A large-caliber quick-opening valve body assembly

Abstract

The present invention relates to the field of valve body structure, specifically a large-caliber quick-opening valve body assembly, including a main valve structure, wherein the main valve structure is connected with a secondary valve structure used for opening and closing the main valve structure; the present invention discloses a large-caliber quick-opening valve body assembly, which uses an electromagnetic pilot valve and an air-controlled pilot valve as control-level pilot valves of a main valve, controls the opening and closing of the air-controlled pilot valve by turning on and off the power of an electromagnetic pilot valve coil assembly, and further controls the opening and closing state of the main valve, and uses a combination of two pilot valves to increase the flow area of ​​a main valve control chamber, speed up the pressure building and pressure relief speed of the main valve control chamber, improve the opening and closing response speed of a main valve core, and achieve the design goal of fast response of a large-caliber pneumatic valve. The product is applied in the launch system of a military unmanned aerial vehicle, and can also be applied in other carriers, spacecraft power systems, and other occasions requiring large-flow high-pressure gas, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to the field of valve body structures, in particular to a large-caliber quick-opening valve body assembly. Background Art

[0002] In the military UAV launch system, a large flow of high-pressure gas is required to provide thrust for the launch, and at the same time, a fast response time is required when the gas is ejected. The traditional straight-through solenoid valve has a maximum diameter of 5mm, which does not meet the large flow diameter requirement. The use of a pilot structure will increase the damping of the valve core during movement, resulting in a slower opening time of the main valve, which cannot meet the usage requirements.

[0003] In order to improve the above problems, it is necessary to optimize the design of the existing valve body structure. Summary of the invention

[0004] The object of the present invention is to provide a quick-opening valve body assembly with large flow and fast response speed.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A large-caliber quick-opening valve body assembly comprises a main valve structure, wherein the main valve structure is connected to a secondary valve structure for opening and closing the main valve structure;

[0007] The main valve structure comprises a main valve body, a valve core cavity is provided in the main valve body, and a main valve core is arranged in the valve core cavity; a medium inlet channel and a medium outlet channel are provided on the main valve body; the valve core cavity is connected with the medium inlet channel and the medium outlet channel; the main valve core is arranged inside the valve core cavity to control the on-off of the medium inlet channel and the medium outlet channel;

[0008] A main valve cutting edge is arranged in the valve core cavity; the upper end of the main valve core is used in cooperation with the main valve cutting edge;

[0009] The main valve body is connected to a secondary valve structure;

[0010] The auxiliary valve structure includes an auxiliary valve body, on which a control gas inlet channel is provided; the auxiliary valve body is provided with an electromagnetic pilot valve and an air-controlled pilot valve, and the control gas inlet channel is connected to the electromagnetic pilot valve and the air-controlled pilot valve; the electromagnetic pilot valve controls the on-off of the main valve structure through the air-controlled pilot valve.

[0011] An electromagnetic pilot valve cavity is provided on the auxiliary valve body; the electromagnetic pilot valve is arranged in the electromagnetic pilot valve cavity; the electromagnetic electromagnetic pilot valve includes a coil assembly; the coil assembly includes an electromagnetic valve body, and a coil is provided on the electromagnetic valve body; a electromagnetic valve cavity is provided in the electromagnetic valve body, and an electromagnetic pilot valve core is arranged in the electromagnetic valve cavity; the coil assembly is connected to the electromagnetic pilot valve core through an electromagnetic pilot valve spring; a valve seat is arranged at the lower end of the electromagnetic valve body; a valve seat cutting edge is provided on the valve seat; an electromagnetic control air inlet is provided on the valve seat; an electromagnetic pilot valve exhaust port and a control air outlet on the electromagnetic valve body are provided on the electromagnetic valve body; a control air inlet channel of an air-controlled pilot valve is provided on the auxiliary valve body; the electromagnetic pilot valve is connected to the air-controlled pilot valve through the control air inlet channel of the air-controlled pilot valve.

[0012] The auxiliary valve body is provided with an air-controlled pilot valve cavity; the air-controlled pilot valve is arranged in the air-controlled pilot valve cavity; the air-controlled pilot valve includes an air-controlled pilot valve core, and the air-controlled pilot valve core is provided with a pressing mechanism; the pressing mechanism includes an air-controlled pilot valve spring arranged at the upper end of the air-controlled pilot valve core; the air-controlled pilot valve cavity includes an air-controlled upper valve cavity, an air-controlled middle valve cavity and an air-controlled lower valve cavity; the air-controlled upper valve cavity, the air-controlled middle valve cavity and the air-controlled lower valve cavity are connected in sequence; the air-controlled middle valve cavity is provided with a middle cutting edge; the air-controlled upper valve cavity includes a first A valve chamber and a second valve chamber, the inner diameter of the first valve chamber is larger than that of the second valve chamber; the first valve chamber is connected with the air-controlled middle valve chamber through the second valve chamber; the air-controlled pilot valve core is connected with the discharge valve core through a connecting rod; the air-controlled lower valve chamber includes a third valve chamber and a fourth valve chamber; the third valve chamber is connected with the fourth valve chamber, and the connecting rod passes through the third valve chamber and is connected with the discharge valve core in the fourth valve chamber; a main valve control air inlet is provided on the inner wall of the third valve chamber, and the main valve control air inlet connects the air-controlled pilot valve and the main valve body.

[0013] The air-controlled pilot valve also includes a discharge orifice plate arranged at the end of the fourth valve cavity; the discharge orifice plate is connected to the auxiliary valve body through a thread; a plug is provided on the solenoid valve body; a solenoid pilot valve exhaust port is provided in the plug; the vertical cross-section of the air-controlled pilot valve control gas inlet channel is V-shaped.

[0014] An air-controlled spring cavity is provided at the upper end of the air-controlled pilot valve core; the air-controlled pilot valve spring is arranged in the air-controlled spring cavity; a unloading ring is arranged in the air-controlled spring cavity, and the unloading ring is arranged at the upper end of the air-controlled pilot valve core; a cover plate is arranged at the upper end of the unloading ring; the cover plate is mounted on the auxiliary valve body by screws; a drainage hole is provided on the air-controlled pilot valve core, and the drainage hole is connected with the air-controlled spring cavity at the upper end of the air-controlled pilot valve core; the control air inlet channel is connected with the air-controlled spring cavity through the drainage hole.

[0015] The main valve core is connected to an adjusting mechanism, which includes a valve stem connected to the main valve core, and the valve stem is connected to a piston; a main valve control air inlet is provided on the main valve body; the main valve control air inlet is arranged in the area between the main valve core and the piston.

[0016] A piston sleeve is provided in the valve core cavity; the vertical cross-section of the piston sleeve is H-shaped; the piston sleeve includes a sleeve body, in which a partition plate is provided; the valve stem passes through the partition plate and is connected to the piston below the partition plate; the piston is arranged inside the sleeve body; the main valve control air inlet passes through the sleeve body and extends to the inner side of the sleeve body; the piston, the partition plate and the sleeve body form a main valve control chamber.

