CN117386848B - Self-driven pneumatic valve of air cushion bed - Google Patents
Self-driven pneumatic valve of air cushion bed Download PDFInfo
- Publication number
- CN117386848B CN117386848B CN202311684162.7A CN202311684162A CN117386848B CN 117386848 B CN117386848 B CN 117386848B CN 202311684162 A CN202311684162 A CN 202311684162A CN 117386848 B CN117386848 B CN 117386848B
- Authority
- CN
- China
- Prior art keywords
- air
- chamber
- plunger
- control chamber
- channel
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Classifications
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0712—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising particular spool-valve sealing means
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
- F16K31/1245—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one valve
-
- 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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
Abstract
The invention provides a self-driven pneumatic valve of an air cushion bed, which comprises a valve body; the valve body comprises a first control chamber, a second control chamber, a first chamber and a second chamber; the first control chamber is communicated with the first chamber, the second control chamber is communicated with the second chamber, and a plunger is movably arranged between the first control chamber and the second control chamber; an air inlet channel is arranged on the valve body; the valve body is also provided with a first air leakage channel and a second air leakage channel; when the plunger is in the first position, the first air leakage channel is communicated with the first cavity through the plunger, the air inlet channel is communicated with the second cavity through the plunger, air in the second control chamber pushes the plunger to move, when the plunger moves to the second position, the second air leakage channel is communicated with the second cavity through the plunger, the air inlet channel is communicated with the first cavity through the plunger, and air in the first control chamber pushes the plunger to move reversely. The self-driven pneumatic valve of the air bed realizes self-driven alternate output by using a gas flow path design instead of an electric control method, and has a simple structure.
Description
Technical Field
The invention relates to the technical field of fluid working, in particular to a self-driven pneumatic valve of an air cushion bed.
Background
In the prior art, a plurality of groups of gas pipelines are used for gas supply, and gas pipelines at different positions on the mattress are alternately inflated and deflated by combining a gas pressure sensor with an electric control valve, wherein the electric control valve adopts a circuit board to control the switch of the gas pipelines, and the electric control valve is not a standard part and is difficult to manufacture and process, so that the maintenance difficulty of the electric control valve and the mattress at the later stage is improved, and the maintenance cost is increased.
In addition, part of the air cushion bed in the prior art also uses a crank-link mechanism as a driving piece, and compared with an air pump for air supply, the mode has the problems of large output pulse and unstable air supply, and can not realize the alternate inflation and deflation of the air transmission pipelines at different positions on the mattress.
Accordingly, there is a need for a new type of self-actuated pneumatic valve for an air mattress to solve the above-mentioned problems of the prior art.
Disclosure of Invention
The invention aims to provide a self-driven pneumatic valve of an air cushion bed, which solves at least one defect in the prior art, realizes alternate inflation and deflation by driving a plunger to reciprocate by air pressure, replaces an electric control method, reduces cost and the like.
To achieve the above object, the self-driven pneumatic valve for an air cushion bed of the present invention includes a valve body; the valve body comprises a first control chamber, a second control chamber, a first chamber and a second chamber; the first control chamber is communicated with the first chamber, the second control chamber is communicated with the second chamber, a plunger is movably arranged between the first control chamber and the second control chamber, one side of the plunger forms the cavity side wall of the first control chamber, and the other side forms the cavity side wall of the second control chamber; an air inlet channel is arranged on the valve body and is used for communicating with an air pump; the valve body is also provided with a first air leakage channel and a second air leakage channel, and the first air leakage channel and the second air leakage channel are both used for communicating with the external environment; when the plunger is located at a first position, the first air leakage channel is communicated with the first cavity through the plunger, the air inlet channel is communicated with the second cavity through the plunger, air in the second control chamber pushes the plunger to move, when the plunger moves to a second position, the second air leakage channel is communicated with the second cavity through the plunger, the air inlet channel is communicated with the first cavity through the plunger, and air in the first control chamber pushes the plunger to move reversely.
Further, a first through flow channel, a second through flow channel, a third through flow channel and a fourth through flow channel are arranged on the plunger, the first through flow channel and the fourth through flow channel are positioned at two ends of the plunger, and the second through flow channel and the third through flow channel are positioned between the first through flow channel and the fourth through flow channel; when the plunger is positioned at the first position, the first air leakage channel is communicated with the first chamber through the first through flow channel, and the air inlet channel is communicated with the second chamber through the third through flow channel; when the plunger is located at the second position, the second air leakage channel is communicated with the second chamber through the fourth through flow channel, and the air inlet channel is communicated with the first chamber through the second through flow channel.
Further, an intermediate plate is arranged in the valve body, one side of the intermediate plate forms a cavity bottom wall of the first cavity and a cavity top wall of the second cavity, the other side of the intermediate plate forms a cavity top wall of the first control chamber and a cavity top wall of the second control chamber, a first air hole and a second air hole are formed in the intermediate plate, the first air hole is communicated with the first cavity, and the second air hole is communicated with the second cavity; when the plunger is positioned at the first position, the first air leakage channel is communicated with the first air hole through the first through flow channel, and the air inlet channel is communicated with the second air hole through the third through flow channel; when the plunger is located at the second position, the second air leakage channel is communicated with the second air hole through the fourth through flow channel, and the air inlet channel is communicated with the first air hole through the second through flow channel.
