Large-diameter vacuum high-pressure control valve

Abstract

The application discloses a large-diameter vacuum high-pressure control valve, comprising: a valve seat of a hexahedral structure; a piston and a valve core assembly arranged in the valve seat; wherein, a cavity matched with each face of the valve seat is arranged below each face, and the cavities are communicated in space through matched holes; each cavity is configured to comprise: a piston assembly mounting cavity, a valve core assembly mounting cavity, a low-pressure exhaust cavity, a high-pressure intake cavity, a pressure sensor assembly mounting cavity and an electromagnetic valve core assembly mounting cavity. The application provides a large-diameter vacuum high-pressure control valve, through structural design of the valve seat, all executing mechanisms realizing the function of the automatic control valve are integrated on a six-way valve seat, integrated machining and manufacturing can be completed, machining precision is easy to guarantee, the technology is mature, difficulty is small, cost is low, quality is easy to control in the machining process, and better adaptability is achieved.

Description

Technical Field

[0001] This invention relates to the field of mechanical design and manufacturing. More specifically, this invention relates to a large-diameter vacuum high-pressure control valve with working pressures covering both vacuum and high pressure, primarily used for the automatic control of high-flow-rate, high-pressure fluid transportation processes. Background Technology

[0002] In the field of hydrogen energy applications, the safe transportation of large quantities of high-pressure hydrogen is involved, with hydrogen pressure potentially reaching 10 MPa. There are two main types of valves used for the automatic control of large-flow, high-pressure gas transportation: electric shut-off valves and pilot valves.

[0003] Electric gate valves primarily use a geared motor to drive the valve core up and down, closing or opening the valve. A packing seal is used to seal the valve stem, achieving a seal between the valve body and the external air medium. The advantage of this type of valve is that it can operate under both high pressure and vacuum. However, a typical disadvantage is the high energy consumption of the geared motor driving the valve stem's up-and-down movement due to the packing's gripping effect. Furthermore, using a packing seal makes it difficult to achieve a vacuum helium leakage rate of 1×10⁻⁶. -6 P·m 3 ·s -1 The leakage rate level is insufficient to meet the 1×10⁻⁶ requirement for high-pressure / high-flow-rate hydrogen delivery. -9 P·m 3 ·s -1 The low leakage rate requirement for hydrogen safety necessitates this. There are also bellows-operated electric valves that use high-pressure bellows as the valve body seal; although the leakage rate of bellows-operated electric valves can be as low as 1×10⁻⁶. -9 P·m 3 ·s -1 However, bellows electric valves cannot withstand 10MPa high pressure.

[0004] Pilot valves utilize their own high-pressure gas as the power source for opening and closing. Their advantages include energy efficiency, ease of automation, very low energy consumption, and a leakage rate that is easily kept below 1×10⁻⁶. -9 P·m 3 ·s -1 However, a typical drawback of this type of valve is that it cannot open when the working pressure drops to a certain value. This limitation, that it cannot open across the entire working pressure range, restricts its application, particularly in the transport of high-purity / high-pressure / high-flow-rate hydrogen.

[0005] However, regardless of the type of valve used, there is a common problem in practical applications: the fit between the actuator and the valve. The separate design of the actuator and the valve makes it difficult to control the manufacturing precision and quality of the process, which in turn affects the stability of the equipment. Summary of the Invention

[0006] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0007] To achieve these objectives and other advantages according to the present invention, a large-diameter vacuum high-pressure control valve is provided, comprising:

[0008] A valve seat with a hexahedral structure;

[0009] The piston and valve core assembly is located within the valve seat;

[0010] Each side of the valve seat has a corresponding chamber below it, and the chambers are connected in space through corresponding channels.

[0011] Each chamber is configured to include:

[0012] The piston assembly mounting chamber and the valve core assembly mounting chamber are spatially opposite to each other to define the piston and valve core assembly.

[0013] The low-pressure exhaust chamber and high-pressure intake chamber are arranged opposite each other in space and are connected to the piston assembly mounting chamber and the valve core assembly mounting chamber.

[0014] The pressure sensor assembly mounting chamber and the solenoid valve core assembly mounting chamber are arranged opposite each other in space.

[0015] Preferably, the channel is configured to include:

[0016] The valve seat is also provided with a first gas communication hole that connects the upper part of the piston assembly mounting chamber and the solenoid valve core assembly mounting chamber.

[0017] A second gas communication channel connecting the pressure sensor mounting chamber and the valve core mounting chamber;

[0018] A third gas communication channel connects the solenoid valve core assembly mounting chamber to the valve core mounting chamber, and the solenoid valve core assembly mounting chamber has a tapered hole coaxial with the third gas communication channel at one end near the third gas communication channel.

[0019] A fourth gas communication channel connects the lower part of the solenoid valve core assembly mounting chamber with the low-pressure exhaust chamber and the piston assembly mounting chamber.

[0020] The piston assembly mounting chamber is spatially divided into an upper chamber and a lower chamber by the piston.

