CN106678403A - Proportional pressure reducing valve - Google Patents
Proportional pressure reducing valve Download PDFInfo
- Publication number
- CN106678403A CN106678403A CN201611141781.1A CN201611141781A CN106678403A CN 106678403 A CN106678403 A CN 106678403A CN 201611141781 A CN201611141781 A CN 201611141781A CN 106678403 A CN106678403 A CN 106678403A
- Authority
- CN
- China
- Prior art keywords
- pressure cavity
- low
- pressure
- cavity
- piston
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000012528 membrane Substances 0.000 claims description 20
- 230000000903 blocking effect Effects 0.000 claims description 19
- 230000000740 bleeding effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 239000010963 304 stainless steel Substances 0.000 description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a proportional pressure reducing valve. The proportional pressure reducing valve comprises a low-pressure cavity stop cover, a shell, an air inlet connector, a high-pressure cavity stop cover, a high-pressure cavity piston, a sealing ring, an air outlet connector and a low-pressure cavity piston. The low-pressure cavity stop cover is connected with one end of the shell, and the high-pressure cavity stop cover is connected with the other end of the shell. An inner cavity is formed by the low-pressure cavity stop cover, the shell and the high-pressure cavity stop cover. The low-pressure cavity piston is arranged in a low-pressure cavity, and the outer side wall of the first end of the low-pressure cavity piston can be in pressure joint with the inner side wall of the sealing ring, and the low-pressure cavity piston can move up and down along the axis of the cavity. The high-pressure cavity piston is arranged in a high-pressure cavity, the second end of the high-pressure cavity piston makes contact with the first end of the low-pressure cavity piston, and the high-pressure cavity piston can move up and down along the axis of the cavity. The proportional pressure reducing valve can well solve the problems that the service life of the valve is short, and air leakage exists; and the proportional pressure reducing valve is suitable for long-time pressure reducing and inflating of shock tunnels and is simple in structure, easy to machine and low in manufacturing cost.
Description
Technical Field
The invention relates to the field of fluid valve control, in particular to a proportional pressure reducing valve.
Background
A proportional pressure reducing valve is a device for controlling fluid, which opens or closes a vent by the balanced movement of an internal piston to achieve an outlet pressure equal to 1/2 inlet pressure; the valve has the advantages of compact structure, low maintenance cost and simple structure, and is suitable for the field of pressure control occasions of wind tunnel membrane breaking and proportional pressure reduction requirements.
At present, the proportion control of the membrane breaking pressure of the shock tunnel mainly uses the opening and closing of a stop valve, observes the actual pressure value, frequently controls the on-off of air flow and achieves the required target pressure value. Generally, an 1/2 proportional valve is needed in a shock tunnel, so that the diaphragm is rapidly broken, and the pressure control of the tunnel is realized. For example, the FD-20 shock wave/gun wind tunnel of CAAA adopts manual pressure regulation to break the membrane, the FD-22 gun wind tunnel adopts an electromagnetic valve to manually control the membrane, and the FD-22a gun wind tunnel adopts 1/2 proportional pressure reduction valve to control.
The medium is a shock tunnel operated by compressed air or nitrogen, and the pressure regulating process is different from several minutes to one hour according to the inflation pressure. For a high-pressure operation state, the time is long, the attention of personnel is required to be concentrated, the pressure is accurately controlled, and otherwise, the quality of the rupture of membranes is influenced; long-time operation, operating personnel intensity of labour is big, and the stop valve frequently opens and stops the action simultaneously, and the life-span is low, and basic half a year just will be changed. In order to reduce the labor intensity of personnel and improve the control precision, a proportional pressure reducing valve is designed and applied to an FD-22a gun wind tunnel.
Although the FD-22 wind tunnel uses 1/2 proportional pressure reducing valves, the pressure control precision is improved, and the labor intensity of operators is reduced; however, in the using process, the rubber sealing material is adopted to make a small sealing port, the valve port is stressed intensively, the valve port is easy to have indentation under the condition of frequent opening and closing, and the air leakage is very obvious under higher pressure, particularly over 35MPa, and the valve cannot be used. At present, the pressure control is still realized by controlling a stop valve by an operator only by using an 1/2 proportional pressure reducing valve under the pressure of 30MPa and controlling the stop valve by the operator when the pressure exceeds 30MPa,
according to the use experience, the tetrafluoroethylene sealing material is adopted, after the tetrafluoroethylene sealing material is used for a period of time, the original shape of the tetrafluoroethylene sealing material is difficult to recover after the sealing opening is provided with an indentation, and air leakage occurs. The valve port is abraded after being used for a period of time by adopting a soft rubber material, and the phenomenon of air leakage occurs. At present, the problem can only be solved by replacing the sealing element more frequently.