Further, a first air leakage flow passage and a second air leakage flow passage are further arranged on the valve body, the first air leakage flow passage is communicated with the first air leakage passage, and the second air leakage flow passage is communicated with the second air leakage passage; when the plunger is positioned at the first position, the first air leakage flow passage is communicated with the first control chamber; the second bleed passage communicates with the second control chamber when the plunger is in the second position.
Further, the device also comprises two pressure relief valves, wherein one pressure relief valve is arranged on the middle plate to communicate the first chamber with the first control chamber and control the gas in the first chamber to be unidirectionally input into the first control chamber;
the other pressure relief valve is also arranged on the middle plate so as to communicate the second chamber with the second control chamber and control the gas in the second chamber to be unidirectionally input into the second control chamber.
Further, the pressure relief valve comprises a valve core, a pressure relief spring and a valve port sealing ring, a pressure relief hole is formed in the middle plate, the valve core is movably arranged in the pressure relief hole in a penetrating mode, and the pressure relief spring is sleeved outside the valve core and is respectively abutted to the valve core and the middle plate; and one end of the valve core, which is far away from the pressure release spring, penetrates out of the pressure release hole and is fixedly connected with the valve port sealing ring.
The pressure relief valve comprises a pressure regulating screw, a first wedge block and a second wedge block, wherein a channel is arranged in the middle plate, and the first wedge block is movably arranged in the channel in a penetrating way; the middle plate is provided with a groove surrounding the pressure relief hole, the groove is communicated with the channel, and the second wedge block is movably arranged in the groove and is abutted against the pressure relief spring; the pressure regulating screw penetrates through the side wall of the channel and is fixedly connected with the first wedge-shaped block and can drive the first wedge-shaped block to move along the channel, so that the first wedge-shaped block abuts against and pushes the second wedge-shaped block to squeeze the pressure relief spring.
Further, the pressure release valve may be a sealing film, a mounting hole is formed in the middle plate, the sealing film covers the mounting hole, the outer edge of the sealing film is in sealing connection with the middle plate, and a cross opening is formed in the sealing film corresponding to the mounting hole.
Further, sealing gaskets are arranged at two ends of the plunger, and the sealing gaskets are used for preventing gas in the first control chamber and the second control chamber from escaping from the plunger.
Further, a limiting piece is arranged in each of the first control chamber and the second control chamber, and the limiting piece abuts against the plunger when the plunger moves to the first position or the second position.
The self-driven pneumatic valve of the air cushion bed has the beneficial effects that:
the self-driven pneumatic valve of the air cushion bed drives the plunger to reciprocate by utilizing the air pressure in the first control chamber and the air pressure in the second control chamber under the air supply of the single air pump, so that the air pressure in the first chamber and the air pressure in the second chamber are changed, the air pressure in the first control chamber and the air pressure in the second control chamber are further changed, the self-feedback double-outlet alternate inflation and deflation are realized, the self-driven alternate output is realized by using the air flow path design instead of an electric control method, and the dual advantages of compact structure, stable operation and low manufacturing and maintenance cost of the device referencing the self-driven pneumatic valve of the air cushion bed are considered.
Drawings
FIG. 1 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in some embodiments provided by the present invention;
FIG. 2 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in a first position in some embodiments provided herein;
FIG. 3 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in a second position in some embodiments provided herein;
FIG. 4 is a cross-sectional view of a plunger in some embodiments provided by the present invention;
FIG. 5 is a cross-sectional view of a plunger in other embodiments provided by the present invention;
FIG. 6 is a cross-sectional view at A in FIG. 1;
FIG. 7 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in accordance with further embodiments of the present invention;
fig. 8 is a cross-sectional view at a in fig. 7.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items.
In view of the problems existing in the prior art, embodiments of the present invention provide a self-driven pneumatic valve for an air cushion bed, and detailed description of specific embodiments of the present invention will be given below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in some embodiments provided by the present invention.
Referring to fig. 1, in some embodiments of the present invention, a self-driven pneumatic valve of an air bed according to the present invention includes a valve body, the valve body includes a housing 1, an intermediate plate 2, a baffle 3 and a plunger 4, a chamber enclosed by the housing 1 includes a first chamber 11, a second chamber 12, a first control chamber 13 and a second control chamber 14, the intermediate plate 2 is located in the chamber enclosed by the housing 1, one side of the intermediate plate 2 serves as a bottom wall of the first chamber 11 and the second chamber 12, and the other side of the intermediate plate 2 serves as a top wall of the first control chamber 13 and the second control chamber 14; the baffle 3 is located in a chamber enclosed by the housing 1, the baffle 3 separates the first chamber 11 and the second chamber 12, and the baffle 3 serves as a chamber sidewall of the first chamber 11 and the second chamber 12. The first control chamber 13 communicates with the first chamber 11, and the second control chamber 14 communicates with the second chamber 12. A plunger 4 is movably arranged between the first control chamber 13 and the second control chamber 14, a first side 131 of the plunger 4 is a cavity side wall of the first control chamber 13, and a second side 141 of the plunger 4 is a cavity side wall of the second control chamber 14. The plunger 4 is movable back and forth between the first control chamber 13 and the second control chamber 14 to change the size of the first control chamber 13 and the second control chamber 14.
