High-precision high-pressure pressure reducing valve

Abstract

The utility model relates to pressure reducing valve technical field, and disclose a kind of high-precision high-pressure pressure reducing valve, including, valve core and sensitive element, plug cover is installed in valve seat, valve core is arranged in valve seat, by the compact arrangement of valve seat, valve core and sensitive element makes whole structure more compact, cancels the complex pilot valve and main valve combination in traditional pilot pressure reducing valve, reduces component quantity and connecting point, to reduce complexity and potential failure point, by the structure such as installation groove, mounting block, clamping block and clamping groove, ensure the firm connection between valve seat and plug cover, prevent leakage or displacement under high pressure, the effect of wave spring is balanced import pressure, ensure that valve core can work stably under high pressure condition, so that it can withstand larger pressure variation, while maintaining smaller volume and weight.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve technical field, concretely is a kind of high-precision high-pressure pressure reducing valve. BACKGROUND

[0002] Space activities involve a variety of complex fluid systems, such as propulsion systems, life support systems and environmental control systems, etc. In these systems, the pressure of the fluid needs to be accurately controlled. For example, in a rocket propulsion system, the supply pressure of the propellant directly affects the performance of the engine. If the pressure is too high, it may cause the engine to explode and other dangerous situations; if the pressure is too low, it cannot provide enough thrust.

[0003] The space environment conditions are extreme, including high vacuum, wide temperature range (from extremely low temperature to high temperature), micro-meteoroid impact risk, strong space radiation, etc. These conditions pose stringent requirements on the materials and performance of pressure reducing valves. Moreover, space equipment has very high requirements for reliability, and once a pressure reducing valve fails, it may cause the entire space mission to fail.

[0004] However, the existing pilot-operated pressure reducing valve contains multiple components such as a pilot valve and a main valve, which makes its volume and weight larger, not meeting the requirements of space equipment for miniaturization and lightweight. Therefore, there is a need for a high-precision high-pressure pressure reducing valve. SUMMARY

[0005] The utility model provides a kind of high-precision high-pressure pressure reducing valve, the overall structure is more compact, bears larger pressure variation, while keeping the beneficial effects of smaller volume and weight, solve the problem that the existing pilot-operated pressure reducing valve contains multiple components such as a pilot valve and a main valve mentioned in the above background art, which makes its volume and weight larger, not meeting the requirements of space equipment for miniaturization and lightweight.

[0006] The utility model provides the following technical scheme: a kind of high-precision high-pressure pressure reducing valve, including valve seat, valve core and sensitive element, the valve seat is installed with bung, the valve core is arranged in the valve seat, the valve core is located the bung front side, the sensitive element is arranged at the valve core end, the valve seat front side is installed with valve shell, the valve core is internally provided with internal passage, the valve shell end is provided with inlet, the valve shell is externally provided with outlet, the inlet, the outlet and the internal passage are communicated, the valve core is equipped with wave spring, the inlet is provided with filter screen.

[0007] As an optional scheme of the utility model, the valve seat is internally provided with mounting groove, the bung is externally provided with mounting block corresponding to the mounting groove, and the mounting groove and the mounting block are slidably mounted.

[0008] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the mounting block end is equipped with clamping block, the mounting groove is equipped with the clamping groove corresponding with the clamping block, the clamping groove is communicated with the mounting groove, the clamping block is engaged with the clamping groove.

[0009] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the valve housing is equipped with decompression cavity, the valve core is arranged in the decompression cavity, the valve housing is equipped with through port, the through port is arranged as inclined port, the through port is communicated with the decompression cavity.

[0010] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the decompression cavity is equipped with sliding slot, the sliding slot is communicated with the decompression cavity, the valve core is equipped with sliding bar corresponding with the sliding slot, the sliding bar is slidably inserted in the sliding slot.

[0011] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the wave spring is sleeved in the valve core end, one end of the wave spring is in contact with the valve core, the other end of the wave spring is in contact with the inner wall of the valve housing.

