Intelligent valve positioner

Abstract

According to the technical scheme, the intelligent valve positioner is characterized in that the intelligent valve positioner comprises a housing, an adjusting mechanism is arranged in the housing and comprises an air channel assembly, a pneumatic assembly is arranged above the air channel assembly, an air inlet hole and an air outlet hole are formed in the lower portion of the air channel assembly, and the pneumatic assembly comprises an air valve base and a rear cover; the air valve base and the rear cover are connected through screws and are integrated and fixed with the air path, a transmission assembly is arranged between the air valve base and the rear cover, an upper extrusion cavity is formed between the transmission assembly and the rear cover, the upper extrusion cavity is connected with an air pressure adjusting assembly, and an air cap is arranged on the lower side of the transmission assembly; the air inlet is communicated with the lower side of the air cap, an exhaust hole communicated with the exhaust cavity is formed in the air channel assembly, the lower end of the exhaust hole is communicated with the air outlet, the lower side of the air cap is detachably connected with an adjusting rod, and the lower end of the adjusting rod penetrates through the air channel assembly and is connected with a control assembly. The invention has the functions of flexible operation mode and stable performance.

Description

Technical Field

[0001] The present invention relates to the technical field of positioners, and particularly to an intelligent valve positioner. Background Art

[0002] A valve positioner usually constitutes a valve electric opening and closing mechanism together with a pneumatic actuator. The function of the valve positioner is to control the gas flow rate input to the pneumatic actuator, thereby controlling the opening size of the valve.

[0003] As Figure 1 shown is a valve positioner adjusting mechanism, which includes an air circuit integration 21. An air actuator assembly 22 is provided above the air circuit integration 21. The air actuator assembly 22 includes an air valve base 221 and a rear cover 222. A transmission assembly 223 is provided between the air valve base 221 and the rear cover 222. An upper extrusion cavity 2221 is formed between the transmission assembly 223 and the rear cover 222. An air top 224 is provided below the transmission assembly 223. The air top 224 is in abutting contact with the air valve base 221 through an auxiliary spring 225. An exhaust cavity 2211 is provided in the air valve base 221. An air inlet hole 211 and an air outlet hole 212 are provided below the air circuit integration 21. The air inlet hole 211 is communicated with the lower side of the air top 224, and the air outlet hole 212 is communicated with the exhaust cavity 2211.

[0004] When the valve needs to be controlled, the pressure in the upper extrusion cavity 2221 can be increased, so that the exhaust cavity 2211 is communicated with the air inlet hole 211, thereby making the air inlet hole 211 communicated with the air outlet hole 212. The gas can be output to the electric actuator through the air outlet hole 212 to realize the control of the valve. However, after a failure occurs and the pressure in the upper extrusion cavity 2221 cannot be adjusted, the valve positioner will lose its function, making the valve unable to open and close, and the stability of the valve positioner is poor, which is not conducive to people's use. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an intelligent valve positioner, which has the functions of flexible operation mode and stable performance.

[0006] To achieve the above object, the present invention provides the following technical solution: An intelligent valve positioner, comprising a housing, an adjusting mechanism is provided inside the housing, the adjusting mechanism includes a gas path integration, a pneumatic component is provided above the gas path integration, an air inlet hole and an air outlet hole are provided below the gas path integration, the pneumatic component includes a valve base and a rear cover, the valve base and the rear cover are connected by screws and fixed to the gas path integration, a transmission component is provided between the valve base and the rear cover, an upper extrusion cavity is formed between the transmission component and the rear cover, the upper extrusion cavity is connected to a pneumatic pressure regulating component, a gas top is provided on the lower side of the transmission component, the upper end of the gas top abuts against the inner wall of the valve base through an auxiliary spring, the air inlet hole communicates with the lower side of the gas top, an exhaust hole communicating with an exhaust cavity is provided inside the gas path integration, the lower end of the exhaust hole communicates with the air outlet hole, the lower side of the gas top is detachably connected with an adjusting rod, and the lower end of the adjusting rod passes through the gas path integration and is connected with a control component.