Referring to fig. 1, in some embodiments of the present invention, a first chamber 11 may be used to communicate with a first set of air bags (not shown), a second chamber 12 may be used to communicate with a second set of air bags (not shown), a first output hole 15 and a second output hole 16 are provided on the housing 1, and the first output hole 15 communicates with the first chamber 11 to communicate with the first chamber 11 and the first set of air bags; the second output hole 16 communicates with the second chamber 12 to communicate the second chamber 12 with the second group of air bags, and the first output hole 15 and the second output hole 16 are located at both ends of the same side of the housing 1. It should be noted that the first chamber 11 and the second chamber 12 in the present invention are not used only for communicating with the airbag.
Referring to fig. 1, in some embodiments of the present invention, an air inlet channel 17, a first air release channel 181 and a second air release channel 182 are further disposed on the housing 1, where the air inlet channel 17, the first air release channel 181 and the second air release channel 182 are located on a side of the housing 1 away from the first output hole 15 and the second output hole 16, and the first air release channel 181 and the second air release channel 182 are separately disposed on two sides of the air inlet channel 17.
FIG. 2 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in a first position in some embodiments provided herein; fig. 3 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in accordance with some embodiments of the present invention in a second position.
Referring to figures 1, 2 and 3, in some embodiments of the invention, when the plunger 4 is in the first position, the air inlet passage 17 communicates with the second chamber 12 for communicating with the air pump to input air to the second chamber 12 through the plunger 4 to raise the air pressure in the second chamber 12. The first gas release passage 181 communicates with the first chamber 11 to output the gas in the first chamber 11 to the external environment through the plunger 4, reducing the gas pressure of the first chamber 11.
Referring to figures 1, 2 and 3, in some embodiments of the invention, when the plunger 4 is in the second position, the air inlet channel 17 communicates with the first chamber 11 for communicating with the air pump to input air into the first chamber 11 through the plunger 4 to raise the air pressure in the first chamber 11. The second venting passage 182 communicates with the second chamber 12 to output the gas in the second chamber 12 to the external environment through the plunger 4, reducing the gas pressure in the second chamber 12.
Referring to fig. 1, 2 and 3, in some embodiments of the present invention, a first air hole 21 and a second air hole 22 are provided through the middle plate 2, the first air hole 21 communicates with the first chamber 11, and the second air hole 22 communicates with the second chamber 12. When the plunger 4 is in the first position, the gas inlet channel 17 may deliver gas from the second gas hole 22 to the second chamber 12 through the plunger 4. When the plunger 4 is in the second position, the gas inlet channel 17 may deliver gas from the first gas hole 21 to the first chamber 11 through the plunger 4.
Fig. 4 is a cross-sectional view of a plunger in some embodiments provided by the present invention.
Referring to fig. 1, 2, 3 and 4, in some embodiments of the present invention, a first through flow channel 41, a second through flow channel 42, a third through flow channel 43 and a fourth through flow channel 44 are provided on the plunger 4, the first through flow channel 41 and the fourth through flow channel 44 penetrate the plunger 4 and are dispersed at both ends of the plunger 4, and the second through flow channel 42 and the third through flow channel 43 penetrate the plunger 4 and are located between the first through flow channel 41 and the fourth through flow channel 44 and are disposed crosswise. When the plunger 4 is located at the first position, the first through flow channel 41 may be connected to the first air hole 21 and the first air leakage channel 181, so as to exhaust the air in the first chamber 11, and reduce the air pressure of the first chamber 11; the third through flow passage 43 may communicate the second air hole 22 with the air inlet passage 17 to input air into the second chamber 12 to raise the air pressure of the second chamber 12. When the plunger 4 is located at the second position, the second through flow passage 42 may communicate the first air hole 21 with the air inlet channel 17 to input air into the first chamber 11, and raise the air pressure of the first chamber 11; the fourth through flow passage 44 may communicate with the second air hole 22 and the second air release passage 182 to discharge the air in the second chamber 12 and reduce the air pressure in the second chamber 12.
Fig. 5 is a cross-sectional view of a plunger in other embodiments provided by the present invention.
Referring to fig. 5, in other embodiments of the present invention, a first plunger chamber 45, a second plunger chamber 46, a third plunger chamber 47, a fourth plunger chamber 48, and a fifth plunger chamber 49 are sequentially provided in the plunger 4. The second plunger chamber 46, the third plunger chamber 47, and the fourth plunger chamber 48 communicate with each other.
