A pilot-operated high-pressure air pressure reducing valve

Abstract

The present invention relates to a pilot-operated high-pressure air pressure reducing valve, comprising a pressure reducing valve body, an air inlet connecting pipe and an air outlet connecting pipe which are oppositely arranged on both sides of the pressure reducing valve body, a cylinder head arranged at the top of the pressure reducing valve body, two groups of oil flow pipes arranged symmetrically on both sides of the pressure reducing valve body and the cylinder head, and the oil flow pipes connect the bottom end of the pressure reducing valve body and the top side of the cylinder head, a main shaft valve core member is arranged at the center of the pressure reducing valve body and the cylinder head, and an adjusting wrench is connected to the top of the main shaft valve core member. The present invention optimizes the setting of the pilot-operated pressure reducing valve, and the structure has a simple central valve member. Simple physical knowledge is used to design air pressure upper top plates and air pressure lower pressure blocks of different sizes, and then the operating principles of the upper and lower sides can also be connected through the oil flow pipe, so that the oil inside can circulate, thereby ensuring the flexibility of the upper and lower sides in the process of pressure reducing work, and it is suitable for promotion.

Description

Technical Field

[0001] The invention relates to the field of pipeline valves, and in particular to a pilot-operated high-pressure air pressure reducing valve. Background Art

[0002] The pilot-operated pressure reducing valve controls the opening of the opening and closing parts in the valve body to adjust the flow rate of the medium and reduce the pressure of the medium. At the same time, the opening of the opening and closing parts is adjusted with the help of the pressure behind the valve to keep the pressure behind the valve within a certain range. When the inlet pressure keeps changing, the outlet pressure is kept within the set range to protect the subsequent life and production equipment. However, the traditional pilot-operated pressure reducing valve has a complex structure, and the economic cost in daily maintenance and production costs is high. In addition, the traditional pressure reducing valve structure is designed with multiple layers of auxiliary valves, which may cause damage to the valve body due to various special circumstances during daily use. In order to solve the above problems, a pilot-operated high-pressure air pressure reducing valve is designed. Summary of the invention

[0003] The purpose of the present invention is to provide a pilot-operated high-pressure air pressure reducing valve to solve the above technical problems. To achieve the above purpose, the present invention adopts the following technical solutions:

[0004] A pilot-operated high-pressure air pressure reducing valve comprises a pressure reducing valve body, a cylinder head, a main shaft valve core part, an adjusting wrench, an oil circulation pipe, an air inlet connecting pipe and an air outlet connecting pipe, wherein the air inlet connecting pipe and the air outlet connecting pipe are oppositely arranged on two sides of the pressure reducing valve body, the cylinder head is arranged at the top of the pressure reducing valve body, two groups of oil circulation pipes are arranged, and the two groups of oil circulation pipes are symmetrically arranged on both sides of the pressure reducing valve body and the cylinder head, and the oil circulation pipes connect the bottom end of the pressure reducing valve body and the top side of the cylinder head, the main shaft valve core part is arranged at the center of the pressure reducing valve body and the cylinder head, and the adjusting wrench is connected to the top of the main shaft valve core part.

[0005] On the basis of the above technical scheme, the interior of the pressure reducing valve body is provided with an upper valve core active chamber, a lower valve core shifting port, an air outlet circulation chamber, a lower valve core sealing port, and a lower valve core parking chamber; the cylinder head is provided with an upper oil liquid chamber, the interior of the air intake connecting pipe is provided with an air intake oblique channel, the interior of the air outlet connecting pipe is provided with an air outlet straight channel, the upper valve core active chamber is provided on the inner top side of the pressure reducing valve body, the top side of the upper valve core active chamber is connected with the upper oil liquid chamber, the air intake oblique channel is connected to the side bottom end of the upper valve core active chamber, and the lower valve core shifting port is provided on the upper valve The center bottom side of the core active cavity, the air outlet circulation cavity is arranged on the bottom side of the lower valve core shifting port, the lower valve core sealing port is arranged on the bottom side of the air outlet circulation cavity, the lower valve core parking cavity is arranged on the bottom side of the lower valve core sealing port, and the lower valve core parking cavity is arranged on the inner bottom end of the pressure reducing valve body, the air outlet straight channel is connected to the side of the air outlet circulation cavity, and an upper hydraulic pressure is arranged on the inner bottom side of the lower valve core parking cavity, the main shaft valve core component is arranged in the upper valve core active cavity, the lower valve core shifting port, the air outlet circulation cavity, the lower valve core sealing port, the lower valve core parking cavity and the upper oil cavity.

