CN109838370B - Diaphragm pump - Google Patents
Diaphragm pump Download PDFInfo
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- CN109838370B CN109838370B CN201711229319.1A CN201711229319A CN109838370B CN 109838370 B CN109838370 B CN 109838370B CN 201711229319 A CN201711229319 A CN 201711229319A CN 109838370 B CN109838370 B CN 109838370B
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- Prior art keywords
- pressure relief
- diaphragm pump
- upper cover
- channel
- relief valve
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- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 7
- 239000002775 capsule Substances 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The invention discloses a diaphragm pump, comprising: an upper cover assembly defining an inlet chamber and an outlet chamber, the outlet chamber having an outlet and a pressure relief vent, the upper cover assembly comprising: the upper cover is provided with an air outlet channel and a pressure relief channel, and the air outlet channel is communicated with the air outlet chamber; the pressure relief valve is movably arranged in the pressure relief channel and used for opening or closing the pressure relief opening, the pressure relief valve is provided with a buffer part, a closing part and a fixing part, wherein the closing part and the fixing part are connected to the two ends of the buffer part, and the buffer part is used for reducing collision sound of the pressure relief valve in the moving process. According to the diaphragm pump provided by the embodiment of the invention, the buffer part is arranged at the lower part of the pressure relief valve, so that the friction and collision force of the pressure relief valve in the moving process are reduced, and the working noise of the diaphragm pump is effectively reduced.
Description
Technical Field
The invention relates to the technical field of pumps, in particular to a diaphragm pump.
Background
The traditional diaphragm pump has large working noise when pressure is released, and uncomfortable feeling is brought to users.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the above technical problems.
To this end, the invention proposes a diaphragm pump which operates with low noise.
A diaphragm pump according to an embodiment of the present invention includes: an upper cover assembly defining an inlet chamber and an outlet chamber, the outlet chamber having an outlet and a pressure relief vent, the upper cover assembly comprising: the upper cover is provided with an air outlet channel and a pressure relief channel, and the air outlet channel is communicated with the air outlet chamber; the pressure relief valve is movably arranged in the pressure relief channel and used for opening or closing the pressure relief opening, the pressure relief valve is provided with a buffer part, a closing part and a fixing part, wherein the closing part and the fixing part are connected to the two ends of the buffer part, and the buffer part is used for reducing collision sound of the pressure relief valve in the moving process.
According to the diaphragm pump provided by the embodiment of the invention, the buffer part is arranged at the lower part of the pressure relief valve, so that the friction and collision force of the pressure relief valve in the moving process are reduced, and the working noise of the diaphragm pump is effectively reduced.
In addition, the diaphragm pump according to the embodiment of the invention can also have the following additional technical characteristics:
according to some embodiments of the invention, the diaphragm pump further comprises: and the elastic component is stopped against the upper surface of the pressure relief valve.
According to some embodiments of the invention, the elastic assembly comprises: bushing, pressure spring and locating part. The bushing defines a movable cavity; one end of the pressure spring is stopped against the upper surface of the pressure relief valve; the limiting piece is clamped in the movable cavity, and the other end of the pressure spring extends upwards along the extending direction of the movable cavity and is stopped against the lower end face of the limiting piece.
According to some embodiments of the invention, a positioning protrusion is formed on the upper surface of the sealing part in an upward extending manner, and one end of the pressure spring is wound on the positioning protrusion.
According to some embodiments of the invention, the elastic assembly further comprises: the fixing seat is sleeved on the outer peripheral surface of the positioning protrusion, a positioning flange is formed by extending the lower end periphery of the fixing seat outwards, and the lower surface of the positioning flange is attached to the upper surface of the sealing part.
According to some embodiments of the invention, the peripheral wall of the movable chamber is formed with a plurality of guide ribs extending in the axial direction.
According to some embodiments of the invention, the fixing portion is formed with an annular sleeve extending upward along a circumferential edge thereof, and the annular sleeve is wound around an outer circumferential wall of the bushing.