When the plunger 4 is located at the first position, the first plunger cavity 45 may be in communication with the first air hole 21 and the first air release channel 181 to discharge the air in the first chamber 11, so as to reduce the air pressure of the first chamber 11; the third plunger chamber 47 communicates with the second air hole 22 and the air intake passage 17 through the fourth plunger chamber 48 to input air into the second chamber 12 to raise the air pressure of the second chamber 12. When the plunger 4 is in the second position, the second plunger chamber 46 can communicate the first air hole 21 and the air inlet channel 17 through the fourth plunger chamber 48 to input air into the first chamber 11, and raise the air pressure of the first chamber 11; the fifth plunger cavity 49 may be in communication with the second vent 22 and the second vent passage 182 to vent the gas in the second chamber 12 to reduce the gas pressure in the second chamber 12.
Referring to fig. 1, 2 and 3, in some embodiments of the present invention, a first air release flow path 191 is disposed on the housing 1 adjacent to the first air release channel 181, one end of the first air release flow path 191 is in communication with the first air release channel 181, and when the plunger 4 is located at the first position, the other end of the first air release flow path 191 is disposed on the bottom wall of the first control chamber 13 and can be in communication with the first control chamber 13 to discharge the air in the first control chamber 13 to the outside, so as to reduce the air pressure in the first control chamber 13. A second air leakage flow passage 192 is arranged on the casing 1 adjacent to the second air leakage passage 182, one end of the second air leakage flow passage 192 is communicated with the second air leakage passage 182, and when the plunger 4 is positioned at the second position, the other end of the second air leakage flow passage 192 is arranged on the bottom wall of the second control chamber 14 and can be communicated with the second control chamber 14 to discharge air in the second control chamber 14 to the outside, so that the air pressure in the second control chamber 14 is reduced.
Referring to fig. 1, 2 and 3, in some embodiments of the present invention, two pressure relief valves 23 are provided on the intermediate plate 2, and one pressure relief valve 23 is provided on the intermediate plate 2 at a communication position between the first chamber 11 and the first control chamber 13, so as to control the gas in the first chamber 11 to flow unidirectionally into the first control chamber 13; a further pressure relief valve 23 is also provided in the intermediate plate 2 at the communication between the second chamber 12 and the second control chamber 14 to control the unidirectional flow of gas in the second chamber 12 into the second control chamber 14.
Fig. 6 is a cross-sectional view at a in fig. 1.
Referring to fig. 1 and 6, in some embodiments of the present invention, a relief hole 24 is provided on the middle plate 2, and the relief valve 23 includes a relief spring 231, a valve element 232 and a valve port sealing ring 233, where the valve element 232 movably penetrates through the relief hole 24. The pressure release spring 231 is arranged outside the valve core 232 in the first chamber 11 in a sleeved mode, one end of the pressure release spring 231 is fixedly connected with the valve core 232, the other end of the pressure release spring 231 is used for being abutted against the middle plate 2, and one end of the valve core 232, which penetrates through the pressure release hole 24 and is positioned in the first control chamber 13, is fixedly connected with the valve port sealing ring 233. In the initial state, the valve port sealing ring 233 abuts against the middle plate 2 to seal the pressure relief hole 24, the valve core 232 is pushed to move towards the first control chamber 13 along the axis of the pressure relief spring 231 under the action of air pressure, and the valve port sealing ring 233 is opened to enable air to flow from the first chamber 11 to the first control chamber 13. The two pressure relief valves 23 are identical in structure and in principle. The further relief valve 23 between the second control chamber 14 and the second chamber 12 is not described here in detail.
Referring to fig. 6, in some embodiments of the present invention, a relief valve adjusting member 25 is provided at the relief valve 23 to adjust the opening pressure of the relief valve 23. The pressure release valve adjusting member 25 comprises a pressure adjusting screw 251, a first wedge block 252 and a second wedge block 253, wherein a channel 26 is arranged in the middle plate 2 adjacent to the pressure release hole 24, the first wedge block 252 movably penetrates through the channel 26, and the pressure adjusting screw 251 penetrates through the side wall of the channel 26 to be fixedly connected with the first wedge block 252 and can drive the first wedge block 252 to move along the channel 26. The middle plate 2 is provided with a groove 27 around the pressure relief hole 24, the groove 27 is communicated with the channel 26 and the pressure relief hole 24, the second wedge 253 is movably arranged in the groove 27, the second wedge 253 is provided with a through hole for the valve core 232 to movably pass through, and the second wedge 253 is abutted against the pressure relief spring 231. The first wedge 252 and the second wedge 253 abut at the communication of the groove 27 and the channel 26. Tightening the pressure regulating screw 251, regulating the length of the pressure regulating screw 251 in the channel 26, so that the first wedge block 252 moves along the channel 26, further enabling the first wedge block 252 to push the second wedge block 253 to move to squeeze the pressure release spring 231, increasing the pretightening force of the pressure release valve 23, increasing the opening pressure of the pressure release valve 23, enabling the pressure of the pressure release valve 23 pushed by the air pressure to increase, and controlling the flow rate of air flowing from the first chamber 11 to the first control chamber 13. In some embodiments of the present invention, the contact surfaces of the first wedge 252 and the second wedge 253 are both inclined surfaces, and the contact surface with the second wedge 253 in the groove 27 is also inclined surface, so that the upper horizontal pushing force applied on the first wedge 252 is converted into the vertical pushing force applied on the second wedge 253, and the second wedge 253 presses the pressure release spring 231 along the axis of the valve core 232. A relief valve adjustment 25 is also provided at the other relief valve 23 between the second control chamber 14 and the second chamber 12, which is not described here again.
