CN116877745A - Pressure release valve and direct drinking machine with same - Google Patents
Pressure release valve and direct drinking machine with same Download PDFInfo
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- CN116877745A CN116877745A CN202311148759.XA CN202311148759A CN116877745A CN 116877745 A CN116877745 A CN 116877745A CN 202311148759 A CN202311148759 A CN 202311148759A CN 116877745 A CN116877745 A CN 116877745A
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- 230000035622 drinking Effects 0.000 title description 9
- 239000007789 gas Substances 0.000 claims description 77
- 230000000903 blocking effect Effects 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
- A47J31/461—Valves, e.g. drain valves
-
- 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
-
- 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
- F16K17/0493—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 a spring other than a helicoidal spring
-
- 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
- F16K17/06—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 special arrangements for adjusting the opening pressure
-
- 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
- F16K17/08—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 special arrangements for providing a large discharge passage
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
-
- 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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Safety Valves (AREA)
Abstract
The application relates to the technical field of valves and provides a pressure relief valve and a direct-drinking machine with the same, which comprises a main valve core and an auxiliary valve core, wherein the auxiliary valve core is arranged on the main valve core, the safety pressure value of the main valve core is set to be larger than that of the auxiliary valve core, when the pressure in a conveying pipeline is smaller, the pressure is relieved through the auxiliary valve core, when the pressure is increased faster, the auxiliary valve core frequently relieves the pressure to trigger a switch assembly, and after the pressure value exceeds the safety pressure value of the auxiliary valve core, the pressure is relieved through the main valve core, so that the pressure in the conveying pipeline can be more stable, and the pressure fluctuation in the pipeline is reduced. Meanwhile, in the pressure relief process, the opening and closing times of the main valve core are less than those of the auxiliary valve core, and the service life of the main valve core is prolonged.
Description
Technical Field
The application relates to the technical field of valves, in particular to a pressure release valve and a direct-drinking machine with the same.
Background
A pressure relief valve, also known as a relief valve or pressure relief valve, is a device for controlling pressure. Different application scenarios and working environments may require different types of relief valves, such as spring-loaded relief valves, weight-loaded relief valves, diaphragm-loaded relief valves, etc. Mainly for placing containers, pipes or systems with internal pressures exceeding design or safety limits, so as to avoid explosions, leaks or other risks. For example, chinese patent CN101943284a discloses a water hammer protection relief valve, which comprises a main valve and a pilot valve, wherein the pilot valve is located above the main valve, and the pilot valve senses the pressure in the pipeline to open the main valve, thereby realizing the pressure relief of the pipeline and eliminating the pressure peak.
However, the pressure release valve of the scheme has only one pressure release opening, only one pressure value can be set, when the pressure in the pipeline is increased to the set pressure value, the valve is directly opened, so that the pressure in the pipeline suddenly drops, the pressure fluctuation in the pipeline is large, the pipeline is possibly damaged, and meanwhile, a valve core is frequently opened, so that the service life of the valve core is reduced.
Disclosure of Invention
Accordingly, it is necessary to provide a pressure relief valve and a direct drinking machine with the pressure relief valve, which solve the problem that the pressure fluctuation in the pressure relief valve pipeline is large and the pipeline is easy to damage.
The above purpose is achieved by the following technical scheme:
a pressure relief valve, comprising:
the valve body is hollow, and the two ends of the valve body are respectively provided with an inlet and an outlet;
a main spool located within the valve body, the main spool being axially movable along the valve body to open or close an inlet;
the main valve core is internally provided with a cavity, one end of the main valve core, which is close to the inlet, is provided with a channel, the channel is communicated with the inlet and the outlet, an auxiliary valve core is arranged in the cavity, and the auxiliary valve core can move along the axial direction of the main valve core so as to open or close the channel;
the pressure required to open the secondary spool is less than the pressure required to open the primary spool;
a first chamber is formed between the main valve core and the valve body, and a second chamber is formed between one end of the auxiliary valve core, which is far away from the channel, and the main valve core;
the second cavity is provided with a first through hole, the first cavity is communicated with the second cavity through the first through hole, in an initial state, the first through hole is blocked by the switch component, so that the first cavity is mutually isolated from the second cavity, the air pressure in the first cavity is larger than the air pressure in the second cavity, and after the opening and closing frequency of the auxiliary valve core reaches a preset value, the switch component stops blocking the first through hole, and the first cavity is communicated with the second cavity.
Further, the switch assembly includes a first blocking piece capable of moving in an axial direction of the first through hole so that the first blocking piece blocks or opens the first through hole.
Further, the first baffle plate can move along the axial direction of the first through hole through driving of the transmission assembly.
Further, the transmission assembly comprises a first air chamber and a second air chamber, a stop lever is arranged in the second air chamber, one end of the stop lever is connected with the first stop plate, a baffle plate is arranged at the other end of the stop lever, a moving ring is arranged in the second air chamber, the moving ring is sleeved on the stop lever and far away from the baffle plate, an air inlet is arranged below the second air chamber, which is close to the moving ring, the first air chamber is communicated with the second air chamber, a piston rod is arranged in the first air chamber, the auxiliary valve core is connected with the piston rod, a gap is reserved between the peripheral wall of the moving ring and the inner peripheral wall of the second air chamber, the moving ring is contacted with the baffle plate after moving to a preset height in the second air chamber, and the moving ring continuously moves to drive the baffle plate to axially move along the first through hole.