According to some embodiments of the invention, the annular sleeve has a plurality of notches formed in its peripheral wall, and the bushing has a plurality of lugs formed in its peripheral wall, the lugs being retained in the notches.
According to some embodiments of the invention, the diaphragm pump further comprises: the upper cover assembly is provided with a first backflow hole, the upper cover is provided with an air inlet channel, the piston assembly is provided with a second backflow hole communicated with the first backflow hole, and the driving assembly is provided with a pump membrane cavity, wherein the first backflow hole is communicated with the pressure release channel, and the second backflow hole is communicated with the air inlet channel.
According to some embodiments of the invention, the first reflow hole is disposed opposite to the notch from top to bottom, a bottom surface of the notch is spaced from a lower surface of the latch protrusion by a predetermined distance, and a plurality of air outlet through holes are formed in a circumferential direction of the buffer portion.
According to some embodiments of the invention, a plurality of supporting tables are arranged on the bottom surface of the pressure relief channel at intervals, and the fixing part is lapped on the supporting tables.
According to some embodiments of the invention, the lower end face of the closing portion is provided with an annular lip, the radial dimension of which is greater than the radial dimension of the pressure relief opening.
According to some embodiments of the invention, the cushioning portion is a thin film made of a flexible material.
According to some embodiments of the invention, the buffer is a flat plate or an arcuate plate.
According to some embodiments of the invention, the thickness of the buffer portion is less than the thickness of the closure portion and the securing portion.
According to some embodiments of the invention, the upper end edge of the bushing is formed with a limit flange extending outwardly, and the limit flange is fitted to the upper end edge of the pressure release channel.
According to some embodiments of the invention, the bottom of the limit flange is provided with a locating hole, and the upper cover is provided with a locating column matched with the locating hole.
According to some embodiments of the invention, the upper cover is provided with a third backflow hole, which communicates with the intake chamber.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a cross-sectional view of a diaphragm pump according to one embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a top view of an upper cover according to one embodiment of the invention;
FIG. 4 is a top view of an upper cover according to one embodiment of the invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a partial cross-sectional view of a diaphragm pump according to one embodiment of the invention;
FIG. 7 is a perspective view of a pressure relief valve according to an embodiment of the present invention;
FIG. 8 is a perspective view of a pressure relief valve according to another embodiment of the present invention;
FIG. 9 is a perspective view of a pressure relief valve according to another embodiment of the present invention;
FIG. 10 is a cross-sectional view of FIG. 9;
FIG. 11 is a perspective view of a pressure relief valve according to another embodiment of the present invention;
FIG. 12 is a perspective view of a pressure relief valve according to another embodiment of the present invention;
Fig. 13 is a perspective view of a bushing according to another embodiment of the invention.
Reference numerals:
A diaphragm pump 100;
an upper cover assembly 10; an intake chamber 11; a gas outlet chamber 12; an air outlet 121; pressure relief vent 122; an air outlet channel 13; a pressure relief channel 14; a support table 141; a first pressure relief passage 142; a second pressure relief channel 143; a first reflow hole 15; an upper cover 16; a positioning column 161; a third reflow hole 162; a valve plate 17; a valve seat 18; an intake passage 19;
A pressure relief valve 20; a buffer section 21; an air outlet through hole 211; a closing portion 22; positioning projections 221; an annular lip 222; a fixing portion 23; an annular sleeve 231; notch 2311;
An elastic member 30; a bushing 31; a limit flange 311; positioning holes 3111; a snap tab 312; a movable chamber 32; a guide rib 321; a compression spring 33; a stopper 34; a fixing base 35; a positioning flange 351;
a piston assembly 40; a mounting seat 41; an air bag 42; a substrate 421; a bladder cavity 422; and a second reflow hole 43.
A drive assembly 50; a drive motor 51; a drive shaft 52; a link assembly 53; pump membrane chamber 54.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The diaphragm pump in the related art can generate pop airflow sound in the pressure release process, so that uncomfortable feeling is brought to a user, and particularly when the diaphragm pump is applied to a car seat, the pressure release airflow sound is obvious due to the quiet carriage environment.
