CN-122014861-A - Electrodeless fine adjustment type regulating valve

Abstract

The invention discloses an electrodeless fine-tuning type regulating valve which comprises a valve body, a valve cover, a valve rod and a driving device, wherein an inlet cavity, an outlet cavity, a central flow passage, a middle cavity and a valve seat are arranged in the valve body, the valve cover is covered at the upper end of the valve body, the valve rod penetrates through the valve cover and is in transmission connection with the driving device, a valve clack at the lower end is in sealing fit with the valve seat, the electrodeless fine-tuning type regulating valve is characterized in that a spiral guide rod mechanism capable of regulating the screw pitch is arranged in the valve cover, a regulating seat ring in the valve cavity is limited to rotate through an anti-rotation structure, the upper end and the lower end of the spiral guide rod are respectively limited to the regulating seat ring and the valve cover, a regulating sleeve at the upper end of the valve cover can push the regulating seat ring to lift through threaded connection so as to change the screw pitch of the spiral guide rod, and a guide ring on the valve rod is matched with the spiral guide rod to move spirally along the spiral guide rod along with the rotation of the valve rod so as to drive the valve rod to lift. The invention realizes stepless fine adjustment of the valve rod lifting amount, and has the advantages of high adjustment precision, wide adaptation scene, low operation and maintenance cost, stable operation and the like.

Inventors

• LU LIANGSHENG
• Zheng Dongai
• ZHOU XIAOLI
• WANG LILI
• Long Tingxiong
• ZHAO XIAOTING
• LI DA

Assignees

• 浙江成瑞阀门制造有限公司

Dates

Publication Date

20260512

Application Date

20260413

Claims (9)

1. 1. The stepless fine tuning type regulating valve comprises a valve body, a valve cover, a valve rod and a driving device, wherein an inlet cavity, an outlet cavity, a central flow channel, a middle cavity and a valve seat are arranged in the valve body, the valve cover is matched with the cover, the valve rod is arranged on the valve cover in a penetrating mode, the upper end of the valve rod is connected with the driving device in a transmission mode, the lower end of the valve rod stretches into the middle cavity of the valve body, a valve clack is arranged at the lower end of the corresponding valve rod, the valve clack is in sealing fit with the valve seat.
2. 2. The stepless fine tuning regulating valve of claim 1, wherein the guide hole has a small inner diameter and large two ends, and is in cambered surface transition.
3. 3. The stepless fine tuning regulating valve of claim 1, wherein the lower end of the valve rod is provided with a fixed sleeve, the valve clack is connected with the fixed sleeve in a clamping way, a first rotation-preventing transverse pin is arranged on one side of the valve clack, a first rotation-preventing vertical groove is arranged on the inner wall of the corresponding valve body, and the first rotation-preventing transverse pin is matched with the first rotation-preventing vertical groove.
4. 4. The stepless fine tuning regulating valve of claim 1, wherein the lower end of the valve cover is embedded with a limit sleeve, the corresponding valve rod passes through the limit sleeve, and the lower end of the corresponding valve rod is provided with a step which is in limit fit with the limit sleeve.
5. 5. The stepless fine tuning regulating valve of claim 1, wherein a sealing ring is arranged between the valve rod and the lower end of the valve cover.
6. 6. The stepless fine tuning regulating valve of claim 1, wherein the rotation preventing structure comprises a second rotation preventing transverse pin and a second rotation preventing vertical groove which are matched, the second rotation preventing transverse pin is arranged on one side of the regulating seat ring, and the second rotation preventing vertical groove is arranged on the inner wall of the valve cover.
7. 7. The stepless fine tuning regulating valve of claim 1, wherein the lower end of the spiral guide rod is detachably connected with a first rotation preventing vertical rod, and a corresponding valve cover is provided with a first rotation preventing hole.
8. 8. The stepless fine tuning regulating valve of claim 1, wherein the upper end of the spiral guide rod is detachably connected with a second rotation preventing vertical rod, and a second rotation preventing hole is formed in the corresponding regulating seat ring.
9. 9. The stepless fine tuning regulating valve of claim 1, wherein after the spiral guide rod passes through the guide ring, the upper end and the lower end of the spiral guide rod are respectively welded with a second rotation preventing vertical rod and a first rotation preventing vertical rod, a second rotation preventing hole is arranged on the corresponding regulating seat ring, and a first rotation preventing hole is arranged on the valve cover.