Further, the pressure relief valve further includes a pressure control assembly capable of controlling the magnitude of the air pressure in the first chamber and the second chamber.
Further, the pressure control assembly comprises a gas transmission bottle and a pressure gauge, the gas transmission bottle is arranged on the outer side of the valve body, the gas transmission bottle can convey gas to the first cavity and the second cavity, the pressure gauge is arranged on the gas transmission bottle, and the pressure gauge can detect the gas pressure in the first cavity and the second cavity.
Further, a second through hole is formed in the second cavity and communicated with the gas transmission bottle, a second baffle plate is arranged on the second through hole, and the second baffle plate can open or close the second through hole;
when the first baffle blocks the first through hole, the second baffle opens the second through hole; when the first through hole is opened by the first baffle plate, the second through hole is closed by the second baffle plate.
Further, the second baffle is arranged on the stop lever, and the stop lever can drive the first baffle and the second baffle to synchronously move.
Further, the gas conveyed by the gas conveying bottle is nitrogen.
The application also provides a direct drinking machine, which comprises the pressure release valve.
The beneficial effects of the application are as follows:
according to the pressure relief valve and the direct-drinking machine with the same, the pressure in the conveying pipeline is relieved partially by the aid of the double valve cores of the main valve core and the auxiliary valve core, pressure fluctuation in the conveying pipeline is reduced, and then the pressure in the pipeline is relieved by the aid of the main valve core, so that sudden change of the pressure in the pipeline caused by directly opening the main valve core for pressure relief can be avoided, the pressure in the conveying pipeline can be more stable, and the pressure fluctuation in the pipeline is reduced. Meanwhile, in the pressure relief process, the opening and closing times of the main valve core are less than those of the auxiliary valve core, and the service life of the main valve core is prolonged.
According to the application, when the on-off frequency of the auxiliary valve core reaches a preset value through the arrangement of the switch assembly, the first cavity is communicated with the second cavity, the safety pressure values of the main valve core and the auxiliary valve core are consistent, and when the air pressure is increased to the safety pressure value set by the main valve core, the pressure is relieved through the main valve core. The main valve core shares the work of the auxiliary valve core, and the frequent opening and closing of the auxiliary valve core is converted into the primary opening and closing of the main valve core, so that the over-high opening and closing frequency of the auxiliary valve core is avoided, and the accuracy and the service life of the auxiliary valve core are influenced.
According to the application, through the arrangement of the transmission assembly, the frequent opening and closing of the auxiliary valve core is converted into the movement of the movable ring in the second cavity, so that energy is saved.
Drawings
Fig. 1 is a schematic structural diagram of a pressure release valve according to an embodiment of the present application;
FIG. 2 is a left side view of the relief valve provided in one embodiment of FIG. 1;
FIG. 3 is a front view of a relief valve provided in one embodiment of FIG. 1;
FIG. 4 is a cross-sectional view of the relief valve provided in one embodiment of FIG. 2 taken along line A-A;
FIG. 5 is a cross-sectional view of the relief valve provided in one embodiment of FIG. 3 taken along line B-B;
FIG. 6 is an enlarged view of a portion of the relief valve C provided in one embodiment of FIG. 4;
fig. 7 is a schematic block diagram of a relief valve according to an embodiment of the present application.
Wherein:
100. a valve body; 110. an inlet; 120. an outlet; 130. a channel; 140. a fixing frame;
200. a main spool; 210. a first chamber; 220. a first gas transmission pipeline; 230. sealing the tube;
300. a secondary valve core; 310. a pressure relief tube; 320. a second chamber; 330. a second gas transmission pipeline; 340. a connecting plate; 341. a piston rod; 342. a first air chamber; 343. a first connection pipe; 344. a second air chamber; 345. a vent hole; 346. a second connection pipe; 350. a first through hole; 351. a second through hole;
400. a stop lever; 410. a first baffle; 420. a second baffle; 430. a baffle;
500. a moving ring;
600. a pressure control assembly.
Detailed Description
The present application will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
A relief valve provided by the present application is described below with reference to fig. 1-7.
A pressure release valve is suitable for controlling the pressure in a water conservancy delivery pipeline, a fuel gas delivery pipeline and an oil delivery pipeline to avoid damaging the pipelines, and is particularly suitable for pressure release of a direct drinking machine, for example, the pressure release valve is required to be installed in a pipeline for delivering hot water in the direct drinking machine, namely, the direct drinking machine can generate gas in the process of heating drinking water, if the gas is not discharged in time, the pipelines can be damaged after the pressure value in the pipelines exceeds a safe pressure value, and therefore, the pressure release valve is required to be installed in the pipelines.
