Pressure regulating combination valve convenient for replacing gas filter element
By designing a pressure regulating combination valve that is easy to replace the air filter element, integrating a check valve, a pressure reducing valve and an air filter, the problems of high costs, low air tightness and complex maintenance caused by excessive equipment in the prior art are solved, and the effects of lower cost, high air tightness and simplified maintenance are achieved.
Patent Information
- Application Number
- CN202420762724.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Excessive equipment in the existing aircraft cockpit pressure system leads to high economic costs, reduced airtight reliability, difficulty in positioning of faults, long installation time and increased aircraft weight.
A pressure regulating combination valve is designed to facilitate the replacement of the air filter element. The integrated one-way valve, pressure reducing valve and air filter are integrated through an integrated shell to reduce pipeline connections, improve air tightness reliability, and connect the air filter element in the form of threads to simplify the replacement process.
Reduces system costs, improves airtight reliability of pipeline connections, simplifies fault location and maintenance processes, and reduces aircraft weight.
Smart Images
Figure CN222687376U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aircraft cabin pressure, in particular to a pressure regulating combined valve which is convenient for replacing an air filter element. Background Art
[0002] In order to ensure the working pressure in the cabin during the flight of the aircraft, it is usually adopted to bleed air from the engine to the cabin to ensure the working pressure in the cabin. There are two ways of engine bleed air, one is the duct bleed air of the turbofan engine, and the other is the flow duct bleed air of the turbofan and turboprop engines. However, the gas bleed out by the two bleed air methods is a high-pressure gas source, so it must be processed before being introduced into the aircraft cabin to ensure that the gas pressure meets the cabin pressure requirements.
[0003] At present, the treatment method adopted is to install an air filter, a pressure reducer, a one-way valve, and a safety valve on the bleed air pipeline, and the high-pressure gas of the engine enters the aircraft cabin after passing through the air filter, the pressure reducer, the one-way valve, and the safety valve. Among them, the air filter is used to filter impurities in the bleed air pipeline to prevent impurities from entering the pipeline and then entering the aircraft cabin through the pipeline; the pressure reducer is used to reduce the pressure of the gas entering the aircraft cabin; the safety valve is used to prevent the gas pressure in the aircraft cabin from being too high. When the pressure in the aircraft cabin exceeds the set value, the safety valve opens, and the pressure in the aircraft cabin is released to the outside through the safety valve, thereby ensuring that the internal pressure of the aircraft cabin is maintained within the design allowable range.
[0004] However, there are some problems with the above-mentioned treatment method: 1. Too much equipment is required, resulting in high economic costs, and the cabin air intake is a closed system. During the installation process, too many connection points will reduce the airtight reliability of the pipeline; 2. Too many equipment are required, which increases the probability of equipment failure and is not conducive to fault location; 3. Since all equipment needs to be connected by pipelines and the internal space of the aircraft is small, more short pipelines are required, which increases the installation time during ground inspection and maintenance; 4. Since each device needs to be installed and fixed with a bracket, the number of machined parts is increased, which increases the weight of the aircraft. Summary of the invention
[0005] In order to overcome the deficiencies of the prior art, the utility model provides a pressure regulating combined valve which is convenient for replacing an air filter element.
[0006] The technical solution of the utility model is:
[0007] A pressure regulating combined valve for convenient replacement of an air filter element, comprising a housing, a one-way valve, a pressure reducing valve, an air filter element and an outlet nozzle;
[0008] A one-way valve installation cavity is provided on the left side of the shell for installing the one-way valve; a pressure reducing valve installation cavity is provided on the lower side of the shell for installing the pressure reducing valve; an outlet air passage coaxial with the one-way valve installation cavity is provided on the right side of the shell; connecting air passages are provided between the one-way valve installation cavity and the pressure reducing valve installation cavity, and between the pressure reducing valve installation cavity and the outlet air passage for forming a gas passage;
[0009] The one-way valve is sealed and fixed in the one-way valve installation cavity of the housing and is a gas inlet end for connecting to an external high-pressure gas source;
[0010] The pressure reducing valve is sealed and fixed in the pressure reducing valve installation cavity of the shell, and is a gas pressure reducing exhaust end, and is used to ensure that the gas pressure passing through the combination valve meets the pressure requirements in the cabin;
[0011] The air filter element is detachably installed in the outlet air passage of the housing;
[0012] The outlet nozzle is arranged at the right end of the outlet air passage of the shell, which is the gas outlet end and is used to transport the bleed air into the cabin.
[0013] Furthermore, the inner wall of the one-way valve installation cavity of the shell is provided with threads, and the one-way valve is installed in the one-way valve installation cavity by threaded sealing; the pressure reducing valve installation cavity of the shell is divided into an upper section and a lower section, the diameter of the upper section is smaller than the diameter of the lower section, the inner wall of the lower section is provided with threads, and the pressure reducing valve is installed in the pressure reducing valve installation cavity by threaded sealing of the inner wall of the lower section; the inner wall of the outlet air duct of the shell is provided with threads, and the end of the air filter element is provided with external threads matching the threads of the inner wall of the outlet air duct, and is installed in the outlet air duct of the shell by threads; the outlet nozzle is fixed to the right end of the shell by a countersunk screw to encapsulate the air filter element in the outlet air duct to form an air filtering function; a sealing gasket is provided between the outlet nozzle and the shell to ensure air tightness.
[0014] Furthermore, a first connecting air channel coaxial with the one-way valve mounting chamber is provided between the one-way valve mounting chamber and the pressure reducing valve mounting chamber, connecting the one-way valve mounting chamber and the pressure reducing valve mounting chamber; a second connecting air channel is provided between the lower shoulder of the pressure reducing valve mounting chamber and the outlet air channel, connecting the pressure reducing valve mounting chamber and the outlet air channel; a hexagonal mounting portion is provided on the left side of the exterior of the shell, and a safety pin hole is provided at the upper end of the hexagonal mounting portion.
