CN218818430U - Pressure reducing valve with starting buffering function - Google Patents
Pressure reducing valve with starting buffering function Download PDFInfo
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- CN218818430U CN218818430U CN202223005849.7U CN202223005849U CN218818430U CN 218818430 U CN218818430 U CN 218818430U CN 202223005849 U CN202223005849 U CN 202223005849U CN 218818430 U CN218818430 U CN 218818430U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses a relief pressure valve that possesses start-up buffer function, include: the valve adjusting device comprises an upper shell, a main valve, a buffer mechanism, a valve adjusting unit and a lower shell; the upper shell and the lower shell are fixedly connected; the upper shell is provided with an air inlet, an air outlet, a main valve cavity and an auxiliary valve cavity; the main valve is arranged in the main valve cavity, penetrates through the low-pressure cavity, the high-pressure cavity and the unloading cavity, and controls the flow of gas flowing into the low-pressure cavity from the high-pressure cavity; the unloading cavity is communicated with the low-pressure cavity through a hollow structure of the main valve; one end of the valve adjusting unit is hermetically connected with the lower shell and is connected with the main valve, and the other end of the valve adjusting unit is arranged in the lower shell; the buffer mechanism is arranged in the auxiliary valve cavity, and the air inlet is arranged on one side of the auxiliary valve cavity and is communicated with the high-pressure cavity through the buffer mechanism; the air outlet is arranged on one side of the low-pressure cavity. The utility model discloses a reduce the valve and start inlet flow in the twinkling of an eye, reduce low pressure chamber pressure peak value, can effectively avoid valve regulating unit to damage the noise reduction.
Description
Technical Field
The utility model relates to a relief pressure valve technical field especially relates to the relief pressure valve that possesses start-up buffer function.
Background
The high-pressure and high-flow automatic gas pressure reducing valve is one of essential key elements for automation and integration of a novel carrier rocket launching support system, and various performance indexes and reliability of the automatic gas pressure reducing valve have very important influence on system performance.
In the process of carrier rocket flying, the high-pressure gas cylinder provides pressurized gas for the storage tank through the pressure reducing valve, and the pressure in the air pillow of the storage tank is kept stable. The pressure of the inlet of the pressure reducing valve rises at the moment when high-pressure gas enters, so that the pressure of the outlet is impacted, buzzing sound is generated or a sensitive element (mainly a metal diaphragm) vibrates, the diaphragm is broken, the pressurization of the storage tank is influenced, and the flight failure is caused. The problems not only exist in the flight process of the carrier rocket, but also exist in the deflation process of the civil high-pressure gas cylinder.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a relief pressure valve that possesses start buffer function starts the flow that high-pressure gas got into the relief pressure valve air inlet in the twinkling of an eye through reducing the valve start to stabilize gas outlet pressure, avoid damaging valve adjusting unit.
In order to achieve the above object, the present invention provides a pressure reducing valve with start buffering function, comprising:
the buffer mechanism comprises an upper shell, a main valve, a buffer mechanism, a valve adjusting unit and a lower shell;
the upper shell and the lower shell are fixedly connected;
the upper shell is provided with an air inlet, an air outlet, a main valve cavity and an auxiliary valve cavity;
the main valve is arranged in the main valve cavity, so that the main valve cavity sequentially forms a low-pressure cavity, a high-pressure cavity and an unloading cavity from bottom to top, and the main valve penetrates through the low-pressure cavity, the high-pressure cavity and the unloading cavity;
the high-pressure cavity is communicated with the low-pressure cavity, and the main valve controls the flow of gas flowing into the low-pressure cavity from the high-pressure cavity;
the main valve is of a hollow structure, and the unloading cavity is communicated with the low-pressure cavity through the hollow structure of the main valve;
one end of the valve adjusting unit is hermetically arranged between the low-pressure cavity and the lower shell and is connected with the main valve to adjust the opening of the main valve; the other end of the valve adjusting unit is arranged in the lower shell;
the buffer mechanism is arranged in the auxiliary valve cavity, and one side of the auxiliary valve cavity is provided with the air inlet;
the air inlet is connected with high-pressure air and is communicated with the high-pressure cavity through the buffer mechanism;
the air outlet is arranged on one side of the low-pressure cavity.