A pressure release valve comprises a valve body 100, wherein the interior of the valve body 100 is hollow, an inlet 110 and an outlet 120 are arranged at two ends of the valve body 100, one end of the inlet 110 is communicated with a hot water conveying pipeline (not shown in the figure) of a water dispenser, and one end of the outlet 120 is communicated with a collecting device (not shown in the figure) which is used for collecting substances, such as gas or liquid, discharged from the pipeline due to the fact that the pressure exceeds a safe pressure value.
The valve body 100 is internally provided with a main valve core 200, the main valve core 200 is positioned between the inlet 110 and the outlet 120, one end of the valve body 100, which is close to the inlet 110, is provided with a valve seat, one end of the main valve core 200, which is close to the inlet 110, is abutted against the valve seat so as to block the inlet 110, the main valve core 200 can move along the axial direction of the valve body 100 to open or close the inlet 110, when the pressure in a conveying pipeline is abnormal and exceeds a safety pressure value set by the main valve core 200, the pressure on one surface, which is close to the inlet 110, of the main valve core 200 is greater than the pressure on the other end, so that a pressure difference is formed, the main valve core 200 is pushed, the main valve core 200 moves along the axial direction of the valve body 100, which is far away from the inlet 110, the inlet 110 is not blocked, and the inlet 110 is opened, so that pressure relief is completed. When the pressure experienced by the side of main spool 200 near the inlet 110 is less than the pressure at the other end, main spool 200 moves in a direction toward inlet 110 to block inlet 110 in preparation for the next pressure relief.
The main valve core 200 is internally provided with a cavity, the cavity is internally provided with a secondary valve core 300, one end of the main valve core 200, which is close to the inlet 110, is provided with a channel 130, the channel 130 is communicated with the inlet 110 and the outlet 120, one end of the secondary valve core 300 is abutted to the opening of the channel 130 so as to block the channel 130, the secondary valve core 300 can move along the axial direction of the main valve core 200 to open or close the channel 130, one end of the main valve core 200, which is close to the inlet 110, is internally provided with a pressure relief pipe 310, one end of the pressure relief pipe 310 is communicated with the channel 130, and when the channel 130 is opened by the secondary valve core 300, the pressure in the conveying pipeline can be relieved through the channel 130 and the pressure relief pipe 310. It should be noted that, when the pressure required for opening the auxiliary valve element 300 is smaller than the pressure required for opening the main valve element 200, and the pressure in the conveying pipeline fluctuates, the pressure exceeds the safety pressure value set by the auxiliary valve element 300, but does not exceed the safety pressure value set by the main valve element 200, and at this time, the generated pressure fluctuation can be relieved through the auxiliary valve element 300, so that the pressure in the pipeline is ensured to be relatively stable.
When the pressure generated in the pipeline is gradually increased and the pressure release speed of the auxiliary valve core 300 is insufficient to complete the pressure release, the pressure gradually reaches the safety pressure value set by the main valve core 200, and at the moment, the main valve core 200 is opened, so that the pressure release is started, and the pipeline can be prevented from being damaged.
In another implementation, the positions of the main valve core 200 and the auxiliary valve core 300 are not limited to the above structure, but the main valve core 200 and the auxiliary valve core 300 may be arranged in parallel, that is, two pressure relief holes (not shown in the figure) are formed at the inlet 110 of the valve body 100, one ends of the main valve core 200 and the auxiliary valve core 300 are respectively abutted against the two pressure relief holes, so as to block the two pressure relief holes, the other ends of the main valve core 200 and the auxiliary valve core 300 may be provided with a compression spring (not shown in the figure), the elastic coefficient of the compression spring of the main valve core 200 is set to be greater than the elastic coefficient of the compression spring of the auxiliary valve core 300, so that the safety pressure value of the main valve core 200 is greater than the safety pressure value of the auxiliary valve core 300, and the main valve core 200 and the auxiliary valve core 300 are independently moved without mutual influence. When the pressure in the conveying pipeline exceeds the safety pressure value set by the auxiliary valve core 300, the auxiliary valve core 300 starts to release pressure, and when the pressure in the conveying pipeline increases too fast, the pressure release speed of the auxiliary valve core 300 is lower than the pressure increase speed, so that the pressure in the conveying pipeline exceeds the safety pressure value set by the main valve core 200, the main valve core 200 is opened, the auxiliary valve core 300 is assisted to release pressure, and the pressure in the conveying pipeline is ensured not to exceed the limit pressure which can be born by the conveying pipeline.
The pressure in the conveying pipeline can be firstly relieved by the aid of the auxiliary valve core 300, pressure fluctuation in the conveying pipeline is reduced, pressure relief is carried out through the main valve core 200, and therefore abrupt change of the pressure in the pipeline caused by pressure relief of the main valve core 200 caused by direct opening can be avoided, the pressure in the conveying pipeline can be stable, and pressure fluctuation in the pipeline is reduced. Meanwhile, in the pressure release process, the opening and closing times of the main valve core 200 are smaller than those of the auxiliary valve core 300, and the service life of the main valve core 200 is prolonged.