[0007] By adopting the above technical solution, when it is necessary to control the valve, the pressure of the upper extrusion cavity can be increased through the pressure regulating component, thereby driving the gas top to move downward, so that the gas in the air inlet hole can enter the exhaust cavity through the gap between the lower end of the gas top and the valve base, and then the gas is discharged from the air outlet hole through the exhaust hole, and the discharged gas is input into the electric actuator to realize the control of the valve. By controlling the pressure in the upper extrusion cavity, the size of the gap between the lower end of the gas top and the valve base can be adjusted, so as to control the gas flow rate and realize the precise control of the opening and closing degree of the invention. When the pressure regulating device fails, the gas top can be directly moved by means of external force through the control component, which is convenient for opening and closing the valve in an emergency and improves the stability of the valve positioner.

[0008] The present invention is further configured as follows: The control component includes a control cover located outside the lower end of the adjusting rod, the control cover is made of rubber material and fixed to the gas path integration, a deformation groove extending upward is provided at the lower end of the control adjusting rod, two connecting plates are provided in the deformation groove, a plurality of positioning springs are connected to the opposite sides of the two connecting plates, upper transmission shafts and lower transmission shafts are fixed to the upper and lower ends of the opposite sides of the two connecting plates respectively, the upper transmission shafts and the lower transmission shafts are both arranged in the adjusting rod, an installation groove for inserting the adjusting rod is provided in the gas top, and clamping grooves for inserting the upper transmission shafts are provided on the left and right sides of the installation groove. When the positioning springs are in a normal state, the upper transmission shafts are inserted.

[0009] By adopting the above technical solution, when the pressure regulating component fails, the control cover can be pressed to control the lower transmission shaft, so as to move the adjusting rod up and down through the lower transmission shaft, and the adjusting rod can drive the gas top to move through the upper transmission shaft, thereby realizing the control of the opening and closing of the valve and improving the stability of the valve positioner. And when it is necessary to replace the gas top, the lower transmission shaft can be pressed to make the two connecting plates move towards each other, so that the upper transmission shaft can be separated from the clamping groove, and the adjusting rod can be separated from the gas top conveniently, which is convenient for disassembly, installation and later maintenance.

[0010] The present invention is further configured such that the upper transfer shaft and the lower transfer shaft are threadedly connected to the connection plate.

[0011] By adopting the above technical solution, the upper transfer shaft and the lower transfer shaft are convenient to disassemble and assemble with the connection plate and are easy to install.

[0012] The present invention is further configured such that a control ring is fixed to the upper end of the control cover, a control groove threadedly connected to the control ring is provided below the air circuit integration, and a sealing ring is provided at the bottom of the control groove.

[0013] By adopting the above technical solution, the control cover is connected to the air circuit integration through the control ring, making the control cover convenient to disassemble and easy for later maintenance and replacement. And through the sealing of the sealing ring, the gas in the control hole is not easily discharged downward, improving the overall airtightness, thereby facilitating the effective control of the opening and closing of the valve.

[0014] The present invention is further configured such that a motor is provided above the air circuit integration, the upper end of the air inlet hole is connected with a transmission hole and a support hole, the support hole is communicated with the lower side of the air top, the pressure regulating assembly includes a throttle valve communicated with the lower end of the transmission hole, a gas delivery hole is connected to the rear end of the throttle valve, an extrusion hole and an adjustment hole are provided at the upper end of the gas delivery hole, the extrusion hole is communicated with the upper extrusion cavity through a gas guiding channel in the valve base and the rear cover, the upper end of the adjustment hole is communicated with the motor, and a transfer interface is provided on the air valve base and is communicated with the exhaust hole and the exhaust cavity.

[0015] By adopting the above technical solution, a part of the gas entering the air inlet hole enters below the support hole, and the other part enters the gas delivery hole after passing through the throttle valve, and then is split into the upper extrusion cavity and the adjustment hole. A magnetic sheet and a gas nozzle that can move up and down through current control are provided in the motor. By controlling the distance between the magnetic sheet and the gas nozzle through current, the degree of air release in the adjustment hole is controlled, so as to adjust the pressure in the upper extrusion cavity, thereby facilitating the control of the up and down movement of the air top and realizing the control of the opening and closing degree of the valve.

