CN107120445B

CN107120445B - Freeze-proof valve

Info

Publication number: CN107120445B
Application number: CN201710462307.7A
Authority: CN
Inventors: 张武; 麦伟添; 廖文龙; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2023-07-28
Anticipated expiration: 2037-06-19
Also published as: CN107120445A

Abstract

The invention relates to an anti-freezing valve, which is characterized in that: the water heater automatic antifreezing device comprises a shell (1), wherein a cavity (10) is formed in the shell (1), a water inlet (11) connected with a water outlet end of the water heater is formed in one end of the shell (1), a water outlet (12) is formed in the other end of the shell (1), a valve element (2) is arranged in the cavity (10), a thermosensitive element (3) capable of being opened or closed along with the change of the ambient temperature is connected to the valve element (2), and the water heater automatic antifreezing function is realized in a more reliable and effective mode with lower cost; meanwhile, the scheme is easy to be used and assembled and disassembled.

Description

Freeze-proof valve

Technical Field

The invention relates to an anti-freezing valve.

Background

In most northern areas of China, the temperature in winter is generally lower than 0 ℃. When the gas water heater is in a non-working state and the waterway system is full of cold water, if the whole gas water heater is installed on a cold balcony or outside cold air flows backward through the smoke exhaust pipe, the temperature in the gas water heater is suddenly reduced, and the pipeline is easily frozen and cracked and water leakage occurs. The antifreezing measures commonly adopted at the present stage are three:

firstly, a safety valve is adopted, namely, the waterway system of the water heater is emptied when the water heater is not used, and the method can effectively prevent freezing, but is easy to cause pipeline frost cracking due to forgetting of users;

secondly, an electric heating component is adopted, the temperature of a waterway can be sensed through a temperature controller, when the temperature is lower than the closing point temperature, the heating component carries out relatively comprehensive and rapid heating on the waterway system, the antifreezing effect of the method is relatively good, and the method is also a main stream antifreezing measure at the present stage, but the power of the component is generally about 90W, the power consumption of the component works for a long time is relatively large, the operation cost of electric auxiliary heat is about 600 yuan according to the service life of 8 years, and the cost is relatively high and hidden danger that the power failure cannot work exists;

the method is mature and can obviously reduce the occurrence of frost crack accidents of the water heater, however, the method only prevents cold air from flowing backwards, has no obvious effect on the condition that the water heater is installed on a cold balcony, and is generally used in combination with the two methods.

In the prior art, in the design of a sealing structure, a rubber sealing scheme is adopted, but the rubber sealing is low in reliability, not wear-resistant and easy to age, is in a sliding and extrusion state for a long time, and is easy to fail due to aging. In addition, in the rubber sealing scheme, a sufficient supporting framework is often required to be designed for rubber, so that the complexity of the whole structure is increased, and the reliability is further reduced.

In view of the above, it is necessary to address the issues described above, and it is against this background that the present invention has been made.

Disclosure of Invention

The invention aims to solve the technical problems that the invention provides an antifreezing valve for solving the defects in the prior art, and aims to solve the current state of the art, and the automatic antifreezing function of the water heater is realized in a more reliable and effective way with lower cost; meanwhile, the scheme is easy to be used and assembled and disassembled.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a frost valve, includes the casing be equipped with the cavity in the casing one end is equipped with the water inlet of being connected with the water heater water outlet the casing other end is equipped with the outlet be equipped with the valve member in the cavity be connected with on the valve member and expand when ambient temperature risees, thereby shrink when ambient temperature falls and open or close the thermosensitive element of valve member.

The valve member comprises a static sealing piece clamped into the inner wall of the shell, a water passing hole is formed in the static sealing piece, a dynamic sealing piece capable of blocking or opening the water passing hole is arranged on the side edge of the static sealing piece, and a driving assembly for driving the dynamic sealing piece to act is connected to the dynamic sealing piece.

The driving assembly comprises a push rod which is propped against between the inner wall of the adjusting nut and the thermosensitive element, a static driving block which is clamped into the inner wall of the shell, an upper wedge block, a lower wedge block and a return spring which are arranged between the thermosensitive element and the dynamic sealing piece, wherein an upper wedge block working inclined plane is arranged on the upper wedge block, a lower wedge block working inclined plane which corresponds to the working inclined plane is arranged on the lower wedge block, a driving rod is arranged on the lower wedge block, the extending end of the driving rod is connected to the dynamic sealing piece, when the ambient temperature is higher than the set temperature, the thermosensitive element expands, the push rod drives the thermosensitive element to move towards the right side of the shell, the thermosensitive element drives the upper wedge block to move towards the right side, the upper wedge block drives the lower wedge block to rotate through the action between the upper wedge block working inclined plane and the lower wedge block working inclined plane, and the driving rod drives the dynamic sealing piece to rotate, so that a water passing hole on the static sealing piece is blocked, and water draining is stopped; when the ambient temperature is lower than the set temperature, the heat-sensitive element contracts, the heat-sensitive element moves towards the left side of the shell, the reset spring drives the lower wedge block to move towards the left side of the shell, a lower wedge block second working inclined plane is arranged on the lower wedge block, a static driving block working inclined plane corresponding to the lower wedge block second working inclined plane is arranged on the static driving block, the lower wedge block is reversed under the action of the lower wedge block second working inclined plane and the static driving block working inclined plane, the driving rod drives the movable sealing sheet to be reversed, and then the water passing hole on the static sealing sheet is opened, so that drainage is started, and water path flow is prevented from freezing.

The driving rod and the dynamic sealing piece are provided with a pressing block, a central water passing hole is formed in the pressing block, a clamping groove for clamping the end part of the driving rod is formed in the outer side face of the circumference of the pressing block, and a clamping block for clamping the dynamic sealing piece is arranged on the surface of the pressing block.

The end of the shell is provided with the adjusting nut, the water outlet is arranged on the adjusting nut, one end of the ejector rod is propped against the inner wall of the adjusting nut, and the other end of the ejector rod is propped against the thermosensitive element.

And a fixed lock nut used for limiting the displacement of the static driving block is arranged between the adjusting nut and the inner wall of the shell, and a first sealing ring is arranged between the fixed lock nut and the inner wall of the shell.

A second sealing ring is arranged between the static sealing piece and the inner wall of the shell.

And a third sealing ring is arranged at the connection part of the water inlet of the shell and the water outlet end of the water heater.

The beneficial effects of the invention are as follows:

1. because the water temperature of the water heater is not lower than 4 ℃ when the water enters the household in winter in the north, the water heater is managed to be in a flowing state before the water channel system is in a critical crystallization temperature, and the water channel system can be always above the critical crystallization temperature point after the water channel absorbs enough heat energy carried by flowing water and friction heat generated by relative flowing, so that the water channel system can be prevented from freezing and cracking.

2. The sealing element adopts butterfly ceramic, has longer service life than common rubber, and has high reliability.

3. The invention utilizes a mechanical rotation structure to realize automatic antifreezing.

4. The invention utilizes the waste heat of pipeline water and forces the waterway to flow, thereby avoiding the pipeline from icing.

5. The pressure relief valve can be used with the existing pressure relief valve interface in a common way, can be directly replaced, does not need an additional structure or an additional interface, and is extremely high in universality and easy to assemble and disassemble.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a cross-sectional view A-A in fig. 3.

Fig. 5 is an exploded view of the present invention.

Fig. 6 is a perspective view of the static drive block of the present invention.

Fig. 7 is a perspective view of the upper wedge of the present invention.

Fig. 8 is a perspective view of the lower wedge of the present invention.

Fig. 9 is a perspective view of a compact of the present invention.

Detailed Description

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

As shown in fig. 1 to 9, an anti-freezing valve comprises a shell 1, wherein a cavity 10 is arranged in the shell 1, a water inlet 11 connected with a water outlet end of a water heater is arranged at one end of the shell 1, a water outlet 12 is arranged at the other end of the shell 1, a valve element 2 is arranged in the cavity 10, a thermosensitive element 3 which can be changed along with the ambient temperature to open or close the valve element 2 is connected to the valve element 2, and because the water temperature of a user in winter in north is not lower than 4 ℃, the water channel system of the water heater is managed to be in a flowing state before being in a critical crystallization temperature, and when the water channel absorbs enough heat energy carried by flowing water and friction heat generated by relative flow, the water channel system can be always in the critical crystallization temperature point or above, so that freezing and frost cracking can be prevented.

As shown in fig. 1, 2, 3, 4 and 5, in this embodiment, the valve element 2 includes a static sealing plate 21 clamped into the inner wall of the housing 1, a water passing hole 210 is provided on the static sealing plate 21, a moving sealing plate 22 capable of blocking or opening the water passing hole 210 is provided on a side of the static sealing plate 21, a driving component 23 driving the moving sealing plate 22 to act is connected to the moving sealing plate 22, and the key point of the scheme is that two wedge-face kinematic pairs are provided, and the sealing pairs are two ceramic plates. When the temperature exceeds the switch temperature, the thermal element expands to increase the displacement of the ejector rod, the upper wedge block moves rightwards under the compression action of the reset spring, the lower wedge block is pushed to rotate, and the fan-shaped dynamic sealing piece is driven to rotate to form a seal; when the temperature is lower than the switch temperature, the heat sensitive wax contracts to reduce the displacement of the ejector rod, the lower wedge block moves leftwards under the action of the reset spring, and under the action of the compression of the reset spring, the lower wedge block reversely rotates under the action of the wedge surface of the static wedge block to drive the fan-shaped movable sealing piece to reversely rotate so as to drain water.

As shown in fig. 2, 4 and 5, in this embodiment, the driving assembly 23 includes a push rod 231 abutted between the inner wall of the adjusting nut 4 and the thermo-sensitive element 3, a static driving block 232 clamped into the inner wall of the casing 1, an upper wedge 233, a lower wedge 234 and a return spring 235 disposed between the thermo-sensitive element 3 and the dynamic sealing plate 22, an upper wedge working inclined surface 2331 is disposed on the upper wedge 233, a lower wedge working inclined surface 2341 corresponding to the working inclined surface 2331 is disposed on the lower wedge 234, a driving rod 2342 is disposed on the lower wedge 234, an extending end of the driving rod 2342 is connected to the dynamic sealing plate 22, when the ambient temperature is higher than the set temperature, the thermo-sensitive element 3 expands, the push rod 231 drives the thermo-sensitive element 3 to move to the right side of the casing 1, the thermo-sensitive element 3 drives the upper wedge 233 to move to the right side, the upper wedge 233 is driven to rotate by the action between the upper wedge 2331 and the lower wedge working inclined surface 2341, the driving rod 2342 drives the dynamic sealing plate 210 to stop rotating, thereby sealing the dynamic sealing plate 21; when the ambient temperature is lower than the set temperature, the thermal element 3 contracts, the thermal element 3 moves to the left side of the housing 1, the return spring 235 drives the lower wedge 234 to move to the left side of the housing 1, a lower wedge second working inclined surface 2343 is arranged on the lower wedge 234, a static driving block working inclined surface 2321 corresponding to the lower wedge second working inclined surface 2343 is arranged on the static driving block 232, the lower wedge 234 is reversed under the action of the lower wedge second working inclined surface 2343 and the static driving block working inclined surface 2321, the driving rod 2342 drives the movable sealing piece 22 to be reversed, and then the water passing hole 210 on the static sealing piece 21 is opened, so that water drainage is opened, water channel flow is prevented from freezing, the novel anti-freezing valve comprises an adjusting nut, an ejector rod, an upper wedge, a lower wedge, a return spring, a pressing block, a movable sealing piece, a static sealing piece, a sealing ring, a fixed locking nut, a static driving block and a shell, one end of the ejector rod is inserted into a head of the thermal element, and the other end of the ejector rod is placed into a groove on the adjusting nut; the adjusting nut is connected with the fixed lock nut through threads; the fixed lock nut is connected with the shell through threads, and the position after connection is fixed; the fixed lock nut is sealed with the shell through a sealing structure; the fixed lock nut is contacted with the static driving block to limit the axial displacement of the static driving block; the thermal element passes through the static driving block, the upper wedge block and the lower wedge block center hole; the central aperture of the static driving block is larger than the diameter of the flange of the thermal element; the central aperture of the upper wedge block is smaller than the diameter of the flange of the thermal element; the central aperture of the lower wedge block is smaller than the diameter of the flange of the thermal element; the reset spring is sleeved in the thermal element, one end of the reset spring is contacted with the lower wedge block, and the other end of the reset spring is contacted with the pressing block; the lower wedge block is matched with the pressing block through a sliding groove and a sliding rod; the lower wedge block can drive the pressing block to rotate; the pressing block is buckled into the step of the movable sealing piece to drive the movable sealing piece to rotate; the contact surface of the dynamic sealing piece and the static sealing piece is a sealing surface; the static sealing piece forms a seal with the shell through a sealing ring; the static driving block, the upper wedge block and the static sealing piece are matched with the shell through a sliding groove; the static driving block and the upper wedge block can only slide along the axial direction of the shell and cannot rotate; the shell, the sealing ring, the static sealing piece, the dynamic sealing piece and the pressing block are always in a compression state under the pressure action of the return spring; the lower wedge block, the upper wedge block, the thermal element, the ejector rod and the adjusting nut are always in a compression state under the action of the pressure of the reset spring; the adjusting nut can adjust the initial position of the thermal dynamic element, so as to adjust the initial included angle between the dynamic sealing piece and the static sealing piece; the static driving block, the upper wedge block and the lower wedge block are matched through inclined planes, and the static driving block or the upper wedge block can drive the lower wedge block to rotate under the action of spring force.

