CN211976016U - Pressure regulator - Google Patents

Abstract

The utility model discloses a pressure regulator. The pressure regulator includes: the shell is internally provided with an inner cavity and is provided with an inlet hole and an outlet hole; a first pressure control valve assembly and a second pressure control valve assembly, the first and second pressure control valve assemblies being located in the inner cavity; a separator located in the inner chamber and disposed between the first and second pressure control valve assemblies, the inlet port in selective communication with the outlet port through the first pressure control valve assembly, the separator, and the second pressure control valve assembly. The utility model discloses a pressure regulator has left out a plurality of casings and has divided the part and aim at the step through setting up first pressure control valve subassembly, second pressure control valve subassembly and separator in same casing, has consequently simplified the assembling process of first pressure control valve subassembly, second pressure control valve subassembly and separator, is favorable to sparingly assembling man-hour to can avoid producing alignment error, eliminate the potential leakage risk of pressure regulator.

Description

Pressure regulator

Technical Field

The utility model relates to a fluid regulator technical field particularly, relates to a pressure regulator.

Background

The pressure regulator is a key component of the fuel storage and supply system and controls the flow and pressure during operation of the vehicle: the pressure regulator reduces the pressure of the fuel from the tank pressure to the pressure required by the consumer. The prior art pressure regulators include multiple housing sub-components that require alignment during assembly, but have a potential risk of leakage due to alignment errors and increased assembly effort.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a pressure regulator, the risk greatly reduced that leaks.

According to the utility model discloses pressure regulator includes: a housing having an interior cavity therein, the housing having an inlet aperture, an outlet aperture; a first pressure control valve assembly and a second pressure control valve assembly, the first and second pressure control valve assemblies located in the inner cavity; a separator located in the inner chamber and disposed between the first pressure control valve assembly and the second pressure control valve assembly, the inlet port and the outlet port being in selective communication through the first pressure control valve assembly, the separator, and the second pressure control valve assembly, wherein the first pressure control valve assembly is in selective communication with the inlet port, and the outlet port is in selective communication with the second pressure control valve assembly.

According to the utility model discloses pressure regulator, through setting up first pressure control valve subassembly, second pressure control valve subassembly and separator in same casing, has left out a plurality of casings and has divided the part and aim at the step, has consequently simplified the assembling process of first pressure control valve subassembly, second pressure control valve subassembly and separator, is favorable to saving assembly man-hour to eliminate the potential leakage risk of pressure regulator, avoided producing alignment error.

According to some embodiments of the invention, the first pressure control valve assembly, the separator and the second pressure control valve assembly are arranged in sequence in a direction from the inlet opening to the outlet opening, the separator being fixed in the inner chamber.

According to some embodiments of the invention, the housing comprises: a first valve seat for internal sealing of the first pressure control valve assembly, the inlet port opening in the first valve seat, the first pressure control valve assembly being selectively engageable with or disengageable from the first valve seat to close or open the inlet port.

Specifically, the lumen is a stepped lumen and includes: a first conduit section and a second conduit section for external sealing and guiding of said first pressure control valve assembly, said second conduit section having a diameter greater than a diameter of said first conduit section; a third conduit section for external sealing and guiding of said second pressure control valve assembly, said third conduit section having a diameter greater than a diameter of said second conduit section.

According to some embodiments of the invention, the first pressure control valve assembly comprises: a first control valve body selectively engageable with and disengageable from the first valve seat, and a first spring located in the second conduit section and adapted to exert a spring force on the first control valve body away from the first valve seat.

Further, the first control valve body includes: a first rod adapted for sliding contact fit with the first conduit section; a first piston fixedly connected to the first rod and adapted to be in sliding contact with the second conduit section; a first flow control plug secured to said first stem and adapted for sliding contact engagement with said first conduit section, said first flow control plug having a first sealing surface adapted to seal with said first valve seat.

Still further, a spring support annulus is disposed between the first conduit section and the second conduit section, the first spring being disposed between the first piston and the spring support annulus.

Specifically, the first control valve body has a first inner bore extending through the first rod and the first piston, a first fluid passage is provided between an outer peripheral surface of the first flow control plug and an inner peripheral surface of the first conduit section, and the first rod is provided with a side hole communicating the first fluid passage and the first inner bore to fluidly connect the first conduit section to the second conduit section.