[0016] The present invention is further configured such that an air inlet pressure gauge and an air outlet pressure gauge are provided on the front side of the housing, the lower end of the transmission hole is communicated with an air inlet detection hole, the air inlet pressure protection is communicated with the air inlet detection hole, an air outlet detection hole is provided on the side wall of the air outlet hole, and the air outlet detection hole is communicated with the air outlet pressure gauge.

[0017] By adopting the above technical solution, the air inlet and air outlet are detected through the air inlet pressure gauge and the air outlet pressure gauge, which is convenient for timely understanding the air pressure state and making adjustments.

[0018] In summary, the present invention has the following beneficial effects: The pressure in the upper extrusion chamber can be finely adjusted by the motor, so as to precisely control the gap between the lower end of the air top and the air valve base, achieve precise control of the air pressure discharged from the exhaust hole, and enable the output gas to precisely control the opening and closing state of the valve after passing through the electric actuator. When the motor fails, the adjusting rod can be controlled through the control cover, and then the air top can be moved through the adjusting rod, facilitating manual or other means to control the opening and closing of the valve, thereby improving the stability of the valve positioner. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an adjusting mechanism of a valve positioner in the background technology; Figure 2 It is a schematic structural diagram of this embodiment; Figure 3 It is an exploded schematic diagram of this embodiment; Figure 4 It is a schematic cross-sectional view of the adjusting mechanism in this embodiment; Figure 5 It is Figure 4 An enlarged schematic diagram at A; Figure 6 It is Figure 4 A partial sectional schematic diagram at B - B; Figure 7 It is a schematic structural diagram of the air circuit integration in this embodiment; Figure 8 It is a schematic cross-sectional view highlighting the relationship between the air inlet hole and the transmission hole in the air circuit integration of this embodiment; Figure 9 It is a schematic cross-sectional view highlighting the relationship between the air outlet hole and the exhaust hole in the air circuit integration of this embodiment.

[0020] Reference Numerals: 1, housing; 2, adjusting mechanism; 3, inlet pressure gauge; 4, outlet pressure gauge; 21, air circuit integration; 22, pneumatic component; 23, motor; 24, throttle valve; 25, auxiliary component; 211, air inlet hole; 212, air outlet hole; 213, transmission hole; 214, support hole; 215, exhaust hole; 216, connection hole; 217, air supply hole; 218, extrusion hole; 219, adjustment hole; 2131, air inlet detection hole; 2161, air outlet detection hole; 221, air valve base; 222, rear cover; 223, transmission component; 224, air top; 225, auxiliary spring; 226, air guide channel; 2211, exhaust chamber; 2212, adapter; 2221, upper extrusion chamber; 2241, card slot; 231, magnetic sheet; 232, air nozzle; 251, adjusting rod; 252, control cover; 253, control ring; 254, control groove; 255, sealing ring; 256, connecting plate; 257, positioning spring; 258, upper transmission shaft; 259, lower transmission shaft; 2511, deformation groove Detailed Embodiments

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This embodiment discloses an intelligent valve positioner, which includes a housing 1. An adjusting mechanism 2 is provided inside the housing 1. The adjusting mechanism 2 includes a gas path integration 21. Above the gas path integration 21, a pneumatic component 22 and a motor 23 are provided. Below the gas path integration 21, an air inlet hole 211 and an air outlet hole 212 are provided. An air inlet pressure gauge 3 and an air outlet pressure gauge 4 are provided on the front side of the housing 1.

[0023] The pneumatic component 22 includes a valve base 221 and a rear cover 222. The valve base 221 and the rear cover 222 are connected by screws and fixed to the gas path integration 21. A transmission component 223 is provided between the valve base 221 and the rear cover 222. An upper extrusion cavity 2221 is formed between the transmission component 223 and the rear cover 222. A gas top 224 is provided below the transmission component 223. The upper end of the gas top 224 abuts against the inner wall of the valve base 221 through an auxiliary spring 225. An exhaust cavity 2211 is provided inside the valve base 221.