Description

Electrodeless fine adjustment type regulating valve Technical Field The invention relates to an improved invention in the field of valves, in particular to an improved invention of an electrodeless fine tuning type regulating valve. Background In various fields such as industrial production, fluid delivery, heating ventilation air conditioning, etc., the governing valve is as accurate control fluid flow, pressure, the core device of temperature, and its regulation precision directly concerns production process stability, energy utilization efficiency and system operation security. The traditional regulating valve generally utilizes a driving device, and comprises a hand wheel, a turbine, a pneumatic actuator, a hydraulic actuator, an electric actuator or a gas-liquid actuator and the like, wherein the driving device drives a valve rod nut to rotate so as to drive a valve rod and a valve clack to move up and down, the corresponding valve rod is in transmission fit with the valve rod nut through trapezoidal threads, the pitch of the trapezoidal threads has a plurality of fixed standard values, after one fixed pitch is selected, the fixed pitch cannot be regulated again, namely, when the fluid parameter is required to be finely regulated, the lifting and falling amount of the valve rod is fixed every time the valve rod rotates under the fixed pitch, small-amplitude accurate regulation cannot be realized, the precision of the regulating valve is very low, and after the parameter of the actuator is set, the change is troublesome. As the regulating valve, an accurate value is required for flow, stability and pressure during regulation, so that the conventional regulating valve cannot be accurately regulated, and has poor applicability. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide an electrodeless fine tuning type regulating valve. The stepless fine-tuning regulating valve is characterized in that a cover cavity is arranged in the valve cover, a spiral guide rod and a regulating seat ring are arranged in the cover cavity, the regulating seat ring can be sleeved on the valve rod in a vertically sliding mode, an anti-rotation structure is arranged between the regulating seat ring and the valve cover, the spiral guide rod is arranged around the valve rod, the upper end of the spiral guide rod is limited on the regulating seat ring, the upper end of the valve cover is provided with a regulating sleeve in a penetrating threaded connection with the valve cover in a penetrating mode, the upper end of the regulating sleeve is arranged outside the valve cover in a penetrating mode, the lower end of the regulating sleeve is in abutting connection with the end of the regulating seat ring, the valve rod can movably penetrate through the regulating sleeve, the guide rod is provided with a guide ring, and the guide ring can move along the guide ring in a guiding hole in the guide ring. The inner diameter of the guide hole is small in the middle and large at two ends, and is in cambered surface transition. The valve rod lower extreme is equipped with fixed cover, the valve clack links to each other with fixed cover joint, be equipped with first rotation preventing transverse pin on valve clack one side, be equipped with first rotation preventing vertical groove on the valve body inner wall that corresponds, first rotation preventing transverse pin cooperatees with first rotation preventing vertical groove. The valve cover lower extreme inlays and is equipped with the stop collar, and corresponding valve rod passes the stop collar, and corresponding valve rod lower extreme is equipped with the step, this step and stop collar spacing cooperation. And a sealing ring is arranged between the valve rod and the lower end of the valve cover. The anti-rotation structure comprises a second anti-rotation transverse pin and a second anti-rotation vertical groove which are matched, the second anti-rotation transverse pin is arranged on one side of the adjusting seat ring, and the second anti-rotation vertical groove is arranged on the inner wall of the valve cover. The lower end of the spiral guide rod is detachably connected with a first rotation preventing vertical rod, and a corresponding valve cover is provided with a first rotation preventing hole. The upper end of the spiral guide rod is detachably connected with a second rotation preventing vertical rod, and a second rotation preventing hole is formed in the corresponding adjusting seat ring. After the spiral guide rod passes through the guide ring, the upper end and the lower end of the spiral guide rod are respectively welded with a second rotation preventing vertical rod and a first rotation preventing vertical rod, a second rotation preventing hole is formed in the corresponding adjusting seat ring, and a first rotation preventing hole is formed in the valve cover. The stepless fine-tuning regulating valve has the advantages that