Disclosure of Invention
The technical problem solved by the invention is as follows: compared with the prior art, the proportional pressure reducing valve is provided, the problems of short service life and air leakage of the valve are well solved, the proportional pressure reducing valve is suitable for long-time pressure reduction and inflation of a shock tunnel, and the proportional pressure reducing valve is simple in structure, easy to process and low in manufacturing cost.
The purpose of the invention is realized by the following technical scheme: a proportional pressure reducing valve comprising: the low-pressure cavity sealing device comprises a low-pressure cavity sealing cover, a shell, an air inlet joint, a high-pressure cavity sealing cover, a high-pressure cavity piston, a sealing ring, an air outlet joint and a low-pressure cavity piston; the low-pressure cavity blocking cover is connected with one end of the shell, and the high-pressure cavity blocking cover is connected with the other end of the shell; the low-pressure cavity blocking cover, the shell and the high-pressure cavity blocking cover form an internal cavity, wherein the cavity comprises a low-pressure cavity and a high-pressure cavity, and the low-pressure cavity is communicated with the high-pressure cavity; the sealing ring is arranged at the communication position of the low-pressure cavity and the high-pressure cavity, wherein the outer surface of the sealing ring is in press connection with the inner wall of the shell; the low-pressure cavity piston is arranged in the low-pressure cavity, the outer side wall of the first end of the low-pressure cavity piston can be in compression joint with the inner side wall of the sealing ring, and the low-pressure cavity piston can move up and down along the axis of the cavity; the high-pressure cavity piston is arranged in the high-pressure cavity, the second end of the high-pressure cavity piston is in contact with the first end of the low-pressure cavity piston, and the high-pressure cavity piston can move up and down along the axis of the cavity; one side of the shell is provided with an air inlet joint, wherein the air inlet joint is connected with the upper part of the high-pressure cavity through a first channel, and the air inlet joint is connected with the lower end of the high-pressure cavity through a second channel; and an air outlet joint is arranged on the other side of the shell, wherein the air outlet joint is connected with the lower part of the low-pressure cavity through a third channel, and the air inlet joint is connected with the upper end of the low-pressure cavity through a fourth channel.
In the above-mentioned proportional pressure reducing valve, still include: and the high-pressure cavity sealing membrane is arranged in the high-pressure cavity and is positioned at the lower part of the high-pressure cavity piston.
In the above-mentioned proportional pressure reducing valve, still include: and the low-pressure cavity sealing membrane is arranged in the low-pressure cavity and is positioned at the upper part of the low-pressure cavity piston.
In the above-mentioned proportional pressure reducing valve, still include: a first deflation joint and a second deflation joint; the first air bleeding joint is arranged on one side of the shell and is connected with the first end of the low-pressure cavity through a fifth channel formed in the shell; the second air release joint is arranged on the other side of the shell and is connected with the second end of the high-pressure cavity through a sixth channel formed in the shell.
In the above-mentioned proportional pressure reducing valve, still include: locking the stud; wherein the diameter of the bottom end of the low pressure cavity is smaller than the diameter of the upper end of the high pressure cavity; the locking stud is arranged in the high-pressure cavity and is in threaded connection with the inner wall of the shell; the diameter of the sealing ring is equal to that of the upper end of the high-pressure cavity, one end of the sealing ring is in pressure joint with the bottom end of the low-pressure cavity, and the other end of the sealing ring is in pressure joint with one end of the locking stud; the locking stud is provided with a through cavity, and the second end of the high-pressure cavity piston penetrates through the through cavity to be in contact with the first end of the low-pressure cavity piston.
In the proportional pressure reducing valve, the low-pressure cavity blocking cover is connected with one end of the shell through a screw, and the high-pressure cavity blocking cover is connected with the other end of the shell through a screw.
In the proportional pressure reducing valve, the cross section of the opening of the sealing ring along the axis is trapezoidal, and correspondingly, the side wall of the first end of the low-pressure cavity piston is matched with the opening of the sealing ring.
