CN110220022B - Safety valve and water heater - Google Patents
Safety valve and water heater Download PDFInfo
- Publication number
- CN110220022B CN110220022B CN201910395352.4A CN201910395352A CN110220022B CN 110220022 B CN110220022 B CN 110220022B CN 201910395352 A CN201910395352 A CN 201910395352A CN 110220022 B CN110220022 B CN 110220022B
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- CN
- China
- Prior art keywords
- pressure limiting
- pressure
- water inlet
- safety valve
- water outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
- F16K17/046—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a safety valve and a water heater, wherein the safety valve comprises: the valve body is used for defining a first accommodating space, and a water inlet hole and a water outlet hole are formed in the inner wall of the first accommodating space; the pressure limiting module is arranged in the first accommodating space, the pressure limiting module can be switched between an opening state and a pressure limiting state, when the pressure limiting module is in the opening state, the water inlet hole is communicated with the water outlet hole, and when the pressure limiting module is in the pressure limiting state, the water inlet hole is not communicated with the water outlet hole. According to the safety valve provided by the embodiment of the invention, the pressure limiting module is arranged in the safety valve, so that the pressure in the safety valve can be reduced, the influence of tap water pressure on a used product is better prevented, and the problem caused by the excessive tap water pressure is avoided.
Description
Technical Field
The invention relates to the technical field of water heating equipment, in particular to a safety valve and a water heater.
Background
In the related art, since the municipal water supply or the secondary water supply has too high water pressure, the water dripping phenomenon occurs when the water pressure exceeds the leakage pressure of the safety valve.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art.
Therefore, the invention provides the safety valve which can timely reduce the pressure and save the cost.
The invention also provides a water heater with the safety valve.
According to an embodiment of the first aspect of the present invention, a safety valve includes: the valve body is used for defining a first accommodating space, and a water inlet hole and a water outlet hole are formed in the inner wall of the first accommodating space; the pressure limiting module is arranged in the first accommodating space, the pressure limiting module can be switched between an opening state and a pressure limiting state, when the pressure limiting module is in the opening state, the water inlet hole is communicated with the water outlet hole, and when the pressure limiting module is in the pressure limiting state, the water inlet hole is not communicated with the water outlet hole.
According to the safety valve provided by the embodiment of the invention, the pressure limiting module is arranged in the safety valve, so that the pressure in the safety valve can be reduced, the influence of tap water pressure on a used product is better prevented, and the problem caused by the excessive tap water pressure is avoided.
According to one embodiment of the present invention, the voltage limiting module includes: a sliding member disposed in the first accommodating space, a first annular channel and a second annular channel disposed in the axial direction of the sliding member at intervals being provided between the sliding member and an inner wall of the first accommodating space, the sliding member being slidable between an open position and a pressure limiting position, the water inlet and the water outlet both communicating with the first annular channel when the sliding member is slid to the open position, the water inlet and the first annular channel communicating with each other when the sliding member is slid to the pressure limiting position, the water outlet communicating with the second annular channel; and the reset component is connected with the sliding component and used for pushing the sliding component to slide from the pressure limiting position to the opening position.
According to an alternative example of the present invention, the sliding member includes: a push shaft slidably fitted in the first accommodation space in a horizontal direction; the first sealing piece is arranged on the pushing shaft and can slide synchronously with the pushing shaft, a plurality of convex rings are arranged on the first sealing piece along the axial direction of the pushing shaft at intervals, and the convex rings define a first annular channel and a second annular channel.
According to another alternative example of the present invention, the collar is sealed between the first seal and the first accommodation space inner wall.
Optionally, the first sealing member is provided with a matching hole, and one end of the push shaft facing the reset elastic member can be inserted and fixed in the matching hole.
Optionally, the first seal and the push shaft are integrally formed.
