Pressure Regulator

Abstract

The present invention discloses a pressure regulator. The pressure regulator comprises: a shell, the shell has an inner cavity, the shell has 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 are located in the inner cavity; a separator, the separator is located in the inner cavity and is arranged between the first and second pressure control valve assemblies, and the inlet hole and the outlet hole are selectively connected through the first pressure control valve assembly, the separator and the second pressure control valve assembly. The pressure regulator of the present invention omits the alignment steps of multiple shell sub-components by arranging the first pressure control valve assembly, the second pressure control valve assembly and the separator in the same shell, thereby simplifying the assembly process of the first pressure control valve assembly, the second pressure control valve assembly and the separator, which is conducive to saving assembly time, and can avoid alignment errors and eliminate potential leakage risks of the pressure regulator.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid regulators, and in particular to a pressure regulator. Background Art

[0002] The pressure regulator is a key component of the fuel storage and supply system and controls the flow and pressure during the operation of the vehicle: the pressure regulator reduces the pressure of the fuel from the fuel tank pressure to the pressure required by the consumer. The pressure regulator in the prior art includes multiple housing sub-components, which need to be aligned during assembly. However, due to the alignment error, the pressure regulator has a potential risk of leakage and increases the assembly work. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present invention proposes a pressure regulator with a greatly reduced risk of leakage.

[0004] A pressure regulator according to an embodiment of the present invention includes: a shell having an inner cavity therein, the shell having an inlet hole and an outlet hole; a first pressure control valve assembly and a second pressure control valve assembly, the first pressure control valve assembly and the second pressure control valve assembly being located in the inner cavity; a separator, the separator being located in the inner cavity and arranged between the first pressure control valve assembly and the second pressure control valve assembly, the inlet hole and the outlet hole being selectively connected via the first pressure control valve assembly, the separator and the second pressure control valve assembly, wherein the first pressure control valve assembly is selectively connected to the inlet hole, and the outlet hole is selectively connected to the second pressure control valve assembly.

[0005] According to the pressure regulator of the embodiment of the present invention, by arranging the first pressure control valve assembly, the second pressure control valve assembly and the separator in the same housing, multiple housing component alignment steps are omitted, thereby simplifying the assembly process of the first pressure control valve assembly, the second pressure control valve assembly and the separator, which is beneficial to saving assembly man-hours, eliminating the potential leakage risk of the pressure regulator, and avoiding the occurrence of alignment errors.

[0006] According to some embodiments of the present invention, in a direction from the inlet hole to the outlet hole, the first pressure control valve assembly, the separator and the second pressure control valve assembly are arranged sequentially, and the separator is fixed in the inner cavity.

[0007] According to some embodiments of the present invention, the shell includes: a first valve seat for internal sealing of the first pressure control valve assembly, the inlet hole is opened on the first valve seat, and the first pressure control valve assembly and the first valve seat can be selectively engaged or separated to block or open the inlet hole.

[0008] Specifically, the inner cavity is a stepped inner cavity and includes: a first conduit segment and a second conduit segment, which are used for external sealing and guiding of the first pressure control valve assembly, and the diameter of the second conduit segment is larger than the diameter of the first conduit segment; a third conduit segment, which is used for external sealing and guiding of the second pressure control valve assembly, and the diameter of the third conduit segment is larger than the diameter of the second conduit segment.

[0009] According to some embodiments of the present invention, the first pressure control valve assembly includes: a first control valve body and a first spring, the first control valve body can be selectively engaged or disengaged from the first valve seat, the first spring is located in the second conduit section and is suitable for applying an elastic force to the first control valve body away from the first valve seat.

[0010] Further, the first control valve body includes: a first rod, the first rod is suitable for contacting and sliding with the first conduit section; a first piston, the first piston is fixedly connected to the first rod, and the first piston is suitable for contacting and sliding with the second conduit section; a first flow control plug, the first flow control plug is fixed to the first rod and is suitable for contacting and sliding with the first conduit section, and the first flow control plug has a first sealing surface suitable for sealing with the first valve seat.

[0011] Furthermore, a spring supporting annular surface is provided between the first conduit section and the second conduit section, and the first spring is provided between the first piston and the spring supporting annular surface.