In the proportional pressure reducing valve, the cross section of the low-pressure cavity along the axis is a T-shaped cavity, and the shape of the low-pressure cavity piston is matched with that of the low-pressure cavity; the cross section of the high-pressure cavity along the axis is in an inverted T-shaped cavity, and the shape of the high-pressure cavity piston is matched with that of the high-pressure cavity.
In the proportional pressure reducing valve, the sealing ring is a polytetrafluoroethylene sealing ring.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the integral structure of the proportional pressure reducing valve to solve the problems of short service life and air leakage of the existing valve, is suitable for long-time pressure reduction and inflation of the shock tunnel, and has simple structure, easy processing and low manufacturing cost;
(2) the sealing effect is good due to the adoption of the low-pressure cavity sealing film;
(3) the sealing effect is good due to the adoption of the high-pressure cavity sealing film;
(4) the sealing ring is made of polytetrafluoroethylene, so that the service life is long;
(5) the invention has simple structure, easy processing and manufacture and low cost.
Drawings
FIG. 1 is a schematic diagram of the construction of the proportional pressure reducing valve of the present invention;
FIG. 2 is a schematic view of the construction of the low pressure chamber closure of the present invention;
FIG. 3 is a schematic view of the high pressure chamber closure of the present invention;
FIG. 4(a) is a top view of the housing of the present invention;
fig. 4(b) is a bottom view of the housing of the present invention;
FIG. 5 is a schematic view of the seal ring of the present invention;
FIG. 6(a) is a left side view of the locking stud of the present invention;
FIG. 6(b) is a cross-sectional view of the locking stud of the present invention taken along the axis;
FIG. 7 is a schematic structural view of the high pressure chamber piston of the present invention;
fig. 8 is a schematic view of the construction of the low pressure chamber piston of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of the construction of a proportional pressure reducing valve of the present invention. As shown in fig. 1, the proportional pressure reducing valve includes: the device comprises a low-pressure cavity blocking cover 1, a shell 2, an air inlet joint 4, a high-pressure cavity blocking cover 5, a high-pressure cavity piston 7, a sealing ring 9, an air outlet joint 11 and a low-pressure cavity piston 12; wherein,
the low pressure chamber blanking cap 1 is connected with one end of the casing 2, and the high pressure chamber blanking cap 5 is connected with the other end of the casing 2. During specific implementation, the material of the low-pressure chamber blocking cover 1 is 304 stainless steel, the material of the high-pressure chamber blocking cover 5 is 304 stainless steel, the material of the housing 2 is 304 stainless steel, and further, the axis of the low-pressure chamber blocking cover 1, the axis of the housing 2 and the axis of the high-pressure chamber blocking cover 5 are the same axis.
The low pressure chamber closure 1, the housing 2 and the high pressure chamber closure 5 form an inner cavity, wherein the cavity comprises a low pressure chamber 151 and a high pressure chamber 152, and the low pressure chamber 151 and the high pressure chamber 152 are communicated. Specifically, the low pressure chamber blanking cap 1 seals the upper end of the housing 2, the high pressure chamber blanking cap 5 seals the lower end of the housing 2, and an internal cavity is formed by the low pressure chamber blanking cap 1, the housing 2 and the high pressure chamber blanking cap 5. The cavity is divided into a low pressure chamber 151 and a high pressure chamber 152.
The seal ring 9 is provided at a communication position of the low pressure chamber 151 and the high pressure chamber 152, wherein an outer surface of the seal ring 9 is press-contacted with an inner wall of the housing 2. In a specific embodiment, the sealing ring 9 is a teflon sealing ring.
The low pressure chamber piston 12 is arranged in the low pressure chamber 151, the outer side wall of the first end 121 of the low pressure chamber piston 12 can be in compression joint with the inner side wall of the sealing ring 9, and the low pressure chamber piston 12 can move up and down along the axis of the cavity. Specifically, the low pressure chamber 151 has a T-shaped cross section along its axis, and the shape of the low pressure chamber piston 12 matches the shape of the low pressure chamber 151. The axis of the cavity coincides with the axis of the housing 2.
The high pressure chamber piston 7 is arranged in the high pressure chamber 152, the second end 71 of the high pressure chamber piston 7 is in contact with the first end 121 of the low pressure chamber piston 12, and the high pressure chamber piston 7 can move up and down along the axis of the cavity. Specifically, the cross-sectional shape of the high-pressure chamber 152 along the axis thereof is an inverted T-shaped cavity, and the shape of the high-pressure chamber piston 7 matches the shape of the high-pressure chamber 152. The axis of the cavity coincides with the axis of the housing 2.