FIG. 7 is a cross-sectional view of a self-actuated pneumatic valve of an air bed in accordance with further embodiments of the present invention; fig. 8 is a cross-sectional view at a in fig. 7.
Referring to fig. 7 and 8, in other embodiments of the present invention, the pressure release valve 23 may be a sealing film, the middle plate 2 is provided with a mounting hole 28, the sealing film covers the mounting hole 28, the outer edge of the sealing film is in sealing connection with the middle plate 2, and the sealing film is provided with a cross opening corresponding to the mounting hole 28, and the cross opening corresponds to the center of the mounting hole 28. The cross opening is opened from the gas pressure of the gas in the first chamber 11 to allow the gas in the first chamber 11 to flow unidirectionally into the first control chamber 13. In some embodiments of the invention, the sealing membrane is a flexible sealing membrane, and the flow rate of the gas from the first chamber 11 to the first control chamber 13 is adjusted by adjusting the elastic deformability of the flexible sealing membrane material. The other pressure release valve 23 located between the second control chamber 14 and the second chamber 12 may also be a sealing membrane, which is not described here again.
Referring to fig. 1, 2 and 3, in some embodiments of the present invention, a gasket 29 is disposed in each of the first control chamber 13 and the second control chamber 14, the gasket 29 is sleeved on the plunger 4, and the contact between the plunger 4 and the intermediate plate 2 and the bottom wall of the first control chamber 13 is sealed to prevent gas in the first control chamber 13 from escaping from the gap between the plunger 4 and the intermediate plate 2, and to prevent gas in the first control chamber 13 from escaping from the gap between the plunger 4 and the bottom wall of the first control chamber 13. The gasket 29 in the second control chamber 14 is identical in structure and function to the gasket 29 in the first control chamber 13 and will not be described again.
Referring to fig. 1, 2 and 3, in some embodiments of the present invention, the first control chamber 13 and the second control chamber 14 are each provided with a stopper 5, and when the plunger 4 moves to the second position in the first control chamber 13, the stopper 5 in the first control chamber 13 abuts against the plunger 4 to restrict the plunger 4 from continuing to move in the first control chamber 13; when the plunger 4 moves to the first position in the second control chamber 14, the stopper 5 in the second control chamber 14 abuts the plunger 4 to restrict the plunger 4 from continuing to move in the second control chamber 14.
Referring to fig. 1, 2, 3 and 7, in some embodiments of the present invention, a locking structure 6 is provided between the plunger 4 and the intermediate plate 2, so that the plunger 4 does not deviate when moving from the first position to the second position or from the second position to the first position, so as to avoid that the air inlet channel 17 and the second through flow channel 42 or the third through flow channel 43 are misplaced when communicating and cannot communicate. The side of the plunger 4 facing the intermediate plate 2 is provided with a locking block 61 and the side of the intermediate plate 2 facing the plunger is provided with a locking groove 62 corresponding to the locking block, and the plunger 4 moves from the first position to the second position or vice versa, driving the locking block 61 to move back and forth in the locking groove 62. In other embodiments of the invention, the locking blocks 61 may be provided on the side of the intermediate plate 2 facing the plunger, and the locking grooves 62 provided corresponding to the locking blocks 61 may be provided on the side of the plunger 4 facing the intermediate plate 2.
In summary, in the initial state, the plunger 4 is located at the first position, the plunger 4 abuts against the limiting member 5 in the second control chamber 14, the second air release flow passage 192 and the second air release passage 182 are both blocked by the plunger 4, the air intake passage 17 is connected with the air pump to convey air into the second chamber 12 sequentially through the third through flow passage 43 and the second air hole 22, air is supplied to the second group of air bags, when the air pressure in the second chamber 12 and the air pressure in the second group of air bags reach a predetermined value, the air pressure in the second chamber 12 is greater than the air pressure in the second control chamber 14, the air in the second chamber 12 presses the second control chamber 14 and the pressure release spring 231 of the pressure release valve 23 in the second chamber 12, the valve port sealing ring 233 is opened, the pressure release valve 23 is opened, the air enters the second control chamber 14 from the second chamber 12 through the pressure release hole 24, the air pressure in the second control chamber 14 is increased, and the plunger 4 is pushed to move towards the first control chamber 13. The gas in the first control chamber 13 is extruded in the initial moving process of the plunger 4, the volume of the gas in the first control chamber 13 is reduced, the air pressure is increased, the gas in the first control chamber 13 flows out of the first air leakage flow channel 191, when the plunger 4 still does not reach the second position after moving for a period of time, the second control chamber 14 is communicated with the second air leakage flow channel 192, the gas in the second control chamber 14 is continuously discharged out of the second air leakage channel 182, the third through flow channel 43 is staggered with the second air hole 22 and the air inlet channel 17, the air in the second chamber 12 is not fed any more, the fourth through flow channel 44 is gradually communicated with the second air hole 22 and the second air leakage channel 182, the gas in the second chamber 12 is discharged, the air pressure in the second chamber 12 is reduced, the pressure relief valve 23 is gradually closed, and the gas does not enter the second control chamber 14 from the second chamber 12 any more. After the plunger 4 moves to the second position, the plunger 4 abuts against the limiting member 5 in the first control chamber 13, so that the plunger 4 is no longer moved away from the limiting member 5 in the second control chamber 14, and the gas in the second control chamber 14 completely flows out of the second venting channel 182, so that the air pressure in the second control chamber 14 is kept consistent with the external air pressure.