According to another optional example of the invention, the reset member comprises: the pressure limiting elastic piece and the reset elastic piece are respectively and fixedly connected to the inner walls of the two sides of the first accommodating space, the pushing shaft is connected between the pressure limiting elastic piece and the reset elastic piece, and the pressure limiting elastic piece and the reset elastic piece can jointly act to push the pushing shaft to slide from the pressure limiting position to the opening position.
Further, the first accommodation space includes first accommodation portion and second accommodation portion that communicate each other, the radial dimension of first accommodation portion is greater than the radial dimension of second accommodation portion, push away the head of axle with the pressure limiting elastic component links to each other and is in first accommodation portion internal fit slip, first sealing member cover is established push away the axle keep away from the one end of head and can be in the second accommodation portion with push away the axle synchronous slip, the bulge loop is stopped and is in on the inner wall of second accommodation portion.
Further, the safety valve further includes: and a second seal member sealed between the head of the push shaft and the inner wall of the first accommodation portion.
According to another embodiment of the invention, the pressure value of the pressure limiting module in the first accommodating space in the pressure limiting state is p, and p is more than or equal to 0.08MPa and less than or equal to 0.6MPa.
According to a further embodiment of the invention, the valve body further defines a second accommodation space, the first accommodation space and the second accommodation space are vertically communicated to form a water inlet passage, the first accommodation space is provided with a water inlet end, the second accommodation space is provided with a water outlet end, and a pressure relief opening is arranged in the valve body and is communicated with the second accommodation space.
Further, the safety valve further includes: the internal leakage module is arranged in the second accommodating space, and is opened to conduct the water inlet passage when the pressure of the water outlet end is larger than that of the water inlet end; the check module is arranged in the second accommodating space to control the opening and closing of the water inlet passage, and the check module closes the water inlet passage when the pressure of the water outlet end is smaller than that of the internal leakage module; the leakage module is arranged at the pressure relief opening, and is opened to conduct the pressure relief opening when the internal leakage module is in a failure state and the pressure of the water outlet end is larger than that of the water inlet end.
The water heater according to the second aspect of the embodiment of the present invention includes the safety valve according to the above embodiment for reducing the water pressure on the water supply line of the water heater.
According to the water heater provided by the embodiment of the invention, the pressure limiting module is arranged in the safety valve, so that the pressure in the safety valve can be reduced, the influence of tap water pressure on a used product is better prevented, and the problem caused by the excessive tap water pressure is avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic illustration of a safety valve according to an embodiment of the present invention;
FIG. 2 is a schematic view of a pressure limiting state of a relief valve according to an embodiment of the present invention;
fig. 3 is a schematic view of an opened state of a safety valve according to an embodiment of the present invention.
Reference numerals:
100: a safety valve;
10: a valve body; 10a: a first accommodation space; 11: a water inlet hole; 12: a water outlet hole; 13: a first accommodation portion; 14: a second accommodating portion; 10b: a second accommodation space; 15: an annular flange; 10c: a pressure relief port; 16: a sealing flange; 10d: a through hole;
21: a sliding member; 21a: a first annular channel; 21b: a second annular channel; 211: pushing the shaft; 2111: a head; 212: a first seal; 2121: a convex ring;
22: a reset member; 221: a pressure limiting elastic member; 222: a return elastic member;
23: a second seal;
241: a push rod; 2411: a needle bar; 2412: a top cap; 242: an internal release spring;
251: a spring seat; 252: a check spring; 253: a first gasket;
261: a handle; 262: a first seal seat; 263: a pull rod; 264: a pressing member; 265: a leakage spring; 266: a second gasket; 267: and a second sealing seat.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The following describes a safety valve 100 according to an embodiment of the present invention with reference to fig. 1 to 3, and the safety valve 100 may be used in a pipe and a pressure-bearing device of a water heater, and has a safety protection function.
