CN110701367A - Economical and practical hydraulic driving mechanism for plug valve - Google Patents
Economical and practical hydraulic driving mechanism for plug valve Download PDFInfo
- Publication number
- CN110701367A CN110701367A CN201911078627.8A CN201911078627A CN110701367A CN 110701367 A CN110701367 A CN 110701367A CN 201911078627 A CN201911078627 A CN 201911078627A CN 110701367 A CN110701367 A CN 110701367A
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- cylinder
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- piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
- F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
- F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/068—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the helical type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/502—Mechanical actuating means with screw-spindle or internally threaded actuating means actuating pivotable valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The utility model provides an economical and practical's plug valve hydraulic drive mechanism comprises cylinder valve gap, hydraulic cylinder, piston, cylinder cap, pilot bar, clamp plate, oil pipe joint, valve rod, thrust bearing, lid flange and supporting sealing member, connector: the valve rod, two thrust bearings and a cover flange are arranged at the center and the lower end of the cylinder valve cover; rectangular spline holes are respectively sleeved on rectangular spline columns at two ends of a piston in the hydraulic cylinder barrel, at the insertion ends of a cylinder valve cover and a cylinder cover; the lower end of the piston is sleeved with a spiral spline column at the upper end of the valve rod by a spiral spline hole; the lower end of the indicating rod is fixed at the upper end of the piston by a pressure plate and a sunk screw; two ends of the hydraulic cylinder barrel are connected with the cylinder valve cover and the cylinder cover into a whole by a cylindrical head screw; the upper end of the indicating rod and the lower end of the valve rod respectively extend out of the upper end surface of the cylinder cover and the lower end surface of the cylinder valve cover and the cover flange. The automatic remote control device has compact structure, accuracy, reliability and low price, and is particularly suitable for the remote automatic control of the high-pressure and large-drift-diameter plug valve.
Description
Technical Field
The invention relates to hydraulic drive of a high-pressure and large-diameter plug valve in petroleum machinery and valve industry.
Background
The high-pressure and large-diameter plug valve has large switch resistance, and when the plug valve is operated by manpower, the used crow bar is long, the action amplitude is large, and the operation is laborious; therefore, the hydraulic drive is carried out on the plug valve, so that the labor intensity of an operator can be reduced, the automation of equipment control can be realized, and the plug valve is suitable for the great trend of social development; in addition, the safety device can prevent personal safety accidents in toxic or pressure medium dangerous occasions. However, the existing high-pressure and large-drift-diameter plug valve is limited by factors such as cost price and the like, and is rarely driven by hydraulic pressure; secondly, the traditional driving mechanism for driving the rack and the gear or the rocker by the hydraulic cylinder has the problems of large volume, loose structure, poor bearing capacity, easy damage and the like; the spiral hydraulic swing oil cylinder which is produced and sold in the market at home and abroad can be used for driving the plug valve with high pressure and large drift diameter, but the structure is complex, the processing is difficult, the price is not good, and the price of the driving mechanism is even higher than that of the plug valve main body, so that the driving mechanism is unacceptable. Therefore, it is necessary to develop a hydraulic drive mechanism for a high-pressure, large-bore plug valve that is inexpensive and good.
Disclosure of Invention
The invention mainly aims at the problems of complex structure, difficult processing and high price of the existing 'spiral hydraulic swing oil cylinder' and carries out innovative design so as to provide an economical and practical hydraulic driving mechanism special for a plug valve.
The invention is composed of a cylinder valve cover, a hydraulic cylinder barrel, a piston, a cylinder cover, an indicating rod, a pressing plate, an oil pipe joint, a valve rod, a thrust bearing, a cover flange, a matched sealing element and a matched connecting piece, and is characterized in that: the valve rod, two thrust bearings and a cover flange are arranged at the center and the lower end of the cylinder valve cover; rectangular spline holes are respectively sleeved on rectangular spline columns at two ends of a piston in the hydraulic cylinder barrel, at the insertion ends of a cylinder valve cover and a cylinder cover; the lower end of the piston is sleeved with a spiral spline column at the upper end of the valve rod by a spiral spline hole; the lower end of the indicating rod is fixed at the upper end of the piston by a pressure plate and a sunk screw; two ends of the hydraulic cylinder barrel are connected with the cylinder valve cover and the cylinder cover into a whole by a cylindrical head screw; the upper end of the indicating rod and the lower end of the valve rod respectively extend out of the upper end surface of the cylinder cover and the lower end surface of the cylinder valve cover and the cover flange.
