Steel ball valve element type pressure regulating assembly

Abstract

The invention discloses a steel ball valve element type pressure regulating assembly which comprises a lower shell, an upper shell, a valve seat, a high-pressure safety valve assembly, a low-pressure safety valve assembly, a negative-pressure-preventing safety valve assembly, a high-pressure safety valve spring and a low-pressure safety valve spring, wherein the high-pressure safety valve assembly, the low-pressure safety valve assembly, the negative-pressure-preventing safety valve assembly, the high-pressure safety valve spring and the low-pressure safety valve spring are installed on the valve seat. The lower shell, the upper shell and the valve seat are connected through a first screw, a C opening and a D opening are formed in the lower shell and serve as inlets, and an A opening and a B opening are formed in the upper shell and serve as outlets. A steel ball, a valve seat 1, a ball seat, a pilot valve assembly and a pilot valve spring are integrated in an inner cavity of the low-pressure safety valve assembly, the product is driven to rotate when an airplane tilts, then the steel ball rolls in the ball seat, opening and closing of the pilot valve assembly are controlled, and the effect of adjusting the opening pressure of the low-pressure safety valve is achieved. The aircraft does not leak oil during attitude flight such as head-down flight, side inclined flight or head-up flight, and the product is compact in structure, high in integration level, small in size and light in weight.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft fuel tank pressure control, and particularly relates to a steel ball spool type pressure regulating component. Background Art

[0002] In order to increase the flight altitude of an aircraft, it is usually necessary to pressurize the fuel tank. When the aircraft performs a nose-down flight, a side tilt flight, or a nose-up flight, in order to prevent fuel from overflowing from the low-pressure safety valve, there is a need to close the low-pressure safety valve. Summary of the Invention

[0003] Aiming at the problem that fuel overflows from the safety valve when the existing fuel tank pressure control valve components are used in a nose-down flight, a side tilt flight, or a nose-up flight of the aircraft, the present invention provides a steel ball spool type pressure regulating component.

[0004] The present invention provides a steel ball valve core type pressure regulating assembly, which includes a lower housing, an upper housing, a valve seat, and a high-pressure safety valve assembly, a low-pressure safety valve assembly, an anti-negative pressure safety valve assembly, and a valve cover installed on the valve seat. The valve seat is placed between the lower housing and the upper housing and is fixedly connected by a first screw. A cavity one is formed between the valve seat and the upper housing, and a cavity two is formed between the valve seat and the lower housing. An inlet one is provided on one side of the lower housing, and an inlet two is provided at the bottom. An outlet one and an outlet two are respectively provided on both sides of the upper housing. The low-pressure safety valve assembly includes a low-pressure safety valve, and its inner cavity integrates a valve seat, a ball seat, a steel ball, a pilot valve assembly, and a pilot valve spring. The steel ball is placed in the ball seat and can roll freely. The ball seat is installed in the valve seat. A guide hole is provided at the center of the bottom of the ball seat. One end of the pilot valve assembly is placed inside the bottom of the valve seat, and the other end can move freely through the guide hole. One end of the pilot valve spring is placed inside the pilot valve assembly, and the other end is connected to the valve seat. A low-pressure safety valve spring is sleeved outside the low-pressure safety valve. A first pilot hole is provided at the center of the bottom of the low-pressure safety valve, and a second pilot hole is provided at the center of the bottom of the valve seat. One end of the valve cover is placed above the low-pressure safety valve assembly and is connected to the valve seat, and the low-pressure safety valve, the valve seat, the ball seat, the steel ball, the pilot valve assembly, and the pilot valve spring are placed on one side inside the cavity one. The steel ball rolls in the ball seat to control the opening and closing of the pilot valve assembly. The high-pressure safety valve assembly includes a high-pressure safety valve, and a high-pressure safety valve spring sleeved outside it is placed on the other side inside the cavity one. A first through hole is provided at the connection between the valve seat and the high-pressure safety valve assembly, and a second through hole is provided at the connection between the valve seat and the low-pressure safety valve assembly. The anti-negative pressure safety valve assembly is connected to the valve seat while avoiding the first through hole and the second through hole and is placed inside the lower housing. There are two groups of the anti-negative pressure safety valve assembly before and after, which includes an anti-vacuum valve and an anti-vacuum spring provided outside the anti-vacuum valve. The other end of the valve cover is threadedly connected to a pipe joint. A first channel is provided inside the valve cover and is communicated with the cavity two. When the aircraft performs attitude tilting, it drives this product to rotate. Furthermore, the steel ball rolls in the ball seat to control the opening and closing of the pilot valve assembly, achieving the effect of regulating the opening pressure of the low-pressure safety valve.

