Bidirectional pressure valve

Abstract

The utility model discloses a two-way pressure valve which comprises a first shell and a second shell which are connected with each other. A first valve element is axially arranged in a cavity of the first shell in a sliding mode, one end of the first valve element is sleeved with a second sealing ring, the second sealing ring corresponds to the first limiting inner boss of the first shell, and a first spring is axially arranged between the other end of the first valve element and the second shell. A second valve element is axially arranged in a cavity of the first valve element in a sliding mode, an adjusting screw with a through hole is arranged at one end of the cavity of the first valve element, one end of the second valve element is sleeved with a third sealing ring, the third sealing ring corresponds to a second limiting inner boss of the first valve element, and a second spring is arranged between the other end of the second valve element and the adjusting screw. The first valve element and the second valve element achieve fluid circulation in a grooving or punching mode. According to the one-way valve, the pressure release valve is integrated in the one-way valve while the function of the one-way valve is guaranteed, pressure can be effectively released by opening the pressure release valve when the pressure of a pipeline on one side is too large, and then the pipeline can be effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a two-way pressure valve. Background Technology

[0002] In a dual-fuel-tank system for gasoline-powered vehicles, the two fuel tanks are independently connected to the engine. Therefore, each fuel line has a one-way valve to prevent fuel from crossing between the two tanks. However, under certain operating conditions, the high-pressure fuel pump on the engine side may release pressure to the low-pressure fuel pump on the fuel tank side. This can cause excessive pressure in the fuel line between the one-way valve and the high-pressure fuel pump on the engine, which can lead to fuel line rupture in severe cases. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bidirectional pressure valve, including a housing 1 and a housing 2 connected to each other;

[0004] A valve core is axially slidably disposed within the cavity of the housing. A sealing ring is fitted on one end of the valve core, and the sealing ring corresponds to the limiting inner boss of the housing. A spring is axially disposed between the other end of the valve core and the housing.

[0005] A valve core 2 is axially slidably disposed in the cavity of valve core 1, and an adjusting screw with a through hole is provided at one end of the cavity of valve core 1. A sealing ring 3 is sleeved on one end of valve core 2, and the sealing ring 3 corresponds to the limiting inner boss 2 of valve core 1. A spring 2 is provided between the other end of valve core 2 and the adjusting screw.

[0006] A sealing ring is also provided between the connecting ends of the first housing and the second housing.

[0007] In one specific embodiment, the valve core has a small diameter section and the small diameter section corresponds to the liquid inlet end of the housing; the valve core also has an annular cavity located radially outside the cavity of the valve core and the annular cavity is connected to the housing, and the small diameter section has a valve core hole that penetrates the annular cavity.

[0008] The valve core 2 has a small diameter section 2 and the small diameter section 2 corresponds to the liquid inlet end of the housing 2; the small diameter section 2 is radially provided with a valve core hole 2 and the valve core hole 2 extends into the cavity of the valve core 2.

[0009] In another specific embodiment, the outer wall of the valve core is provided with a through groove or through hole in the axial direction;

[0010] The outer wall of the valve core 2 is provided with a through groove 2 or a through hole 2.

[0011] Through the above technical solution, this utility model, while ensuring the function of the one-way valve, integrates the function of the pressure relief valve composed of valve core two into the one-way valve composed of valve core one. When the pressure on one side of the pipeline is too high, the pressure relief valve can be opened to relieve pressure, thereby effectively protecting the pipeline. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the bidirectional pressure valve assembly state disclosed in Example 1;

[0014] Figure 2 This is an exploded view of the bidirectional pressure valve disclosed in Example 2;

[0015] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0016] Figure 4 This is a cross-sectional view of the bidirectional pressure valve when it is open in the forward direction, as disclosed in Embodiment 2.

[0017] Figure 5 This is a cross-sectional view of the bidirectional pressure valve in reverse pressure holding as disclosed in Example 2.