When the plunger 4 moves to the second position, the air pressure in the second control chamber 14 and the second chamber 12 are consistent with the outside, the first air leakage flow channel 191 and the first air leakage channel 181 are blocked by the plunger 4, the air inlet channel 17 is connected with the air pump to convey air into the first chamber 11 sequentially through the second through flow channel 42 and the first air hole 21, the air is supplied to the first group of air bags, when the air pressure in the first chamber 11 and the air pressure in the first group of air bags reach a preset value, the air pressure in the first chamber 11 is larger than the air pressure in the first control chamber 13, the air in the first chamber 11 presses the first control chamber 13 and the pressure release spring 231 of the pressure release valve 23 in the first chamber 11, the valve port sealing ring 233 is opened, the pressure release valve 23 is opened, the air enters the first control chamber 13 from the first chamber 11 through the pressure release hole 24, the air pressure in the first control chamber 13 is increased, and the plunger 4 is pushed to move reversely to the second control chamber 14. The gas in the second control chamber 14 is squeezed again in the initial process of the reverse movement of the plunger 4, the volume of the gas in the second control chamber 14 is reduced, the gas pressure is increased, the gas in the second control chamber 14 flows out of the second air release flow passage 192 again, when the plunger 4 does not reach the first position after a period of time of reverse movement, the first control chamber 13 is communicated with the first air release flow passage 191, the gas in the first control chamber 13 is continuously discharged out of the first air release passage 181, the second through flow passage 42 is staggered with the first air hole 21 and the air inlet passage 17, no air is introduced into the first chamber 11, the first through flow passage 41 is gradually communicated with the first air hole 21 and the first air release passage 181, the gas in the first chamber 11 is discharged, the gas pressure in the first chamber 11 is reduced, the pressure release valve 23 is gradually closed, and the gas does not enter the first control chamber 13 from the first chamber 11. After the plunger 4 moves reversely to the first position, the plunger 4 abuts against the limiting piece 5 in the second control chamber 14, so that the plunger 4 does not move away from the limiting piece 5 in the first control chamber 13 any more, and the gas in the first control chamber 13 completely flows out of the first air release channel 181, so that the air pressure in the first control chamber 13 is consistent with the external air pressure.
After the plunger 4 moves reversely to the first position, the air pressure in the first control chamber 13 and the first chamber 11 is consistent with the outside, the plunger 4 repeats the moving process by continuously providing the air by the air pump, and the air is alternately pumped from the air inlet channel 17 to the first air release channel 181 and the second air release channel 182, so that the first chamber 11 and the second chamber 12 are alternately inflated and deflated, and the self-driven alternate output of different air pipelines is realized instead of an electric control method.
Notably, during the above-described movement: the flow rate of the gas in the second leakage flow channel 192 is smaller than the flow rate of the gas in the pressure release valve 23 in the second control chamber 14, so that the second control chamber 14 can push the plunger 4 to move when the gas pressure is still present in a state of being communicated with the second leakage flow channel 192; the flow rate of the gas in the first bleed air flow path 191 is smaller than the flow rate of the gas in the relief valve 23 in the first control chamber 13 so that the plunger 4 is pushed to move by the presence of the gas pressure in the first control chamber 13 in a state of being communicated with the first bleed air flow path 191.
In some embodiments of the invention, the first side 131 of the plunger 4 has a limit travel distance in the first control chamber 13 ofFirst side 131 of plunger 4 is horizontally spaced from first bleed air flow path 191 by +.>And->. So arranged, in the latter half of the movement of the plunger 4 from the second position to the first position, the first bleed air flow path 191 communicates with the first control chamber 13, venting the gas in the first control chamber 13, lowering the pressure in the first control chamber 13Air pressure; in the first half of the movement of the plunger 4 from the first position to the second position, the volume of the first control chamber 13 is reduced, the volume of the gas in the first control chamber 13 is reduced, the gas pressure is increased, and the gas in the first control chamber 13 flows out of the first leakage flow path 191 again, so that the plunger 4 is more easily pushed by the gas in the second control chamber 14.