[0006] On the basis of the above technical scheme, the main shaft valve core component is composed of a screw end, a hydraulic cylinder plug, an upper spring, a sliding rod, a pneumatic upper top plate, a middle rod sleeve, a pneumatic lower pressure block, a limiting convex ring, and a lower spring. The screw end is arranged at the top of the sliding rod, the hydraulic cylinder plug is arranged at the outside of the top of the sliding rod, the pneumatic upper top plate is arranged at the top of the middle rod sleeve, and the pneumatic lower pressure block is arranged at the bottom of the middle rod sleeve. The pneumatic upper top plate, the middle rod sleeve, and the pneumatic lower pressure block are integrally formed, and the pneumatic upper top plate, the middle rod sleeve, and the pneumatic lower pressure block are sleeved on the outside of the sliding rod. The cam is formed integrally with the bottom end of the sliding rod, and a volume cavity is provided inside the gas pressure lower pressure block. The cam is arranged in the volume cavity, and the cam can move up and down in the volume cavity. The upper spring is arranged between the oil pressure cylinder plug and the gas pressure upper plate, and the upper spring is sleeved on the outside of the sliding rod. The lower spring is arranged on the bottom side of the gas pressure lower pressure block, and the lower spring is sleeved on the outside of the sliding rod.

[0007] On the basis of the above technical scheme, the screw end is threadedly connected to the inner top side of the cylinder head, and the screw end can be adjusted up and down on the inner top side of the cylinder head, the hydraulic cylinder plug is arranged in the upper oil chamber, and the hydraulic cylinder plug can move up and down in the upper oil chamber, the pneumatic upper top plate is arranged in the upper valve core activity chamber, and the pneumatic upper top plate can move up and down in the upper valve core activity chamber, the pneumatic lower pressure block is arranged in the lower valve core shift port, the air outlet circulation chamber, the lower valve core sealing port, and the lower valve core stop chamber, and the pneumatic lower pressure block can slide up and down in the lower valve core shift port, the air outlet circulation chamber, the lower valve core sealing port, and the lower valve core stop chamber, the lower spring is arranged in the lower valve core stop chamber, the top end of the upper hydraulic pressure contacts the bottom end side of the pneumatic lower pressure block, and the upper oil chamber is connected to the upper hydraulic pressure through an oil circulation pipe.

[0008] Compared with the prior art, the present invention has the following advantages: the present invention optimizes the setting of the pilot pressure reducing valve, changes the traditional complex and multi-layer pressure reducing valve structure, and improves it into a pressure reducing valve with a simple structure. The structure has a simple central valve component, and uses simple physical knowledge to design air pressure upper top plates and air pressure lower pressure blocks of different sizes. Then the operating principles of the upper and lower sides can be connected through an oil circulation pipe so that the oil inside can circulate, thereby ensuring the flexibility of the upper and lower sides during the pressure reducing work process, and it is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a diagram of the overall appearance of the present invention.

[0010] Figure 2 It is a schematic diagram of the side plane structure of the pressure reducing valve body of the present invention.

[0011] Figure 3 It is a side plane schematic diagram of the spindle valve core component of the present invention.

[0012] Figure 4 This is a schematic diagram showing the normal operation of the present invention.

[0013] Figure 5 It is a schematic diagram for implementing the decompression of the present invention.

[0014] Figure 6 This is a schematic diagram of the connection between the pressure reducing cylinder head and the top hydraulic device of the present invention.

[0015] In the figure: pressure reducing valve body 1, cylinder head 2, spindle valve core part 3, adjusting wrench 4, oil circulation pipe 5, air inlet connecting pipe 6, air outlet connecting pipe 7, upper valve core movable chamber 8, lower valve core shifting port 9, air outlet circulation chamber 10, lower valve core sealing port 11, lower valve core stop chamber 12, upper oil chamber 13, air inlet inclined channel 14, air outlet straight channel 15, screw end 16, hydraulic cylinder plug 17, upper spring 18, sliding rod 19, pneumatic upper top plate 20, middle rod sleeve 21, pneumatic lower pressure block 22, limiting convex ring 23, lower spring 24, volume chamber 25, upper hydraulic valve 26. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementations.

