Ultrahigh-pressure large-drift-diameter quick-opening control device

Abstract

The invention belongs to the related field of pneumatic control technology, and discloses an ultrahigh-pressure large-drift-diameter quick-opening control device which comprises a main valve, a pressure starting valve and a proportional pressure reducing valve, the main valve is pressed and fixed by a pressure-bearing end cover and comprises a main valve body, a main valve element, a main valve spring, a lining and the like, and an inlet cavity, a control cavity and a back pressure cavity are machined in the main valve; the pressure starting valve and the proportional pressure reducing valve are integrally inserted into an upper inner cavity and a lower inner cavity of the main valve element respectively, and meanwhile different flow channels are machined between the inlet cavity and the proportional pressure reducing valve, between the proportional 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 respectively. By means of the valve, reliable sealing can be achieved before the gas inlet pressure is lower than the set opening pressure, automatic and rapid opening and releasing of ultrahigh pressure gas can be achieved when the set pressure is reached, and meanwhile the requirements for multiple performance indexes such as ultrahigh pressure resistance (350 MPa), large drift diameter (DN85) and rapid opening action (5 ms) are met.

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 has the characteristics of low cost, no pollution, good speed and easy operation, so it is widely used in various fields such as machinery manufacturing, shipbuilding, aerospace, etc. The ultra-high pressure large-diameter fast-opening control device is the core control element in the high-power pneumatic system. It mainly controls the opening and closing of the medium in the pipeline through its own pressure control to achieve rapid connection or cutoff. It has a large diameter and is suitable for a wide pressure range and temperature range.

[0003] However, further research shows that the working pressure of the quick-opening valve in the prior art usually does not exceed 100MPa, and it is mainly opened and closed by solenoid valves, hydraulic pressure and puncturing the diaphragm. It usually requires an external device to apply a 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 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 and the arrangement and working mechanism of multiple key components, a new type of quick-opening control device with a compact structure and easy operation can be obtained, which can not only reliably seal before the intake pressure is lower than the set opening pressure, but also can 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, which 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 against the pressure-bearing end cover, and the other end abuts against the main valve core to keep it sealed 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 upper end cover of the main valve;

[0007] The pressure-actuated valve is integrally inserted into the upper inner cavity of the main valve core, and comprises a pressure-actuated valve body, an upper valve core of the pressure-actuated valve, a lower valve core of the pressure-actuated valve and a pressure-actuated valve spring, wherein the pressure-actuated valve body is fixedly connected to the main valve core; the upper valve core of the pressure-actuated valve and the lower valve core of the pressure-actuated valve are connected to each other and installed in the pressure-actuated valve body and can move axially; one end of the pressure-actuated valve spring abuts against the pressure-actuated valve spring compression sleeve, and the other end abuts against the upper valve core of the pressure-actuated valve, and the pressure-actuated valve spring compression sleeve is fixedly connected to the pressure-actuated 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 end cover of the main valve core, 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 an upper end cover of the fixed ratio pressure reducing valve and a lower end cover of the fixed ratio pressure reducing valve are respectively arranged 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 inside the valve body of the fixed ratio pressure reducing valve and can move along the axial direction; 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 formed between the inlet chamber and the lower valve core of the constant ratio pressure reducing valve, a second flow channel is formed between the upper valve core of the constant ratio pressure reducing valve and the back pressure chamber, a third flow channel is formed between the inlet chamber and the lower valve core of the pressure start valve, and a fourth flow channel is formed between the lower valve core of the pressure start valve and the control chamber.

[0010] As a further preferred embodiment 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 main valve upper end cover, and is fixed to the main valve body by bolts; a bolt hole is opened on the lower side of the main valve lower end cover, and is fixed to the main valve body by bolts.