Further, the buffer mechanism includes: the buffer cavity, the buffer valve core and the buffer spring are arranged in the buffer cavity;
one end of the buffer valve core is communicated with the buffer cavity, and the other end of the buffer valve core is connected with one end of the buffer spring;
the other end of the buffer spring is fixedly connected with the bottom end of the auxiliary valve cavity;
the damper spool includes a main passage, a first orifice, a second orifice, and a damper throttle passage;
the buffer throttling channel is arranged in parallel with the main channel and is communicated with the main channel through the first throttling hole;
the buffer chamber is communicated with the main passage through the second throttle hole;
the side wall of the buffer throttling channel is connected with one end of the buffer spring;
when the air inlet is not communicated with high-pressure gas, the air inlet is communicated with the high-pressure cavity through the buffer throttling channel; when the air inlet is communicated with high-pressure gas, the high-pressure gas enters the buffer cavity through the first throttling hole and the second throttling hole, the buffer valve core is pressed downwards to drive the main channel and the buffer throttling channel to compress the buffer spring, and the main channel is communicated with the air inlet and the high-pressure cavity.
Further, the buffer mechanism further comprises a buffer valve cover and a first sealing ring;
the buffer valve cover is connected with the top end of the auxiliary valve cavity in a sealing manner and is sealed with the buffer valve core to form the buffer cavity;
the first sealing ring is arranged between the buffer valve cover and the auxiliary valve cavity.
Further, the valve adjusting unit comprises a metal diaphragm and a main spring; the metal diaphragm is arranged between the low-pressure cavity and the lower shell, is welded with one end of the main spring and jointly seals the low-pressure cavity;
one end of the main spring is abutted against the main valve, and the other end of the main spring is arranged in the lower shell and used for adjusting the opening of the main valve; the metal diaphragm is connected between one end of the main spring and the lower shell and provides a limiting force for the main spring.
Further, the valve adjusting unit further comprises an adjusting screw;
the adjusting screw penetrates through the bottom end of the lower shell and is connected with one end, mounted in the lower shell, of the main spring, and the adjusting screw is used for adjusting the pre-compression amount of the main spring.
Furthermore, a second sealing ring is arranged at the joint of the upper shell and the metal diaphragm.
Further, the main valve comprises a main valve cover, an unloading cavity sealing seat, a main valve core and a main valve seat;
the main valve core penetrates through the unloading cavity sealing seat and the main valve seat;
the main valve cover is connected with the top end of the main valve cavity in a sealing way and is connected with the upper shell, the unloading cavity sealing seat and the main valve core in a sealing way to form the unloading cavity;
the unloading cavity sealing seat, the main valve core, the upper shell and the main valve seat form the high-pressure cavity;
the upper housing, the main valve seat and the valve adjusting unit constitute the low pressure chamber.
Furthermore, a bulge is arranged on the side wall of the main valve core in the high-pressure cavity, and the bottom end of the bulge is an inclined plane; the main valve seat is provided with a step-shaped structure and forms a valve port opposite to the bottom end of the bulge; the valve port is communicated with the high-pressure cavity and the low-pressure cavity.
Further, the main valve further comprises an auxiliary spring and a third sealing ring;
one end of the auxiliary spring is connected with the main valve cover, and the other end of the auxiliary spring is connected with the main valve core;
the third sealing ring is arranged between the main valve element and the unloading cavity sealing seat.