[0012] Specifically, the first control valve body has a first inner hole that penetrates the first rod and the first piston, a first fluid channel is provided between the outer circumferential surface of the first flow control plug and the inner circumferential surface of the first conduit segment, and the first rod is provided with a side hole that connects the first fluid channel and the first inner hole, so that the first conduit segment is fluidically connected to the second conduit segment.

[0013] Optionally, a first rod groove is provided on the outer circumferential surface of the first rod, and a first rod sealing element is provided at the first rod groove, and the first rod sealing element is suitable for fitting with the bottom of the first rod groove and the inner circumferential surface of the first conduit section; a first piston groove is provided on the outer circumferential surface of the first piston, and a first piston sealing element is provided at the first piston groove, and the first piston sealing element is suitable for fitting with the bottom of the first piston groove and the inner circumferential surface of the second conduit section.

[0014] According to some embodiments of the present invention, a first groove is provided between the second conduit segment and the third conduit segment, the diameter of the first groove is greater than the diameter of the third conduit segment, and a first retaining ring is provided in the first groove.

[0015] Furthermore, a first conical annular surface is arranged between the first groove and the second conduit section, the diameter of the small diameter end of the first conical annular surface is equal to the diameter of the second conduit section, the diameter of the large diameter end of the first conical annular surface is equal to the diameter of the first groove, and the separator is suitable for abutting against the first conical annular surface.

[0016] Specifically, the separator comprises: a small diameter section, a large diameter section and a conical connecting section connecting the small diameter section and the large diameter section, the small diameter section is located in the second conduit section, and the conical connecting section is suitable for abutting against the first conical annular surface.

[0017] Optionally, a separator groove is provided on the outer circumferential surface of the small diameter section, and a separator sealing element is provided at the separator groove, and the separator sealing element is suitable for fitting with the groove bottom of the separator groove and the inner circumferential surface of the second conduit section.

[0018] According to some embodiments of the present invention, the large diameter section has an outlet end surface suitable for abutting against the first retaining ring and an inlet end surface suitable for abutting against the first pressure control valve assembly.

[0019] According to some embodiments of the present invention, the separator has a central end hole inside, and the end of the central end hole has a second valve seat for internal sealing of the second pressure control valve assembly so that the outlet of the first pressure control valve assembly is fluidly connected to the inlet of the second pressure control valve assembly.

[0020] Specifically, the second pressure control valve assembly includes: a second control valve body and a second spring, the second control valve body can be selectively engaged or separated from the second valve seat, the second spring is located in the third conduit section and is suitable for applying an elastic force to the second control valve body away from the second valve seat.

[0021] Furthermore, the second control valve body includes: a second rod, which is in sliding contact with the central end hole and has a second sealing surface suitable for sealing with the second valve seat; a second piston, which is fixedly connected to the second rod and in sliding contact with the third conduit section, and the second spring is arranged between the first retaining ring and the second piston.

[0022] Furthermore, the second control valve body has a second inner hole penetrating the second rod and the second piston, so that the central end hole is fluidly connected to the third conduit section.

[0023] Specifically, the interior of the separator also has a central front hole connected to the second conduit section, the central front hole is located on the side of the second valve seat facing the first pressure control valve assembly, and a separator groove is provided between the central front hole and the central end hole, the central front hole and the separator groove are connected through an eccentric hole, and the rear end face of the second valve seat is located in the separator groove so that the second inner hole and the separator groove can be selectively connected.

[0024] Optionally, a second rod groove is provided on the outer circumferential surface of the second rod, and a second rod sealing element is provided at the second rod groove, and the second rod sealing element is suitable for fitting with the bottom of the second rod groove and the inner circumferential surface of the center end hole; a second piston groove is provided on the outer circumferential surface of the second piston, and a second piston sealing element is provided at the second piston groove, and the second piston sealing element is suitable for fitting with the bottom of the second piston groove and the inner circumferential surface of the third conduit section.

[0025] According to some embodiments of the present invention, a second groove is provided on the side of the third conduit segment facing away from the second conduit segment, the diameter of the second groove is larger than the diameter of the third conduit segment, and a second retaining ring for limiting the second pressure control valve assembly is provided in the second groove.