[0011] As a further preferred embodiment 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 to seal the main valve core; grooves are provided on the upper end and outer side of the main valve upper end cover, 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, which is used to embed a Y-shaped combination sealing ring to seal the main valve core; a groove is provided on the outer side of the bushing, which is used to embed a Y-shaped combination sealing ring to seal the main valve body; Y-shaped combination sealing rings are 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, which is used to embed 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-actuated valve, a groove is provided on the outer side of the lower valve core of the pressure-actuated valve for embedding a sealing ring and a retaining ring, thereby sealing with the valve body of the pressure-actuated valve; a groove is provided on the outer side of the valve body of the pressure-actuated valve for embedding a sealing ring and a retaining ring, and a groove is provided at the 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 preferred embodiment of the present invention, for the fixed ratio pressure reducing valve, a fixed ratio pressure reducing valve sealing ring is embedded between the upper valve core of the fixed ratio pressure reducing valve and the lower valve core of the fixed ratio pressure reducing valve; a groove is provided on the outer side of the upper valve core of the fixed ratio pressure reducing valve for embedding a Step seal and sealing with the valve body of the fixed ratio pressure reducing valve; a groove is provided on the upper part of the lower valve core of the fixed ratio pressure reducing valve for embedding a sealing ring, which is sealed with the upper valve core of the fixed ratio pressure reducing valve; a groove is provided on the outer side of the lower valve core of the fixed ratio pressure reducing valve for embedding a Step seal, which is sealed with the lower end cover of the fixed ratio pressure reducing valve; a groove is provided on the upper part of the lower end cover of the fixed ratio pressure reducing valve for embedding a sealing ring and a retaining ring; a groove is provided on the outside of the valve body of the fixed ratio pressure reducing valve 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 quick-opening control device is not turned on, a seal is formed between the main valve core and the valve seat, and after the 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 solution conceived by the present invention has the following technical advantages compared with the prior art:

[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 structure and specific setting mode, 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 can 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 start valve plays a leading role, indirectly controlling the action of the main valve with a large diameter through the small-diameter pressure start valve, reducing the spring force, facilitating the accurate setting of the opening pressure of the ultra-high pressure quick-opening control device, and realizing the automatic and rapid opening action of 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 realized; 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 adaptable to various complex working conditions and effectively meets multiple performance index requirements such as resistance to ultra-high pressure (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 1It 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 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 A top view and a front cross-sectional view of the main valve seat shown in ;

[0028] Figure 6a and 6b They are Figure 1 A bottom view and a 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-actuated valve spring sleeve; 7-pressure-actuated valve body; 8-pressure-actuated valve spring; 9-pressure-actuated valve upper valve core; 10-pressure-actuated valve lower valve core; 11-bushing; 12-fixed ratio pressure-reducing valve upper end cover; 13-fixed ratio pressure-reducing valve spring; 14-fixed ratio pressure-reducing valve body; 15-fixed ratio pressure-reducing valve upper valve core; 16-fixed ratio pressure-reducing valve sealing ring; 17-fixed ratio pressure-reducing valve lower valve core; 18-fixed 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 solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present 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 specific characteristics, numbers, operations, constituent elements, components or combinations 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] Figure 1 This is a schematic diagram of the overall structure of the ultra-high pressure large-diameter fast-opening control device provided by the preferred embodiment of the present application. Figure 1 To explain the present invention 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 the ultra-high pressure gas can be achieved.

[0038] Also see Figure 2a , 2b , 3a, 3b, 4a, 4b, 5a, 5b, 6a and 6b, the main valve as a whole is a plug-in structure, which can be plugged 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; 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 against the pressure-bearing end cover 1, and the other end abuts against the main valve core 5 to keep it sealed 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; 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 can be fixed to the main valve core 5 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 may be 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; 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, 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-actuated valve body 7 and the main valve core 5 can be connected and fixed by threads, for example, the pressure-actuated valve upper valve core 9 and the pressure-actuated valve lower valve core 10 are preferably connected as a whole by threads, and the pressure-actuated valve spring sleeve 6 and the pressure-actuated valve body 7 are preferably connected by threads.