[0021] The upper chamber is connected to the solenoid valve core assembly mounting chamber via a first gas communication channel; the lower chamber is configured to connect to the low-pressure exhaust chamber.

[0022] The solenoid valve core assembly mounting chamber is connected to the low-pressure exhaust chamber through a third gas communication channel.

[0023] The piston assembly mounting cylinder is connected to the solenoid valve core assembly mounting chamber via a third gas communication channel.

[0024] Preferably, a linkage switch valve core assembly mounting chamber that is connected to the fourth gas communication channel is also provided next to the solenoid valve core assembly mounting chamber.

[0025] Preferably, the piston assembly mounting chamber is coaxial with the valve core mounting chamber; the solenoid valve core assembly mounting chamber is coaxial with the pressure sensor mounting chamber; and the low-pressure exhaust chamber is coaxial with the high-pressure intake chamber.

[0026] The solenoid valve core assembly mounting chamber and the pressure sensor mounting chamber have a first coaxial line, and the low-pressure exhaust chamber and the high-pressure intake chamber have a second coaxial line.

[0027] In space, the first coaxial line is located below the second coaxial line, and the distance between the two is configured to be between 5mm and 10mm.

[0028] Preferably, the piston and valve assembly is configured to include:

[0029] The piston that mates with the piston assembly mounting chamber has piston rings on the side that mates with the side wall of the piston assembly mounting chamber.

[0030] The first valve core, which mates with one end of the piston, has a sealing ring on its side wall that mates with the end face of the low-pressure exhaust chamber.

[0031] A first elastic element is disposed at the free end of the first valve core and spatially cooperates with the valve core mounting chamber;

[0032] The cross-sectional area of ​​the piston is configured to be larger than the cross-sectional area of ​​the first valve core.

[0033] Preferably, it also includes an electrically operated switching mechanism that cooperates with the piston assembly, which is configured to include:

[0034] The first mounting flange that mates with the valve seat has a first screw at its center that is connected to the geared motor drive;

[0035] The screw sleeve has one end connected to the output end of the geared motor, and the other end connected to the first screw through a thread;

[0036] A bellows fixedly installed between the first screw and the first mounting flange;

[0037] The geared motor is connected to the first mounting flange via a matching second screw.

[0038] The screw sleeve is connected to the output end of the geared motor by a matching anti-rotation screw, and a second elastic element is provided at the lower end of the first screw at the position where it mates with the piston assembly.

[0039] A matching anti-rotation key is provided at the position where the first screw contacts the first mounting flange;

[0040] When the geared motor rotates forward, the downward extension length of the first screw is the sum of the thread height on the first screw and the thread height on the screw sleeve. When the motor rotates in reverse, the upward retraction length of the first screw is equal to the sum of the thread height on the first screw and the thread height on the screw sleeve.

[0041] The bellows is in a contracted state under high pressure, and the pressure bearing capacity of the bellows in the contracted state is configured to be greater than or equal to 10 MPa.

[0042] Preferably, it also includes a safety valve mounting seat assembly that mates with the valve core assembly mounting chamber, which is configured to include:

[0043] The second mounting flange that mates with the valve seat has a matching first gasket on its end face that contacts the valve seat;

[0044] A second valve core and a top block that mate with the second valve core are provided on the second mounting flange, and a first valve ball that mates with the second valve core and the top block is provided between the second valve core and the top block;

[0045] The top block and the second valve core are provided with a second gas communication channel that cooperates with the first gas channel, and the top block is provided with a third elastic element at the position that cooperates with the first gas channel.

[0046] The second valve core is provided with a first pin that cooperates with the first valve ball in the first gas passage, and a first sealing gasket that cooperates with the first pin is provided around the first pin.

[0047] Preferably, the pressure sensor mounting assembly that mates with the pressure sensor assembly is configured to include:

[0048] A fixed seat is provided in the valve core assembly mounting chamber and connected to the first elastic element;

[0049] A third mounting flange that mates with the fixed base;

[0050] The fixed base and the third mounting flange are provided with a second gas passage that communicates with the valve core assembly mounting chamber;

[0051] A second valve ball that mates with the second gas passage is provided between the fixed base and the third mounting flange;

[0052] The third mounting flange is provided with a second ejector pin that mates with the second valve ball in the second gas passage, and a second sealing gasket is provided around the second ejector pin.

[0053] Preferably, it also includes a valve magnetic switch assembly that mates with the mounting chamber of the solenoid valve core assembly, which is configured to include:

[0054] The third valve core is installed in the mounting chamber of the solenoid valve core assembly;

[0055] The magnetic suction ring that cooperates with the third valve core has its free end connected to the electromagnet mechanism;

[0056] A pressure plate is positioned between the magnetic suction ring and the valve seat;

[0057] A fourth elastic element is provided between the third valve core and the pressure plate;

[0058] The electromagnet mechanism is configured to include an electromagnet and an upper flange and a lower flange that cooperate with it, and a diaphragm that cooperates with the upper flange and the lower flange is also provided.