Further, the main valve core is provided with an air pressure balance hole, and the air pressure balance hole is communicated with the low-pressure cavity and the unloading cavity through the hollow structure.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model provides a relief pressure valve that possesses start-up buffer function is provided with main valve chamber and vice valve chamber, sets up buffer gear in vice valve chamber, sets up the air inlet on one side of vice valve chamber, and high-pressure gas passes through buffer gear and high-pressure chamber intercommunication, and buffer gear passes through valve regulating unit control relief pressure valve and starts the intake velocity in the twinkling of an eye; the main valve is arranged in the main valve cavity and controls the flow of high-pressure gas flowing from the high-pressure cavity to the low-pressure cavity. The buffer mechanism limits the flow of the entering high-pressure gas at the gas inlet at the moment of starting the pressure reducing valve, the initial gas flow is very small, the pressure change of the high-pressure cavity and the low-pressure cavity is slow, the gas pressure sensed by the valve adjusting unit is gradually increased, and the pressure impact is avoided. When the air inlet fluctuates, the pressure reducing valve can automatically stabilize the outlet pressure and reduce the impact on the valve adjusting unit.
Furthermore, the instantaneous air inlet flow of the valve is reduced, the pressure peak value of the low-pressure cavity is reduced, the metal diaphragm can be effectively prevented from being damaged, and the noise is reduced. When the flow of the air outlet is changed, the opening of the valve can be automatically increased or decreased by the pressure reducing valve, so that the flow adjusting function is realized.
Drawings
Fig. 1 is a sectional view of an initial state of a pressure reducing valve according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the pressure reducing valve entering a normal flow state in the embodiment of the present invention;
fig. 3 is a schematic view of the air pressure distribution of the main valve element in the embodiment of the present invention.
Detailed Description
A pressure reducing valve with start-up cushioning according to the present invention will now be described in greater detail with reference to the accompanying schematic drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art may modify the invention herein described while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in a very simplified form and are not to precise scale, which is only used for the purpose of facilitating and clearly explaining the embodiments of the present invention.
In this embodiment, a pressure reducing valve with a start buffer function is provided, as shown in fig. 1, including: upper housing 1, main valve, buffer gear, valve regulating unit and lower housing 2.
Wherein, the upper shell 1 and the lower shell 2 are fixedly connected; the upper shell 1 is provided with an air inlet 3, an air outlet 4, a main valve cavity and an auxiliary valve cavity; the main valve is arranged in the main valve cavity, so that the main valve cavity sequentially forms a low-pressure cavity 5, a high-pressure cavity 6 and an unloading cavity 7 from bottom to top, and the main valve penetrates through the low-pressure cavity 5, the high-pressure cavity 6 and the unloading cavity 7; the high-pressure cavity 6 is communicated with the low-pressure cavity 5, and the main valve controls the flow rate of gas flowing into the low-pressure cavity 5 from the high-pressure cavity 6.
Specifically, the main valve is of a hollow structure, and the unloading cavity 7 is communicated with the low-pressure cavity 5 through the hollow structure of the main valve; one end of the valve adjusting unit is hermetically arranged between the low-pressure cavity 5 and the lower shell 2, is connected with the main valve and adjusts the opening degree of the main valve; the other end of the valve adjusting unit is installed in the lower shell 2; the buffer mechanism is arranged in the auxiliary valve cavity, and one side of the auxiliary valve cavity is provided with the air inlet 3; the gas inlet 3 is connected with upstream high-pressure gas and is communicated with the high-pressure cavity 6 through the buffer mechanism; the air outlet 4 is arranged on one side of the low-pressure cavity 5 and can be communicated with a downstream air using point.
In this embodiment, the buffer mechanism includes: the buffer cavity 8, the buffer valve core 9 and the buffer spring 10; one end of the buffer valve core 9 is communicated with the buffer cavity 8, and the other end of the buffer valve core is connected with one end of the buffer spring 10; the other end of the buffer spring 9 is fixedly connected with the bottom end of the auxiliary valve cavity; the cushion spool 9 includes a main passage 901, a first orifice 902, a second orifice 903, and a cushion throttle passage 904; the buffer throttle passage 904 is arranged in parallel with the main passage 901 and communicates through the first throttle hole 902; the buffer chamber 8 communicates with the main passage 901 through the second orifice 903; the side wall of the buffer throttling channel 904 is connected with one end of the buffer spring 10.