[0015] Further, the one-way valve comprises a one-way valve mounting base, a one-way valve body, a spherical valve core, a one-way valve spring and a first spring seat;
[0016] The one-way valve mounting base is open on the left side, and a valve body mounting cavity is provided inside. The inner wall of the valve body mounting cavity is provided with a thread for mounting the one-way valve body; a hexagonal mounting portion is provided on the left side of the one-way valve mounting base, and a safety pin hole is provided at the upper end of the hexagonal mounting portion. A limit stop is provided on the right side of the hexagonal mounting portion, and an external thread matching the internal thread of the one-way valve mounting cavity on the left side of the shell is provided on the right side of the limit stop. The one-way valve mounting base is fixedly connected to the one-way valve mounting cavity on the left side of the shell through the external thread, and a sealing ring is provided at the root of the limit stop to ensure the air tightness of the connection; the diameter of the right section of the one-way valve mounting base is smaller than that of the one-way valve mounting cavity. When the one-way valve mounting base is installed in the one-way valve mounting cavity, a gap between the two forms an air channel; a plurality of first air holes are provided on the side of the right section of the one-way valve mounting base, connecting the valve body mounting cavity and the one-way valve mounting cavity; a fairing is provided on the outer side of the first air hole, and a plurality of second air holes are provided on the fairing, and the size of the second air holes is smaller than that of the first air holes;
[0017] The one-way valve body is provided with an inlet nozzle on the left side for connecting to an air source; a hexagonal mounting portion is provided on the right side of the outside of the inlet nozzle, a safety pin hole is provided on the upper end of the hexagonal mounting portion, and an external thread matching the internal thread of the valve body mounting cavity of the one-way valve mounting base is provided on the right side of the hexagonal mounting portion, the one-way valve body is fixedly connected to the valve body mounting cavity through the external thread, and a sealing ring is provided between the hexagonal mounting portion and the external thread to ensure the air tightness of the connection; the diameter of the right section of the one-way valve body is smaller than that of the valve body mounting cavity, and when the one-way valve body is installed in the valve body mounting cavity, there is a gap between the two to form an airway;
[0018] The inside of the one-way valve body is connected, and from left to right there are the first air channel, the second air channel and the valve core installation cavity; the diameter of the first air channel is smaller than the diameter of the second air channel, and the diameter of the second air channel is smaller than the diameter of the valve core installation cavity; an annular protrusion is provided at the right end of the second air channel, and the spherical valve core is provided at the annular protrusion; one end of the one-way valve spring presses against the spherical valve core, and then presses the spherical valve core against the annular protrusion at the end of the second air channel, and the other end is pressed by the first spring seat to form the opening pressure of the spherical valve core when the one-way valve is working; the first spring seat is fixedly connected to the right bottom end of the valve core installation cavity through a card groove seal;
[0019] A valve core movable cavity is also provided at the bottom of the left side of the valve core installation cavity. The diameter of the valve core movable cavity is larger than the diameter of the valve core installation cavity, which is used to provide sufficient space when the valve core is pushed open by gas; a third air hole is provided on the side of the valve core movable cavity, connecting the valve core installation cavity with the valve body installation cavity.
[0020] Further, the pressure reducing valve comprises a valve mounting seat, a valve core, a plug cap, a pressure reducing valve spring, a second spring seat, a valve base and an exhaust pipe nozzle;
[0021] The valve mounting seat is divided into three sections: an upper section, a middle section and a lower section; an outer surface of the lower section of the valve mounting seat is provided with an external thread matching the inner wall thread of the pressure reducing valve mounting chamber of the shell, and the valve mounting seat is installed in the pressure reducing valve mounting chamber through the thread; a limit stop is provided at the bottom of the lower section of the valve mounting seat; the diameters of the upper and middle sections of the valve mounting seat are smaller than the diameter of the upper section of the pressure reducing valve mounting chamber of the shell, and when the valve mounting seat is installed in the pressure reducing valve mounting chamber, there are gaps between the upper section of the valve mounting seat and the upper section of the pressure reducing valve mounting chamber, and between the middle section of the valve mounting seat and the lower section of the pressure reducing valve mounting chamber to form an airway; a limit convex is provided between the upper and middle sections of the valve mounting seat, the diameter of the limit convex matches the diameter of the upper section of the pressure reducing valve mounting chamber, a groove is provided on the limit convex, and a sealing ring is provided in the groove to ensure the air tightness of the connection;
[0022] The interior of the valve mounting seat is through-connected and used for mounting the valve core; the upper end of the valve mounting seat is provided with a plugging cap for limiting the upper end of the valve core; a sealing ring is provided between the valve mounting seat and the plugging cap to ensure the air tightness of the connection; the interior of the valve mounting seat is divided into a third air channel and a fourth air channel from top to bottom; the diameter of the third air channel is larger than that of the fourth air channel, and an annular protrusion is provided at the upper end of the fourth air channel where it is connected to the third air channel; a fourth air hole is provided on the side of the upper section of the valve mounting seat to connect the third air channel with the upper section of the pressure reducing valve mounting chamber; a fifth air hole is provided on the side of the middle section of the valve mounting seat, The fourth air passage is connected with the lower section of the pressure reducing valve installation chamber; the lower section of the valve installation seat is provided with an annular spring installation chamber around the fourth air passage; a sixth air hole is provided at the top of the upper left end of the spring installation chamber, connecting the spring installation chamber with the lower section of the pressure reducing valve installation chamber; a seventh air hole is provided at the bottom of the lower left end of the spring installation chamber, connecting the spring installation chamber with the fourth air passage; the pressure reducing valve spring is sleeved in the spring installation chamber, and the lower end of the pressure reducing valve spring is provided with the second spring seat, which is used to resist the pressure reducing valve spring, and the pressure of the valve core of the pressure reducing valve valve is ensured to be pushed open by the reaction force of the pressure reducing valve spring;