[0059] The upper flange, diaphragm, and lower flange are configured to be made of the same metal material, and the thickness of the diaphragm is configured to be between 0.1 and 0.2 mm.

[0060] Preferably, it also includes an interlocking switch valve core assembly that mates with the interlocking switch valve core assembly mounting chamber, which is configured to include:

[0061] Valve stem that mates with the pressure plate;

[0062] A fourth valve core, which is sleeved on the outside of the valve stem and cooperates with the side wall of the installation chamber of the linkage switch valve core assembly;

[0063] The valve hammer, which cooperates with the fourth valve core, has a fifth elastic element between it and the fourth gas communication channel.

[0064] The present invention has at least the following beneficial effects:

[0065] Firstly, this invention designs the valve seat with a hexahedral structure, which provides chambers to accommodate various actuators. Simultaneously, gas channels connect these chambers, enabling the actuators to work together. This integrates all the actuators that perform the automatic control valve function onto a single six-way valve seat, allowing for integrated manufacturing during application. Manufacturing precision is easily guaranteed, the technology is mature, the difficulty is low, the cost is low, and the quality of the manufacturing process is easily controlled.

[0066] Secondly, to address the problem of pilot valves failing to operate under vacuum, this invention integrates an electrically driven actuator sealed by a bellows onto the same valve body. This actuator only operates when the working pressure is below 0.1 MPa. This invention utilizes the characteristic that the welded bellows can withstand high pressures of 10 MPa in its contracted state. When the valve operates at high pressure, the welded bellows is in a contracted state. That is, when the pressure is above 0.1 MPa, the valve is opened / closed using the pilot valve principle; when the pressure is below 0.1 MPa, the valve is opened / closed using the bellows valve principle.

[0067] Thirdly, this invention is based on the pilot valve principle. A small-diameter solenoid valve controlled by electromagnetic force is used. When the solenoid valve is energized, it opens the passage connecting the high-pressure and low-pressure ends of the valve, introducing a small amount of high-pressure gas into the closed cavity formed by the piston and cylinder. The high-pressure gas pushes the piston downwards, automatically opening the valve. When the solenoid valve is de-energized, the passage connecting the high-pressure and low-pressure ends is closed. Simultaneously, a synchronous venting valve integrated within the valve cavity releases the high-pressure gas from the closed cavity to the low-pressure end of the valve. The spring force within the valve pushes the valve core upwards, automatically closing the valve.

[0068] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of the AA-direction structure of a large-diameter vacuum high-pressure control valve in one embodiment of the present invention;

[0070] Figure 2 for Figure 1 Schematic diagram of the BB-direction structure;

[0071] Figure 3 for Figure 1 A schematic diagram of the CC-direction structure;

[0072] Figure 4 for Figure 1 A schematic diagram of the AA-direction structure of the middle valve seat;

[0073] Figure 5 for Figure 1 Schematic diagram of the BB-direction structure of the middle valve seat;

[0074] Figure 6 for Figure 1 Schematic diagram of the CC-direction structure of the middle valve seat;

[0075] Figure 7 for Figure 4 The J-direction view;

[0076] Figure 8 for Figure 5 k-direction view;

[0077] Figure 9 This is a schematic diagram of the structure of the valve seat, piston, and valve core assembly in one embodiment of the present invention;

[0078] Figure 10 for Figure 9 An enlarged schematic diagram of the piston and valve core assembly working together.

[0079] Figure 11 This is a schematic diagram of the structure of the electric switch mechanism in one embodiment of the present invention;

[0080] Figure 12 This is a schematic diagram of the structure of the safety valve mounting bracket assembly and the valve seat in one embodiment of the present invention;

[0081] Figure 13 for Figure 12 Enlarged structural schematic diagram of the safety valve mounting bracket assembly;

[0082] Figure 14 This is a schematic diagram of the structure of the pressure sensor mounting bracket assembly and the valve seat in one embodiment of the present invention;

[0083] Figure 15 for Figure 14 Enlarged structural schematic diagram of the medium pressure sensor mounting bracket assembly;

[0084] Figure 16 This is a schematic diagram of the valve magnetic switch mechanism and valve seat cooperation in one embodiment of the present invention;

[0085] Figure 17 for Figure 16 Enlarged schematic diagram of the magnetic switch mechanism for the central valve;

[0086] Figure 18 for Figure 16 Enlarged structural schematic diagram of the electromagnet mechanism;

[0087] Figure 19 This is a schematic diagram of the structure of the linkage switch valve core assembly and valve seat in one embodiment of the present invention;

[0088] Figure 20 for Figure 19 Enlarged structural diagram of the central linkage switch valve core assembly. Detailed Implementation

[0089] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0090] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0091] It should be noted that in the description of this invention, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0092] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0093] Figure 1-3 An implementation of a large-diameter vacuum high-pressure control valve according to the present invention is shown, comprising: a valve seat (1); an inlet connection flange (2) and an exhaust connection flange (3) disposed on the left and right end faces of the valve seat (1); a piston and valve core assembly (4) disposed within the valve seat (1); an electric switching mechanism (5) connected to the upper end face of the valve seat (1); a safety valve mounting seat assembly (6) connected to the lower end face of the valve seat (1); a pressure sensor mounting seat assembly (7) connected to the lower end face of the valve seat (1); a valve magnetic switching mechanism (8) connected to the front end face of the valve seat (1); and a vent valve assembly (9) disposed in the front chamber of the valve seat (1), the vent valve assembly also referred to as a linkage switch valve core assembly.