[0026] Furthermore, a second conical annular surface is provided between the second groove and the third conduit section, the diameter of the small diameter end of the second conical annular surface is equal to the diameter of the third conduit section, and the diameter of the large diameter end of the second conical annular surface is equal to the diameter of the second groove.

[0027] According to some embodiments of the present invention, the housing is an integral cylindrical housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a pressure regulator.

[0029] Reference numerals:

[0030] Pressure regulator 1, housing 2, first pressure control valve assembly 3, second pressure control valve assembly 4, separator 5, inner cavity 6, inlet hole 7, first valve seat 8, first conduit section 9, second conduit section 10, first spring 11, first conical annulus 12, first groove 13, first retaining ring 14, third conduit section 15, second spring 16, second conical annulus 17, second groove 18, second retaining ring 19, outlet hole 20, first flow control plug 21, first sealing surface 22, first rod 23, first rod sealing element 24, first rod groove 25, first piston 26, first piston Sealing element 27, first piston groove 28, side hole 29, first inner hole 30, spring support annular surface 31, small diameter section 32, separator sealing element 33, separator groove 34, tapered connecting section 35, large diameter section 36, outlet end face 37, center front hole 38, inlet end face 39, eccentric hole 40, separator groove 41, center end hole 42, second valve seat 43, second rod 44, second sealing surface 45, second rod sealing element 46, second rod groove 47, second piston 48, second piston sealing element 49, second piston groove 50, second inner hole 51, first fluid channel 52. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Combine the following Figure 1 The pressure regulator 1 according to the embodiment of the present invention will be described in detail.

[0036] The pressure regulator 1 can be used to control the flow rate and pressure of a fluid and adjust it to a required pressure. The fluid can be gas or liquid. For example, for a fuel storage and supply system, the pressure regulator 1 can reduce the pressure of the fuel from the fuel tank pressure to the pressure required by the consumer. Figure 1 As shown, the pressure regulator 1 according to an embodiment of the present invention may include: a housing 2, a plurality of pressure control valve assemblies, a second pressure control valve assembly 4, the plurality of pressure control valve assemblies are located in an inner cavity 6, and a separator 5 is provided between two adjacent pressure control valve assemblies.

[0037] Specifically, the shell 2 has an inner cavity 6, and the shell 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 shell wall of the shell 2, and for a single shell 2, the inlet hole 7 and the outlet hole 20 are both connected to the inner cavity 6.

[0038] The inlet hole 7 and the outlet hole 20 are selectively connected through a plurality of pressure control valve assemblies and the separator 5. In other words, in some cases, the inlet hole 7 and the outlet hole 20 can be connected; in other cases, the passage between the inlet hole 7 and the outlet hole 20 will be cut off, and in this case, the inlet hole 7 and the outlet hole 20 cannot be connected.

[0039] In the direction from the inlet hole 7 to the outlet hole 20, the fluid passes through each pressure control valve assembly, and its flow rate and pressure are adjusted step by step. That is to say, the pressure regulator 1 in the present invention is a multi-stage pressure regulator. After the fluid passes through the shell 2, the fluctuating inlet hole 7 pressure can be adjusted to a stable outlet hole 20 pressure.

[0040] In the prior art, each pressure control valve assembly and separator 5 has a separate housing 2. During assembly, each housing 2 component needs to be docked, which can easily lead to leakage at the docking point and complicate the assembly process. The pressure regulator 1 of the embodiment of the present invention, by arranging each pressure control valve assembly and separator 5 in the same housing 2, omits the alignment steps of multiple housing 2 components, thereby simplifying the assembly process of the pressure control valve assembly and the separator 5, which is beneficial to saving assembly time, avoiding alignment errors, and eliminating the potential leakage risk of the pressure regulator 1.

[0041] The plurality of pressure control valve assemblies include: 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 .

[0042] Specifically, at this time, 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, and the separator 5 is arranged 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 connected through the first pressure control valve assembly 3, the separator 5 and the second pressure control valve assembly 4.

[0043] By arranging the first pressure control valve assembly 3, the second pressure control valve assembly 4 and the separator 5 in the same housing, a plurality of housing component alignment steps are omitted, thereby simplifying the assembly process of the first pressure control valve assembly 3, the second pressure control valve assembly 4 and the separator 5, which is beneficial to saving assembly time and eliminating the potential leakage risk of the pressure regulator 1.