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

[0044] As for the fixed 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 fixed ratio pressure reducing valve body 14, a fixed ratio pressure reducing valve upper valve core 15, a fixed ratio pressure reducing valve lower valve core 17 and a fixed ratio pressure reducing valve spring 13, wherein the fixed ratio pressure reducing valve upper end cover 12 and the fixed ratio pressure reducing valve lower end cover 18 are respectively arranged at the upper and lower ends of the fixed ratio pressure reducing valve body 14; the fixed ratio pressure reducing valve upper valve core 15 and the fixed ratio pressure reducing valve lower valve core 17 are connected to each other and installed inside the fixed ratio pressure reducing valve body 14 and can move axially; one end of the fixed ratio pressure reducing valve spring 13 abuts against the fixed ratio pressure reducing valve upper valve core 15, and the other end abuts against the fixed ratio pressure reducing valve upper end cover 12.

[0045] More specifically, 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 can be connected and fixed, for example, by threads; the upper end cover 12 of the fixed ratio pressure reducing valve and the valve body 14 of the fixed ratio pressure reducing valve are preferably connected by threads; the lower end cover 18 of the fixed ratio pressure reducing valve is inserted into the valve body 14 of the fixed 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 upper valve core 15 of the fixed ratio pressure reducing valve and the lower valve core 17 of the fixed ratio pressure reducing valve; a groove is opened on the outer side of the upper valve core 15 of the fixed ratio pressure reducing valve for embedding the Step seal and sealing with the valve body 20 of the fixed ratio pressure reducing valve; a groove is opened on the upper part of the lower valve core 17 of the fixed ratio pressure reducing valve for embedding the sealing ring, which is sealed with the upper valve core 15 of the fixed ratio pressure reducing valve; a groove is opened on the outer side of the lower valve core 17 of the fixed ratio pressure reducing valve for embedding the Step seal and sealing with the lower end cover 18 of the fixed ratio pressure reducing valve; a groove is opened on the upper part of the lower end cover 18 of the fixed ratio pressure reducing valve for embedding the sealing ring and the retaining ring; a groove is opened on the outside of the valve body 14 of the fixed ratio pressure reducing valve for embedding the sealing ring and the retaining ring, which is sealed with the main valve core 5.

[0047] In addition, a first flow channel a is formed between the inlet chamber A and the lower valve core 17 of the constant ratio pressure reducing valve, a second flow channel b is formed 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 formed between the inlet chamber A and the lower valve core 10 of the pressure start valve, and a fourth flow channel d is formed 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 start valve and the main valve are in a closed state under the action of their respective spring forces, and the constant ratio pressure reducing valve is in an open state under the action of the spring force. The compression amount of the pressure start valve spring 8 can be adjusted by rotating the pressure start valve spring compression sleeve 6, thereby presetting the opening pressure of the pressure start valve (which is also the opening pressure of the quick opening control device).