[0094] like Figure 4-8 The valve seat (1) has a hexagonal structure, and each end face is provided with a corresponding installation chamber. Corresponding connecting channels are provided between the upper and lower chambers, between the left and right chambers, between the front and right chambers, and between the upper and rear chambers. By controlling the "opening" or "closing" of the corresponding connecting channels, the valve can be opened or closed.

[0095] Specifically Figure 4The diagram shows the structure of the left and right end faces, and the upper and lower end faces of the valve seat (1) in cross-section AA. A low-pressure exhaust connection seat (101) and a low-pressure exhaust chamber (102) are provided on the left end face of the valve seat; a connection seat (103) for the electric switch mechanism (5) and a piston assembly mounting chamber (104) are provided on the upper end face of the valve seat; a high-pressure air intake connection seat (105) and a high-pressure air intake chamber (106) are provided on the right end face of the valve seat; and a safety valve assembly connection seat (107) and a valve core mounting chamber (108) are provided on the lower end face of the valve seat. The low-pressure exhaust chamber (102), piston assembly mounting chamber (104), high-pressure air intake chamber (106), and valve core mounting chamber (108) are interconnected. Each chamber is configured to include:

[0096] Figure 5 This diagram shows the structure of the upper and lower ends, front and rear ends of the valve seat (1) in a BB cross-section. A pressure sensor connector (109) and a pressure sensor assembly mounting chamber (110) are provided on the front end of the valve seat; a valve magnetic switch mechanism connector (111) and a solenoid valve core assembly mounting chamber (112) are provided on the rear end of the valve seat; a gas communication channel (113) is also provided on the upper end of the valve seat (1), which connects the upper part of the piston assembly mounting chamber (104) and the solenoid valve core assembly mounting chamber (112). The pressure sensor mounting chamber (110) is connected to the valve core mounting chamber (108) through a channel (115), and the solenoid valve core assembly mounting chamber (112) is connected to the valve core mounting chamber (108) through a channel (114). A tapered hole (116) coaxial with the channel (114) is provided at one end of the channel (114) near the valve core mounting chamber (108).

[0097] Figure 5 The diagram shows the detailed structure of the solenoid valve core assembly mounting chamber (112) in the CC section of the valve seat (1), which includes a mounting chamber (117) for mounting the linkage switch valve core assembly (also referred to as the vent valve) (9) and a gas communication channel (118). The gas communication channel (118) connects the solenoid valve core assembly mounting chamber (112) to the lower part of the low-pressure exhaust chamber (102) and the piston assembly mounting chamber (104).

[0098] ①The valve seat (1) has a hexahedral structure, and connecting seats and mounting bolt holes are machined on each of the faces;

[0099] ②A chamber is machined below each of the aforementioned surfaces, namely a low-pressure exhaust chamber (102), a piston assembly mounting cylinder (104), a high-pressure intake chamber (106), a valve core mounting cylinder (108), a pressure sensor mounting chamber (110), and a solenoid valve core assembly mounting chamber (112); a linkage switch valve core assembly mounting chamber (117) and a gas communication channel (118) are also provided next to the solenoid valve core assembly mounting chamber (112). The piston assembly mounting cylinder (104) is divided into two sections by a piston. The upper chamber section is connected to the solenoid valve core assembly mounting chamber (112) through a channel (113); the lower chamber section is connected to the low-pressure exhaust chamber (102).

[0100] ③The chambers are all connected by corresponding connecting channels;

[0101] ④ The piston assembly mounting cylinder (104) is coaxial with the valve core mounting cylinder (108); the solenoid valve core assembly mounting chamber (112) is coaxial with the pressure sensor mounting chamber (110); and the low-pressure exhaust chamber (102) is coaxial with the high-pressure intake chamber (106).

[0102] ⑤ The coaxial line b of the solenoid valve core assembly mounting chamber (112) and the pressure sensor mounting chamber (110) is below the coaxial line a of the low-pressure exhaust chamber (102) and the high-pressure intake chamber (106), and the distance between them is between 5mm and 10mm.