[0044] In the direction from the inlet hole 7 to the outlet hole 20, the first pressure control valve assembly 3, the separator 5 and the second pressure control valve assembly 4 are arranged in sequence, the separator 5 is fixed in the inner cavity 6, the first pressure control valve assembly 3 is selectively connected to the inlet hole 7, and the outlet hole 20 is selectively connected to the second pressure control valve assembly 4.

[0045] The housing 2 may include: a first valve seat 8, the first valve seat 8 is used for internal sealing of the first pressure control valve assembly 3, the inlet hole 7 is provided on the first valve seat 8, and the first pressure control valve assembly 3 and the first valve seat 8 can be selectively engaged or separated to block 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 the 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 can open the inlet hole 7, and the fluid can enter the inner cavity 6 of the housing 2 through the inlet hole 7.

[0046] Specifically, the inner cavity 6 is a stepped inner cavity and includes: a first conduit segment 9, a second conduit segment 10, and a third conduit segment 15, wherein the first conduit segment 9 and the second conduit segment 10 are used for external sealing and guiding of the first pressure control valve assembly 3, and the third conduit segment 15 is used for external sealing and guiding of the second pressure control valve assembly 4, and the diameter of the second conduit segment 10 is larger than the diameter of the first conduit segment 9, and the diameter of the third conduit segment 15 is larger than the diameter of the second conduit segment 10. In other words, in the direction from the inlet hole 7 to the outlet hole 20, the diameter of the inner cavity 6 increases step by step, thereby, when the fluid passes through the inner cavity 6, the pressure can be stabilized step by step.

[0047] exist Figure 1 In the illustrated embodiment, the first conduit segment 9, the second conduit segment 10, and the third conduit segment 15 are coaxially arranged, which is conducive to simplifying the manufacturing process of the housing 2. Of course, in some embodiments not shown, the axes of the first conduit segment 9, the second conduit segment 10, and the third conduit segment 15 may also be staggered.

[0048] The first pressure control valve assembly 3 may include: a first control valve body and a first spring 11, the first control valve body and the first valve seat 8 may be selectively engaged or separated, the first spring 11 is located in the second conduit section 10, and the first spring 11 is suitable for applying an elastic force to 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 relatively low, the elastic force of the first spring 11 on the first control valve body causes the first control valve body to be away from the first valve seat 8. At this time, the first control valve body is separated from the first valve seat 8, and the fluid can continuously enter the first conduit section 9 through the inlet hole 7. When the pressure of the inner cavity 6 increases to a certain pressure threshold, the elastic force of the first spring 11 on the first control valve body is insufficient to cause the first control valve body to be 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 cannot enter the first conduit section 9 through the inlet hole 7.

[0049] 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 is suitable for contacting and sliding with the first conduit section 9, the first piston 26 is fixedly connected to the first rod 23, and the first piston 26 is suitable for contacting and sliding with the second conduit section 10, the first flow control plug 21 is fixed to the first rod 23 and is suitable for contacting and sliding with the first conduit section 9, and the first flow control plug 21 has a first sealing surface 22 suitable for sealing with the first valve seat 8. The first sealing surface 22 of the first flow control plug 21 can be engaged with or separated from the first valve seat 8.

[0050] Optionally, the first piston 26 and the first rod 23 are formed integrally.

[0051] Furthermore, a spring support annular surface 31 is provided between the first conduit section 9 and the second conduit section 10, and the first spring 11 is provided between the first piston 26 and the spring support annular surface 31. The first spring 11 is a compression spring, and therefore, the first spring 11 can exert an elastic force on the first piston 26 away from the spring support annular surface 31, that is, the first spring 11 can exert an elastic force on the first control valve body away from the first valve seat 8.