[0005] The inclination angle of the contact surface between the ball seat and the steel ball is 15°. The steel ball can roll freely on the ball seat. When placed vertically, the steel ball presses down the pilot valve assembly, and the gas in the inner cavity of the low-pressure safety valve assembly can be depressurized through the first pilot hole and the second pilot hole. When the product is tilted by more than 15°, after the steel ball rolls, the pilot valve assembly fits with the ball seat under the action of the pilot valve spring, closing the guide hole.

[0006] A first filter screen is fixedly installed at the bottom of the low-pressure safety valve assembly through a first screw to prevent impurities from blocking the pilot hole.

[0007] A second filter screen is provided between the valve cover and the pipe joint. An elastic retaining ring is provided between the second filter screen and the pipe joint. A boss is provided on the outer side of the middle part of the pipe joint to abut against the end of the valve cover. A first sealing ring is provided at the connection between the inner side of the end of the valve cover and the pipe joint.

[0008] A second sealing ring is provided at the connection between the low-pressure safety valve assembly and the valve seat. A third sealing ring is provided at the connection between the low-pressure safety valve and the upper housing. A fourth sealing ring is provided at the connection between the high-pressure safety valve assembly and the valve seat. A fifth sealing ring is provided at the contact between the high-pressure safety valve spring and the upper housing.

[0009] A sixth sealing ring is installed at the connection between the upper housing and the valve seat. A seventh sealing ring is installed at the connection between the valve seat and the valve cover. An eighth sealing ring is installed at the connection between the ball seat and the valve seat.

[0010] A washer is provided at the connection where the screw connects the lower housing, the valve seat and the upper housing.

[0011] A tenth sealing ring is provided at the connection between the anti-vacuum valve and the lower housing. An eleventh sealing ring is provided at the connection between the bottom end of the anti-vacuum spring and the lower housing. A twelfth sealing ring is provided at the connection between the anti-vacuum valve and the valve seat.

[0012] The valve cover and the valve seat are fixedly connected by countersunk head screws.

[0013] When the gas pressure in the fuel tank rises to the opening pressure of the low-pressure safety valve, the low-pressure safety valve opens to relieve pressure. When the pressure is too high, up to the opening pressure of the high-pressure safety valve, the high-pressure safety valve opens to relieve pressure, ensuring that the pressure in the fuel tank does not exceed the pressure limit and ensuring the safety of the fuel tank.

[0014] When the aircraft is flying straight, the steel ball presses down the pilot valve assembly, and the pilot hole between the pilot valve assembly and the ball seat opens. The gas passes through the first pilot hole of the low-pressure safety valve → the second pilot hole of the valve seat → the third pilot hole of the pilot valve assembly → the guiding hole of the ball seat → the passage of the valve cover and is discharged to the atmosphere. At this time, the pressure in the inner cavity of the low-pressure safety valve is the atmospheric pressure, and the opening pressure of the low-pressure safety valve is P1.

[0015] When the aircraft performs attitude flights such as nose-down flight, side-tilt flight or nose-up flight, after the steel ball rolls, the pilot valve assembly that was originally pressed by the steel ball is bounced up by the pilot valve spring and pressed tightly against the ball seat, and the pilot valve assembly closes the guiding hole of the ball seat. The gas enters the inner cavity of the low-pressure safety valve through the pilot hole of the low-pressure safety valve, and a back pressure Pback pressure is established in the inner cavity of the low-pressure safety valve. At this time, the opening pressure P1' of the low-pressure safety valve needs to increase by the pressure of the back pressure Pback pressure, which is higher than P1. It can achieve the purpose that the low-pressure safety valve will not open and leak oil when the aircraft performs attitude flights such as nose-down flight, side-tilt flight or nose-up flight.

[0016] When the aircraft returns to the normal attitude after flying in attitudes such as nose - down flight, side - tilt flight, or nose - up flight, the pilot valve assembly pressed by the rolling steel ball opens the guiding hole of the ball seat. The gas passes through the pilot hole of the low - pressure safety valve → the pilot hole of the valve seat → the pilot hole of the pilot valve assembly → the guiding hole of the ball seat → the valve cover passage and is discharged to the atmosphere. At this time, the internal cavity pressure of the low - pressure safety valve is the atmospheric pressure, and the opening pressure of the low - pressure safety valve returns to P1.