[0103] ⑥ The solenoid valve core assembly mounting chamber (112) is connected to the low-pressure exhaust chamber (102) through the gas communication channel (114);

[0104] ⑦ The piston assembly mounting cylinder (104) is connected to the solenoid valve core assembly mounting chamber (112) through the gas communication channel (114);

[0105] In this solution, through the structural design of the valve seat, all the actuators that realize the function of the automatic control valve are integrated into a six-way valve seat (here, six-way means that each chamber is interconnected in space through the matching air passages). It can be manufactured in one piece, the manufacturing precision is easy to guarantee, the technology is mature, the difficulty is low, the cost is low, the quality of the processing process is easy to control, and it has better adaptability.

[0106] like Figure 9-10 In another example, the piston and valve assembly (4) is configured to include:

[0107] A piston (41) that mates with the piston assembly mounting chamber has a piston ring (42) on the side that mates with the side wall of the piston assembly mounting chamber.

[0108] The first valve core (43) that cooperates with one end of the piston has a sealing ring (44) on its side wall that cooperates with the end face of the low-pressure exhaust chamber;

[0109] A first elastic element (45) is disposed at the free end of the first valve core and spatially cooperates with the valve core mounting chamber;

[0110] The operating principle of the piston and valve core assembly (4) is as follows: when the valve is closed, the elastic force of the first elastic element (45) applies upward pressure to the first valve core (43), and the low-pressure exhaust chamber (102) is isolated from the high-pressure intake chamber (106) through the sealing ring (44), blocking the gas flow, and the valve is in the closed state; when high-pressure gas is delivered to the upper chamber of the piston in the chamber (104) through the gas communication channel (113), the piston slides downward, and the downward thrust pushes open the first valve core (43), so that the low-pressure exhaust chamber (102) is connected to the high-pressure intake chamber (106), and the valve is in the open state.

[0111] A typical feature of the piston and valve core assembly (4) of the present invention is that the cross-sectional area of ​​the piston (41) is larger than the cross-sectional area of ​​the first valve core (43); when the valve is under high pressure, the gap between the first screw (56) and the upper end face of the piston (41) is greater than 1 mm.

[0112] like Figure 11 In another instance, an electrically operated switching mechanism (5) cooperating with the piston assembly is also included, which is configured to include:

[0113] The first mounting flange (51) that mates with the valve seat has a first screw (56) at its center that is connected to the geared motor (53) for transmission.

[0114] The screw sleeve (54) has one end connected to the output end of the geared motor (53) and the other end connected to the first screw (56) by a thread.

[0115] A bellows (57) is fixedly installed between the first screw and the first mounting flange. In practical applications, a screw with a welded bellows that can only extend and retract up and down is driven by a screw sleeve that rotates with the main shaft of the geared motor (also known as the output end of the geared motor). When the motor rotates forward, the screw pushes the piston downward to open the valve; when the motor rotates in reverse, the screw moves upward and the valve core is pushed upward by the spring installed inside the valve to close the valve.

[0116] The geared motor is connected to the first mounting flange via a matching second screw (52);

[0117] The screw sleeve is connected to the output end of the geared motor by a matching anti-rotation screw (55), and a second elastic element (58) is provided at the lower end of the first screw at the position that matches the piston assembly;

[0118] A matching anti-rotation key (59) is provided at the position where the first screw contacts the first mounting flange;

[0119] In this scheme, when the geared motor (53) drives the sleeve (54) to rotate in the forward direction, the first screw (56) moves downward and pushes the first valve core (43) downward, so that the low-pressure exhaust chamber (102) and the high-pressure intake chamber (106) are connected and the valve is opened; when the geared motor (53) drives the sleeve (54) to rotate in the reverse direction, the first screw (56) moves upward and the second elastic element (45) pushes the first valve core (43) upward, so that the low-pressure exhaust chamber (102) and the high-pressure intake chamber (106) are disconnected. Furthermore, when the motor rotates in the forward direction, the downward extension length of the first screw (56) is the sum of the thread height on the first screw (56) and the thread height on the sleeve (54), regardless of how long the motor rotates in the forward direction; while when the motor rotates in the reverse direction, the first screw (56) retracts upward; the upward retraction length of the first screw (56) is equal to the sum of the thread height on the first screw (56) and the thread height on the sleeve (54), regardless of how long the motor rotates in the reverse direction.

[0120] Furthermore, the welded bellows (57) is in a fully contracted state under high pressure. In this state, the contracted welded bellows (57) can withstand pressures up to 10 MPa, which meets the pressure resistance requirements of the valve under high pressure conditions.

[0121] In practical applications, the working pressure range is from vacuum to 0.1 MPa, and the valve opening and closing is performed by an electric switching mechanism (5). When the working pressure is higher than 0.1 MPa, the valve opening and closing action is performed by a magnetic switching mechanism (8). The significant advantage of this solution is that it utilizes the characteristic of welded bellows to withstand high pressure in a compressed state, and the working pressure covers vacuum to 10 MPa, solving the problem that the current pilot high-pressure valve cannot open the valve in a vacuum state. By controlling the thread height on the screw sleeve (54) and the thread height of the first screw (56), the vertical movement height of the first screw (56) is controlled, making the valve opening and closing control simpler and eliminating the need for a complex limiting mechanism. Specifically, in order to solve the problem that the current pilot valve cannot work in a vacuum, this solution integrates an electric actuator sealed by a bellows on the same valve body. This electric actuator only works when the working pressure is lower than 0.1 MPa. This invention utilizes the characteristic of welded bellows to withstand high pressure of 10 MPa in a contracted state. When the valve is working at high pressure, the welded bellows is in a contracted state. That is, when the pressure is higher than 0.1MPa, the valve is opened / closed using the pilot valve principle; when the pressure is lower than 0.1MPa, the valve is opened / closed using the bellows valve principle.

[0122] like Figure 12-13 In another instance, a safety valve mounting assembly (6) that mates with the valve core assembly mounting chamber is also included, which is configured to include:

[0123] A second mounting flange (61) that mates with the valve seat has a first gasket (62) that mates with the valve seat on its end face that contacts the valve seat;

[0124] A second valve core (66) and a top block (67) that cooperate with the second valve core are provided on the second mounting flange (61), and a first valve ball (65) that cooperates with the second valve core and the top block is provided between the second valve core and the top block;

[0125] The top block (67) and the second valve core (66) are provided with a second gas communication channel (115) that cooperates with a first gas channel (not shown), and the top block (67) is provided with a third elastic element (68) at the position that cooperates with the first gas channel.

[0126] The second valve core (66) is provided with a first ejector pin (64) that cooperates with the first valve ball (65) in the first gas passage. A first sealing gasket (63) is provided around the first ejector pin (64). The function of the safety valve mounting seat assembly (6) is to enable the safety valve to be easily replaced even when the valve is under high pressure. In actual application, the working process of the safety valve mounting seat assembly (6) is as follows: when the safety valve is connected to the thread on the second mounting flange (61), the safety valve presses down the first ejector pin (64). The first ejector pin (64) applies pressure to the top block (67) through the first valve ball (65), forming a small gap between the first valve ball (65) and the second valve core (66). The gas in the high-pressure chamber (108) is conducted through the channel (115) to open the gas passage of the safety valve. When the safety valve is removed, the third elastic element (68) applies pressure to the first valve ball (65) through the top block (67), closing the small gap between the first valve ball (65) and the second valve core (66), and closing the gas passage of the safety valve. A seal is formed by the first gasket (63) through the threaded connection on the second mounting flange (61).

[0127] like Figure 14-15 In another example, the pressure sensor mounting assembly (7) that mates with the pressure sensor assembly is configured to include:

[0128] A fixed seat (71) is provided in the valve core assembly mounting chamber and connected to the first elastic element;

[0129] A third mounting flange (74) that mates with the fixed base (71);

[0130] The fixed base (71) and the third mounting flange (74) are provided with a second gas passage that communicates with the valve core assembly mounting chamber;

[0131] A second valve ball (72) that mates with the second gas passage is provided between the fixed base (71) and the third mounting flange (74);

[0132] The third mounting flange (74) has a second ejector pin (75) that mates with the second valve ball (72) in the second gas passage, and a second sealing gasket (73) that mates with the second ejector pin (75) is provided around the second ejector pin (75). The function of the pressure sensor mounting assembly (7) is to facilitate the replacement of the pressure sensor even under high pressure. In practical applications, the working process of the safety valve mounting assembly (7) is as follows: when the pressure sensor is connected to the thread on the third mounting flange (74), the pressure sensor applies downward pressure to the second ejector pin (75), and the second ejector pin (75) applies pressure to the fixed seat (71) through the second valve ball (72), forming a small gap between the valve ball (72) and the third mounting flange (74), thus opening the gas passage. When the safety valve is removed, the first elastic element (45) applies pressure to the second valve ball (72) through the fixed seat (71), closing the small gap between the third mounting flange (74) and the fixed seat (71), thus closing the gas passage. A seal is formed by the second gasket (76) through the threaded connection on the third mounting flange (74).

[0133] like Figure 16-19 In another example, it also includes a valve magnetic switch assembly that mates with the solenoid valve core assembly mounting chamber, which is configured to include:

[0134] The third valve core (86) is installed in the mounting chamber of the solenoid valve core assembly;

[0135] The magnetic suction ring (87) that cooperates with the third valve core (86) has its free end connected to the electromagnet mechanism (81). During installation, the magnetic suction ring and the electromagnet mechanism are fixedly connected through the matching flange (82). The flange (82), the magnetic suction ring and the pressure plate are also equipped with sealing gaskets (83) during installation.

[0136] A pressure plate (84) is set between the magnetic suction ring (87) and the valve seat;

[0137] A fourth elastic element (85) is provided between the third valve core (86) and the pressure plate (84). In actual application, the third valve core (86) forms a sealing structure with the fourth elastic element (85), bolt (88), and the conical surface at one end of the channel (114) to separate the chamber (108) from the chamber (112). The fourth elastic element (85) and the third valve core (86) are installed in the chamber (112) of the six-way valve seat through the pressure plate (84) and bolt (89). The magnetic suction ring (87) is fixed to the third valve core (86) by bolt (88). When working, when the electromagnet is energized, the electromagnetic force lifts the magnetic suction ring (87), and the high-pressure gas in the chamber (108) enters the upper part of the chamber (104) through the channel (114) and the channel (113), pushing the valve core assembly to move downward and opening the valve.