[0052] Specifically, the first control valve body has a first inner hole 30 penetrating the first rod 23 and the first piston 26, a first fluid channel 52 is provided between the outer circumference of the first flow control plug 21 and the inner circumference of the first conduit section 9, and a side hole 29 connecting the first fluid channel 52 and the first inner hole 30 is provided on the first rod 23, so that the first conduit section 9 is fluidically connected to the 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 channel 52, the side hole 29, and the first inner hole 30 are connected, and the fluid at the inlet hole 7 can enter the first fluid channel 52 and then reach the first inner hole 30 through the side hole 29; when the first control valve body is combined with the first valve seat 8, the inlet hole 7 cannot be connected with the first fluid channel 52, and the fluid cannot enter the pressure regulator 1 at this time.

[0053] Optionally, a first rod groove 25 is provided on the outer circumferential surface of the first rod 23, and a first rod sealing element 24 is provided at the first rod groove 25. The first rod sealing element 24 is suitable for fitting with the 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.

[0054] A first piston groove 28 is provided on the outer circumferential surface of the first piston 26, and a first piston sealing element 27 is provided at the first piston groove 28. The first piston sealing element 27 is suitable for fitting with the bottom of the first piston groove 28 and the inner circumferential surface of the second conduit section 10, thereby improving the sealing performance between the first piston 26 and the second conduit section 10.

[0055] A first groove 13 is provided between the second conduit section 10 and the third conduit section 15 . The diameter of the first groove 13 is greater than the diameter of the third conduit section 15 . A first retaining ring 14 is provided in the first groove 13 . The first retaining ring 14 is used to limit the separator 5 .

[0056] Furthermore, a first conical annular 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 annular surface 12 is equal to the diameter of the second conduit section 10, and the diameter of the large diameter end of the first conical annular surface 12 is equal to the diameter of the first groove 13. The separator 5 is suitable for abutting against the first conical annular surface 12, and the first conical annular surface 12 can position the separator 5 so that the position of the separator 5 in the inner cavity 6 is accurate.

[0057] 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 is located in the second conduit section 10 , and the tapered connecting section 35 is suitable for abutting against the first tapered annular surface 12 .

[0058] Optionally, a separator groove 34 is provided on the outer peripheral surface of the small diameter section 32, and a separator sealing element 33 is provided at the separator groove 34. The separator sealing element 33 is suitable for fitting with the 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.

[0059] The large diameter section 36 has an outlet end face 37 suitable for abutting the first retaining ring 14 and an inlet end face 39 suitable for abutting the first pressure control valve assembly 3. The large diameter section 36 abuts the first retaining ring 14, and the conical connecting section 35 abuts the first conical annular surface 12, thereby the separator 5 is fixed in the inner cavity 6 and will not move at will.

[0060] The separator 5 has a central end hole 42 inside, and an end of the central end hole 42 has a second valve seat 43 for sealing inside the second pressure control valve assembly 4 so that the outlet of the first pressure control valve assembly 3 is fluidly connected to the inlet of the second pressure control valve assembly 4 .

[0061] Specifically, the second pressure control valve assembly 4 may include: a second control valve body and a second spring 16, the second control valve body and the second valve seat 43 may be selectively engaged or separated, the second spring 16 is located in the third conduit section 15 and is suitable for applying an elastic force to the second control valve body away from the second valve seat 43. When the fluid pressure in the inner cavity 6 is relatively low, the elastic force of the second spring 16 on the second control valve body causes the second control valve body to be away from the second valve seat 43. At this time, the second control valve body is separated from the second valve seat 43, and the fluid can continuously enter the third conduit section 15 through the second conduit section 10. When the pressure in the inner cavity 6 increases to a certain pressure threshold, the elastic force of the second spring 16 on the second control valve body is insufficient to cause the second control valve body to be away from the second valve seat 43. At this time, the second control valve body is engaged with the second valve seat 43, and the fluid cannot enter the third conduit section 15 through the second conduit section 10.

[0062] Further, the second control valve body may include: a second rod 44 and a second piston 48, the second rod 44 is in contact and sliding cooperation with the central end hole 42 and has a second sealing surface 45 suitable for sealing with the second valve seat 43, the second piston 48 is fixedly connected to the second rod 44, and the second piston 48 is in contact and sliding cooperation with the third conduit section 15, and the second spring 16 is arranged between the first retaining ring 14 and the second piston 48.

[0063] 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 retaining 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 .

[0064] Optionally, the second piston 48 is formed integrally with the second rod 44 .