When the gas inlet 3 is not communicated with high-pressure gas, the gas inlet 3 is communicated with the high-pressure cavity 6 through the buffer throttling channel 904; when the gas inlet 3 is connected with high-pressure gas, the high-pressure gas enters the buffer cavity 8 through the first throttle hole 902 and the second throttle hole 903, the buffer valve core 9 is pressed downwards to drive the main channel 901 and the buffer throttle channel 904 to compress the buffer spring 10, so that the main channel 901 is communicated with the gas inlet 3 and the high-pressure cavity 6, and the pressure reducing valve enters a normal flow gas supply state, as shown in fig. 2.
The buffer valve core 9 controls the intake air speed at the moment of starting the valve through the second throttle hole 903, so that starting impact is not generated, and the buffer spring 10 is used for providing reset power for the buffer valve core 9.
Specifically, the buffer mechanism further comprises a buffer valve cover 11 and a first sealing ring 12; the buffer valve cover 11 is connected with the top end of the auxiliary valve cavity in a sealing manner and is sealed with the buffer valve core 9 to form the buffer cavity 8; the first sealing ring 12 is arranged between the buffer valve cover 11 and the auxiliary valve cavity.
In this embodiment, the main valve includes a main valve bonnet 13, a relief chamber seal seat 14, a main valve spool 15, and a main valve seat 16; the main valve core 15 penetrates through the unloading cavity sealing seat 14 and the main valve seat 16; the main valve cover 13 is hermetically connected with the top end of the main valve cavity and hermetically connected with the upper shell 1, the unloading cavity sealing seat 14 and the main valve core 15 to form the unloading cavity 7; the unloading cavity sealing seat 14, the main valve core 15, the upper shell 1 and the main valve seat 16 form the high-pressure cavity 6; the upper housing 1, the main valve seat 16 and the valve regulating unit constitute the low pressure chamber 5.
Wherein, main valve core 15 and main valve seat 16 mutually support, have the effect of gas flow regulation and steady pressure.
Specifically, referring to fig. 3, a protrusion is disposed on the sidewall of the main valve element 15 in the high-pressure chamber 6, and the bottom end of the protrusion is an inclined surface; the main valve seat 16 is provided with a step-shaped structure, and forms a valve port opposite to the bottom end of the bulge; the valve port is communicated with the high-pressure cavity 6 and the low-pressure cavity 5.
The main valve core 15 is provided with an air pressure balance hole 1501, and the air pressure balance hole 1501 is communicated with the low pressure cavity 5 and the unloading cavity 7 through the hollow structure. Therefore, a low-pressure area 501 is formed in the low-pressure cavity 5 and the unloading cavity 7, and a high-pressure area 601 is formed in the high-pressure cavity 6.
Specifically, the force of the low pressure chamber 5 gas on main poppet 15 and the force of the high pressure chamber 6 on main poppet 15 maintain the main poppet 15 gas pressure force balanced.
In this embodiment, the main valve further comprises a secondary spring 17 and a third sealing ring 18; one end of the auxiliary spring 17 is connected with the main valve cover 13, and the other end of the auxiliary spring is connected with the main valve core 15; the third sealing ring 18 is arranged between the main valve element 15 and the relief chamber sealing seat 14.
The secondary spring 17 is also one of the power sources for adjusting the opening of the valve port, and provides the reset and sealing pressure of the main valve core 15.
The high-pressure cavity 6 and the unloading cavity 7 are better divided by the unloading cavity sealing seat 14 and the third sealing ring 18, the air pressure balance hole 1501 is communicated with the low-pressure cavity 5 and the unloading cavity 7 through the hollow structure, the pressure in the unloading cavity 7 is ensured to be the same as that in the low-pressure cavity 5, so that the pressure at two ends of the valve core is the same, and the balance of the air pressure at two ends of the valve core is realized.
In the present embodiment, the valve regulating unit comprises a metal diaphragm 19 and a main spring 20; the metal diaphragm 19 is arranged between the low-pressure cavity 5 and the lower shell 2, is welded with one end of the main spring 20, and jointly seals the low-pressure cavity 5; one end of the main spring 20 is abutted against the main valve and used for adjusting the opening of the main valve; the metal diaphragm 19 is connected between one end of the main spring 20 and the lower case 2, and provides a restraining force to the main spring 20.