[0017] A return spring is sleeved on the valve stem, one end of the return spring is connected to the main valve core, and the other end is pressed against the partition plate of the piston sleeve; a reflux hole is provided on the main valve body, and the main valve core, the piston sleeve and the partition plate constitute a main valve spring installation chamber; the reflux hole is connected to the main valve spring installation chamber.

[0018] The main valve body is connected to the main valve body through a guide part, the guide part includes a guide column arranged on the main valve body, the main valve body is provided with a guide hole, the guide column is inserted in the guide hole; a second friction reducing ring is arranged between the guide column and the guide hole.

[0019] The medium outlet channel is an arc-shaped pipeline; the central axis of the medium outlet channel is 45 degrees to the movement direction of the main valve.

[0020] The advantages of the present invention are:

[0021] The present invention discloses a large-caliber quick-opening valve body assembly. The present invention uses both an electromagnetic pilot valve and an air-controlled pilot valve as control-level pilot valves of a main valve, controls the opening and closing of the air-controlled pilot valve by turning on and off the power to the electromagnetic pilot valve coil assembly, and further controls the opening and closing state of the main valve. The combination of two pilot valves increases the flow area of ​​a main valve control chamber, speeds up the pressure building and pressure relief of the main valve control chamber, improves the opening and closing response speed of the main valve core, and achieves the design goal of fast response of a large-caliber pneumatic valve. The product is applied in the launch system of a military unmanned aerial vehicle, and can also be applied to other carriers, spacecraft power systems, and other occasions that require large-flow high-pressure gas, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0023] Figure 1 It is a cross-sectional view of the main valve structure in the present invention.

[0024] Figure 2 It is a cross-sectional view of the auxiliary valve structure in the present invention.

[0025] The marks in the above figure are:

[0026] In the figure, 1, main valve body, 2, main valve core, 3, main spring, 4, valve stem, 5, clamping nut, 6, piston sleeve, 7, wear-reducing ring 1, 8, cylinder head, 9, nut, 10, gasket, 11, screw, 12, piston, 20, auxiliary valve housing, 30, coil assembly, 301, coil, 302, cover, 303, valve body, 31, valve seat, 32, solenoid pilot valve core, 33, solenoid pilot valve spring, 34, plug, 41, air-controlled pilot valve core, 42, air-controlled pilot valve spring, 43, unloading ring, 44, discharge valve core, 45, discharge orifice plate, 46, pilot valve screw, 47, cover plate. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0028] A large-caliber quick-opening valve body assembly comprises a main valve structure 2-1, wherein the main valve structure 2-1 is connected with a secondary valve structure 2-2 for opening and closing the main valve structure 2-1; the present invention discloses a large-caliber quick-opening valve body assembly, wherein the present invention uses both an electromagnetic pilot valve and an air-controlled pilot valve as control-level pilot valves of the main valve, controls the opening and closing of the air-controlled pilot valve by turning on and off the power to the electromagnetic pilot valve coil assembly 30, and further controls the opening and closing state of the main valve, and uses the combination of two pilot valves to increase the flow area of ​​the main valve control chamber, speed up the pressure building and pressure relief speed of the main valve control chamber, improve the opening and closing response speed of the main valve core 2, and achieve the design goal of fast response of large-caliber pneumatic valves. The product is applied in the launch system of military unmanned aerial vehicles, and can also be applied in other carriers, spacecraft power systems and other occasions requiring large-flow high-pressure gas, and has broad application prospects.

[0029] The valve body assembly product disclosed in the present invention has a compact structure and a high degree of integration. The main valve outlet diameter can reach 100 mm. The unloading structure makes the opening response less than 10 ms. It can achieve fast response while allowing large flow media to pass through. It can be well applied to occasions requiring large flow power sources, such as military UAV launches.

[0030] Specifically, the valve body assembly disclosed in the present invention includes a main valve structure 2-1. The main valve structure 2-1 is mainly used to facilitate the on-off control of the flow of the medium. In addition, in the present invention, the main valve structure 2-1 is connected to a secondary valve structure 2-2 used for opening and closing the main valve structure 2-1. The present invention controls the function of the main valve structure 2-1 through the secondary valve structure 2-2 through the setting of the secondary valve structure 2-2. Through the combination of the two pilot valves, the flow area of ​​the main valve control chamber is increased, and then the response speed of the valve body assembly can be increased.

[0031] In addition, the main valve structure 2-1 described in the present invention includes a main valve body 1, and the main valve body 1 is the main structure of the main valve structure 2-1, which facilitates the arrangement and placement of other components. In addition, a valve core cavity 1-3 is provided in the main valve body 1 described in the present invention, and a main valve core 2 is arranged in the valve core cavity 1-3; the valve core cavity 1-3 is a placement cavity, which facilitates the arrangement of the main valve core 2 and subsequent adjustment mechanisms. In addition, a medium inlet channel 1-1 and a medium outlet channel 1-2 are provided on the main valve body 1 described in the present invention; the medium inlet channel 1-1 and the medium outlet channel 1-2 are used to circulate the medium. circulation; specifically, in the present invention, the valve core cavity 1-3 is connected with the medium inlet channel 1-1 and the medium outlet channel 1-2; the main valve core 2 is arranged inside the valve core cavity 1-3 to control the on-off of the medium inlet channel 1-1 and the medium outlet channel 1-2; the circulating medium enters the valve core cavity 1-3 through the medium inlet channel 1-1, and is then discharged from the valve core cavity 1-3 through the medium outlet channel 1-2. The main valve core 2 in the valve core cavity 1-3 is used to control the on-off of the medium inlet channel 1-1 and the medium outlet channel 1-2, thereby realizing the circulation control of the medium.

[0032] In addition, in the present invention, a main valve cutting edge 1-4 is provided in the valve core cavity 1-3; the upper end of the main valve core 2 is used in conjunction with the main valve cutting edge 1-4; when the main valve core 2 of the present invention and the main valve cutting edge 1-4 are fitted together, they play a blocking role, which is used to separate the medium inlet channel 1-1 and the medium outlet channel 1-2, thereby making the main valve in a closed state. When the main valve core 2 is separated from the main valve cutting edge 1-4, the main valve structure 2-1 is in an open state.

[0033] In addition, in the present invention, the main valve body 1 is connected to a secondary valve structure 2-2; the purpose of the secondary valve is to control the opening and closing of the main valve structure 2-1, that is, to control the position of the main valve core 2 in the valve core cavity 1-3 to achieve the on and off of the main valve structure 2-1.