One side of the housing 2 is provided with an intake joint 4, wherein the intake joint 4 is connected with the upper portion of the high pressure chamber 152 through a first passage 41, and the intake joint 4 is connected with the lower end of the high pressure chamber 152 through a second passage 42. Specifically, the air inlet joint 4 is disposed on the left side of the casing 2, the first passage 41 and the second passage 42 have the same pipe section, the first passage 41 is opened inside the casing 2, the first passage 41 is connected to the upper portion of the high pressure chamber 152, and further, the first passage 41 is connected to the upper portion a of the high pressure chamber 152 in fig. 1. The second channel 42 is opened in the housing 2 and the high pressure chamber blocking cover 5, and the second channel 42 is connected to the lowest end of the high pressure chamber 152.
The other side of the housing 2 is provided with an outlet joint 11, wherein the outlet joint 11 is connected with the lower part of the low pressure chamber 151 through a third passage 111, and the inlet joint 4 is connected with the upper end of the low pressure chamber 151 through a fourth passage 112. Specifically, the right side of the housing 2 is provided with the air outlet joint 11, the third channel 111 and the fourth channel 112 have the same section of pipeline, the third channel 111 is arranged inside the housing 2, the third channel 111 is connected with the lower part of the low-pressure cavity 151, and further, the third channel 111 is connected with the upper part B of the low-pressure cavity 151 in fig. 1. The housing 2 and the low pressure chamber cover 1 have a fourth channel 112 formed therein, and the fourth channel 112 is connected to the uppermost end of the low pressure chamber 151.
The working principle is as follows: the high-pressure gas source is connected by the air inlet connector 4, enters the high-pressure cavity 152, the high-pressure cavity piston 7 moves a distance, the high-pressure cavity piston 7 is enabled to prop against the low-pressure cavity piston 12 to move upwards, the low-pressure cavity piston 12 is enabled to be separated from the sealing ring 9, a gap is generated between the low-pressure cavity piston 12 and the sealing ring 9, the high-pressure gas reaches the air outlet connector 11 and the low-pressure cavity of the outlet through the gap, the pressure of the low-pressure cavity rises simultaneously along with the rise of the pressure of the outlet, the force acting on the low-pressure cavity piston 12 is gradually increased, when the gas pressure reaches 1/2 of the inlet pressure, the two forces are balanced, the gap between the sealing ring and the low-pressure cavity piston 12 meets the flow. When the outlet pressure exceeds 1/2 of the inlet pressure, the low pressure chamber piston 12 gradually moves in the opposite direction, so that the gap between the sealing ring and the low pressure chamber piston 12 gradually becomes smaller, the outlet pressure is maintained to be about 1/2 of the inlet pressure, and the pressure control precision is basically 1%.
The integral structure of the proportional pressure reducing valve is adopted in the embodiment, so that the problems of short service life and air leakage of the conventional valve are solved, the proportional pressure reducing valve is suitable for long-time pressure reduction and inflation of a shock tunnel, and the proportional pressure reducing valve is simple in structure, easy to process and low in manufacturing cost; and the structure of this embodiment is simple, easy manufacturing, and is with low costs.
In the above embodiment, as shown in fig. 1, the proportional pressure reducing valve further includes: and a high-pressure chamber sealing membrane 6, wherein the high-pressure chamber sealing membrane 6 is arranged in the high-pressure chamber 152 and is positioned at the lower part of the high-pressure chamber piston 7. Specifically, the high-pressure cavity sealing film 6 is made of high-grade fluororubber and is cast and molded by a mold. The high-pressure chamber sealing film 6 is arranged at the connecting position of the shell 2 and the high-pressure chamber blanking cover 5, the high-pressure chamber sealing film 6 is positioned in the high-pressure chamber 152 and positioned at the lower part of the high-pressure chamber piston 7, and the upper surface of the high-pressure chamber sealing film 6 is tightly attached to the lower end of the high-pressure chamber piston 7. The process of inflating the high-pressure cavity 152 through the second channel 42 by the air inlet joint 4 enables the high-pressure cavity sealing membrane 6 to deform, so that the high-pressure cavity sealing membrane 6 enables the high-pressure cavity piston 7 to move upwards, and further 3 mm-5 mm movement of the high-pressure cavity piston 7 can be achieved by means of deformation of the high-pressure cavity sealing membrane 6. The high-pressure cavity sealing film 6 has the effect that high-pressure air is sealed in the cavity where the high-pressure cavity piston 7 is located, gas leakage cannot be generated, and the pressure applied to the piston is kept accurate.