Specifically, the fixed mount 140 that is provided with in the valve body 100 is fixed, and mount 140 can provide the track for main valve core 200 removes, is provided with the shrinkage pool on the mount 140, and main valve core 200 is kept away from the shrinkage pool of import 110 one end nested setting in mount 140, and main valve core 200 can follow the axial movement of valve body 100 in the shrinkage pool, forms first cavity 210 between the shrinkage pool of main valve core 200 and mount 140, is full of gas in the first cavity 210. A seal tube 230 is disposed within the main spool 200, the seal tube 230 is located at an axial position of the main spool 200, and one end of the seal tube 230 communicates with the channel 130 on the main spool 200. The sub-valve 300 is disposed in the sealing tube 230, and a second chamber 320 is formed between the sealing tube 230 and the end of the sub-valve 300 remote from the passage 130, and the second chamber 320 is filled with gas. It should be noted that, the force of the gas in the first chamber 210 on the main valve element 200 is greater than the force of the gas in the second chamber 320 on the sub valve element 300, that is, the force required to open the main valve element 200 is greater than the force required to open the sub valve element 300.
A switch assembly is arranged between the first chamber 210 of the main valve core 200 and the second chamber 320 of the auxiliary valve core 300, when the switch assembly is closed, the first chamber 210 and the second chamber 320 are isolated from each other, when the switch assembly is opened, the first chamber 210 and the second chamber 320 are communicated so that the air pressure of the air in the first chamber 210 and the air in the second chamber 320 are the same, and further the main valve core 200 and the auxiliary valve core 300 are subjected to the same acting force, and when the pressure in a conveying pipeline fluctuates, the main valve core 200 and the auxiliary valve core 300 can synchronously move, namely the main valve core 200 is opened for decompression.
It should be noted that, when there is pressure fluctuation in the conveying pipeline and the pressure exceeds the safety pressure value set by the auxiliary valve core 300, the auxiliary valve core 300 starts to release pressure, if the auxiliary valve core 300 is frequently opened and closed, it is indicated that the pressure in the conveying pipeline is continuously increased, if the frequency of opening and closing the auxiliary valve core 300 exceeds a preset value (the preset value can be set according to the material of the auxiliary valve core 300 and the use scene, which is not specifically limited herein), the switch assembly is started at this time, and the switch assembly communicates the first chamber 210 with the second chamber 320, so that the air pressure in the first chamber 210 and the air pressure in the second chamber 320 are balanced, so that the main valve core 200 and the auxiliary valve core 300 are equivalent to one valve core, and when the air pressure increases to exceed the safety pressure value set by the main valve core 200, the main valve core 200 is opened and closed to release pressure, so that the frequent opening and closing of the auxiliary valve core 300 is converted into one opening and closing of the main valve core 200, thereby avoiding the situations of reduced accuracy and reduced service life caused by the frequent opening and closing of the auxiliary valve core 300.
Specifically, the switch assembly includes a first blocking piece 410, the sealing tube 230 is provided with a first through hole 350, the first through hole 350 communicates with the first chamber 210 and the second chamber 320, the first blocking piece 410 is located in the first through hole 350, and the blocking rod 400 can move along the axial direction of the first through hole 350. In the initial state, the first blocking piece 410 blocks the first through hole 350, so that the first chamber 210 and the second chamber 320 are isolated from each other, and when the pressure in the conveying pipeline increases slowly, if the pressure exceeds the safety pressure value set by the auxiliary valve core 300, the pressure is relieved through the auxiliary valve core 300. When the pressure in the conveying pipeline is continuously increased, the auxiliary valve core 300 is frequently opened and closed for pressure relief, but when the frequency of opening and closing the auxiliary valve core 300 reaches a preset value, the first baffle piece 410 moves axially at this time to open the first through hole 350, the first chamber 210 is communicated with the second chamber 320, the pressure received by the main valve core 200 and the auxiliary valve core 300 is the same, and when the air pressure reaches a safe air pressure value set by the main valve core 200, the main valve core 200 is opened for pressure relief.
It should be noted that, the switch assembly is not limited to the above structure, and the switch assembly may be an electric control valve, specifically, the electric control valve is installed on the first through hole 350, and is in a closed state when the electric control valve is in an initial state, and when the frequency of opening and closing the auxiliary valve core 300 reaches a preset value, the electric control valve is automatically opened; when the frequency of opening and closing the auxiliary valve core 300 does not reach the preset value, the electric control valve still keeps the closed state.
In a further embodiment, the relief valve further includes a transmission assembly, and the secondary valve core 300 can drive the stop lever 400 to axially move along the first through hole 350 through the transmission assembly when the secondary valve core 300 is frequently opened or closed.