[0034] In the present invention, the auxiliary valve structure 2-2 includes an auxiliary valve body 20, and the auxiliary valve body 20 is provided with a control gas inlet channel 2-3; the setting of the control gas inlet channel 2-3 can realize that the control gas can enter the auxiliary valve structure 2-2 and the main valve structure 2-1 later; finally enter the main valve structure 2-1 for gas supply, and realize the opening and closing of the main valve structure 2-1; specifically, in the present invention, the auxiliary valve body 20 is provided with an electromagnetic pilot valve and an air-controlled pilot valve, and the control gas inlet channel 2-3 and the electromagnetic pilot valve And connected to the air-controlled pilot valve; the solenoid pilot valve controls the on and off of the main valve structure 2-1 through the air-controlled pilot valve; the present invention uses the solenoid pilot valve and the air-controlled pilot valve as the control-level pilot valve of the main valve, and controls the opening and closing of the air-controlled pilot valve by turning on and off the power of the solenoid pilot valve coil assembly 30, thereby controlling the opening and closing state of the main valve. The combination of two pilot valves increases the flow area of ​​the main valve control chamber, speeds up the pressure building and pressure relief of the main valve control chamber, and improves the opening and closing response speed of the main valve core 2.

[0035] Furthermore, in the present invention, the auxiliary valve body 20 is provided with an electromagnetic pilot valve cavity 3-1; the electromagnetic pilot valve is arranged in the electromagnetic pilot valve cavity 3-1; the electromagnetic electromagnetic pilot valve includes a coil assembly 30; the coil assembly 30 includes an electromagnetic valve body, and the electromagnetic valve body is provided with a coil; the electromagnetic valve body is provided with an electromagnetic valve cavity, and an electromagnetic pilot valve core 32 is arranged in the electromagnetic valve cavity; the coil assembly 30 is connected to the electromagnetic pilot valve core 32 through an electromagnetic pilot valve spring 33; a valve seat 31 is arranged at the lower end of the electromagnetic valve body; the valve seat 31 is provided with a valve seat 31 cutting edge ; An electromagnetic control air inlet 2-4 is provided on the valve seat 31; an electromagnetic pilot valve exhaust port and a control air outlet on the electromagnetic valve body are provided on the electromagnetic valve body; the electromagnetic pilot valve chamber 3-1 of the present invention is used for arranging and placing the electromagnetic pilot valve, and in addition, the coil assembly 30 is used to control the action of the electromagnetic valve core, and is used to control the control air to enter the air-controlled pilot valve through the air-controlled pilot valve control air inlet channel 3-3; the coil is used to generate magnetism when energized, so as to facilitate the movement of the electromagnetic pilot valve core 32, and the cooperation between the electromagnetic valve core and the cutting edge of the valve seat 31 can realize the on-off control of the electromagnetic pilot valve by the electromagnetic valve core.

[0036] In addition, in the present invention, an air-controlled pilot valve control air inlet channel 3-3 is provided on the auxiliary valve body 20; the solenoid pilot valve is connected with the air-controlled pilot valve through the air-controlled pilot valve control air inlet channel 3-3; the present invention facilitates the control air flowing through the solenoid pilot valve to enter the air-controlled pilot valve through the setting of the air-controlled pilot valve control air inlet channel 3-3, thereby realizing the opening of the air-controlled pilot valve, and finally facilitating the control air to enter the main valve body 1 to realize the on-off control of the main valve body 1.

[0037] In addition, in the present invention, an air-controlled pilot valve cavity 3-2 is provided on the auxiliary valve body 20; the air-controlled pilot valve is arranged in the air-controlled pilot valve cavity 3-2; the setting of the air-controlled pilot valve cavity 3-2 facilitates the arrangement and placement of the air-controlled pilot valve; in addition, in the present invention, the air-controlled pilot valve includes an air-controlled pilot valve core 41, and a pressing mechanism is provided on the air-controlled pilot valve core 41; the pressing mechanism includes an air-controlled pilot valve spring 42 arranged at the upper end of the air-controlled pilot valve core 41; the setting of the pressing mechanism facilitates the return of the air-controlled pilot valve core 41 to achieve the closing of the air-controlled pilot valve; in addition, in the present invention, the air-controlled pilot valve cavity 3-2 includes an air-controlled upper valve The air-controlled upper valve chamber 3-31, the air-controlled middle valve chamber 3-32 and the air-controlled lower valve chamber 3-33; the air-controlled upper valve chamber 3-31 is used to be connected with the air-controlled pilot valve control gas inlet channel 3-3, and the subsequent control gas enters the air-controlled upper valve chamber 3-31 through the air-controlled pilot valve control gas inlet channel 3-3 to push the air-controlled pilot valve valve core 41, thereby opening the air-controlled pilot valve. In actual production, the air-controlled upper valve chamber 3-31, the air-controlled middle valve chamber 3-32 and the air-controlled lower valve chamber 3-33 are connected in sequence; the air-controlled middle valve chamber 3-32 is provided with a middle cutting edge 3-4; the setting of the middle cutting edge 3-4 plays a good sealing and limiting role It is convenient for the subsequent cooperation with the air-controlled pilot valve core 41 to realize the connection between the air-controlled middle valve chamber 3-32 and the air-controlled upper valve chamber 3-31, so as to realize the external discharge of the controller in the main valve body 1; specifically, in the present invention, the air-controlled upper valve chamber 3-31 includes a first valve chamber and a second valve chamber, and the inner diameter of the first valve chamber is larger than the inner diameter of the second valve chamber; a step is formed at the connection between the first valve chamber and the second valve chamber of the present invention, so as to realize the longitudinal limitation of the air-controlled pilot valve core 41; in addition, in the present invention, the first valve chamber is connected with the air-controlled middle valve chamber 3-32 through the second valve chamber; the air-controlled pilot valve core 41 is connected with the discharge through a connecting rod The valve core 44 is connected; the discharge valve core 44 is used to control the closure of the air-controlled lower valve chamber 3-33, and finally realize the discharge operation of the control gas through the air-controlled pilot valve; in addition, in the present invention, the air-controlled lower valve chamber 3-33 includes a third valve chamber and a fourth valve chamber; the third valve chamber is connected to the fourth valve chamber, and the connecting rod passes through the third valve chamber and is connected to the discharge valve core 44 in the fourth valve chamber; a main valve control gas inlet 3-6 is provided on the inner wall of the third valve chamber, and the main valve control gas inlet 3-6 connects the air-controlled pilot valve and the main valve body 1; through such an arrangement, the present invention facilitates the control of the flow direction of the control gas as needed in subsequent use.

[0038] Furthermore, the air-controlled pilot valve in the present invention also includes a discharge orifice plate 45 arranged at the end of the fourth valve cavity; the discharge orifice plate 45 is connected to the auxiliary valve body 20 through a thread; the present invention can be used to control the discharge speed of the control gas in actual use through the setting of the discharge orifice plate 45; at the same time, a plug 34 is provided on the solenoid valve body in the present invention; an electromagnetic pilot valve exhaust port is provided in the plug 34; the plug 34 plays a good protective role to prevent excess debris from entering the electromagnetic pilot valve and discharging the control gas; in addition, the vertical cross-section of the control gas inlet channel 3-3 of the air-controlled pilot valve in the present invention is V-shaped; such a setting makes the control gas inlet channel 3-3 of the air-controlled pilot valve itself have good buffering properties, thereby ensuring the smooth flow of the control gas.