In the above embodiment, as shown in fig. 1, the proportional pressure reducing valve further includes: and a low pressure chamber sealing film 13, wherein the low pressure chamber sealing film 13 is arranged in the low pressure chamber 151 and is positioned at the upper part of the low pressure chamber piston 12. Specifically, the low-pressure cavity sealing film 13 is made of high-grade fluororubber and is cast and molded by a mold. The low-pressure cavity sealing membrane 13 is arranged at the connecting position of the shell 2 and the low-pressure cavity blanking cover 1, the low-pressure cavity sealing membrane 13 is positioned in the low-pressure cavity 151 and positioned at the upper part of the low-pressure cavity piston 12, and the lower surface of the low-pressure cavity sealing membrane 13 is tightly attached to the upper end of the low-pressure cavity piston 12. The 3mm to 5mm movement of the low pressure chamber piston 12 can be achieved by means of the deformation of the low pressure chamber sealing membrane 13 itself. The effect achieved by the low-pressure cavity sealing membrane 13 is that high-pressure air is sealed in the cavity where the low-pressure cavity piston 12 is located, gas cannot leak, and the pressure applied to the piston is kept accurate.
In the above embodiment, as shown in fig. 1, the proportional pressure reducing valve further includes: a first deflation joint 3 and a second deflation joint 10; wherein,
the first air bleeding joint 3 is disposed at one side of the casing 2, and the first air bleeding joint 3 is connected to the first end 1511 of the low pressure chamber 151 through a fifth passage 31 formed in the casing 2. Specifically, the first deflation joint 3 is disposed at the left side of the housing 2, and the first deflation joint 3 is used for keeping the internal pressure of the first end 1511 connected to the atmosphere, and the pressure is one atmosphere.
The second bleeding joint 10 is disposed at the other side of the housing 2, and the second bleeding joint 10 is connected to the second end 1521 of the high pressure chamber 152 through a sixth channel 101 formed in the housing 2. Specifically, the second deflation joint 10 is disposed at the right side of the housing 2, and the second deflation joint 10 is used for keeping the internal pressure of the second end 1521 connected to the atmosphere and keeping the pressure at one atmosphere.
In the above embodiment, as shown in fig. 1, the proportional pressure reducing valve further includes: a locking stud 8; wherein,
the diameter of the lower end of low pressure chamber 151 is smaller than the diameter of the upper end of high pressure chamber 152. Specifically, the axis of the low pressure chamber 151 and the axis of the high pressure chamber 152 are the same axis, and the diameter of the bottom end of the low pressure chamber 151 is smaller than the diameter of the upper end of the high pressure chamber 152, so that the connecting position of the low pressure chamber 151 and the high pressure chamber 152 is convex.
The locking stud 8 is arranged in the high-pressure chamber 152 and is in threaded connection with the inner wall of the housing 2. Specifically, the inner wall of the housing 2, which is provided with the high-pressure cavity 152, is provided with internal threads, and the locking stud 8 is in threaded connection with the inner wall of the housing 2.
The diameter of the sealing ring 9 is equal to the diameter of the upper end of the high-pressure cavity 152, one end of the sealing ring 9 is in pressure joint with the bottom end of the low-pressure cavity 151, and the other end of the sealing ring 9 is in pressure joint with one end of the locking stud 8. Specifically, because the diameter of sealing ring 9 equals with the upper end diameter of high-pressure chamber 152 to make the diameter of sealing ring 9 be greater than the bottom diameter of low-pressure chamber 151, sealing ring 9 can set up in the intercommunication position of low-pressure chamber 151 and high-pressure chamber 152, make the upper end of sealing ring 9 tightly extrude with the lower extreme of low-pressure chamber 151, the lower extreme of sealing ring 9 tightly extrudees with the upper end of locking double-screw bolt 8.