Optionally, a first rod groove is formed in the outer peripheral surface of the first rod, a first rod sealing element is arranged at the first rod groove, and the first rod sealing element is suitable for being attached to the bottom of the first rod groove and the inner peripheral surface of the first conduit section; the outer peripheral surface of the first piston is provided with a first piston groove, a first piston sealing element is arranged at the first piston groove, and the first piston sealing element is suitable for being attached to the groove bottom of the first piston groove and the inner peripheral surface of the second conduit section.

According to the utility model discloses a some embodiments, the second pipe section with be provided with first recess between the third pipe section, the diameter of first recess is greater than the diameter of third pipe section, be provided with first retaining ring in the first recess.

Further, a first conical ring surface is arranged between the first groove and the second pipe section, the diameter of the small-diameter end of the first conical ring surface is equal to that of the second pipe section, the diameter of the large-diameter end of the first conical ring surface is equal to that of the first groove, and the separator is suitable for being in abutting fit with the first conical ring surface.

Specifically, the separator includes: a small diameter section, a large diameter section, and a tapered connection section connecting the small diameter section and the large diameter section, the small diameter section being located in the second conduit section, the tapered connection section being adapted to stop against the first tapered annulus.

Optionally, a separator groove is provided on an outer circumferential surface of the small diameter section, and a separator sealing element is provided at the separator groove and adapted to be attached to a groove bottom of the separator groove and an inner circumferential surface of the second conduit section.

According to some embodiments of the invention, the large diameter section has an outlet end face adapted to stop against the first retainer ring and an inlet end face adapted to stop against the first pressure control valve assembly.

According to some embodiments of the invention, the interior of the separator has a central end bore, the end of the central end bore having a second valve seat for internal sealing of the second pressure control valve assembly, such that the outlet of the first pressure control valve assembly is fluidly coupled to the inlet of the second pressure control valve assembly.

Specifically, the second pressure control valve assembly includes: a second control valve body selectively engageable with or disengageable from the second valve seat, and a second spring located in the third conduit section and adapted to exert a spring force on the second control valve body away from the second valve seat.

Further, the second control valve body includes: a second stem in sliding contact fit with the central end bore and having a second sealing surface adapted to seal with the second valve seat; and the second piston is fixedly connected with the second rod and is in contact sliding fit with the third pipe section, and the second spring is arranged between the first retainer ring and the second piston.

Still further, the second control valve body has a second bore therein extending through the second rod and the second piston such that the center end bore is fluidly connected to the third conduit section.

Specifically, the separator further has a central front hole communicating with the second conduit section, the central front hole is located on a side of the second valve seat facing the first pressure control valve assembly, a separator groove is provided between the central front hole and the central end hole, the central front hole and the separator groove communicate through an eccentric hole, and a rear end face of the second valve seat is located in the separator groove, so that the second inner hole and the separator groove selectively communicate.

Optionally, a second rod groove is formed in the outer peripheral surface of the second rod, a second rod sealing element is arranged at the second rod groove, and the second rod sealing element is suitable for being attached to the bottom of the second rod groove and the inner peripheral surface of the central end hole; a second piston groove is formed in the outer peripheral surface of the second piston, a second piston sealing element is arranged at the second piston groove, and the second piston sealing element is suitable for being attached to the groove bottom of the second piston groove and the inner peripheral surface of the third pipe section.

According to some embodiments of the present invention, one side of the third conduit section facing away from the second conduit section is provided with a second groove, the diameter of the second groove is greater than the diameter of the third conduit section, it is right to be provided with in the second groove a second retaining ring for limiting the second pressure control valve assembly.

Further, a second tapered annular surface is arranged between the second groove and the third conduit section, the small diameter end of the second tapered annular surface is equal to the diameter of the third conduit section, and the large diameter end of the second tapered annular surface is equal to the diameter of the second groove.

According to some embodiments of the invention, the housing is an integral cylindrical housing.

Drawings

FIG. 1 is a schematic diagram of a pressure regulator.

