CN210623756U

CN210623756U - Temperature-sensing cut-off valve

Info

Publication number: CN210623756U
Application number: CN201921576437.4U
Authority: CN
Inventors: 杨和军
Original assignee: Taizhou Guoren Thermostatic Sanitaryware Co ltd
Current assignee: Taizhou Guoren Thermostatic Sanitaryware Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-05-26
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a temperature sensing trip valve, including the casing, the casing both ends are provided with water inlet and delivery port respectively, are provided with the piston chamber in the casing, and the piston is installed to the piston intracavity, and memory alloy spring and reset spring are installed respectively to the piston both sides, form the choke between piston upper surface and the piston chamber up end, and the piston edge is provided with overflows the passageway or forms between piston side and the piston chamber lateral wall and overflows the passageway. The temperature-sensing cut-off valve is simple in structure, wide in application range, high in temperature-sensing sensitivity and good in through-flow capacity.

Description

Temperature-sensing cut-off valve

Technical Field

The utility model relates to a sanitary bath equipment, in particular to temperature sensing trip valve.

Background

The temperature sensing cut-off valve is a bathroom device which detects the water temperature and controls the on-off of water flow. When the temperature of water flowing inside the cut-off valve is higher than the designed cut-off temperature, the cut-off valve automatically cuts off the water flow. At present, the shut-off valve is used more generally in zero cold water circulation waterway systems of shower heads and water heaters.

When the temperature sensing trip valve is connected with the gondola water faucet, when the temperature that flows through the temperature sensing trip valve is higher than the design temperature, the trip valve need cut off rivers rapidly to avoid the higher rivers of temperature to pass through the gondola water faucet blowout, cause the scald accident, consequently require highly to the sensitive degree of temperature sensing trip valve. When the temperature-sensing cut-off valve is used in the zero cold water circulation waterway system of the water heater, the temperature-sensing cut-off valve needs to have better through-flow capacity, so that cold water in the pipeline can rapidly circulate, and the circulation time is shortened.

Chinese patent No. 201820884951.3 discloses an anti-scald device for a shower head, which uses a bulb as a temperature sensing element, and simultaneously pushes a lifting plug to plug a water passage through a mandril extending out of the bulb, thereby realizing the cutting off of water flow. The temperature bulb sensitivity is low, and the reaction speed is slow. Meanwhile, the size of the thermal bulb is large, and the thermal bulb can occupy a large flow passage volume when being installed in the water passing pipe, so that the flow of the scald-proof device is influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a temperature sensing trip valve, simple structure, application scope is wide, and temperature sensing sensitivity is higher, has better through-flow capacity simultaneously.

The above technical purpose of the present invention can be achieved by the following technical solutions: a temperature-sensing cut-off valve comprises a shell, a water inlet and a water outlet are formed in two ends of the shell respectively, a piston cavity is formed in the shell, a piston is mounted in the piston cavity, a memory alloy spring and a return spring are mounted on two sides of the piston respectively, a throttling opening is formed between the upper surface of the piston and the upper end face of the piston cavity, and an overflowing channel is formed in the edge of the piston or between the side face of the piston and the side wall of the piston cavity.

Through above-mentioned technical scheme, the memory alloy spring can respond to the temperature to take place expansion or shrink, thereby make the piston slide in the piston intracavity axial, increase or reduce the size of choke. When the water temperature is lower than the designed cut-off water temperature, the throttling port is always in an open state, the two ends of the shell are communicated, and water is discharged normally. When the water temperature rises to the designed cut-off water temperature, the memory alloy spring expands, so that the upper surface of the piston and the upper end surface of the piston cavity are in a dead state, and the water flow is cut off.

The memory alloy spring has a faster reaction speed than a bulb using paraffin as a temperature sensing element, and can expand more rapidly to cut off water flow. Meanwhile, the memory alloy spring is spiral, the whole volume is small, the occupied internal space of the valve core cavity is small, and water flow in the piston cavity cannot be blocked. Meanwhile, the volume of the piston cavity occupied by the memory alloy spring is small, and when the overflowing channel is arranged on the edge of the piston or between the side face of the piston and the side wall of the piston cavity, the whole flowing area of the overflowing channel can be designed to be large, so that the flowing capacity is further improved.

The memory alloy spring can be arranged in the piston cavity at the water inlet side and can also be arranged in the piston cavity at the water outlet side. In addition, in the in-service use process, the direction of water inlet and delivery port can be changed, should cut off the case promptly both can advance water from the water inlet, and the delivery port goes out water, also can advance water from the delivery port, goes out water from the water inlet.