[0023] The valve valve core is slidably installed in the third air channel and the fourth air channel of the valve mounting seat; the valve valve core is divided into three sections: an upper section, a middle section and a lower section; an axial fifth air channel is provided in the center of the upper section of the valve valve core, the upper end of the fifth air channel is open, and the lower end extends to the middle section of the valve valve core; an eighth air hole is provided at the upper end of the fifth air channel, connecting the fifth air channel and the third air channel of the valve mounting seat; a ninth air hole is provided at the lower end of the fifth air channel, connecting the fifth air channel and the fourth air channel of the valve mounting seat; the diameter of the upper section of the valve valve core matches the inner diameter of the blocking cap, and a groove is circumferentially provided at the end of the upper section of the valve valve core, and a sealing ring is provided in the groove to ensure the air tightness of the valve valve core and the blocking cap; a limit stop is provided between the upper section and the middle section of the valve valve core, and a groove is provided on the lower end surface of the limit stop, and a sealing ring is provided in the groove, which can be stuck on the valve mounting seat The annular protrusion at the upper end of the fourth air channel of the valve core is used to ensure the air tightness of the connection; the diameter of the middle section of the valve valve core is smaller than the fourth air channel of the valve mounting seat; the diameter of the lower section of the valve valve core matches the diameter of the fourth air channel of the valve mounting seat, and the lower section of the valve valve core is circumferentially provided with a plurality of grooves, and a sealing ring is provided in the groove to ensure the air tightness of the valve valve core and the fourth air channel; a clamping groove is provided at the end of the lower section of the valve valve core, and a clamping hole matching the clamping groove is provided in the middle of the second spring seat, and the second spring seat can clamp the lower end head of the valve valve core on the lower side of the second spring seat while pressing the pressure reducing valve spring; the exhaust pipe nozzle is provided below the second spring seat; the valve base is fixedly connected to the bottom of the shell by a countersunk screw and presses against the second spring seat, and a sealing gasket is provided between the valve base and the shell to ensure air tightness.
[0024] When the induced air pushes open the spherical valve core through the first air channel and the second air channel of the one-way valve, it passes through the third air hole, the first air hole and the second air hole in turn, enters the gap between the one-way valve and the shell, and then passes through the first connecting air channel to enter the gap between the shell and the upper section of the pressure reducing valve installation chamber. 1) When the air flow pressure does not exceed the set pressure, the air flow passes through the fourth air hole, the third air channel, the fourth air channel, and the fifth air hole in the upper section of the valve mounting seat in turn to enter the gap between the pressure reducing valve and the shell, and then passes through the second connecting air channel to enter the outlet air channel of the shell, and flows out after being filtered by the air filter element; 2) When the air flow pressure exceeds the set pressure, the air flow passes through the fourth air hole, the third air channel, the fourth air channel, and the fifth air hole in the upper section of the valve mounting seat in turn. The eighth air hole on the upper section of the valve core enters into the fifth air channel inside the valve core and the gap between the valve core and the plugging cap, pushing the valve core downward and pressing against the annular protrusion at the upper end of the fourth air channel. On the one hand, the air flow channel inside the valve core is reduced, reducing the gas flow rate. On the other hand, the air flow passes through the ninth air hole and the fifth air hole of the valve core from the fifth air channel in sequence and enters into the gap between the pressure reducing valve and the shell, and then passes through the sixth air hole and the seventh air hole of the spring mounting cavity and enters into the exhaust pipe nozzle, expelling part of the gas, thereby achieving the pressure reducing effect. After pressure reducing, under the action of the pressure reducing valve spring, the valve core is reset upward, and the gas meeting the pressure requirement flows into the outlet air channel again, and then flows out after being filtered by the air filter element.
[0025] Furthermore, the shell is one-piece, and the internal mounting cavities, air holes, and air passages are all formed by machining.
[0026] Furthermore, the inlet nozzle, outlet nozzle and exhaust nozzle all adopt HB-74° cone angle joint interface, which is convenient for connection with pipelines.
[0027] Furthermore, the one-way valve spring is selected according to the pressure required for opening the one-way valve spherical valve core; the pressure reducing valve spring is selected according to the pressure required for pushing open the valve core of the pressure reducing valve.
[0028] Beneficial Effects
[0029] The utility model provides a pressure-regulating combination valve which is convenient for replacing an air filter element. A one-way valve, a pressure reducing valve and an air filter are integrated into an integrated combination valve through an integrated shell. In terms of economy, the cost of the utility model is lower than the combined cost of a conventional one-way valve, a safety valve, a pressure reducer and an air filter, and after integration, the pipeline connection is effectively reduced, which can improve the airtight reliability of the pipeline connection. In terms of practicality, the utility model is conducive to fault location, which can reduce the failure rate of conventional equipment, and the air filter element is connected in the outlet air duct in a threaded form, which can avoid running back and forth and shifting during use. The air filter element can be replaced by packaging the outlet nozzle and disassembling the outlet nozzle, which is simpler and faster in installation and maintenance. In terms of weight, the weight of the utility model is less than the combined weight of a conventional one-way valve, a safety valve, a pressure reducer and an air filter, which is conducive to further reducing the weight of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0031] in, Figure 1 (a) is the front view, Figure 1 (b) is the front view, Figure 1 (c) is a top view, Figure 1 (d) is a bottom view;