Reference numerals:

pressure regulator 1, housing 2, first pressure control valve assembly 3, second pressure control valve assembly 4, separator 5, lumen 6, inlet bore 7, first valve seat 8, first conduit section 9, second conduit section 10, first spring 11, first conical annulus 12, first groove 13, first retainer 14, third conduit section 15, second spring 16, second conical annulus 17, second groove 18, second retainer 19, outlet bore 20, first flow control plug 21, first sealing surface 22, first stem 23, first stem sealing element 24, first stem groove 25, first piston 26, first piston sealing element 27, first piston groove 28, side bore 29, first inner bore 30, spring support annulus 31, small diameter section 32, separator sealing element 33, separator sealing element groove 34, conical connecting section 35, large diameter section 36, outlet end face 37, central front bore 38, inlet end face 39, and valve seat, Eccentric bore 40, separator groove 41, center end bore 42, second valve seat 43, second stem 44, second sealing surface 45, second stem sealing element 46, second stem groove 47, second piston 48, second piston sealing element 49, second piston groove 50, second internal bore 51, first fluid passage 52.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The pressure regulator 1 according to an embodiment of the present invention is described in detail below with reference to fig. 1.

The pressure regulator 1 may be used to control the flow and pressure of a fluid, which may be a gas or a liquid, to a desired pressure, for example for a fuel storage and supply system, the pressure regulator 1 may reduce the pressure of the fuel from the tank pressure to the pressure required by the consumer. Referring to fig. 1, a pressure regulator 1 according to an embodiment of the present invention may include: the pressure control valve comprises a shell 2, a plurality of pressure control valve assemblies and a second pressure control valve assembly 4, wherein the pressure control valve assemblies are positioned in an inner cavity 6, and a separator 5 is arranged between every two adjacent pressure control valve assemblies.

Specifically, the housing 2 has an inner cavity 6 inside, the housing 2 has an inlet hole 7 and an outlet hole 20, in other words, the inlet hole 7 and the outlet hole 20 are both opened on the wall of the housing 2, and for the single housing 2, the inlet hole 7 and the outlet hole 20 are both communicated with the inner cavity 6.

The inlet port 7 is in selective communication with the outlet port 20 via a plurality of pressure control valve assemblies, the separator 5. In other words, in some cases, the inlet aperture 7 and the outlet aperture 20 may be put into communication; in other cases, the passage between the inlet opening 7 and the outlet opening 20 may be interrupted, in which case the inlet opening 7 and the outlet opening 20 cannot communicate.

In the direction from the inlet opening 7 to the outlet opening 20, the fluid passes through the respective pressure control valve assembly, and the flow rate and pressure thereof are adjusted step by step, i.e. the pressure regulator 1 of the present invention is a multi-stage pressure regulator, and the fluid can adjust the fluctuating inlet opening 7 pressure to a stable outlet opening 20 pressure after passing through the housing 2.

Each pressure control valve subassembly and separator 5 among the prior art all have solitary casing 2, during the assembly, need divide the part butt joint with each casing 2, and the butt joint leads to leaking easily from this, and can assemble the process complicated, and the utility model discloses a pressure regulator 1, through setting up each pressure control valve subassembly and separator 5 in same casing 2, has left out a plurality of casings 2 and has divided the part alignment step, has consequently simplified the assembling process of pressure control valve subassembly and separator 5, is favorable to sparingly assembling man-hour to can avoid producing alignment error, eliminate pressure regulator 1 potential leakage risk.

The plurality of pressure control valve assemblies includes: a first pressure control valve assembly 3 and a second pressure control valve assembly 4, and a separator 5 is disposed between the first pressure control valve assembly 3 and the second pressure control valve assembly 4.

Specifically, when the pressure regulator 1 is a two-stage pressure regulator, the first pressure control valve assembly 3, the second pressure control valve assembly 4 and the separator 5 are all located in the inner cavity 6, the separator 5 is disposed between the first pressure control valve assembly 3 and the second pressure control valve assembly 4, and the inlet hole 7 and the outlet hole 20 are selectively communicated through the first pressure control valve assembly 3, the separator 5 and the second pressure control valve assembly 4.

By providing the first pressure control valve assembly 3, the second pressure control valve assembly 4 and the separator 5 in the same housing, the multiple housing sub-component alignment step is eliminated, thus simplifying the assembly process of the first pressure control valve assembly 3, the second pressure control valve assembly 4 and the separator 5, facilitating saving assembly man-hours, and eliminating the potential risk of leakage of the pressure regulator 1.

The first pressure control valve assembly 3, the separator 5, and the second pressure control valve assembly 4 are arranged in sequence in a direction from the inlet orifice 7 to the outlet orifice 20, the separator 5 is fixed in the inner chamber 6, the first pressure control valve assembly 3 is selectively communicated with the inlet orifice 7, and the outlet orifice 20 is selectively communicated with the second pressure control valve assembly 4.