[0051] When the quick-opening control device of the present invention is connected to an ultra-high pressure gas source, the ultra-high pressure gas first enters the inlet cavity A, enters the constant ratio pressure reducing valve along the first flow channel a, and enters the back pressure cavity C along the second flow channel b after being reduced in pressure; since the pressure of the back pressure cavity 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 cavity A cannot reach the outlet, thereby realizing 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-starting valve overcome the spring force of the pressure-starting valve spring 8 and move upward, the pressure-starting 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 of the back pressure chamber C is much lower than the pressure of the control chamber B, the main valve core 5 moves upward under the action of the pressure of the control chamber B, overcomes the pressure of the back pressure chamber C and the spring force of the main valve spring 3, the main valve opens, the main valve core 5 and the valve seat 20 are no longer sealed, and the gas in 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, due to the expansion of the net effective area of ​​the air pressure of the main valve core 5, the main valve core 5 will accelerate upward movement, and as the main valve core 5 continues to move upward, the main valve core 5 is separated 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 the 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 quick 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 will be easily understood by those skilled in the art that the above description 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 shall 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-starting valve and a ratio pressure reducing valve, wherein: The main valve as a whole is a plug-in structure and can be plugged into an external cylindrical housing. The main valve is fixed by a pressure-bearing end cover (1) and comprises a main valve body (4), a main valve core (5) and a main valve spring (3). 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. A main valve core end cover (19) is provided at the lower end of the main valve body (4); one end of the main valve spring (3) abuts against the pressure-bearing end cover (1), and the other end abuts against the main valve core (5) to keep it sealed with the valve seat (20); in addition, an inlet cavity (A) is machined at the lower part of the main valve body (4), a control cavity (B) is machined between the main valve core (5) and the bushing (11), and a back pressure cavity (C) is machined between the main valve core (5) and the main valve upper end cover (2); The pressure-actuated valve is integrally inserted into the upper inner cavity of the main valve core (5), and comprises a pressure-actuated valve body (7), an upper valve core (9) of the pressure-actuated valve, a lower valve core (10) of the pressure-actuated valve and a pressure-actuated valve spring (8), wherein the pressure-actuated valve body (7) is fixedly connected to the main valve core (5); the upper valve core (9) of the pressure-actuated valve and the lower valve core (10) of the pressure-actuated valve are connected to each other and installed in the pressure-actuated valve body (7) and can move axially; one end of the pressure-actuated valve spring abuts against the pressure-actuated valve spring compression sleeve (6), and the other end abuts against the upper valve core (9) of the pressure-actuated valve, and the pressure-actuated valve spring compression sleeve (6) is fixedly connected to the pressure-actuated 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 end cover (12) of the fixed ratio pressure reducing valve and the lower end cover (18) of the fixed ratio pressure reducing valve body (14) are respectively arranged at the upper and lower ends; 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 formed between the inlet chamber (A) and the lower valve core (17) of the constant ratio pressure reducing valve, a second flow channel (b) is formed 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 formed between the inlet chamber (A) and the lower valve core (10) of the pressure start valve, and a fourth flow channel (d) is formed 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: For the main valve body, its main valve core end cover (19) is preferably fixed to the main valve core (5) by bolts; the main valve upper end cover (2) has bolt holes inside and is fixed to the main valve body (4) by bolts; the main valve lower end cover (21) has bolt holes on its 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 Gly 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); 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), respectively, 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 any one of claims 1 to 3, characterized in that: For the pressure-actuated valve, the pressure-actuated valve body (7) and the main valve core (5) are preferably connected and fixed by threads, the upper valve core (9) and the lower valve core (10) of the pressure-actuated valve are preferably connected as a whole by threads, and the pressure-actuated valve spring sleeve (6) and the pressure-actuated valve body (7) are preferably connected by threads.

5. The ultra-high pressure large-diameter quick-opening control device according to any one of claims 1 to 4, characterized in that: For the pressure-actuated valve, a groove is provided on the outer side of the lower valve core (10) of the pressure-actuated valve for embedding a sealing ring and a retaining ring, thereby sealing with the valve body (7) of the pressure-actuated valve; a groove is provided on the outer side of the valve body (7) of the pressure-actuated valve for embedding a sealing ring and a retaining ring, and a groove is provided at the bottom 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 any one of claims 1 to 5, characterized in that: For 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 preferably connected and fixed by threads; the upper end cover (12) of the fixed ratio pressure reducing valve and the valve body (14) of the fixed ratio pressure reducing valve are preferably connected by threads; the lower end cover (18) of the fixed ratio pressure reducing valve is inserted into the valve body (14) of the fixed ratio pressure reducing valve and is preferably fixed by bolts.

7. The ultra-high pressure large-diameter quick-opening control device according to any one of claims 1 to 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 (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 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 fast-opening control device according to any one of claims 1 to 7, characterized in that: The bottom of the main valve core (5) is preferably in a conical structure and is designed as an unbalanced structure, that is, when the 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 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.

9. The ultra-high pressure large-diameter quick-opening control device according to any one of claims 1 to 8, characterized in that: The above-mentioned quick-opening control device is suitable for ultra-high pressure of 0 to 350 MPa and working 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 above-mentioned quick-opening control device is DN85, and its opening action is controlled within 5ms.

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