Preferably, the water inlet or the water outlet is internally threaded with an adjusting sleeve, the middle part of the adjusting sleeve is provided with a through hole communicated with the piston cavity, and the end part of the return spring or the memory alloy spring is abutted against the adjusting sleeve.

Through above-mentioned technical scheme, the setting of adjusting collar can be calibrated and change cutting off the temperature. The adjusting sleeve is connected with the shell through threads, and the position of the adjusting sleeve relative to the shell can be finely adjusted conveniently.

Preferably, the cross section of the through hole is polygonal.

Through the technical scheme, the cross section of the through hole can be a triangle, a quadrangle, a hexagon or other regular or irregular polygons. The cross section of the through hole is arranged in such a way that the polygonal adjusting rod can conveniently extend into the through hole, so that the adjusting sleeve is driven to rotate.

Preferably, the piston comprises a first spring seat arranged at one end of the piston, and an orifice is formed between an upper surface of the first spring seat and an upper end surface of the piston cavity.

Through above-mentioned technical scheme, the setting of spring holder one can restrict the spring position for the spring can not lead to in the course of the work taking place the skew because of flexible conflict point with the piston, influences the uniformity of cutting off the temperature.

Preferably, the other end of the piston is provided with a second spring seat.

Preferably, the piston cavity is circular in cross section, and the piston edge is polygonal.

Through above-mentioned technical scheme, it is comparatively convenient that the piston chamber cross-section is circular processing, and the piston edge is the polygon, when the piston was installed to the piston intracavity, left the space between piston side and the piston chamber lateral wall naturally, formed the intercommunication passageway for the water of piston top can flow in the piston below.

Preferably, a sliding groove for guiding the sliding direction of the piston is arranged in the piston cavity.

Through the technical scheme, the piston can slide along the axis direction of the shell all the time due to the arrangement of the sliding grooves, and the piston is prevented from being clamped and blocked in the sliding process.

Preferably, the housing comprises an upper housing and a lower housing, and the upper housing and the lower housing are connected through threads.

Through above-mentioned technical scheme, the casing divide into two parts, and whole processing is comparatively convenient, and the piston can be comparatively convenient installation in the piston chamber simultaneously.

Preferably, the end part of the piston cavity communicated with the water inlet and/or the water outlet is provided with a spring cavity, and the end part of one end of the spring is arranged in the spring cavity.

Through above-mentioned technical scheme, the setting in spring chamber can be spacing to the tip of spring for the spring tip can obtain better fixed, prevents that spring tip position from taking place the skew when the use.

Compared with the prior art, the beneficial effects of the utility model are that: detect the temperature through using the memory alloy spring for the trip valve is more sensitive to the response of temperature, simultaneously because the whole cross sectional area of spring is less, can not produce the hindrance to the rivers flow in the piston cavity, thereby makes this trip valve have better current capacity, and application range is wider simultaneously.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment;

FIG. 2 is an exploded view of an embodiment;

FIG. 3 is a perspective view of a lower housing according to a first embodiment;

FIG. 4 is a perspective view of a piston according to one embodiment;

FIG. 5 is a perspective cross-sectional view of an upper housing portion in accordance with a first embodiment;

fig. 6 is a perspective view of a piston according to a second embodiment.

Reference numerals: 1. a housing; 2. a water inlet; 3. a water outlet; 4. a piston cavity; 5. a piston; 6. a memory alloy spring; 7. a return spring; 8. a choke; 9. an overflow channel; 10. an adjusting sleeve; 11. a through hole; 12. a first spring seat; 13. a second spring seat; 14. a chute; 15. an upper housing; 16. a lower housing; 17. a spring chamber.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

The implementation is beneficial to one, a temperature-sensing cut-off valve,

as shown in fig. 1, the temperature-sensitive shut-off valve comprises a housing 1, wherein the housing 1 is formed by connecting an upper housing 15 and a lower housing 16 through threads. Be provided with delivery port 3 on the last casing 15, be provided with water inlet 2 on the casing 16 down, go up and all be provided with the cavity in casing 15 and the casing 16 down, two cavity intercommunications form piston chamber 4, and water inlet 2 and delivery port 3 all communicate with piston chamber 4.

A piston 5 is arranged in the piston cavity 4, a return spring 7 is arranged on the upper side of the piston 5, and a memory alloy spring 6 is arranged on the lower side of the piston 5. The upper side of the piston 5 is provided with a first spring seat 12, the lower side of the piston 5 is provided with a second spring seat 13, and the first spring seat 12, the second spring seat 13 and the piston 5 are integrally arranged. The end that piston chamber 4 and delivery port 3 communicate is provided with spring chamber 17, and the end that piston chamber 4 and water inlet 2 communicate also is provided with spring chamber 17. A return spring 7 is arranged between the spring cavity 17 at the water outlet 3 side and the first spring seat 12, and a memory alloy spring 6 is arranged between the spring cavity 17 at the water inlet 2 side and the second spring seat 13. And an orifice 8 is formed between the first spring seat 12 and the upper end surface of the piston cavity 4.