The housing 2 may include: a first valve seat 8, said first valve seat 8 being used for internal sealing of the first pressure control valve assembly 3, the inlet hole 7 opening onto the first valve seat 8, the first pressure control valve assembly 3 being selectively engageable with or disengageable from the first valve seat 8 to close off or open the inlet hole 7. Specifically, when the first pressure control valve assembly 3 is engaged with the first valve seat 8, the first pressure control valve assembly 3 can block the inlet hole 7, and fluid cannot enter the inner cavity 6 of the housing 2 through the inlet hole 7; when the first pressure control valve assembly 3 is separated from the first valve seat 8, the first pressure control valve assembly 3 is able to open the inlet orifice 7, at which point fluid may enter the internal cavity 6 of the housing 2 through the inlet orifice 7.

In particular, the cavity 6 is a stepped cavity and comprises: a first conduit section 9, a second conduit section 10, a third conduit section 15, wherein the first conduit section 9, the second conduit section 10 are for external sealing and guiding of the first pressure control valve assembly 3, the third conduit section 15 is for external sealing and guiding of the second pressure control valve assembly 4, and the diameter of the second conduit section 10 is greater than the diameter of the first conduit section 9, and the diameter of the third conduit section 15 is greater than the diameter of the second conduit section 10. In other words, the diameter of the inner chamber 6 increases stepwise in the direction from the inlet hole 7 to the outlet hole 20, whereby the pressure of the fluid can be stabilized stepwise while passing through the inner chamber 6.

In the embodiment shown in fig. 1, the coaxial arrangement of first conduit section 9, second conduit section 10 and third conduit section 15 facilitates the manufacturing process of casing 2. Of course, in some embodiments, not shown, the axes of first conduit section 9, second conduit section 10 and third conduit section 15 may also be staggered.

The first pressure control valve assembly 3 may include: a first control valve body selectively engageable with or disengageable from the first valve seat 8, and a first spring 11, the first spring 11 being located in the second conduit section 10, and the first spring 11 being adapted to exert a spring force on the first control valve body away from the first valve seat 8. In the initial stage, when the fluid pressure at the inlet hole 7 is low, the elastic force of the first spring 11 on the first control valve body makes the first control valve body away from the first valve seat 8, at this time, the first control valve body is separated from the first valve seat 8, the fluid can continuously enter the first conduit section 9 through the inlet hole 7, and when the pressure of the inner cavity 6 increases to a certain pressure threshold value, the elastic force of the first spring 11 on the first control valve body is not enough to make the first control valve body away from the first valve seat 8, at this time, the first control valve body is engaged with the first valve seat 8, and the fluid can not enter the first conduit section 9 through the inlet hole 7.

Further, the first control valve body may include: a first rod 23, a first piston 26 and a first flow control plug 21, the first rod 23 being adapted to be in contact sliding engagement with the first conduit section 9, the first piston 26 being fixedly connected to the first rod 23 and the first piston 26 being adapted to be in contact sliding engagement with the second conduit section 10, the first flow control plug 21 being fixed to the first rod 23 and being adapted to be in contact sliding engagement with the first conduit section 9, the first flow control plug 21 having a first sealing surface 22 adapted to seal with the first valve seat 8. The first sealing surface 22 of the first flow control plug 21 may engage or disengage the first valve seat 8.

Optionally, the first piston 26 is integrally formed with the first rod 23.

Further, a spring support annulus 31 is disposed between the first tube section 9 and the second tube section 10, and the first spring 11 is disposed between the first piston 26 and the spring support annulus 31. The first spring 11 is a compression spring, and thus the first spring 11 may apply a spring force to the first piston 26 away from the spring support annulus 31, that is, the first spring 11 may apply a spring force to the first control valve body away from the first valve seat 8.

Specifically, the first control valve body has a first bore 30 extending through first rod 23 and first piston 26 therein, a first fluid passage 52 is provided between the outer peripheral surface of first flow control plug 21 and the inner peripheral surface of first conduit section 9, and first rod 23 is provided with a side bore 29 communicating first fluid passage 52 with first bore 30 to fluidly connect first conduit section 9 to second conduit section 10. When the first control valve body is separated from the first valve seat 8, the inlet hole 7, the first fluid passage 52, the side hole 29 and the first inner hole 30 are communicated, and fluid at the inlet hole 7 can enter the first fluid passage 52 and then reach the first inner hole 30 through the side hole 29; when the first control valve body is engaged with the first valve seat 8, the inlet port 7 cannot communicate with the first fluid passage 52, and at this time, fluid cannot enter the pressure regulator 1.