[0065] Furthermore, the second control valve body has a second inner hole 51 penetrating the second rod 44 and the second piston 48 , so that the central end hole 42 is fluidically connected to the third conduit section 15 .

[0066] Specifically, the interior of the separator 5 also has a central front hole 38 connected to the second conduit section 10, the central 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 central front hole 38 and the central end hole 42, the central front hole 38 and the separator groove 41 are connected through the eccentric hole 40, and the rear end face of the second valve seat 43 is located in the separator groove 41, so that the second inner hole 51 can be selectively connected to the separator groove 41.

[0067] When the second control valve body is separated from the second valve seat 43, the first inner hole 30, the center front hole 38, the eccentric hole 40, the separator groove 41, the second inner hole 51, and the outlet hole 20 are connected, and the fluid at the first inner hole 30 can enter the center front hole 38, and then reach the separator groove 41 through the eccentric hole 40, and then enter the second inner hole 51, and finally flow out from the outlet hole 20; when the second control valve body is combined with the second valve seat 43, the center front hole 38 cannot be connected with the second inner hole 51, and at this time, the fluid at the center front hole 38 cannot enter the second inner hole 51.

[0068] Optionally, a second rod groove 47 is provided on the outer circumferential surface of the second rod 44, and a second rod sealing element 46 is provided at the second rod groove 47. The second rod sealing element 46 is suitable for fitting with the bottom of the second rod groove 47 and the inner circumferential surface of the center end hole 42, thereby improving the sealing performance between the second rod 44 and the center end hole 42.

[0069] A second piston groove 50 is provided on the outer circumferential surface of the second piston 48, and a second piston sealing element 49 is provided at the second piston groove 50. The second piston sealing element 49 is suitable for fitting with the bottom of the second piston groove 50 and the inner circumferential surface of the third conduit section 15, thereby improving the sealing performance between the second piston 48 and the third conduit section 15.

[0070] A second groove 18 is provided on the side of the third conduit section 15 facing away from the second conduit section 10 . The diameter of the second groove 18 is larger than the diameter of the third conduit section 15 . A second retaining ring 19 for limiting the second pressure control valve assembly 4 is provided in the second groove 18 .

[0071] Furthermore, a second conical annular surface 17 is provided between the second groove 18 and the third conduit section 15, the diameter of the small diameter end of the second conical annular surface 17 is equal to the diameter of the third conduit section 15, and the diameter of the large diameter end of the second conical annular surface 17 is equal to the diameter of the second groove 18. The second conical annular surface 17 is provided to facilitate the installation of the second pressure control valve assembly 4 in the inner cavity 6.

[0072] Optionally, the housing 2 is an integral cylindrical housing having a central stepped inner cavity 6 to accommodate all moving parts of each pressure control valve assembly and a separator 5 positioned by a retaining ring or a 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 docking multiple housings 2.

[0073] The following describes the use process of the pressure regulator 1 of the present invention.

[0074] In the initial stage, the fluid pressure at the inlet hole 7 is relatively small, and 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, and the elastic force of the second spring 16 on the second control valve body makes the second control valve body away from the second valve seat 43. At this time, the first control valve body is separated from the first valve seat 8, and the first control valve body can stop against the inlet end face 39 of the separator 5, and the second control valve body is separated from the second valve seat 43, and the second control valve body can stop against the second retaining ring 19. The fluid can continuously enter the first fluid channel 52 of the first conduit section 9 through the inlet hole 7, and the fluid in the first fluid channel 52 reaches the first inner hole 30 through the side hole 29. The fluid at the first inner hole 30 can enter the central front hole 38, and then reach the separator groove 41 through the eccentric hole 40, and then enter the second inner hole 51, and finally flow out from the outlet hole 20.