[0012] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the valve housing is made of high-temperature-resistant aluminum alloy shell, and the valve core is made of ceramic core.

[0013] As a kind of high-precision high-pressure pressure reducing valve optional scheme of the utility model, wherein: the plug cover is equipped with sealing ring, the sealing ring is made of rubber ring, the valve core is equipped with sealing strip on the side close to the through port, and the sealing strip is made of rubber strip.

[0014] The utility model has the following beneficial effects:

[0015] 1. The high-precision high-pressure pressure reducing valve, by the compact arrangement of valve seat, valve core and sensitive element, the overall structure is more compact, the complex pilot valve and main valve combination in traditional pilot type pressure reducing valve are cancelled, the number of components and connection points are reduced, so as to reduce complexity and potential failure point, through the structure such as mounting groove, mounting block, clamping block and clamping groove, the stable connection between valve seat and plug cover is ensured, leakage or displacement under high pressure is prevented, the wave spring is balanced import pressure, the valve core can work stably under high pressure, so that larger pressure variation can be withstood, while smaller volume and weight are maintained.

[0016] 2、The high-precision high-pressure pressure reducing valve, through the valve shell is set to high-temperature-resistant aluminum alloy shell, can keep stable performance in high-temperature environment, prevent deformation or damage caused by high temperature, through the valve core is set to ceramic core, the thermal expansion coefficient of ceramic material is low, can keep stable size and performance in wide temperature range, reduce the influence of thermal expansion caused by temperature change. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the main body cut structure schematic diagram of the utility model.

[0018] Figure 2 It is the main body cut structure schematic diagram of the utility model.

[0019] Figure 3 It is the main body cut structure schematic diagram of the utility model. Figure 2 Among A place enlarged structure schematic diagram of the utility model.

[0020] Figure 4 It is the main body cut structure schematic diagram of the utility model. Figure 2 Among B place enlarged structure schematic diagram of the utility model.

[0021] In the figure: 110, valve seat;111, valve core;112, plug cover;113, valve shell;114, air inlet;115, gas outlet;116, wave spring;117, filter screen;118, internal passage;119, sensitive element;120, installation groove;121, mounting block;122, clamping block;123, clamping groove;124, decompression cavity;125, through port;130, sliding slot;131, sliding bar;132, sealing ring;133, sealing strip. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment one, this embodiment aims to promote the solution, but the existing pilot pressure reducing valve contains pilot valve and main valve and multiple components, which makes its volume and weight larger, does not meet the miniaturization and light weight requirement of space equipment, please refer to Figures 1-4The utility model provides a high-precision high-pressure pressure reducing valve, including valve seat 110, valve element 111 and sensitive element 119, the plug 112 is installed in valve seat 110, valve element 111 is arranged in valve seat 110, and valve element 111 is located the front side of plug 112, and sensitive element 119 is arranged at the end of valve element 111, and the valve housing 113 is installed in the front side of valve seat 110, the internal passage 118 is seted up in valve element 111, the gas inlet 114 is seted up in the end of valve housing 113, the gas outlet 115 is seted up outside valve housing 113, and the gas inlet 114, the gas outlet 115 are communicated with the internal passage 118, and the wave spring 116 is seted up outside valve element 111, and the filter screen 117 is seted up in the gas inlet 114.

[0024] The installation groove 120 is seted up in valve seat 110, and the installation block 121 corresponding with the installation groove 120 is installed outside plug 112, and the installation groove 120 is slidably installed with the installation block 121.The end of installation block 121 is installed with the clamping block 122, and the clamping groove 123 corresponding with the clamping block 122 is seted up in the installation groove 120, and the clamping groove 123 is communicated with the installation groove 120, and the clamping block 122 is clamped with the clamping groove 123.