[0032] Figure 2 It is a schematic diagram of an overall cross-section of an embodiment of the utility model;
[0033] Figure 3 The air filter element of the utility model embodiment is intended;
[0034] Figure 4 A schematic diagram of a housing of an embodiment of the utility model;
[0035] Figure 5 A schematic diagram of a one-way valve according to an embodiment of the utility model;
[0036] Figure 6 This is a schematic diagram of a one-way valve installation base according to an embodiment of the utility model;
[0037] Figure 7 A schematic diagram of a one-way valve body according to an embodiment of the utility model;
[0038] Figure 8 A schematic diagram of a pressure reducing valve according to an embodiment of the utility model;
[0039] Fig. 9 A schematic diagram of a valve mounting seat of a pressure reducing valve according to an embodiment of the utility model;
[0040] Fig.10 A schematic diagram of a valve core of a pressure reducing valve according to an embodiment of the utility model;
[0041] In the figure: 1-housing; 11-one-way valve installation cavity; 12-pressure reducing valve installation cavity; 121-pressure reducing valve installation cavity upper section; 122-pressure reducing valve installation cavity lower section; 13-export airway; 14-first connecting airway; 15-second connecting airway; 16-housing hexagonal installation part; 17-housing pin hole; 2-one-way valve; 21-one-way valve installation base; 211-valve body installation cavity; 212-inner thread of valve body installation cavity; 213-one-way valve installation base hexagonal installation part; 214-one-way valve installation base pin hole; 215-limited stop; 216-outer thread of valve body installation cavity 217-first air hole; 218-fairing cover; 219-second air hole; 22-one-way valve body; 221-inlet nozzle; 222-one-way valve body hexagonal mounting portion; 223-one-way valve body pin hole; 224-one-way valve body thread; 225-first air channel; 226-second air channel; 227-valve core installation cavity; 228-second air channel annular protrusion; 229-one-way valve body card slot; 2210-valve core activity cavity; 2211-third air hole; 23-spherical valve core; 24-one-way valve spring; 25-first spring seat; 3-pressure reducing valve; 31-valve mounting seat; 311-upper section of valve mounting seat; 312-middle section of valve mounting seat; 313-lower section of valve mounting seat; 314-limit stopper of valve mounting seat; 315-limiting convex of valve mounting seat; 316-groove of limiting convex of valve mounting seat; 317-third air channel; 318-fourth air channel; 319-annular convex of fourth air channel; 3110-fourth air hole; 3111-fifth air hole; 3112-spring mounting cavity; 3113-sixth air hole; 3114-seventh air hole; 32-valve valve core; 321-upper section of valve valve core; 322- The middle section of the valve core; 323-the lower section of the valve core; 324-the fifth air channel; 325-the eighth air hole; 326-the ninth air hole; 327-the groove of the upper section of the valve core; 328-the limit stop of the valve core; 329-the groove of the limit stop of the valve core; 3210-the groove of the lower section of the valve core; 3211-the slot at the head of the valve core; 33-the plugging cap; 34-the pressure reducing valve spring; 35-the second spring seat; 36-the valve base; 37-the exhaust nozzle; 4-the air filter element; 41-the filter element thread; 5-the outlet nozzle; 6-the countersunk screw; 7-the sealing gasket; 8-the sealing ring. DETAILED DESCRIPTION
[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:
[0043] like Figure 1 , Figure 2 , Figure 3 As shown, a pressure regulating combination valve for convenient replacement of an air filter element comprises a housing 1, a one-way valve 2, a pressure reducing valve 3, an air filter element 4 and an outlet nozzle 5;
[0044] like Figure 4 As shown, a one-way valve installation cavity 11 is provided on the left side of the housing 1 for installing the one-way valve 2; a pressure reducing valve installation cavity 12 is provided on the lower side of the housing 1 for installing the pressure reducing valve 3; an outlet airway 13 coaxial with the one-way valve installation cavity 11 is provided on the right side of the housing 1; connecting airways are provided between the one-way valve installation cavity 11 and the pressure reducing valve installation cavity 12, and between the pressure reducing valve installation cavity 12 and the outlet airway 13 for forming a gas passage;
[0045] The one-way valve 2 is sealed and fixed in the one-way valve installation cavity 11 of the housing 1 and is a gas inlet end for connecting to an external high-pressure gas source;
[0046] The pressure reducing valve 3 is sealed and fixed in the pressure reducing valve installation cavity 12 of the housing 1 and is a gas pressure reducing exhaust end, which is used to ensure that the gas pressure passing through the combination valve meets the pressure requirements in the cabin;
[0047] The air filter element 4 is detachably installed in the outlet air passage 13 of the housing 1;
[0048] The outlet nozzle 5 is disposed at the right end of the outlet air passage 13 of the shell 1 and is a gas outlet end for conveying bleed air into the cabin.
[0049] In this embodiment, the inner wall of the one-way valve installation cavity 11 of the housing 1 is provided with threads, and the one-way valve 2 is installed in the one-way valve installation cavity 11 through threaded sealing; the pressure reducing valve installation cavity 12 of the housing 1 is divided into an upper section 121 and a lower section 122, the diameter of the upper section 121 is smaller than the diameter of the lower section 122, the inner wall of the lower section 122 is provided with threads, and the pressure reducing valve 3 is installed in the pressure reducing valve installation cavity 12 through the threaded sealing of the inner wall of the lower section 122; the inner wall of the outlet air duct 13 of the housing 1 is provided with threads, and the end of the air filter element 4 is provided with an external thread 41 matching the inner wall thread of the outlet air duct 13, and is installed in the outlet air duct 13 of the housing 1 through threads, such as Figure 3 As shown; the outlet nozzle 5 is fixed to the right end of the shell 1 by a countersunk screw 6 to encapsulate the air filter element 4 in the outlet air duct 13 to form an air filtering function; a sealing gasket 7 is provided between the outlet nozzle 5 and the shell 1 to ensure air tightness.
[0050] In this embodiment, a first connecting air passage 14 coaxial with the one-way valve mounting chamber 11 is provided between the one-way valve mounting chamber 11 and the pressure reducing valve mounting chamber 12, connecting the one-way valve mounting chamber 11 and the pressure reducing valve mounting chamber 12; a second connecting air passage 15 is provided between the shoulder of the lower section 122 of the pressure reducing valve mounting chamber and the outlet air passage 13, connecting the pressure reducing valve mounting chamber 12 and the outlet air passage 13; a hexagonal mounting portion 16 is provided on the left side of the exterior of the shell 1, and a safety pin hole 17 is provided at the upper end of the hexagonal mounting portion.