[0039] Further, in the present invention, an air-controlled spring cavity 3-5 is provided at the upper end of the air-controlled pilot valve core 41; the air-controlled pilot valve spring 42 is arranged in the air-controlled spring cavity 3-5; the arrangement of the air-controlled spring cavity 3-5 facilitates the arrangement and placement of the air-controlled pilot valve core 41, and facilitates the subsequent matching of the drainage hole, and facilitates the rapid return of the air-controlled pilot valve core 41; in addition, in the present invention, a relief ring 43 is arranged in the air-controlled spring cavity 3-5, and the relief ring 43 is arranged at the upper end of the air-controlled pilot valve core 41; a cover plate 47 is arranged at the upper end of the relief ring 43; the cover plate 47 is mounted on the auxiliary valve body 20 by screws 11 On; the setting of the unloading ring 43 plays a good limiting role. The unloading ring 43 is arranged in the gas-controlled spring cavity 3-5, and the unloading ring 43 cooperates with the gas-controlled spring cavity 3-5 to realize the guidance of the unloading ring 43; in addition, in the present invention, the gas-controlled pilot valve core 41 is provided with a drainage hole, and the drainage hole is connected with the gas-controlled spring cavity 3-5 at the upper end of the gas-controlled pilot valve core 41; the control gas inlet channel 2-3 is connected with the gas-controlled spring cavity 3-5 through the drainage hole; in actual arrangement, the drainage hole can introduce the control gas into the gas-controlled spring cavity 3-5, so as to facilitate the rapid return of the gas-controlled pilot valve core 41.

[0040] Furthermore, in the present invention, the main valve core 2 is connected to an adjusting mechanism, and the adjusting mechanism includes a valve stem 4 connected to the main valve core 2, and the valve stem 4 is connected to a piston 12; a main valve control air inlet 3-6 is provided on the main valve body 1; the main valve control air inlet 3-6 is arranged in the area between the main valve core 2 and the piston 12; the setting of the adjusting mechanism facilitates the operation control of the main valve core 2, and the setting of the valve stem 4 plays a good bridging role, which facilitates the subsequent arrangement of the piston 12; in addition, in the present invention, the main valve control air inlet 3-6 is arranged in the area between the main valve core 2 and the piston 12; such an arrangement method can enable the control air to control the reciprocating operation of the piston 12 through the main valve control air inlet 3-6; thereby realizing the operation of the main valve core 2 in the main valve body 1 and realizing the on-off operation of the main valve structure 2-1.

[0041] Furthermore, in the present invention, a piston sleeve 6 is provided in the valve core cavity 1-3; the vertical cross-section of the piston sleeve 6 is H-shaped; the piston sleeve 6 includes a sleeve body, in which a partition plate 6-1 is provided; the valve stem 4 passes through the partition plate 6-1 and is connected to the piston 12 below the partition plate 6-1; in the present invention, the piston sleeve 6 plays a good guiding role, which is convenient for controlling the subsequent operation of the main valve core 2 and the piston 12; in subsequent use, in the present invention, the piston 12 is arranged inside the sleeve body; the main valve control air inlet 3-6 passes through the sleeve body and extends to the inner side of the sleeve body; the piston 12, the partition plate 6-1 and the sleeve body form a main valve control chamber; the control air from the valve control air inlet enters the main valve control chamber, and by pushing the piston 12, the main valve core 2 is moved downward, and finally the main valve structure 2-1 is opened.

[0042] Furthermore, in the present invention, a return spring 3 is sleeved on the valve stem 4, one end of the return spring 3 is connected to the main valve core 2, and the other end is pressed against the partition plate 6-1 of the piston sleeve 6; the setting of the return spring 3 facilitates the return operation of the main valve core 2, and the purpose is to achieve the closing of the main valve structure 2-1; in addition, in the present invention, a return hole 1-5 is provided on the main valve body 1, and the main valve core 2, the piston sleeve 6 and the partition plate 6-1 constitute the main valve spring installation cavity; the return hole 1-5 is connected to the main valve spring installation cavity; the present invention adopts such a setting, so that the present invention forms a pressure-balanced unloading structure, eliminates the influence of the medium pressure on the force of the main valve core 2 when it is opened, reduces the load force of the main valve spring, and is conducive to the rapid opening and closing of the main valve.

[0043] Furthermore, in the present invention, the main valve body 1 is connected to the main valve body 1 through a guide portion, and the guide portion includes a guide column 1-6 arranged on the main valve body 1, and a guide hole 1-61 is provided on the main valve body 1, and the guide column 1-6 is inserted into the guide hole 1-61; a second friction-reducing ring 7 is arranged between the guide column 1-6 and the guide hole 1-61; the setting of the guide portion plays a good guiding role, which is conducive to ensuring the linearity of the movement of the main valve body 1.

[0044] Furthermore, in the present invention, the medium outlet channel 1-2 is an arc-shaped pipe; the central axis of the medium outlet channel 1-2 is 45° to the movement direction of the main valve; through such an arrangement, the present invention facilitates the smooth passage of the medium through the main valve structure 2-1; and reduces the operating shaking of the valve body assembly.

[0045] specific;

[0046] The valve body assembly disclosed in the present invention mainly comprises a main valve structure 2-1, wherein the main valve structure 2-1 is connected to a secondary valve structure 2-2 used for opening and closing the main valve structure 2-1.

[0047] The main valve structure 2-1 disclosed in the present invention mainly comprises a main valve body 1, a main valve core 2, a return spring 3, a valve stem 4, a clamping nut 5, a piston sleeve 6, a cylinder head 8, a locking nut 9, a gasket 10, a screw 11, a piston 12, a friction reducing ring 7 and a rubber ring; the main valve core 2 is installed in the main valve body 1, and its rubber sealing surface contacts with the main valve cutting edge 1-4 sealing surface of the main valve body 1 to form a seal of the main valve, and one end of the return spring 3 is installed in the inner cavity of the main valve core 2, and the other end is installed in the inner cavity of the piston sleeve 6, so as to press the main valve core 2 against the sealing surface of the main valve body 1;

[0048] The piston sleeve 6 is installed in the valve core cavity 1-3 and is fixed on the step of the valve core cavity 1-3 by the cylinder cover 8; the cylinder cover 8 is connected to the main valve body 1 by screws 11;

[0049] The ball head end of the valve stem 4 contacts the mounting hole of the valve stem 4 in the inner cavity of the main valve core 2, and the valve stem 4 is fixed by a clamping nut 5, and the clamping nut 5 is connected to the main valve core 2 by a thread; the other end of the valve stem 4 passes through the center hole of the piston sleeve 6, the center hole of the piston 12, and the center hole of the gasket 10, and is locked with a nut 9; the piston 12 is installed in the piston sleeve 6 and is fixed to the step of the small shaft end of the valve stem 4 by a nut and a gasket 10.