Optionally, a first rod groove 25 is disposed on the outer circumferential surface of the first rod 23, a first rod sealing element 24 is disposed at the first rod groove 25, and the first rod sealing element 24 is adapted to fit the groove bottom of the first rod groove 25 and the inner circumferential surface of the first conduit section 9, thereby improving the sealing performance between the first rod 23 and the first conduit section 9.

The first piston 26 is provided with a first piston groove 28 on the outer peripheral surface thereof, a first piston sealing element 27 is provided at the first piston groove 28, and the first piston sealing element 27 is adapted to be attached to the bottom of the first piston groove 28 and the inner peripheral surface of the second conduit section 10, thereby improving the sealing performance between the first piston 26 and the second conduit section 10.

A first groove 13 is arranged between the second conduit section 10 and the third conduit section 15, the diameter of the first groove 13 is larger than that of the third conduit section 15, a first retainer ring 14 is arranged in the first groove 13, and the first retainer ring 14 is used for limiting the separator 5.

Further, a first conical ring surface 12 is arranged between the first groove 13 and the second conduit section 10, the diameter of the small-diameter end of the first conical ring surface 12 is equal to that of the second conduit section 10, the diameter of the large-diameter end of the first conical ring surface 12 is equal to that of the first groove 13, the separator 5 is suitable for being in abutting fit with the first conical ring surface 12, and the first conical ring surface 12 can position the separator 5, so that the position of the separator 5 in the inner cavity 6 is accurate.

Specifically, the separator 5 includes: a small diameter section 32, a large diameter section 36 and a tapered connecting section 35 connecting the small diameter section 32 and the large diameter section 36, the small diameter section 32 being located in the second conduit section 10, the tapered connecting section 35 being adapted to stop against the first tapered annular surface 12.

Optionally, a separator groove 34 is provided on the outer peripheral surface of the small-diameter section 32, a separator sealing element 33 is provided at the separator groove 34, and the separator sealing element 33 is adapted to be in contact with the groove bottom of the separator groove 34 and the inner peripheral surface of the second conduit section 10, thereby improving the sealing performance between the small-diameter section 32 of the separator 5 and the second conduit section 10.

The large diameter section 36 has an outlet end face 37 adapted to stop against the first retainer ring 14 and an inlet end face 39 adapted to stop against the first pressure control valve assembly 3. The large diameter section 36 abuts against the first collar 14 and the conical connecting section 35 abuts against the first conical ring surface 12, whereby the separator 5 is fixed in the inner chamber 6 without play.

The interior of the separator 5 has a central end bore 42, the end of the central end bore 42 having a second valve seat 43 for internal sealing of the second pressure control valve assembly 4, such that the outlet of the first pressure control valve assembly 3 is fluidly coupled to the inlet of the second pressure control valve assembly 4.

Specifically, the second pressure control valve assembly 4 may include: a second control valve body selectively engageable with and disengageable from second seat 43, and a second spring 16 located in third conduit section 15 and adapted to exert a spring force on the second control valve body away from second seat 43. When the fluid pressure in lumen 6 is low, the spring force of second spring 16 against the second control valve body causes the second control valve body to move away from second seat 43, at which point the second control valve body disengages from second seat 43 and fluid continues to flow through second conduit section 10 into third conduit section 15, and when the pressure in lumen 6 increases to a certain pressure threshold, the spring force of second spring 16 against the second control valve body is insufficient to move the second control valve body away from second seat 43, at which point the second control valve body engages with second seat 43 and fluid cannot flow through second conduit section 10 into third conduit section 15.

Further, the second control valve body may include: a second stem 44, a second piston 48, the second stem 44 being in sliding contact with the central end bore 42 and having a second sealing surface 45 adapted to seal with the second valve seat 43, the second piston 48 being fixedly connected to the second stem 44 and the second piston 48 being in sliding contact with the third conduit section 15, the second spring 16 being arranged between the first retainer 14 and the second piston 48.

The second spring 16 is a compression spring, and therefore, the second spring 16 can apply an elastic force to the second piston 48 away from the first retainer ring 14, that is, the second spring 16 can apply an elastic force to the second control valve body away from the second valve seat 43.