Specifically, the transmission assembly includes a first air chamber 342 and a second air chamber 344, the first air chamber 342 is fixedly disposed on the outer peripheral surface of the sealing tube 230, the second air chamber 344 is fixedly disposed on the inner wall of the main valve core 200, one end of the second air chamber 344 faces the first through hole 350, a stop lever 400 is disposed in the second air chamber 344, one end of the stop lever 400 is connected with the first stop piece 410, a baffle 430 is fixedly connected to the other end of the stop lever 400, a moving ring 500 is disposed in the second air chamber 344, a gap is formed between the outer peripheral surface of the moving ring 500 and the inner peripheral surface of the second air chamber 344, the moving ring 500 is disposed below the baffle 430, and the moving ring 500 can move in the second air chamber 344 to drive the stop lever 430 to move along the axial direction of the first through hole 350. The bottom of the second air chamber 344 is provided with an air inlet, the top is provided with a vent hole 345, the air inlet at the bottom of the second air chamber 344 is communicated through a first connecting pipe 343, the first air chamber 342 supplies air into the second air chamber 344 so that the moving ring 500 in the second air chamber 344 can move, and the air in the second air chamber 344 is discharged from the vent hole 345.
It should be noted that, because a gap is formed between the moving ring 500 and the inner wall of the second air chamber 344, the air can pass through, and when the opening and closing frequency of the auxiliary valve core 300 reaches a preset value, and the air continuously enters the second air chamber 344, the moving ring 500 can continuously move to drive the stop lever 400 to move, so as to open the first through hole 350; when the gas entering the second air chamber 344 is less and slow, i.e. the opening and closing frequency of the auxiliary valve core 300 does not reach the preset value, after the moving ring 500 moves a distance, the moving ring falls to the initial state again under the action of gravity, and the stop lever 400 cannot be driven to move, i.e. the first through hole 350 cannot be opened.
Specifically, a piston rod 341 is disposed in the first air chamber 342, and the piston rod 341 reciprocates in the first air chamber 342 to pump air into the second air chamber 344, similar to an inflator. The first air chamber 342 is connected with a second connection pipe 346 at one end thereof remote from the first connection pipe 343, and the other end of the second connection pipe 346 communicates with the pressure release pipe 310 for exhausting air. The reciprocating movement of the piston rod 341 is driven by the movement of the auxiliary valve core 300, and a connecting plate 340 is fixedly arranged on the auxiliary valve core 300, and the connecting plate 340 is connected with one end of the piston rod 341. When the pressure fluctuation in the conveying pipeline is smaller, the auxiliary valve core 300 is decompressed by the auxiliary valve core 300, the auxiliary valve core 300 moves along the axial direction to the direction far away from the channel 130 so as to open the channel 130 for decompression, at the moment, the auxiliary valve core 300 drives the piston rod 341 to move in the first air chamber 342 so as to pump air in the second air chamber 344, and because a gap is formed between the moving ring 500 and the inner peripheral wall of the second air chamber 344, when air enters the second air chamber 344, the moving ring 500 slowly rises, but because of the action of the gap, the moving ring 500 rises a little distance and then descends. Only when the pressure in the conveying pipeline continuously increases, the frequency of opening and closing the auxiliary valve core 300 increases to reach a preset value, so that the frequency of the reciprocating movement of the piston rod 341 increases, and then the gas continuously enters the second air chamber 344, the rising speed of the moving ring 500 increases, after the moving ring 500 rises to a preset height (the preset height means that the moving ring 500 moves to be in contact with the baffle 430 at one end of the stop lever 400), the moving ring 500 drives the baffle 430 to continuously rise due to the fact that the gas continuously enters the second air chamber 344, and then the stop lever 400 moves in the first through hole 350 along the axial direction of the first through hole 350, the first baffle 410 is separated from the first through hole 350, the first through hole 350 is opened, the gas pressure in the first chamber 210 and the second chamber 320 is balanced, the pressure of the main valve core 200 and the auxiliary valve core 300 is the same, and when the pressure in the conveying pipeline continuously increases, the main valve core 200 is opened to perform pressure relief after the gas pressure reaches a safety pressure value set by the main valve core 200, so that the frequent pressure relief of the auxiliary valve core 300 is converted into one time of pressure relief of the main valve core 200, and frequent opening and closing of the auxiliary valve core 300 is avoided.
It should be noted that, the transmission assembly is not limited to the above structure, the transmission assembly may be an electric control cylinder, which drives the stop lever 400 to move along the axial direction of the first through hole 350 according to the frequency of the movement of the auxiliary valve core 300 to open or close the first through hole 350, specifically, one end of the electric control cylinder is connected to one end of the stop lever 400, and when the frequency of opening and closing the auxiliary valve core 300 does not reach the preset value, the electric control cylinder is not started, and the first through hole 350 is kept in a closed state; when the frequency of opening and closing the sub-valve core 300 reaches a preset value, the electronic control cylinder is started, and then the stop lever 400 is driven to move along the axial direction of the first through hole 350 to open the first through hole 350, so that the first chamber 210 and the second chamber 320 are communicated.
In a further embodiment, the pressure relief valve further includes a pressure control assembly 600, where the pressure control assembly 600 can control the pressure in the first chamber 210 to adjust the pressure required to open the main valve element 200, and can also control the pressure in the second chamber 320 to adjust the pressure required to open the auxiliary valve element 300.
