Quick-opening stop valve

Abstract

The utility model discloses a quick-opening stop valve which comprises a valve body, a valve rod and an executing mechanism, a medium channel, an inlet and an outlet are arranged in the valve body, the inlet and the outlet are communicated with the medium channel, the executing mechanism comprises a first cylinder body assembly and a second cylinder body assembly, and the first cylinder body assembly comprises a high-pressure cylinder body used for driving the valve rod to ascend and descend. An auxiliary valve is connected between the first cylinder body assembly and the second cylinder body assembly, a first exhaust channel is formed in the auxiliary valve, a high-pressure air inlet communicated with an air source and a high-pressure exhaust port communicated with the first exhaust channel are formed in the high-pressure air cylinder body, and the second cylinder body assembly comprises a low-pressure air cylinder body used for opening and closing the high-pressure exhaust port. A high-pressure and low-pressure double-cylinder double-discharge and auxiliary valve structure is adopted, the medium channel is closed by the valve rod through air intake of the high-pressure cylinder body, the high-pressure exhaust port is controlled to be opened and closed by the low-pressure cylinder body, a high-pressure air source is discharged from the independent auxiliary valve during exhaust, the exhaust channel is larger, the exhaust speed is high, and therefore quick opening of the valve is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a quick-opening stop valve. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. They can also be divided into ball valves, butterfly valves, gate valves, etc. according to the type of their opening parts. The stop valve is a valve with a short opening and closing part stroke, and the opening and closing part moves along the center line of the valve body. According to this movement form of the opening and closing part, the size change of the middle through hole of the valve body is in direct proportion to the opening and closing part stroke, so it is very suitable for regulating the flow. At the same time, due to the short stroke of its opening and closing part, it can also quickly close the through hole in the middle of the valve body through the opening and closing part when the valve needs to be closed, and the cut-off speed is very fast.

[0003] Existing stop valves usually use electric actuators to control the lifting of the valve stem. The electric opening method can meet general usage scenarios, but it cannot meet usage scenarios with high requirements for fast opening time. Therefore, it is necessary to shorten the opening time of the stop valve. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a quick-opening stop valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quick-opening stop valve, comprising a valve body and a valve stem, wherein the valve body is provided with a medium channel, an inlet and an outlet connected to the medium channel, and an actuator for driving the valve stem to rise and fall so as to open or close the medium channel, the actuator comprising a first cylinder assembly and a second cylinder assembly, the first cylinder assembly comprising a high-pressure cylinder body for driving the valve stem to rise and fall, an auxiliary valve being connected between the first cylinder assembly and the second cylinder assembly, a first exhaust channel being provided in the auxiliary valve, a high-pressure air inlet connected to an air source and a high-pressure exhaust port connected to the first exhaust channel being provided on the high-pressure cylinder body, and the second cylinder assembly comprising a low-pressure cylinder body for opening and closing the high-pressure exhaust port; the angle between the central axis of the valve stem and the central axis of the medium channel is 30°-45°, a valve port connected to the medium channel is provided in the valve body, a valve core corresponding to the valve port is provided at the lower end of the valve stem, and an outer wall of the valve core is at least partially provided as a conical surface and the conical surface forms a sealing fit with the valve port.

[0006] As a preferred technical solution of the utility model, a high-pressure cylinder piston is slidably installed in the high-pressure cylinder body, and the high-pressure cylinder piston divides the interior of the high-pressure cylinder body into independent high-pressure air chambers and a first energy storage chamber, and the high-pressure air chamber is connected to a high-pressure air inlet and a high-pressure exhaust port. At least one first energy storage spring is provided in the first energy storage chamber, and the two ends of the first energy storage spring are respectively connected to the bottom wall of the first energy storage chamber and the high-pressure cylinder piston, and the high-pressure cylinder piston is connected to the valve stem.

[0007] As a preferred technical solution of the utility model, the high-pressure cylinder body is provided with a pressure cover located above the high-pressure air chamber, and a first air outlet channel is provided in the pressure cover, one end of the first air outlet channel is connected to the high-pressure air chamber, and the other end of the first air outlet channel is connected to the high-pressure exhaust port.

[0008] As a preferred technical solution of the utility model, at least one high-pressure damping spring is installed on one end surface of the gland located in the high-pressure air chamber, and the lower end of the high-pressure damping spring is separated from the high-pressure cylinder piston when the valve stem closes the medium channel.

[0009] As a preferred technical solution of the utility model, the pressure cover includes a mounting portion extending into the high-pressure air chamber, the high-pressure cylinder piston is at least partially sleeved outside the mounting portion, and a sealed oil chamber located above the high-pressure cylinder piston is formed between the outer wall of the mounting portion and the inner wall of the high-pressure cylinder body, and a high-pressure buffer oil cylinder connected to the sealed oil chamber is provided on one side of the high-pressure cylinder body, and the high-pressure buffer oil cylinder and the sealed oil chamber are filled with hydraulic oil.

[0010] As a preferred technical solution of the utility model, the auxiliary valve is provided with a second exhaust channel in the vertical direction, the first exhaust channel horizontally passes through the auxiliary valve, the high-pressure exhaust port is formed between the first exhaust channel and the second exhaust channel, and the central axes of the first exhaust channel and the second exhaust channel are perpendicular to and intersect with each other.

[0011] As a preferred technical solution of the utility model, a high-pressure air intake pipe is arranged on the auxiliary valve, one end of the high-pressure air intake pipe is connected to the second exhaust channel and the high-pressure air intake pipe is lower than the high-pressure exhaust port, and a high-pressure pneumatic ball valve is arranged at the other end of the high-pressure air intake pipe.

[0012] As a preferred technical solution of the utility model, a low-pressure cylinder piston is slidably installed in the low-pressure cylinder body, and the low-pressure cylinder piston divides the interior of the low-pressure cylinder body into a mutually independent low-pressure air chamber and a second energy storage chamber. At least one second energy storage spring is arranged in the second energy storage chamber, and the two ends of the second energy storage spring are respectively connected to the bottom wall of the second energy storage chamber and the low-pressure cylinder piston. A high-pressure exhaust rod for opening and closing the high-pressure exhaust port is arranged on the low-pressure cylinder piston, and a high-pressure air opening and closing valve disc adapted to the high-pressure exhaust port is arranged at the end of the high-pressure exhaust rod.

[0013] As a preferred technical solution of the utility model, the low-pressure cylinder body is provided with a quick exhaust valve and a solenoid valve connected to the low-pressure air chamber, and the solenoid valve is connected to the air source.

[0014] To sum up, the beneficial effects of the utility model are as follows: a high-low pressure dual cylinder body dual discharge and auxiliary valve structure is adopted, the high-pressure cylinder body intake causes the valve stem to close the medium channel, and the low-pressure cylinder body controls the opening and closing of the high-pressure exhaust port. When the high-pressure exhaust port is opened, the high-pressure gas source is discharged from a separately arranged auxiliary valve. Compared with an ordinary quick exhaust valve, the exhaust channel is larger and the exhaust speed is faster, thereby realizing quick opening of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the valve body actuator part in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the low-pressure cylinder body part of the utility model.

[0018] Figure numerals: 1, valve body; 11, valve stem; 12, medium channel; 121, inlet; 122, outlet; 123, valve port; 13, valve core; 131, cone surface; 2, actuator; 21, first cylinder assembly; 211, high-pressure cylinder body; 2111, high-pressure air inlet; 2112, high-pressure exhaust port; 2113, high-pressure air chamber; 2114, first energy storage chamber; 212, high-pressure cylinder piston; 213, first energy storage spring; 214, gland; 2141, first air outlet channel; 2142, mounting portion; 215, high-pressure damping spring; 216, sealed oil chamber; 217, high-pressure buffer oil cylinder; 22, second cylinder assembly; 221, low-pressure cylinder body; 2211, low-pressure air chamber; 2212, second energy storage chamber; 222, low-pressure cylinder piston; 223, second energy storage spring; 224, high-pressure exhaust rod; 225, high-pressure gas opening and closing valve disc; 226, sealing cover; 227, low-pressure damping spring; 228, quick exhaust valve; 229, solenoid valve; 23, auxiliary valve; 231, first exhaust channel; 232, second exhaust channel; 233, high-pressure intake pipe; 234, high-pressure pneumatic ball valve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0020] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0021] like Figure 1-3 A quick-opening stop valve is shown, comprising a valve body 1 and a valve stem 11. The valve body 1 is provided with a medium channel 12, an inlet 121 and an outlet 122 connected to the medium channel 12, and is also provided with an actuator 2 for driving the valve stem 11 to rise and fall so as to open or close the medium channel 12. The actuator 2 comprises a first cylinder assembly 21 and a second cylinder assembly 22. The first cylinder assembly 21 comprises a high-pressure cylinder 211 for driving the valve stem 11 to rise and fall. An auxiliary valve 23 is connected between the first cylinder assembly 21 and the second cylinder assembly 22. A first exhaust channel 231 is provided in the auxiliary valve 23. A high-pressure air inlet 2111 connected to an air source and a high-pressure exhaust port 2112 connected to the first exhaust channel 231 are provided on the high-pressure cylinder 211. The second cylinder assembly 22 comprises a low-pressure cylinder 221 for opening and closing the high-pressure exhaust port 2112.

[0022] It adopts a high-low pressure double cylinder double discharge and auxiliary valve 23 structure. The high-pressure cylinder 211 intakes air to make the valve stem 11 close the medium channel 12, and the low-pressure cylinder 221 controls the opening and closing of the high-pressure exhaust port 2112. When the high-pressure exhaust port 2112 is opened, the high-pressure gas source is discharged from the separately arranged auxiliary valve 23. Compared with the ordinary quick exhaust valve 228, the exhaust channel is larger and the exhaust speed is faster, thereby realizing quick opening of the valve.

[0023] A high-pressure cylinder piston 212 is slidably installed in the high-pressure cylinder body 211. The high-pressure cylinder piston 212 divides the interior of the high-pressure cylinder body 211 into a mutually independent high-pressure air chamber 2113 and a first energy storage chamber 2114. The high-pressure air chamber 2113 is connected to the high-pressure air inlet 2111 and the high-pressure exhaust port 2112. At least one first energy storage spring 213 is provided in the first energy storage chamber 2114. The two ends of the first energy storage spring 213 are respectively connected to the inner bottom wall of the first energy storage chamber 2114 and the high-pressure cylinder piston 212. The high-pressure cylinder piston 212 is connected to the valve stem 11. When the valve core 13 at the lower end of the valve stem 11 closes the valve port 123, the medium channel 12 is cut off. At this time, the first energy storage spring 213 is compressed and is in an energy storage state.

[0024] The high-pressure cylinder body 211 is provided with a pressure cover 214 located above the high-pressure gas chamber 2113, and a first gas outlet channel 2141 is provided in the pressure cover 214. One end of the first gas outlet channel 2141 is connected to the high-pressure gas chamber 2113, and the other end of the first gas outlet channel 2141 is connected to the high-pressure exhaust port 2112.

[0025] The gland 214 is located in the high-pressure gas chamber 2113 and has at least one high-pressure damping spring 215 installed on one end surface thereof. When the valve stem 11 closes the medium passage 12, the lower end of the high-pressure damping spring 215 is separated from the high-pressure cylinder piston 212. The gland 214 includes a mounting portion 2142 extending into the high-pressure gas chamber 2113. The high-pressure cylinder piston 212 is at least partially sleeved outside the mounting portion 2142. A sealed oil chamber 216 located above the high-pressure cylinder piston 212 is formed between the outer wall of the mounting portion 2142 and the inner wall of the high-pressure cylinder body 211. A high-pressure buffer cylinder 217 connected to the sealed oil chamber 216 is provided on one side of the body 211. The high-pressure buffer cylinder 217 and the sealed oil chamber 216 are filled with hydraulic oil. The high-pressure buffer cylinder 217 is commercially available. This is a prior art, so it is not elaborated in detail; in this embodiment, when the high-pressure gas is discharged, the first energy storage spring 213 releases energy, and the high-pressure cylinder piston 212 moves upward to compress the hydraulic oil and the high-pressure damping spring 215. The two have the same function and play a double buffering role, which can absorb impact and vibration and reduce damage to the valve body 1.

[0026] The auxiliary valve 23 is provided with a second exhaust channel 232 along the vertical direction, and the first exhaust channel 231 horizontally penetrates the auxiliary valve 23. The high-pressure exhaust port 2112 is formed between the first exhaust channel 231 and the second exhaust channel 232. The central axes of the first exhaust channel 231 and the second exhaust channel 232 are perpendicular to each other and intersect.

[0027] A high-pressure air intake pipe 233 is provided on the secondary valve 23 , one end of the high-pressure air intake pipe 233 is connected to the second exhaust channel 232 and the high-pressure air intake pipe 233 is lower than the high-pressure exhaust port 2112 , and a high-pressure pneumatic ball valve 234 is provided on the other end of the high-pressure air intake pipe 233 .

[0028] A low-pressure cylinder piston 222 is slidably installed in the low-pressure cylinder body 221. The low-pressure cylinder piston 222 divides the interior of the low-pressure cylinder body 221 into a low-pressure air chamber 2211 and a second energy storage chamber 2212 that are independent of each other. At least one second energy storage spring 223 is arranged in the second energy storage chamber 2212. The two ends of the second energy storage spring 223 are respectively connected to the bottom wall of the second energy storage chamber 2212 and the low-pressure cylinder piston 222. A high-pressure exhaust rod 224 for opening and closing the high-pressure exhaust port 2112 is arranged on the low-pressure cylinder piston 222. The end of the high-pressure exhaust rod 224 is arranged There is a high-pressure gas opening and closing valve disc 225 adapted to the high-pressure exhaust port 2112. In this embodiment, a sealing cover 226 located above the low-pressure air chamber 2211 is provided on the low-pressure cylinder body 221. The sealing cover 226 is located in the low-pressure air chamber 2211 and has at least one low-pressure damping spring 227 installed on one end face. The high pressure and low pressure in this embodiment are only features to distinguish the high-pressure cylinder body 211 from the low-pressure cylinder body 221, and no specific functional limitation is made. The difference between high pressure and low pressure only exists during ventilation. High pressure and low pressure are relative and do not need to be limited to a specific range.

[0029] The low-pressure cylinder body 221 is provided with a quick exhaust valve 228 and a solenoid valve 229 which are connected to the low-pressure air chamber 2211. The solenoid valve 229 is connected to the low-pressure air source, and the quick exhaust valve 228 is used to exhaust the low-pressure air source in the low-pressure air chamber 2211. As for how the solenoid valve 229 and the quick exhaust valve 228 are installed with the low-pressure cylinder body 221, this is the prior art and is not an improvement point of the present application, so it is not elaborated in detail.

[0030] The angle between the center axis of the valve stem 11 and the center axis of the medium channel 12 is 30°-45°. A valve port 123 connected to the medium channel 12 is arranged in the valve body 1. A valve core 13 corresponding to the valve port 123 is arranged at the lower end of the valve stem 11. The outer wall of the valve core 13 is at least partially arranged as a conical surface 131 and the conical surface 131 forms a sealing fit with the valve port 123. This structure is the structure with the smallest flow resistance of the stop valve type, and can realize forced sealing of the conical surface 131.

[0031] Working principle: The high-pressure cylinder body 211 is controlled by the high-pressure pneumatic ball valve 234 to fill the high-pressure nitrogen of 12MPa into the high-pressure air chamber 2113. The high-pressure cylinder piston 212 moves downward and compresses the first energy storage spring 213 until the valve core 13 at the lower end of the valve stem 11 closes the valve port 123 to cut off the medium channel 12. The low-pressure cylinder body 221 is responsible for completing the fast opening time control of the valve. Since the working pressure of the solenoid valve 229 is less than 1MPa, the working pressure of the low-pressure cylinder body 221 is selected to be 0.8Mpa. The auxiliary valve 23 is connected The middle structure is connected to the high- and low-pressure dual cylinder bodies, and the movement of the high-pressure gas opening and closing valve disc 225 inside is controlled by the low-pressure cylinder body 221. The low-pressure cylinder body 221 is exhausted through the quick exhaust valve 228, and the second energy storage spring 223 releases energy. The high-pressure gas opening and closing valve disc 225 is quickly separated from the high-pressure exhaust port 2112, and the high-pressure gas can be discharged from both ends of the first exhaust channel 231 of the auxiliary valve 23. The exhaust speed is fast and the exhaust flow area is larger, so the valve can be opened quickly. According to actual tests, ultra-fast opening (0.02s) can be achieved.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A quick-opening stop valve, comprising a valve body (1) and a valve stem (11), wherein the valve body (1) is provided with a medium channel (12), an inlet (121) and an outlet (122) connected to the medium channel (12), and an actuator (2) for driving the valve stem (11) to move up and down to open or close the medium channel (12), characterized in that: The actuator (2) comprises a first cylinder assembly (21) and a second cylinder assembly (22); the first cylinder assembly (21) comprises a high-pressure cylinder (211) for driving the valve stem (11) to rise and fall; a secondary valve (23) is connected between the first cylinder assembly (21) and the second cylinder assembly (22); a first exhaust passage (231) is provided in the secondary valve (23); a high-pressure air inlet (2111) connected to an air source and a high-pressure exhaust port (2112) connected to the first exhaust passage (231) are provided on the high-pressure cylinder (211). ), the second cylinder assembly (22) comprises a low-pressure cylinder body (221) for opening and closing a high-pressure exhaust port (2112); the angle between the central axis of the valve stem (11) and the central axis of the medium channel (12) is 30°-45°, a valve port (123) connected to the medium channel (12) is arranged in the valve body (1), a valve core (13) corresponding to the valve port (123) is arranged at the lower end of the valve stem (11), and the outer wall of the valve core (13) is at least partially arranged as a conical surface (131) and the conical surface (131) forms a sealing fit with the valve port (123).

2. The quick-opening stop valve according to claim 1, characterized in that: A high-pressure cylinder piston (212) is slidably mounted in the high-pressure cylinder body (211). The high-pressure cylinder piston (212) divides the interior of the high-pressure cylinder body (211) into mutually independent high-pressure gas chambers (2113) and a first energy storage chamber (2114). The high-pressure gas chamber (2113) is connected to a high-pressure air inlet (2111) and a high-pressure exhaust port (2112). At least one first energy storage spring (213) is provided in the first energy storage chamber (2114). Two ends of the first energy storage spring (213) are respectively connected to the inner bottom wall of the first energy storage chamber (2114) and the high-pressure cylinder piston (212). The high-pressure cylinder piston (212) is connected to the valve stem (11).

3. The quick-opening stop valve according to claim 2, characterized in that: The high-pressure cylinder body (211) is provided with a pressure cover (214) located above the high-pressure gas chamber (2113), and a first gas outlet channel (2141) is provided in the pressure cover (214), one end of the first gas outlet channel (2141) is connected to the high-pressure gas chamber (2113), and the other end of the first gas outlet channel (2141) is connected to the high-pressure exhaust port (2112).

4. The quick-opening stop valve according to claim 3, characterized in that: At least one high-pressure damping spring (215) is installed on one end surface of the gland (214) located in the high-pressure gas chamber (2113); when the valve stem (11) closes the medium channel (12), the lower end of the high-pressure damping spring (215) is separated from the high-pressure cylinder piston (212).

5. The quick-opening stop valve according to claim 3, characterized in that: The pressure cover (214) includes a mounting portion (2142) extending into the high-pressure gas chamber (2113); the high-pressure cylinder piston (212) is at least partially sleeved outside the mounting portion (2142); a sealed oil chamber (216) located above the high-pressure cylinder piston (212) is formed between the outer wall of the mounting portion (2142) and the inner wall of the high-pressure cylinder body (211); a high-pressure buffer oil cylinder (217) connected to the sealed oil chamber (216) is provided on one side of the high-pressure cylinder body (211); and the high-pressure buffer oil cylinder (217) and the sealed oil chamber (216) are filled with hydraulic oil.

6. The quick-opening stop valve according to claim 1, 2 or 3, characterized in that: The auxiliary valve (23) is provided with a second exhaust channel (232) along the vertical direction, the first exhaust channel (231) runs through the auxiliary valve (23) horizontally, the high-pressure exhaust port (2112) is formed between the first exhaust channel (231) and the second exhaust channel (232), and the central axes of the first exhaust channel (231) and the second exhaust channel (232) are perpendicular to each other and intersect.

7. The quick-opening stop valve according to claim 6, characterized in that: The auxiliary valve (23) is provided with a high-pressure air intake pipe (233), one end of the high-pressure air intake pipe (233) is connected to the second exhaust channel (232) and the high-pressure air intake pipe (233) is lower than the high-pressure exhaust port (2112), and the other end of the high-pressure air intake pipe (233) is provided with a high-pressure pneumatic ball valve (234).

8. The quick-opening stop valve according to claim 1 or 7, characterized in that: A low-pressure cylinder piston (222) is slidably mounted in the low-pressure cylinder body (221), and the low-pressure cylinder piston (222) divides the interior of the low-pressure cylinder body (221) into a low-pressure air chamber (2211) and a second energy storage chamber (2212) that are independent of each other. At least one second energy storage spring (223) is arranged in the second energy storage chamber (2212), and the two ends of the second energy storage spring (223) are respectively connected to the inner bottom wall of the second energy storage chamber (2212) and the low-pressure cylinder piston (222). A high-pressure exhaust rod (224) for opening and closing the high-pressure exhaust port (2112) is arranged on the low-pressure cylinder piston (222), and a high-pressure air opening and closing valve disc (225) adapted to the high-pressure exhaust port (2112) is arranged at the end of the high-pressure exhaust rod (224).

9. The quick-opening stop valve according to claim 8, characterized in that: The low-pressure cylinder body (221) is provided with a quick exhaust valve (228) and a solenoid valve (229) which are in communication with the low-pressure air chamber (2211), and the solenoid valve (229) is connected to a gas source.

Images