As shown in fig. 1, the safety valve 100 according to the embodiment of the present invention includes a valve body 10 and a pressure limiting module, wherein the valve body 10 defines a first accommodating space 10a, and a water inlet hole 11 and a water outlet hole 12 are provided on an inner wall of the first accommodating space 10a, i.e., the water inlet hole 11 and the water outlet hole 12 are respectively communicated with the first accommodating space 10a, the pressure limiting module is installed in the first accommodating space 10a, water flow can enter the first accommodating space 10a from the water inlet hole 11, flow through the pressure limiting module, and flow out from the water outlet hole 12, and when the pressure in the first accommodating space 10a is too high, the pressure limiting module can reduce the internal pressure.
Further, the pressure limiting module is switchable between an open state and a pressure limiting state in the first accommodating space 10a, as shown in fig. 3, when the pressure limiting module is in the open state, the water inlet 11 and the water outlet 12 are connected, and at this time, water flow forms a passage along the direction from the water inlet 11, the first accommodating space 10a and the water outlet 12, as shown in fig. 2, when the pressure in the first accommodating space 10a is too high, the pressure limiting module is switched from the open state to the pressure limiting state, and the water inlet 11 and the water outlet 12 are not connected, i.e., are open in the direction from the water inlet 11 to the water outlet 12, so as to avoid further increase of the internal pressure.
According to the safety valve 100 of the embodiment of the invention, the pressure limiting module is arranged in the safety valve 100, and is switched between the opening state and the pressure limiting state, so that the on-off of the water inlet hole 11 to the water outlet hole 12 is realized, the pressure in the safety valve 100 can be reduced, the influence of tap water pressure on a used product is better prevented, the problem caused by overhigh tap water pressure is avoided, and in addition, the pressure limiting module is integrated in the safety valve 100, the production cost is reduced, and the structure is simplified.
Alternatively, the water inlet 11 may be formed as one or more circular holes, the water outlet 12 may be formed as one or more circular holes, and the water inlet 11 and the water outlet 12 may be square, oval, or the like.
As shown in fig. 2, according to an embodiment of the present invention, the pressure limiting module includes a slide member 21 and a return member 22, the return member 22 being connected to the slide member 21, the slide member 21 being provided in the first accommodation space 10a, a first annular channel 21a and a second annular channel 21b being provided between the slide member 21 and an inner wall of the first accommodation space 10a, the first annular channel 21a and the second annular channel 21b being arranged at a distance in an axial direction of the slide member 21, for example, the first annular channel 21a being located on a left side of the second annular channel 21b when the slide member 21 is extended horizontally.
Further, the sliding member 21 is slidable between an open position and a pressure limiting position, as shown in fig. 3, when the sliding member 21 is in the open position, the water inlet 11 and the water outlet 12 are both in communication with the first annular passage 21a, the water inlet 11 is located below the water outlet 12, the water inlet 11 is in communication with the lower side of the first annular passage 21a, the water outlet 12 is in communication with the upper side of the first annular passage 21a, and at this time, water flow can enter the first annular passage 21a from the water inlet 11 and be discharged from the water outlet 12.
As shown in fig. 2, when the water pressure of the inlet water gradually increases, the water is discharged from the water outlet 12, the pressure in the valve body 10 increases, a pushing force is generated on the sliding member 21, the sliding member 21 is pushed to slide to the pressure limiting position (the arrow in fig. 2 shows the pushing force direction), the water inlet 11 is communicated with the first annular channel 21a, the water outlet 12 is communicated with the second annular channel 21b, that is, the water inlet 11 is respectively located in different annular channels at this time, the water inlet 11 and the water outlet 12 are in an open state, and the water flow cannot pass through, so as to avoid the pressure in the valve body 10 from further increasing. When the water pressure at the output end of the valve body 10 is fully released, the pressure in the valve body 10 is reduced, the thrust to the push shaft 211 is reduced, and the reset member 22 can push the sliding member 21 to slide back to the open position from the pressure limiting position due to the self-restoring acting force, so that the water inlet hole 11 and the water outlet hole 12 are simultaneously communicated with the first annular channel 21a to form a passage for water flow.