[0017] Advantages of the present invention:

[0018] The steel - ball spool - type pressure - regulating assembly of the present invention is used to control the fuel tank pressure, ensuring that the residual pressure in the aircraft fuel tank is within a reasonable range throughout the flight profile, and there is no oil leakage during attitudes such as nose - down flight, side - tilt flight, or nose - up flight of the aircraft. This product has a compact structure, high integration, small size, and light weight. Description of the Drawings

[0019] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present invention, and are used together with the specification to explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the steel - ball spool - type pressure - regulating assembly provided by the present invention;

[0021] Figure 2 is a perspective view of the steel - ball spool - type pressure - regulating assembly provided by the present invention;

[0022] Figure 3 is Figure 2 a sectional view taken along the II - II direction of

[0023] Figure 4 is Figure 2 a partial view of the I - I direction of

[0024] Figure 5 is Figure 2 an enlarged view in the G direction of

[0025] Figure 6 is a state diagram of the steel - ball spool - type pressure - regulating assembly when the aircraft is flying straight;

[0026] Figure 7 is a state diagram of the steel - ball spool - type pressure - regulating assembly when the aircraft is flying nose - down;

[0027] In the drawings: 1 - lower housing, 1001 - cavity two,

[0028] 2 - valve seat, 2001 - washer, 2002 - through - hole one, 2003 - through - hole two

[0029] 3 - Upper housing, 3001 - Chamber 1

[0030] 4 - Valve cover, 4001 - Passage 1

[0031] 5 - Screw 1

[0032] 6 - High - pressure safety valve assembly, 6001 - High - pressure safety valve, 6002 - High - pressure safety valve spring, 6003 - Seal ring 5, 6004 - Seal ring 4

[0033] 7 - Low - pressure safety valve assembly, 7001 - Low - pressure safety valve, 7001.1 - Pilot hole 1, 7002 - Valve seat, 7002.1 - Pilot hole 2, 7003 - Ball seat, 7003.1 - Guide hole, 7004 - Steel ball, 7005 - Pilot valve assembly, 7005.1 - Pilot hole 3, 7006 - Pilot valve spring, 7007 - Low - pressure safety valve spring, 7008 - Filter screen 1, 7009 - Screw 1, 7010 - Seal ring 2, 7011 - Seal ring 3, 7012 - Seal ring 6, 7013 - Seal ring 7, 7014 - Seal ring 8, 7015 - Seal ring 9

[0034] 8 - Anti - negative - pressure safety valve assembly, 8001 - Anti - vacuum valve, 8002 - Anti - vacuum spring, 8003 - Seal ring 10, 8004 - Seal ring 11, 8005 - Seal ring 12

[0035] 9 - Pipe joint, 9001 - Seal ring 1, 9002 - Elastic retaining ring, 9003 - Filter screen 2

[0036] 10 - Countersunk head screw Detailed implementation mode

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0038] Please refer to Figure 1-5, which shows a schematic structural diagram of the steel ball valve core type pressure regulating component provided by the present invention, including a lower housing 1, an upper housing 3, a valve seat 2, and a high-pressure safety valve component 6, a low-pressure safety valve component 7, an anti-negative pressure safety valve component 8, and a valve cover 4 installed on the valve seat 2. The valve seat 2 is placed between the lower housing 1 and the upper housing 3 and fixedly connected by a first screw 5. A first cavity 3001 is formed between the valve seat 2 and the upper housing 3, and a second cavity 1001 is formed between the valve seat 2 and the lower housing 1. An inlet C is provided on one side of the lower housing 1, and an inlet D is provided at the bottom. An outlet A and an outlet B are respectively provided on both sides of the upper housing 3. The low-pressure safety valve component 7 includes a low-pressure safety valve 7001, and its inner cavity integrates a valve seat 7002, a ball seat 7003, a steel ball 7004, a pilot valve component 7005, and a pilot valve spring 7006. The steel ball 7004 is placed in the ball seat 7003 and can roll freely. The ball seat 7003 is installed in the valve seat 7002. A guide hole 7003.1 is provided at the center of the bottom of the ball seat 7003. One end of the pilot valve component 7005 is placed inside the bottom of the valve seat 7002, and the other end can pass through the guide hole 7003.1. One end of the pilot valve spring 7006 is placed inside the pilot valve component 7005, and the other end is connected to the valve seat 7002. A low-pressure safety valve spring 7007 is sleeved outside the low-pressure safety valve 7001. A first pilot hole 7001.1 is provided at the center of the bottom of the low-pressure safety valve 7001, and a second pilot hole 7002.1 is provided at the center of the bottom of the valve seat 7002. One end of the valve cover 4 is placed above the low-pressure safety valve component 7 and connected to the valve seat 7002, and the low-pressure safety valve 7001, the valve seat 7002, the ball seat 7003, the steel ball 7004, the pilot valve component 7005, and the pilot valve spring 7006 are placed on one side inside the first cavity 3001. The steel ball 7004 rolls in the ball seat 7003 to control the opening and closing of the guide hole 7003.1 by the pilot valve component 7005. The high-pressure safety valve component 6 includes a high-pressure safety valve 6001 and a high-pressure safety valve spring 6002 sleeved outside it, which are placed on the other side inside the first cavity 3001. A first through hole 2002 is provided at the connection between the valve seat 2 and the high-pressure safety valve component 6, and a second through hole 2003 is provided at the connection between the valve seat 2 and the low-pressure safety valve component 7. The anti-negative pressure safety valve component 8 is connected to the valve seat 2 while avoiding the first through hole 2002 and the second through hole 2003 and is placed inside the lower housing 1. There are two groups of the anti-negative pressure safety valve component 8 before and after, including an anti-vacuum valve 8001 and an anti-vacuum spring 8002 provided outside it. The other end of the valve cover 4 is threadedly connected to a pipe joint 9. A first channel 4001 is provided inside the valve cover 4 and communicates with the first cavity 3001. The valve cover 4 and the valve seat 7002 are fixedly connected by a countersunk head screw 10.

[0039] The contact angle between the ball seat 7003 and the steel ball 7004 is 15°, and the steel ball 7004 can roll freely on the ball seat 7003. When placed vertically, the steel ball 7004 presses down the pilot valve assembly 7005, and the gas in the inner cavity of the low-pressure safety valve assembly 7 can be depressurized through the pilot hole 1 7001.1 and the guide hole 2 7002.1. When the product is tilted more than 15°, after the steel ball 7004 rolls, the pilot valve assembly 7005 fits with the ball seat 7003 under the action of the pilot valve spring 7006, closing the guide hole 7003.1

[0040] A filter screen 7008 is fixedly installed at the bottom of the low-pressure safety valve assembly 7 by means of a screw 7009. A filter screen 9003 is arranged between the valve cover 4 and the pipe joint 9, and an elastic retaining ring 9002 is arranged between the filter screen 9003 and the pipe joint 9. A boss is arranged outside the middle of the pipe joint 9 to abut against the end of the valve cover 4, and a sealing ring 9001 is arranged at the connection between the inner side of the end of the valve cover 4 and the pipe joint 9.

[0041] A sealing ring 2 7010 is provided at the connection between the low-pressure safety valve assembly 7 and the valve seat 2, a sealing ring 3 7011 is provided at the connection between the low-pressure safety valve 7001 and the upper shell 3, a sealing ring 4 6004 is provided at the connection between the high-pressure safety valve assembly 6 and the valve seat 2, and a sealing ring 5 6003 is provided at the contact between the high-pressure safety valve spring 6002 and the upper shell 3. A gasket 2001 is provided at the connection between the screw 5 connecting the lower shell 1, the valve seat 2 and the upper shell 3. A sealing ring 10 8003 is provided at the connection between the anti-vacuum valve 8001 and the lower shell 1, a sealing ring 11 8004 is provided at the connection between the bottom end of the anti-vacuum spring 8002 and the lower shell 1, and a sealing ring 12 8005 is provided at the connection between the anti-vacuum valve 8001 and the valve seat 2.

[0042] When the gas pressure in the fuel tank rises to the opening pressure of the low-pressure safety valve 7001, the low-pressure safety valve 7001 opens to release the pressure. When the pressure is too high, reaching the opening pressure of the high-pressure safety valve 6001, the high-pressure safety valve 6001 opens to release the pressure, ensuring that the pressure in the fuel tank is not over-pressurized, thereby ensuring the safety of the fuel tank.

[0043] The steel ball 7004 is placed in the inner cavity of the low-pressure safety valve assembly 7, making full use of the internal structural space of the product. In order to prevent the fuel from overflowing from the low-pressure safety valve when the aircraft is flying in an attitude flight such as nose-down flight, side tilt flight or nose-up flight, it is necessary to increase the opening pressure of the low-pressure safety valve. During attitude flight, the low-pressure safety valve will not open and leak oil.

[0044] like Figure 6As shown, when the aircraft is flying straight, the steel ball 7004 presses down the pilot valve assembly 7005, and the guiding hole 7003.1 of the ball seat 7003 opens. The gas passes through the low-pressure safety valve pilot hole one 7001.1 - the valve seat pilot hole two 7002.1 → the pilot valve assembly pilot hole three 7005.1 → the ball seat guiding hole 7003.1 - the valve cover passage one 4001 and is discharged to the atmosphere. At this time, the internal cavity pressure of the low-pressure safety valve is the atmospheric pressure, and the opening pressure of the low-pressure safety valve is P1.

[0045] As Figure 7 shown, when the aircraft is performing attitude flights such as nose-down flight, side-tilt flight, or nose-up flight, after the steel ball 7004 rolls, the pilot valve assembly 7005 originally pressed by the steel ball 7004 is bounced up by the pilot valve spring 7006 and pressed tightly on the ball seat 7003, and the pilot valve assembly 7005 closes the guiding hole 7003.1 of the ball seat 7003. The gas enters the internal cavity of the low-pressure safety valve assembly through the low-pressure safety valve pilot hole one 7001.1, and a back pressure P back pressure is established in the internal cavity of the low-pressure safety valve assembly. At this time, the opening pressure P1' of the low-pressure safety valve needs to increase by the pressure of the back pressure P back pressure, which is higher than P1. It can achieve the purpose that the low-pressure safety valve will not open and leak oil when the aircraft is performing attitude flights such as nose-down flight, side-tilt flight, or nose-up flight.

[0046] When the aircraft returns to the straight flight from attitude flights such as nose-down flight, side-tilt flight, or nose-up flight, the pilot valve assembly 7005 pressed down by the rolling of the steel ball 7004, and the guiding hole 7003.1 of the ball seat 7003 opens. The gas passes through the low-pressure safety valve pilot hole one 7001.1 → the valve seat pilot hole two 7002.1 → the pilot valve assembly pilot hole three 7005.1 → the ball seat guiding hole 7003.1 → the valve cover passage one 4001 and is discharged to the atmosphere. At this time, the internal cavity pressure of the low-pressure safety valve is the atmospheric pressure, and the opening pressure of the low-pressure safety valve is restored to P1.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Any modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, are all covered within the scope of the claims of the present invention.

Claims

1. A steel ball valve core type pressure regulating component, characterized in that: It includes a lower housing (1), an upper housing (3), a valve seat (2), a high-pressure safety valve assembly (6), a low-pressure safety valve assembly (7), a negative-pressure prevention safety valve assembly (8), and a valve cover (4) installed on the valve seat (2). The valve seat (2) is placed between the lower housing (1) and the upper housing (3) and fixedly connected by screw one (5). The valve seat (2) and the upper housing (3) form a first cavity (3001), and the valve seat (2) and the lower housing (1) form a second cavity (1001). One side of the lower housing (1) is provided with an inlet one (C), and the bottom is provided with an inlet two (D). On both sides of the upper housing (3), an outlet one (A) and an outlet two (B) are respectively arranged. The low-pressure safety valve assembly (7) includes a low-pressure safety valve (7001), and its inner cavity integrates a valve seat (7002), a ball seat (7003), a steel ball (7004), a pilot valve assembly (7005), and a pilot valve spring (7006). The steel ball (7004) is placed in the ball seat (7003) and can roll freely. The ball seat (7003) is installed in the valve seat (7002). A guide hole (7003.1) is provided at the center of the bottom of the ball seat (7003). One end of the pilot valve assembly (7005) is placed inside the bottom of the valve seat (7002), and the other end can pass through the guide hole (7003.1). One end of the pilot valve spring (7006) is placed inside the pilot valve assembly (7005), and the other end is connected to the valve seat (7002). A low-pressure safety valve spring (7007) is sleeved outside the low-pressure safety valve (7001). A first pilot hole (7001.1) is provided at the center of the bottom of the low-pressure safety valve (7001), and a second pilot hole (7002.1), one end of the valve cover (4) is placed above the low-pressure safety valve assembly (7) and connected to the valve seat (7002), and the low-pressure safety valve (7001), valve seat (7002), ball seat (7003), steel ball (7004), pilot valve assembly (7005) and pilot valve spring (7006) are placed on one side inside the first cavity (3001). The steel ball (7004) rolls inside the ball seat (7003) to control the opening and closing of the pilot valve assembly (7005). The high-pressure safety valve assembly (6) includes a high-pressure safety valve (6001) and a high-pressure safety valve spring (6002) sleeved outside it, which are placed on the other side inside the first cavity (3001). A through hole one (2002) is provided at the connection between the valve seat (2) and the high-pressure safety valve assembly (6), and a through hole two (2003) is provided at the connection between the valve seat (2) and the low-pressure safety valve assembly (7). The anti-negative pressure safety valve assembly (8) is connected to the valve seat (2) while avoiding the through hole one (2002) and the through hole two (2003) and is placed inside the lower housing (1). There are two groups of the anti-negative pressure safety valve assembly (8) before and after, including an anti-vacuum valve (8001) and an anti-vacuum spring (8002) arranged outside it. The other end of the valve cover (4) is threadedly connected to the pipe joint (9). A channel one (4001) is provided inside the valve cover (4) and is communicated with the first cavity (3001).

2. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: The contact surface of the ball seat (7003) and the steel ball (7004) has an inclination angle of 15°. The steel ball (7004) can roll freely on the ball seat (7003). When placed vertically, the steel ball (7004) presses down the pilot valve assembly (7005), and the gas in the inner cavity of the low-pressure safety valve assembly (7) can be depressurized through the pilot hole 1 (7001.1) and the guide hole 2 (7002.1). When the product is inclined by more than 15°, after the steel ball (7004) rolls, the pilot valve assembly (7005) fits with the ball seat (7003) under the action of the pilot valve spring (7006), and closes the guide hole (7003.1).

3. The steel ball valve core type pressure regulating assembly according to claim 1, characterized in that: A filter screen (7008) is fixedly mounted on the bottom of the low-pressure safety valve assembly (7) by means of a screw (7009).

4. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: A second filter screen (9003) is provided between the valve cover (4) and the pipe joint (9), an elastic retaining ring (9002) is provided between the second filter screen (9003) and the pipe joint (9), a boss is provided on the outer side of the middle part of the pipe joint (9) to abut against the end of the valve cover (4), and a sealing ring (9001) is provided at the connection between the inner side of the end of the valve cover (4) and the pipe joint (9).

5. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: A second sealing ring (7010) is provided at the connection between the low-pressure safety valve assembly (7) and the valve seat (2), a third sealing ring (7011) is provided at the connection between the low-pressure safety valve (7001) and the upper shell (3), a fourth sealing ring (6004) is provided at the connection between the high-pressure safety valve assembly (6) and the valve seat (2), and a sealing ring (6003) is provided at the contact between the high-pressure safety valve spring (6002) and the upper shell (3).

6. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: A sealing ring six (7012) is installed at the connection between the upper shell (3) and the valve seat (7002), a sealing ring seven (7013) is installed at the connection between the valve seat (7002) and the valve cover (4), a sealing ring eight (7014) is installed at the connection between the ball seat (7003) and the valve seat (7002), and a sealing ring nine (7015) is installed at the connection between the valve cover (4) and the valve seat (7002).

7. The pressure regulating assembly with a steel ball valve core according to claim 1, wherein: A washer (2001) is provided at the connection point where the screw (5) connects the lower shell (1), the valve seat (2) and the upper shell (3).

8. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: A sealing ring ten (8003) is provided at the connection between the anti-vacuum valve (8001) and the lower shell (1), a sealing ring eleven (8004) is provided at the connection between the bottom end of the anti-vacuum spring (8002) and the lower shell (1), and a sealing ring twelve (8005) is provided at the connection between the anti-vacuum valve (8001) and the valve seat (2).

9. The steel ball valve core type pressure regulating assembly according to claim 1, wherein: The valve cover (4) and the valve seat (7002) are fixedly connected via countersunk screws (10).

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