Specifically, the valve adjusting unit includes a second sealing ring 21 therein, and the second sealing ring 21 is disposed at a connection position of the upper housing 1 and the metal diaphragm 19.
The metal diaphragm 19 is a pressure sensitive element and is one of the power sources for adjusting the opening of the valve port. When the pressure of the low-pressure cavity 5 is increased, the pressure of the metal diaphragm 19 is increased, the main spring 20 is compressed, the main valve core 15 moves downwards, and the opening degree of a valve port is reduced; when the pressure in the low pressure chamber 5 decreases, the pressure of the metal diaphragm 19 decreases, the main spring 20 extends, the main spool 15 moves upward, and the valve opening increases.
Specifically, the valve adjusting unit further comprises an adjusting screw 22; the adjusting screw 22 passes through the bottom end of the lower housing 2 and is connected to the end of the main spring 26 mounted in the lower housing, for adjusting the precompression of the main spring 20 to control the initial opening of the main spool 15.
The main spring 20 maintains the maximum opening of the main valve element 15 when the high-pressure air source is not connected, and gradually increases the valve element opening when the air source pressure is lower than the maximum pressure, or increases the valve element opening when the downstream air flow rate is increased.
In the pressure reducing valve with the start buffer function provided by the embodiment, when the air inlet 3 is connected with a high-pressure air source, the high-pressure air enters the high-pressure cavity 6 through the buffer throttling channel 904. Due to the throttling function of the buffer throttling channel 904, the gas flow is small, the pressure change of the high-pressure cavity 6 and the low-pressure cavity 5 is slow, the gas pressure sensed by the metal diaphragm 19 is gradually increased, and the pressure impact is avoided. The gas in the buffering throttling channel 904 simultaneously enters the buffering cavity 8 along the first throttling hole 902 and the second throttling hole 903, the pressure in the buffering cavity 8 gradually rises, the buffering valve core 9 compresses the buffering spring 10 under the action of the gas pressure, the buffering valve core 9 moves downwards, the main channel 901 is communicated with the gas inlet 3, the throttling function of the buffering throttling channel 904 is eliminated, and the pressure reducing valve enters a normal flow gas supply state.
The main valve core 15 is provided with an air pressure balance hole 1501 which is communicated with the low-pressure cavity 5 and the unloading surface, and the acting force of air in the low-pressure cavity 5 acting on the main valve core 15 and the acting force of the high-pressure cavity 6 acting on the main valve core 15 maintain the self balance of the air pressure acting force of the main valve core 15. The opening degree of the valve port of the main valve core 15 is completely determined by the force of the main spring 20, the force of the auxiliary spring 17 and the pressure of the metal diaphragm 19, and the pressure stabilizing precision of the output pressure is improved.
Specifically, due to the flow limiting effect of the buffer mechanism, the pressure build-up time of the low-pressure cavity and the high-pressure cavity is prolonged by 0.5 s-1 s, the peak pressure of the low-pressure cavity is reduced by 30% -60% at the starting moment, the diameters of the first throttle hole 902, the second throttle hole 903 and the buffer throttle passage 904 are changed, and the pressure build-up time of the low-pressure cavity and the high-pressure cavity and the peak pressure of the low-pressure cavity can be adjusted.
When the downstream gas flow increases, the opening of the valve port of the original main valve element 15 is not enough to provide enough flow to the downstream, the gas in the low-pressure cavity 5 is slightly reduced, the pressure of the metal diaphragm 19 is reduced, the main valve element 15 is pushed to move upwards under the action of the main spring 20, the opening of the valve port between the main valve element 15 and the main valve seat 16 is increased, the gas flow area is increased, the gas flow is increased, the gas pressure in the low-pressure cavity 5 is recovered to be unchanged, and the gas flow of the valve is ensured to meet the requirement of the downstream gas consumption (flow regulation function).