According to an alternative example of the present invention, the sliding member 21 includes a push shaft 211 and a first sealing member 212, the push shaft 211 being slidably fitted in the first receiving space 10a in a horizontal direction, as shown in fig. 1, the push shaft 211 being horizontally slidable in a left-right direction, the first sealing member 212 being provided on the push shaft 211, the first sealing member 212 being fixedly coupled to the push shaft 211 such that the first sealing member 212 can be slid in synchronization with the push shaft 211 when the push shaft 211 is horizontally slid, the two cooperating to facilitate controlling the on-off of the water inlet 11 and the water outlet 12.
Further, the first sealing member 212 is provided with a plurality of rings 2121, the rings 2121 are distributed at intervals along the axial direction of the push shaft 211, the rings 2121 together define a first annular channel 21a and a second annular channel 21b, as shown in fig. 1, three rings 2121 are distributed at intervals along the axial direction of the first sealing member 212, one annular channel is defined between each two adjacent rings 2121, it is understood that, from the left to right direction in fig. 1, the three rings 2121 sequentially define a first annular channel 21a and a second annular channel 21b, the first annular channel 21a is always communicated with the first annular channel 21a, when the push shaft 211 slides to the open position, the water inlet 11 and the water outlet 12 are located between the two adjacent rings 2121, and are all communicated with the first annular channel 21a, when the push shaft 211 slides to the pressure limiting position, the water inlet 11 and the water outlet 12 are respectively located in the middle rings 2121 (from the left to the right direction to the second ring 2121), the water inlet 11 and the water outlet 12 are located on the two sides of the middle rings 2121, and the water inlet 11 and the water outlet 12 are located on the two sides of the middle rings 2121, so that the water inlet 11 and the water outlet 12 are communicated with the middle ring 2121.
In the description of the present invention, "plurality" means two or more.
According to another alternative example of the present invention, the convex ring 2121 seals between the first sealing member 212 and the inner wall of the first accommodating space 10a, that is, the end of the convex ring 2121 is stopped against the inner wall of the first accommodating space 10a, on one hand, by adopting the convex ring 2121 to seal between the first sealing member 212 and the inner wall of the first accommodating space 10a, the first annular channel 21a and the second annular channel 21b can be effectively separated, the tightness between the first annular channel 21a and the second annular channel 21b is ensured, and the water inlet hole 11 and the water outlet hole 12 are in the open circuit state when the push shaft 211 is in the pressure limiting position; on the other hand, the fitting between the slide member 21 and the first accommodation space 10a can be made reliable, and the structure is more stable.
Optionally, a mating hole is formed in the first sealing element 212, and one end of the push shaft 211 facing the reset elastic element 222 (the right end of the push shaft 211 as shown in fig. 1) can be inserted into the mating hole, that is, the first sealing element 212 is sleeved on the push shaft 211 and ensures the fixed connection of the push shaft 211 and the first sealing element, so that the first sealing element 212 can slide synchronously along with the push shaft 211, the push shaft 211 and the first sealing element 212 are fixed by tight fit, and other fixing modes such as screws, adhesives and the like can also be adopted.
Optionally, the first sealing element 212 and the pushing shaft 211 are integrally formed, so that the number of parts is reduced, machining and forming are facilitated, assembly efficiency is improved, and production cost is saved. It will be appreciated that the push shaft 211 and the first seal 212 are integrated as one piece and that the collar 2121 is provided on the first seal 212 or that the self-sealing effect is achieved by adjusting the mating dimensions between the first seal 212 and the valve body 10.