[0018] Figure 6 This is a cross-sectional structural diagram of the bidirectional pressure valve under reverse pressure relief as disclosed in Example 2;

[0019] Figure 7 This is an exploded view of the bidirectional pressure valve disclosed in Example 3;

[0020] Figure 8 for Figure 7 Enlarged structural diagram of section B;

[0021] Figure 9 This is a cross-sectional view of the bidirectional pressure valve disclosed in Embodiment 3 when it is open in the forward direction.

[0022] Figure 10 This is a cross-sectional view of the bidirectional pressure valve in reverse pressure holding as disclosed in Example 3.

[0023] Figure 11 This is a cross-sectional view of the bidirectional pressure valve in reverse pressure relief as disclosed in Example 3.

[0024] The numbers in the image represent:

[0025] 10. Housing 1; 11. External thread 1; 12. Limiting inner boss 1; 13. Limiting inner boss 2; 20. Housing 2; 21. Internal thread 1; 30. Valve core 1; 31. Small diameter section 1; 311. Valve core hole 1; 32. Annular cavity; 33. Limiting inner boss 2; 34. Groove 1; 35. Limiting outer boss; 40. Sealing ring 1; 50. Spring 1; 60. Sealing ring 2; 70. Valve core 2; 71. Small diameter section 2; 711. Valve core hole 2; 72. Groove 2; 80. Sealing ring 3; 90. Adjusting screw; 100. Spring 2. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Example 1:

[0028] refer to Figure 1-3 The first embodiment of this invention provides a bidirectional pressure valve, which includes a housing 10 and a housing 20 connected to each other. (In this embodiment, the connecting end of the housing 10 has an external thread 11, and the connecting end of the housing 20 has an internal thread 21. The housing 10 and the housing 20 are locked together by the external thread 11 and the internal thread 21. However, it is not limited to threaded connection. The connection between the housing 10 and the housing 20 can also be achieved by ultrasonic welding or other methods. There is no specific limitation on this. The purpose is to achieve a stable connection between the two.)

[0029] A valve core 30 is axially slidably disposed within the cavity of housing 10. One end of the valve core 30 is fitted with a sealing ring 60, which corresponds to the inner limiting boss 12 of housing 10. (In addition, housing 10 also has an inner limiting boss 13 with a diameter larger than the inner limiting boss 12, and valve core 30 has an outer limiting boss 35 corresponding to the inner limiting boss 13. Thus, the sealing ring 60 is effectively prevented from being damaged by pressure for a long time through the mechanical limiting of the inner limiting boss 13 and the outer limiting boss 35.) A spring 50 is axially disposed between the other end of the valve core 30 and housing 20.

[0030] A second valve core 70 is axially slidably disposed within the cavity of a first valve core 30, and an adjusting screw 90 with a through hole is provided at one end of the cavity of the first valve core 30 (wherein, the first valve core 30 and the adjusting screw 90 are tightly connected by internal and external threads; however, it is not limited to threaded connection, but can also be connected by ultrasonic welding or other methods, which are not specifically limited, as long as a stable connection between the two can be achieved). A third sealing ring 80 is sleeved on one end of the second valve core 70, and the third sealing ring 80 corresponds to the limiting inner boss 2 33 of the first valve core 30 (in addition, a corresponding mechanical limiting structure is also provided for the sealing ring 80 to effectively prevent the third sealing ring 80 from being damaged by pressure for a long time, which is not shown in the figure and will not be elaborated on). A second spring 100 is provided between the other end of the second valve core 70 and the adjusting screw 90.

[0031] A sealing ring 40 is also provided between the connecting ends of housing 10 and housing 20.

[0032] Among them, valve core 30 has a small diameter section 31 (the small diameter section 31 can be reduced in diameter by circumferential cutting of the outer diameter of valve core 30, or by axial groove cutting to reduce the diameter locally, which is not specifically limited) and the small diameter section 31 corresponds to the liquid inlet end of housing 10; valve core 30 is also provided with an annular cavity 32 located on the radial outer side of the cavity of valve core 30 and the annular cavity 32 is connected to housing 20 (usually, one end of spring 50 is sleeved in the annular cavity 32 to improve stability), and the small diameter section 31 is radially provided with a valve core hole 311 that penetrates to the annular cavity 32.