Optionally, the second piston 48 is integrally formed with the second rod 44.

Further, the second control valve body has a second bore 51 therein extending through the second stem 44 and the second piston 48 such that the central end bore 42 is fluidly connected to the third conduit section 15.

Specifically, the interior of the separator 5 also has a center front hole 38 communicating with the second pipe section 10, the center front hole 38 is located on the side of the second valve seat 43 facing the first pressure control valve assembly 3, and a separator groove 41 is provided between the center front hole 38 and the center end hole 42, the center front hole 38 and the separator groove 41 communicate through the eccentric hole 40, and the rear end surface of the second valve seat 43 is located in the separator groove 41, so that the second inner hole 51 and the separator groove 41 selectively communicate.

When the second control valve body is separated from the second valve seat 43, the first inner hole 30, the central front hole 38, the eccentric hole 40, the separator groove 41, the second inner hole 51 and the outlet hole 20 are communicated, and fluid in the first inner hole 30 can enter the central front hole 38, then reach the separator groove 41 through the eccentric hole 40, then enter the second inner hole 51 and finally flow out of the outlet hole 20; when the second control valve body is coupled to the second valve seat 43, the central front hole 38 cannot communicate with the second bore 51, and fluid at the central front hole 38 cannot enter the second bore 51.

Optionally, a second rod groove 47 is provided on the outer circumferential surface of the second rod 44, a second rod sealing element 46 is provided at the second rod groove 47, and the second rod sealing element 46 is adapted to fit the groove bottom of the second rod groove 47 and the inner circumferential surface of the central end hole 42, thereby improving the sealing performance between the second rod 44 and the central end hole 42.

A second piston groove 50 is formed in the outer circumferential surface of the second piston 48, a second piston sealing element 49 is disposed in the second piston groove 50, and the second piston sealing element 49 is adapted to be attached to the bottom of the second piston groove 50 and the inner circumferential surface of the third pipe segment 15, so as to improve the sealing performance between the second piston 48 and the third pipe segment 15.

The side of third conduit section 15 facing away from second conduit section 10 is provided with a second groove 18, the diameter of second groove 18 being greater than the diameter of third conduit section 15, and a second collar 19 for retaining second pressure control valve assembly 4 is provided in second groove 18.

Further, a second tapered annular surface 17 is provided between the second groove 18 and the third conduit section 15, the small diameter end of the second tapered annular surface 17 has the same diameter as the third conduit section 15, and the large diameter end of the second tapered annular surface 17 has the same diameter as the second groove 18. The installation of the second pressure control valve assembly 4 in the internal chamber 6 is facilitated by the provision of the second tapered annular surface 17.

Optionally, the housing 2 is a one-piece cylindrical housing and has a central stepped internal cavity 6 to accommodate all of the moving parts of the respective pressure control valve assembly and to accommodate the separator 5 which is positioned by a retaining ring or snap ring. The pressure regulator 1 has only one housing 2, which is beneficial to reducing the number of parts and eliminating the assembly step of butting a plurality of housings 2.

The use of the pressure regulator 1 of the present invention is described below.

At the initial stage, the fluid pressure at the inlet port 7 is small, the elastic force of the first spring 11 against the first control valve body causes the first control valve body to move away from the first valve seat 8, the elastic force of the second spring 16 against the second control valve body causes the second control valve body to move away from the second valve seat 43, and at this time, the first control valve body, which can stop against the inlet end face 39 of the separator 5, is separated from the first valve seat 8, the second control valve body, which can stop against the second valve seat 43, the second stop ring 19, fluid can continuously enter the first fluid passage 52 of the first conduit section 9 through the inlet opening 7, the fluid in the first fluid passage 52 passes through the side opening 29 to the first bore 30, and the fluid in the first bore 30 can enter the central front opening 38, pass through the eccentric opening 40 to the separator recess 41, then enter the second bore 51, and finally exit the outlet opening 20.