[0024] The upper end of the air inlet hole 211 is connected with a transmission hole 213 and a support hole 214. The support hole 214 is communicated with the lower side of the gas top 224. When the auxiliary spring 225 is in a normal state, the gas top 224 closes the lower end of the exhaust cavity 2211, so that the exhaust cavity 2211 is not communicated with the support hole 214. A transfer interface 2212 is provided on the valve base 221. An exhaust hole 215 is provided inside the gas path integration 21. The transfer interface 2212 is communicated with the exhaust hole 215 and the exhaust cavity 2211. The lower end of the exhaust hole 215 is communicated with the air outlet hole 212 through a connection hole 216. An air outlet detection hole 2161 is provided on the side wall of the air outlet hole 212. The air outlet detection hole 2161 is communicated with the air outlet pressure gauge 4.

[0025] The lower end of the transmission hole 213 is communicated with an air inlet detection hole 2131 and a throttle valve 24. The air inlet pressure gauge 3 is communicated with the air inlet detection hole 2131. The rear end of the throttle valve 24 is connected with an air supply hole 217. An extrusion hole 218 and an adjustment hole 219 are provided at the upper end of the air supply hole 217. The extrusion hole 218 is communicated with the upper extrusion cavity 2221 through a gas guiding channel 226 inside the valve base and the rear cover 222. The upper end of the adjustment hole 219 is communicated with the motor 23. A magnetic sheet 231 and a gas nozzle 232 that can be driven by current are provided inside the motor 23. By controlling the distance between the magnetic sheet 231 and the gas nozzle 232, the air pressure inside the adjustment hole 219 is adjusted, so as to realize the adjustment of the pressure inside the upper extrusion cavity 2221.

[0026] When the valve needs to be adjusted, the pressure in the upper extrusion chamber 2221 can be changed by the motor 23, so that the air top 224 moves downward, enabling the gas in the air inlet hole 211 to enter the transfer hole through the exhaust chamber 2211 and then enter the exhaust hole 215, and then be output to the starting actuator through the air outlet hole 212, thereby realizing the control of the valve.

[0027] An auxiliary component 25 is connected to the lower side of the air top 224. An auxiliary hole is provided at the lower end of the support hole 214. The auxiliary component 25 includes an adjustment rod 251 inserted into the auxiliary hole. The lower end of the adjustment rod 251 passes out of the air path integration 21 and a control cover 252 is arranged outside it. A control ring 253 is fixed to the upper end of the control cover 252. A control groove 254 threadedly connected to the control ring 253 is provided below the air path integration 21. A sealing ring 255 is provided at the bottom of the control groove 254. The control cover 252 is made of rubber material. An upwardly extending deformation groove 2511 is provided at the lower end of the adjustment rod 251. Two connecting plates 256 are arranged in the deformation groove 2511. A plurality of positioning springs 257 are connected to the opposite sides of the two connecting plates 256. The upper and lower ends of the opposite sides of the two connecting plates 256 are respectively threadedly connected with an upper transmission shaft 258 and a lower transmission shaft 259. The upper transmission shaft 258 and the lower transmission shaft 259 are both inserted into the adjustment rod 251. An installation groove for inserting the adjustment rod 251 is provided in the air top 224. Card slots 2241 for inserting the upper transmission shaft 258 are provided on the left and right sides of the installation groove. When the positioning spring 257 is in a normal state, the upper transmission shaft 258 is inserted into the card slot 2241, so that the air top 224 is connected to the adjustment rod 251. When the motor 23 is powered off or damaged and unable to move the air top 224, the adjustment rod 251 can be moved by the control cover 252. The adjustment rod 251 can be manually controlled or moved by other devices, so that the gas can be output to the electric actuator through the exhaust hole 215, improving the reliability of the valve positioner.