When the upstream gas pressure increases, the gas flow corresponding to the valve port opening of the original main valve element 15 increases, the pressure of the low-pressure chamber 5 increases slightly, the pressure acting on the metal diaphragm 19 increases, the compression amount of the main spring 20 increases, the main valve element 15 moves down under the thrust action of the auxiliary spring 17, the valve port opening decreases slightly, and the valve port gas flow and the outlet pressure are maintained unchanged (pressure regulation function).
After the high-pressure gas is removed, the buffer valve core 9 is reset under the action of the buffer spring 10, the buffer throttling channel 904 is communicated with the gas inlet 3, the connection between the main channel 901 and the gas inlet 3 is disconnected, and the valve enters an initial state.
To sum up, the pressure reducing valve with the starting buffer function provided by the utility model is provided with a main valve cavity and an auxiliary valve cavity, a buffer mechanism is arranged in the auxiliary valve cavity, an air inlet is arranged at one side of the auxiliary valve cavity, high-pressure air is communicated with the high-pressure cavity through the buffer mechanism, and the buffer mechanism controls the air inlet speed of the pressure reducing valve at the moment of starting through a valve adjusting unit; the main valve is arranged in the main valve cavity and controls the flow of high-pressure gas flowing from the high-pressure cavity to the low-pressure cavity. The instant buffer gear of relief pressure valve start limits the flow of the high-pressure gas entering at the air inlet, and the initial gas flow is very little, and high pressure chamber and low pressure chamber pressure change is slower, and the gas pressure that valve regulating unit felt has avoided pressure shock gradually. When the air inlet fluctuates, the pressure reducing valve can automatically stabilize the outlet pressure and reduce the impact on the valve adjusting unit. Furthermore, the pressure peak value of the low-pressure cavity is reduced by reducing the instantaneous air inlet flow of the valve during starting, so that the metal diaphragm can be effectively prevented from being damaged, and the noise is reduced. When the flow of the air outlet is changed, the opening of the valve can be automatically increased or decreased by the pressure reducing valve, so that the flow adjusting function is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A pressure reducing valve having a start-up buffering function, comprising: the valve adjusting device comprises an upper shell, a main valve, a buffer mechanism, a valve adjusting unit and a lower shell;
the upper shell and the lower shell are fixedly connected;
the upper shell is provided with an air inlet, an air outlet, a main valve cavity and an auxiliary valve cavity;
the main valve is arranged in the main valve cavity, so that the main valve cavity sequentially forms a low-pressure cavity, a high-pressure cavity and an unloading cavity from bottom to top, and the main valve penetrates through the low-pressure cavity, the high-pressure cavity and the unloading cavity;
the high-pressure cavity is communicated with the low-pressure cavity, and the main valve controls the flow of gas flowing into the low-pressure cavity from the high-pressure cavity;
the main valve is of a hollow structure, and the unloading cavity is communicated with the low-pressure cavity through the hollow structure of the main valve;
one end of the valve adjusting unit is hermetically arranged between the low-pressure cavity and the lower shell and is connected with the main valve to adjust the opening of the main valve; the other end of the valve adjusting unit is arranged in the lower shell;
the buffer mechanism is arranged in the auxiliary valve cavity, and the air inlet is formed in one side of the auxiliary valve cavity;
the air inlet is connected with high-pressure gas and is communicated with the high-pressure cavity through the buffer mechanism;
the air outlet is arranged on one side of the low-pressure cavity.
2. The pressure reducing valve having an activated cushioning function according to claim 1, wherein the cushioning mechanism includes: the buffer cavity, the buffer valve core and the buffer spring are arranged in the buffer cavity;
one end of the buffer valve core is communicated with the buffer cavity, and the other end of the buffer valve core is connected with one end of the buffer spring;
the other end of the buffer spring is fixedly connected with the bottom end of the auxiliary valve cavity;
the buffer valve core comprises a main channel, a first throttling hole, a second throttling hole and a buffer throttling channel;
the buffer throttling channel is arranged in parallel with the main channel and is communicated with the main channel through the first throttling hole;
the buffer chamber is communicated with the main passage through the second throttle hole;
the side wall of the buffer throttling channel is connected with one end of the buffer spring;
when the air inlet is not communicated with high-pressure gas, the air inlet is communicated with the high-pressure cavity through the buffer throttling channel; when the air inlet is communicated with high-pressure gas, the high-pressure gas enters the buffer cavity through the first throttling hole and the second throttling hole, the buffer valve core is pressed downwards to drive the main channel and the buffer throttling channel to compress the buffer spring, and the main channel is communicated with the air inlet and the high-pressure cavity.
