold water inlet space is formed from a cold water inlet 12 to the lower end face of the bolt 10 and the upper end face of the partition plate 17, and a hot water inlet space is formed from a hot water inlet 13 to the outer wall of the lower portion of the piston 2 and the gasket 4. Cold water flows into the cold water inlet space through the cold water inlet 12, and the cold water in the cold water inlet space flows into the mixed water cavity 14 through gaps among the partition plates 17; hot water flows into the hot water inlet space through the hot water inlet 13, and the hot water in the hot water inlet space flows into the mixed water chamber 14 through a gap between the lower end surface 15 of the piston 2 and the upper end surface 7 of the gasket 4.

According to a further technical scheme, as shown in fig. 3, a thermal bulb assembly is arranged inside the water mixing valve body 1 and comprises a thermal bulb 19, a thermal bulb ejector rod 20 and a guide sleeve 18, the upper portion of the thermal bulb 19 is fixedly connected with the guide sleeve 18, the lower portion of the thermal bulb ejector rod 20 is rotatably connected with the guide sleeve 18, the guide sleeve 18 is fixedly connected with the inner ring 16, the upper portion of the thermal bulb ejector rod 20 extends into a groove 22 in the lower portion of the bolt 10 and is in contact with the bottom surface of the groove 22, a temperature sensing portion of the thermal bulb 19 extends into the mixed water cavity 14, a step surface 23 is formed at the connection portion of the guide sleeve 18 and the thermal bulb 19, a flow guide sleeve 25 is sleeved on the periphery of the thermal bulb 19, an upper end surface 24 of the flow guide sleeve 25 forms a water passing space, an upper end surface 24 of the flow guide sleeve 25 is in contact with the step surface 23, a return spring 26 is sleeved between the outer wall of the flow guide sleeve 25 and the washer fixing seat 5, and the step surface 21 formed by the outer wall of the flow guide sleeve 25 is in contact with the upper end surface of the return spring 26. The upper part of the bulb-warming ejector rod 20 extends into the groove 22 at the lower part of the bolt 10 and is in contact with the bottom surface of the groove 22, when the bolt 10 moves downwards, the bolt 10 drives the bulb-warming assembly to move downwards, and further drives the piston 2 to move downwards; when the bolt 10 moves upwards, the thermal bulb assembly moves upwards under the elastic force of the return spring 26, and the piston 2 is driven to move upwards. When the temperature of the mixed water rises under the external interference, the temperature sensing part of the thermal bulb 19 expands to enable the thermal bulb ejector rod 20 to extend out, and because the bolt 10 does not move at the moment, the extending thermal bulb ejector rod 20 enables the thermal bulb assembly to move downwards to further drive the piston 2 to move downwards, the gap between the lower end face 15 of the piston 2 and the upper end face 7 of the gasket 4 is reduced, the gap between the upper end face 6 of the piston 2 and the lower end face 11 of the special-shaped nut 9 is increased, the inflow of hot water is reduced, the inflow of cold water is increased, and the temperature of the mixed water is reduced; when the temperature of the mixed water is reduced under external interference, the temperature sensing part of the thermometer bulb 19 contracts to enable the thermometer bulb ejector rod 20 to be retracted, the thermometer bulb component is enabled to move upwards, the piston 2 is further driven to move upwards, the gap between the lower end face 15 of the piston 2 and the upper end face 7 of the gasket 4 is increased, the gap between the upper end face 6 of the piston 2 and the lower end face 11 of the special-shaped nut 9 is reduced, the inflow of hot water is increased, the inflow of cold water is reduced, the temperature of the mixed water is increased, and the function of keeping the mixed water at a constant temperature is achieved. When the cold water supply fails suddenly, the temperature of the mixed water rises, the temperature sensing part of the thermal bulb 19 heated expands rapidly to enable the thermal bulb ejector rod 20 to extend rapidly, the piston 2 is driven to move downwards until the lower end face 15 of the piston 2 contacts with the upper end face 7 of the gasket 4, the hot water supply is stopped, and then the hot water is closed to avoid scalding a user. The flow guide sleeve 25 is sleeved outside the thermal bulb 19, so that the mixed water is close to the temperature sensing part of the thermal bulb 19, and the sensitivity of the thermal bulb 19 is increased.

In a further technical scheme, the guide sleeve 18 is provided with an external thread which is relatively fixedly connected with an internal thread of the inner ring 16. The guide sleeve 18 is relatively fixedly connected with the inner ring 16 of the piston 2, so that the piston 2 is driven by the thermal bulb component to move up and down.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. Constant temperature mixes water valve with soft seal structure, its characterized in that includes:

the water mixing valve comprises a water mixing valve body, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the inner cavity of the water mixing valve body is provided with a piston, and the water mixing valve body is provided with an upper limit part for limiting the upward continuous movement of the piston and a lower limit part for limiting the downward continuous movement of the piston;

soft seal structure, it includes annular groove, packing ring and packing ring fixing base, annular groove with the ladder form in lower extreme position places the packing ring in the annular groove, the coaxial packing ring fixing base of placing in the packing ring, the internal diameter of packing ring and the external diameter interference fit of packing ring fixing base, the up end of packing ring forms the contact surface of piston, the packing ring is soft material.

2. The thermostatic mixing valve with the soft sealing structure according to claim 1, characterized in that a special-shaped nut and a bolt which are screwed are arranged at the top opening of the mixing valve body, and the lower end face of the special-shaped nut forms the upper limit part.

3. The thermostatic mixing valve with the soft sealing structure according to claim 2, wherein the outer wall of the middle part of the mixing valve body is provided with a cold water inlet and a hot water inlet, the inner wall of the lower part of the mixing valve body forms a mixing water chamber, the hot water inlet is communicated with the mixing water chamber through a gap between the piston and the gasket, and the cold water inlet is communicated with the mixing water chamber through a gap between the piston and the special-shaped nut.

4. The thermostatic mixing valve with the soft sealing structure according to claim 3, wherein an inner ring is coaxially arranged in the middle of the piston, a partition plate is arranged between the inner ring and the inner wall of the piston, a gap is formed between the partition plates, a cold water inlet space is formed from the cold water inlet to the lower end face of the bolt and the upper end face of the partition plate, and a hot water inlet space is formed from the hot water inlet to the outer wall of the lower part of the piston and the gasket.

5. The thermostatic water mixing valve with the soft sealing structure according to claim 4, wherein a thermal bulb assembly is arranged inside the water mixing valve body and comprises a thermal bulb, a thermal bulb ejector rod and a guide sleeve, the upper portion of the thermal bulb is fixedly connected with the guide sleeve, the lower portion of the thermal bulb ejector rod is rotatably connected with the guide sleeve, the guide sleeve is fixedly connected with the inner ring, the upper portion of the thermal bulb ejector rod extends into the groove in the lower portion of the bolt and contacts with the bottom surface of the groove, the temperature sensing portion of the thermal bulb extends into the mixed water cavity, a step surface is formed at the joint of the guide sleeve and the thermal bulb, a flow guide sleeve is sleeved on the outer periphery of the thermal bulb, a water passing space is formed on the upper end surface of the flow guide sleeve, the upper end surface of the flow guide sleeve contacts with the step surface, a reset spring is sleeved between the outer wall of the flow guide sleeve and the gasket fixing seat, and the step surface formed on the outer wall of the flow guide sleeve contacts with the upper end surface of the reset spring.

6. The thermostatic mixing valve with the soft sealing structure according to claim 5, wherein the guide sleeve is fixedly connected with the external thread of the inner ring in a relative manner.