[0025] The decompression cavity 124 is seted up in valve housing 113, and valve element 111 is arranged in decompression cavity 124, and the through port 125 is seted up in valve housing 113, and the through port 125 is seted up as the inclined port, and the through port 125 is communicated with decompression cavity 124.The sliding slot 130 is seted up in decompression cavity 124, and the sliding slot 130 is communicated with decompression cavity 124, and the sliding strip 131 corresponding with the sliding slot 130 is installed outside valve element 111, and the sliding strip 131 is slidably inserted in the sliding slot 130.

[0026] The pressure reducing valve is in the closed or initial state, and valve element 111 is kept in a certain position under the action of wave spring 116, at this time, the flow area between gas inlet 114, internal passage 118 and gas outlet 115 is in the minimum or closed state.

[0027] When high-pressure gas enters valve housing 113 through gas inlet 114, it will first pass through filter screen 117 to remove possible impurities or particulate matter, ensuring the purity of the gas. The high-pressure gas contacts the sensitive element 119 at the end of the valve element 111. Because the high-pressure side of the sensitive element 119 has a smaller force area than the low-pressure side, it will generate a force in the direction of movement of the valve element 111. As the high-pressure gas continues to enter, the pressure difference on the sensitive element 119 gradually increases. When this force exceeds the pre-set spring force of the wave spring 116, the valve element 111 will begin to move. The movement of the valve element 111 changes the flow area between the gas inlet 114, the internal passage 118, and the gas outlet 115, allowing a portion of the high-pressure gas to pass through the pressure reducing valve.

[0028] In this process, through the force balance of the sensitive element 119, the pressure reducing valve can accurately control the outlet gas pressure, and ensure it to be stable at the set value. With the flow of outlet gas, if the inlet pressure changes, the sensitive element 119 will immediately sense the change and quickly adjust the flow area through the movement of the valve core 111.

[0029] This dynamic adjustment process can ensure that the pressure reducing valve can output low-pressure gas with a set pressure stably under various inlet pressure conditions. Through the structures such as the mounting groove 120, the mounting block 121, the clamping block 122, and the clamping groove 123, the stable connection between the valve seat 110 and the plug cover 112 is ensured, preventing leakage or displacement under high pressure. At the same time, the design of the sliding groove 130 and the sliding bar 131 makes the valve core 111 stable during movement, further enhancing the reliability and safety of the pressure reducing valve.

[0030] In this scheme, the sensitive element 119 specifically refers to an element that can respond to pressure changes, usually in the form of a diaphragm or a piston. The main function of this sensitive element 119 is to sense changes in inlet pressure and convert them into mechanical displacement, thereby controlling the movement of the valve core 111.

[0031] In this embodiment: through the compact arrangement of the valve seat 110, the valve core 111, and the sensitive element 119, the overall structure is more compact, eliminating the complex combination of pilot valve and main valve in traditional pilot pressure reducing valves, reducing the number of components and connection points, thereby reducing complexity and potential failure points, through the structures such as the mounting groove 120, the mounting block 121, the clamping block 122, and the clamping groove 123, the stable connection between the valve seat 110 and the plug cover 112 is ensured, preventing leakage or displacement under high pressure, the role of the wave spring 116 is to balance the inlet pressure, ensuring that the valve core 111 can work stably under high pressure conditions, so that it can withstand larger pressure changes while maintaining smaller volume and weight.

[0032] Embodiment two, this embodiment aims to promote the solution to the problem that the performance of the valve shell 113 and the valve core 111 may be unstable under high temperature and corrosive environment, this embodiment is an improvement based on embodiment one, for details, please refer to Figures 1-4The wave spring 116 is sleeved on the end of the valve core 111, one end of the wave spring 116 is in contact with the valve core 111, and the other end of the wave spring 116 is in contact with the inner wall of the valve shell 113. The valve shell 113 is provided as a high-temperature-resistant aluminum alloy shell, and the valve core 111 is provided as a ceramic core. The sealing ring 132 is mounted outside the plug 112, and the sealing ring 132 is provided as a rubber ring. The rubber ring has good sealing performance, can effectively prevent high-pressure gas leakage, and improves the overall sealing performance of the pressure reducing valve. The sealing strip 133 is mounted on the side of the valve core 111 close to the through hole 125, and the sealing strip 133 is provided as a rubber strip, so that the sealing effect between the valve core 111 and the valve shell 113 is enhanced, and gas leakage is prevented. The rubber strip has good elasticity and wear resistance, can maintain stable sealing effect under high pressure and frequent movement, and improves the reliability of the pressure reducing valve.