The lower cylinder cover of the hydraulic cylinder and the valve cover of the plug valve are integrated, and the valve rod, the thrust bearing, the cover flange and the matched sealing ring are arranged in the central hole, so that the problem of repeated arrangement of the thrust bearing, the sealing ring, the lower cylinder cover and the valve cover when an external spiral hydraulic swing cylinder is used is solved, the product structure is simplified, the product volume is reduced, and the cost price is reduced. Rectangular spline holes are adopted at the inner ends of the cylinder valve cover and the cylinder cover to be matched with rectangular spline columns at two ends of the piston to prevent rotation, and the cylinder valve cover is compact in structure and easy to process; the lower end of the piston directly drives the spiral spline post at the upper end of the valve rod to rotate by using the spiral spline hole, so that the repeated configuration of rotary parts is avoided when an external spiral hydraulic swing oil cylinder is used, and the reduction of the product volume and the cost price are facilitated; the spiral spline column at the upper end of the longer valve rod and the stroke of the piston can convert the thrust of most pistons into the rotating force of the valve rod; the fixed piston stroke and the valve rod helical angle can accurately control the plug valve to rotate 90 degrees for switching without other limiting parts; the rectangular splines and the spiral splines at the two ends of the piston are completely soaked in hydraulic oil, so that the piston can be fully lubricated, the friction resistance between parts is reduced, and the service life of the piston is prolonged. The upper end of the indicating rod extends out of the upper end surface of the cylinder cover, so that the opening and closing conditions of the valve can be displayed; the lower end of the valve rod extends out of the lower end faces of the cylinder valve cover and the cover flange and can transmit the driving force of the piston to the rotary plug in the valve body. Therefore, the invention has the characteristics of compact structure, easy processing, accuracy, reliability, low price and the like, and is particularly suitable for the remote automatic control of the high-pressure and large-diameter plug valve.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention in full section;
FIG. 2 is a schematic top view of the cross section A-A of FIG. 1 according to the present invention.
The names of the components indicated by the reference numerals in the drawings are as follows:
1. the hydraulic cylinder comprises a cylinder valve cover, 2, a hydraulic cylinder barrel, 3, a piston, 4, a cylinder cover, 5, a cylindrical head screw, 6, an indicating rod, 7, a small sealing ring, 8, a pressing plate, 9, a countersunk head screw, 10, an oil pipe joint, 11, a large sealing ring, 12, a valve rod, 13, a sealing ring, 14, a thrust bearing, 15, a copper gasket, 16 and a cover flange.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
in fig. 1 and 2: the cylinder valve cover 1, the hydraulic cylinder barrel 2, the piston 3, the cylinder cover 4, the indicating rod 6, the pressing plate 8, the oil pipe joint 10, the valve rod 12, the thrust bearing 14 and the cover flange 16 are main parts of the hydraulic cylinder, the small sealing ring 7, the large sealing ring 11, the sealing ring 13 and the copper gasket 15 are matched sealing elements, and the cylindrical head screw 5 and the countersunk head screw 9 are national standard connecting pieces.
The cylinder valve cover 1 is a part with double functions of a hydraulic cylinder lower cylinder cover and a plug valve cover. Two circles of uniformly distributed through holes and a gasket ring groove are processed on the plane of the flange with the large diameter, the uniformly distributed through holes on the outer circle are bolt holes with the large diameter and are connected with a valve body of the plug valve; the through holes uniformly distributed on the inner ring are stepped holes for mounting cylindrical head screws 5 and are connected with the lower end of the hydraulic cylinder barrel 2; the gasket ring groove is provided with a downward opening and is used for sealing with the plug valve main body; and the flange can be provided with grease injection holes and other parts such as a grease injection valve and the like between the uniformly distributed through holes according to the specific requirements of the plug valve. The cylinder valve cover 1 is bounded by a large-diameter flange, a longer hollow cylinder insertion end is arranged above the cylinder valve cover, and a shorter hollow cylinder protruding end is arranged below the cylinder valve cover; three grooves for mounting the large sealing ring 11 are cut on the surface of the cylinder at the upper insertion end; at the center of the insertion end, the upper end is a rectangular spline hole, and a longer cylindrical hole which has an increased diameter and can be used as a tool withdrawal groove is arranged below the rectangular spline hole, so that a moving space is provided for the piston 3. A plurality of threaded blind holes are uniformly distributed on the end surface of the lower protruding end; a step through hole is arranged at the center of the protruding end and the large-diameter flange, and two sealing grooves are cut on the wall of the step hole with the smaller diameter so as to connect the valve rod 12, the sealing ring 13, the two thrust bearings 14, the copper gasket 15 and the cover flange 16 into a whole by using a cylindrical head screw 5.