[0017] A pilot-operated high-pressure air pressure reducing valve comprises a pressure reducing valve body 1, a cylinder head 2, a spindle valve core part 3, an adjusting wrench 4, an oil circulation pipe 5, an air inlet connecting pipe 6, and an air outlet connecting pipe 7, wherein the air inlet connecting pipe 6 and the air outlet connecting pipe 7 are oppositely arranged on both sides of the pressure reducing valve body 1, the cylinder head 2 is arranged at the top of the pressure reducing valve body 1, and the oil circulation pipe 5 is provided with two groups, and the two groups of oil circulation pipes 5 are symmetrically arranged on both sides of the pressure reducing valve body 1 and the cylinder head 2, and the oil circulation pipe 5 connects the bottom end of the pressure reducing valve body 1 and the top side of the cylinder head 2, the spindle valve core part 3 is arranged at the center of the pressure reducing valve body 1 and the cylinder head 2, and the adjusting wrench 4 is connected to the top of the spindle valve core part 3.

[0018] The pressure reducing valve body 1 is provided with an upper valve core active chamber 8, a lower valve core shifting port 9, an air outlet circulation chamber 10, a lower valve core sealing port 11, and a lower valve core parking chamber 12; the cylinder head 2 is provided with an upper oil chamber 13; the air intake connecting pipe 6 is provided with an air intake oblique channel 14; the air outlet connecting pipe 7 is provided with an air outlet straight channel 15; the upper valve core active chamber 8 is provided on the inner top side of the pressure reducing valve body 1; the top side of the upper valve core active chamber 8 is communicated with the upper oil chamber 13; the air intake oblique channel 14 is communicated with the side bottom end of the upper valve core active chamber 8; the lower valve core shifting port 9 is provided at the center bottom of the upper valve core active chamber 8 On the side, the air outlet circulation chamber 10 is arranged on the bottom side of the lower valve core shift port 9, the lower valve core sealing port 11 is arranged on the bottom side of the air outlet circulation chamber 10, the lower valve core stop chamber 12 is arranged on the bottom side of the lower valve core sealing port 11, and the lower valve core stop chamber 12 is arranged at the inner bottom end of the pressure reducing valve body 1, the air outlet straight channel 15 is connected to the side of the air outlet circulation chamber 10, and the inner bottom side of the lower valve core stop chamber 12 is provided with an upper hydraulic pressure valve 26, and the spindle valve core component 3 is arranged in the upper valve core active chamber 8, the lower valve core shift port 9, the air outlet circulation chamber 10, the lower valve core sealing port 11, the lower valve core stop chamber 12, and the upper oil chamber 13.

[0019] The spindle valve core member 3 is composed of a screw end 16, a hydraulic cylinder plug 17, an upper spring 18, a sliding rod 19, a pneumatic upper top plate 20, a middle rod sleeve 21, a pneumatic lower pressure block 22, a limiting convex ring 23, and a lower spring 24. The screw end 16 is arranged at the top of the sliding rod 19, the hydraulic cylinder plug 17 is arranged on the outside of the top of the sliding rod 19, the pneumatic upper top plate 20 is arranged at the top of the middle rod sleeve 21, and the pneumatic lower pressure block 22 is arranged at the bottom of the middle rod sleeve 21. The pneumatic upper top plate 20, the middle rod sleeve 21, and the pneumatic lower pressure block 22 are integrally formed, and the pneumatic upper top plate 20, the middle rod sleeve 21, and the pneumatic lower pressure block 22 are sleeved on the outside of the sliding rod 19, and the pneumatic The upper top plate 20, the middle rod sleeve 21, and the pneumatic pressing block 22 can slide up and down on the outside of the sliding rod 19. The limiting convex ring 23 is arranged at the bottom end of the sliding rod 19. The screw end 16, the sliding rod 19, and the limiting convex ring 23 are integrally formed. A volume cavity 25 is opened inside the pneumatic pressing block 22. The limiting convex ring 23 is arranged in the volume cavity 25, and the limiting convex ring 23 can move up and down in the volume cavity 25. The upper spring 18 is arranged between the oil pressure cylinder plug 17 and the pneumatic upper top plate 20, and the upper spring 18 is sleeved on the outside of the sliding rod 19. The lower spring 24 is arranged on the bottom side of the pneumatic pressing block 22, and the lower spring 24 is sleeved on the outside of the sliding rod 19.

[0020] The screw end 16 is threadedly connected to the inner top side of the cylinder head 2, and the screw end 16 can be adjusted up and down on the inner top side of the cylinder head 2. The hydraulic cylinder plug 17 is arranged in the upper oil chamber 13, and the hydraulic cylinder plug 17 can move up and down in the upper oil chamber 13. The pneumatic upper top plate 20 is arranged in the upper valve core activity chamber 8, and the pneumatic upper top plate 20 can move up and down in the upper valve core activity chamber 8. The pneumatic lower pressure block 22 is arranged at the lower valve core shift port 9, the outlet port 10, and the outlet port 11. The air flow cavity 10, the lower valve core sealing port 11, and the lower valve core stop cavity 12, and the air pressure pressing block can slide up and down in the lower valve core shift port 9, the air outlet flow cavity 10, the lower valve core sealing port 11, and the lower valve core stop cavity 12, the lower spring 24 is arranged in the lower valve core stop cavity 12, the top end of the upper hydraulic pressure block 26 contacts the bottom side of the air pressure pressing block 22, and the upper oil cavity 13 is connected to the upper hydraulic pressure block 26 through the oil flow pipe 5.