As shown in fig. 6(a) and 6(b), the locking stud 8 is provided with a through cavity, and the second end 71 of the high-pressure chamber piston 7 passes through the through cavity to contact with the first end 121 of the low-pressure chamber piston 12. In particular, the axis of the through cavity coincides with the axis of the high pressure cavity piston 7. One end part of the locking stud 8 is provided with an inner hexagonal hole which is convenient for locking during assembly, and the inner part of the locking stud is provided with a smooth round hole which is used as a piston cavity.
In the above embodiment, the low pressure chamber cover 1 is connected to one end of the housing 2 by the screw 14. Specifically, as shown in fig. 2, the low pressure chamber closing cap 1 has a plurality of through holes uniformly opened along the circumferential direction thereof, the upper end of the housing 2 has a plurality of blind holes (as shown in fig. 4 (a)) corresponding to the through holes of the low pressure chamber closing cap 1, and the screw 14 passes through the through hole of the low pressure chamber closing cap 1 and the blind hole of the upper end of the housing 2 to connect the low pressure chamber closing cap 1 with the upper end of the housing 2.
The high-pressure chamber closure 5 is connected to the other end of the housing 2 by means of screws 14. Specifically, as shown in fig. 3, the high pressure chamber closing cap 5 has a plurality of through holes uniformly opened along the circumferential direction thereof, the lower end of the housing 2 has a plurality of blind holes corresponding to the through holes of the high pressure chamber closing cap 5 (as shown in fig. 4 (b)), and the screw 14 passes through the through hole of the high pressure chamber closing cap 5 and the blind hole at the lower end of the housing 2 to connect the high pressure chamber closing cap 5 with the lower end of the housing 2.
In the above embodiment, as shown in fig. 5, the cross-sectional shape of the opening of the seal ring 9 along the axis is trapezoidal, and correspondingly, the side wall of the first end head 121 of the low pressure chamber piston 12 matches with the opening of the seal ring 9 (as shown in fig. 8). When the low pressure chamber piston 12 moves downwards, the first end 121 of the low pressure chamber piston 12 presses the sealing ring 9.
In the above embodiment, as shown in fig. 7, the piston rod 72 of the high pressure chamber piston 7 is provided with the first O-ring 73, and the high pressure chamber piston 7 is sealingly mounted in the high pressure chamber 152 of the housing 2 via the first O-ring 73.
In the above embodiment, as shown in fig. 8, the piston rod 122 of the low pressure chamber piston 12 is provided with the second O-ring 123, and the low pressure chamber piston 12 is sealingly mounted in the piston cavity of the locking stud 8 through the second O-ring 123.
The invention adopts the integral structure of the proportional pressure reducing valve to solve the problems of short service life and air leakage of the existing valve, is suitable for long-time pressure reduction and inflation of the shock tunnel, and has simple structure, easy processing and low manufacturing cost; in addition, the sealing effect is good due to the adoption of the low-pressure cavity sealing film; in addition, the sealing effect is good due to the adoption of the high-pressure cavity sealing film; in addition, the sealing ring is made of polytetrafluoroethylene, so that the service life is long; the invention has simple structure, easy processing and manufacture and low cost.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (9)
1. A proportional pressure reducing valve, comprising: the device comprises a low-pressure cavity blocking cover (1), a shell (2), an air inlet joint (4), a high-pressure cavity blocking cover (5), a high-pressure cavity piston (7), a sealing ring (9), an air outlet joint (11) and a low-pressure cavity piston (12); wherein,
the low-pressure cavity blocking cover (1) is connected with one end of the shell (2), and the high-pressure cavity blocking cover (5) is connected with the other end of the shell (2);
the low-pressure cavity blocking cover (1), the shell (2) and the high-pressure cavity blocking cover (5) form an internal cavity, wherein the cavity comprises a low-pressure cavity (151) and a high-pressure cavity (152), and the low-pressure cavity (151) is communicated with the high-pressure cavity (152);
the sealing ring (9) is arranged at the communication position of the low-pressure cavity (151) and the high-pressure cavity (152), wherein the outer surface of the sealing ring (9) is in press connection with the inner wall of the shell (2);
the low-pressure cavity piston (12) is arranged in the low-pressure cavity (151), the outer side wall of a first end head (121) of the low-pressure cavity piston (12) can be in compression joint with the inner side wall of the sealing ring (9), and the low-pressure cavity piston (12) can move up and down along the axis of the cavity;
the high-pressure cavity piston (7) is arranged in the high-pressure cavity (152), the second end (71) of the high-pressure cavity piston (7) is in contact with the first end (121) of the low-pressure cavity piston (12), and the high-pressure cavity piston (7) can move up and down along the axis of the cavity;
an air inlet joint (4) is arranged on one side of the shell (2), wherein the air inlet joint (4) is connected with the upper part of the high-pressure cavity (152) through a first channel (41), and the air inlet joint (4) is connected with the lower end of the high-pressure cavity (152) through a second channel (42);
an air outlet joint (11) is arranged on the other side of the shell (2), wherein the air outlet joint (11) is connected with the lower part of the low-pressure cavity (151) through a third channel (111), and the air inlet joint (4) is connected with the upper end of the low-pressure cavity (151) through a fourth channel (112).