[0033] Among them, valve core 2 70 has a small diameter section 2 71 and the small diameter section 2 71 corresponds to the liquid inlet end of housing 2 20; the small diameter section 2 71 is radially provided with valve core hole 2 711 and the valve core hole 2 711 extends into the cavity of valve core 2 70.

[0034] When this embodiment one is working:

[0035] refer to Figure 4 When the pressure inside the right housing 20 is low, fluid enters from the inlet end of the left housing 10, simultaneously pressurizing valve core 30 and valve core 70. Then: valve core 30 moves towards housing 20 under the pressure of the fluid on the left and compresses spring 50, causing sealing ring 60 to disengage from housing 10, allowing fluid to flow through valve core hole 311 into annular cavity 32 and housing 20, achieving forward fluid flow; simultaneously, fluid entering from the left housing 10 enters the valve core 30 through the through hole of adjusting screw 90 and pressurizes valve core 70, causing sealing ring 80 to abut against the limiting inner boss 33 of valve core 30, achieving a seal.

[0036] refer to Figure 5When the pressure inside the right-side housing 20 increases to a certain value, fluid enters from the inlet end of the housing 20 and simultaneously applies pressure to valve core 30 and valve core 70. Then: valve core 30 moves under the pressure of the fluid on the right side and the elastic force of spring 50, causing sealing ring 60 to abut against the limiting inner boss 12 of housing 10 to achieve a seal; simultaneously, since the fluid pressure entering from the left-side housing 10 is less than the elastic force of spring 100, valve core 70, under the action of spring 100, causes sealing ring 80 to continue abutting against the limiting inner boss 33 of valve core 30 to achieve a seal; therefore, the one-way valve function is achieved by closing the valve core assembly.

[0037] refer to Figure 6 When the pressure inside the right-side housing 20 further increases to a high-pressure state, fluid enters from the inlet end of the housing 20 and simultaneously pressurizes valve core 30 and valve core 70. Then: valve core 30 moves under the pressure of the fluid on the right side and the elastic force of spring 50, and the sealing ring 60 abuts against the limiting inner boss 12 of housing 10 to achieve a seal. At the same time, since the pressure of the fluid entering from the left-side housing 10 is greater than the elastic force of spring 100, the fluid enters from the right side of the through hole of valve core 30 and pressurizes valve core 70. Under the action of pressure, valve core 70 compresses spring 100 and causes sealing ring 80 to disengage from the limiting inner boss 33 of valve core 30. At this time, the fluid flows from the valve core hole 711 of valve core 70 to the cavity of valve core 30 and enters the interior of housing 10 through the through hole of locking screw 90, thereby realizing the pressure relief function through valve core 70 to protect the system.

[0038] Example 2:

[0039] Based on Example 1 and with reference Figure 7 and 8 The difference between this embodiment 2 and embodiment 1 is that the outer wall of valve core 1 30 is provided with a through groove 1 34 or a through hole 1 in the axial direction, and the outer wall of valve core 2 70 is provided with a through groove 2 72 or a through hole 2 in the axial direction.

[0040] When this second embodiment is working:

[0041] refer to Figure 9 When the pressure inside the right housing 20 is low, fluid enters from the inlet end of the left housing 10 and simultaneously pressurizes valve core 30 and valve core 70. Then: under the pressure of the fluid on the left, valve core 30 moves towards housing 20 and compresses spring 50 to disengage sealing ring 60 from housing 10, allowing fluid to enter the annular cavity 32 and housing 20 through the groove 34 or through hole 1 to achieve positive fluid flow; at the same time, the fluid entering from the left housing 10 enters the valve core 30 through the through hole of locking screw 90 and pressurizes valve core 70 to make sealing ring 80 abut against the limiting inner boss 33 of valve core 30 to achieve sealing.