In some embodiments of the invention, the second side 141 of the plunger 4 has a limiting travel distance in the second control chamber 14 ofThe second side 141 of the plunger 4 is horizontally spaced from the second leakage flow path 192 by +.>And->. So configured, the second bleed air passage 192 communicates with the second control chamber 14 to vent air in the second control chamber 14 and to reduce the air pressure in the second control chamber 14 during the second half of the movement of the plunger 4 from the first position to the second position; in the first half of the movement of the plunger 4 from the second position to the first position, the volume of the second control chamber 14 is reduced, the volume of the gas in the second control chamber 14 is reduced, the gas pressure is increased, and the gas in the second control chamber 14 flows out of the second leakage flow passage 192 again, so that the plunger 4 is more easily pushed by the gas in the first control chamber 13.
While embodiments of the present invention have been described in detail hereinabove, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. It is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (8)
1. The self-driven pneumatic valve of the air cushion bed is characterized by comprising a valve body and two pressure relief valves;
the valve body comprises a first control chamber, a second control chamber, a first chamber and a second chamber;
the first control chamber is communicated with the first chamber, the second control chamber is communicated with the second chamber, a plunger is movably arranged between the first control chamber and the second control chamber, one side of the plunger forms the cavity side wall of the first control chamber, and the other side forms the cavity side wall of the second control chamber;
an air inlet channel is arranged on the valve body and is used for communicating with an air pump; the valve body is also provided with a first air leakage channel and a second air leakage channel, and the first air leakage channel and the second air leakage channel are both used for communicating with the external environment;
when the plunger is positioned at a first position, the first air leakage channel is communicated with the first chamber through the plunger, the air inlet channel is communicated with the second chamber through the plunger, the air in the second control chamber pushes the plunger to move, when the plunger moves to a second position, the second air leakage channel is communicated with the second chamber through the plunger, the air inlet channel is communicated with the first chamber through the plunger, and the air in the first control chamber pushes the plunger to reversely move;
an intermediate plate is arranged in the valve body, and one pressure relief valve is arranged on the intermediate plate to communicate the first chamber with the first control chamber and control the gas in the first chamber to be unidirectionally input into the first control chamber; the other pressure relief valve is also arranged on the middle plate to communicate the second chamber with the second control chamber and control the gas in the second chamber to be unidirectionally input into the second control chamber;
and limiting pieces are arranged in the first control chamber and the second control chamber, and are abutted with the plunger when the plunger moves to the first position or the second position.
2. The self-driven pneumatic valve of an air bed according to claim 1, wherein a first through flow passage, a second through flow passage, a third through flow passage and a fourth through flow passage are provided on the plunger, the first through flow passage and the fourth through flow passage being located at both ends of the plunger, the second through flow passage and the third through flow passage being located between the first through flow passage and the fourth through flow passage;
when the plunger is positioned at the first position, the first air leakage channel is communicated with the first chamber through the first through flow channel, and the air inlet channel is communicated with the second chamber through the third through flow channel;
when the plunger is located at the second position, the second air leakage channel is communicated with the second chamber through the fourth through flow channel, and the air inlet channel is communicated with the first chamber through the second through flow channel.
3. The self-driven pneumatic valve of an air mattress bed according to claim 2, wherein one side of the middle plate forms a cavity bottom wall of the first cavity and the second cavity, the other side forms a cavity top wall of the first control chamber and the second control chamber, a first air hole and a second air hole are arranged on the middle plate, the first air hole is communicated with the first cavity, and the second air hole is communicated with the second cavity;
when the plunger is positioned at the first position, the first air leakage channel is communicated with the first air hole through the first through flow channel, and the air inlet channel is communicated with the second air hole through the third through flow channel;
when the plunger is located at the second position, the second air leakage channel is communicated with the second air hole through the fourth through flow channel, and the air inlet channel is communicated with the first air hole through the second through flow channel.
4. The self-actuated pneumatic valve of an air bed as recited in claim 1, wherein said valve body is further provided with a first bleed passage and a second bleed passage, said first bleed passage being in communication with said first bleed passage, said second bleed passage being in communication with said second bleed passage;
when the plunger is positioned at the first position, the first air leakage flow passage is communicated with the first control chamber;
the second bleed passage communicates with the second control chamber when the plunger is in the second position.
5. The self-driven pneumatic valve of the air cushion bed according to claim 1, wherein the pressure relief valve comprises a valve core, a pressure relief spring and a valve port sealing ring, a pressure relief hole is formed in the middle plate, the valve core is movably arranged in the pressure relief hole in a penetrating mode, and the pressure relief spring is sleeved outside the valve core and respectively abutted with the valve core and the middle plate;
and one end of the valve core, which is far away from the pressure release spring, penetrates out of the pressure release hole and is fixedly connected with the valve port sealing ring.
6. The self-driven pneumatic valve of an air bed according to claim 5, further comprising a pressure relief valve adjusting member comprising a pressure adjusting screw, a first wedge block and a second wedge block, wherein a channel is arranged in the middle plate, and the first wedge block is movably arranged in the channel in a penetrating manner;
the middle plate is provided with a groove surrounding the pressure relief hole, the groove is communicated with the channel, and the second wedge block is movably arranged in the groove and is abutted against the pressure relief spring;
the pressure regulating screw penetrates through the side wall of the channel and is fixedly connected with the first wedge-shaped block and can drive the first wedge-shaped block to move along the channel, so that the first wedge-shaped block abuts against and pushes the second wedge-shaped block to squeeze the pressure relief spring.