According to another alternative example of the present invention, the restoring member 22 includes a pressure limiting elastic piece 221 and a restoring elastic piece 222, the pressure limiting elastic piece 221 and the restoring elastic piece 222 are fixedly connected to both side inner walls of the first accommodating space 10a, respectively, as shown in fig. 1, the pressure limiting elastic piece 221 is connected to the left end inner wall of the first accommodating space 10a, the restoring elastic piece 222 is connected to the right end inner wall of the first accommodating space 10a, the push shaft 211 is connected between the pressure limiting elastic piece 221 and the restoring elastic piece 222, specifically, the pressure limiting elastic piece 221 is abutted against the left end of the push shaft 211, the restoring elastic piece 222 is abutted against the right end of the push shaft 211, and when the push shaft 211 is in the pressure limiting position, the elastic forces of the pressure limiting elastic piece 221 and the restoring elastic piece 222 are both increased, and under the combined action of the elastic force of the pressure limiting elastic piece 221 and the elastic force of the restoring elastic piece 222, the push shaft 211 can be pushed back to the open position, that is, the restoring member 22 has a function of sliding the slide member 21 back to the open position.
As shown in fig. 1, further, the first accommodating space 10a includes a first accommodating portion 13 and a second accommodating portion 14, the first accommodating portion 13 and the second accommodating portion 14 are mutually communicated, the radial dimension of the first accommodating portion 13 is larger than that of the second accommodating portion 14, the head portion 2111 of the push shaft 211 is connected with the pressure limiting elastic member 221, the head portion 2111 of the push shaft 211 refers to the left end of the push shaft 211, the head portion 2111 of the push shaft 211 can slide in the first accommodating portion 13 in a matched manner, the first sealing member 212 is sleeved at one end, far away from the head portion 2111, of the push shaft 211 (the right end of the push shaft 211 is shown in fig. 1), and the first sealing member 212 can slide in the second accommodating portion 14 synchronously with the push shaft 211, and the convex ring 2121 abuts against the inner wall of the second accommodating portion 14 to ensure tightness between the first sealing member 212 and the inner wall of the second accommodating portion 14.
Alternatively, the pressure limiting elastic member 221 may be a pressure limiting spring, and the return elastic member 222 may be a return spring, so that the pressure limiting elastic member 221 and the return elastic member 222 have good elastic forces respectively, so as to ensure the return function of the return member 22. The pressure limiting spring and the return spring can be made of antirust metal materials, and can also be replaced by other elastic materials with the same function (such as elastic silicon rubber materials and the like), and the pressure limiting spring and the return spring are not particularly limited.
Further, the safety valve 100 further includes a second sealing member 23, wherein the second sealing member 23 seals between the head portion 2111 of the push shaft 211 and the inner wall of the first receiving portion 13, as shown in fig. 1, an annular groove is provided on the head portion 2111 of the push shaft 211, and the second sealing member 23 is fitted in the annular groove, so that the sealing performance between the head portion 2111 of the push shaft 211 and the inner wall of the first receiving portion 13 is ensured, and the two can be tightly fitted.
According to another embodiment of the present invention, the pressure value of the pressure limiting module in the first accommodating space 10a is p, where p is equal to or less than 0.08MPa and equal to or less than 0.6MPa, specifically, the pressure value p may be 0.08MPa, 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, and 0.6MPa, and specifically, the parameters and the dimensions of the pressure limiting elastic element 221 and the reset elastic element 222 may be adjusted according to actual needs, for example, the pressure limiting elastic element 221 and the reset elastic element 222 with different types of materials are selected, and the pressure limiting elastic element 221 and the reset elastic element 222 with different dimensions (such as diameters, lengths, etc.) may also be selected, so that dynamic pressure limiting and static pressure limiting of p in the range of 0.08MPa to 0.6MPa may be achieved, thereby increasing the application range of the pressure limiting module.