[0050] In addition, the auxiliary valve described in the present invention includes an auxiliary valve body 20; an electromagnetic pilot valve and an air-controlled pilot valve are arranged in the auxiliary valve body 20. Except for the nozzle on the right side, the structure of the auxiliary valve body 20 is completely symmetrical on the left and right sides. The electromagnetic valve on the left side is a closing electromagnetic valve, which is only used in emergency closing and special occasions, and the electromagnetic valve on the right side is an opening electromagnetic valve. The present invention mainly introduces the opening electromagnetic pilot valve and the air-controlled pilot valve on the right side.

[0051] In the present invention, the electromagnetic pilot valve comprises a coil assembly 30 , a valve seat 31 , an electromagnetic pilot valve core 32 , an electromagnetic pilot valve spring 33 and a plug 34 .

[0052] In the present invention, the valve seat 31 is installed on the coil assembly 30 by means of threads; the lower end of the solenoid pilot valve core 32 contacts the sealing edge of the valve seat 31 and is pressed by the solenoid pilot valve spring 33; the solenoid pilot valve spring 33 is installed between the spring hole of the coil assembly 30 and the spring hole of the solenoid pilot valve core 32; the plug 34 is installed at the end of the coil assembly 30 to control the discharge of gas.

[0053] In the present invention, the pneumatic pilot valve comprises a pneumatic pilot valve core 41, a pneumatic pilot valve spring 42, a unloading ring 43, a discharge valve core 44, and a discharge orifice plate 45; the pneumatic pilot valve core 41 is installed in the auxiliary valve body 20, and the sealing surface of the pneumatic pilot valve core 41 is pressed against the upper edge of the auxiliary valve body 20 by the pneumatic pilot valve spring 42; the lower end of the pneumatic pilot valve spring 42 is installed in the inner hole of the pneumatic pilot valve core 41 (the inner hole is the pneumatic spring cavity 3-5), and the upper end is installed in the inner hole of the unloading ring 43; one end of the unloading ring 43 with a hole is installed in the inner hole of the pneumatic pilot valve core 41, and the other end is pressed by a cover plate 47; the cover plate 47 is fixed to the upper end of the outer side of the auxiliary valve body 20 by a pilot valve screw 46.

[0054] The discharge valve core 44 is installed at the lower end of the auxiliary valve body 20 and is connected to the gas-controlled pilot valve core 41 through internal threads; the discharge orifice plate 45 is threadedly connected to the lower end of the auxiliary valve body 20 through internal threads to control the discharge speed of the gas.

[0055] In addition, in the present invention, the auxiliary valve structure 2-2 is connected to the main valve by bolts, and a rubber ring for sealing the connection with the main valve is provided at the opening and closing of the electromagnetic valve air inlet.

[0056] At the same time, in the present invention, the discharge orifice plates 45 of different specifications can be installed on the auxiliary valve structure 2-2 to control the speed of the driving gas entering the main valve control chamber and the exhaust speed of the main valve control chamber.

[0057] In addition, the main valve structure 2-1 of the present invention adopts a unloading structure, which can minimize the medium pressure acting on the main valve core 2 when the main valve core 2 is closed, reducing the required opening force and accelerating the response time of the main valve core 2.

[0058] Both ends of the solenoid pilot valve core 32 in the auxiliary valve have sealing surfaces, which can realize the sealing of the solenoid pilot valve core at the open and closed positions.

[0059] The technical problem to be solved by the present invention is that the existing pneumatic valves cannot meet the problem of rapid start-up of large-diameter structures. For this purpose, a large-diameter quick-opening pneumatic valve is provided, which has the characteristics of high working pressure, fast response speed and repeatable start-up. It is suitable for high-pressure gas occasions that require large flow and rapid response, such as military unmanned aerial vehicle launches and rocket engine ground tests.

[0060] The specific technical solution of the present invention is:

[0061] The main valve core 2 of the present invention is installed in the main valve body 1, and the rubber sealing surface of the main valve core 2 and the sealing edge of the main valve body 1 constitute the seal of the main valve, and two independent air cavities are formed between the main valve body 1, namely the main valve control cavity and the main valve spring installation cavity; the main valve control cavity can ensure that the control gas is completely isolated from the working medium; the main valve body 1 is provided with a main valve inlet and a main valve outlet; the main valve spring is installed in the main spring installation cavity formed by the main valve core 2 and the piston sleeve 6, to provide sealing force for the main valve core 2, so that the main valve medium inlet and the medium outlet are blocked; the valve stem 4 is fixed to the main valve core 2 at one end by a clamping nut 5, and the other end passes through the center hole of the piston sleeve 6 and the piston 12, and is fixed to the lower end surface of the piston 12 by locking the nut, thereby realizing the synchronous movement of the main valve core 2 and the piston 12; the piston 12 is installed in the piston sleeve 6, and the upper end surface of the piston 12 and the piston sleeve 6 form the control air cavity of the main valve, and the sealing of the control air cavity is realized by a rubber ring.

[0062] Furthermore, since the diameter of the main valve medium inlet is large and the sealing diameter of the main valve medium outlet is also relatively large, the medium force acting on the main valve core 2 is relatively large. In order to reduce the influence of the medium force and reduce the structural dimensions of the main valve spring and the main valve body 1, the main valve core 2 adopts a unloading structure, and a sealing ring is provided at the mating part of the main valve core 2 and the piston sleeve 6, and the sealing diameter of the sealing ring is close to the sealing diameter of the main valve core 2 at the medium outlet, thereby eliminating the influence of the inlet medium on the medium force of the main valve core 2 when the main valve core 2 is in the closed state, and reducing the demand for sealing spring force.

[0063] When the main valve core 2 is in the open state, since the main spring installation chamber is connected to the medium outlet, the force exerted by the medium on the main valve core 2 is balanced, eliminating the influence of the medium on the force exerted on the main valve core 2, further reducing the spring force required for closing the main valve core 2, and adopting a unloading structure to reduce the influence of the medium force on the movement of the main valve core 2, thereby reducing the size of the sealing structure and improving the response speed of the main valve core 2.

[0064] The auxiliary valve includes an auxiliary valve body 20; an electromagnetic pilot valve and an air-controlled pilot valve are provided on the auxiliary valve body 20, the electromagnetic pilot valve controls the on-off of the air circuit of the air-controlled pilot valve by turning on and off the power, and the air-controlled pilot valve is used to control the inflation and exhaust of the main valve control chamber to provide an opening force for the main valve core 2.

[0065] The auxiliary valve uses a structural form of a combination of an electromagnetic pilot valve and a pneumatic pilot valve to enlarge the flow area of ​​the control air inlet and exhaust flow channels, accelerate the inflation speed and exhaust speed of the control air to the main valve control chamber, thereby enabling the main valve control chamber to achieve the functions of rapid inflation and pressure building and rapid deflation and pressure relief, thereby improving the opening and closing speeds of the main valve and achieving a rapid response function of the main valve.

[0066] The air-controlled pilot valve is a two-position five-way valve, including an air-controlled pilot valve core 41, an air-controlled pilot valve spring 42, an exhaust valve core, a unloading ring 43 and corresponding rubber rings; the auxiliary valve body 20 is provided with various air inlet channels for the control air.