Specifically, the pressure control assembly 600 includes at least two pressure gauges and gas delivery cylinders (not shown in the figure), in this embodiment, the valve body 100 is provided with a first gas delivery pipeline 220 and a second gas delivery pipeline 330, the first gas delivery pipeline 220 is communicated with the first chamber 210, the other end of the first gas delivery pipeline 220 is communicated with the gas delivery cylinder, the second gas delivery pipeline 330 is communicated with the second chamber 320, the other end of the second gas delivery pipeline 330 is also communicated with the gas delivery cylinder, the pressure gauges are disposed between the gas delivery cylinder and the gas delivery pipeline, the pressure gauges can detect the air pressure in the first chamber 210 and the second chamber 320, and when the air pressure in the first chamber 210 or the second chamber 320 is reduced, the air pressure can be increased by supplementing the air in the first chamber 210 or the second chamber 320 through the gas delivery cylinder.
For example, when the pressure in the conveying pipeline is gradually increased, the auxiliary valve core 300 is frequently opened and closed to release pressure, so as to drive the piston rod 341 to reciprocate in the first air chamber 342 to continuously pump the second air chamber 344, the moving ring 500 in the second air chamber 344 drives the baffle 430 to move to open the first through hole 350, so that a part of the air in the first chamber 210 enters the second chamber 320, the air pressure in the first chamber 210 and the air pressure in the second chamber 320 are balanced, and when the two chambers are communicated, the air pressure in the first chamber 210 is smaller, the pressure gauge detects that the air pressure in the first chamber 210 is reduced, and the air conveying bottle is opened to supplement the air to the first chamber 210, so that the air pressure in the first chamber 210 and the air pressure in the second chamber 320 are the same, and the air pressure at the moment is consistent with the air pressure when the first chamber 210 is not communicated with the second chamber 320.
In a further embodiment, the sealing tube 230 is further provided with a second through hole 351, the second through hole 351 is communicated with the second chamber 320 and the second gas transmission pipeline 330, the other end of the second gas transmission pipeline 330 is communicated with the gas transmission bottle, the second through hole 351 is provided with a second baffle 420, and the second baffle 420 can open or close the second through hole 351 to be communicated with or disconnected from the gas transmission bottle.
When the second through hole 351 is opened, the second gas transmission pipeline 330 is communicated with the second chamber 320, the gas transmission bottle can flush gas into the second chamber 320 through the second gas transmission pipeline 330, and the pressure gauge can detect the gas pressure in the second chamber 320; when the second through hole 351 is closed, the second gas transmission pipe 330 is disconnected from the second chamber 320, and the pressure gauge cannot detect the gas pressure in the second chamber 320. After the first through hole 350 is opened, the gas in the first chamber 210 enters the second chamber 320, the gas pressure in the second chamber 320 increases, at this time, the second through hole 351 is closed, only the first through hole 350 is opened, and the gas in the first chamber 210 is replenished by the gas bottle of the first gas transmission pipeline 220, so that the gas pressures in the first chamber 210 and the second chamber 320 are consistent. When the first through hole 350 is closed, the first chamber 210 and the second chamber 320 are isolated from each other, the second through hole 351 is opened, the second chamber 320 is communicated with the second gas transmission pipeline 330, the pressure gauge detects that the gas pressure in the second chamber 320 increases, and then the gas pressure in the second chamber 320 is adjusted, so that the gas pressure in the second chamber 320 is restored to the initial pressure value, and the gas pressures in the first chamber 210 and the second chamber 320 at this time are restored to the initial state.
It should be noted that, the second blocking piece 420 may be disposed on the blocking lever 400, the second blocking piece 420 initially opens the second through hole 351, the first blocking piece 410 closes the first through hole 350, when the blocking lever 400 moves, the first blocking piece 410 and the second blocking piece 420 can move synchronously, that is, when the blocking lever 400 moves upward as shown in fig. 6, the first blocking piece 410 opens the first through hole 350, and the second blocking piece 420 closes the second through hole; when the bar 400 is reset, i.e., moved downward, the first blocking piece 410 closes the first through hole 350 and the second blocking piece 420 opens the second through hole 351.
Of course, the second blocking piece 420 may also be electric, when the first through hole 350 is closed, the second blocking piece 420 detects that the first through hole 350 is closed, and the second blocking piece 420 automatically opens the second through hole 351; when the second blocking piece 420 detects that the first through hole 350 is opened, the second blocking piece 420 automatically blocks the second through hole 351.
In a further embodiment, the gas delivered by the gas delivering bottle is nitrogen, the nitrogen is inert gas, no chemical reaction occurs when the gas is compressed, the safety is high, and the nitrogen can be compressed to high pressure, which is advantageous in the application of high pressure gas.
In a further embodiment, the pressure relief valve can be applied to a direct-drinking machine, and a hot water conveying pipeline of the direct-drinking machine with the pressure relief valve can convey hot water stably, so that the condition that hot gas generated by conveying hot water affects the stable conveying of the pipeline is avoided.
The following describes a specific working process of the pressure release valve and the direct drinking machine with the pressure release valve provided by the application with reference to the above embodiments:
the inlet 110 of the valve body 100 is connected to a delivery pipe, the outlet 120 is connected to a collecting device (not shown), and the air pressure in the first chamber 210 of the main valve element 200 and the air pressure in the second chamber 320 of the sub valve element 300 are set according to the working condition and safety requirement of the delivery pipe, wherein the air pressure in the first chamber 210 is larger than the air pressure in the second chamber 320, that is, the force required for opening the main valve element 200 is larger than the force required for opening the sub valve element 300.