[0051] In this embodiment, if Figure 5 , Figure 6 , Figure 7 As shown, the one-way valve 2 includes a one-way valve mounting base 21, a one-way valve body 22, a spherical valve core 23, a one-way valve spring 24 and a first spring seat 25;
[0052] like Figure 6 As shown, the one-way valve mounting base 21 is open on the left side, and a valve body mounting cavity 211 is provided inside, and a thread 212 is provided on the inner wall of the valve body mounting cavity 211 for mounting the one-way valve body 22; a hexagonal mounting portion 213 is provided on the left side of the one-way valve mounting base 21, and a safety pin hole 214 is provided on the upper end of the hexagonal mounting portion 213, and a limit stop 215 is provided on the right side of the hexagonal mounting portion 213, and an external thread 216 matching the internal thread of the one-way valve mounting cavity 11 on the left side of the shell is provided on the right side of the limit stop 215, and the one-way valve mounting base 21 is fixedly connected to the one-way valve mounting cavity 11 of the shell 1 through the external thread 216. In the cavity 11, a sealing ring 8 is provided at the root of the limit stop 215 to ensure the air tightness of the connection; the diameter of the right section of the one-way valve mounting base 21 is smaller than the one-way valve mounting cavity 11, and when the one-way valve mounting base 21 is installed in the one-way valve mounting cavity 11, there is a gap between the two to form an air passage; a plurality of first air holes 217 are provided on the side of the right section of the one-way valve mounting base 21, connecting the valve body mounting cavity 211 and the one-way valve mounting cavity 11; a fairing 219 is sleeved on the outer side of the first air hole 217, and a plurality of second air holes 219 are provided on the fairing 218, and the size of the second air holes 219 is smaller than the first air holes 217;
[0053] like Figure 7 As shown, an inlet nozzle 221 is provided on the left side of the one-way valve body 22 for connecting to an air source; a hexagonal mounting portion 222 is provided on the right side of the outside of the inlet nozzle 221, a safety pin hole 223 is provided at the upper end of the hexagonal mounting portion 222, and an external thread 224 matching the internal thread of the valve body mounting cavity 211 of the one-way valve mounting base 21 is provided on the right side of the hexagonal mounting portion 222, and the one-way valve body 22 is fixedly connected to the valve body mounting cavity 211 through the external thread 224, and a sealing ring 8 is provided between the hexagonal mounting portion 222 and the external thread 224 to ensure the air tightness of the connection; the diameter of the right section of the one-way valve body 22 is smaller than that of the valve body mounting cavity 211, and when the one-way valve body 22 is installed in the valve body mounting cavity 211, there is a gap between the two to form an airway;
[0054] The inside of the one-way valve body 22 is connected, and from left to right there are the first air channel 225, the second air channel 226 and the valve core installation cavity 227; the diameter of the first air channel 225 is smaller than the diameter of the second air channel 226, and the diameter of the second air channel 226 is smaller than the diameter of the valve core installation cavity 227; an annular protrusion 228 is provided at the right end of the second air channel 226; one end of the one-way valve spring 24 presses against the spherical valve core 23, thereby pressing the spherical valve core 23 against the annular protrusion 228 at the end of the second air channel 226, and the other end is pressed by the first spring seat 25, forming the opening pressure of the spherical valve core 23 when the one-way valve 2 is working; the first spring seat 25 is sealed and fixedly connected to the right bottom end of the valve core installation cavity 227 through the card groove 229;
[0055] A valve core movable chamber 2210 is also provided at the left bottom of the valve core installation chamber 227. The diameter of the valve core movable chamber 2210 is larger than the diameter of the valve core installation chamber 227, and is used to provide sufficient space for the spherical valve core 23 to be pushed open by gas. A third air hole 2211 is provided on the side of the valve core movable chamber 2210, connecting the valve core installation chamber 227 with the valve body installation chamber 211.
[0056] In this embodiment, if Figure 2 , Figure 8 , Fig. 9 , Fig.10 As shown, the pressure reducing valve 3 includes a valve mounting seat 31, a valve core 32, a plug cap 33, a pressure reducing valve spring 34, a second spring seat 35, a valve base 36 and an exhaust pipe nozzle 37;
[0057] like Fig. 9 As shown, the valve mounting seat 31 is divided into three sections: an upper section 311, a middle section 312, and a lower section 313; the outer surface of the lower section 313 of the valve mounting seat is provided with an external thread matching the inner wall thread of the pressure reducing valve mounting chamber 12 of the housing 1, and the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12 through the thread; a limit stop 314 is provided at the bottom of the lower section 313 of the valve mounting seat; the diameters of the upper section 311 and the middle section 312 of the valve mounting seat are smaller than the diameter of the upper section 121 of the pressure reducing valve mounting chamber of the housing, when the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12, the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12 through the thread; the lower section 313 of the valve mounting seat is provided with a limit stop 314; the diameters of the upper section 311 and the middle section 312 of the valve mounting seat are smaller than the diameter of the upper section 121 of the pressure reducing valve mounting chamber of the housing, when the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12, the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12, and the valve mounting seat 31 is installed in the pressure reducing valve mounting chamber 12. The valve mounting seat 31 is installed in the pressure reducing valve mounting cavity 12, and there are gaps between the upper section 311 of the valve mounting seat and the upper section 121 of the pressure reducing valve mounting cavity, and between the middle section 312 of the valve mounting seat and the lower section 122 of the pressure reducing valve mounting cavity to form an air passage; a limiting protrusion 315 is provided between the upper section 311 and the middle section 312 of the valve mounting seat, and the diameter of the limiting protrusion 315 matches the diameter of the upper section 121 of the pressure reducing valve mounting cavity, and a groove 316 is provided on the limiting protrusion, and a sealing ring 8 is provided in the groove 316 to ensure the air tightness of the connection;