[0021] Working principle of the present invention: The working principle of the pressure reducing valve is to utilize that under the same pressure conditions, the larger the contact area, the greater the pressure, so in the same environment, different contact areas are formed between the air pressure upper top plate and the air pressure lower pressure block, so that the direction of the structure will be the direction with the larger contact area.

[0022] When the gas enters the upper valve core active cavity through the intake inclined channel, under the positive pressure environment, the upper spring on the upper side of the gas pressure upper top plate and the lower spring on the lower side of the gas pressure lower pressure block will offset the weak pressure. However, when the gas pressure is extremely unstable, the gas pressure upper top plate with a large contact area will be pushed upward by the gas pressure. Because the gas pressure lower pressure block is integrated with the gas pressure upper top plate, the gas pressure lower pressure block slides out of the lower valve core stop cavity and slides upward along the sliding rod. It will first slide to the gas outlet circulation cavity. At this time, the gas in the gas outlet circulation cavity can also pass normally through the lower valve core shift port. When the gas pressure lower pressure block continues to move, the gas pressure lower pressure block seals the lower valve core shift port and cuts off the connection between the upper valve core active cavity and the gas outlet circulation cavity to reduce the influence of the high gas pressure at the intake end on the gas outlet end. The upper oil chambers and the upper hydraulic valves on the upper and lower sides play a certain buffering role to reduce the damage of the high gas pressure to the entire pressure reducing valve body during the process of pushing the gas pressure upper top plate.