In the initial state, the first through hole 350 is in a closed state, i.e., the first chamber 210 and the second chamber 320 are isolated from each other, the second through hole 351 is in an open state, and the second chamber 320 is in communication with the second gas transmission pipe 330.
When the pressure fluctuation in the conveying pipeline causes the pressure to slowly increase, after the pressure reaches a safety pressure value set by opening the auxiliary valve core 300, the auxiliary valve core 300 is opened to release pressure, the auxiliary valve core 300 moves in the sealing pipe 230 so as to drive the piston rod 341 to move in the first air chamber 342, so that air is pumped into the second air chamber 344, the movable ring 500 in the second air chamber 344 moves upwards under the action of air, but because a gap is formed between the outer peripheral wall of the movable ring 500 and the inner peripheral wall of the second air chamber 344, a part of air passes through the gap, and the movable ring 500 starts to descend after a certain distance is raised in the second air chamber 344.
When the pressure in the conveying pipeline continuously increases, the auxiliary valve core 300 is frequently opened and closed to release pressure, when the frequency of opening and closing the auxiliary valve core 300 reaches a preset value, the frequency of the reciprocating movement of the piston rod 341 in the first air chamber 342 is increased when the auxiliary valve core 300 frequently moves, so that the gas entering the second air chamber 344 is continuously increased, and the movable ring 500 is continuously moved upwards. When the moving ring 500 moves to a predetermined height (the moving ring 500 contacts with the baffle 430 at one end of the blocking rod 400), the moving ring 500 continues to move upwards to drive the blocking rod 400 to move upwards along the axial direction of the first through hole 350, and further drive the first blocking piece 410 to move upwards along the axial direction of the first through hole 350, so that the first through hole 350 is opened, and simultaneously the second blocking piece 420 moves upwards along the axial direction of the second through hole 351, so that the second through hole 351 is closed, and the second chamber 320 can only enter gas through the first through hole 350. After the first through hole 350 is opened, the first chamber 210 is communicated with the second chamber 320, and due to the pressure difference between the two, the gas in the first chamber 210 enters into the second chamber 320 to balance the gas pressure of the two.
When the pressure in the first chamber 210 is reduced after the first chamber 210 is communicated with the second chamber 320, after the pressure gauge detects that the pressure gauge supplements nitrogen gas into the first chamber 210 to increase the pressure, the pressure in the first chamber 210 and the pressure in the second chamber 320 are increased to the original pressure in the first chamber 210 at the initial time, and the pressure in the first chamber 210 and the pressure in the second chamber 320 are the same. The contact area of the main valve core 200 with the gas in the first chamber 210 and the contact area of the auxiliary valve core 300 with the gas in the second chamber 320 are the same, so that the main valve core 200 and the auxiliary valve core 300 are equivalent to one valve core at this time, when the pressure in the conveying pipeline continues to increase, after the pressure exceeds the safety pressure value set by the main valve core 200, the main valve core 200 is opened for pressure relief, and after the pressure relief of the main valve core 200 is completed, the reset is performed. At this time, since the sub valve core 300 moves synchronously with the main valve core 200, the sub valve core 300 does not move relative to the main valve core 200, i.e. the piston rod 341 does not move in the first air chamber 342, so that no air enters the second air chamber 344, the moving ring 500 slowly descends, and the stop lever 400 resets under the action of gravity, so that the first stop piece 410 and the second stop piece 420 reset, i.e. the first stop piece 410 blocks the first through hole 350 again, and the first chamber 210 and the second chamber 320 are isolated from each other. The second baffle 420 is also reset, that is, the second baffle 420 does not block the second through hole 351, the second through hole 351 is communicated with the second chamber 320 and the second air conveying pipeline 330, the pressure gauge can detect the air pressure in the second chamber 320, and then the air pressure in the second chamber 320 is reduced, so that the air pressure is restored to the original air pressure.
The pressure fluctuation in the next conveying pipeline is performed according to the circulation, so that the conveying pipeline can be stably depressurized.
The second embodiment of the application also provides a direct drinking machine, which comprises the pressure release valve.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A pressure relief valve, comprising:
the valve body is hollow, and the two ends of the valve body are respectively provided with an inlet and an outlet;
a main spool located within the valve body, the main spool being axially movable along the valve body to open or close an inlet;
the main valve core is internally provided with a cavity, one end of the main valve core, which is close to the inlet, is provided with a channel, the channel is communicated with the inlet and the outlet, an auxiliary valve core is arranged in the cavity, and the auxiliary valve core can move along the axial direction of the main valve core so as to open or close the channel;
the pressure required to open the secondary spool is less than the pressure required to open the primary spool;
a first chamber is formed between the main valve core and the valve body, and a second chamber is formed between one end of the auxiliary valve core, which is far away from the channel, and the main valve core;
the second cavity is provided with a first through hole, the first cavity is communicated with the second cavity through the first through hole, in an initial state, the first through hole is blocked by the switch component, so that the first cavity is mutually isolated from the second cavity, the air pressure in the first cavity is larger than the air pressure in the second cavity, and after the opening and closing frequency of the auxiliary valve core reaches a preset value, the switch component stops blocking the first through hole, and the first cavity is communicated with the second cavity.