[0028] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent valve positioner, characterized in that: The invention comprises a housing (1), wherein an adjusting mechanism (2) is arranged in the housing (1), wherein the adjusting mechanism (2) comprises an air circuit assembly (21), wherein a pneumatic assembly (22) is arranged above the air circuit assembly (21), wherein an air inlet (211) and an air outlet (212) are arranged below the air circuit assembly (21), wherein the pneumatic assembly (22) comprises an air valve base (221) and a rear cover (222), wherein the air valve base (221) and the rear cover (222) are connected by screws and fixed to the air circuit assembly (21), wherein a transmission assembly (223) is arranged between the air valve base (221) and the rear cover (222), and an upper extrusion cavity (213) is formed between the transmission assembly (223) and the rear cover (222). 2221), the upper extrusion chamber (2221) is connected to the air pressure regulating assembly, a gas cap (224) is provided on the lower side of the transmission assembly (223), the upper end of the gas cap (224) is in contact with the inner wall of the air valve base (221) through an auxiliary spring (225), the air inlet (211) is communicated with the lower side of the gas cap (224), an exhaust hole (215) connected to the exhaust chamber (2211) is provided in the air path assembly (21), the lower end of the exhaust hole (215) is communicated with the air outlet hole (212), the lower side of the gas cap (224) is detachably connected to an adjusting rod (251), the lower end of the adjusting rod (251) passes through the air path assembly (21) and is connected to the control assembly.

2. The intelligent valve positioner according to claim 1, characterized in that: The control assembly comprises a control cover (252) located outside the lower end of the adjustment rod (251), the control cover (252) is made of rubber material and is fixed to the gas circuit assembly (21), the lower end of the control adjustment rod (251) is provided with a deformation groove (2511) extending upward, and two connecting plates (256) are provided in the deformation groove (2511), and a plurality of positioning springs (257) are connected to the opposite sides of the two connecting plates (256). 6) An upper transmission shaft (258) and a lower transmission shaft (259) are fixed at the upper and lower ends of the opposite side. The upper transmission shaft (258) and the lower transmission shaft (259) are both inserted into the adjustment rod (251). A mounting groove for inserting the adjustment rod (251) is provided in the gas cap (224). The left and right sides of the mounting groove are provided with a clamping groove (2241) for inserting the upper transmission shaft (258). When the positioning spring (257) is in a normal state, the upper transmission shaft (258) is inserted.

3. The intelligent valve positioner according to claim 2, characterized in that: The upper transmission shaft (258) and the lower transmission shaft (259) are threadedly connected to the connecting plate (256).

4. The intelligent valve positioner according to claim 2, characterized in that: A control ring (253) is fixed at the upper end of the control cover (252), a control groove (254) threadedly connected to the control ring (253) is provided at the lower side of the gas path integration (21), and a sealing ring (255) is provided at the bottom of the control groove (254).

5. The intelligent valve positioner according to claim 2, characterized in that: A motor (23) is provided above the gas path assembly (21); the upper end of the air inlet hole (211) is connected to a transmission hole (213) and a support hole (214); the support hole (214) is in communication with the lower side of the gas cap (224); the pressure regulating assembly comprises a throttle valve (24) in communication with the lower end of the transmission hole (213); the rear end of the throttle valve (24) is connected to an air supply hole (217); an extrusion hole (218) and an adjustment hole (219) are provided at the upper end of the air supply hole (217); the extrusion hole (218) is in communication with an upper extrusion chamber (2221) through an air guide channel (226) in a valve base and a rear cover (222); the upper end of the adjustment hole (219) is in communication with the motor (23); a transfer interface (2212) is provided on the air valve base (221); the transfer interface (2212) is in communication with the exhaust hole (215) and the exhaust chamber (2211).

6. The intelligent valve positioner according to claim 5, characterized in that: An air intake pressure gauge (3) and an air outlet pressure gauge (4) are provided on the front side of the housing (1); an air intake detection hole (2131) is connected to the lower end of the transmission hole (213); the air intake pressure gauge is connected to the air intake detection hole (2131); an air outlet detection hole (2161) is provided on the side wall of the air outlet hole (212); and the air outlet detection hole (2161) is connected to the air outlet pressure gauge (4).

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