When the pressure in the inner chamber 6 increases to a certain pressure threshold, the first spring 11 is not sufficiently resilient against the first control valve body to move the first control valve body away from the first valve seat 8, at which point the first control valve body engages the first valve seat 8 and fluid cannot enter the first conduit section 9 through the inlet opening 7. The force of second spring 16 against the second control valve body is insufficient to move the second control valve body away from second seat 43, at which point the second control valve body engages second seat 43 and fluid cannot pass through second conduit section 10 into third conduit section 15.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (23)

1. A pressure regulator, comprising:

a housing (2), an inner cavity (6) is arranged inside the housing (2), and the housing (2) is provided with an inlet hole (7) and an outlet hole (20);

a first pressure control valve assembly (3) and a second pressure control valve assembly (4), the first pressure control valve assembly (3) and the second pressure control valve assembly (4) being located in the inner cavity (6);

a separator (5), the separator (5) being located in the inner cavity (6) and disposed between the first pressure control valve assembly (3) and the second pressure control valve assembly (4), the inlet port (7) and the outlet port (20) being selectively communicable through the first pressure control valve assembly (3), the separator (5) and the second pressure control valve assembly (4), wherein the inlet port (7) is selectively communicable with the first pressure control valve assembly (3), and the outlet port (20) is selectively communicable with the second pressure control valve assembly (4).

2. The pressure regulator according to claim 1, characterized in that the first pressure control valve assembly (3), the separator (5) and the second pressure control valve assembly (4) are arranged in sequence in the direction from the inlet orifice (7) to the outlet orifice (20), the separator (5) being fixed in the inner chamber (6).

3. The pressure regulator according to claim 1 or 2, characterized in that the casing (2) comprises: a first valve seat (8) for internal sealing of the first pressure control valve assembly (3), the inlet orifice (7) opening onto the first valve seat (8), the first pressure control valve assembly (3) being selectively engageable with or disengageable from the first valve seat (8) to close or open the inlet orifice (7).

4. The pressure regulator according to claim 3, characterized in that the inner cavity (6) is a stepped inner cavity and comprises:

-a first conduit section (9) and a second conduit section (10) for external sealing and guiding of said first pressure control valve assembly (3), said second conduit section (10) having a diameter greater than the diameter of said first conduit section (9);

-a third conduit section (15) for external sealing and guiding of said second pressure control valve assembly (4), said third conduit section (15) having a diameter greater than the diameter of said second conduit section (10).

5. The pressure regulator according to claim 4, characterized in that the first pressure control valve assembly (3) comprises: a first control valve body selectively engageable with or disengageable from said first valve seat (8), and a first spring (11), said first spring (11) being located in said second conduit section (10) and being adapted to exert a spring force on said first control valve body away from said first valve seat (8).

6. The pressure regulator of claim 5, wherein the first control valve body comprises:

a first rod (23), said first rod (23) being adapted to be in contact sliding fit with said first conduit section (9);

a first piston (26), said first piston (26) being fixedly connected to said first rod (23), and said first piston (26) being adapted to be in sliding contact with said second conduit section (10);

a first flow control plug (21), said first flow control plug (21) being fixed to said first stem (23) and being adapted to be in sliding engagement in contact with said first conduit section (9), said first flow control plug (21) having a first sealing surface (22) adapted to seal with said first valve seat (8).

7. The regulator according to claim 6, characterised in that a spring support annulus (31) is provided between the first conduit section (9) and the second conduit section (10), the first spring (11) being provided between the first piston (26) and the spring support annulus (31).

8. The pressure regulator according to claim 6, characterized in that the first control valve body has a first internal bore (30) passing through the first rod (23) and the first piston (26), a first fluid passage (52) being provided between the outer peripheral surface of the first flow control plug (21) and the inner peripheral surface of the first conduit section (9), a side bore (29) being provided on the first rod (23) communicating the first fluid passage (52) with the first internal bore (30) for fluidly connecting the first conduit section (9) to the second conduit section (10).

9. The regulator according to claim 6, characterised in that a first rod groove (25) is provided on the outer peripheral surface of the first rod (23), a first rod sealing element (24) being provided at the first rod groove (25), the first rod sealing element (24) being adapted to abut against the bottom of the first rod groove (25), the inner peripheral surface of the first conduit section (9);

a first piston groove (28) is arranged on the outer peripheral surface of the first piston (26), a first piston sealing element (27) is arranged at the first piston groove (28), and the first piston sealing element (27) is suitable for being attached to the groove bottom of the first piston groove (28) and the inner peripheral surface of the second conduit section (10).

10. The regulator according to claim 4, characterised in that a first groove (13) is provided between the second conduit section (10) and the third conduit section (15), the first groove (13) having a diameter greater than the diameter of the third conduit section (15), a first collar (14) being provided in the first groove (13).