[0075] When the pressure in the inner cavity 6 increases to a certain pressure threshold, the elastic force of the first spring 11 on the first control valve body is insufficient to keep the first control valve body away from the first valve seat 8. At this time, the first control valve body engages with the first valve seat 8, and the fluid cannot enter the first conduit section 9 through the inlet hole 7. The elastic force of the second spring 16 on the second control valve body is insufficient to keep the second control valve body away from the second valve seat 43. At this time, the second control valve body engages with the second valve seat 43, and the fluid cannot enter the third conduit section 15 through the second conduit section 10.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pressure regulator, characterized in that: include: A shell (2), wherein the shell (2) has an inner cavity (6), and the shell (2) has an inlet hole (7) and an outlet hole (20); A first pressure control valve assembly (3) and a second pressure control valve assembly (4), wherein the first pressure control valve assembly (3) and the second pressure control valve assembly (4) are located in the inner cavity (6); a separator (5), the separator (5) being located in the inner cavity (6) and being arranged between the first pressure control valve assembly (3) and the second pressure control valve assembly (4), the inlet hole (7) and the outlet hole (20) being selectively connected via the first pressure control valve assembly (3), the separator (5) and the second pressure control valve assembly (4), wherein the inlet hole (7) is selectively connected to the first pressure control valve assembly (3), and the outlet hole (20) is selectively connected to the second pressure control valve assembly (4), wherein the fluid passes through the housing (2) to adjust the fluctuating pressure of the inlet hole (7) to the stable pressure of the outlet hole (20); 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 the first pressure control valve assembly (3), wherein the diameter of the second conduit section (10) is greater than the diameter of the first conduit section (9); a third conduit section (15), used for external sealing and guiding of the second pressure control valve assembly (4), the diameter of the third conduit section (15) being greater than the diameter of the second conduit section (10); A first groove (13) is provided between the second conduit section (10) and the third conduit section (15); A first conical annular surface (12) is provided between the first groove (13) and the second conduit section (10); The separator (5) comprises: a small diameter section (32), a large diameter section (36), and a conical connecting section (35) connecting the small diameter section (32) and the large diameter section (36), wherein the small diameter section (32) is located in the second conduit section (10), and the conical connecting section (35) is suitable for abutting against the first conical annular surface (12); The separator (5) has a central end hole (42) inside, and the end of the central end hole (42) has a second valve seat (43) for sealing inside the second pressure control valve assembly (4) so ​​that the outlet of the first pressure control valve assembly (3) is fluidically connected to the inlet of the second pressure control valve assembly (4).

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

3. The pressure regulator according to claim 1 or 2, characterized in that: The housing (2) comprises: a first valve seat (8) for internal sealing of the first pressure control valve assembly (3); the inlet hole (7) is opened on the first valve seat (8); the first pressure control valve assembly (3) and the first valve seat (8) can be selectively engaged or separated to block or open the inlet hole (7).

4. The pressure regulator according to claim 3, characterized in that The first pressure control valve assembly (3) comprises: a first control valve body and a first spring (11), wherein the first control valve body can be selectively engaged with or separated from the first valve seat (8), and the first spring (11) is located in the second conduit section (10) and is suitable for applying an elastic force to the first control valve body away from the first valve seat (8).

5. The pressure regulator according to claim 4, characterized in that The first control valve body comprises: A first rod (23), the first rod (23) being adapted to be in contact and sliding cooperation with the first conduit section (9); A first piston (26), the first piston (26) is fixedly connected to the first rod (23), and the first piston (26) is suitable for contacting and sliding with the second conduit section (10); A first flow control plug (21), the first flow control plug (21) is fixed to the first rod (23) and is suitable for contacting and sliding with the first conduit section (9), and the first flow control plug (21) has a first sealing surface (22) suitable for sealing with the first valve seat (8).

6. The pressure regulator according to claim 5, characterized in that A spring supporting annular surface (31) is provided between the first conduit section (9) and the second conduit section (10), and the first spring (11) is provided between the first piston (26) and the spring supporting annular surface (31).

7. The pressure regulator according to claim 5, characterized in that The first control valve body has a first inner hole (30) penetrating the first rod (23) and the first piston (26); a first fluid channel (52) is provided between the outer circumference of the first flow control plug (21) and the inner circumference of the first conduit section (9); and the first rod (23) is provided with a side hole (29) connecting the first fluid channel (52) and the first inner hole (30) so that the first conduit section (9) is fluidically connected to the second conduit section (10).