The hydraulic cylinder barrel 2 is a hollow cylindrical part, and a plurality of thread blind holes which are externally connected are uniformly distributed on annular planes at two ends of the hydraulic cylinder barrel; two reducing through holes with threads at inlets are symmetrically distributed on the circumferential surface of the cylinder and are used for connecting the oil pipe joint 10.
A flange with a plurality of step holes is uniformly distributed above the cylinder cover 4, a round boss and a through hole are arranged at the center of the flange, and two grooves for mounting small sealing rings 7 are cut in the through hole; a longer hollow cylinder insertion end is arranged below the flange, and three grooves for mounting large sealing rings 11 are cut on the surface of the cylinder at the insertion end; at the center of the insertion end, the lower end is a rectangular spline hole, and a longer cylindrical hole which has an increased diameter and can be used as a tool withdrawal groove is arranged above the rectangular spline hole and also used as a moving space of the piston 3.
The middle of the piston 3 is a flat cylinder with a larger diameter, and the circumference of the flat cylinder is cut with two grooves for mounting large sealing rings 11 for precisely contacting with the inner wall of the hydraulic cylinder barrel 2; the two ends of the flat cylinder are symmetrically distributed tool withdrawal grooves and longer rectangular spline columns, the length of each rectangular spline column must be ensured within the stroke range of the piston 3, and the spline columns at the two ends can be respectively connected with the rectangular spline holes at the insertion ends of the cylinder valve cover 1 and the cylinder cover 4. A step hole for fixing the indicating rod 6, the pressing plate 8 and the countersunk head screw 9 and small threaded blind holes which are uniformly distributed are processed at the center of the upper end of the piston 3; the center of the lower end of the piston 3 is provided with a spiral spline hole and a longer cylindrical hole which has an increased diameter and can be used as a tool withdrawal groove, and the spiral spline hole is used for connecting a spiral spline column of the valve rod 12.
The valve rod 12 is a columnar part, a long section of spiral spline column is arranged above the valve rod, and the length of the long section of spiral spline column must ensure that the spiral spline hole at the lower end of the piston 3 is completely connected with the spiral spline column above the valve rod 12 when the piston 3 stops at the top of the stroke; a smooth cylinder is arranged below the spiral spline column, a raised waistcoat is arranged below the smooth cylinder, the smooth cylinder is also arranged below the waistcoat, and a full-length flat key is processed at the lower end of the smooth cylinder; the diameter of the cylinder and the spiral spline column above and below the waistcoat is the same, so that the thrust bearing 14 can be installed and sealed by the sealing ring 13 in the central hole of the cylinder valve cover 1 and the cover flange 16.
The indication rod 6, the pressure plate 8, the oil pipe joint 10, the thrust bearing 14 and the cover flange 16 are conventional parts with simple structures or universal parts and standard parts; the cover flange 16 therein serves to lift and seal the valve stem 12 and thrust bearing 14 and to take up the axial forces generated thereby.
When the plug valve is used, a sealing gasket ring and a large bolt are additionally used and are arranged above a valve body of the plug valve through a uniformly distributed hole on the outer ring of the cylinder valve cover 1 and a gasket ring groove below the uniformly distributed hole, and a through long flat key at the lower end of the valve rod 12 is connected with a key groove on the plug in the valve. Hydraulic oil is input into the hydraulic cylinder barrel 2 through the oil pipe joint 10, the piston 3 is driven to do reciprocating axial motion in the center holes of the insertion ends of the hydraulic cylinder barrel 2, the cylinder valve cover 1 and the cylinder cover 4, the lower end of the piston 3 drives the valve rod 12 to do reciprocating rotation at an angle of 90 degrees through the spiral spline, and the plug valve is driven to be opened and closed.