11. The regulator according to claim 10, characterised in that a first conical annular surface (12) is provided between the first groove (13) and the second conduit section (10), the small diameter end of the first conical annular surface (12) having a diameter equal to the diameter of the second conduit section (10), the large diameter end of the first conical annular surface (12) having a diameter equal to the diameter of the first groove (13), the separator (5) being suitable for an interference fit with the first conical annular surface (12).

12. The pressure regulator according to claim 11, characterized in that the separator (5) comprises: a small diameter section (32), a large diameter section (36) and a tapered connecting section (35) connecting the small diameter section (32) and the large diameter section (36), the small diameter section (32) being located in the second conduit section (10), the tapered connecting section (35) being adapted to stop against the first tapered annulus (12).

13. The pressure regulator according to claim 12, characterized in that a separator groove (34) is provided on the outer peripheral surface of the small diameter section (32), a separator sealing element (33) being provided at the separator groove (34), the separator sealing element (33) being adapted to abut the groove bottom of the separator groove (34), the inner peripheral surface of the second conduit section (10).

14. The pressure regulator according to claim 12, characterized in that the large diameter section (36) has an outlet end face (37) adapted to stop against the first check ring (14) and an inlet end face (39) adapted to stop against the first pressure control valve assembly (3).

15. The pressure regulator according to claim 10, characterized in that the interior of the separator (5) has a central end hole (42), the end of the central end hole (42) having a second valve seat (43) for internal sealing of the second pressure control valve assembly (4) so that the outlet of the first pressure control valve assembly (3) is fluidly coupled to the inlet of the second pressure control valve assembly (4).

16. The pressure regulator according to claim 15, characterized in that the second pressure control valve assembly (4) comprises: a second control valve body selectively engageable with or disengageable from said second valve seat (43), and a second spring (16) located in said third conduit section (15) and adapted to exert a spring force on said second control valve body away from said second valve seat (43).

17. The pressure regulator of claim 16, wherein the second control valve body comprises:

a second stem (44), said second stem (44) being in sliding fit in contact with said central end hole (42) and having a second sealing surface (45) adapted to seal with said second valve seat (43);

a second piston (48), said second piston (48) being fixedly connected to said second rod (44), and said second piston (48) being in sliding contact with said third conduit section (15), said second spring (16) being disposed between said first retainer (14) and said second piston (48).

18. The pressure regulator according to claim 17, wherein the second control valve body has a second bore (51) therein through the second stem (44) and the second piston (48) to fluidly connect the central end bore (42) to the third conduit section (15).

19. The pressure regulator according to claim 18, characterized in that the interior of the separator (5) further has a central front bore (38) communicating with the second conduit section (10), the central front bore (38) being located on the side of the second valve seat (43) facing the first pressure control valve assembly (3), and a separator groove (41) being provided between the central front bore (38) and the central end bore (42), the central front bore (38) communicating with the separator groove (41) through an eccentric bore (40), the rear end face of the second valve seat (43) being located in the separator groove (41) so as to selectively communicate the second inner bore (51) with the separator groove (41).

20. The pressure regulator according to claim 17, wherein a second rod groove (47) is provided on an outer circumferential surface of the second rod (44), a second rod sealing element (46) is provided at the second rod groove (47), and the second rod sealing element (46) is adapted to be in abutment with a groove bottom of the second rod groove (47) and an inner circumferential surface of the center end hole (42);

a second piston groove (50) is formed in the outer peripheral surface of the second piston (48), a second piston sealing element (49) is arranged in the second piston groove (50), and the second piston sealing element (49) is suitable for being attached to the groove bottom of the second piston groove (50) and the inner peripheral surface of the third pipe section (15).

21. The pressure regulator according to claim 4, characterized in that the side of the third conduit section (15) facing away from the second conduit section (10) is provided with a second groove (18), the diameter of the second groove (18) being larger than the diameter of the third conduit section (15), a second collar (19) being provided in the second groove (18) for limiting the second pressure control valve assembly (4).

22. The pressure regulator according to claim 21, characterized in that a second conical ring surface (17) is provided between the second groove (18) and the third conduit section (15), the small diameter end diameter of the second conical ring surface (17) being equal to the diameter of the third conduit section (15), the large diameter end diameter of the second conical ring surface (17) being equal to the diameter of the second groove (18).

23. The pressure regulator according to claim 1, characterized in that the housing (2) is a one-piece cylindrical housing.

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