[0058] The valve mounting seat 31 is internally connected and is used to mount the valve core 32; the upper end of the valve mounting seat 31 is provided with a plugging cap 33, which is used to provide a limit for the upper end of the valve core 32; a sealing ring 8 is provided between the valve mounting seat 31 and the plugging cap 33 to ensure the airtightness of the connection. Figure 8 As shown; the interior of the valve mounting seat 31 is divided into a third air channel 317 and a fourth air channel 318 from top to bottom; the diameter of the third air channel 317 is larger than that of the fourth air channel 318, and an annular protrusion 319 is provided at the upper end of the fourth air channel 318 where it is connected to the third air channel 317; a fourth air hole 3110 is provided on the side of the upper section 311 of the valve mounting seat, connecting the third air channel 317 with the upper section 121 of the pressure reducing valve mounting chamber; a fifth air hole 3111 is provided on the side of the middle section 312 of the valve mounting seat, connecting the fourth air channel 318 with the lower section 122 of the pressure reducing valve mounting chamber; the valve mounting seat The lower section 313 is provided with an annular spring installation cavity 3112 around the fourth air passage 318; a sixth air hole 3113 is provided at the top of the upper left end of the spring installation cavity 3112, connecting the spring installation cavity 3112 with the lower section 122 of the pressure reducing valve installation cavity; a seventh air hole 3114 is provided at the bottom of the lower left end of the spring installation cavity 3112, connecting the spring installation cavity 3112 with the fourth air passage 318; the pressure reducing valve spring 34 is sleeved in the spring installation cavity 3112, and the lower end of the pressure reducing valve spring 34 is provided with the second spring seat 35, which is used to resist the pressure reducing valve spring 34, such as Figure 8 As shown, the pressure of the pressure reducing valve valve core 32 being pushed open is ensured by the reaction force of the pressure reducing valve spring 34;
[0059] The valve core 32 is slidably mounted in the third air passage 317 and the fourth air passage 318 of the valve mounting seat; Fig.10 As shown, the valve core 32 is divided into three sections: an upper section 321, a middle section 322, and a lower section 323; an axial fifth air channel 324 is provided at the center of the upper section 321 of the valve core, the upper end of the fifth air channel 324 is open, and the lower end extends to the middle section 322 of the valve core; an eighth air hole 325 is provided at the upper end of the fifth air channel 324, connecting the fifth air channel 324 and the third air channel 317 of the valve mounting seat 31; a ninth air hole 326 is provided at the lower end of the fifth air channel 324, connecting the fifth air channel 324 and the fourth air channel 318 of the valve mounting seat 31; the diameter of the upper section 321 of the valve core matches the inner diameter of the plugging cap 33, and a groove 327 is circumferentially provided at the end of the upper section 321 of the valve core, and a sealing ring 8 is provided in the groove 327, as shown in FIG. Figure 2As shown, the air tightness of the valve core 32 and the plugging cap 33 is ensured; a limit stop 328 is provided between the upper section 321 and the middle section 322 of the valve core, and a groove 329 is provided on the lower end surface of the limit stop 328, and a sealing ring is provided in the groove 329, which can be stuck on the annular protrusion 319 at the upper end of the fourth air channel 318 of the valve mounting seat 31 to ensure the air tightness of the connection; the diameter of the middle section 322 of the valve core is smaller than the fourth air channel 318 of the valve mounting seat 31; the diameter of the lower section 323 of the valve core matches the diameter of the fourth air channel 318 of the valve mounting seat 31, and the lower section 323 of the valve core is circumferentially provided with two grooves 3210, and a sealing ring 8 is provided in the groove 3210, as shown Figure 8 As shown, the air tightness of the valve core 32 and the fourth air channel 318 is ensured; a groove 3211 is provided at the end of the lower section 323 of the valve core, and a hole matching the groove is provided in the middle of the second spring seat 35. The second spring seat 35 can clamp the lower end of the valve core 32 on the lower side of the second spring seat 35 while pressing the pressure reducing valve spring 34; the exhaust pipe nozzle 37 is provided below the second spring seat 35; the valve base 36 is fixedly connected to the bottom of the housing 1 by a countersunk screw and abuts against the second spring seat 35, and a sealing gasket 7 is provided between the valve base 36 and the housing 1 to ensure air tightness.
[0060] When the induced air pushes open the spherical valve core 23 through the first air channel 225 and the second air channel 226 of the one-way valve 2, it passes through the third air hole 2211, the first air hole 217 and the second air hole 219 in sequence, and enters the gap between the one-way valve 2 and the shell 1, and then passes through the first connecting air channel 14 to enter the gap between the shell 1 and the upper section 121 of the pressure reducing valve installation chamber. 1) When the air flow pressure does not exceed the set pressure, the air flow passes through the fourth air hole 3110, the third air channel 317, the fourth air channel 318, and the fifth air hole 3111 of the upper section 311 of the valve mounting seat in sequence to enter the gap between the pressure reducing valve 3 and the shell 1, and then passes through the second connecting air channel 15 to enter the outlet air channel 13 of the shell 1, and flows out after being filtered by the air filter element 4; 2) When the air flow pressure exceeds the set pressure, the air flow passes through the fourth air hole 311 of the upper section 311 of the valve mounting seat in sequence. 0. The eighth air hole 325 of the upper section 321 of the valve core enters into the fifth air channel 324 inside the valve core 32 and the gap between the valve core 32 and the plugging cap 33, pushing the valve core 32 to move downward and against the annular protrusion 319 at the upper end of the fourth air channel 318. On the one hand, the air flow channel inside the valve core is reduced, reducing the gas flow rate. On the other hand, the air flow passes through the ninth air hole 326 and the fifth air hole 3111 of the valve core from the fifth air channel 324 in turn and enters into the gap between the pressure reducing valve 3 and the housing 1, and then passes through the sixth air hole 3113 and the seventh air hole 3114 of the spring installation cavity 3112 and enters into the exhaust pipe nozzle 37, expelling part of the gas, thereby achieving the pressure reducing effect. After the pressure reducing, under the action of the pressure reducing valve spring 34, the valve core 32 is reset upward, and the gas meeting the pressure requirement flows into the outlet air channel 13 again and flows out after being filtered by the air filter element 4.