[0138] The electromagnet mechanism (81) is configured to include an electromagnet (811), an upper flange (812) connected to the electromagnet (811), a diaphragm (813), and a lower flange (814). The upper flange (812), diaphragm (813), and lower flange (814) are welded together. A typical structural feature of the electromagnet assembly (81) of the present invention is that the upper flange (812), diaphragm (813), and lower flange (814) are made of the same metal material, such as 316L stainless steel, and the depth of the circumferential weld is 2-3 mm. The thickness of the diaphragm is between 0.1-0.2 mm. To meet the requirements of high-pressure, high-flow-rate gas transportation, this invention adopts the following technical solution: First, based on the pilot valve principle, a small-diameter solenoid valve controlled by electromagnetic force is used. When the solenoid valve is energized, the orifice connecting the high-pressure end and the low-pressure end of the valve is opened, introducing a small amount of high-pressure gas into the closed cavity formed by the piston and cylinder. The high-pressure gas pushes the piston downward, thus automatically opening the valve. When the solenoid valve is de-energized, the orifice connecting the high-pressure end and the low-pressure end of the valve is closed. At the same time, through the synchronous venting valve integrated in the valve cavity, the high-pressure gas in the closed cavity formed by the piston and cylinder is released to the low-pressure end of the valve. Due to the spring force installed in the valve, the valve core is pushed upward, automatically closing the valve.

[0139] like Figure 20 In another instance, it also includes a linkage switch valve core assembly (9) that mates with the linkage switch valve core assembly mounting chamber, which is configured to include:

[0140] Valve stem (91) that mates with the pressure plate;

[0141] A fourth valve core (92) is sleeved on the outside of the valve stem and cooperates with the side wall of the installation chamber of the linkage switch valve core assembly;

[0142] The valve hammer (93), which cooperates with the fourth valve core, has a fifth elastic element (94) between it and the fourth gas communication channel. In practical applications, when the electromagnet assembly (81) is energized, the electromagnetic force attracts the magnetic suction ring (87), and the elastic force of the spring (94) pushes the valve hammer (93) and the valve core (92) to form a channel (118) to separate them.

[0143] When the electromagnet assembly (81) is de-energized, the electromagnetic force attracts the valve and the magnetic force disappears. The suction ring (87) compresses the valve stem (91) downward, and the valve stem (91) pushes open the valve hammer (93) and blocks the passage (118). During operation, when the electromagnet assembly (81) is energized and opens the passage (114), the passage (118) is blocked so that the high-pressure gas pushes the piston downward to open the valve. When the electromagnet assembly (81) is de-energized and blocks the passage (114), the passage (118) is opened so that the high-pressure gas in the upper chamber of the chamber (104) is quickly depressurized and released into the low-pressure chamber (102). Therefore, the valve core (43) moves upward under the thrust of the spring (45) and closes the valve.

[0144] The above solution is merely an illustration of a preferred example and is not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0145] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0146] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A large-diameter vacuum high-pressure control valve, characterized in that, include: A valve seat with a hexahedral structure; The piston and valve core assembly is located within the valve seat; Each side of the valve seat has a corresponding chamber below it, and the chambers are connected in space through corresponding channels. Each chamber is configured to include: The piston assembly mounting chamber and the valve core assembly mounting chamber are spatially opposite to each other to define the piston and valve core assembly. The low-pressure exhaust chamber and high-pressure intake chamber are arranged opposite each other in space and are connected to the piston assembly mounting chamber and the valve core assembly mounting chamber. The pressure sensor assembly mounting chamber and the solenoid valve core assembly mounting chamber are arranged opposite each other in space; The channel is configured to include: The valve seat is also provided with a first gas communication hole that connects the upper part of the piston assembly mounting chamber and the solenoid valve core assembly mounting chamber. A second gas communication channel connecting the pressure sensor mounting chamber and the valve core mounting chamber; A third gas communication channel connects the solenoid valve core assembly mounting chamber to the valve core mounting chamber, and the solenoid valve core assembly mounting chamber has a tapered hole coaxial with the third gas communication channel at one end near the third gas communication channel. A fourth gas communication channel connects the lower part of the solenoid valve core assembly mounting chamber with the low-pressure exhaust chamber and the piston assembly mounting chamber. The piston assembly mounting chamber is spatially divided into an upper chamber and a lower chamber by the piston. The upper chamber is connected to the solenoid valve core assembly mounting chamber via a first gas communication channel; the lower chamber is configured to connect to the low-pressure exhaust chamber. The solenoid valve core assembly mounting chamber is connected to the low-pressure exhaust chamber through a third gas communication channel. The piston assembly mounting chamber is connected to the solenoid valve core assembly mounting chamber via a third gas communication channel.

2. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, Next to the solenoid valve core assembly mounting chamber, there is also a linkage switch valve core assembly mounting chamber that is connected to the fourth gas communication channel.

3. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, The piston assembly mounting chamber is coaxial with the valve core mounting chamber; the solenoid valve core assembly mounting chamber is coaxial with the pressure sensor mounting chamber; and the low-pressure exhaust chamber is coaxial with the high-pressure intake chamber. The solenoid valve core assembly mounting chamber and the pressure sensor mounting chamber have a first coaxial line, and the low-pressure exhaust chamber and the high-pressure intake chamber have a second coaxial line. In space, the first coaxial line is located below the second coaxial line, and the distance between the two is configured to be between 5mm and 10mm.

4. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, The piston and valve assembly is configured to include: The piston that mates with the piston assembly mounting chamber has piston rings on the side that mates with the side wall of the piston assembly mounting chamber. The first valve core, which mates with one end of the piston, has a sealing ring on its side wall that mates with the end face of the low-pressure exhaust chamber. A first elastic element is disposed at the free end of the first valve core and spatially cooperates with the valve core mounting chamber; The cross-sectional area of ​​the piston is configured to be larger than the cross-sectional area of ​​the first valve core.

5. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, It also includes an electrically operated switching mechanism that cooperates with the piston assembly, which is configured to include: The first mounting flange that mates with the valve seat has a first screw at its center that is connected to the geared motor drive; The screw sleeve has one end connected to the output end of the geared motor, and the other end connected to the first screw through a thread; A bellows fixedly installed between the first screw and the first mounting flange; The geared motor is connected to the first mounting flange via a matching second screw. The screw sleeve is connected to the output end of the geared motor by a matching anti-rotation screw, and a second elastic element is provided at the lower end of the first screw at the position where it mates with the piston assembly. A matching anti-rotation key is provided at the position where the first screw contacts the first mounting flange; When the geared motor rotates forward, the downward extension length of the first screw is the sum of the thread height on the first screw and the thread height on the screw sleeve. When the motor rotates in reverse, the upward retraction length of the first screw is equal to the sum of the thread height on the first screw and the thread height on the screw sleeve. The bellows is in a contracted state under high pressure, and the pressure bearing capacity of the bellows in the contracted state is configured to be greater than or equal to 10 MPa.

6. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, It also includes a safety valve mounting assembly that mates with the valve core assembly mounting chamber, which is configured to include: The second mounting flange that mates with the valve seat has a matching first gasket on its end face that contacts the valve seat; A second valve core and a top block that mate with the second valve core are provided on the second mounting flange, and a first valve ball that mates with the second valve core and the top block is provided between the second valve core and the top block; The top block and the second valve core are provided with a second gas communication channel that cooperates with the first gas channel, and the top block is provided with a third elastic element at the position that cooperates with the first gas channel. The second valve core is provided with a first pin that cooperates with the first valve ball in the first gas passage, and a first sealing gasket that cooperates with the first pin is provided around the first pin.

7. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, A pressure sensor mounting assembly that mates with a pressure sensor assembly is configured to include: A fixed seat is provided in the valve core assembly mounting chamber and connected to the first elastic element; A third mounting flange that mates with the fixed base; The fixed base and the third mounting flange are provided with a second gas passage that communicates with the valve core assembly mounting chamber; A second valve ball that mates with the second gas passage is provided between the fixed base and the third mounting flange; The third mounting flange is provided with a second ejector pin that mates with the second valve ball in the second gas passage, and a second sealing gasket is provided around the second ejector pin.

8. The large-diameter vacuum high-pressure control valve as described in claim 1, characterized in that, It also includes a valve magnetic switch assembly that mates with the mounting chamber of the solenoid valve core assembly, which is configured to include: The third valve core is installed in the mounting chamber of the solenoid valve core assembly; The magnetic suction ring that cooperates with the third valve core has its free end connected to the electromagnet mechanism; A pressure plate is positioned between the magnetic suction ring and the valve seat; A fourth elastic element is provided between the third valve core and the pressure plate; The electromagnet mechanism is configured to include an electromagnet and an upper flange and a lower flange that cooperate with it, and a diaphragm that cooperates between the upper flange and the lower flange is also provided. The upper flange, diaphragm, and lower flange are configured to be made of the same metal material, and the thickness of the diaphragm is configured to be between 0.1 and 0.2 mm.

9. The large-diameter vacuum high-pressure control valve as described in claim 8, characterized in that, It also includes a linkage switch valve core assembly that mates with the mounting chamber of the linkage switch valve core assembly, which is configured to include: Valve stem that mates with the pressure plate; A fourth valve core, which is sleeved on the outside of the valve stem and cooperates with the side wall of the installation chamber of the linkage switch valve core assembly; The valve hammer, which cooperates with the fourth valve core, has a fifth elastic element between it and the fourth gas communication channel.

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