As shown in fig. 1, 2, 4 and 5, in this embodiment, a pressing block 236 is disposed between the driving rod 2342 and the dynamic sealing plate 22, a central water passing hole 2361 is disposed on the pressing block 236, a clamping groove 2362 for clamping an end of the driving rod 2342 is disposed on an outer circumferential side surface of the pressing block 236, a clamping block 2363 for clamping the dynamic sealing plate 22 is disposed on a disc surface of the pressing block 236, and the pressing block plays a good transition role to realize rotation of the dynamic sealing plate and connection between the dynamic sealing plate and a lower wedge.

As shown in fig. 1, 2, 4 and 5, in the present embodiment, an adjusting nut 4 is provided at an end of the housing 1, the water outlet 12 is provided on the adjusting nut 4, one end of the push rod 231 is pressed against an inner wall of the adjusting nut 4, the other end of the push rod 231 is pressed against the heat sensitive element 3, and when the ambient temperature is raised from 0 ℃ to 4 ℃, the outward movement distance of the push rod end face is greater than or equal to 1mm; when the ambient temperature of the thermal element is reduced from 10 ℃ to 0 ℃, the inward movement distance of the end face of the push rod is more than or equal to 1mm, and the front end of the shell is provided with a universal interface for being connected with a water heater; a static sealing piece sliding groove is formed in the shell and used for preventing the static sealing piece from rotating; an upper wedge block sliding groove is formed in the shell, so that the upper wedge block can only slide along the axial direction and cannot rotate; the inside of the shell is provided with a static driving block chute, so that the static driving block can only slide along the axial direction and cannot rotate; the inside adjusting screw thread that is provided with of casing makes things convenient for adjusting nut to adjust the working temperature that prevents frostbite.

As shown in fig. 1, 2, 4 and 5, in this embodiment, a fixed lock nut 5 for limiting displacement of the static driving block 232 is disposed between the adjusting nut 4 and the inner wall of the housing 1, and a first sealing ring 61 is disposed between the fixed lock nut 5 and the inner wall of the housing 1, and the static driving block is provided with a protruding rib; the static driving block slides along a sliding groove of the static driving block through a convex rib but cannot rotate; the static driving block is provided with a driving inclined plane for driving the lower wedge block to rotate.

As shown in fig. 1, 2, 4, and 5, in the present embodiment, a second seal ring 62 is provided between the static seal piece 21 and the inner wall of the housing 1.

As shown in fig. 1, 2, 4 and 5, in this embodiment, a third sealing ring 63 is provided at a portion of the housing 1 where the water inlet 11 is connected to the water outlet of the water heater.

As shown in fig. 1, 2, 4 and 5, in this embodiment, the upper wedge is provided with a rib; the upper wedge block slides along the upper wedge block chute through the convex rib but cannot rotate; the upper wedge block is provided with a driving inclined plane for driving the lower wedge block to rotate.

As shown in fig. 1, 2, 4 and 5, in this embodiment, the lower wedge is provided with a sliding rod, and the sliding rod is matched with the pressing block chute, so that the pressing block is driven to rotate when the lower wedge rotates; the lower wedge block is provided with a working inclined plane which is matched with the driving inclined plane of the static driving block, and the lower wedge block is driven to rotate clockwise when the ejector rod is shortened; the lower wedge block is provided with a working inclined plane which is matched with the upper wedge block driving inclined plane, and the lower wedge block is driven to rotate anticlockwise when the ejector rod stretches.

As shown in fig. 1, 2, 4 and 5, in this embodiment, the static sealing plate is provided with ribs; the static sealing piece is matched and positioned with the sliding groove of the static sealing piece through a convex rib; the static sealing piece is provided with a water passing hole, and when the dynamic sealing piece and the static sealing piece reach a certain included angle, the water passing hole is exposed for water drainage.

As shown in fig. 1, 2, 4 and 5, in this embodiment, the pressing block is provided with a sliding groove, and the lower wedge sliding rod is matched, so that the pressing block is driven to rotate when the sliding rod rotates; the pressing block is provided with a clamping position, is matched with the step of the movable sealing piece, presses and seals the movable sealing piece and the static sealing piece under the action of the reset spring, and can drive the movable sealing piece to rotate when the pressing block rotates.