Claims (5)
1. The utility model provides an economical and practical's plug valve hydraulic drive mechanism comprises jar valve gap, hydraulic cylinder, piston, cylinder cap, pilot lever, clamp plate, oil pipe joint, valve rod, thrust bearing, lid flange and supporting sealing member, connector, characterized by: the valve rod, two thrust bearings and a cover flange are arranged at the center and the lower end of the cylinder valve cover; rectangular spline holes are respectively sleeved on rectangular spline columns at two ends of a piston in the hydraulic cylinder barrel, at the insertion ends of a cylinder valve cover and a cylinder cover; the lower end of the piston is sleeved with a spiral spline column at the upper end of the valve rod by a spiral spline hole; the lower end of the indicating rod is fixed at the upper end of the piston by a pressure plate and a sunk screw; two ends of the hydraulic cylinder barrel are connected with the cylinder valve cover and the cylinder cover into a whole by a cylindrical head screw; the upper end of the indicating rod and the lower end of the valve rod respectively extend out of the upper end surface of the cylinder cover and the lower end surface of the cylinder valve cover and the cover flange.
2. The hydraulic drive mechanism for a plug valve according to claim 1, wherein: the cylinder valve cover is bounded by a large-diameter flange, a longer hollow cylinder insertion end is arranged above the cylinder valve cover, and a shorter hollow cylinder protruding end is arranged below the cylinder valve cover; three grooves for mounting large sealing rings are cut on the surface of the cylinder at the upper insertion end; the rectangular spline hole is arranged at the upper end of the center of the insertion end, and the longer cylindrical hole which has the increased diameter and can be used as a tool withdrawal groove is arranged below the rectangular spline hole; a plurality of threaded blind holes are uniformly distributed on the end surface of the lower protruding end; a step through hole is arranged at the center of the protruding end and the large-diameter flange, and two sealing grooves are cut on the wall of the step hole with the smaller diameter.
3. The hydraulic drive mechanism for a plug valve according to claim 1, wherein: a flange with a plurality of step holes is uniformly distributed above the cylinder cover, a round boss and a through hole are arranged at the center of the flange, and two grooves for mounting small sealing rings are cut in the through hole; a longer hollow cylinder insertion end is arranged below the flange, and three grooves for mounting large sealing rings are cut on the surface of the cylinder at the insertion end; at the center of the insertion end, the lower end is a rectangular spline hole, and a longer cylindrical hole which has an increased diameter and can be used as a tool withdrawal groove is arranged above the rectangular spline hole.
4. The hydraulic drive mechanism for a plug valve according to claim 1, wherein: the middle of the piston is a flat cylinder with a larger diameter, and the circumference of the flat cylinder is cut with two grooves for mounting a large sealing ring; two ends of the flat cylinder are symmetrically distributed tool withdrawal grooves and longer rectangular spline columns; a stepped hole for fixing the indicating rod, the pressing plate and the countersunk head screw and small threaded blind holes which are uniformly distributed are processed at the center of the upper end of the piston; the center of the lower end of the piston is provided with a spiral spline hole and a longer cylindrical hole which has an increased diameter and can be used as a tool withdrawal groove.
5. The hydraulic drive mechanism for a plug valve according to claim 1, wherein: the valve rod is a columnar part, a long spiral spline column is arranged above the valve rod, a smooth cylinder is arranged below the spiral spline column, a raised waistcoat is arranged below the smooth cylinder, a smooth cylinder is also arranged below the waistcoat, and a full-length flat key is processed at the lower end of the smooth cylinder; the diameters of the cylinder above and below the waistcoat and the spiral spline column are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078627.8A CN110701367A (en) | 2019-10-29 | 2019-10-29 | Economical and practical hydraulic driving mechanism for plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078627.8A CN110701367A (en) | 2019-10-29 | 2019-10-29 | Economical and practical hydraulic driving mechanism for plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110701367A true CN110701367A (en) | 2020-01-17 |
Family
ID=69204428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911078627.8A Pending CN110701367A (en) | 2019-10-29 | 2019-10-29 | Economical and practical hydraulic driving mechanism for plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110701367A (en) |
-
2019
- 2019-10-29 CN CN201911078627.8A patent/CN110701367A/en active Pending
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