[0023] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A pilot-operated high-pressure air pressure reducing valve, characterized in that: The invention comprises a pressure reducing valve body (1), a cylinder head (2), a main shaft valve core component (3), an adjusting wrench (4), an oil flow pipe (5), an air inlet connecting pipe (6), and an air outlet connecting pipe (7), wherein the air inlet connecting pipe (6) and the air outlet connecting pipe (7) are arranged on opposite sides of the pressure reducing valve body (1), the cylinder head (2) is arranged at the top of the pressure reducing valve body (1), two groups of oil flow pipes (5) are arranged, and the two groups of oil flow pipes (5) are symmetrically arranged on both sides of the pressure reducing valve body (1) and the cylinder head (2), and the oil flow pipes (5) are connected to the bottom end of the pressure reducing valve body (1) and the top side of the cylinder head (2), the main shaft valve core component (3) is arranged at the center of the pressure reducing valve body (1) and the cylinder head (2), and the adjusting wrench (4) is connected to the pressure reducing valve body (1) and the top side of the cylinder head (2). The pressure reducing valve body (1) is connected to the top end of the main shaft valve core member (3). An upper valve core activity chamber (8), a lower valve core shift port (9), an air outlet circulation chamber (10), a lower valve core sealing port (11), and a lower valve core stop chamber (12) are provided inside the pressure reducing valve body (1). An upper oil chamber (13) is provided inside the oil cylinder head (2). An air intake oblique passage (14) is provided inside the air intake connecting pipe (6). An air outlet straight passage (15) is provided inside the air outlet connecting pipe (7). The upper valve core activity chamber (8) is provided on the inner top side of the pressure reducing valve body (1). The top side of the upper valve core activity chamber (8) is communicated with the upper oil chamber (13). The air intake oblique passage (14) is communicated with the side bottom end of the upper valve core activity chamber (8). The lower valve core shift port (9) is provided with a The valve body (1) is provided at the central bottom side of the upper valve core movable chamber (8), the air outlet circulation chamber (10) is provided at the bottom side of the lower valve core shifting port (9), the lower valve core sealing port (11) is provided at the bottom side of the air outlet circulation chamber (10), the lower valve core stop chamber (12) is provided at the bottom side of the lower valve core sealing port (11), and the lower valve core stop chamber (12) is provided at the inner bottom end of the pressure reducing valve body (1), the air outlet straight channel (15) is connected to the side of the air outlet circulation chamber (10), the inner bottom side of the lower valve core stop chamber (12) is provided with an upper hydraulic pressure device (26), and the main shaft valve core member (3) is provided at the upper valve core movable chamber (8), the lower valve core shifting port (9), the air outlet circulation chamber (10), the lower valve core sealing port (11), the lower valve core stop chamber ( 12), in the upper oil chamber (13), the main shaft valve core member (3) is composed of a screw end (16), a hydraulic cylinder plug (17), an upper spring (18), a sliding rod (19), a pneumatic upper top plate (20), a middle rod sleeve (21), a pneumatic lower pressure block (22), a limiting convex ring (23), and a lower spring (24), wherein the screw end (16) is arranged at the top end of the sliding rod (19), the hydraulic cylinder plug (17) is arranged at the outside of the top end of the sliding rod (19), the pneumatic upper top plate (20) is arranged at the top end of the middle rod sleeve (21), and the pneumatic lower pressure block (22) is arranged at the bottom end of the middle rod sleeve (21), and the pneumatic upper top plate (20), the middle rod sleeve (21), and the pneumatic lower pressure block (22) are integrally formed.The pneumatic upper top plate (20), the middle rod sleeve (21), and the pneumatic lower pressing block (22) are sleeved on the outer side of the sliding rod (19), and the pneumatic upper top plate (20), the middle rod sleeve (21), and the pneumatic lower pressing block (22) can slide up and down on the outer side of the sliding rod (19); the limiting convex ring (23) is arranged at the bottom end of the sliding rod (19); the screw rod end (16), the sliding rod (19), and the limiting convex ring (23) are integrally formed; and a volume cavity (25) is provided inside the pneumatic lower pressing block (22). The limiting convex ring (23) is arranged in the volume chamber (25), and the limiting convex ring (23) can move up and down in the volume chamber (25); the upper spring (18) is arranged between the oil pressure cylinder plug (17) and the gas pressure upper top plate (20), and the upper spring (18) is sleeved on the outside of the sliding rod (19); the lower spring (24) is arranged on the bottom side of the gas pressure lower pressure block (22), and the lower spring (24) is sleeved on the outside of the sliding rod (19); the screw rod end (16) is threadedly connected to the oil cylinder The inner top side of the oil cylinder head (2), and the screw end (16) can be adjusted up and down on the inner top side of the oil cylinder head (2), the oil pressure cylinder plug (17) is arranged in the upper oil chamber (13), and the oil pressure cylinder plug (17) can move up and down in the upper oil chamber (13), the air pressure upper top plate (20) is arranged in the upper valve core movable chamber (8), and the air pressure upper top plate (20) can move up and down in the upper valve core movable chamber (8), and the air pressure lower pressure block (22) is arranged at the lower valve core shift port (9) and the air outlet flow chamber (10) , the lower valve core sealing opening (11), the lower valve core stop cavity (12), and the air pressure pressing block can slide up and down in the lower valve core shift opening (9), the air outlet circulation cavity (10), the lower valve core sealing opening (11), and the lower valve core stop cavity (12), the lower spring (24) is arranged in the lower valve core stop cavity (12), the top end of the upper hydraulic pressure valve (26) contacts the bottom side of the air pressure pressing block (22), and the upper oil cavity (13) is connected to the upper hydraulic pressure valve (26) through the oil circulation pipe (5); The pressure reducing valve utilizes the fact that under the same pressure condition, the larger the contact area, the greater the pressure, thus forming different contact areas between the air pressure upper top plate and the air pressure lower pressure block in the same environment, so that the direction of the structure will be the direction with the larger contact area; When the gas enters the upper valve core active cavity through the intake inclined channel, under the positive pressure environment, the upper spring on the upper side of the gas pressure upper top plate and the lower spring on the lower side of the gas pressure lower pressure block will offset the weak pressure. When the gas pressure is extremely unstable, the gas pressure upper top plate with a large contact area will be pushed upward by the gas pressure. The gas pressure lower pressure block is integrated with the gas pressure upper top plate, forming the gas pressure lower pressure block sliding out of the lower valve core stop cavity and sliding upward along the sliding rod. It will first slide to the gas outlet circulation cavity. At this time, the gas in the gas outlet circulation cavity passes normally through the lower valve core shift port. When the gas pressure lower pressure block continues to move, the gas pressure lower pressure block will close the lower valve core shift port and cut off the connection between the upper valve core active cavity and the gas outlet circulation cavity to reduce the influence of the high gas pressure at the intake end on the gas outlet end. The upper oil chamber and the upper hydraulic valve on the upper and lower sides play a buffering role to reduce the damage of the high gas pressure to the entire pressure reducing valve body during the process of pushing the gas pressure upper top plate.

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