2. The proportional pressure reducing valve of claim 1, further comprising: and the high-pressure cavity sealing membrane (6) is arranged in the high-pressure cavity (152) and is positioned at the lower part of the high-pressure cavity piston (7).
3. The proportional pressure reducing valve of claim 1, further comprising: and a low-pressure chamber sealing membrane (13), wherein the low-pressure chamber sealing membrane (13) is arranged in the low-pressure chamber (151) and is positioned at the upper part of the low-pressure chamber piston (12).
4. The proportional pressure reducing valve of claim 1, further comprising: a first deflation joint (3) and a second deflation joint (10); wherein,
the first air release joint (3) is arranged on one side of the shell (2), and the first air release joint (3) is connected with the first end (1511) of the low-pressure cavity (151) through a fifth channel (31) formed in the shell (2);
the second air bleeding connector (10) is arranged on the other side of the shell (2), and the second air bleeding connector (10) is connected with the second end (1521) of the high-pressure cavity (152) through a sixth channel (101) formed in the shell (2).
5. The proportional pressure reducing valve of claim 1, further comprising: a locking stud (8); wherein,
the diameter of the bottom end of the low-pressure cavity (151) is smaller than the diameter of the upper end of the high-pressure cavity (152);
the locking stud (8) is arranged in the high-pressure cavity (152) and is in threaded connection with the inner wall of the shell (2);
the diameter of the sealing ring (9) is equal to that of the upper end of the high-pressure cavity (152), one end of the sealing ring (9) is in compression joint with the bottom end of the low-pressure cavity (151), and the other end of the sealing ring (9) is in compression joint with one end of the locking stud (8);
the locking stud (8) is provided with a through cavity, and the second end (71) of the high-pressure cavity piston (7) penetrates through the through cavity to be in contact with the first end (121) of the low-pressure cavity piston (12).
6. Proportional pressure reducing valve according to claim 1, characterized in that the low-pressure chamber closure (1) is connected to one end of the housing (2) by means of a screw (14) and the high-pressure chamber closure (5) is connected to the other end of the housing (2) by means of a screw (14).
7. Proportional pressure reducing valve according to claim 1, characterized in that the opening of the sealing ring (9) has a trapezoidal cross-sectional shape along the axis, corresponding to the side wall of the first head (121) of the low-pressure chamber piston (12) matching the opening of the sealing ring (9).
8. The proportional pressure relief valve of claim 1,
the cross section of the low-pressure cavity (151) along the axis is a T-shaped cavity, and the shape of the low-pressure cavity piston (12) is matched with that of the low-pressure cavity (151);
the cross section of the high-pressure cavity (152) along the axis is in an inverted T-shaped cavity, and the shape of the high-pressure cavity piston (7) is matched with that of the high-pressure cavity (152).