A diaphragm pump 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 13, and the diaphragm pump 100 is widely used in the fields of medical instruments, home appliances, car seats, and the like. As shown in fig. 1, the diaphragm pump 100 may generally include: upper cap assembly 10, piston assembly 40 and drive assembly 50.
Specifically, as shown in fig. 1 in combination with fig. 5, the upper cover assembly 10 includes: upper cover 16, valve plate 17 and valve seat 18, upper cover assembly 10 defines an inlet chamber 11 and an outlet chamber 12, outlet chamber 12 having an outlet port 121 and a relief port 122. The upper cover 16 has an air outlet channel 13 and a pressure release channel 14, the air outlet channel 13 is communicated with the air outlet chamber 12, a pressure release valve 20 is disposed at a pressure release opening 122 of the air outlet chamber 12, and the pressure release valve 20 is movably disposed in the pressure release channel 14 for opening or closing the pressure release opening 122. The relief valve 20 has a buffer portion 21, and the buffer portion 21 can reduce friction and collision force between the relief valve 20 and the relief channel 14 during movement, thereby effectively reducing working noise of the diaphragm pump 100.
As shown in fig. 1, the valve seat 18 is provided with an air inlet hole and an air outlet hole, and the valve plate 17 is provided with an air inlet one-way valve corresponding to the air inlet hole and an air outlet one-way valve corresponding to the air outlet hole.
As shown in fig. 1, the piston assembly 40 includes a mounting seat 41 and an air bag 42, the mounting seat 41 has a mounting hole, the air bag 42 has a substrate 421, and a plurality of bag cavities 422 are formed on the upper surface of the substrate 421 by recessing downward, wherein the substrate 421 is attached to the surface of the mounting seat 41, and the bag cavities 422 penetrate through the mounting hole.
As shown in fig. 1, the driving assembly 50 includes a driving motor 51, a driving shaft 52 and a link assembly 53, a driving shaft of the driving motor 51 is connected with one end of the driving shaft 52, the other end of the driving shaft 52 is connected with the link assembly 53, and the link assembly 53 is connected with the piston assembly 40 to drive the bladder 422 to stretch or squeeze.
The diaphragm pump 100 operates as follows: when the connecting rod assembly 53 stretches the capsule 422, the volume of the capsule 422 increases, gas is sucked into the air inlet chamber 11, the air inlet one-way valve is opened, and the gas enters the capsule 422 to complete the air suction process; when the connecting rod assembly 53 extrudes the capsule cavity 422, the volume of the capsule cavity 422 is reduced, the air outlet one-way valve is opened, air flows out of the capsule cavity 422 and flows into the air outlet chamber 12 through the air outlet 121, and finally flows out of the air outlet 121, so that the air exhaust process is completed; when the pressure in the air outlet chamber 12 exceeds a predetermined pressure, the pressure release valve 20 is opened to at least partially release the air from the air outlet chamber 12, thereby performing the pressure release function.
According to the diaphragm pump 100 of the embodiment of the present invention, the buffer portion 21 is provided at the lower portion of the relief valve 20, so that the buffer portion 21 reduces friction and collision force of the relief valve 20 during movement, thereby effectively reducing working noise of the diaphragm pump 100.
In some embodiments of the present invention, as shown in fig. 1 in combination with fig. 2 and 6, the diaphragm pump 100 further includes: the elastic component 30, the elastic component 30 is abutted against the upper surface of the pressure relief valve 20, it can be appreciated that the elastic component 30 has an initial elastic potential energy, and normally, the elastic component 30 abutted against the pressure relief valve 20 limits the upward movement of the pressure relief valve 20, once the pressure value of the air outlet chamber 12 exceeds a preset value, the pressure relief valve 20 can overcome the elastic force to move upward to open the pressure relief opening.