3. The pressure reducing valve with the starting buffering function as claimed in claim 2, wherein the buffering mechanism further comprises a buffering valve cover and a first sealing ring;
the buffer valve cover is connected with the top end of the auxiliary valve cavity in a sealing manner and is sealed with the buffer valve core to form the buffer cavity;
the first sealing ring is arranged between the buffer valve cover and the auxiliary valve cavity.
4. The pressure reducing valve with start-up damping function according to claim 1, wherein the valve adjusting unit includes a metal diaphragm and a main spring; the metal diaphragm is arranged between the low-pressure cavity and the lower shell, is welded with one end of the main spring and jointly seals the low-pressure cavity;
one end of the main spring is abutted against the main valve, and the other end of the main spring is arranged in the lower shell and used for adjusting the opening of the main valve; the metal diaphragm is connected between one end of the main spring and the lower shell and provides a limiting force for the main spring.
5. The pressure reducing valve with an actuating cushioning function according to claim 4, wherein said valve adjusting unit further includes an adjusting screw;
the adjusting screw penetrates through the bottom end of the lower shell and is connected with one end, mounted in the lower shell, of the main spring, and the adjusting screw is used for adjusting the pre-compression amount of the main spring.
6. The pressure reducing valve with an actuating cushioning function as recited in claim 4, wherein the valve adjusting unit includes a second sealing ring therein, and the second sealing ring is disposed at a connection between the upper housing and the metal diaphragm.
7. The pressure reducing valve with a start-up cushioning function according to claim 1, wherein the main valve includes a main valve cover, an unloading chamber seal seat, a main valve spool, and a main valve seat;
the main valve core penetrates through the unloading cavity sealing seat and the main valve seat;
the main valve cover is connected with the top end of the main valve cavity in a sealing manner and is connected with the upper shell, the unloading cavity sealing seat and the main valve core in a sealing manner to form the unloading cavity;
the unloading cavity sealing seat, the main valve core, the upper shell and the main valve seat form the high-pressure cavity;
the upper housing, the main valve seat and the valve adjusting unit constitute the low pressure chamber.
8. The pressure reducing valve with start buffering function as claimed in claim 7, wherein a protrusion is provided on the side wall of the main spool in the high pressure chamber, and the bottom end of the protrusion is an inclined surface; the main valve seat is provided with a step-shaped structure and forms a valve port opposite to the bottom end of the bulge; the valve port is communicated with the high-pressure cavity and the low-pressure cavity.
9. The pressure reducing valve with start-up cushioning according to claim 7, wherein said main valve further comprises a secondary spring and a third sealing ring;
one end of the auxiliary spring is connected with the main valve cover, and the other end of the auxiliary spring is connected with the main valve core;
the third sealing ring is arranged between the main valve element and the unloading cavity sealing seat.
10. The pressure reducing valve with start-up buffering function according to claim 7, wherein the main spool is provided with a pneumatic balance hole, and the pneumatic balance hole communicates the low-pressure chamber and the unloading chamber through the hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223005849.7U CN218818430U (en) | 2022-11-11 | 2022-11-11 | Pressure reducing valve with starting buffering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223005849.7U CN218818430U (en) | 2022-11-11 | 2022-11-11 | Pressure reducing valve with starting buffering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218818430U true CN218818430U (en) | 2023-04-07 |
Family
ID=87262176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223005849.7U Active CN218818430U (en) | 2022-11-11 | 2022-11-11 | Pressure reducing valve with starting buffering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218818430U (en) |
-
2022
- 2022-11-11 CN CN202223005849.7U patent/CN218818430U/en active Active
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