[0042] refer to Figure 10 When the pressure inside the right-side housing 20 increases to a certain value, fluid enters from the inlet end of the housing 20 and simultaneously applies pressure to valve core 30 and valve core 70. Then: valve core 30 moves under the pressure of the fluid on the right side and the elastic force of spring 50, causing sealing ring 60 to abut against the limiting inner boss 12 of housing 10 to achieve a seal; simultaneously, since the fluid pressure entering from the left-side housing 10 is less than the elastic force of spring 100, valve core 70, under the action of spring 100, causes sealing ring 80 to continue abutting against the limiting inner boss 33 of valve core 30 to achieve a seal; therefore, the one-way valve function is achieved by closing the valve core assembly.

[0043] refer to Figure 11 When the pressure inside the right-side housing 20 further increases to a high-pressure state, fluid enters from the inlet end of the housing 20 and simultaneously pressurizes valve core 30 and valve core 70. Then: valve core 30 moves under the pressure of the fluid on the right side and the elastic force of spring 50, and the sealing ring 60 abuts against the limiting inner boss 12 of housing 10 to achieve a seal. At the same time, since the pressure of the fluid entering from the left-side housing 10 is greater than the elastic force of spring 100, the fluid enters from the right side of the through hole of valve core 30 and pressurizes valve core 70. Under the action of pressure, valve core 70 compresses spring 100 and causes sealing ring 80 to disengage from the limiting inner boss 33 of valve core 30. At this time, the fluid flows from the groove 72 or through hole 2 of valve core 70 into the cavity of valve core 30 and enters the interior of housing 10 through the through hole of locking screw 90, thereby realizing the pressure relief function through valve core 70 to protect the system.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bidirectional pressure valve, characterized in that: It includes a first shell (10) and a second shell (20) that are connected to each other; A valve core (30) is axially slidably disposed in the cavity of the housing (10). A sealing ring (60) is sleeved on one end of the valve core (30) and the sealing ring (60) corresponds to the limiting inner boss (12) of the housing (10). A spring (50) is axially disposed between the other end of the valve core (30) and the housing (20). A second valve core (70) is axially slidably disposed in the cavity of the first valve core (30), and an adjusting screw (90) with a through hole is provided at one end of the cavity of the first valve core (30). A sealing ring (80) is sleeved on one end of the second valve core (70), and the sealing ring (80) corresponds to the limiting inner boss (33) of the first valve core (30). A spring (100) is provided between the other end of the second valve core (70) and the adjusting screw (90). The valve core (30) has a small diameter section (31) and the small diameter section (31) corresponds to the liquid inlet end of the housing (10); the valve core (30) is also provided with an annular cavity (32) located on the radial outer side of the cavity of the valve core (30) and the annular cavity (32) is connected to the housing (20); the small diameter section (31) is radially provided with a valve core hole (311) that penetrates to the annular cavity (32); The valve core two (70) has a small diameter section two (71) and the small diameter section two (71) corresponds to the liquid inlet end of the housing two (20); the small diameter section two (71) is radially provided with a valve core hole two (711) and the valve core hole two (711) extends through the cavity of the valve core two (70).

2. The bidirectional pressure valve according to claim 1, characterized in that, A sealing ring (40) is also provided between the connecting ends of the first housing (10) and the second housing (20).

3. A bidirectional pressure valve, characterized in that: It includes a first shell (10) and a second shell (20) that are connected to each other; A valve core (30) is axially slidably disposed in the cavity of the housing (10). A sealing ring (60) is sleeved on one end of the valve core (30) and the sealing ring (60) corresponds to the limiting inner boss (12) of the housing (10). A spring (50) is axially disposed between the other end of the valve core (30) and the housing (20). A second valve core (70) is axially slidably disposed in the cavity of the first valve core (30), and an adjusting screw (90) with a through hole is provided at one end of the cavity of the first valve core (30). A sealing ring (80) is sleeved on one end of the second valve core (70), and the sealing ring (80) corresponds to the limiting inner boss (33) of the first valve core (30). A spring (100) is provided between the other end of the second valve core (70) and the adjusting screw (90). The outer wall of the valve core (30) is provided with a through groove (34) or a through hole. The outer wall of the valve core (70) is provided with a through groove (72) or a through hole.

4. A bidirectional pressure valve according to claim 3, characterized in that, A sealing ring (40) is also provided between the connecting ends of the first housing (10) and the second housing (20).

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