In some embodiments, the elastic assembly 30 includes: bushing 31, compression spring 33 and stop 34. The bushing 31 defines a movable cavity 32, one end of the compression spring 33 is stopped against the upper surface of the pressure release valve 20, the limiting piece 34 is clamped in the movable cavity 32, and the other end of the compression spring 33 extends upwards along the extending direction of the movable cavity 32 and is stopped against the lower end surface of the limiting piece 34. In other words, the pressure spring 33 is defined between the pressure release valve 20 and the stopper 34, and in the case where the air pressure of the air outlet chamber 12 is smaller than the preset value, a downward force is applied to the pressure release valve 20 by the pressure spring 33, so that the pressure release valve 20 tightly closes the pressure release opening 122, preventing the air outlet chamber 12 from being deflated; when the air pressure in the air outlet chamber 12 is greater than the preset value, the pressure release valve 20 is opened, the compression spring 33 is compressed, and the air in the air outlet chamber 12 is discharged through the pressure release opening 122.
In an alternative embodiment, the stop 34 is an interference fit with the bushing 31. That is, the diameter of the limiting member 34 is slightly larger than the diameter of the movable cavity 32, that is, the limiting member 34 is relatively statically clamped in the movable cavity 32 to perform a limiting function on the compression spring 33, wherein the limiting member 34 may be a steel ball.
In a further alternative embodiment, referring to fig. 1, 2, 3 and 6, a positioning protrusion 221 is formed on the upper surface of the sealing portion 22 in an upward extending manner, and one end of the compression spring 33 is wound around the positioning protrusion 221, so that the positioning protrusion 221 can prevent the compression spring 33 from shaking, and improve the stability of the compression spring 33.
In one embodiment of the present invention, referring to fig. 2 and 6, the elastic assembly 30 further includes: the fixing seat 35 is sleeved on the outer peripheral surface of the positioning protrusion 221, a positioning flange 351 is formed on the lower end periphery of the fixing seat 35 in an outward extending mode, and the lower surface of the positioning flange 351 is attached to the upper surface of the sealing portion 22. The material hardness of the pressure release valve 20 is smaller than that of the fixed seat 35, for example, the pressure release valve 20 is made of flexible rubber material, and the fixed seat 35 is made of plastic with larger hardness, so that the pressure spring 33 is in contact with the fixed seat 35 with larger hardness, and the pressure spring 33 is not offset in the movable cavity 32, so that the pressure release valve has better stability.
In a preferred embodiment of the present invention, as shown in fig. 4 and 6, the circumferential wall of the movable chamber 32 is formed with a plurality of guide ribs 321 extending in the axial direction, the plurality of guide ribs 321 defining the degree of freedom of the bush 31 in the circumferential direction, restricting its rotation in the circumferential direction, improving the stability of the elastic assembly 30 as a whole.
In one embodiment of the present invention, as shown in fig. 2 and 6, the fixing portion 23 is formed with an annular sleeve 231 extending upward along the circumferential direction, and the annular sleeve 231 is wound around the outer circumferential wall of the bush 31.
In an alternative embodiment, as shown in fig. 10, 12 and 13, a plurality of notches 2311 are formed on the circumferential wall of the annular sleeve 231, and a plurality of catching protrusions 312 are formed on the circumferential wall of the bush 31, and the plurality of catching protrusions 312 are caught in the notches 2311. Thereby, the degree of freedom of the relief valve 20 in the circumferential direction can be limited, and the degree of tightness of the fit between the relief valve 20 and the relief port 122 can be improved.
In still other embodiments of the present invention, as shown in fig. 1 in combination with fig. 2 and 5, a diaphragm pump 100 includes: upper cap assembly 10, piston assembly 40 and drive assembly 50. The upper cover assembly 10, the piston assembly 40 and the driving assembly 50 are sequentially connected, the upper cover assembly 10 is provided with a first backflow hole 15, the upper cover 16 is provided with an air inlet channel 19, the piston assembly 40 is provided with a second backflow hole 43 communicated with the first backflow hole 15, the driving assembly 50 is provided with a pump film cavity 54, the first backflow hole 15 is communicated with the pressure relief channel 14, and the second backflow hole 43 is communicated with the air inlet channel 19.
Thus, after the relief valve 20 is opened, a portion of the airflow passes through the relief port 122 and then enters the relief passage 14, and flows downward through the first and second return holes 15 and 43, and is returned to the intake chamber 11 through the intake passage 19. Thereby, the diaphragm pump 100 is prevented from overpressure air supply to the inflator. It should be understood that the above embodiments are only illustrative, and not limiting the scope of the present invention, and the air discharged from the pressure relief port 122 may be directly discharged into the outside air.
In some embodiments, the first reflow hole 15 is disposed opposite to the notch 2311, the bottom surface of the notch 2311 is spaced from the lower surface of the latch protrusion 312 by a predetermined distance, and a plurality of air outlet through holes 211 are formed in the circumferential direction of the buffer portion 21. Namely, a first air gap is formed between the bottom surface of the notch 2311 and the lower surface of the clamping protrusion 312, so that after the pressure relief opening 122 is opened, a part of air flow directly flows back to the pump film cavity 54 through the first backflow hole 15 and the second backflow hole 43; another part of the air flow flows upward along the pressure release passage 14, passes through the air outlet through hole 211 and the first air gap, and then flows back to the pump membrane chamber 54 through the first backflow hole 15 and the second backflow hole 43.
In other words, a part of the air flow from the pressure relief port 122 flows back directly, and another part flows upward and then flows back, so that the residence time of the air flow in the pressure relief channel 14 is prolonged, and the air flow is distributed in the pressure relief channel 14 more, thereby realizing rapid reduction of the air pressure of the air outlet chamber 12.
In still other embodiments of the present invention, as shown in fig. 4 and 5, a plurality of support bases 141 are provided at intervals on the bottom surface of the pressure release passage 14, and the fixing portion 23 is overlapped on the support bases 141. Thus, the fixing portion 23 and the buffer portion 21 are spaced from the bottom surface 14 of the pressure release channel by a predetermined distance to form a second air gap, and thus, after the pressure release valve 20 opens the pressure release opening, the air flow can flow in the direction of the first backflow hole 15 through the second air gap, thereby realizing pressure release.
In one embodiment, as shown in fig. 1,2, 6 and 10, the lower end surface of the closing portion 22 is provided with an annular lip 222, and the radial dimension of the annular lip 222 is greater than the radial dimension of the pressure relief opening 122. On the one hand, the presence of the annular lip 222 reduces the dead weight of the closure 22; on the other hand, when the air pressure of the air outlet chamber 12 is continuously changed, the sealing portion 22 will vibrate up and down, the lower surface of the sealing portion 22 will flap the upper surface of the pressure relief opening 122, the annular lip 222 will change the surface contact into the line contact, the contact area will be reduced, and the noise generated by the flap will be reduced.
In one embodiment of the invention, referring to fig. 7, 8, 9, 10, 11 and 12, the buffer 21 is a film made of a flexible material. When the closing portion 22 is lifted up by the air pressure, the film is pulled up; as the closure 22 falls back, the film retracts. Because the membrane has good deformability, the membrane can perform good traction in the rising and falling processes of the sealing part 22, and severe friction and impact between the pressure release valve 20 and the pressure release channel 14 are avoided, so that the working noise of the whole diaphragm pump 100 is reduced.
In some alternative embodiments, as shown with reference to fig. 7 and 8, the buffer 21 is a flat plate. Thereby the pressure release valve 20 is simple in mould forming, convenient to process and low in cost.
In other alternative embodiments, as shown with reference to fig. 9, 10 and 11, the buffer portion 21 is an arcuate plate. The arcuate plate has a large deformation amount, and thus, the buffer portion 21 can be made to have a better buffer capacity, effectively reducing the operation noise of the diaphragm pump 100.
Further alternatively, as shown in fig. 10, the thickness of the buffer portion 21 is smaller than the thicknesses of the closing portion 22 and the fixing portion 23. Thereby, the buffer portion 21 can be made to have a better buffer capacity, and the operation noise of the diaphragm pump 100 can be effectively reduced.
In one embodiment of the present invention, as shown in fig. 1 and fig. 5 and 6, the upper end edge of the bushing 31 is formed with a limit flange 311 extending outwards, and the limit flange 311 is attached to the upper end edge of the pressure release channel 14, so that the bushing 31 can be effectively mounted on the upper cover 16, and the shaking of the bushing 32 is avoided.
In a further alternative embodiment, the bottom of the limit flange 311 has a positioning hole 3111, and the upper cover 16 is provided with a positioning post 161 that mates with the positioning hole 3111. Thus, the fitting strength between the bush 31 and the upper cover 16 can be further improved, and the fool-proof effect can be provided, thereby improving the assembly efficiency.
In some embodiments, as shown in FIG. 1, the upper cover 16 also has a third backflow hole 162, the third backflow hole 162 communicating with the intake chamber 11. When the relief valve 20 is opened, a portion of the airflow passes through the relief port 122 and then enters the second relief passage 143 and flows directly to the intake chamber 11 through the third backflow hole 162. During the operation of the diaphragm pump 100, the gas flowing back into the intake chamber 11 again enters the intake passage 19, thereby achieving the purpose of pressure relief. Wherein the first pressure relief channel 142 and the second pressure relief channel 143 may be provided relatively independently, that is, the diaphragm pump 100 is provided with at least one of the pressure relief channels 14.
Other configurations and operations of the diaphragm pump 100 are understood and readily available to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "bottom", "inner", "outer", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (12)
1. A diaphragm pump, comprising:
an upper cover assembly defining an inlet chamber and an outlet chamber, the outlet chamber having an outlet and a pressure relief vent, the upper cover assembly comprising:
The upper cover is provided with an air outlet channel and a pressure relief channel, and the air outlet channel is communicated with the air outlet chamber;
The pressure relief valve is movably arranged in the pressure relief channel and used for opening or closing the pressure relief opening, the pressure relief valve is provided with a buffer part, a closing part and a fixing part, wherein the closing part and the fixing part are connected to two ends of the buffer part, the buffer part is used for reducing collision sound of the pressure relief valve in the moving process, and the buffer part is made of flexible materials;
The elastic component is stopped against the upper surface of the pressure relief valve;
The upper cover assembly, the piston assembly and the driving assembly are sequentially connected, the upper cover assembly is provided with a first backflow hole, the piston assembly is provided with an air inlet channel, the piston assembly is provided with a second backflow hole communicated with the first backflow hole, the driving assembly is provided with a pump membrane cavity, the first backflow hole is communicated with the pressure release channel, and the second backflow hole is communicated with the air inlet channel;
The elastic assembly includes:
A bushing defining a movable cavity;
One end of the pressure spring is stopped against the upper surface of the pressure relief valve;
The limiting piece is clamped in the movable cavity, and the other end of the pressure spring extends upwards along the extending direction of the movable cavity and is stopped against the lower end face of the limiting piece;
the periphery of the fixing part extends upwards to form an annular sleeve, and the annular sleeve is wound on the outer peripheral wall of the bushing;
A plurality of notches are formed in the peripheral wall of the annular sleeve, a plurality of clamping protrusions are formed in the peripheral wall of the bushing, and the clamping protrusions are clamped in the notches;
The first reflow holes are arranged vertically opposite to the notch, the bottom surface of the notch is spaced a preset distance from the lower surface of the clamping protrusion, and a plurality of air outlet through holes are formed in the circumferential direction of the buffer part.
2. The diaphragm pump of claim 1, wherein the upper surface of the closing portion is formed with a positioning protrusion extending upward, and one end of the compression spring is wound around the positioning protrusion.
3. The diaphragm pump of claim 2 wherein the spring assembly further comprises: the fixing seat is sleeved on the outer peripheral surface of the positioning protrusion, a positioning flange is formed by extending the lower end periphery of the fixing seat outwards, and the lower surface of the positioning flange is attached to the upper surface of the sealing part.
4. A diaphragm pump according to claim 1, wherein the peripheral wall of the movable chamber is formed with a plurality of guide ribs extending in the axial direction.
5. The diaphragm pump of claim 1, wherein a plurality of support bases are provided at intervals on the bottom surface of the pressure release passage, and the fixing portion is overlapped on the support bases.
6. The diaphragm pump of claim 1 wherein the lower end face of the closure is provided with an annular lip having a radial dimension greater than the radial dimension of the relief port.
7. The diaphragm pump of claim 1 wherein the buffer is a membrane made of a flexible material.
8. The diaphragm pump of claim 7 wherein the buffer is a flat plate or an arcuate plate.
9. The diaphragm pump of claim 8 wherein the thickness of the buffer portion is less than the thickness of the closure portion and the securing portion.
10. The diaphragm pump of claim 1 wherein the upper edge of the liner is formed with a stop flange extending outwardly therefrom, the stop flange conforming to the upper edge of the pressure relief channel.
11. The diaphragm pump of claim 10 wherein the bottom of the stop flange has a locating hole and the upper cover has a locating post that mates with the locating hole.
12. The diaphragm pump of claim 1 wherein the upper cover is provided with a third backflow orifice that communicates with the intake chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229319.1A CN109838370B (en) | 2017-11-29 | 2017-11-29 | Diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229319.1A CN109838370B (en) | 2017-11-29 | 2017-11-29 | Diaphragm pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109838370A CN109838370A (en) | 2019-06-04 |
| CN109838370B true CN109838370B (en) | 2024-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711229319.1A Active CN109838370B (en) | 2017-11-29 | 2017-11-29 | Diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109838370B (en) |
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| CN207673524U (en) * | 2017-11-29 | 2018-07-31 | 厦门科际精密器材有限公司 | Diaphragm pump |
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| GB751929A (en) * | 1953-09-29 | 1956-07-04 | Electrol Inc | Improvements in pressure relief valves |
| JP2005344752A (en) * | 2004-05-31 | 2005-12-15 | Favess Co Ltd | Relief valve |
| US8256467B1 (en) * | 2011-06-07 | 2012-09-04 | Ips Corporation | Plug with pressure release valve |
| DE112012002756B4 (en) * | 2011-09-02 | 2021-05-12 | Alfmeier Präzision SE | Pump, especially pneumatic pump |
| KR102063364B1 (en) * | 2013-09-03 | 2020-01-07 | 현대모비스 주식회사 | Relief valve appratus of motor pump unit for ehps |
| DE102014200074A1 (en) * | 2014-01-08 | 2015-07-09 | Robert Bosch Gmbh | Valve |
| WO2016037492A1 (en) * | 2014-09-12 | 2016-03-17 | 厦门科际精密器材有限公司 | Air pump |
| CN205938010U (en) * | 2016-05-12 | 2017-02-08 | 明达实业(厦门)有限公司 | Tuyere relief valve |
| CN106051241B (en) * | 2016-07-18 | 2019-01-04 | 三河平恩康汽车技术有限公司 | A kind of electronics relief valve |
| CN106837748B (en) * | 2017-03-31 | 2018-10-23 | 浙江鸿友压缩机制造有限公司 | It is accompanied with the knob pressure regulator valve of pressure gauge and is fitted with the compressor of the pressure regulator valve |
-
2017
- 2017-11-29 CN CN201711229319.1A patent/CN109838370B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203549029U (en) * | 2013-11-28 | 2014-04-16 | 浙江万得凯铜业有限公司 | Spring type safety valve |
| CN204186563U (en) * | 2014-09-28 | 2015-03-04 | 厦门科际精密器材有限公司 | Air pump |
| CN207673524U (en) * | 2017-11-29 | 2018-07-31 | 厦门科际精密器材有限公司 | Diaphragm pump |
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| Publication number | Publication date |
|---|---|
| CN109838370A (en) | 2019-06-04 |
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