7. The self-driven pneumatic valve of an air cushion bed according to claim 1, wherein the pressure release valve is a sealing film, a mounting hole is formed in the middle plate, the sealing film covers the mounting hole, the outer edge of the sealing film is in sealing connection with the middle plate, and a cross opening is formed in the sealing film corresponding to the mounting hole.
8. The self-actuated pneumatic valve of an air mattress according to claim 1, wherein both ends of said plunger are provided with seals for preventing gas in said first and second control chambers from escaping from said plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311684162.7A CN117386848B (en) | 2023-12-11 | 2023-12-11 | Self-driven pneumatic valve of air cushion bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311684162.7A CN117386848B (en) | 2023-12-11 | 2023-12-11 | Self-driven pneumatic valve of air cushion bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117386848A CN117386848A (en) | 2024-01-12 |
| CN117386848B true CN117386848B (en) | 2024-02-27 |
Family
ID=89437708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311684162.7A Active CN117386848B (en) | 2023-12-11 | 2023-12-11 | Self-driven pneumatic valve of air cushion bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117386848B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM274857U (en) * | 2004-12-27 | 2005-09-11 | Chin-Chu Liu | Pneumatic valve structure of air cushion bed |
| CN200982472Y (en) * | 2006-10-25 | 2007-11-28 | 雃博股份有限公司 | Gas-valve for quick air escape |
| CN103565597A (en) * | 2013-11-25 | 2014-02-12 | 陈王丽 | Automatic body-turning air cushion bed |
| CN106555890A (en) * | 2015-09-25 | 2017-04-05 | 台欣国际股份有限公司 | Air inlet switching valve with pressure release regulatory function |
| CN107361938A (en) * | 2017-08-21 | 2017-11-21 | 河北爱西欧医疗设备科技有限公司 | Air bed and its charge and discharge pneumatic control method with body turning function |
| CN112154269A (en) * | 2018-03-30 | 2020-12-29 | 德卡产品有限公司 | Liquid pumping cassette and associated pressure distribution manifold and related methods |
-
2023
- 2023-12-11 CN CN202311684162.7A patent/CN117386848B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM274857U (en) * | 2004-12-27 | 2005-09-11 | Chin-Chu Liu | Pneumatic valve structure of air cushion bed |
| CN200982472Y (en) * | 2006-10-25 | 2007-11-28 | 雃博股份有限公司 | Gas-valve for quick air escape |
| CN103565597A (en) * | 2013-11-25 | 2014-02-12 | 陈王丽 | Automatic body-turning air cushion bed |
| CN106555890A (en) * | 2015-09-25 | 2017-04-05 | 台欣国际股份有限公司 | Air inlet switching valve with pressure release regulatory function |
| CN107361938A (en) * | 2017-08-21 | 2017-11-21 | 河北爱西欧医疗设备科技有限公司 | Air bed and its charge and discharge pneumatic control method with body turning function |
| CN112154269A (en) * | 2018-03-30 | 2020-12-29 | 德卡产品有限公司 | Liquid pumping cassette and associated pressure distribution manifold and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117386848A (en) | 2024-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3745427B2 (en) | Slow exhaust valve for vacuum pressure control | |
| CA2397895A1 (en) | Combined pressure regulator and shut-off valve | |
| KR960023955A (en) | 2 stage niling valve | |
| CN216142768U (en) | Electro-hydraulic control proportional reversing valve | |
| CN117386848B (en) | Self-driven pneumatic valve of air cushion bed | |
| US8496454B2 (en) | Unloader system and method for a compressor | |
| JPH04276196A (en) | Screw compressor | |
| US3667502A (en) | Self-recycling actuator and valve incorporating it | |
| CN105317666A (en) | Pneumatic diaphragm pump | |
| CN111895150A (en) | Overflow pressure reduction output structure and plate-connected overflow pressure reduction valve | |
| CN1512079A (en) | Electromagnetic valve for reducing energy consumption | |
| CN201517641U (en) | Stroke control gear shifting box operating valve | |
| KR20070012360A (en) | Controller | |
| CN113503382B (en) | Automatic reversing valve with aperture self-control function for lubricating system | |
| CN112594428B (en) | Pressure regulating system and pressure regulating method | |
| CN212718014U (en) | Gas pressure reducer | |
| US6073655A (en) | High pressure/vacuum isolation apparatus and method | |
| US10808852B2 (en) | Check valve and system for continuous supply of ink to printer | |
| KR100317585B1 (en) | Hydraulic piston actuator | |
| US3592227A (en) | Fluid pressure control valve unit | |
| CN217558516U (en) | Pneumatic double-diaphragm pump | |
| CN220828525U (en) | Two-stage shutoff valve | |
| CN218882650U (en) | Hydraulic system and operating table | |
| CN218598864U (en) | High-pressure diaphragm valve | |
| CN114320847B (en) | Pneumatic metering pump capable of realizing automatic pressure holding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |