An ultra-high pressure large diameter quick opening control device

Abstract

The present invention belongs to the field of pneumatic control technology and discloses an ultra-high pressure large-diameter quick-opening control device, which includes a main valve, a pressure-starting valve and a constant-ratio pressure-reducing valve, wherein the main valve is fixed by a pressure-bearing end cover, includes a main valve body, a main valve core, a main valve spring and a bushing, and is processed with an inlet cavity, a control cavity and a back pressure cavity; the pressure-starting valve and the constant-ratio pressure-reducing valve are respectively inserted as a whole into the upper inner cavity and the lower inner cavity of the main valve core, and different flow channels are respectively processed between the inlet cavity and the constant-ratio pressure-reducing valve, between the constant-ratio pressure-reducing valve and the back pressure cavity, between the inlet cavity and the pressure-starting valve, and between the pressure-starting valve and the control cavity. Through the present invention, not only can it be reliably sealed before the intake pressure is lower than the set opening pressure, but it can also realize automatic and rapid opening and release of ultra-high pressure gas when the set pressure is reached, and it also meets multiple performance index requirements such as ultra-high pressure resistance (350MPa), large diameter (DN85) and fast opening action (5ms).

Description

Technical Field

[0001] The present invention belongs to the field of pneumatic control technology, and more specifically, relates to an ultra-high pressure large-diameter quick-opening control device. Background Art

[0002] Pneumatic technology is widely used in various fields, including machinery manufacturing, shipbuilding, and aerospace, due to its low cost, pollution-free operation, rapid operation, and ease of operation. Ultra-high-pressure, large-diameter, quick-opening control devices are core control components in high-power pneumatic systems. They primarily control opening and closing through their own pressure, thereby rapidly connecting or disconnecting the medium in the pipeline. Their large diameter allows for a wide range of pressure and temperature applications.

[0003] However, further research shows that the working pressure of the quick-opening valve in the existing technology usually does not exceed 100MPa, and it is mainly opened and closed by solenoid valves, hydraulics and puncturing the diaphragm. It usually requires an external device to apply driving force, and the opening and closing time is long. It is difficult to meet the ultra-high pressure, self-pressure controlled opening and rapid opening performance required by the quick-opening device in a certain high-power pneumatic system. Summary of the Invention

[0004] In response to one or more of the above-mentioned defects or needs in the prior art, the present invention provides an ultra-high pressure large-diameter quick-opening control device, wherein by studying and improving its overall structural composition, the arrangement mode of multiple key components, and the working mechanism, a new type of quick-opening control device with a compact structure and easy operation can be obtained. The device can not only reliably seal before the intake pressure is lower than the set opening pressure, but also realize automatic and rapid opening and release of ultra-high pressure gas when the set pressure is reached, and the opening pressure can be precisely adjusted. At the same time, it also meets multiple performance index requirements such as ultra-high pressure resistance (350MPa), large diameter (DN85) and fast opening action (5ms).

[0005] To achieve the above object, according to the present invention, there is provided an ultra-high pressure large-diameter quick-opening control device, characterized in that the quick-opening control device comprises a main valve, a pressure-starting valve and a constant-ratio pressure reducing valve, wherein:

[0006] The main valve as a whole is a plug-in structure and can be inserted into an external cylindrical shell. The main valve is fixed by a pressure-bearing end cover and includes a main valve body, a main valve core and a main valve spring, wherein the upper and lower ends of the main valve body are respectively provided with a main valve upper end cover and a main valve lower end cover, and a bushing is provided in an annular manner on the inner side surface; the main valve core is installed in the main valve body and can move along the axial direction, and a main valve core end cover is provided at its lower end; one end of the main valve spring abuts the pressure-bearing end cover, and the other end abuts the main valve core to maintain a seal with the valve seat; in addition, an inlet cavity is processed at the lower part of the main valve body, a control cavity is processed between the main valve core and the bushing, and a back pressure cavity is processed between the main valve core and the main valve upper end cover;

[0007] The pressure-activated valve is integrally inserted into the upper inner cavity of the main valve core, and comprises a pressure-activated valve body, an upper valve core of the pressure-activated valve, a lower valve core of the pressure-activated valve, and a pressure-activated valve spring, wherein the pressure-activated valve body is fixedly connected to the main valve core; the upper valve core of the pressure-activated valve and the lower valve core of the pressure-activated valve are connected to each other and are installed in the pressure-activated valve body and can move axially; one end of the pressure-activated valve spring abuts against the pressure-activated valve spring compression sleeve, and the other end abuts against the pressure-activated valve upper valve core, and the pressure-activated valve spring compression sleeve is fixedly connected to the pressure-activated valve body;

[0008] The fixed ratio pressure reducing valve is integrally inserted into the lower inner cavity of the main valve core and abuts against the main valve core end cover, and comprises a fixed ratio pressure reducing valve body, an upper valve core of the fixed ratio pressure reducing valve, a lower valve core of the fixed ratio pressure reducing valve and a fixed ratio pressure reducing valve spring, wherein the upper end cover of the fixed ratio pressure reducing valve and the lower end cover of the fixed ratio pressure reducing valve are respectively provided at the upper and lower ends of the fixed ratio pressure reducing valve body; the upper valve core of the fixed ratio pressure reducing valve and the lower valve core of the fixed ratio pressure reducing valve are connected to each other and installed in the interior of the fixed ratio pressure reducing valve body and can move axially; one end of the fixed ratio pressure reducing valve spring abuts against the upper valve core of the fixed ratio pressure reducing valve, and the other end abuts against the upper end cover of the fixed ratio pressure reducing valve;

[0009] In addition, a first flow channel is processed between the inlet cavity and the lower valve core of the constant ratio pressure reducing valve, a second flow channel is processed between the upper valve core of the constant ratio pressure reducing valve and the back pressure cavity, a third flow channel is processed between the inlet cavity and the lower valve core of the pressure start valve, and a fourth flow channel is processed between the lower valve core of the pressure start valve and the control cavity.

[0010] As a further preference of the present invention, for the main valve body, its main valve core end cover is preferably fixed to the main valve core by bolts; a bolt hole is opened inside the upper end cover of the main valve, and is fixed to the main valve body by bolts; a bolt hole is opened on the lower side of the lower end cover of the main valve, and is fixed to the main valve body by bolts.

[0011] As a further preference of the present invention, for the main valve body, a groove is provided on the inner side of the main valve upper end cover, and a Gly ring is embedded in it to seal with the main valve core; the upper end and the outer side of the main valve upper end cover are provided with grooves, which are respectively used to embed a sealing ring and a retaining ring; a groove is provided on the inner side of the bottom of the bushing for embedding a Y-shaped combination sealing ring to seal with the main valve core; a groove is provided on the outer side of the bushing for embedding a Y-shaped combination sealing ring to seal with the main valve body; a Y-shaped combination sealing ring is respectively embedded between the outer side of the main valve body and the main valve upper end cover and the main valve lower end cover, and a Y-shaped combination sealing ring is embedded on the outer side of the valve seat, thereby forming a seal with the main valve body; a groove is provided on the lower side of the main valve lower end cover for embedding a Y-shaped combination sealing ring.

[0012] As a further preference of the present invention, for the pressure-starting valve, its pressure-starting valve body and the main valve core are preferably connected and fixed by threads, the upper valve core of the pressure-starting valve and the lower valve core of the pressure-starting valve are preferably connected as a whole by threads, and the pressure-starting valve spring sleeve and the pressure-starting valve body are preferably connected by threads.

[0013] As a further preferred embodiment of the present invention, for the pressure-activated valve, a groove is provided on the outer side of the lower valve core of the pressure-activated valve for embedding a sealing ring and a retaining ring, thereby sealing with the valve body of the pressure-activated valve; a groove is provided on the outer side of the valve body of the pressure-activated valve for embedding a sealing ring and a retaining ring, and a groove is provided on its bottom for embedding an end Y-shaped sealing ring, thereby sealing with the main valve core.

[0014] As a further preference of the present invention, for the fixed ratio pressure reducing valve, the upper valve core of the fixed ratio pressure reducing valve and the lower valve core of the fixed ratio pressure reducing valve are preferably connected and fixed by threads; the upper end cover of the fixed ratio pressure reducing valve and the valve body of the fixed ratio pressure reducing valve are preferably connected by threads; the lower end cover of the fixed ratio pressure reducing valve is inserted into the valve body of the fixed ratio pressure reducing valve and is preferably fixed by bolts.

[0015] As a further preference of the present invention, for the fixed ratio pressure reducing valve, a fixed ratio pressure reducing valve sealing ring is embedded between the fixed ratio pressure reducing valve upper valve core and the fixed ratio pressure reducing valve lower valve core; a groove is provided on the outer side of the fixed ratio pressure reducing valve upper valve core for embedding a step seal and sealing with the fixed ratio pressure reducing valve valve body; a groove is provided on the upper part of the fixed ratio pressure reducing valve lower valve core for embedding a sealing ring, which is sealed with the fixed ratio pressure reducing valve upper valve core; a groove is provided on the outer side of the fixed ratio pressure reducing valve lower valve core for embedding a step seal, which is sealed with the fixed ratio pressure reducing valve lower end cover; a groove is provided on the upper part of the fixed ratio pressure reducing valve lower end cover for embedding a sealing ring and a retaining ring; a groove is provided on the outside of the fixed ratio pressure reducing valve valve body for embedding a sealing ring and a retaining ring, which is sealed with the main valve core.

[0016] As a further preferred embodiment of the present invention, the bottom of the main valve core is preferably a conical structure and is designed as an unbalanced structure, that is, when the above-mentioned quick-opening control device is not turned on, a seal is formed between the main valve core and the valve seat, and after the above-mentioned quick-opening control device is turned on, the main valve core and the valve seat are no longer sealed, and the pressure action area expands rapidly to achieve quick opening.

[0017] As a further preferred embodiment of the present invention, the quick-opening control device is suitable for ultra-high pressure of 0 to 350 MPa and operating temperature of -20°C to 200°C.

[0018] As a further preferred embodiment of the present invention, the maximum nominal diameter of the valve element in the quick-opening control device is DN85, and the opening action is controlled within 5ms.

[0019] In general, the above technical solutions conceived by the present invention have the following technical advantages compared with the existing technology:

[0020] (1) The present invention fully combines the working characteristics and special needs of ultra-high pressure large-diameter quick-opening control, and through research and improvement of its overall structural composition and specific setting methods, a new type of quick-opening control device can be obtained, which can not only reliably seal before the intake pressure is lower than the set opening pressure, but also realize automatic and rapid opening and release of ultra-high pressure gas when the set pressure is reached, and the opening pressure can be accurately adjusted;

[0021] (2) Specifically, before the quick-opening control device of the present invention is opened, the ultra-high-pressure gas reaches the back-pressure chamber through the constant-ratio pressure reducing valve, and the pressure in the back-pressure chamber increases with the increase of the intake pressure, providing a sealing force that changes with the opening pressure, thereby ensuring a reliable seal before the quick-opening control device is opened; and after opening, the pressure-starting valve plays a leading role, indirectly controlling the action of the main valve with a large diameter through the pressure-starting valve with a small diameter, reducing the spring force, and facilitating the precise setting of the opening pressure of the ultra-high-pressure quick-opening control device, thereby realizing the automatic and rapid opening action of the pressure control, without the need for an external device to apply a driving force; in addition, since the main valve adopts an unbalanced structure, the pressure action area on the main valve core can be rapidly expanded, and quick opening can be achieved; at the same time, the back-pressure chamber is connected to the outside world, and the gas in the back-pressure chamber is discharged in time, reducing the pressure in the back-pressure chamber, and further improving the opening speed of the quick-opening control device;

[0022] (3) The quick-opening control device of the present invention has a compact overall structure and is easy to operate. It is highly applicable to various complex working conditions and effectively meets multiple performance index requirements such as ultra-high pressure resistance (350MPa), large diameter (DN85) and fast opening action (5ms). Therefore, it has good practical value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the overall structure of the ultra-high pressure large-diameter quick-opening control device provided in the preferred embodiment of the present application;

[0024] Figure 2a and 2b They are Figure 1 A top view and a front cross-sectional view of the bushing shown in ;

[0025] Figure 3a and 3b They are Figure 1 A top view and a front cross-sectional view of the main valve upper end cover are shown in FIG;

[0026] Figure 4a and 4b They are Figure 1 The bottom view and front cross-sectional view of the main valve core shown in FIG;

[0027] Figure 5a and 5b They are Figure 1 The top view and front cross-sectional view of the main valve seat shown in ;

[0028] Figure 6a and 6b They are Figure 1 The bottom view and front cross-sectional view of the main valve body shown in FIG;

[0029] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0030] 1-pressure-bearing end cover; 2-main valve upper end cover; 3-main valve spring; 4-main valve body; 5-main valve core; 6-pressure-start valve spring sleeve; 7-pressure-start valve body; 8-pressure-start valve spring; 9-pressure-start valve upper valve core; 10-pressure-start valve lower valve core; 11-bushing; 12-constant ratio pressure reducing valve upper end cover; 13-constant ratio pressure reducing valve spring; 14-constant ratio pressure reducing valve body; 15-constant ratio pressure reducing valve upper valve core; 16-constant ratio pressure reducing valve sealing ring; 17-constant ratio pressure reducing valve lower valve core; 18-constant ratio pressure reducing valve lower end cover; 19-main valve core end cover; 20-valve seat; 21-main valve lower end cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0033] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0036] Figure 1 This is a schematic diagram of the overall structure of the ultra-high pressure large diameter quick opening control device provided by the preferred embodiment of this application. Figure 1 The present invention will be explained in more detail.

[0037] Reference Figure 1The ultra-high pressure large-diameter quick-opening control device of the present invention mainly includes components such as a main valve, a pressure-starting valve and a constant-ratio pressure reducing valve. At the same time, multiple internal chambers and multiple flow channels are designed in a targeted manner. It is expected to achieve a reliable seal before the intake pressure is lower than the set opening pressure, and when the set pressure is reached, the main technical effect of automatically and quickly opening and releasing ultra-high pressure gas can be achieved.

[0038] See also Figure 2a 、 2b , 3a, 3b, 4a, 4b, 5a, 5b, 6a and 6b, the main valve as a whole is a plug-in structure and can be inserted into the external cylindrical shell; the main valve is fixed by the pressure-bearing end cover 1, and includes a main valve body 4, a main valve core 5 and a main valve spring 3, etc., wherein the upper and lower ends of the main valve body 4 are respectively provided with a main valve upper end cover 2 and a main valve lower end cover 21, and a bushing 11 is provided in an annular manner on the inner side; the main valve core 5 is installed in the main valve body 4 and can be moved along the axis The main valve body 4 is provided with a main valve core end cover 19 at its lower end; one end of the main valve spring 3 abuts the pressure-bearing end cover 1, and the other end abuts the main valve core 5 to maintain a seal with the valve seat 20; in addition, the lower part of the main valve body 4 is processed with an inlet cavity A, a control cavity B is processed between the main valve core 5 and the bushing 11, and a back pressure cavity C is processed between the main valve core (5) and the main valve upper end cover 2; in addition, the back pressure cavity C can also be processed with a pressure detection hole.

[0039] More specifically, the main valve core end cover 19 and the main valve core 5 can be fixed by bolts, for example; a bolt hole is opened inside the main valve upper end cover 2, and is fixed to the main valve body 4 by bolts; a bolt hole is opened on the lower side of the main valve lower end cover 21, and is fixed to the main valve body 4 by bolts.

[0040] In addition, a groove may be opened on the inner side of the main valve upper end cover 2, and a Gly ring may be embedded to seal with the main valve core 5. The upper end and outer side of the main valve upper end cover 2 are opened with grooves, which are used to embed a sealing ring and a retaining ring respectively; a groove is opened on the inner side of the bottom of the bushing 11 for embedding a Y-shaped combination sealing ring to seal with the main valve core 5, and a groove is opened on the outer side of the bushing 11 for embedding a Y-shaped combination sealing ring to seal with the main valve body 4; a Y-shaped combination sealing ring is respectively embedded between the outer side of the main valve body 4 and the main valve upper end cover 2 and the main valve lower end cover 21, and a Y-shaped combination sealing ring is embedded on the outer side of the valve seat 20, thereby forming a seal with the main valve body 4; a groove is opened on the lower side of the main valve lower end cover 21 for embedding a Y-shaped combination sealing ring.

[0041] As for the pressure-starting valve, it is integrally inserted into the upper inner cavity of the main valve core 5, and includes a pressure-starting valve body 7, a pressure-starting valve upper valve core 9, a pressure-starting valve lower valve core 10 and a pressure-starting valve spring 8, etc., wherein the pressure-starting valve body 7 is fixedly connected to the main valve core 5; the pressure-starting valve upper valve core 9 and the pressure-starting valve lower valve core 10 are connected to each other and installed in the pressure-starting valve body 7 and can move axially; one end of the pressure-starting valve spring 8 abuts against the pressure-starting valve spring compression sleeve 6, and the other end abuts against the pressure-starting valve upper valve core 9, and the pressure-starting valve spring compression sleeve 6 is fixedly connected to the pressure-starting valve body 7.

[0042] More specifically, the pressure-starting valve body 7 and the main valve core 5 can be connected and fixed by threads, for example, the pressure-starting valve upper valve core 9 and the pressure-starting valve lower valve core 10 are preferably connected as a whole by threads, and the pressure-starting valve spring sleeve 6 and the pressure-starting valve body 7 are preferably connected by threads.

[0043] In addition, a groove is opened on the outside of the lower valve core 10 of the pressure-activated valve for embedding a sealing ring and a retaining ring, thereby sealing with the pressure-activated valve body 7; a groove is opened on the outside of the pressure-activated valve body 7 for embedding a sealing ring and a retaining ring, and a groove is opened at its bottom for embedding an end Y-shaped sealing ring, thereby sealing with the main valve core 5.

[0044] As for the constant ratio pressure reducing valve, it is integrally inserted into the lower inner cavity of the main valve core 5 and abuts against the main valve core end cover 19, and includes a constant ratio pressure reducing valve body 14, a constant ratio pressure reducing valve upper valve core 15, a constant ratio pressure reducing valve lower valve core 17 and a constant ratio pressure reducing valve spring 13, wherein the upper and lower ends of the constant ratio pressure reducing valve body 14 are respectively provided with a constant ratio pressure reducing valve upper end cover 12 and a constant ratio pressure reducing valve lower end cover 18; the constant ratio pressure reducing valve upper valve core 15 and the constant ratio pressure reducing valve lower valve core 17 are connected to each other and installed inside the constant ratio pressure reducing valve body 14 and can move axially; one end of the constant ratio pressure reducing valve spring 13 abuts against the constant ratio pressure reducing valve upper valve core 15, and the other end abuts against the constant ratio pressure reducing valve upper end cover 12.

[0045] More specifically, the upper valve core 15 of the constant ratio pressure reducing valve and the lower valve core 17 of the constant ratio pressure reducing valve can be connected and fixed by threads, for example; the upper end cover 12 of the constant ratio pressure reducing valve and the valve body 14 of the constant ratio pressure reducing valve are preferably connected by threads; the lower end cover 18 of the constant ratio pressure reducing valve is inserted into the valve body 14 of the constant ratio pressure reducing valve and is preferably fixed by bolts.

[0046] In addition, a fixed ratio pressure reducing valve sealing ring 16 is embedded between the fixed ratio pressure reducing valve upper valve core 15 and the fixed ratio pressure reducing valve lower valve core 17; a groove is provided on the outer side of the fixed ratio pressure reducing valve upper valve core 15 for embedding a step seal and sealing with the fixed ratio pressure reducing valve valve body 20; a groove is provided on the upper part of the fixed ratio pressure reducing valve lower valve core 17 for embedding a sealing ring, which is sealed with the fixed ratio pressure reducing valve upper valve core 15; a groove is provided on the outer side of the fixed ratio pressure reducing valve lower valve core 17 for embedding a step seal and sealing with the fixed ratio pressure reducing valve lower end cover 18; a groove is provided on the upper part of the fixed ratio pressure reducing valve lower end cover 18 for embedding a sealing ring and a retaining ring; a groove is provided on the outside of the fixed ratio pressure reducing valve valve body 14 for embedding a sealing ring and a retaining ring, which is sealed with the main valve core 5.

[0047] In addition, a first flow channel a is processed between the inlet cavity A and the lower valve core 17 of the constant ratio pressure reducing valve, a second flow channel b is processed between the upper valve core 15 of the constant ratio pressure reducing valve and the back pressure chamber C, a third flow channel c is processed between the inlet cavity A and the lower valve core 10 of the pressure start valve, and a fourth flow channel d is processed between the lower valve core 10 of the pressure start valve and the control chamber B.

[0048] According to a preferred embodiment of the present invention, the bottom of the main valve core 5 is preferably a conical structure and is designed as an unbalanced structure, that is, when the above-mentioned quick-opening control device is not turned on, a seal is formed between the main valve core 5 and the valve seat, and after the above-mentioned quick-opening control device is turned on, the main valve core 5 and the valve seat 20 are no longer sealed, and the pressure action area expands rapidly to achieve quick opening.

[0049] The working principle of the ultra-high pressure large-diameter quick-opening control device according to the present invention will be explained in detail below.

[0050] In the initial state, the pressure-activated valve and main valve are closed by their respective spring forces, while the ratio-reducing valve is open by its spring force. The compression of the pressure-activated valve spring 8 can be adjusted by rotating the pressure-activated valve spring sleeve 6, thereby presetting the opening pressure of the pressure-activated valve (which also serves as the opening pressure of the quick-opening control device).

[0051] When the quick-opening control device according to the present invention is connected to an ultra-high-pressure gas source, the ultra-high-pressure gas first enters the inlet chamber A, enters the constant-ratio pressure reducing valve along the first flow path a, and after being reduced in pressure, enters the back-pressure chamber C along the second flow path b. Since the pressure of the back-pressure chamber C acts on the main valve core 5, a seal is formed between the main valve core 5 and the valve seat 20, and the ultra-high-pressure gas in the inlet chamber A cannot reach the outlet, thereby achieving reliable sealing of the quick-opening control device.

[0052] Next, when the pressure of the ultra-high pressure gas source increases to the opening pressure set by the above-mentioned quick-opening control device, under the action of the gas pressure, the upper and lower valve cores of the pressure-activated valve overcome the spring force of the pressure-activated valve spring 8 and move upward, the pressure-activated valve opens, and the ultra-high pressure gas enters the control chamber B from the inlet chamber A along the third flow channel c and the fourth flow channel d; because the pressure in the back-pressure chamber C is much lower than the pressure in the control chamber B, the main valve core 5, under the action of the pressure in the control chamber B, overcomes the pressure in the back-pressure chamber C and the spring force of the main valve spring 3 and moves upward, the main valve opens, and the main valve core 5 and the valve seat 20 are no longer sealed. The gas from the inlet chamber A reaches the outlet along the gap between the main valve core 5 and the valve seat 20, while acting on the main valve core 5;

[0053] Then, as the net effective area of ​​air pressure on the main valve core 5 increases, the main valve core 5 accelerates upward movement. As the main valve core 5 continues to move upward, it separates from the main valve upper end cover 2, and the gas in the back pressure chamber C directly enters the atmosphere. When the main valve core 5 contacts the main valve upper end cover 2, the main valve reaches its maximum opening.

[0054] In summary, the ultra-high pressure large-diameter quick-opening control device according to the present invention has a compact overall structure and is easy to operate. It can be used to realize automatic and rapid opening and release of ultra-high pressure gas under the set opening pressure, and effectively meets the performance indicators such as ultra-high pressure resistance (350MPa), self-pressure controlled opening, large diameter (DN85) and fast opening action (5ms). It also has the characteristics of reliable sealing before opening and precise setting of opening pressure. Therefore, it has achieved good results in terms of bearing pressure, flow rate and quick opening characteristics, and has good practical value and application prospects.

[0055] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An ultra-high pressure large-diameter quick-opening control device, characterized in that: The quick-opening control device includes a main valve, a pressure-activated valve, and a proportional pressure-reducing valve, wherein: The main valve as a whole is a plug-in structure and can be inserted into an external cylindrical shell. The main valve is fixed by a pressure-bearing end cover (1) and includes a main valve body (4), a main valve core (5) and a main valve spring (3), wherein the upper and lower ends of the main valve body (4) are respectively provided with a main valve upper end cover (2) and a main valve lower end cover (21), and a bushing (11) is provided in an annular manner on the inner side surface; the main valve core (5) is installed in the main valve body (4) and can move along the axial direction, and a main valve core end cover (19) is provided at its lower end; one end of the main valve spring (3) abuts the pressure-bearing end cover (1), and the other end abuts the main valve core (5) so that it maintains a seal with the valve seat (20); in addition, an inlet cavity (A) is processed at the lower part of the main valve body (4), a control cavity (B) is processed between the main valve core (5) and the bushing (11), and a back pressure cavity (C) is processed between the main valve core (5) and the main valve upper end cover (2); The pressure start valve is integrally inserted into the upper inner cavity of the main valve core (5), and comprises a pressure start valve body (7), an upper valve core (9) of the pressure start valve, a lower valve core (10) of the pressure start valve and a pressure start valve spring (8), wherein the pressure start valve body (7) is fixedly connected to the main valve core (5); the upper valve core (9) of the pressure start valve and the lower valve core (10) of the pressure start valve are connected to each other and installed in the pressure start valve body (7) and can move along the axial direction; one end of the pressure start valve spring abuts against the pressure start valve spring compression sleeve (6), and the other end abuts against the upper valve core (9) of the pressure start valve, and the pressure start valve spring compression sleeve (6) is fixedly connected to the pressure start valve body (7); The fixed ratio pressure reducing valve is integrally inserted into the lower inner cavity of the main valve core (5) and abuts against the main valve core end cover (19), and comprises a fixed ratio pressure reducing valve body (14), an upper valve core (15) of the fixed ratio pressure reducing valve, a lower valve core (17) of the fixed ratio pressure reducing valve and a fixed ratio pressure reducing valve spring (13), wherein the upper and lower ends of the fixed ratio pressure reducing valve body (14) are respectively provided with an upper end cover (12) of the fixed ratio pressure reducing valve and a lower end cover (18) of the fixed ratio pressure reducing valve; the upper valve core (15) of the fixed ratio pressure reducing valve and the lower valve core (17) of the fixed ratio pressure reducing valve are connected to each other and installed inside the fixed ratio pressure reducing valve body (14) and can move along the axial direction; one end of the fixed ratio pressure reducing valve spring (13) abuts against the upper valve core (15) of the fixed ratio pressure reducing valve, and the other end abuts against the upper end cover (12) of the fixed ratio pressure reducing valve; In addition, a first flow channel (a) is processed between the inlet chamber (A) and the lower valve core (17) of the constant ratio pressure reducing valve, a second flow channel (b) is processed between the upper valve core (15) of the constant ratio pressure reducing valve and the back pressure chamber (C), a third flow channel (c) is processed between the inlet chamber (A) and the lower valve core (10) of the pressure start valve, and a fourth flow channel (d) is processed between the lower valve core (10) of the pressure start valve and the control chamber (B).

2. The ultra-high pressure large-diameter quick-opening control device according to claim 1, characterized in that: As for the main valve body, its main valve core end cover (19) is fixed to the main valve core (5) by bolts; the main valve upper end cover (2) has a bolt hole opened inside and is fixed to the main valve body (4) by bolts; the main valve lower end cover (21) has a bolt hole opened on the lower side and is fixed to the main valve body (4) by bolts.