According to still another embodiment of the present invention, the valve body 10 further defines a second accommodating space 10b, the first accommodating space 10a and the second accommodating space 10b are vertically communicated with each other to form a water inlet passage penetrating up and down, the first accommodating space 10a has a water inlet end, the second accommodating space 10b has a water outlet end, the water inlet end is connected with a water supply pipe, water flows into the first accommodating space 10a through the water inlet end, when the water inlet pressure is gradually increased, water is discharged from the water outlet hole 12, the pressure in the valve body 10 is continuously increased, the sliding member 21 is pushed to generate left displacement, and the restoring elastic force of the pressure limiting elastic member 221 is increased, so that the water inlet hole 11 is disconnected from the water outlet hole 12 and enters a pressure limiting state; when the water pressure at the water outlet end of the valve body 10 is sufficiently released, the pressure inside the valve body 10 is reduced, the pressure on the pushing shaft 211 is reduced, and the elastic force of the pressure limiting elastic piece 221 pushes the sliding member 21 to generate a positive displacement, wherein the positive displacement refers to a distance moving rightward in fig. 2 to 3, so that the water inlet hole 11 and the water outlet hole 12 form a water inlet passage again, and the water inlet passage enters an open state.
In addition, be equipped with pressure release mouth 10c in valve body 10, pressure release mouth 10c and second accommodation space 10b intercommunication can follow pressure release mouth 10c in time when the pressure in the valve body 10 is too high, avoids causing the potential safety hazard because the pressure is too big in the valve body 10.
Further, the safety valve 100 further includes an inner leakage module, a check module and an outer leakage module, the inner leakage module is disposed in the second accommodating space 10b, when the pressure of the water outlet end is greater than the pressure of the water inlet end, the inner leakage module is opened to conduct the water inlet passage, the check module is disposed in the second accommodating space 10b to control the opening and closing of the water inlet passage, when the pressure of the water outlet end is less than the pressure of the inner leakage module, the check module closes the water inlet passage, the outer leakage module is disposed at the pressure relief opening 10c, and when the pressure of the inner leakage module is in a failure state and the pressure of the water outlet end is greater than the pressure of the water inlet end, the outer leakage module is opened to conduct the pressure relief opening 10c.
As shown in fig. 1, the check module includes a spring seat 251, a check spring 252, and a first gasket 253. The second accommodation space 10b is provided with an annular flange 15 at one end facing the pressure limiting module, a spring seat 251 is axially movably provided in the valve body 10, a first gasket 253 is provided at one side of the spring seat 251 facing the pressure limiting module, and the first gasket 253 is separated from or contacted with the annular flange 15 to control the opening or closing of the water inlet passage. The check spring 252 is assembled on the other side of the spring seat 251 away from the pressure limiting module, one end of the check spring 252 is fixed, the other end is stopped against the spring seat 251, when the water inlet pressure is greater than the elastic force of the check spring 252, the spring seat 251 and the first sealing gasket 253 move upwards, the first sealing gasket 253 is separated from the annular flange 15, and the water inlet passage is opened (water flow enters from the outer edges of the spring seat 251 and the first sealing gasket 253); when the inflow pressure is smaller than the elastic force of the check spring 252, the spring seat 251 and the first gasket 253 move downward, and the first gasket 253 contacts the annular flange 15, so that the inflow path is closed, thereby preventing the occurrence of a reverse flow phenomenon when the outflow pressure is smaller than the inflow pressure.
The internal leakage module comprises a push rod 241, an internal leakage spring 242 and a first sealing gasket 253, wherein the push rod 241 is provided with a needle rod 2411 and a top cap 2412, the push rod 241 can axially movably penetrate through the first sealing gasket 253 and a central hole of a spring seat 251, the top cap 2412 is positioned on one side of the first sealing gasket 253 facing the pressure limiting module, a spring clamping groove is formed in the needle rod 2411, one end of the internal leakage spring 242 is connected in the spring clamping groove, and the other end of the internal leakage spring 242 is stopped on the spring seat 251. The top cap 2412 is separated from or in contact with the first gasket 253 to control opening and closing of the internal leakage path (i.e., the first gasket 253 and the central hole of the spring seat 251) in the water inlet path.
The leakage module includes a handle 261, a first seal seat 262, a pull rod 263, a compression member 264, a leakage spring 265, a second seal 266, and a second seal seat 267. A relief vent 10c is provided on the right side of the valve body 10, and the relief vent 10c communicates with the second accommodation space 10b, and an inverted seal flange 16 is provided at the relief vent 10c. The first seal seat 262 is fixedly sealed at the right end in the valve body 10, the pull rod 263 is slidably arranged in the guide hole of the first seal seat 262 in a penetrating manner, the right end of the pull rod 263 is connected with the handle 261, the left end of the pull rod 263 is connected with the second seal seat 267, and the second seal gasket 266 is arranged at the left end of the second seal seat 267. The second seal seat 267 can move left and right relative to the pull rod 263 within a certain range, the pressing piece 264 is arranged in the middle of the pull rod 263 in a penetrating way, the outer edge of the pressing piece 264 is in threaded fit with the inner wall of the valve body 10, one end of the leakage spring 265 is stopped against the pressing piece 264, the other end of the leakage spring 265 is stopped against the second seal seat 267, and a through hole 10d is formed in the wall of the valve body 10 between the pressing piece 264 and the second seal seat 267.
When the pressure in the water supply device is greater than the pressure of the escape spring 265, the second gasket 266 is separated from the sealing flange 16 by the water outlet pressure, opening the outer relief passage (relief port 10c to through hole 10 d); when the pressure in the water supply is less than the pressure of the leakage spring 265, the second gasket 266 returns to its original position under the action of the leakage spring 265, contacts the sealing flange 16, and closes the outer pressure relief passage. The pressing member 264 is rotated to move left and right in the valve body 10, so that the pressure of the leakage spring 265 to the second seal seat 267, that is, the threshold value of automatic pressure relief is adjusted. In addition, when manual pressure release is required, the handle 261 can be rotated to drive the second seal seat 267 and the second seal pad 266 to move rightward by the draw rod 263, so as to open the external pressure release passage.
The water heater according to the second aspect of the present invention includes the safety valve 100 according to the above-described embodiment for reducing the water pressure on the water supply line of the water heater.
According to the water heater provided by the embodiment of the invention, the pressure limiting module is arranged in the safety valve 100, so that the pressure in the safety valve 100 can be reduced, the influence of tap water pressure on a used product can be better prevented, and the problem caused by the excessive tap water pressure is avoided.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A safety valve, comprising:
the valve body is used for defining a first accommodating space, and a water inlet hole and a water outlet hole are formed in the inner wall of the first accommodating space;
the pressure limiting module is arranged in the first accommodating space, the pressure limiting module can be switched between an opening state and a pressure limiting state, when the pressure limiting module is in the opening state, the water inlet hole is communicated with the water outlet hole, and when the pressure limiting module is in the pressure limiting state, the water inlet hole is not communicated with the water outlet hole;
a sliding member provided in the first accommodation space, the sliding member being slidable between an open position and a pressure limiting position,
a return member coupled to the slide member for urging the slide member to slide from the pressure-restricting position to the open position;
the sliding member includes:
a push shaft slidably fitted in the first accommodation space in a horizontal direction; a first sealing element which is arranged on the pushing shaft and can slide synchronously with the pushing shaft,
the reset member includes: the pressure limiting elastic piece and the reset elastic piece are respectively and fixedly connected to the inner walls of the two sides of the first accommodating space, the pushing shaft is connected between the pressure limiting elastic piece and the reset elastic piece, and the pressure limiting elastic piece and the reset elastic piece can jointly act to push the pushing shaft to slide from the pressure limiting position to the opening position;
when the pushing shaft is positioned at the pressure limiting position, the elastic force of the pressure limiting elastic piece and the elastic force of the reset elastic piece are increased.
2. The safety valve according to claim 1, wherein the pressure limiting module includes:
the sliding member is provided with a first annular channel and a second annular channel which are axially arranged at intervals on the sliding member, when the sliding member slides to the opening position, the water inlet hole and the water outlet hole are communicated with the first annular channel, when the sliding member slides to the pressure limiting position, the water inlet hole is communicated with the first annular channel, and the water outlet hole is communicated with the second annular channel.
3. The safety valve according to claim 2, wherein the first seal member is provided with a plurality of projecting rings spaced apart along the axial direction of the push shaft, the plurality of projecting rings defining the first annular passage and the second annular passage.
4. A safety valve according to claim 3, wherein the collar is sealed between the first seal and the first accommodation space inner wall.
5. The safety valve according to any one of claims 1 to 4, wherein the first sealing member is provided with a fitting hole, and an end of the push shaft facing the return elastic member is insertably fixed in the fitting hole.
6. The safety valve according to any one of claims 1 to 4, wherein the first seal and the push shaft are integrally formed.
7. A safety valve according to claim 3, wherein the first accommodating space comprises a first accommodating portion and a second accommodating portion which are communicated with each other, the radial dimension of the first accommodating portion is larger than that of the second accommodating portion, the head portion of the push shaft and the pressure limiting elastic piece are connected and slide in the first accommodating portion in a matched manner, the first sealing piece is sleeved at one end of the push shaft far away from the head portion and can slide in the second accommodating portion and the push shaft synchronously, and the convex ring is abutted against the inner wall of the second accommodating portion.
8. The safety valve according to claim 7, further comprising: and a second seal member sealed between the head of the push shaft and the inner wall of the first accommodation portion.
9. The safety valve according to claim 1, wherein the pressure value of the pressure limiting module in the first accommodation space in the pressure limiting state is p, and p is 0.08 mpa.ltoreq.p.ltoreq.0.6 MPa.
10. The safety valve according to claim 1, wherein the valve body further defines a second accommodation space, the first accommodation space and the second accommodation space are vertically communicated to form a water inlet passage, the first accommodation space has a water inlet end, the second accommodation space has a water outlet end, and a pressure relief port is provided in the valve body, and the pressure relief port is communicated with the second accommodation space.
11. The safety valve according to claim 10, further comprising:
the internal leakage module is arranged in the second accommodating space, and is opened to conduct the water inlet passage when the pressure of the water outlet end is larger than that of the water inlet end;
the check module is arranged in the second accommodating space to control the opening and closing of the water inlet passage, and the check module closes the water inlet passage when the pressure of the water outlet end is smaller than that of the internal leakage module;
the leakage module is arranged at the pressure relief opening, and is opened to conduct the pressure relief opening when the internal leakage module is in a failure state and the pressure of the water outlet end is larger than that of the water inlet end.
12. A water heater, comprising: the safety valve of any one of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395352.4A CN110220022B (en) | 2019-05-13 | 2019-05-13 | Safety valve and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395352.4A CN110220022B (en) | 2019-05-13 | 2019-05-13 | Safety valve and water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110220022A CN110220022A (en) | 2019-09-10 |
| CN110220022B true CN110220022B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395352.4A Active CN110220022B (en) | 2019-05-13 | 2019-05-13 | Safety valve and water heater |
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| Country | Link |
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| CN (1) | CN110220022B (en) |
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| CN109210241A (en) * | 2017-07-03 | 2019-01-15 | 芜湖美的厨卫电器制造有限公司 | Safety valve and water heater |
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2019
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| US3809111A (en) * | 1970-07-10 | 1974-05-07 | A Olsson | Pressure reduction valve |
| CN101382206A (en) * | 2007-09-04 | 2009-03-11 | 珠海经济特区环辉塑料模具有限公司 | Voltage limiting and self locking safety valve for electric water heater |
| CN202992293U (en) * | 2012-08-03 | 2013-06-12 | 厦门建霖工业有限公司 | Automatic pressure relief water heater safety valve |
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| CN110220022A (en) | 2019-09-10 |
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