[0061] In this embodiment, the housing 1 is of an integrated type, and the mounting cavities, air holes, and air passages inside the housing are all formed by machining.
[0062] In this embodiment, the inlet nozzle 221, the outlet nozzle 5, and the exhaust nozzle 37 all adopt HB-74° cone angle joint interfaces, which are convenient for connection with pipelines.
[0063] In this embodiment, the one-way valve spring 24 is selected according to the pressure required for the one-way valve spherical valve core 23 to open; the pressure reducing valve spring 34 is selected according to the pressure required for the pressure reducing valve valve core 32 to be pushed open.
[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.
Claims
1. A pressure regulating combination valve for facilitating replacement of an air filter element, characterized in that: It includes a housing, a one-way valve, a pressure reducing valve, an air filter element and an outlet nozzle; A one-way valve installation cavity is provided on the left side of the shell for installing the one-way valve; a pressure reducing valve installation cavity is provided on the lower side of the shell for installing the pressure reducing valve; an outlet air passage coaxial with the one-way valve installation cavity is provided on the right side of the shell; connecting air passages are provided between the one-way valve installation cavity and the pressure reducing valve installation cavity, and between the pressure reducing valve installation cavity and the outlet air passage for forming a gas passage; The one-way valve is sealed and fixed in the one-way valve installation cavity of the housing and is a gas inlet end for connecting to an external high-pressure gas source; The pressure reducing valve is sealed and fixed in the pressure reducing valve installation cavity of the shell, and is a gas pressure reducing exhaust end, and is used to ensure that the gas pressure passing through the combination valve meets the pressure requirements in the cabin; The air filter element is detachably mounted in the outlet air passage of the housing; The outlet nozzle is arranged at the right end of the outlet air passage of the shell, which is the gas outlet end and is used to transport the bleed air into the cabin.
2. According to claim 1, a pressure regulating combination valve for facilitating replacement of an air filter element, characterized in that: The one-way valve installation cavity of the shell is provided with threads on the inner wall, and the one-way valve is installed in the one-way valve installation cavity by threaded sealing; the pressure reducing valve installation cavity of the shell is divided into an upper section and a lower section, the diameter of the upper section is smaller than the diameter of the lower section, the inner wall of the lower section is provided with threads, and the pressure reducing valve is installed in the pressure reducing valve installation cavity by threaded sealing on the inner wall of the lower section; the inner wall of the outlet air duct of the shell is provided with threads, and the end of the air filter element is provided with external threads matching the threads on the inner wall of the outlet air duct, and is installed in the outlet air duct of the shell by threads; the outlet nozzle is fixed to the right end of the shell by a countersunk screw to encapsulate the air filter element in the outlet air duct to form an air filtering function; a sealing gasket is provided between the outlet nozzle and the shell to ensure air tightness.
3. According to claim 1, a pressure regulating combination valve for facilitating replacement of an air filter element, characterized in that: A first connecting air passage coaxial with the one-way valve mounting chamber is provided between the one-way valve mounting chamber and the pressure reducing valve mounting chamber, connecting the one-way valve mounting chamber and the pressure reducing valve mounting chamber; a second connecting air passage is provided between the lower shoulder of the pressure reducing valve mounting chamber and the outlet air passage, connecting the pressure reducing valve mounting chamber and the outlet air passage; a hexagonal mounting portion is provided on the left side of the outer side of the shell, and a safety pin hole is provided at the upper end of the hexagonal mounting portion.
4. According to claim 1, a pressure regulating combination valve for facilitating replacement of an air filter element is characterized in that: The one-way valve comprises a one-way valve mounting base, a one-way valve body, a spherical valve core, a one-way valve spring and a first spring seat; The one-way valve mounting base is open on the left side, and a valve body mounting cavity is provided inside. The inner wall of the valve body mounting cavity is provided with a thread for mounting the one-way valve body; a hexagonal mounting portion is provided on the left side of the one-way valve mounting base, and a safety pin hole is provided at the upper end of the hexagonal mounting portion. A limit stop is provided on the right side of the hexagonal mounting portion, and an external thread matching the internal thread of the one-way valve mounting cavity on the left side of the shell is provided on the right side of the limit stop. The one-way valve mounting base is fixedly connected to the one-way valve mounting cavity on the left side of the shell through the external thread, and a sealing ring is provided at the root of the limit stop to ensure the air tightness of the connection; the diameter of the right section of the one-way valve mounting base is smaller than that of the one-way valve mounting cavity. When the one-way valve mounting base is installed in the one-way valve mounting cavity, a gap between the two forms an air channel; a plurality of first air holes are provided on the side of the right section of the one-way valve mounting base, connecting the valve body mounting cavity and the one-way valve mounting cavity; a fairing is provided on the outer side of the first air hole, and a plurality of second air holes are provided on the fairing, and the size of the second air holes is smaller than that of the first air holes; The one-way valve body is provided with an inlet nozzle on the left side for connecting to an air source; a hexagonal mounting portion is provided on the right side of the outside of the inlet nozzle, a safety pin hole is provided on the upper end of the hexagonal mounting portion, and an external thread matching the internal thread of the valve body mounting cavity of the one-way valve mounting base is provided on the right side of the hexagonal mounting portion, the one-way valve body is fixedly connected to the valve body mounting cavity through the external thread, and a sealing ring is provided between the hexagonal mounting portion and the external thread to ensure the air tightness of the connection; the diameter of the right section of the one-way valve body is smaller than that of the valve body mounting cavity, and when the one-way valve body is installed in the valve body mounting cavity, there is a gap between the two to form an airway; The inside of the one-way valve body is connected, and from left to right there are the first air channel, the second air channel and the valve core installation cavity; the diameter of the first air channel is smaller than the diameter of the second air channel, and the diameter of the second air channel is smaller than the diameter of the valve core installation cavity; an annular protrusion is provided at the right end of the second air channel; one end of the one-way valve spring presses against the spherical valve core, and then presses the spherical valve core against the annular protrusion at the end of the second air channel, and the other end is pressed by the first spring seat to form the opening pressure of the spherical valve core when the one-way valve is working; the first spring seat is fixedly connected to the right bottom end of the valve core installation cavity through a card groove seal; A valve core movable cavity is also provided at the bottom of the left side of the valve core installation cavity. The diameter of the valve core movable cavity is larger than the diameter of the valve core installation cavity, which is used to provide sufficient space for the spherical valve core when it is pushed open by gas; a third air hole is provided on the side of the valve core movable cavity, connecting the valve core installation cavity with the valve body installation cavity.