[0033] In the embodiment: the valve shell 113 is provided as a high-temperature-resistant aluminum alloy shell, which can maintain stable performance in a high-temperature environment and prevent deformation or damage caused by high temperature, and the valve core 111 is provided as a ceramic core, and the thermal expansion coefficient of the ceramic material is low, which can maintain stable size and performance in a wide temperature range and reduce the influence of thermal expansion caused by temperature change.

[0034] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0035] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A high-precision high-pressure pressure-reducing valve comprising a valve seat (110), a valve core (111) and a sensitive element (119), characterized in that: The valve seat (110) is internally provided with a plug cover (112), the valve core (111) is arranged in the valve seat (110), the valve core (111) is located in front of the plug cover (112), the sensitive element (119) is arranged at the end of the valve core (111), the valve seat (110) is provided with a valve shell (113) in front, the valve core (111) is internally provided with an internal passage (118), the valve shell (113) is internally provided with an air inlet (114), the valve shell (113) is externally provided with an air outlet (115), the air inlet (114), the air outlet (115) and the internal passage (118) are communicated, the valve core (111) is externally provided with a wave spring (116), and the air inlet (114) is provided with a filter screen (117).

2. The high-precision high-pressure pressure reducing valve according to claim 1, characterized by: The valve seat (110) is internally provided with a mounting groove (120), the plug cover (112) is externally provided with a mounting block (121) corresponding to the mounting groove (120), and the mounting groove (120) and the mounting block (121) are slidably mounted.

3. The high-precision high-pressure pressure reducing valve according to claim 2, characterized by: The mounting block (121) is provided with a clamping block (122) at the end, the mounting groove (120) is internally provided with a clamping groove (123) corresponding to the clamping block (122), the clamping groove (123) and the mounting groove (120) are communicated, and the clamping block (122) is clamped with the clamping groove (123).

4. The high-precision high-pressure pressure reducing valve according to claim 1, characterized by: The valve shell (113) is internally provided with a decompression cavity (124), the valve core (111) is arranged in the decompression cavity (124), the valve shell (113) is internally provided with a through port (125), the through port (125) is arranged as an inclined port, and the through port (125) and the decompression cavity (124) are communicated.

5. The high-precision high-pressure pressure-reducing valve according to claim 4, characterized by: The decompression cavity (124) is internally provided with a sliding groove (130), the sliding groove (130) and the decompression cavity (124) are communicated, the valve core (111) is externally provided with a sliding bar (131) corresponding to the sliding groove (130), and the sliding bar (131) is slidably inserted into the sliding groove (130).

6. The high-precision high-pressure pressure reducing valve according to claim 1, characterized by: The wave spring (116) is sleeved at the end of the valve core (111), one end of the wave spring (116) abuts against the valve core (111), and the other end of the wave spring (116) abuts against the inner wall of the valve shell (113).

7. The high-precision high-pressure pressure-reducing valve according to claim 1, characterized by: The valve shell (113) is made of high-temperature-resistant aluminum alloy, and the valve core (111) is made of ceramic.

8. The high-precision high-pressure pressure reducing valve according to claim 4, characterized by: The plug cover (112) is externally provided with a sealing ring (132), the sealing ring (132) is arranged as a rubber ring, the valve core (111) is provided with a sealing strip (133) close to the through port (125), and the sealing strip (133) is arranged as a rubber strip.

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