[0067] Furthermore, the seal of the air-controlled pilot valve is arranged in the auxiliary valve body 20, and forms a control air cavity with the air-controlled pilot valve core 41; the air-controlled pilot valve spring 42 is located between the inner cavity of the air-controlled pilot valve core 41 and the unloading ring 43, and is used to provide a closing force for the air-controlled pilot valve core 41, and at the same time form a sealing pair with the air-controlled pilot valve core 41 and the end of the air-controlled pilot valve control air inlet channel 3-3 of the air-controlled pilot valve; one end of the unloading ring 43 extends into the spring cavity of the air-controlled pilot valve core 41, and the other end is pressed by the cover plate 47.

[0068] The sealing structure of the unloading ring 43 enables the control air introduced into the inner cavity of the air-controlled pilot valve core 41 to provide closing force and sealing force for the air-controlled pilot valve core 41, thereby reducing the reset force and structural size of the air-controlled pilot valve spring 42, and realizing the rapid closing function of the air-controlled pilot valve after the air cavity is depressurized.

[0069] The solenoid pilot valve is a two-position three-way solenoid valve, including a coil assembly 30, a solenoid pilot valve core 32, and a solenoid pilot valve spring 33; the solenoid pilot valve is used to control the inflation and exhaust of the air cavity of the air-controlled pilot valve, and provide an opening force for the air-controlled pilot valve core 41.

[0070] The coil assembly 30 is provided with a control gas inlet, a control gas outlet and a control gas exhaust port, wherein the control gas outlet is communicated with the control chamber of the gas-controlled pilot valve.

[0071] The coil assembly 30 includes a solenoid valve body, a coil and a cover, wherein the coil is wound in an I-shaped groove of the valve body, and the cover is sleeved on the outside of the valve body;

[0072] The solenoid pilot valve core 32 is located in the solenoid pilot valve body, and an air flow channel for connecting the control air inlet and the control air exhaust is provided on the solenoid pilot valve core 32; the spring is installed between the solenoid pilot valve core 32 and the spring hole at the bottom of the coil assembly 30 to provide sealing force and reset force for the valve core of the solenoid pilot valve.

[0073] Furthermore, when the coil assembly 30 is energized, it provides an opening force for the solenoid pilot valve core 32. The valve core moves upward under the action of the electromagnetic force, so that the non-metallic sealing surface on the upper end of the solenoid pilot valve core 32 forms a sealing pair with the exhaust port end of the control gas. The control gas enters the control gas cavity of the air-controlled pilot valve through the control gas outlet of the solenoid pilot valve and the control gas inlet channel 3-3 of the air-controlled pilot valve (here the control gas control is equivalent to the first valve cavity in the air-controlled upper valve cavity 3-31), providing an opening force for the air-controlled pilot valve core 41, so that the exhaust valve core forms a sealing pair with the exhaust port end. Furthermore, the control gas enters the control gas cavity of the main valve through the main valve control gas inlet 3-6 channel 2-3, realizes the pressure building function of the main valve control cavity, provides an opening force for the main valve core 2, and opens the main valve.

[0074] Furthermore, when the coil assembly 30 is powered off, the electromagnetic force on the solenoid pilot valve disappears, and the solenoid pilot valve core 32 is reset under the action of the solenoid pilot valve spring 33, cutting off the control air inlet of the solenoid pilot valve, and the control air in the air-controlled pilot valve control air cavity is discharged from the exhaust port of the solenoid pilot valve. The air-controlled pilot valve core 41 is reset under the action of the air-controlled pilot valve spring 42, cutting off the connection between the control air and the main valve control cavity, and the control air in the main valve control cavity is discharged out of the valve from the air-controlled pilot valve control air exhaust port, thereby realizing the pressure relief function of the main valve control cavity, and the main valve core 2 is closed under the action of the main spring.

[0075] The beneficial effects of the present invention compared with the prior art are as follows:

[0076] The present invention uses both the electromagnetic pilot valve and the air-controlled pilot valve as the control-level pilot valve of the main valve. By turning on and off the power to the electromagnetic pilot valve coil assembly 30, the opening and closing of the air-controlled pilot valve are controlled, and then the opening and closing states of the main valve are controlled. The combination of the two pilot valves increases the flow area of ​​the main valve control chamber, speeds up the pressure building and pressure relief of the main valve control chamber, improves the opening and closing response speed of the main valve core 2, and achieves the design goal of fast response of large-caliber pneumatic valves. The product is used in the launch system of military unmanned aerial vehicles, and can also be used in other carriers, spacecraft power systems and other occasions that require large-flow high-pressure gas, and has broad application prospects.

[0077] The main valve of the present invention adopts a pressure-balanced unloading structure in design, which eliminates the influence of the medium pressure on the force of the main valve core 2 when it is opened, reduces the load force of the main valve spring, and is conducive to the rapid opening and closing of the main valve. At the same time, a long axis is provided at the center of the sealing end surface of the main valve core 2 to match the outlet of the main valve body 1, and can ensure the stability of the valve core during movement, making the structure of the main valve more compact and achieving the design purpose of miniaturization.

[0078] The side wall of the air-controlled pilot valve core 41 of the present invention is provided with a drainage hole communicated with the inner cavity of the valve core, which can introduce the control gas into the internal cavity of the valve core. Through the design of the unloading ring 43 and the O-type rubber sealing ring structure, the control gas introduced into the inner cavity of the valve core provides closing force and sealing force for the air-controlled pilot valve core 41, reducing the reset force of the air-controlled pilot valve spring 42 while improving the sealing performance.

[0079] The solenoid pilot valve of the present invention adopts a two-position three-way solenoid valve structure, and its control air outlet is connected to the control air cavity of the air-controlled pilot valve. When the solenoid valve is energized, the control air cavity of the air-controlled pilot valve can be quickly inflated and pressurized. When the solenoid valve is de-energized, the control air cavity can be quickly exhausted and depressurized.

[0080] In the present invention, the air-controlled pilot valve and the electromagnetic pilot are integrated and installed on the housing. Through the internal flow channel layout, the spatial structure size is compressed to the maximum extent, and the overall structure is further miniaturized and lightweight.

[0081] The valve body of the main valve of the present invention is processed by 3D printing additive manufacturing technology, which can directly form the flow channel without the need for complex hole processing and process hole filling and welding, thereby reducing the processing difficulty and increasing the strength of the shell.

[0082] The main valve core 2 of the present invention adopts rubber injection molding technology, the valve core sealing structures of the electromagnetic pilot valve and the air-controlled pilot valve are both plastic-metal reverse mushroom-shaped seals, and O-rings are used in the static sealing part to improve the reliability of high-pressure sealing.

[0083] The specific embodiments are as follows:

[0084] like Figure 1 As shown, the valve body assembly disclosed in the present invention mainly includes two parts: a main valve structure 2-1 and a secondary valve structure 2-2, wherein the secondary valve structure 2-2 includes a solenoid pilot valve and a gas-controlled pilot valve.

[0085] The solenoid pilot valve is a two-position three-way solenoid valve, comprising a valve seat 31, a solenoid pilot valve core 32, a solenoid pilot valve spring 33, a coil assembly 30 and a plug 34. The valve seat 31 is provided with a solenoid pilot valve control gas inlet, and the coil assembly 30 is provided with a control gas outlet and a control gas exhaust port, wherein the valve seat 31 is connected to the coil assembly 30 by threads, and the solenoid pilot valve core 32 is located in the solenoid pilot valve body. In the closed state, the lower end of the solenoid pilot valve core 32 cooperates with the valve seat 31 to form a seal at the solenoid pilot valve control gas inlet; in the open state, the upper end of the solenoid pilot valve core 32 and the sealing surface in the coil assembly 30 form a seal at the control gas exhaust port; the upper end face of the solenoid pilot valve spring 33 is installed in the spring hole of the coil assembly 30, and the lower end is against the upper end face of the solenoid pilot valve core 32; the plug 34 is installed on the outside of the coil assembly 30 by threads to prevent excess matter from entering the solenoid pilot valve and discharging the control gas.

[0086] The air-controlled pilot valve is installed on the auxiliary valve body 20, and includes an air-controlled pilot valve core 41, a relief ring 43, an air-controlled pilot valve spring 42, a discharge valve core 44, a discharge orifice plate 45, a cover plate 47 and a screw 11 (46). The air-controlled pilot valve core 41 is installed in the upper cavity of the auxiliary valve body 20, and the discharge valve core 44 is installed in the lower cavity of the shell, and is connected to the air-controlled pilot valve core 41 through a threaded rod extending from the end face of the air-controlled pilot valve core 41; the relief ring 43 is installed in the middle cavity of the air-controlled pilot valve core 41; one end of the air-controlled pilot valve spring 42 is installed in the spring installation cavity of the air-controlled pilot valve core 41, and the other end is installed in the inner hole of the relief ring 43, which is used to provide closing force for the air-controlled pilot valve core 41; the cover plate 47 is installed on the upper end of the external side of the auxiliary valve body, and is fixed to the auxiliary valve body 20 by screws 11 (46). The upper end of the air-controlled pilot valve core 41, the auxiliary valve body 20 and the rubber ring form a control air cavity of the air-controlled pilot valve. The sealing surface of the air-controlled pilot valve core 41 blocks the connection between the control air main channel and the air-controlled pilot valve exhaust cavity. The middle section of the air-controlled pilot valve core 41 is circumferentially provided with four drainage holes connected to the spring mounting cavity in the air-controlled pilot valve core 41. The gas in the control air main channel is introduced into the spring cavity of the air-controlled pilot valve core 41 through the drainage holes. Due to the sealing function of the rubber ring on the unloading ring 43, the control gas introduced into the spring cavity of the air-controlled pilot valve core 41 can provide the air-controlled pilot valve core 41 with a closing force and a sealing force when closing, thereby reducing the spring force required for resetting the air-controlled pilot valve core 41.

[0087] The main valve comprises a main valve body 1, a main valve core 2, a return spring 3, a valve stem 4, a clamping nut 5, a piston sleeve 6, a piston 12, a cylinder head 8, a nut (9), a gasket 10, a friction reducing ring 7 and a rubber ring; the medium inlet is arranged on the side wall of the main valve body 1, and its opening direction is perpendicular to the movement direction of the main valve core 2; the medium outlet is arranged at the upper end of the main valve body 1, and is 45 degrees to the movement direction of the main valve core 2. The main valve core 2 is installed in the main valve body 1, and its rubber sealing surface contacts the sealing surface on the main valve body 1 to form a seal of the main valve. A section of the axis extends from the center of one side of the sealing surface of the main valve core 2 and passes through the center hole on the outlet side of the main valve body 1, and a friction reducing ring 7 (13) is installed at the contact part with the center hole, so that the movement state of the main valve core 2 is more stable when subjected to lateral medium force; one end of the return spring 3 is installed in the inner cavity of the main valve core 2, and the other end is installed in the upper cavity of the piston sleeve 6, which is used to press the main valve core 2 in The sealing surface of the main valve body 1 provides sealing force for the main valve core 2 in the closed state, and provides closing force for the main valve core 2 to reset after opening; the piston sleeve 6 is installed in the inner cavity of the main valve body 1, and is fixed on the step of the valve core cavity 1-3 by the cylinder cover 8, and the cylinder cover 8 is fixedly connected to the main valve body 1 by the screw 11; the ball head end of the valve stem 4 contacts the mounting hole of the valve stem 4 in the inner cavity of the main valve core 2, and the valve stem 4 is fixed by the clamping nut 5, and the clamping nut 5 is connected to the main valve core 2 by thread. The other end of the valve stem 4 passes through the center hole of the piston sleeve 6, the center hole of the piston 12, and the center hole of the gasket 10, and is locked with a nut (9). The piston 12 is installed in the piston sleeve 6, and is fixed to the step of the small shaft end of the valve stem 4 by the nut (9) and the gasket 10. The upper end surface of the piston 12, the lower cavity of the sleeve and the valve stem 4 constitute the control air cavity of the main valve.

[0088] Working principle:

[0089] A large-caliber, fast-opening pneumatic valve includes a main valve and an auxiliary valve, wherein the auxiliary valve is composed of an electromagnetic pilot valve and an air-controlled pilot valve. During operation, direct current is supplied to the coil of the electromagnetic pilot valve, and the valve core 32 of the electromagnetic pilot valve moves upward under the action of electromagnetic force, so that the control gas inlet of the electromagnetic pilot valve is opened, and the exhaust port of the electromagnetic pilot valve is closed, so that the control gas enters the control gas cavity of the air-controlled pilot valve from the control gas outlet of the electromagnetic pilot valve. Under the action of the control gas, the valve core 41 of the air-controlled pilot valve overcomes the sealing force of the air-controlled pilot valve spring 42 and moves upward, and at the same time drives the exhaust valve core 44 to move together, so that the control gas port of the air-controlled pilot valve is opened, and the exhaust port is closed, and the control gas enters the control gas cavity of the main valve from the control gas inlet of the air-controlled pilot valve, and the piston 12 in the main valve drives the main valve core 2 connected thereto to move upward under the action of the pressure of the control gas. The air-controlled pilot valve moves downward to open the medium outlet of the main valve, and the working medium at the medium inlet of the main valve is ejected from the outlet; when the medium outlet of the main valve needs to be closed, the power supply to the electromagnetic pilot valve coil is stopped, and the electromagnetic pilot valve core 32 is reset under the action of the electromagnetic pilot valve spring 33, and the control air inlet of the electromagnetic pilot valve is closed, and the control air in the air-controlled pilot valve control air cavity is discharged from the control air exhaust port of the electromagnetic pilot valve. The air-controlled pilot valve core 41 is reset under the action of the air-controlled pilot valve spring 42, and the control air inlet of the air-controlled pilot valve is closed. At this time, the control air exhaust port of the air-controlled pilot valve is opened, and the control air in the main valve control cavity is discharged from the exhaust port of the air-controlled pilot valve. The main valve core 2 is reset under the action of the main valve spring to realize the closing of the main valve.

[0090] The pilot stage of the large-diameter fast-opening pneumatic valve adopts a structural form that combines an electromagnetic pilot valve and a gas-controlled pilot valve, which increases the diameter of the flow channel for the control gas to enter and exhaust the control cavity of the main valve, realizes the function of amplifying the control gas flow rate and flow velocity, speeds up the speed of pressure building and pressure relief in the control cavity of the main valve, and improves the opening and closing response speed of the valve.

[0091] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A large-caliber quick-opening valve body assembly, characterized in that: It includes a main valve structure, wherein the main valve structure is connected to a secondary valve structure used for opening and closing the main valve structure; The main valve structure comprises a main valve body, a valve core cavity is provided in the main valve body, and a main valve core is arranged in the valve core cavity; a medium inlet channel and a medium outlet channel are provided on the main valve body; the valve core cavity is connected with the medium inlet channel and the medium outlet channel; the main valve core is arranged inside the valve core cavity to control the on-off of the medium inlet channel and the medium outlet channel; A main valve cutting edge is arranged in the valve core cavity; the upper end of the main valve core is used in cooperation with the main valve cutting edge; The main valve body is connected to a secondary valve structure; The auxiliary valve structure comprises an auxiliary valve body, on which a control gas inlet channel is provided; the auxiliary valve body is provided with an electromagnetic pilot valve and an air-controlled pilot valve, and the control gas inlet channel is connected with the electromagnetic pilot valve and the air-controlled pilot valve; the electromagnetic pilot valve controls the on-off of the main valve structure through the air-controlled pilot valve; The auxiliary valve body is provided with an electromagnetic pilot valve cavity; the electromagnetic pilot valve is arranged in the electromagnetic pilot valve cavity; the electromagnetic pilot valve includes a coil assembly; the coil assembly includes an electromagnetic valve body, and the electromagnetic valve body is provided with a coil; the electromagnetic valve body is provided with an electromagnetic valve cavity, and the electromagnetic pilot valve core is arranged in the electromagnetic valve cavity; the coil assembly is connected to the electromagnetic pilot valve core through an electromagnetic pilot valve spring; a valve seat is arranged at the lower end of the electromagnetic valve body; a valve seat cutting edge is provided on the valve seat; an electromagnetic control gas inlet is provided on the valve seat; the electromagnetic valve body is provided with an electromagnetic pilot valve exhaust port and a control gas outlet on the electromagnetic valve body; the auxiliary valve body is provided with an air-controlled pilot valve control gas inlet channel; the electromagnetic pilot valve is connected to the air-controlled pilot valve through the air-controlled pilot valve control gas inlet channel; The auxiliary valve body is provided with an air-controlled pilot valve cavity; the air-controlled pilot valve is arranged in the air-controlled pilot valve cavity; the air-controlled pilot valve includes an air-controlled pilot valve core, and the air-controlled pilot valve core is provided with a pressing mechanism; the pressing mechanism includes an air-controlled pilot valve spring arranged at the upper end of the air-controlled pilot valve core; the air-controlled pilot valve cavity includes an air-controlled upper valve cavity, an air-controlled middle valve cavity and an air-controlled lower valve cavity; the air-controlled upper valve cavity, the air-controlled middle valve cavity and the air-controlled lower valve cavity are connected in sequence; the air-controlled middle valve cavity is provided with a middle cutting edge; the air-controlled upper valve cavity includes a first A valve chamber and a second valve chamber, the inner diameter of the first valve chamber is larger than that of the second valve chamber; the first valve chamber is connected with the air-controlled middle valve chamber through the second valve chamber; the air-controlled pilot valve core is connected with the discharge valve core through a connecting rod; the air-controlled lower valve chamber includes a third valve chamber and a fourth valve chamber; the third valve chamber is connected with the fourth valve chamber, and the connecting rod passes through the third valve chamber and is connected with the discharge valve core in the fourth valve chamber; a main valve control air inlet is provided on the inner wall of the third valve chamber, and the main valve control air inlet connects the air-controlled pilot valve and the main valve body.

2. A large-caliber quick-opening valve body assembly according to claim 1, characterized in that: The air-controlled pilot valve also includes a discharge orifice plate arranged at the end of the fourth valve cavity; the discharge orifice plate is connected to the auxiliary valve body through a thread; a plug is provided on the solenoid valve body; a solenoid pilot valve exhaust port is provided in the plug; the vertical cross-section of the air-controlled pilot valve control gas inlet channel is V-shaped.

3. A large-caliber quick-opening valve body assembly according to claim 1, characterized in that: An air-controlled spring cavity is provided at the upper end of the air-controlled pilot valve core; the air-controlled pilot valve spring is arranged in the air-controlled spring cavity; a unloading ring is arranged in the air-controlled spring cavity, and the unloading ring is arranged at the upper end of the air-controlled pilot valve core; a cover plate is arranged at the upper end of the unloading ring; the cover plate is mounted on the auxiliary valve body by screws; a drainage hole is provided on the air-controlled pilot valve core, and the drainage hole is connected with the air-controlled spring cavity at the upper end of the air-controlled pilot valve core; the control air inlet channel is connected with the air-controlled spring cavity through the drainage hole.

4. A large-caliber quick-opening valve body assembly according to any one of claims 1 to 3, characterized in that: The main valve core is connected to an adjusting mechanism, which includes a valve stem connected to the main valve core, and the valve stem is connected to a piston; a main valve control air inlet is provided on the main valve body; the main valve control air inlet is arranged in the area between the main valve core and the piston.

5. A large-caliber quick-opening valve body assembly according to claim 4, characterized in that: A piston sleeve is provided in the valve core cavity; the vertical cross-section of the piston sleeve is H-shaped; the piston sleeve includes a sleeve body, in which a partition plate is provided; the valve stem passes through the partition plate and is connected to the piston below the partition plate; the piston is arranged inside the sleeve body; the main valve control air inlet passes through the sleeve body and extends to the inner side of the sleeve body; the piston, the partition plate and the sleeve body form a main valve control chamber.

6. A large-caliber quick-opening valve body assembly according to claim 5, characterized in that: A return spring is sleeved on the valve stem, one end of the return spring is connected to the main valve core, and the other end is pressed against the partition plate of the piston sleeve; a reflux hole is provided on the main valve body, and the main valve core, the piston sleeve and the partition plate constitute a main valve spring installation chamber; the reflux hole is communicated with the main valve spring installation chamber.

7. A large-caliber quick-opening valve body assembly according to claim 1, characterized in that: The main valve body is connected to the main valve body through a guide part, the guide part includes a guide column arranged on the main valve body, the main valve body is provided with a guide hole, the guide column is inserted in the guide hole; a second friction reducing ring is arranged between the guide column and the guide hole.

8. A large-caliber quick-opening valve body assembly according to claim 1, characterized in that: The medium outlet channel is an arc-shaped pipeline; the central axis of the medium outlet channel is 45 degrees to the movement direction of the main valve.

Images