5. According to claim 1, a pressure regulating combination valve for facilitating replacement of an air filter element, characterized in that: The pressure reducing valve comprises a valve mounting seat, a valve core, a plug cap, a pressure reducing valve spring, a second spring seat, a valve base and an exhaust pipe nozzle; The valve mounting seat is divided into three sections: an upper section, a middle section and a lower section; an outer surface of the lower section of the valve mounting seat is provided with an external thread matching the inner wall thread of the pressure reducing valve mounting chamber of the shell, and the valve mounting seat is installed in the pressure reducing valve mounting chamber through the thread; a limit stop is provided at the bottom of the lower section of the valve mounting seat; the diameters of the upper and middle sections of the valve mounting seat are smaller than the diameter of the upper section of the pressure reducing valve mounting chamber of the shell, and when the valve mounting seat is installed in the pressure reducing valve mounting chamber, there are gaps between the upper section of the valve mounting seat and the upper section of the pressure reducing valve mounting chamber, and between the middle section of the valve mounting seat and the lower section of the pressure reducing valve mounting chamber to form an airway; a limit convex is provided between the upper and middle sections of the valve mounting seat, the diameter of the limit convex matches the diameter of the upper section of the pressure reducing valve mounting chamber, a groove is provided on the limit convex, and a sealing ring is provided in the groove to ensure the air tightness of the connection; The interior of the valve mounting seat is through-connected and used for mounting the valve core; the upper end of the valve mounting seat is provided with a plugging cap for limiting the upper end of the valve core; a sealing ring is provided between the valve mounting seat and the plugging cap to ensure the air tightness of the connection; the interior of the valve mounting seat is divided into a third air channel and a fourth air channel from top to bottom; the diameter of the third air channel is larger than that of the fourth air channel, and an annular protrusion is provided at the upper end of the fourth air channel where it is connected to the third air channel; a fourth air hole is provided on the side of the upper section of the valve mounting seat to connect the third air channel with the upper section of the pressure reducing valve mounting chamber; a fifth air hole is provided on the side of the middle section of the valve mounting seat, The fourth air passage is connected with the lower section of the pressure reducing valve installation chamber; the lower section of the valve installation seat is provided with an annular spring installation chamber around the fourth air passage; a sixth air hole is provided at the top of the upper left end of the spring installation chamber, connecting the spring installation chamber with the lower section of the pressure reducing valve installation chamber; a seventh air hole is provided at the bottom of the lower left end of the spring installation chamber, connecting the spring installation chamber with the fourth air passage; the pressure reducing valve spring is sleeved in the spring installation chamber, and the lower end of the pressure reducing valve spring is provided with the second spring seat, which is used to resist the pressure reducing valve spring, and the pressure of the valve core of the pressure reducing valve valve is ensured to be pushed open by the reaction force of the pressure reducing valve spring; The valve valve core is slidably installed in the third air channel and the fourth air channel of the valve mounting seat; the valve valve core is divided into three sections: an upper section, a middle section and a lower section; an axial fifth air channel is provided in the center of the upper section of the valve valve core, the upper end of the fifth air channel is open, and the lower end extends to the middle section of the valve valve core; an eighth air hole is provided at the upper end of the fifth air channel, connecting the fifth air channel and the third air channel of the valve mounting seat; a ninth air hole is provided at the lower end of the fifth air channel, connecting the fifth air channel and the fourth air channel of the valve mounting seat; the diameter of the upper section of the valve valve core matches the inner diameter of the blocking cap, and a groove is circumferentially provided at the end of the upper section of the valve valve core, and a sealing ring is provided in the groove to ensure the air tightness of the valve valve core and the blocking cap; a limit stop is provided between the upper section and the middle section of the valve valve core, and a groove is provided on the lower end surface of the limit stop, and a sealing ring is provided in the groove, which can be stuck on the valve mounting seat The annular protrusion at the upper end of the fourth air channel of the valve core is used to ensure the air tightness of the connection; the diameter of the middle section of the valve valve core is smaller than the fourth air channel of the valve mounting seat; the diameter of the lower section of the valve valve core matches the diameter of the fourth air channel of the valve mounting seat, and the lower section of the valve valve core is circumferentially provided with a plurality of grooves, and a sealing ring is provided in the groove to ensure the air tightness of the valve valve core and the fourth air channel; a clamping groove is provided at the end of the lower section of the valve valve core, and a clamping hole matching the clamping groove is provided in the middle of the second spring seat, and the second spring seat can clamp the lower end head of the valve valve core on the lower side of the second spring seat while pressing the pressure reducing valve spring; the exhaust pipe nozzle is provided below the second spring seat; the valve base is fixedly connected to the bottom of the shell by a countersunk screw and presses against the second spring seat, and a sealing gasket is provided between the valve base and the shell to ensure air tightness.
6. The pressure regulating combination valve for facilitating replacement of an air filter element according to claim 1, characterized in that: The shell is an integrated body, and the internal mounting cavities, air holes and air passages are all formed by machining.
7. The pressure regulating combination valve for facilitating replacement of an air filter element according to claim 1, characterized in that: The outlet nozzle adopts a HB-74° cone angle joint interface.
8. A pressure regulating combined valve for facilitating replacement of an air filter element according to claim 4, characterized in that: The inlet nozzle adopts an HB-74° cone angle joint interface.