3. The ultra-high pressure large-diameter quick-opening control device according to claim 1 or 2, characterized in that: As for the main valve body, a groove is provided on the inner side of the main valve upper end cover (2), and a grid ring is embedded to seal with the main valve core (5). The upper end and outer side of the main valve upper end cover (2) are provided with grooves for embedding a sealing ring and a retaining ring respectively; a groove is provided on the inner side of the bottom of the bushing (11) for embedding a Y-shaped combined sealing ring to seal with the main valve core (5), and a groove is provided on the outer side of the bushing (11) for embedding a Y-shaped combined sealing ring to seal with the main valve body (4); a Y-shaped combined sealing ring is embedded between the outer side of the main valve body (4) and the main valve upper end cover (2) and the main valve lower end cover (21), and a Y-shaped combined sealing ring is embedded on the outer side of the valve seat (20), thereby forming a seal with the main valve body (4); a groove is provided on the lower side of the main valve lower end cover (21) for embedding a Y-shaped combined sealing ring.

4. The ultra-high pressure large-diameter quick-opening control device according to claim 3, characterized in that: For the pressure start valve, the pressure start valve body (7) and the main valve core (5) are connected and fixed by threads, the pressure start valve upper valve core (9) and the pressure start valve lower valve core (10) are connected as a whole by threads, and the pressure start valve spring sleeve (6) and the pressure start valve body (7) are connected by threads.

5. The ultra-high pressure large-diameter quick-opening control device according to claim 4, characterized in that: For the pressure-activated valve, a groove is provided on the outer side of the lower valve core (10) of the pressure-activated valve for embedding a sealing ring and a retaining ring, thereby sealing with the valve body (7) of the pressure-activated valve; a groove is provided on the outer side of the valve body (7) of the pressure-activated valve for embedding a sealing ring and a retaining ring, and a groove is provided on the bottom thereof for embedding an end Y-shaped sealing ring, thereby sealing with the main valve core (5).

6. The ultra-high pressure large-diameter quick-opening control device according to claim 5, characterized in that: For the fixed ratio pressure reducing valve, the fixed ratio pressure reducing valve upper valve core (15) and the fixed ratio pressure reducing valve lower valve core (17) are connected and fixed by threads; the fixed ratio pressure reducing valve upper end cover (12) and the fixed ratio pressure reducing valve body (14) are connected by threads; the fixed ratio pressure reducing valve lower end cover (18) is inserted into the fixed ratio pressure reducing valve body (14) and fixed by bolts.

7. The ultra-high pressure large-diameter quick-opening control device according to claim 6, characterized in that: For the fixed ratio pressure reducing valve, a fixed ratio pressure reducing valve sealing ring (16) is embedded between the fixed ratio pressure reducing valve upper valve core (15) and the fixed ratio pressure reducing valve lower valve core (17); a groove is provided on the outer side of the fixed ratio pressure reducing valve upper valve core (15) for embedding a step seal and sealing with the fixed ratio pressure reducing valve body (14); a groove is provided on the upper part of the fixed ratio pressure reducing valve lower valve core (17) for embedding a sealing ring and sealing with the fixed ratio pressure reducing valve upper valve core (15); a groove is provided on the outer side of the fixed ratio pressure reducing valve lower valve core (17) for embedding a step seal and sealing with the fixed ratio pressure reducing valve lower end cover (18); a groove is provided on the upper part of the fixed ratio pressure reducing valve lower end cover (18) for embedding a sealing ring and a retaining ring; a groove is provided on the outer side of the fixed ratio pressure reducing valve body (14) for embedding a sealing ring and a retaining ring and sealing with the main valve core (5).

8. The ultra-high pressure large-diameter quick-opening control device according to claim 7, characterized in that: The bottom of the main valve core (5) is a conical structure and is designed as an unbalanced structure, that is, when the above-mentioned quick-opening control device is not turned on, a seal is formed between the main valve core (5) and the valve seat, but after the above-mentioned quick-opening control device is turned on, the main valve core (5) and the valve seat (20) are no longer sealed, and the pressure acting area is accelerated to expand to achieve quick opening.

9. The ultra-high pressure large-diameter quick-opening control device according to claim 8, characterized in that: The quick-opening control device is suitable for ultra-high pressure of 0 to 350 MPa and operating temperature of -20°C to 200°C.

10. The ultra-high pressure large-diameter quick-opening control device according to claim 9, characterized in that: The maximum nominal diameter of the valve element in the quick-opening control device is DN85, and its opening action is controlled within 5ms.

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