2. The pressure relief valve of claim 1, wherein the switch assembly comprises a first flap that is movable in an axial direction of the first through-hole to cause the first flap to block or unblock the first through-hole.
3. The pressure relief valve of claim 2, wherein the first flap is driven by a drive assembly to move axially along the first throughbore.
4. The pressure release valve according to claim 3, wherein the transmission assembly comprises a first air chamber and a second air chamber, a stop lever is arranged in the second air chamber, one end of the stop lever is connected with the first stop piece, a baffle plate is arranged at the other end of the stop lever, a moving ring is arranged in the second air chamber, the moving ring is sleeved on the stop lever and far away from the baffle plate, an air inlet is arranged below the second air chamber, which is close to the moving ring, the first air chamber is communicated with the second air chamber, a piston rod is arranged in the first air chamber, the auxiliary valve core is connected with the piston rod, a gap is reserved between the outer peripheral wall of the moving ring and the inner peripheral wall of the second air chamber, the moving ring is contacted with the baffle plate after moving to a preset height in the second air chamber, and the moving ring continuously moves to drive the baffle plate to axially move along the first through hole.
5. The pressure relief valve of claim 1, further comprising a pressure control assembly capable of controlling the magnitude of air pressure within the first chamber and the second chamber.
6. The pressure relief valve of claim 5, wherein the pressure control assembly comprises a gas cylinder disposed outside the valve body, the gas cylinder capable of delivering gas to the first and second chambers, and a pressure gauge disposed on the gas cylinder, the pressure gauge capable of detecting gas pressure within the first and second chambers.
7. The pressure release valve according to claim 6, wherein a second through hole is formed in the second chamber, the second through hole is communicated with the gas transmission bottle, a second baffle is arranged on the second through hole, and the second baffle can open or close the second through hole;
when the first baffle blocks the first through hole, the second baffle opens the second through hole; when the first through hole is opened by the first baffle plate, the second through hole is closed by the second baffle plate.
8. The pressure relief valve of claim 7, wherein the second flap is disposed on a stop lever that moves to enable synchronous movement of the first flap and the second flap.
9. The pressure relief valve of claim 6, wherein the gas delivered by the gas delivery bottle is nitrogen.
10. A drink-through machine comprising a pressure relief valve according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311148759.XA CN116877745B (en) | 2023-09-07 | 2023-09-07 | Pressure release valve and direct drinking machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311148759.XA CN116877745B (en) | 2023-09-07 | 2023-09-07 | Pressure release valve and direct drinking machine with same |
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| Publication Number | Publication Date |
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| CN116877745A true CN116877745A (en) | 2023-10-13 |
| CN116877745B CN116877745B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311148759.XA Active CN116877745B (en) | 2023-09-07 | 2023-09-07 | Pressure release valve and direct drinking machine with same |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2426023A1 (en) * | 1973-06-21 | 1975-01-16 | Atwood & Morrill Co Inc | STOP VALVE WITH PISTON |
| US4022247A (en) * | 1976-05-13 | 1977-05-10 | Rockwell International Corporation | Balanced valve with pressure sensing means |
| CN101520102A (en) * | 2008-02-25 | 2009-09-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Relive valve |
| CN112032376A (en) * | 2020-09-09 | 2020-12-04 | 陈建清 | Overload automatic cut-off safety valve |
| CN216590012U (en) * | 2021-12-17 | 2022-05-24 | 北京卓奥阀业有限公司 | Dynamic balance regulating valve |
| CN219035683U (en) * | 2022-12-26 | 2023-05-16 | 浙江金涛电气有限公司 | Direct-acting valve and coffee machine |
-
2023
- 2023-09-07 CN CN202311148759.XA patent/CN116877745B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2426023A1 (en) * | 1973-06-21 | 1975-01-16 | Atwood & Morrill Co Inc | STOP VALVE WITH PISTON |
| US4022247A (en) * | 1976-05-13 | 1977-05-10 | Rockwell International Corporation | Balanced valve with pressure sensing means |
| CN101520102A (en) * | 2008-02-25 | 2009-09-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Relive valve |
| EP2093467B1 (en) * | 2008-02-25 | 2017-06-21 | Volvo Construction Equipment Holding Sweden AB | Pressure control valve |
| CN112032376A (en) * | 2020-09-09 | 2020-12-04 | 陈建清 | Overload automatic cut-off safety valve |
| CN216590012U (en) * | 2021-12-17 | 2022-05-24 | 北京卓奥阀业有限公司 | Dynamic balance regulating valve |
| CN219035683U (en) * | 2022-12-26 | 2023-05-16 | 浙江金涛电气有限公司 | Direct-acting valve and coffee machine |
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| Publication number | Publication date |
|---|---|
| CN116877745B (en) | 2023-11-10 |
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