8. The pressure regulator according to claim 5, characterized in that A first rod groove (25) is arranged on the outer circumference of the first rod (23); a first rod sealing element (24) is arranged at the first rod groove (25); the first rod sealing element (24) is adapted to fit with the bottom of the first rod groove (25) and the inner circumference of the first conduit section (9); A first piston groove (28) is arranged on the outer peripheral surface of the first piston (26), and a first piston sealing element (27) is arranged at the first piston groove (28). The first piston sealing element (27) is suitable for fitting with the bottom of the first piston groove (28) and the inner peripheral surface of the second conduit section (10).

9. The pressure regulator according to claim 1, characterized in that The diameter of the first groove (13) is greater than the diameter of the third conduit section (15), and a first retaining ring (14) is arranged in the first groove (13).

10. The pressure regulator according to claim 9, characterized in that The diameter of the small diameter end of the first conical annular surface (12) is equal to the diameter of the second conduit section (10), the diameter of the large diameter end of the first conical annular surface (12) is equal to the diameter of the first groove (13), and the separator (5) is suitable for abutting against the first conical annular surface (12).

11. The pressure regulator according to claim 1, characterized in that A separator groove (34) is provided on the outer peripheral surface of the small diameter section (32), and a separator sealing element (33) is provided at the separator groove (34). The separator sealing element (33) is suitable for fitting with the bottom of the separator groove (34) and the inner peripheral surface of the second conduit section (10).

12. The pressure regulator according to claim 10, characterized in that The large diameter section (36) has an outlet end surface (37) suitable for abutting against the first retaining ring (14) and an inlet end surface (39) suitable for abutting against the first pressure control valve assembly (3).

13. The pressure regulator according to claim 12, characterized in that The second pressure control valve assembly (4) comprises: a second control valve body and a second spring (16), wherein the second control valve body can be selectively engaged with or separated from the second valve seat (43), and the second spring (16) is located in the third conduit section (15) and is suitable for applying an elastic force to the second control valve body away from the second valve seat (43).

14. The pressure regulator according to claim 13, characterized in that The second control valve body comprises: a second rod (44), the second rod (44) being in sliding contact with the central end hole (42) and having a second sealing surface (45) suitable for sealing with the second valve seat (43); A second piston (48), wherein the second piston (48) is fixedly connected to the second rod (44), and the second piston (48) is in contact and sliding cooperation with the third conduit section (15), and the second spring (16) is arranged between the first retaining ring (14) and the second piston (48).

15. The pressure regulator according to claim 14, characterized in that The second control valve body has a second inner hole (51) therein which passes through the second rod (44) and the second piston (48) so that the central end hole (42) is fluidically connected to the third conduit section (15).

16. The pressure regulator according to claim 15, characterized in that The separator (5) further comprises a central front hole (38) in communication with the second conduit section (10), the central front hole (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 hole (38) and the central end hole (42), the central front hole (38) being connected with the separator groove (41) via an eccentric hole (40), and the rear end face of the second valve seat (43) being located in the separator groove (41) so that the second inner hole (51) can be selectively connected with the separator groove (41).

17. The pressure regulator according to claim 14, characterized in that A second rod groove (47) is provided on the outer circumference of the second rod (44), and a second rod sealing element (46) is provided at the second rod groove (47), and the second rod sealing element (46) is suitable for fitting with the groove bottom of the second rod groove (47) and the inner circumference of the central end hole (42); A second piston groove (50) is provided on the outer circumferential surface of the second piston (48), and a second piston sealing element (49) is provided at the second piston groove (50). The second piston sealing element (49) is suitable for fitting with the bottom of the second piston groove (50) and the inner circumferential surface of the third conduit section (15).

18. The pressure regulator according to claim 1, characterized in that A second groove (18) is provided on a side of the third conduit section (15) facing away from the second conduit section (10); the diameter of the second groove (18) is larger than the diameter of the third conduit section (15); and a second retaining ring (19) for limiting the position of the second pressure control valve assembly (4) is provided in the second groove (18).

19. The pressure regulator according to claim 18, characterized in that A second conical annular surface (17) is provided between the second groove (18) and the third conduit section (15); the diameter of the small diameter end of the second conical annular surface (17) is equal to the diameter of the third conduit section (15); and the diameter of the large diameter end of the second conical annular surface (17) is equal to the diameter of the second groove (18).

20. The pressure regulator according to claim 1, characterized in that The shell (2) is an integrated cylindrical shell.

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