As shown in fig. 1, 2, 4 and 5, in the present embodiment, the adjusting nut is provided with a drain port for draining low-temperature water.

Claims

1. An anti-freeze valve, characterized in that: the water heater comprises a shell (1), wherein a cavity (10) is formed in the shell (1), a water inlet (11) connected with a water outlet end of the water heater is formed in one end of the shell (1), a water outlet (12) is formed in the other end of the shell (1), a valve element (2) is arranged in the cavity (10), and a thermosensitive element (3) which expands when the ambient temperature rises and contracts when the ambient temperature drops and is used for opening or closing the valve element (2) is connected to the valve element (2); the valve element (2) comprises a static sealing piece (21) clamped into the inner wall of the shell (1), a water passing hole (210) is formed in the static sealing piece (21), a dynamic sealing piece (22) capable of blocking or opening the water passing hole (210) is arranged on the side edge of the static sealing piece (21), and a driving assembly (23) for driving the dynamic sealing piece (22) to rotate is connected to the dynamic sealing piece (22); an adjusting nut (4) is arranged at the end part of the shell (1), the driving assembly (23) comprises a push rod (231) which is propped against between the inner wall of the adjusting nut (4) and the heat-sensitive element (3), a static driving block (232) which is clamped into the inner wall of the shell (1), an upper wedge block (233), a lower wedge block (234) and a return spring (235) which are arranged between the heat-sensitive element (3) and the dynamic sealing sheet (22); an upper wedge working inclined plane (2331) is arranged on the upper wedge (233), a lower wedge working inclined plane (2341) corresponding to the upper wedge working inclined plane (2331) is arranged on the lower wedge (234), a driving rod (2342) is arranged on the lower wedge (234), and the extending end of the driving rod (2342) is connected to the movable sealing plate (22).

2. The freeze valve of claim 1, wherein: when the ambient temperature is higher than the set temperature, the thermosensitive element (3) expands, the ejector rod (231) drives the thermosensitive element (3) to move to the right side of the shell (1), the thermosensitive element (3) drives the upper wedge block (233) to move to the right side, the upper wedge block (233) drives the lower wedge block (234) to rotate through the action between the upper wedge block working inclined surface (2331) and the lower wedge block working inclined surface (2341), and the driving rod (2342) drives the movable sealing sheet (22) to rotate so as to further block the water passing hole (210) on the static sealing sheet (21), so that water discharge is stopped; when the ambient temperature is lower than the set temperature, the thermal element (3) contracts, the thermal element (3) moves towards the left side of the shell (1), the reset spring (235) drives the lower wedge block (234) to move towards the left side of the shell (1), a lower wedge block second working inclined plane (2343) is arranged on the lower wedge block (234), a static driving block working inclined plane (2321) corresponding to the lower wedge block second working inclined plane (2343) is arranged on the static driving block (232), the lower wedge block (234) rotates reversely under the action of the lower wedge block second working inclined plane (2343) and the static driving block working inclined plane (2321), and the driving rod (2342) drives the movable sealing plate (22) to rotate reversely, so that the water passing holes (210) on the static sealing plate (21) are opened, and water is discharged, so that water flow is prevented from freezing.

3. The freeze valve of claim 1, wherein: a pressing block (236) is arranged between the driving rod (2342) and the dynamic sealing sheet (22), a central water passing hole (2361) is formed in the pressing block (236), a clamping groove (2362) for clamping the end part of the driving rod (2342) is formed in the outer side face of the circumference of the pressing block (236), and a clamping block (2363) for clamping the dynamic sealing sheet (22) is arranged on the disc surface of the pressing block (236).

4. A freeze valve according to claim 3 characterised in that: the water outlet (12) is arranged on the adjusting nut (4), one end of the ejector rod (231) is propped against the inner wall of the adjusting nut (4), and the other end of the ejector rod (231) is propped against the thermosensitive element (3).

5. The freeze valve of claim 4, wherein: a fixed lock nut (5) used for limiting the displacement of the static driving block (232) is arranged between the adjusting nut (4) and the inner wall of the shell (1), and a first sealing ring (61) is arranged between the fixed lock nut (5) and the inner wall of the shell (1).

6. The freeze valve of claim 1, wherein: a second sealing ring (62) is arranged between the static sealing piece (21) and the inner wall of the shell (1).

7. The freeze valve of claim 1, wherein: a third sealing ring (63) is arranged at the connection part of the water inlet (11) of the shell (1) and the water outlet end of the water heater.