9. Proportional pressure reducing valve according to claim 1, characterized in that the sealing ring (9) is a teflon sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141781.1A CN106678403B (en) | 2016-12-12 | 2016-12-12 | A kind of proportional pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141781.1A CN106678403B (en) | 2016-12-12 | 2016-12-12 | A kind of proportional pressure-reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106678403A true CN106678403A (en) | 2017-05-17 |
| CN106678403B CN106678403B (en) | 2019-05-24 |
Family
ID=58868891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611141781.1A Active CN106678403B (en) | 2016-12-12 | 2016-12-12 | A kind of proportional pressure-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678403B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131347A (en) * | 2017-12-25 | 2018-06-08 | 宁波文泽机电技术开发有限公司 | No leakage three-way pressure reducing valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128559A (en) * | 1994-10-31 | 1996-05-21 | Nippon Soken Inc | Flow rate regulating valve |
| US6237635B1 (en) * | 1999-06-25 | 2001-05-29 | Aera Japan Ltd. | Exhauster pressure control system |
| US20080196773A1 (en) * | 2007-02-16 | 2008-08-21 | Honeywell International, Inc. | Ventline control valve assembly |
| US20090000674A1 (en) * | 2007-06-29 | 2009-01-01 | Jacobsen Stephen C | Pressure control valve having an asymmetric valving structure |
| CN103827563A (en) * | 2011-08-31 | 2014-05-28 | 柏佛尔德流体动力有限公司 | Valve |
| US20150234392A1 (en) * | 2014-02-18 | 2015-08-20 | Mine Support Products (Pty) Ltd | Pressure reduction device |
| US20150276088A1 (en) * | 2014-03-25 | 2015-10-01 | Hamilton Sundstrand Corporation | Pressure regulating valve and method of adjusting damping of the same |
| CN105283637A (en) * | 2013-03-15 | 2016-01-27 | 智能能源有限公司 | Fluidic components suitable for fuel cell systems including pressure regulators and valves |
-
2016
- 2016-12-12 CN CN201611141781.1A patent/CN106678403B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128559A (en) * | 1994-10-31 | 1996-05-21 | Nippon Soken Inc | Flow rate regulating valve |
| US6237635B1 (en) * | 1999-06-25 | 2001-05-29 | Aera Japan Ltd. | Exhauster pressure control system |
| US20080196773A1 (en) * | 2007-02-16 | 2008-08-21 | Honeywell International, Inc. | Ventline control valve assembly |
| US20090000674A1 (en) * | 2007-06-29 | 2009-01-01 | Jacobsen Stephen C | Pressure control valve having an asymmetric valving structure |
| CN103827563A (en) * | 2011-08-31 | 2014-05-28 | 柏佛尔德流体动力有限公司 | Valve |
| CN105283637A (en) * | 2013-03-15 | 2016-01-27 | 智能能源有限公司 | Fluidic components suitable for fuel cell systems including pressure regulators and valves |
| US20150234392A1 (en) * | 2014-02-18 | 2015-08-20 | Mine Support Products (Pty) Ltd | Pressure reduction device |
| US20150276088A1 (en) * | 2014-03-25 | 2015-10-01 | Hamilton Sundstrand Corporation | Pressure regulating valve and method of adjusting damping of the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131347A (en) * | 2017-12-25 | 2018-06-08 | 宁波文泽机电技术开发有限公司 | No leakage three-way pressure reducing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106678403B (en) | 2019-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4526341A (en) | Pneumatic shut-off valve | |
| CN110906018B (en) | High leakproofness gate valve | |
| US11385661B1 (en) | Gas pressure regulating device | |
| KR102268375B1 (en) | valve | |
| WO2018153203A1 (en) | Electric fluorine-lined corrugated pipe single-seat regulating valve | |
| CN106678403B (en) | A kind of proportional pressure-reducing valve | |
| CN106369200B (en) | A kind of gas spring overflow valve | |
| US20090289208A1 (en) | Pressurized Fluid Discharge Device | |
| CN203516760U (en) | Diaphragm valve for gas cylinder | |
| WO2019019523A1 (en) | Safety valve having double-sealing function | |
| CN205423102U (en) | Cryogenic liquid pump's seal structure and sealing gas system | |
| KR101510987B1 (en) | Pressure valve | |
| CN110985733A (en) | Self-operated pressure balance valve | |
| CN112576775A (en) | Adjust simple and convenient reliable back taper plug valve that seals | |
| WO2018152947A1 (en) | Pneumatic fluorine-lined corrugated pipe single-seat regulating valve | |
| CN203421204U (en) | Sealing and adjusting ball valve | |
| KR100962272B1 (en) | The High Temperature and Pressure Valve | |
| CN206290427U (en) | A kind of stiffness-adjustable one-way valve structures | |
| CN211667219U (en) | Self-operated pressure balance valve | |
| CN110375095B (en) | Pneumatic overload stop valve | |
| CN213776389U (en) | Exhaust valve convenient to maintain | |
| CN204900842U (en) | Special mini relief pressure valve of air compressor machine | |
| CN103090044A (en) | Membrane reversing valve | |
| CN219035578U (en) | Electronic expansion valve | |
| CN216975801U (en) | Self-pressure sealing stop valve |
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 |