The edge of the outermost side of the piston 5 is hexagonal, the section of the piston cavity 4 is circular, and a gap is reserved between the side surface of the piston 5 and the inner wall of the piston cavity 4, so that a flow passage 9 is formed. The water entering from the water inlet 2 passes through the piston 5 through the flow passage 9 and then flows out from the water outlet 3. A sliding groove 14 is arranged in the piston cavity 4 along the axial direction of the shell 1, and the sharp corner of the edge of the piston 5 is clamped in the sliding groove 14, so that the sliding direction of the piston 5 is limited and guided.

When the temperature of the outlet water is suddenly raised to the designed cut-off temperature, the memory alloy spring 6 expands to push the piston 5 to slide above the piston cavity 4, so that the upper surface of the first spring seat 12 is tightly propped against the upper end surface of the piston cavity 4, the first throttling port 8 is closed, water flow is cut off, and the phenomenon that the water flow with too high temperature flows out to cause scald is avoided. When the water temperature in the piston cavity 4 is reduced, the memory alloy spring 6 contracts, and the return spring 7 pushes the piston 5 to move downwards, so that the throttling opening 8 is opened, and water flow can normally flow.

An adjusting sleeve 10 is arranged in the water outlet 3, and the adjusting sleeve 10 is connected with the upper shell 15 through threads. The lower end of the adjusting sleeve 10 is positioned in the spring cavity 17, and the upper end of the return spring 7 is abutted against the lower end of the adjusting sleeve 10. When the adjusting sleeve 10 is rotated, the axial position of the adjusting sleeve 10 can be finely adjusted, the pre-pressure of the return spring 7 is changed, and the cutting temperature is further changed. The middle of the adjusting sleeve 10 is provided with a through hole 11, so that water flow can normally flow through the adjusting sleeve 10. The cross section of the through hole 11 is hexagonal, so that the adjusting sleeve 10 can be driven to rotate by a hexagonal wrench, and the cutting-off temperature can be controlled.

Second embodiment, a temperature-sensing cut-off valve

As shown in fig. 6, the difference between the second embodiment and the first embodiment is that the piston 5 in the second embodiment is circular on the whole side, and a plurality of flow through holes 11 are formed on the edge of the piston 5 outside the first spring seat 12 for water to pass through.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides a temperature sensing trip valve, includes casing (1), and casing (1) both ends are provided with water inlet (2) and delivery port (3) respectively, characterized by: be provided with piston chamber (4) in casing (1), install piston (5) in piston chamber (4), memory alloy spring (6) and reset spring (7) are installed respectively to piston (5) both sides, form throttle mouth (8) between piston (5) upper surface and piston chamber (4) up end, and piston (5) edge is provided with overflows passageway (9) or forms and overflows passageway (9) between piston (5) side and piston chamber (4) lateral wall.

2. A temperature sensitive shut off valve according to claim 1 wherein: the water inlet (2) or the water outlet (3) is internally threaded with an adjusting sleeve (10), the middle part of the adjusting sleeve (10) is provided with a through hole (11) communicated with the piston cavity (4), and the end part of the reset spring (7) or the memory alloy spring (6) is abutted against the adjusting sleeve (10).

3. A temperature sensitive shut off valve according to claim 2 wherein: the cross section of the through hole (11) is polygonal.

4. A temperature sensitive shut off valve according to claim 1 wherein: the piston (5) comprises a first spring seat (12) arranged at one end of the piston, and a throttling opening (8) is formed between the upper surface of the first spring seat (12) and the upper end surface of the piston cavity (4).

5. The temperature-sensitive cut-off valve of claim 4, wherein: the other end of the piston (5) is provided with a second spring seat (13).

6. A temperature sensitive shut off valve according to claim 1 wherein: the section of the piston cavity (4) is circular, and the edge of the piston (5) is polygonal.

7. The temperature-sensitive cut-off valve of claim 6, wherein: a sliding chute (14) for guiding the sliding direction of the piston (5) is arranged in the piston cavity (4).

8. A temperature sensitive shut off valve according to claim 1 wherein: the shell (1) comprises an upper shell (15) and a lower shell (16), and the upper shell (15) and the lower shell (16) are connected through threads.

9. A temperature sensitive shut off valve according to claim 1 wherein: the end part of the piston cavity (4) communicated with the water inlet (2) and/or the water outlet (3) is provided with a spring cavity (17), and the end part of one end of the spring is arranged in the spring cavity (17).